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 <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "jump_target.h"
  39 #include "symbol_t.h"
  40 #include "token_t.h"
  41 #include "type_t.h"
  42 #include "ast_t.h"
  43 #include "entity_t.h"
  44 #include "parser.h"
  45 #include "diagnostic.h"
  46 #include "lang_features.h"
  47 #include "types.h"
  48 #include "type_hash.h"
  49 #include "mangle.h"
  50 #include "walk.h"
  51 #include "warning.h"
  52 #include "printer.h"
  53 #include "entitymap_t.h"
  54 #include "driver/firm_opt.h"
  55
  56 typedef struct trampoline_region trampoline_region;
  57 struct trampoline_region {
  58         ir_entity        *function;    /**< The function that is called by this trampoline */
  59         ir_entity        *region;      /**< created region for the trampoline */
  60 };
  61
  62 fp_model_t firm_fp_model = fp_model_precise;
  63
  64 static const backend_params *be_params;
  65
  66 static ir_type *ir_type_char;
  67 static ir_type *ir_type_wchar_t;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int         next_value_number_function;
  76 static jump_target continue_target;
  77 static jump_target break_target;
  78 static ir_node    *current_switch;
  79 static bool        saw_default_label;
  80 static entity_t  **inner_functions;
  81 static jump_target ijmp_target;
  82 static ir_node   **ijmp_ops;
  83 static ir_node   **ijmp_blocks;
  84 static bool        constant_folding;
  85
  86 #define PUSH_BREAK(val) \
  87         jump_target const old_break_target = break_target; \
  88         (init_jump_target(&break_target, (val)))
  89 #define POP_BREAK() \
  90         ((void)(break_target = old_break_target))
  91
  92 #define PUSH_CONTINUE(val) \
  93         jump_target const old_continue_target = continue_target; \
  94         (init_jump_target(&continue_target, (val)))
  95 #define POP_CONTINUE() \
  96         ((void)(continue_target = old_continue_target))
  97
  98 #define PUSH_IRG(val) \
  99         ir_graph *const old_irg = current_ir_graph; \
 100         ir_graph *const new_irg = (val); \
 101         ((void)(current_ir_graph = new_irg))
 102
 103 #define POP_IRG() \
 104         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
 105
 106 static const entity_t     *current_function_entity;
 107 static ir_node            *current_function_name;
 108 static ir_node            *current_funcsig;
 109 static ir_graph           *current_function;
 110 static translation_unit_t *current_translation_unit;
 111 static trampoline_region  *current_trampolines;
 112 static ir_type            *current_outer_frame;
 113 static ir_node            *current_static_link;
 114 static ir_entity          *current_vararg_entity;
 115
 116 static entitymap_t  entitymap;
 117
 118 static struct obstack asm_obst;
 119
 120 typedef enum declaration_kind_t {
 121         DECLARATION_KIND_UNKNOWN,
 122         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 123         DECLARATION_KIND_GLOBAL_VARIABLE,
 124         DECLARATION_KIND_LOCAL_VARIABLE,
 125         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 126         DECLARATION_KIND_PARAMETER,
 127         DECLARATION_KIND_PARAMETER_ENTITY,
 128         DECLARATION_KIND_FUNCTION,
 129         DECLARATION_KIND_COMPOUND_MEMBER,
 130         DECLARATION_KIND_INNER_FUNCTION
 131 } declaration_kind_t;
 132
 133 static ir_type *get_ir_type_incomplete(type_t *type);
 134
 135 static void enqueue_inner_function(entity_t *entity)
 136 {
 137         if (inner_functions == NULL)
 138                 inner_functions = NEW_ARR_F(entity_t *, 0);
 139         ARR_APP1(entity_t*, inner_functions, entity);
 140 }
 141
 142 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 143 {
 144         const entity_t *entity = get_irg_loc_description(irg, pos);
 145
 146         if (entity != NULL) {
 147                 source_position_t const *const pos = &entity->base.source_position;
 148                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 149         }
 150         return new_r_Unknown(irg, mode);
 151 }
 152
 153 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 154 {
 155         source_position_t const *const pos = (source_position_t const*)dbg;
 156         if (pos) {
 157                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 158         } else {
 159                 return (src_loc_t){ NULL, 0, 0 };
 160         }
 161 }
 162
 163 static dbg_info *get_dbg_info(const source_position_t *pos)
 164 {
 165         return (dbg_info*) pos;
 166 }
 167
 168 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 169                                     const type_dbg_info *dbg)
 170 {
 171         assert(dbg != NULL);
 172         print_to_buffer(buffer, buffer_size);
 173         const type_t *type = (const type_t*) dbg;
 174         print_type(type);
 175         finish_print_to_buffer();
 176 }
 177
 178 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 179 {
 180         return (type_dbg_info*) type;
 181 }
 182
 183 /* is the current block a reachable one? */
 184 static bool currently_reachable(void)
 185 {
 186         ir_node *const block = get_cur_block();
 187         return block != NULL && !is_Bad(block);
 188 }
 189
 190 static void set_unreachable_now(void)
 191 {
 192         set_cur_block(NULL);
 193 }
 194
 195 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 196
 197 static ir_node *_expression_to_firm(const expression_t *expression);
 198 static ir_node *expression_to_firm(const expression_t *expression);
 199
 200 static unsigned decide_modulo_shift(unsigned type_size)
 201 {
 202         if (architecture_modulo_shift == 0)
 203                 return 0;
 204         if (type_size < architecture_modulo_shift)
 205                 return architecture_modulo_shift;
 206         return type_size;
 207 }
 208
 209 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 210 {
 211         unsigned flags = get_atomic_type_flags(kind);
 212         unsigned size  = get_atomic_type_size(kind);
 213         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 214             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 215                 switch (size) {
 216                 case 4:  return get_modeF();
 217                 case 8:  return get_modeD();
 218                 default: panic("unexpected kind");
 219                 }
 220         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 221                 char            name[64];
 222                 unsigned        bit_size     = size * 8;
 223                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 224                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 225
 226                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 227                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 228                                     modulo_shift);
 229         }
 230
 231         return NULL;
 232 }
 233
 234 /**
 235  * Initialises the atomic modes depending on the machine size.
 236  */
 237 static void init_atomic_modes(void)
 238 {
 239         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 240         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 241                 if (atomic_modes[i] != NULL)
 242                         continue;
 243                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 244         }
 245 }
 246
 247 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 248 {
 249         assert(kind <= ATOMIC_TYPE_LAST);
 250         return atomic_modes[kind];
 251 }
 252
 253 static ir_node *get_vla_size(array_type_t *const type)
 254 {
 255         ir_node *size_node = type->size_node;
 256         if (size_node == NULL) {
 257                 size_node = expression_to_firm(type->size_expression);
 258                 type->size_node = size_node;
 259         }
 260         return size_node;
 261 }
 262
 263 static unsigned count_parameters(const function_type_t *function_type)
 264 {
 265         unsigned count = 0;
 266
 267         function_parameter_t *parameter = function_type->parameters;
 268         for ( ; parameter != NULL; parameter = parameter->next) {
 269                 ++count;
 270         }
 271
 272         return count;
 273 }
 274
 275 /**
 276  * Creates a Firm type for an atomic type
 277  */
 278 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 279 {
 280         ir_mode        *mode      = atomic_modes[akind];
 281         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 282         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 283         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 284
 285         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 286         set_type_alignment_bytes(irtype, alignment);
 287
 288         return irtype;
 289 }
 290
 291 /**
 292  * Creates a Firm type for a complex type
 293  */
 294 static ir_type *create_complex_type(const atomic_type_t *type)
 295 {
 296         atomic_type_kind_t  kind = type->akind;
 297         ir_mode            *mode = atomic_modes[kind];
 298         ident              *id   = get_mode_ident(mode);
 299
 300         (void) id;
 301
 302         /* FIXME: finish the array */
 303         return NULL;
 304 }
 305
 306 /**
 307  * Creates a Firm type for an imaginary type
 308  */
 309 static ir_type *create_imaginary_type(const atomic_type_t *type)
 310 {
 311         return create_atomic_type(type->akind, (const type_t*)type);
 312 }
 313
 314 /**
 315  * return type of a parameter (and take transparent union gnu extension into
 316  * account)
 317  */
 318 static type_t *get_parameter_type(type_t *orig_type)
 319 {
 320         type_t *type = skip_typeref(orig_type);
 321         if (is_type_union(type)
 322                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 323                 compound_t *compound = type->compound.compound;
 324                 type                 = compound->members.entities->declaration.type;
 325         }
 326
 327         return type;
 328 }
 329
 330 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 331 {
 332         type_t        *return_type  = skip_typeref(function_type->return_type);
 333
 334         int            n_parameters = count_parameters(function_type)
 335                                        + (for_closure ? 1 : 0);
 336         int            n_results    = is_type_void(return_type) ? 0 : 1;
 337         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 338         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 339
 340         if (!is_type_void(return_type)) {
 341                 ir_type *restype = get_ir_type(return_type);
 342                 set_method_res_type(irtype, 0, restype);
 343         }
 344
 345         function_parameter_t *parameter = function_type->parameters;
 346         int                   n         = 0;
 347         if (for_closure) {
 348                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 349                 set_method_param_type(irtype, n, p_irtype);
 350                 ++n;
 351         }
 352         for ( ; parameter != NULL; parameter = parameter->next) {
 353                 type_t  *type     = get_parameter_type(parameter->type);
 354                 ir_type *p_irtype = get_ir_type(type);
 355                 set_method_param_type(irtype, n, p_irtype);
 356                 ++n;
 357         }
 358
 359         bool is_variadic = function_type->variadic;
 360
 361         if (is_variadic)
 362                 set_method_variadicity(irtype, variadicity_variadic);
 363
 364         unsigned cc = get_method_calling_convention(irtype);
 365         switch (function_type->calling_convention) {
 366         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 367         case CC_CDECL:
 368 is_cdecl:
 369                 set_method_calling_convention(irtype, SET_CDECL(cc));
 370                 break;
 371
 372         case CC_STDCALL:
 373                 if (is_variadic)
 374                         goto is_cdecl;
 375
 376                 /* only non-variadic function can use stdcall, else use cdecl */
 377                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 378                 break;
 379
 380         case CC_FASTCALL:
 381                 if (is_variadic)
 382                         goto is_cdecl;
 383                 /* only non-variadic function can use fastcall, else use cdecl */
 384                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 385                 break;
 386
 387         case CC_THISCALL:
 388                 /* Hmm, leave default, not accepted by the parser yet. */
 389                 break;
 390         }
 391
 392         if (for_closure)
 393                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 394
 395         const decl_modifiers_t modifiers = function_type->modifiers;
 396         if (modifiers & DM_CONST)
 397                 add_method_additional_properties(irtype, mtp_property_const);
 398         if (modifiers & DM_PURE)
 399                 add_method_additional_properties(irtype, mtp_property_pure);
 400         if (modifiers & DM_RETURNS_TWICE)
 401                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 402         if (modifiers & DM_NORETURN)
 403                 add_method_additional_properties(irtype, mtp_property_noreturn);
 404         if (modifiers & DM_NOTHROW)
 405                 add_method_additional_properties(irtype, mtp_property_nothrow);
 406         if (modifiers & DM_MALLOC)
 407                 add_method_additional_properties(irtype, mtp_property_malloc);
 408
 409         return irtype;
 410 }
 411
 412 static ir_type *create_pointer_type(pointer_type_t *type)
 413 {
 414         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 415         type_t        *points_to    = type->points_to;
 416         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 417         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 418
 419         return irtype;
 420 }
 421
 422 static ir_type *create_reference_type(reference_type_t *type)
 423 {
 424         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 425         type_t        *refers_to    = type->refers_to;
 426         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 427         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 428
 429         return irtype;
 430 }
 431
 432 static ir_type *create_array_type(array_type_t *type)
 433 {
 434         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 435         type_t        *element_type    = type->element_type;
 436         ir_type       *ir_element_type = get_ir_type(element_type);
 437         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 438
 439         const int align = get_type_alignment_bytes(ir_element_type);
 440         set_type_alignment_bytes(irtype, align);
 441
 442         if (type->size_constant) {
 443                 int n_elements = type->size;
 444
 445                 set_array_bounds_int(irtype, 0, 0, n_elements);
 446
 447                 size_t elemsize = get_type_size_bytes(ir_element_type);
 448                 if (elemsize % align > 0) {
 449                         elemsize += align - (elemsize % align);
 450                 }
 451                 set_type_size_bytes(irtype, n_elements * elemsize);
 452         } else {
 453                 set_array_lower_bound_int(irtype, 0, 0);
 454         }
 455         set_type_state(irtype, layout_fixed);
 456
 457         return irtype;
 458 }
 459
 460 /**
 461  * Return the signed integer type of size bits.
 462  *
 463  * @param size   the size
 464  */
 465 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 466                                                  unsigned size,
 467                                                                                                  const type_t *type)
 468 {
 469         static ir_mode *s_modes[64 + 1] = {NULL, };
 470         ir_type *res;
 471         ir_mode *mode;
 472
 473         if (size <= 0 || size > 64)
 474                 return NULL;
 475
 476         mode = s_modes[size];
 477         if (mode == NULL) {
 478                 char name[32];
 479
 480                 snprintf(name, sizeof(name), "bf_I%u", size);
 481                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 482                 s_modes[size] = mode;
 483         }
 484
 485         type_dbg_info *dbgi = get_type_dbg_info_(type);
 486         res                 = new_d_type_primitive(mode, dbgi);
 487         set_primitive_base_type(res, base_tp);
 488
 489         return res;
 490 }
 491
 492 /**
 493  * Return the unsigned integer type of size bits.
 494  *
 495  * @param size   the size
 496  */
 497 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 498                                                    unsigned size,
 499                                                                                                    const type_t *type)
 500 {
 501         static ir_mode *u_modes[64 + 1] = {NULL, };
 502         ir_type *res;
 503         ir_mode *mode;
 504
 505         if (size <= 0 || size > 64)
 506                 return NULL;
 507
 508         mode = u_modes[size];
 509         if (mode == NULL) {
 510                 char name[32];
 511
 512                 snprintf(name, sizeof(name), "bf_U%u", size);
 513                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 514                 u_modes[size] = mode;
 515         }
 516
 517         type_dbg_info *dbgi = get_type_dbg_info_(type);
 518         res = new_d_type_primitive(mode, dbgi);
 519         set_primitive_base_type(res, base_tp);
 520
 521         return res;
 522 }
 523
 524 static ir_type *create_bitfield_type(const entity_t *entity)
 525 {
 526         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 527         type_t *base = skip_typeref(entity->declaration.type);
 528         assert(is_type_integer(base));
 529         ir_type *irbase = get_ir_type(base);
 530
 531         unsigned bit_size = entity->compound_member.bit_size;
 532
 533         if (is_type_signed(base)) {
 534                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 535         } else {
 536                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 537         }
 538 }
 539
 540 /**
 541  * Construct firm type from ast struct type.
 542  */
 543 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 544 {
 545         compound_t *compound = type->compound;
 546
 547         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 548                 return compound->irtype;
 549         }
 550
 551         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 552
 553         symbol_t *type_symbol = compound->base.symbol;
 554         ident    *id;
 555         if (type_symbol != NULL) {
 556                 id = new_id_from_str(type_symbol->string);
 557         } else {
 558                 if (is_union) {
 559                         id = id_unique("__anonymous_union.%u");
 560                 } else {
 561                         id = id_unique("__anonymous_struct.%u");
 562                 }
 563         }
 564
 565         ir_type *irtype;
 566         if (is_union) {
 567                 irtype = new_type_union(id);
 568         } else {
 569                 irtype = new_type_struct(id);
 570         }
 571
 572         compound->irtype_complete = false;
 573         compound->irtype          = irtype;
 574
 575         if (incomplete)
 576                 return irtype;
 577
 578         if (is_union) {
 579                 layout_union_type(type);
 580         } else {
 581                 layout_struct_type(type);
 582         }
 583
 584         compound->irtype_complete = true;
 585
 586         entity_t *entry = compound->members.entities;
 587         for ( ; entry != NULL; entry = entry->base.next) {
 588                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 589                         continue;
 590
 591                 symbol_t *symbol     = entry->base.symbol;
 592                 type_t   *entry_type = entry->declaration.type;
 593                 ident    *ident;
 594                 if (symbol == NULL) {
 595                         /* anonymous bitfield member, skip */
 596                         if (entry->compound_member.bitfield)
 597                                 continue;
 598                         assert(is_type_compound(entry_type));
 599                         ident = id_unique("anon.%u");
 600                 } else {
 601                         ident = new_id_from_str(symbol->string);
 602                 }
 603
 604                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 605
 606                 ir_type *entry_irtype;
 607                 if (entry->compound_member.bitfield) {
 608                         entry_irtype = create_bitfield_type(entry);
 609                 } else {
 610                         entry_irtype = get_ir_type(entry_type);
 611                 }
 612                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 613
 614                 set_entity_offset(entity, entry->compound_member.offset);
 615                 set_entity_offset_bits_remainder(entity,
 616                                                  entry->compound_member.bit_offset);
 617
 618                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 619                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 620                 entry->compound_member.entity = entity;
 621         }
 622
 623         set_type_alignment_bytes(irtype, compound->alignment);
 624         set_type_size_bytes(irtype, compound->size);
 625         set_type_state(irtype, layout_fixed);
 626
 627         return irtype;
 628 }
 629
 630 void determine_enum_values(enum_type_t *const type)
 631 {
 632         ir_mode   *const mode    = atomic_modes[type->base.akind];
 633         ir_tarval *const one     = get_mode_one(mode);
 634         ir_tarval *      tv_next = get_mode_null(mode);
 635
 636         enum_t   *enume = type->enume;
 637         entity_t *entry = enume->base.next;
 638         for (; entry != NULL; entry = entry->base.next) {
 639                 if (entry->kind != ENTITY_ENUM_VALUE)
 640                         break;
 641
 642                 expression_t *const init = entry->enum_value.value;
 643                 if (init != NULL) {
 644                         tv_next = fold_constant_to_tarval(init);
 645                 }
 646                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 647                 entry->enum_value.tv = tv_next;
 648                 tv_next = tarval_add(tv_next, one);
 649         }
 650 }
 651
 652 static ir_type *create_enum_type(enum_type_t *const type)
 653 {
 654         return create_atomic_type(type->base.akind, (const type_t*) type);
 655 }
 656
 657 static ir_type *get_ir_type_incomplete(type_t *type)
 658 {
 659         type = skip_typeref(type);
 660
 661         if (type->base.firm_type != NULL) {
 662                 return type->base.firm_type;
 663         }
 664
 665         if (is_type_compound(type)) {
 666                 return create_compound_type(&type->compound, true);
 667         } else {
 668                 return get_ir_type(type);
 669         }
 670 }
 671
 672 ir_type *get_ir_type(type_t *type)
 673 {
 674         type = skip_typeref(type);
 675
 676         if (type->base.firm_type != NULL) {
 677                 return type->base.firm_type;
 678         }
 679
 680         ir_type *firm_type = NULL;
 681         switch (type->kind) {
 682         case TYPE_ATOMIC:
 683                 firm_type = create_atomic_type(type->atomic.akind, type);
 684                 break;
 685         case TYPE_COMPLEX:
 686                 firm_type = create_complex_type(&type->atomic);
 687                 break;
 688         case TYPE_IMAGINARY:
 689                 firm_type = create_imaginary_type(&type->atomic);
 690                 break;
 691         case TYPE_FUNCTION:
 692                 firm_type = create_method_type(&type->function, false);
 693                 break;
 694         case TYPE_POINTER:
 695                 firm_type = create_pointer_type(&type->pointer);
 696                 break;
 697         case TYPE_REFERENCE:
 698                 firm_type = create_reference_type(&type->reference);
 699                 break;
 700         case TYPE_ARRAY:
 701                 firm_type = create_array_type(&type->array);
 702                 break;
 703         case TYPE_COMPOUND_STRUCT:
 704         case TYPE_COMPOUND_UNION:
 705                 firm_type = create_compound_type(&type->compound, false);
 706                 break;
 707         case TYPE_ENUM:
 708                 firm_type = create_enum_type(&type->enumt);
 709                 break;
 710
 711         case TYPE_ERROR:
 712         case TYPE_TYPEOF:
 713         case TYPE_TYPEDEF:
 714                 break;
 715         }
 716         if (firm_type == NULL)
 717                 panic("unknown type found");
 718
 719         type->base.firm_type = firm_type;
 720         return firm_type;
 721 }
 722
 723 static ir_mode *get_ir_mode_storage(type_t *type)
 724 {
 725         type = skip_typeref(type);
 726
 727         /* Firm doesn't report a mode for arrays and structs/unions. */
 728         if (!is_type_scalar(type)) {
 729                 return mode_P_data;
 730         }
 731
 732         ir_type *const irtype = get_ir_type(type);
 733         ir_mode *const mode   = get_type_mode(irtype);
 734         assert(mode != NULL);
 735         return mode;
 736 }
 737
 738 /*
 739  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 740  * int that it returns bigger modes for floating point on some platforms
 741  * (x87 internally does arithemtic with 80bits)
 742  */
 743 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 744 {
 745         ir_mode *mode = get_ir_mode_storage(type);
 746         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 747                 return mode_float_arithmetic;
 748         }
 749
 750         return mode;
 751 }
 752
 753 /**
 754  * Return a node representing the size of a type.
 755  */
 756 static ir_node *get_type_size_node(type_t *type)
 757 {
 758         unsigned size;
 759         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 760         type = skip_typeref(type);
 761
 762         if (is_type_array(type) && type->array.is_vla) {
 763                 ir_node *size_node = get_vla_size(&type->array);
 764                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 765                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 766                 return real_size;
 767         }
 768
 769         size = get_type_size(type);
 770         return new_Const_long(mode, size);
 771 }
 772
 773 /** Names of the runtime functions. */
 774 static const struct {
 775         int        id;           /**< the rts id */
 776         int        n_res;        /**< number of return values */
 777         const char *name;        /**< the name of the rts function */
 778         int        n_params;     /**< number of parameters */
 779         unsigned   flags;        /**< language flags */
 780 } rts_data[] = {
 781         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 782         { rts_abort,      0, "abort",        0, _C89 },
 783         { rts_alloca,     1, "alloca",       1, _ALL },
 784         { rts_abs,        1, "abs",          1, _C89 },
 785         { rts_labs,       1, "labs",         1, _C89 },
 786         { rts_llabs,      1, "llabs",        1, _C99 },
 787         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 788
 789         { rts_fabs,       1, "fabs",         1, _C89 },
 790         { rts_sqrt,       1, "sqrt",         1, _C89 },
 791         { rts_cbrt,       1, "cbrt",         1, _C99 },
 792         { rts_exp,        1, "exp",          1, _C89 },
 793         { rts_exp2,       1, "exp2",         1, _C89 },
 794         { rts_exp10,      1, "exp10",        1, _GNUC },
 795         { rts_log,        1, "log",          1, _C89 },
 796         { rts_log2,       1, "log2",         1, _C89 },
 797         { rts_log10,      1, "log10",        1, _C89 },
 798         { rts_pow,        1, "pow",          2, _C89 },
 799         { rts_sin,        1, "sin",          1, _C89 },
 800         { rts_cos,        1, "cos",          1, _C89 },
 801         { rts_tan,        1, "tan",          1, _C89 },
 802         { rts_asin,       1, "asin",         1, _C89 },
 803         { rts_acos,       1, "acos",         1, _C89 },
 804         { rts_atan,       1, "atan",         1, _C89 },
 805         { rts_sinh,       1, "sinh",         1, _C89 },
 806         { rts_cosh,       1, "cosh",         1, _C89 },
 807         { rts_tanh,       1, "tanh",         1, _C89 },
 808
 809         { rts_fabsf,      1, "fabsf",        1, _C99 },
 810         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 811         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 812         { rts_expf,       1, "expf",         1, _C99 },
 813         { rts_exp2f,      1, "exp2f",        1, _C99 },
 814         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 815         { rts_logf,       1, "logf",         1, _C99 },
 816         { rts_log2f,      1, "log2f",        1, _C99 },
 817         { rts_log10f,     1, "log10f",       1, _C99 },
 818         { rts_powf,       1, "powf",         2, _C99 },
 819         { rts_sinf,       1, "sinf",         1, _C99 },
 820         { rts_cosf,       1, "cosf",         1, _C99 },
 821         { rts_tanf,       1, "tanf",         1, _C99 },
 822         { rts_asinf,      1, "asinf",        1, _C99 },
 823         { rts_acosf,      1, "acosf",        1, _C99 },
 824         { rts_atanf,      1, "atanf",        1, _C99 },
 825         { rts_sinhf,      1, "sinhf",        1, _C99 },
 826         { rts_coshf,      1, "coshf",        1, _C99 },
 827         { rts_tanhf,      1, "tanhf",        1, _C99 },
 828
 829         { rts_fabsl,      1, "fabsl",        1, _C99 },
 830         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 831         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 832         { rts_expl,       1, "expl",         1, _C99 },
 833         { rts_exp2l,      1, "exp2l",        1, _C99 },
 834         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 835         { rts_logl,       1, "logl",         1, _C99 },
 836         { rts_log2l,      1, "log2l",        1, _C99 },
 837         { rts_log10l,     1, "log10l",       1, _C99 },
 838         { rts_powl,       1, "powl",         2, _C99 },
 839         { rts_sinl,       1, "sinl",         1, _C99 },
 840         { rts_cosl,       1, "cosl",         1, _C99 },
 841         { rts_tanl,       1, "tanl",         1, _C99 },
 842         { rts_asinl,      1, "asinl",        1, _C99 },
 843         { rts_acosl,      1, "acosl",        1, _C99 },
 844         { rts_atanl,      1, "atanl",        1, _C99 },
 845         { rts_sinhl,      1, "sinhl",        1, _C99 },
 846         { rts_coshl,      1, "coshl",        1, _C99 },
 847         { rts_tanhl,      1, "tanhl",        1, _C99 },
 848
 849         { rts_strcmp,     1, "strcmp",       2, _C89 },
 850         { rts_strncmp,    1, "strncmp",      3, _C89 },
 851         { rts_strcpy,     1, "strcpy",       2, _C89 },
 852         { rts_strlen,     1, "strlen",       1, _C89 },
 853         { rts_memcpy,     1, "memcpy",       3, _C89 },
 854         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 855         { rts_memmove,    1, "memmove",      3, _C89 },
 856         { rts_memset,     1, "memset",       3, _C89 },
 857         { rts_memcmp,     1, "memcmp",       3, _C89 },
 858 };
 859
 860 static ident *rts_idents[lengthof(rts_data)];
 861
 862 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 863
 864 void set_create_ld_ident(ident *(*func)(entity_t*))
 865 {
 866         create_ld_ident = func;
 867 }
 868
 869 static bool declaration_is_definition(const entity_t *entity)
 870 {
 871         switch (entity->kind) {
 872         case ENTITY_VARIABLE:
 873                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 874         case ENTITY_FUNCTION:
 875                 return entity->function.body != NULL;
 876         case ENTITY_PARAMETER:
 877         case ENTITY_COMPOUND_MEMBER:
 878                 return false;
 879         case ENTITY_TYPEDEF:
 880         case ENTITY_ENUM:
 881         case ENTITY_ENUM_VALUE:
 882         case ENTITY_NAMESPACE:
 883         case ENTITY_LABEL:
 884         case ENTITY_LOCAL_LABEL:
 885                 break;
 886         }
 887         panic("entity is not a declaration");
 888 }
 889
 890 /**
 891  * Handle GNU attributes for entities
 892  *
 893  * @param ent   the entity
 894  * @param decl  the routine declaration
 895  */
 896 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 897 {
 898         assert(is_declaration(entity));
 899         decl_modifiers_t modifiers = entity->declaration.modifiers;
 900
 901         if (is_method_entity(irentity)) {
 902                 if (modifiers & DM_PURE)
 903                         add_entity_additional_properties(irentity, mtp_property_pure);
 904                 if (modifiers & DM_CONST)
 905                         add_entity_additional_properties(irentity, mtp_property_const);
 906                 if (modifiers & DM_NOINLINE)
 907                         add_entity_additional_properties(irentity, mtp_property_noinline);
 908                 if (modifiers & DM_FORCEINLINE)
 909                         add_entity_additional_properties(irentity, mtp_property_always_inline);
 910                 if (modifiers & DM_NAKED)
 911                         add_entity_additional_properties(irentity, mtp_property_naked);
 912                 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
 913                         add_entity_additional_properties(irentity,
 914                                                                                          mtp_property_inline_recommended);
 915         }
 916         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 917                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 918         }
 919         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 920             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 921                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 922         }
 923 }
 924
 925 static bool is_main(entity_t *entity)
 926 {
 927         static symbol_t *sym_main = NULL;
 928         if (sym_main == NULL) {
 929                 sym_main = symbol_table_insert("main");
 930         }
 931
 932         if (entity->base.symbol != sym_main)
 933                 return false;
 934         /* must be in outermost scope */
 935         if (entity->base.parent_scope != &current_translation_unit->scope)
 936                 return false;
 937
 938         return true;
 939 }
 940
 941 /**
 942  * Creates an entity representing a function.
 943  *
 944  * @param entity       the function declaration/definition
 945  * @param owner_type   the owner type of this function, NULL
 946  *                     for global functions
 947  */
 948 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 949 {
 950         assert(entity->kind == ENTITY_FUNCTION);
 951         if (entity->function.irentity != NULL)
 952                 return entity->function.irentity;
 953
 954         switch (entity->function.btk) {
 955         case BUILTIN_NONE:
 956         case BUILTIN_LIBC:
 957         case BUILTIN_LIBC_CHECK:
 958                 break;
 959         default:
 960                 return NULL;
 961         }
 962
 963         symbol_t *symbol = entity->base.symbol;
 964         ident    *id     = new_id_from_str(symbol->string);
 965
 966         /* already an entity defined? */
 967         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 968         bool const has_body = entity->function.body != NULL;
 969         if (irentity != NULL) {
 970                 goto entity_created;
 971         }
 972
 973         ir_type *ir_type_method;
 974         if (entity->function.need_closure)
 975                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 976         else
 977                 ir_type_method = get_ir_type(entity->declaration.type);
 978
 979         bool nested_function = false;
 980         if (owner_type == NULL)
 981                 owner_type = get_glob_type();
 982         else
 983                 nested_function = true;
 984
 985         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 986         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 987
 988         ident *ld_id;
 989         if (nested_function)
 990                 ld_id = id_unique("inner.%u");
 991         else
 992                 ld_id = create_ld_ident(entity);
 993         set_entity_ld_ident(irentity, ld_id);
 994
 995         handle_decl_modifiers(irentity, entity);
 996
 997         if (! nested_function) {
 998                 storage_class_tag_t const storage_class
 999                         = (storage_class_tag_t) entity->declaration.storage_class;
1000                 if (storage_class == STORAGE_CLASS_STATIC) {
1001                     set_entity_visibility(irentity, ir_visibility_local);
1002                 } else {
1003                     set_entity_visibility(irentity, ir_visibility_external);
1004                 }
1005
1006                 bool const is_inline = entity->function.is_inline;
1007                 if (is_inline && has_body) {
1008                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1009                             || ((c_mode & _C99) == 0
1010                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1011                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1012                         }
1013                 }
1014         } else {
1015                 /* nested functions are always local */
1016                 set_entity_visibility(irentity, ir_visibility_local);
1017         }
1018
1019         /* We should check for file scope here, but as long as we compile C only
1020            this is not needed. */
1021         if (!freestanding && !has_body) {
1022                 /* check for a known runtime function */
1023                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1024                         if (id != rts_idents[i])
1025                                 continue;
1026
1027                         function_type_t *function_type
1028                                 = &entity->declaration.type->function;
1029                         /* rts_entities code can't handle a "wrong" number of parameters */
1030                         if (function_type->unspecified_parameters)
1031                                 continue;
1032
1033                         /* check number of parameters */
1034                         int n_params = count_parameters(function_type);
1035                         if (n_params != rts_data[i].n_params)
1036                                 continue;
1037
1038                         type_t *return_type = skip_typeref(function_type->return_type);
1039                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1040                         if (n_res != rts_data[i].n_res)
1041                                 continue;
1042
1043                         /* ignore those rts functions not necessary needed for current mode */
1044                         if ((c_mode & rts_data[i].flags) == 0)
1045                                 continue;
1046                         assert(rts_entities[rts_data[i].id] == NULL);
1047                         rts_entities[rts_data[i].id] = irentity;
1048                 }
1049         }
1050
1051         entitymap_insert(&entitymap, symbol, irentity);
1052
1053 entity_created:
1054         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1055         entity->function.irentity = irentity;
1056
1057         return irentity;
1058 }
1059
1060 /**
1061  * Creates a SymConst for a given entity.
1062  *
1063  * @param dbgi    debug info
1064  * @param entity  the entity
1065  */
1066 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1067 {
1068         assert(entity != NULL);
1069         union symconst_symbol sym;
1070         sym.entity_p = entity;
1071         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1072 }
1073
1074 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1075 {
1076         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1077 }
1078
1079 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1080                                    ir_mode *dest_mode)
1081 {
1082         if (is_Const(value)) {
1083                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1084         }
1085
1086         ir_node *cond       = new_d_Cond(dbgi, value);
1087         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1088         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1089         ir_node *tblock     = new_Block(1, &proj_true);
1090         ir_node *fblock     = new_Block(1, &proj_false);
1091         set_cur_block(tblock);
1092         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1093         ir_node *tjump  = new_Jmp();
1094         set_cur_block(fblock);
1095         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1096         ir_node *fjump  = new_Jmp();
1097
1098         ir_node *in[2]      = { tjump, fjump };
1099         ir_node *mergeblock = new_Block(2, in);
1100         set_cur_block(mergeblock);
1101         ir_node *phi_in[2]  = { const1, const0 };
1102         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1103         return phi;
1104 }
1105
1106 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1107 {
1108         ir_mode *value_mode = get_irn_mode(value);
1109
1110         if (value_mode == dest_mode)
1111                 return value;
1112
1113         if (dest_mode == mode_b) {
1114                 ir_node *zero = new_Const(get_mode_null(value_mode));
1115                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1116                 return cmp;
1117         } else if (value_mode == mode_b) {
1118                 return create_conv_from_b(dbgi, value, dest_mode);
1119         }
1120
1121         return new_d_Conv(dbgi, value, dest_mode);
1122 }
1123
1124 /**
1125  * Creates a SymConst node representing a string constant.
1126  *
1127  * @param src_pos    the source position of the string constant
1128  * @param id_prefix  a prefix for the name of the generated string constant
1129  * @param value      the value of the string constant
1130  */
1131 static ir_node *string_to_firm(source_position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1132 {
1133         size_t            const slen        = get_string_len(value) + 1;
1134         ir_initializer_t *const initializer = create_initializer_compound(slen);
1135         ir_type          *      elem_type;
1136         switch (value->encoding) {
1137         case STRING_ENCODING_CHAR: {
1138                 elem_type = ir_type_char;
1139
1140                 ir_mode *const mode = get_type_mode(elem_type);
1141                 char const    *p    = value->begin;
1142                 for (size_t i = 0; i < slen; ++i) {
1143                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1144                         ir_initializer_t *val = create_initializer_tarval(tv);
1145                         set_initializer_compound_value(initializer, i, val);
1146                 }
1147                 goto finish;
1148         }
1149
1150         case STRING_ENCODING_WIDE: {
1151                 elem_type = ir_type_wchar_t;
1152
1153                 ir_mode *const mode = get_type_mode(elem_type);
1154                 char const    *p    = value->begin;
1155                 for (size_t i = 0; i < slen; ++i) {
1156                         assert(p <= value->begin + value->size);
1157                         utf32             v   = read_utf8_char(&p);
1158                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1159                         ir_initializer_t *val = create_initializer_tarval(tv);
1160                         set_initializer_compound_value(initializer, i, val);
1161                 }
1162                 goto finish;
1163         }
1164         }
1165         panic("invalid string encoding");
1166
1167 finish:;
1168         ir_type *const type = new_type_array(1, elem_type);
1169         set_array_bounds_int(type, 0, 0, slen);
1170         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1171         set_type_state(      type, layout_fixed);
1172
1173         ir_type   *const global_type = get_glob_type();
1174         ident     *const id          = id_unique(id_prefix);
1175         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1176         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1177         set_entity_ld_ident(   entity, id);
1178         set_entity_visibility( entity, ir_visibility_private);
1179         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1180         set_entity_initializer(entity, initializer);
1181
1182         return create_symconst(dbgi, entity);
1183 }
1184
1185 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1186 {
1187         assert(type->kind == TYPE_ATOMIC);
1188         atomic_type_kind_t akind = type->atomic.akind;
1189
1190         ir_mode    *const mode = atomic_modes[akind];
1191         char const *const str  = literal->value.begin;
1192         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1193         if (tv == tarval_bad)
1194                 return false;
1195
1196         literal->base.type    = type;
1197         literal->target_value = tv;
1198         return true;
1199 }
1200
1201 void determine_literal_type(literal_expression_t *const literal)
1202 {
1203         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1204
1205         /* -1: signed only, 0: any, 1: unsigned only */
1206         int const sign =
1207                 !is_type_signed(literal->base.type) ? 1 :
1208                 literal->value.begin[0] == '0'      ? 0 :
1209                 -1; /* Decimal literals only try signed types. */
1210
1211         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1212         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1213
1214         if (try_create_integer(literal, literal->base.type))
1215                 goto finished;
1216
1217         /* now try if the constant is small enough for some types */
1218         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1219                 goto finished;
1220         if (sign <= 0 && try_create_integer(literal, type_long))
1221                 goto finished;
1222         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1223                 goto finished;
1224         /* last try? then we should not report tarval_bad */
1225         if (sign < 0)
1226                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1227         if (sign <= 0 && try_create_integer(literal, type_long_long))
1228                 goto finished;
1229
1230         /* last try */
1231         assert(sign >= 0);
1232         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1233         bool res = try_create_integer(literal, type_unsigned_long_long);
1234         if (!res)
1235                 panic("internal error when parsing number literal");
1236
1237 finished:
1238         tarval_set_integer_overflow_mode(old_mode);
1239 }
1240
1241 /**
1242  * Creates a Const node representing a constant.
1243  */
1244 static ir_node *literal_to_firm(const literal_expression_t *literal)
1245 {
1246         type_t     *type   = skip_typeref(literal->base.type);
1247         ir_mode    *mode   = get_ir_mode_storage(type);
1248         const char *string = literal->value.begin;
1249         size_t      size   = literal->value.size;
1250         ir_tarval  *tv;
1251
1252         switch (literal->base.kind) {
1253         case EXPR_LITERAL_INTEGER:
1254                 assert(literal->target_value != NULL);
1255                 tv = literal->target_value;
1256                 break;
1257
1258         case EXPR_LITERAL_FLOATINGPOINT:
1259                 tv = new_tarval_from_str(string, size, mode);
1260                 break;
1261
1262         case EXPR_LITERAL_BOOLEAN:
1263                 if (string[0] == 't') {
1264                         tv = get_mode_one(mode);
1265                 } else {
1266                         assert(string[0] == 'f');
1267         case EXPR_LITERAL_MS_NOOP:
1268                         tv = get_mode_null(mode);
1269                 }
1270                 break;
1271
1272         default:
1273                 panic("invalid literal kind");
1274         }
1275
1276         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1277         ir_node  *res        = new_d_Const(dbgi, tv);
1278         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1279         return create_conv(dbgi, res, mode_arith);
1280 }
1281
1282 /**
1283  * Creates a Const node representing a character constant.
1284  */
1285 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1286 {
1287         type_t     *type   = skip_typeref(literal->base.type);
1288         ir_mode    *mode   = get_ir_mode_storage(type);
1289         const char *string = literal->value.begin;
1290         size_t      size   = literal->value.size;
1291         ir_tarval  *tv;
1292
1293         switch (literal->value.encoding) {
1294         case STRING_ENCODING_WIDE: {
1295                 utf32  v = read_utf8_char(&string);
1296                 char   buf[128];
1297                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1298
1299                 tv = new_tarval_from_str(buf, len, mode);
1300                 break;
1301         }
1302
1303         case STRING_ENCODING_CHAR: {
1304                 long long int v;
1305                 bool char_is_signed
1306                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1307                 if (size == 1 && char_is_signed) {
1308                         v = (signed char)string[0];
1309                 } else {
1310                         v = 0;
1311                         for (size_t i = 0; i < size; ++i) {
1312                                 v = (v << 8) | ((unsigned char)string[i]);
1313                         }
1314                 }
1315                 char   buf[128];
1316                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1317
1318                 tv = new_tarval_from_str(buf, len, mode);
1319                 break;
1320         }
1321
1322         default:
1323                 panic("invalid literal kind");
1324         }
1325
1326         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1327         ir_node  *res        = new_d_Const(dbgi, tv);
1328         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1329         return create_conv(dbgi, res, mode_arith);
1330 }
1331
1332 /*
1333  * Allocate an area of size bytes aligned at alignment
1334  * at a frame type.
1335  */
1336 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1337 {
1338         static unsigned area_cnt = 0;
1339         char buf[32];
1340
1341         ir_type *tp = new_type_array(1, ir_type_char);
1342         set_array_bounds_int(tp, 0, 0, size);
1343         set_type_alignment_bytes(tp, alignment);
1344
1345         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1346         ident *name = new_id_from_str(buf);
1347         ir_entity *area = new_entity(frame_type, name, tp);
1348
1349         /* mark this entity as compiler generated */
1350         set_entity_compiler_generated(area, 1);
1351         return area;
1352 }
1353
1354 /**
1355  * Return a node representing a trampoline region
1356  * for a given function entity.
1357  *
1358  * @param dbgi    debug info
1359  * @param entity  the function entity
1360  */
1361 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1362 {
1363         ir_entity *region = NULL;
1364         int        i;
1365
1366         if (current_trampolines != NULL) {
1367                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1368                         if (current_trampolines[i].function == entity) {
1369                                 region = current_trampolines[i].region;
1370                                 break;
1371                         }
1372                 }
1373         } else {
1374                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1375         }
1376         ir_graph *irg = current_ir_graph;
1377         if (region == NULL) {
1378                 /* create a new region */
1379                 ir_type           *frame_tp = get_irg_frame_type(irg);
1380                 trampoline_region  reg;
1381                 reg.function = entity;
1382
1383                 reg.region   = alloc_trampoline(frame_tp,
1384                                                 be_params->trampoline_size,
1385                                                 be_params->trampoline_align);
1386                 ARR_APP1(trampoline_region, current_trampolines, reg);
1387                 region = reg.region;
1388         }
1389         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1390                                region);
1391 }
1392
1393 /**
1394  * Creates a trampoline for a function represented by an entity.
1395  *
1396  * @param dbgi    debug info
1397  * @param mode    the (reference) mode for the function address
1398  * @param entity  the function entity
1399  */
1400 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1401                                   ir_entity *entity)
1402 {
1403         assert(entity != NULL);
1404         ir_node *in[3];
1405         in[0] = get_trampoline_region(dbgi, entity);
1406         in[1] = create_symconst(dbgi, entity);
1407         in[2] = get_irg_frame(current_ir_graph);
1408
1409         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1410         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1411         return new_Proj(irn, mode, pn_Builtin_max+1);
1412 }
1413
1414 /**
1415  * Dereference an address.
1416  *
1417  * @param dbgi  debug info
1418  * @param type  the type of the dereferenced result (the points_to type)
1419  * @param addr  the address to dereference
1420  */
1421 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1422                                       ir_node *const addr)
1423 {
1424         type_t *skipped = skip_typeref(type);
1425         if (is_type_incomplete(skipped))
1426                 return addr;
1427
1428         ir_type *irtype = get_ir_type(skipped);
1429         if (is_compound_type(irtype)
1430             || is_Method_type(irtype)
1431             || is_Array_type(irtype)) {
1432                 return addr;
1433         }
1434
1435         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1436                                   ? cons_volatile : cons_none;
1437         ir_mode *const mode     = get_type_mode(irtype);
1438         ir_node *const memory   = get_store();
1439         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1440         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1441         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1442
1443         set_store(load_mem);
1444
1445         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1446         return create_conv(dbgi, load_res, mode_arithmetic);
1447 }
1448
1449 /**
1450  * Returns the correct base address depending on whether it is a parameter or a
1451  * normal local variable.
1452  */
1453 static ir_node *get_local_frame(ir_entity *const ent)
1454 {
1455         ir_graph      *const irg   = current_ir_graph;
1456         const ir_type *const owner = get_entity_owner(ent);
1457         if (owner == current_outer_frame) {
1458                 assert(current_static_link != NULL);
1459                 return current_static_link;
1460         } else {
1461                 return get_irg_frame(irg);
1462         }
1463 }
1464
1465 /**
1466  * Keep all memory edges of the given block.
1467  */
1468 static void keep_all_memory(ir_node *block)
1469 {
1470         ir_node *old = get_cur_block();
1471
1472         set_cur_block(block);
1473         keep_alive(get_store());
1474         /* TODO: keep all memory edges from restricted pointers */
1475         set_cur_block(old);
1476 }
1477
1478 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1479 {
1480         entity_t *entity = ref->entity;
1481         if (entity->enum_value.tv == NULL) {
1482                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1483                 assert(type->kind == TYPE_ENUM);
1484                 determine_enum_values(&type->enumt);
1485         }
1486
1487         return new_Const(entity->enum_value.tv);
1488 }
1489
1490 static ir_node *reference_addr(const reference_expression_t *ref)
1491 {
1492         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1493         entity_t *entity = ref->entity;
1494         assert(is_declaration(entity));
1495
1496         if (entity->kind == ENTITY_FUNCTION
1497             && entity->function.btk != BUILTIN_NONE) {
1498                 ir_entity *irentity = get_function_entity(entity, NULL);
1499                 /* for gcc compatibility we have to produce (dummy) addresses for some
1500                  * builtins which don't have entities */
1501                 if (irentity == NULL) {
1502                         source_position_t const *const pos = &ref->base.source_position;
1503                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1504
1505                         /* simply create a NULL pointer */
1506                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1507                         ir_node  *res  = new_Const(get_mode_null(mode));
1508
1509                         return res;
1510                 }
1511         }
1512
1513         switch((declaration_kind_t) entity->declaration.kind) {
1514         case DECLARATION_KIND_UNKNOWN:
1515                 break;
1516         case DECLARATION_KIND_PARAMETER:
1517         case DECLARATION_KIND_LOCAL_VARIABLE:
1518                 /* you can store to a local variable (so we don't panic but return NULL
1519                  * as an indicator for no real address) */
1520                 return NULL;
1521         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1522                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1523                 return addr;
1524         }
1525
1526         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1527         case DECLARATION_KIND_PARAMETER_ENTITY: {
1528                 ir_entity *irentity = entity->variable.v.entity;
1529                 ir_node   *frame    = get_local_frame(irentity);
1530                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1531                 return sel;
1532         }
1533
1534         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1535                 return entity->variable.v.vla_base;
1536
1537         case DECLARATION_KIND_FUNCTION: {
1538                 return create_symconst(dbgi, entity->function.irentity);
1539         }
1540
1541         case DECLARATION_KIND_INNER_FUNCTION: {
1542                 type_t  *const type = skip_typeref(entity->declaration.type);
1543                 ir_mode *const mode = get_ir_mode_storage(type);
1544                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1545                         /* inner function not using the closure */
1546                         return create_symconst(dbgi, entity->function.irentity);
1547                 } else {
1548                         /* need trampoline here */
1549                         return create_trampoline(dbgi, mode, entity->function.irentity);
1550                 }
1551         }
1552
1553         case DECLARATION_KIND_COMPOUND_MEMBER:
1554                 panic("not implemented reference type");
1555         }
1556
1557         panic("reference to declaration with unknown type");
1558 }
1559
1560 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1561 {
1562         dbg_info *const dbgi   = get_dbg_info(&ref->base.source_position);
1563         entity_t *const entity = ref->entity;
1564         assert(is_declaration(entity));
1565
1566         switch ((declaration_kind_t)entity->declaration.kind) {
1567         case DECLARATION_KIND_LOCAL_VARIABLE:
1568         case DECLARATION_KIND_PARAMETER: {
1569                 type_t  *const type  = skip_typeref(entity->declaration.type);
1570                 ir_mode *const mode  = get_ir_mode_storage(type);
1571                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1572                 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1573         }
1574
1575         default: {
1576                 ir_node *const addr = reference_addr(ref);
1577                 return deref_address(dbgi, entity->declaration.type, addr);
1578         }
1579         }
1580 }
1581
1582 /**
1583  * Transform calls to builtin functions.
1584  */
1585 static ir_node *process_builtin_call(const call_expression_t *call)
1586 {
1587         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1588
1589         assert(call->function->kind == EXPR_REFERENCE);
1590         reference_expression_t *builtin = &call->function->reference;
1591
1592         type_t *expr_type = skip_typeref(builtin->base.type);
1593         assert(is_type_pointer(expr_type));
1594
1595         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1596
1597         switch (builtin->entity->function.btk) {
1598         case BUILTIN_NONE:
1599                 break;
1600         case BUILTIN_ALLOCA: {
1601                 expression_t *argument = call->arguments->expression;
1602                 ir_node      *size     = expression_to_firm(argument);
1603
1604                 ir_node *store  = get_store();
1605                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1606                                               stack_alloc);
1607                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1608                 set_store(proj_m);
1609                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1610
1611                 return res;
1612         }
1613         case BUILTIN_INF: {
1614                 type_t    *type = function_type->function.return_type;
1615                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1616                 ir_tarval *tv   = get_mode_infinite(mode);
1617                 ir_node   *res  = new_d_Const(dbgi, tv);
1618                 return res;
1619         }
1620         case BUILTIN_NAN: {
1621                 /* Ignore string for now... */
1622                 assert(is_type_function(function_type));
1623                 type_t    *type = function_type->function.return_type;
1624                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1625                 ir_tarval *tv   = get_mode_NAN(mode);
1626                 ir_node   *res  = new_d_Const(dbgi, tv);
1627                 return res;
1628         }
1629         case BUILTIN_EXPECT: {
1630                 expression_t *argument = call->arguments->expression;
1631                 return _expression_to_firm(argument);
1632         }
1633         case BUILTIN_VA_END:
1634                 /* evaluate the argument of va_end for its side effects */
1635                 _expression_to_firm(call->arguments->expression);
1636                 return NULL;
1637         case BUILTIN_OBJECT_SIZE: {
1638                 /* determine value of "type" */
1639                 expression_t *type_expression = call->arguments->next->expression;
1640                 long          type_val        = fold_constant_to_int(type_expression);
1641                 type_t       *type            = function_type->function.return_type;
1642                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1643                 /* just produce a "I don't know" result */
1644                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1645                                                 get_mode_minus_one(mode);
1646
1647                 return new_d_Const(dbgi, result);
1648         }
1649         case BUILTIN_ROTL: {
1650                 ir_node *val  = expression_to_firm(call->arguments->expression);
1651                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1652                 ir_mode *mode = get_irn_mode(val);
1653                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1654                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1655         }
1656         case BUILTIN_ROTR: {
1657                 ir_node *val  = expression_to_firm(call->arguments->expression);
1658                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1659                 ir_mode *mode = get_irn_mode(val);
1660                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1661                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1662                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1663                 return new_d_Rotl(dbgi, val, sub, mode);
1664         }
1665         case BUILTIN_FIRM:
1666                 break;
1667         case BUILTIN_LIBC:
1668         case BUILTIN_LIBC_CHECK:
1669                 panic("builtin did not produce an entity");
1670         }
1671         panic("invalid builtin");
1672 }
1673
1674 /**
1675  * Transform a call expression.
1676  * Handles some special cases, like alloca() calls, which must be resolved
1677  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1678  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1679  * handled right...
1680  */
1681 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1682 {
1683         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1684         assert(currently_reachable());
1685
1686         expression_t   *function = call->function;
1687         ir_node        *callee   = NULL;
1688         bool            firm_builtin = false;
1689         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1690         if (function->kind == EXPR_REFERENCE) {
1691                 const reference_expression_t *ref    = &function->reference;
1692                 entity_t                     *entity = ref->entity;
1693
1694                 if (entity->kind == ENTITY_FUNCTION) {
1695                         builtin_kind_t builtin = entity->function.btk;
1696                         if (builtin == BUILTIN_FIRM) {
1697                                 firm_builtin = true;
1698                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1699                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1700                                    && builtin != BUILTIN_LIBC_CHECK) {
1701                                 return process_builtin_call(call);
1702                         }
1703                 }
1704         }
1705         if (!firm_builtin)
1706                 callee = expression_to_firm(function);
1707
1708         type_t *type = skip_typeref(function->base.type);
1709         assert(is_type_pointer(type));
1710         pointer_type_t *pointer_type = &type->pointer;
1711         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1712         assert(is_type_function(points_to));
1713         function_type_t *function_type = &points_to->function;
1714
1715         int      n_parameters    = 0;
1716         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1717         ir_type *new_method_type = NULL;
1718         if (function_type->variadic || function_type->unspecified_parameters) {
1719                 const call_argument_t *argument = call->arguments;
1720                 for ( ; argument != NULL; argument = argument->next) {
1721                         ++n_parameters;
1722                 }
1723
1724                 /* we need to construct a new method type matching the call
1725                  * arguments... */
1726                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1727                 int n_res       = get_method_n_ress(ir_method_type);
1728                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1729                 set_method_calling_convention(new_method_type,
1730                                get_method_calling_convention(ir_method_type));
1731                 set_method_additional_properties(new_method_type,
1732                                get_method_additional_properties(ir_method_type));
1733                 set_method_variadicity(new_method_type,
1734                                        get_method_variadicity(ir_method_type));
1735
1736                 for (int i = 0; i < n_res; ++i) {
1737                         set_method_res_type(new_method_type, i,
1738                                             get_method_res_type(ir_method_type, i));
1739                 }
1740                 argument = call->arguments;
1741                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1742                         expression_t *expression = argument->expression;
1743                         ir_type      *irtype     = get_ir_type(expression->base.type);
1744                         set_method_param_type(new_method_type, i, irtype);
1745                 }
1746                 ir_method_type = new_method_type;
1747         } else {
1748                 n_parameters = get_method_n_params(ir_method_type);
1749         }
1750
1751         ir_node *in[n_parameters];
1752
1753         const call_argument_t *argument = call->arguments;
1754         for (int n = 0; n < n_parameters; ++n) {
1755                 expression_t *expression = argument->expression;
1756                 ir_node      *arg_node   = expression_to_firm(expression);
1757
1758                 type_t *arg_type = skip_typeref(expression->base.type);
1759                 if (!is_type_compound(arg_type)) {
1760                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1761                         arg_node = create_conv(dbgi, arg_node, mode);
1762                 }
1763
1764                 in[n] = arg_node;
1765
1766                 argument = argument->next;
1767         }
1768
1769         ir_node *store;
1770         if (function_type->modifiers & DM_CONST) {
1771                 store = get_irg_no_mem(current_ir_graph);
1772         } else {
1773                 store = get_store();
1774         }
1775
1776         ir_node *node;
1777         type_t  *return_type = skip_typeref(function_type->return_type);
1778         ir_node *result      = NULL;
1779         if (firm_builtin) {
1780                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1781                                      ir_method_type);
1782                 if (! (function_type->modifiers & DM_CONST)) {
1783                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1784                         set_store(mem);
1785                 }
1786
1787                 if (!is_type_void(return_type)) {
1788                         assert(is_type_scalar(return_type));
1789                         ir_mode *mode = get_ir_mode_storage(return_type);
1790                         result = new_Proj(node, mode, pn_Builtin_max+1);
1791                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1792                         result              = create_conv(NULL, result, mode_arith);
1793                 }
1794         } else {
1795                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1796                 if (! (function_type->modifiers & DM_CONST)) {
1797                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1798                         set_store(mem);
1799                 }
1800
1801                 if (!is_type_void(return_type)) {
1802                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1803                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1804                         result                    = new_Proj(resproj, mode, 0);
1805                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1806                         result                    = create_conv(NULL, result, mode_arith);
1807                 }
1808         }
1809
1810         if (function_type->modifiers & DM_NORETURN) {
1811                 /* A dead end:  Keep the Call and the Block.  Also place all further
1812                  * nodes into a new and unreachable block. */
1813                 keep_alive(node);
1814                 keep_alive(get_cur_block());
1815                 ir_node *block = new_Block(0, NULL);
1816                 set_cur_block(block);
1817         }
1818
1819         return result;
1820 }
1821
1822 static ir_node *statement_to_firm(statement_t *statement);
1823 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1824
1825 static ir_node *expression_to_addr(const expression_t *expression);
1826 static ir_node *create_condition_evaluation(expression_t const *expression, jump_target *true_target, jump_target *false_target);
1827
1828 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1829                          ir_node *value)
1830 {
1831         if (!is_type_compound(type)) {
1832                 ir_mode *mode = get_ir_mode_storage(type);
1833                 value         = create_conv(dbgi, value, mode);
1834         }
1835
1836         ir_node *memory = get_store();
1837
1838         if (is_type_scalar(type)) {
1839                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1840                                       ? cons_volatile : cons_none;
1841                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1842                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1843                 set_store(store_mem);
1844         } else {
1845                 ir_type *irtype    = get_ir_type(type);
1846                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1847                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1848                 set_store(copyb_mem);
1849         }
1850 }
1851
1852 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1853 {
1854         ir_tarval *all_one   = get_mode_all_one(mode);
1855         int        mode_size = get_mode_size_bits(mode);
1856         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1857
1858         assert(offset >= 0);
1859         assert(size   >= 0);
1860         assert(offset + size <= mode_size);
1861         if (size == mode_size) {
1862                 return all_one;
1863         }
1864
1865         long       shiftr    = get_mode_size_bits(mode) - size;
1866         long       shiftl    = offset;
1867         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1868         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1869         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1870         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1871
1872         return mask1;
1873 }
1874
1875 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1876                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1877                 bool need_return)
1878 {
1879         ir_type *entity_type = get_entity_type(entity);
1880         ir_type *base_type   = get_primitive_base_type(entity_type);
1881         ir_mode *mode        = get_type_mode(base_type);
1882         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1883
1884         value = create_conv(dbgi, value, mode);
1885
1886         /* kill upper bits of value and shift to right position */
1887         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1888         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1889         unsigned  base_bits  = get_mode_size_bits(mode);
1890         unsigned  shiftwidth = base_bits - bitsize;
1891
1892         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1893         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1894
1895         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1896         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1897         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1898
1899         /* load current value */
1900         ir_node   *mem             = get_store();
1901         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1902                                           set_volatile ? cons_volatile : cons_none);
1903         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1904         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1905         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1906         ir_tarval *inv_mask        = tarval_not(shift_mask);
1907         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1908         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1909
1910         /* construct new value and store */
1911         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1912         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1913                                          set_volatile ? cons_volatile : cons_none);
1914         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1915         set_store(store_mem);
1916
1917         if (!need_return)
1918                 return NULL;
1919
1920         ir_node *res_shr;
1921         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1922         if (mode_is_signed(mode)) {
1923                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1924         } else {
1925                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1926         }
1927         return res_shr;
1928 }
1929
1930 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1931                                          ir_node *addr)
1932 {
1933         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
1934         entity_t *entity    = expression->compound_entry;
1935         type_t   *base_type = entity->declaration.type;
1936         ir_mode  *mode      = get_ir_mode_storage(base_type);
1937         ir_node  *mem       = get_store();
1938         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1939         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1940         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1941         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1942
1943         ir_mode  *amode     = mode;
1944         /* optimisation, since shifting in modes < machine_size is usually
1945          * less efficient */
1946         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1947                 amode = mode_uint;
1948         }
1949         unsigned amode_size = get_mode_size_bits(amode);
1950         load_res = create_conv(dbgi, load_res, amode);
1951
1952         set_store(load_mem);
1953
1954         /* kill upper bits */
1955         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1956         unsigned   bitoffset   = entity->compound_member.bit_offset;
1957         unsigned   bitsize     = entity->compound_member.bit_size;
1958         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1959         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1960         ir_node   *countl      = new_d_Const(dbgi, tvl);
1961         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1962
1963         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1964         assert(shift_bitsr <= amode_size);
1965         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1966         ir_node   *countr      = new_d_Const(dbgi, tvr);
1967         ir_node   *shiftr;
1968         if (mode_is_signed(mode)) {
1969                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1970         } else {
1971                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1972         }
1973
1974         type_t  *type    = expression->base.type;
1975         ir_mode *resmode = get_ir_mode_arithmetic(type);
1976         return create_conv(dbgi, shiftr, resmode);
1977 }
1978
1979 /* make sure the selected compound type is constructed */
1980 static void construct_select_compound(const select_expression_t *expression)
1981 {
1982         type_t *type = skip_typeref(expression->compound->base.type);
1983         if (is_type_pointer(type)) {
1984                 type = type->pointer.points_to;
1985         }
1986         (void) get_ir_type(type);
1987 }
1988
1989 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1990                                               ir_node *value, ir_node *addr)
1991 {
1992         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1993         type_t   *type = skip_typeref(expression->base.type);
1994
1995         if (!is_type_compound(type)) {
1996                 ir_mode  *mode = get_ir_mode_storage(type);
1997                 value          = create_conv(dbgi, value, mode);
1998         }
1999
2000         if (expression->kind == EXPR_REFERENCE) {
2001                 const reference_expression_t *ref = &expression->reference;
2002
2003                 entity_t *entity = ref->entity;
2004                 assert(is_declaration(entity));
2005                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2006                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2007                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2008                         set_value(entity->variable.v.value_number, value);
2009                         return value;
2010                 }
2011         }
2012
2013         if (addr == NULL)
2014                 addr = expression_to_addr(expression);
2015         assert(addr != NULL);
2016
2017         if (expression->kind == EXPR_SELECT) {
2018                 const select_expression_t *select = &expression->select;
2019
2020                 construct_select_compound(select);
2021
2022                 entity_t *entity = select->compound_entry;
2023                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2024                 if (entity->compound_member.bitfield) {
2025                         ir_entity *irentity = entity->compound_member.entity;
2026                         bool       set_volatile
2027                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2028                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2029                                                        set_volatile, true);
2030                         return value;
2031                 }
2032         }
2033
2034         assign_value(dbgi, addr, type, value);
2035         return value;
2036 }
2037
2038 static void set_value_for_expression(const expression_t *expression,
2039                                      ir_node *value)
2040 {
2041         set_value_for_expression_addr(expression, value, NULL);
2042 }
2043
2044 static ir_node *get_value_from_lvalue(const expression_t *expression,
2045                                       ir_node *addr)
2046 {
2047         if (expression->kind == EXPR_REFERENCE) {
2048                 const reference_expression_t *ref = &expression->reference;
2049
2050                 entity_t *entity = ref->entity;
2051                 assert(entity->kind == ENTITY_VARIABLE
2052                                 || entity->kind == ENTITY_PARAMETER);
2053                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2054                 int value_number;
2055                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2056                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2057                         value_number = entity->variable.v.value_number;
2058                         assert(addr == NULL);
2059                         type_t  *type = skip_typeref(expression->base.type);
2060                         ir_mode *mode = get_ir_mode_storage(type);
2061                         ir_node *res  = get_value(value_number, mode);
2062                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2063                 }
2064         }
2065
2066         assert(addr != NULL);
2067         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2068
2069         ir_node *value;
2070         if (expression->kind == EXPR_SELECT &&
2071             expression->select.compound_entry->compound_member.bitfield) {
2072             construct_select_compound(&expression->select);
2073                 value = bitfield_extract_to_firm(&expression->select, addr);
2074         } else {
2075                 value = deref_address(dbgi, expression->base.type, addr);
2076         }
2077
2078         return value;
2079 }
2080
2081
2082 static ir_node *create_incdec(const unary_expression_t *expression)
2083 {
2084         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2085         const expression_t *value_expr = expression->value;
2086         ir_node            *addr       = expression_to_addr(value_expr);
2087         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2088
2089         type_t  *type = skip_typeref(expression->base.type);
2090         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2091
2092         ir_node *offset;
2093         if (is_type_pointer(type)) {
2094                 pointer_type_t *pointer_type = &type->pointer;
2095                 offset = get_type_size_node(pointer_type->points_to);
2096         } else {
2097                 assert(is_type_arithmetic(type));
2098                 offset = new_Const(get_mode_one(mode));
2099         }
2100
2101         ir_node *result;
2102         ir_node *store_value;
2103         switch(expression->base.kind) {
2104         case EXPR_UNARY_POSTFIX_INCREMENT:
2105                 result      = value;
2106                 store_value = new_d_Add(dbgi, value, offset, mode);
2107                 break;
2108         case EXPR_UNARY_POSTFIX_DECREMENT:
2109                 result      = value;
2110                 store_value = new_d_Sub(dbgi, value, offset, mode);
2111                 break;
2112         case EXPR_UNARY_PREFIX_INCREMENT:
2113                 result      = new_d_Add(dbgi, value, offset, mode);
2114                 store_value = result;
2115                 break;
2116         case EXPR_UNARY_PREFIX_DECREMENT:
2117                 result      = new_d_Sub(dbgi, value, offset, mode);
2118                 store_value = result;
2119                 break;
2120         default:
2121                 panic("no incdec expr");
2122         }
2123
2124         set_value_for_expression_addr(value_expr, store_value, addr);
2125
2126         return result;
2127 }
2128
2129 static bool is_local_variable(expression_t *expression)
2130 {
2131         if (expression->kind != EXPR_REFERENCE)
2132                 return false;
2133         reference_expression_t *ref_expr = &expression->reference;
2134         entity_t               *entity   = ref_expr->entity;
2135         if (entity->kind != ENTITY_VARIABLE)
2136                 return false;
2137         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2138         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2139 }
2140
2141 static ir_relation get_relation(const expression_kind_t kind)
2142 {
2143         switch(kind) {
2144         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2145         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2146         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2147         case EXPR_BINARY_ISLESS:
2148         case EXPR_BINARY_LESS:          return ir_relation_less;
2149         case EXPR_BINARY_ISLESSEQUAL:
2150         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2151         case EXPR_BINARY_ISGREATER:
2152         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2153         case EXPR_BINARY_ISGREATEREQUAL:
2154         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2155         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2156
2157         default:
2158                 break;
2159         }
2160         panic("trying to get ir_relation from non-comparison binexpr type");
2161 }
2162
2163 /**
2164  * Handle the assume optimizer hint: check if a Confirm
2165  * node can be created.
2166  *
2167  * @param dbi    debug info
2168  * @param expr   the IL assume expression
2169  *
2170  * we support here only some simple cases:
2171  *  - var rel const
2172  *  - const rel val
2173  *  - var rel var
2174  */
2175 static ir_node *handle_assume_compare(dbg_info *dbi,
2176                                       const binary_expression_t *expression)
2177 {
2178         expression_t *op1 = expression->left;
2179         expression_t *op2 = expression->right;
2180         entity_t     *var2, *var = NULL;
2181         ir_node      *res      = NULL;
2182         ir_relation   relation = get_relation(expression->base.kind);
2183
2184         if (is_local_variable(op1) && is_local_variable(op2)) {
2185                 var  = op1->reference.entity;
2186             var2 = op2->reference.entity;
2187
2188                 type_t  *const type = skip_typeref(var->declaration.type);
2189                 ir_mode *const mode = get_ir_mode_storage(type);
2190
2191                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2192                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2193
2194                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2195                 set_value(var2->variable.v.value_number, res);
2196
2197                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2198                 set_value(var->variable.v.value_number, res);
2199
2200                 return res;
2201         }
2202
2203         expression_t *con = NULL;
2204         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2205                 var = op1->reference.entity;
2206                 con = op2;
2207         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2208                 relation = get_inversed_relation(relation);
2209                 var = op2->reference.entity;
2210                 con = op1;
2211         }
2212
2213         if (var != NULL) {
2214                 type_t  *const type = skip_typeref(var->declaration.type);
2215                 ir_mode *const mode = get_ir_mode_storage(type);
2216
2217                 res = get_value(var->variable.v.value_number, mode);
2218                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2219                 set_value(var->variable.v.value_number, res);
2220         }
2221         return res;
2222 }
2223
2224 /**
2225  * Handle the assume optimizer hint.
2226  *
2227  * @param dbi    debug info
2228  * @param expr   the IL assume expression
2229  */
2230 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2231 {
2232         switch(expression->kind) {
2233         case EXPR_BINARY_EQUAL:
2234         case EXPR_BINARY_NOTEQUAL:
2235         case EXPR_BINARY_LESS:
2236         case EXPR_BINARY_LESSEQUAL:
2237         case EXPR_BINARY_GREATER:
2238         case EXPR_BINARY_GREATEREQUAL:
2239                 return handle_assume_compare(dbi, &expression->binary);
2240         default:
2241                 return NULL;
2242         }
2243 }
2244
2245 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2246                             type_t *from_type, type_t *type)
2247 {
2248         type = skip_typeref(type);
2249         if (is_type_void(type)) {
2250                 /* make sure firm type is constructed */
2251                 (void) get_ir_type(type);
2252                 return NULL;
2253         }
2254         if (!is_type_scalar(type)) {
2255                 /* make sure firm type is constructed */
2256                 (void) get_ir_type(type);
2257                 return value_node;
2258         }
2259
2260         from_type     = skip_typeref(from_type);
2261         ir_mode *mode = get_ir_mode_storage(type);
2262         /* check for conversion from / to __based types */
2263         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2264                 const variable_t *from_var = from_type->pointer.base_variable;
2265                 const variable_t *to_var   = type->pointer.base_variable;
2266                 if (from_var != to_var) {
2267                         if (from_var != NULL) {
2268                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2269                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2270                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2271                         }
2272                         if (to_var != NULL) {
2273                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2274                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2275                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2276                         }
2277                 }
2278         }
2279
2280         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2281                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2282                  * convert to mode_b so we only get a 0/1 value */
2283                 value_node = create_conv(dbgi, value_node, mode_b);
2284         }
2285
2286         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2287         ir_node *node       = create_conv(dbgi, value_node, mode);
2288         node                = create_conv(dbgi, node, mode_arith);
2289
2290         return node;
2291 }
2292
2293 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2294 {
2295         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2296         type_t   *type = skip_typeref(expression->base.type);
2297
2298         const expression_t *value = expression->value;
2299
2300         switch(expression->base.kind) {
2301         case EXPR_UNARY_TAKE_ADDRESS:
2302                 return expression_to_addr(value);
2303
2304         case EXPR_UNARY_NEGATE: {
2305                 ir_node *value_node = expression_to_firm(value);
2306                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2307                 return new_d_Minus(dbgi, value_node, mode);
2308         }
2309         case EXPR_UNARY_PLUS:
2310                 return expression_to_firm(value);
2311         case EXPR_UNARY_BITWISE_NEGATE: {
2312                 ir_node *value_node = expression_to_firm(value);
2313                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2314                 return new_d_Not(dbgi, value_node, mode);
2315         }
2316         case EXPR_UNARY_NOT: {
2317                 ir_node *value_node = _expression_to_firm(value);
2318                 value_node          = create_conv(dbgi, value_node, mode_b);
2319                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2320                 return res;
2321         }
2322         case EXPR_UNARY_DEREFERENCE: {
2323                 ir_node *value_node = expression_to_firm(value);
2324                 type_t  *value_type = skip_typeref(value->base.type);
2325                 assert(is_type_pointer(value_type));
2326
2327                 /* check for __based */
2328                 const variable_t *const base_var = value_type->pointer.base_variable;
2329                 if (base_var != NULL) {
2330                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2331                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2332                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2333                 }
2334                 type_t  *points_to  = value_type->pointer.points_to;
2335                 return deref_address(dbgi, points_to, value_node);
2336         }
2337         case EXPR_UNARY_POSTFIX_INCREMENT:
2338         case EXPR_UNARY_POSTFIX_DECREMENT:
2339         case EXPR_UNARY_PREFIX_INCREMENT:
2340         case EXPR_UNARY_PREFIX_DECREMENT:
2341                 return create_incdec(expression);
2342         case EXPR_UNARY_CAST: {
2343                 ir_node *value_node = expression_to_firm(value);
2344                 type_t  *from_type  = value->base.type;
2345                 return create_cast(dbgi, value_node, from_type, type);
2346         }
2347         case EXPR_UNARY_ASSUME:
2348                 return handle_assume(dbgi, value);
2349
2350         default:
2351                 break;
2352         }
2353         panic("invalid unary expression type");
2354 }
2355
2356 /**
2357  * produces a 0/1 depending of the value of a mode_b node
2358  */
2359 static ir_node *produce_condition_result(const expression_t *expression,
2360                                          ir_mode *mode, dbg_info *dbgi)
2361 {
2362         jump_target true_target;
2363         jump_target false_target;
2364         init_jump_target(&true_target,  NULL);
2365         init_jump_target(&false_target, NULL);
2366         create_condition_evaluation(expression, &true_target, &false_target);
2367
2368         ir_node    *val = NULL;
2369         jump_target exit_target;
2370         init_jump_target(&exit_target, NULL);
2371
2372         if (enter_jump_target(&true_target)) {
2373                 val = new_Const(get_mode_one(mode));
2374                 jump_to_target(&exit_target);
2375         }
2376
2377         if (enter_jump_target(&false_target)) {
2378                 ir_node *const zero = new_Const(get_mode_null(mode));
2379                 jump_to_target(&exit_target);
2380                 if (val) {
2381                         ir_node *const in[] = { val, zero };
2382                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2383                 } else {
2384                         val = zero;
2385                 }
2386         }
2387
2388         if (!enter_jump_target(&exit_target)) {
2389                 set_cur_block(new_Block(0, NULL));
2390                 val = new_Unknown(mode);
2391         }
2392         return val;
2393 }
2394
2395 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2396                 ir_node *value, type_t *type)
2397 {
2398         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2399         assert(is_type_pointer(type));
2400         pointer_type_t *const pointer_type = &type->pointer;
2401         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2402         ir_node        *      elem_size    = get_type_size_node(points_to);
2403         elem_size                          = create_conv(dbgi, elem_size, mode);
2404         value                              = create_conv(dbgi, value,     mode);
2405         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2406         return mul;
2407 }
2408
2409 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2410                           ir_node *left, ir_node *right)
2411 {
2412         ir_mode  *mode;
2413         type_t   *type_left  = skip_typeref(expression->left->base.type);
2414         type_t   *type_right = skip_typeref(expression->right->base.type);
2415
2416         expression_kind_t kind = expression->base.kind;
2417
2418         switch (kind) {
2419         case EXPR_BINARY_SHIFTLEFT:
2420         case EXPR_BINARY_SHIFTRIGHT:
2421         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2422         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2423                 mode  = get_ir_mode_arithmetic(expression->base.type);
2424                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2425                 break;
2426
2427         case EXPR_BINARY_SUB:
2428                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2429                         const pointer_type_t *const ptr_type = &type_left->pointer;
2430
2431                         mode = get_ir_mode_arithmetic(expression->base.type);
2432                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2433                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2434                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2435                         ir_node *const no_mem    = new_NoMem();
2436                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2437                                                                                                    mode, op_pin_state_floats);
2438                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2439                 }
2440                 /* fallthrough */
2441         case EXPR_BINARY_SUB_ASSIGN:
2442                 if (is_type_pointer(type_left)) {
2443                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2444                         mode  = get_ir_mode_arithmetic(type_left);
2445                         break;
2446                 }
2447                 goto normal_node;
2448
2449         case EXPR_BINARY_ADD:
2450         case EXPR_BINARY_ADD_ASSIGN:
2451                 if (is_type_pointer(type_left)) {
2452                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2453                         mode  = get_ir_mode_arithmetic(type_left);
2454                         break;
2455                 } else if (is_type_pointer(type_right)) {
2456                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2457                         mode  = get_ir_mode_arithmetic(type_right);
2458                         break;
2459                 }
2460                 goto normal_node;
2461
2462         default:
2463 normal_node:
2464                 mode = get_ir_mode_arithmetic(type_right);
2465                 left = create_conv(dbgi, left, mode);
2466                 break;
2467         }
2468
2469         switch (kind) {
2470         case EXPR_BINARY_ADD_ASSIGN:
2471         case EXPR_BINARY_ADD:
2472                 return new_d_Add(dbgi, left, right, mode);
2473         case EXPR_BINARY_SUB_ASSIGN:
2474         case EXPR_BINARY_SUB:
2475                 return new_d_Sub(dbgi, left, right, mode);
2476         case EXPR_BINARY_MUL_ASSIGN:
2477         case EXPR_BINARY_MUL:
2478                 return new_d_Mul(dbgi, left, right, mode);
2479         case EXPR_BINARY_BITWISE_AND:
2480         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2481                 return new_d_And(dbgi, left, right, mode);
2482         case EXPR_BINARY_BITWISE_OR:
2483         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2484                 return new_d_Or(dbgi, left, right, mode);
2485         case EXPR_BINARY_BITWISE_XOR:
2486         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2487                 return new_d_Eor(dbgi, left, right, mode);
2488         case EXPR_BINARY_SHIFTLEFT:
2489         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2490                 return new_d_Shl(dbgi, left, right, mode);
2491         case EXPR_BINARY_SHIFTRIGHT:
2492         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2493                 if (mode_is_signed(mode)) {
2494                         return new_d_Shrs(dbgi, left, right, mode);
2495                 } else {
2496                         return new_d_Shr(dbgi, left, right, mode);
2497                 }
2498         case EXPR_BINARY_DIV:
2499         case EXPR_BINARY_DIV_ASSIGN: {
2500                 ir_node *pin = new_Pin(new_NoMem());
2501                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2502                                          op_pin_state_floats);
2503                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2504                 return res;
2505         }
2506         case EXPR_BINARY_MOD:
2507         case EXPR_BINARY_MOD_ASSIGN: {
2508                 ir_node *pin = new_Pin(new_NoMem());
2509                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2510                                          op_pin_state_floats);
2511                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2512                 return res;
2513         }
2514         default:
2515                 panic("unexpected expression kind");
2516         }
2517 }
2518
2519 static ir_node *create_lazy_op(const binary_expression_t *expression)
2520 {
2521         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2522         type_t   *type = skip_typeref(expression->base.type);
2523         ir_mode  *mode = get_ir_mode_arithmetic(type);
2524
2525         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2526                 bool val = fold_constant_to_bool(expression->left);
2527                 expression_kind_t ekind = expression->base.kind;
2528                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2529                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2530                         if (!val) {
2531                                 return new_Const(get_mode_null(mode));
2532                         }
2533                 } else {
2534                         if (val) {
2535                                 return new_Const(get_mode_one(mode));
2536                         }
2537                 }
2538
2539                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2540                         bool valr = fold_constant_to_bool(expression->right);
2541                         return create_Const_from_bool(mode, valr);
2542                 }
2543
2544                 return produce_condition_result(expression->right, mode, dbgi);
2545         }
2546
2547         return produce_condition_result((const expression_t*) expression, mode,
2548                                         dbgi);
2549 }
2550
2551 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2552                                             ir_node *right, ir_mode *mode);
2553
2554 static ir_node *create_assign_binop(const binary_expression_t *expression)
2555 {
2556         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2557         const expression_t *left_expr = expression->left;
2558         type_t             *type      = skip_typeref(left_expr->base.type);
2559         ir_node            *right     = expression_to_firm(expression->right);
2560         ir_node            *left_addr = expression_to_addr(left_expr);
2561         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2562         ir_node            *result    = create_op(dbgi, expression, left, right);
2563
2564         result = create_cast(dbgi, result, expression->right->base.type, type);
2565
2566         result = set_value_for_expression_addr(left_expr, result, left_addr);
2567
2568         if (!is_type_compound(type)) {
2569                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570                 result = create_conv(dbgi, result, mode_arithmetic);
2571         }
2572         return result;
2573 }
2574
2575 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2576 {
2577         expression_kind_t kind = expression->base.kind;
2578
2579         switch(kind) {
2580         case EXPR_BINARY_EQUAL:
2581         case EXPR_BINARY_NOTEQUAL:
2582         case EXPR_BINARY_LESS:
2583         case EXPR_BINARY_LESSEQUAL:
2584         case EXPR_BINARY_GREATER:
2585         case EXPR_BINARY_GREATEREQUAL:
2586         case EXPR_BINARY_ISGREATER:
2587         case EXPR_BINARY_ISGREATEREQUAL:
2588         case EXPR_BINARY_ISLESS:
2589         case EXPR_BINARY_ISLESSEQUAL:
2590         case EXPR_BINARY_ISLESSGREATER:
2591         case EXPR_BINARY_ISUNORDERED: {
2592                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2593                 ir_node    *left     = expression_to_firm(expression->left);
2594                 ir_node    *right    = expression_to_firm(expression->right);
2595                 ir_relation relation = get_relation(kind);
2596                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2597                 return cmp;
2598         }
2599         case EXPR_BINARY_ASSIGN: {
2600                 ir_node *addr  = expression_to_addr(expression->left);
2601                 ir_node *right = expression_to_firm(expression->right);
2602                 ir_node *res
2603                         = set_value_for_expression_addr(expression->left, right, addr);
2604
2605                 type_t  *type            = skip_typeref(expression->base.type);
2606                 if (!is_type_compound(type)) {
2607                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2608                         res                      = create_conv(NULL, res, mode_arithmetic);
2609                 }
2610                 return res;
2611         }
2612         case EXPR_BINARY_ADD:
2613         case EXPR_BINARY_SUB:
2614         case EXPR_BINARY_MUL:
2615         case EXPR_BINARY_DIV:
2616         case EXPR_BINARY_MOD:
2617         case EXPR_BINARY_BITWISE_AND:
2618         case EXPR_BINARY_BITWISE_OR:
2619         case EXPR_BINARY_BITWISE_XOR:
2620         case EXPR_BINARY_SHIFTLEFT:
2621         case EXPR_BINARY_SHIFTRIGHT:
2622         {
2623                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2624                 ir_node  *left  = expression_to_firm(expression->left);
2625                 ir_node  *right = expression_to_firm(expression->right);
2626                 return create_op(dbgi, expression, left, right);
2627         }
2628         case EXPR_BINARY_LOGICAL_AND:
2629         case EXPR_BINARY_LOGICAL_OR:
2630                 return create_lazy_op(expression);
2631         case EXPR_BINARY_COMMA:
2632                 /* create side effects of left side */
2633                 (void) expression_to_firm(expression->left);
2634                 return _expression_to_firm(expression->right);
2635
2636         case EXPR_BINARY_ADD_ASSIGN:
2637         case EXPR_BINARY_SUB_ASSIGN:
2638         case EXPR_BINARY_MUL_ASSIGN:
2639         case EXPR_BINARY_MOD_ASSIGN:
2640         case EXPR_BINARY_DIV_ASSIGN:
2641         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2642         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2643         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2644         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2645         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2646                 return create_assign_binop(expression);
2647         default:
2648                 panic("invalid binexpr type");
2649         }
2650 }
2651
2652 static ir_node *array_access_addr(const array_access_expression_t *expression)
2653 {
2654         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2655         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2656         ir_node  *offset      = expression_to_firm(expression->index);
2657         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2658         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2659         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2660
2661         return result;
2662 }
2663
2664 static ir_node *array_access_to_firm(
2665                 const array_access_expression_t *expression)
2666 {
2667         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2668         ir_node  *addr   = array_access_addr(expression);
2669         type_t   *type   = revert_automatic_type_conversion(
2670                         (const expression_t*) expression);
2671         type             = skip_typeref(type);
2672
2673         return deref_address(dbgi, type, addr);
2674 }
2675
2676 static long get_offsetof_offset(const offsetof_expression_t *expression)
2677 {
2678         type_t *orig_type = expression->type;
2679         long    offset    = 0;
2680
2681         designator_t *designator = expression->designator;
2682         for ( ; designator != NULL; designator = designator->next) {
2683                 type_t *type = skip_typeref(orig_type);
2684                 /* be sure the type is constructed */
2685                 (void) get_ir_type(type);
2686
2687                 if (designator->symbol != NULL) {
2688                         assert(is_type_compound(type));
2689                         symbol_t *symbol = designator->symbol;
2690
2691                         compound_t *compound = type->compound.compound;
2692                         entity_t   *iter     = compound->members.entities;
2693                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2694
2695                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2696                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2697                         offset += get_entity_offset(iter->compound_member.entity);
2698
2699                         orig_type = iter->declaration.type;
2700                 } else {
2701                         expression_t *array_index = designator->array_index;
2702                         assert(designator->array_index != NULL);
2703                         assert(is_type_array(type));
2704
2705                         long index         = fold_constant_to_int(array_index);
2706                         ir_type *arr_type  = get_ir_type(type);
2707                         ir_type *elem_type = get_array_element_type(arr_type);
2708                         long     elem_size = get_type_size_bytes(elem_type);
2709
2710                         offset += index * elem_size;
2711
2712                         orig_type = type->array.element_type;
2713                 }
2714         }
2715
2716         return offset;
2717 }
2718
2719 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2720 {
2721         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2722         long       offset = get_offsetof_offset(expression);
2723         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2724         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2725
2726         return new_d_Const(dbgi, tv);
2727 }
2728
2729 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2730                                      ir_entity *entity, type_t *type);
2731 static ir_initializer_t *create_ir_initializer(
2732                 const initializer_t *initializer, type_t *type);
2733
2734 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2735                                             initializer_t *initializer,
2736                                             type_t *type)
2737 {
2738         /* create the ir_initializer */
2739         PUSH_IRG(get_const_code_irg());
2740         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2741         POP_IRG();
2742
2743         ident     *const id          = id_unique("initializer.%u");
2744         ir_type   *const irtype      = get_ir_type(type);
2745         ir_type   *const global_type = get_glob_type();
2746         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2747         set_entity_ld_ident(entity, id);
2748         set_entity_visibility(entity, ir_visibility_private);
2749         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2750         set_entity_initializer(entity, irinitializer);
2751         return entity;
2752 }
2753
2754 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2755 {
2756         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2757         type_t        *type        = expression->type;
2758         initializer_t *initializer = expression->initializer;
2759
2760         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2761                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2762                 return create_symconst(dbgi, entity);
2763         } else {
2764                 /* create an entity on the stack */
2765                 ident   *const id     = id_unique("CompLit.%u");
2766                 ir_type *const irtype = get_ir_type(type);
2767                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2768
2769                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2770                 set_entity_ld_ident(entity, id);
2771
2772                 /* create initialisation code */
2773                 create_local_initializer(initializer, dbgi, entity, type);
2774
2775                 /* create a sel for the compound literal address */
2776                 ir_node *frame = get_irg_frame(current_ir_graph);
2777                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2778                 return sel;
2779         }
2780 }
2781
2782 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2783 {
2784         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2785         type_t   *const type = expr->type;
2786         ir_node  *const addr = compound_literal_addr(expr);
2787         return deref_address(dbgi, type, addr);
2788 }
2789
2790 /**
2791  * Transform a sizeof expression into Firm code.
2792  */
2793 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2794 {
2795         type_t *const type = skip_typeref(expression->type);
2796         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2797         if (is_type_array(type) && type->array.is_vla
2798                         && expression->tp_expression != NULL) {
2799                 expression_to_firm(expression->tp_expression);
2800         }
2801
2802         return get_type_size_node(type);
2803 }
2804
2805 static entity_t *get_expression_entity(const expression_t *expression)
2806 {
2807         if (expression->kind != EXPR_REFERENCE)
2808                 return NULL;
2809
2810         return expression->reference.entity;
2811 }
2812
2813 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2814 {
2815         switch(entity->kind) {
2816         case DECLARATION_KIND_CASES:
2817                 return entity->declaration.alignment;
2818         case ENTITY_STRUCT:
2819         case ENTITY_UNION:
2820                 return entity->compound.alignment;
2821         case ENTITY_TYPEDEF:
2822                 return entity->typedefe.alignment;
2823         default:
2824                 break;
2825         }
2826         return 0;
2827 }
2828
2829 /**
2830  * Transform an alignof expression into Firm code.
2831  */
2832 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2833 {
2834         unsigned alignment = 0;
2835
2836         const expression_t *tp_expression = expression->tp_expression;
2837         if (tp_expression != NULL) {
2838                 entity_t *entity = get_expression_entity(tp_expression);
2839                 if (entity != NULL) {
2840                         alignment = get_cparser_entity_alignment(entity);
2841                 }
2842         }
2843
2844         if (alignment == 0) {
2845                 type_t *type = expression->type;
2846                 alignment = get_type_alignment(type);
2847         }
2848
2849         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2850         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2851         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2852         return new_d_Const(dbgi, tv);
2853 }
2854
2855 static void init_ir_types(void);
2856
2857 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2858 {
2859         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2860
2861         bool constant_folding_old = constant_folding;
2862         constant_folding = true;
2863         int old_optimize         = get_optimize();
2864         int old_constant_folding = get_opt_constant_folding();
2865         set_optimize(1);
2866         set_opt_constant_folding(1);
2867
2868         init_ir_types();
2869
2870         PUSH_IRG(get_const_code_irg());
2871         ir_node *const cnst = _expression_to_firm(expression);
2872         POP_IRG();
2873
2874         set_optimize(old_optimize);
2875         set_opt_constant_folding(old_constant_folding);
2876
2877         if (!is_Const(cnst)) {
2878                 panic("couldn't fold constant");
2879         }
2880
2881         constant_folding = constant_folding_old;
2882
2883         ir_tarval *const tv   = get_Const_tarval(cnst);
2884         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2885         return tarval_convert_to(tv, mode);
2886 }
2887
2888 /* this function is only used in parser.c, but it relies on libfirm functionality */
2889 bool constant_is_negative(const expression_t *expression)
2890 {
2891         ir_tarval *tv = fold_constant_to_tarval(expression);
2892         return tarval_is_negative(tv);
2893 }
2894
2895 long fold_constant_to_int(const expression_t *expression)
2896 {
2897         ir_tarval *tv = fold_constant_to_tarval(expression);
2898         if (!tarval_is_long(tv)) {
2899                 panic("result of constant folding is not integer");
2900         }
2901
2902         return get_tarval_long(tv);
2903 }
2904
2905 bool fold_constant_to_bool(const expression_t *expression)
2906 {
2907         ir_tarval *tv = fold_constant_to_tarval(expression);
2908         return !tarval_is_null(tv);
2909 }
2910
2911 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2912 {
2913         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2914
2915         /* first try to fold a constant condition */
2916         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2917                 bool val = fold_constant_to_bool(expression->condition);
2918                 if (val) {
2919                         expression_t *true_expression = expression->true_expression;
2920                         if (true_expression == NULL)
2921                                 true_expression = expression->condition;
2922                         return expression_to_firm(true_expression);
2923                 } else {
2924                         return expression_to_firm(expression->false_expression);
2925                 }
2926         }
2927
2928         jump_target true_target;
2929         jump_target false_target;
2930         init_jump_target(&true_target,  NULL);
2931         init_jump_target(&false_target, NULL);
2932         ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2933
2934         ir_node    *val = NULL;
2935         jump_target exit_target;
2936         init_jump_target(&exit_target, NULL);
2937
2938         if (enter_jump_target(&true_target)) {
2939                 if (expression->true_expression) {
2940                         val = expression_to_firm(expression->true_expression);
2941                 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2942                         val = cond_expr;
2943                 } else {
2944                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2945                          * comparison.  Generate a "1" as value for the true branch. */
2946                         val = new_Const(get_mode_one(mode_Is));
2947                 }
2948                 jump_to_target(&exit_target);
2949         }
2950
2951         if (enter_jump_target(&false_target)) {
2952                 ir_node *const false_val = expression_to_firm(expression->false_expression);
2953                 jump_to_target(&exit_target);
2954                 if (val) {
2955                         ir_node *const in[] = { val, false_val };
2956                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2957                 } else {
2958                         val = false_val;
2959                 }
2960         }
2961
2962         if (!enter_jump_target(&exit_target)) {
2963                 set_cur_block(new_Block(0, NULL));
2964                 type_t *const type = skip_typeref(expression->base.type);
2965                 if (!is_type_void(type))
2966                         val = new_Unknown(get_ir_mode_arithmetic(type));
2967         }
2968         return val;
2969 }
2970
2971 /**
2972  * Returns an IR-node representing the address of a field.
2973  */
2974 static ir_node *select_addr(const select_expression_t *expression)
2975 {
2976         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2977
2978         construct_select_compound(expression);
2979
2980         ir_node *compound_addr = expression_to_firm(expression->compound);
2981
2982         entity_t *entry = expression->compound_entry;
2983         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2984         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2985
2986         if (constant_folding) {
2987                 ir_mode *mode      = get_irn_mode(compound_addr);
2988                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2989                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2990                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2991         } else {
2992                 ir_entity *irentity = entry->compound_member.entity;
2993                 assert(irentity != NULL);
2994                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2995         }
2996 }
2997
2998 static ir_node *select_to_firm(const select_expression_t *expression)
2999 {
3000         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3001         ir_node  *addr = select_addr(expression);
3002         type_t   *type = revert_automatic_type_conversion(
3003                         (const expression_t*) expression);
3004         type           = skip_typeref(type);
3005
3006         entity_t *entry = expression->compound_entry;
3007         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3008
3009         if (entry->compound_member.bitfield) {
3010                 return bitfield_extract_to_firm(expression, addr);
3011         }
3012
3013         return deref_address(dbgi, type, addr);
3014 }
3015
3016 /* Values returned by __builtin_classify_type. */
3017 typedef enum gcc_type_class
3018 {
3019         no_type_class = -1,
3020         void_type_class,
3021         integer_type_class,
3022         char_type_class,
3023         enumeral_type_class,
3024         boolean_type_class,
3025         pointer_type_class,
3026         reference_type_class,
3027         offset_type_class,
3028         real_type_class,
3029         complex_type_class,
3030         function_type_class,
3031         method_type_class,
3032         record_type_class,
3033         union_type_class,
3034         array_type_class,
3035         string_type_class,
3036         set_type_class,
3037         file_type_class,
3038         lang_type_class
3039 } gcc_type_class;
3040
3041 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3042 {
3043         type_t *type = expr->type_expression->base.type;
3044
3045         /* FIXME gcc returns different values depending on whether compiling C or C++
3046          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3047         gcc_type_class tc;
3048         for (;;) {
3049                 type = skip_typeref(type);
3050                 switch (type->kind) {
3051                         case TYPE_ATOMIC: {
3052                                 const atomic_type_t *const atomic_type = &type->atomic;
3053                                 switch (atomic_type->akind) {
3054                                         /* gcc cannot do that */
3055                                         case ATOMIC_TYPE_VOID:
3056                                                 tc = void_type_class;
3057                                                 goto make_const;
3058
3059                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3060                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3061                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3062                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3063                                         case ATOMIC_TYPE_SHORT:
3064                                         case ATOMIC_TYPE_USHORT:
3065                                         case ATOMIC_TYPE_INT:
3066                                         case ATOMIC_TYPE_UINT:
3067                                         case ATOMIC_TYPE_LONG:
3068                                         case ATOMIC_TYPE_ULONG:
3069                                         case ATOMIC_TYPE_LONGLONG:
3070                                         case ATOMIC_TYPE_ULONGLONG:
3071                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3072                                                 tc = integer_type_class;
3073                                                 goto make_const;
3074
3075                                         case ATOMIC_TYPE_FLOAT:
3076                                         case ATOMIC_TYPE_DOUBLE:
3077                                         case ATOMIC_TYPE_LONG_DOUBLE:
3078                                                 tc = real_type_class;
3079                                                 goto make_const;
3080                                 }
3081                                 panic("Unexpected atomic type.");
3082                         }
3083
3084                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3085                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3086                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3087                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3088                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3089                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3090                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3091
3092                         /* gcc handles this as integer */
3093                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3094
3095                         /* gcc classifies the referenced type */
3096                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3097
3098                         /* typedef/typeof should be skipped already */
3099                         case TYPE_TYPEDEF:
3100                         case TYPE_TYPEOF:
3101                         case TYPE_ERROR:
3102                                 break;
3103                 }
3104                 panic("unexpected type.");
3105         }
3106
3107 make_const:;
3108         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3109         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3110         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3111         return new_d_Const(dbgi, tv);
3112 }
3113
3114 static ir_node *function_name_to_firm(
3115                 const funcname_expression_t *const expr)
3116 {
3117         switch(expr->kind) {
3118         case FUNCNAME_FUNCTION:
3119         case FUNCNAME_PRETTY_FUNCTION:
3120         case FUNCNAME_FUNCDNAME:
3121                 if (current_function_name == NULL) {
3122                         source_position_t const *const src_pos = &expr->base.source_position;
3123                         char              const *const name    = current_function_entity->base.symbol->string;
3124                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3125                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3126                 }
3127                 return current_function_name;
3128         case FUNCNAME_FUNCSIG:
3129                 if (current_funcsig == NULL) {
3130                         source_position_t const *const src_pos = &expr->base.source_position;
3131                         ir_entity               *const ent     = get_irg_entity(current_ir_graph);
3132                         char              const *const name    = get_entity_ld_name(ent);
3133                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3134                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3135                 }
3136                 return current_funcsig;
3137         }
3138         panic("Unsupported function name");
3139 }
3140
3141 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3142 {
3143         statement_t *statement = expr->statement;
3144
3145         assert(statement->kind == STATEMENT_COMPOUND);
3146         return compound_statement_to_firm(&statement->compound);
3147 }
3148
3149 static ir_node *va_start_expression_to_firm(
3150         const va_start_expression_t *const expr)
3151 {
3152         ir_entity *param_ent = current_vararg_entity;
3153         if (param_ent == NULL) {
3154                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3155                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3156                 ir_type *const param_type  = get_unknown_type();
3157                 param_ent = new_parameter_entity(frame_type, n, param_type);
3158                 current_vararg_entity = param_ent;
3159         }
3160
3161         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3162         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3163         ir_node  *const no_mem  = new_NoMem();
3164         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3165
3166         set_value_for_expression(expr->ap, arg_sel);
3167
3168         return NULL;
3169 }
3170
3171 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3172 {
3173         type_t       *const type    = expr->base.type;
3174         expression_t *const ap_expr = expr->ap;
3175         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3176         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3177         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3178         ir_node      *const res     = deref_address(dbgi, type, ap);
3179
3180         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3181         ir_mode      *const mode    = get_irn_mode(cnst);
3182         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3183         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3184         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3185         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3186         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3187
3188         set_value_for_expression_addr(ap_expr, add, ap_addr);
3189
3190         return res;
3191 }
3192
3193 /**
3194  * Generate Firm for a va_copy expression.
3195  */
3196 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3197 {
3198         ir_node *const src = expression_to_firm(expr->src);
3199         set_value_for_expression(expr->dst, src);
3200         return NULL;
3201 }
3202
3203 static ir_node *dereference_addr(const unary_expression_t *const expression)
3204 {
3205         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3206         return expression_to_firm(expression->value);
3207 }
3208
3209 /**
3210  * Returns a IR-node representing an lvalue of the given expression.
3211  */
3212 static ir_node *expression_to_addr(const expression_t *expression)
3213 {
3214         switch(expression->kind) {
3215         case EXPR_ARRAY_ACCESS:
3216                 return array_access_addr(&expression->array_access);
3217         case EXPR_CALL:
3218                 return call_expression_to_firm(&expression->call);
3219         case EXPR_COMPOUND_LITERAL:
3220                 return compound_literal_addr(&expression->compound_literal);
3221         case EXPR_REFERENCE:
3222                 return reference_addr(&expression->reference);
3223         case EXPR_SELECT:
3224                 return select_addr(&expression->select);
3225         case EXPR_UNARY_DEREFERENCE:
3226                 return dereference_addr(&expression->unary);
3227         default:
3228                 break;
3229         }
3230         panic("trying to get address of non-lvalue");
3231 }
3232
3233 static ir_node *builtin_constant_to_firm(
3234                 const builtin_constant_expression_t *expression)
3235 {
3236         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3237         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3238         return create_Const_from_bool(mode, v);
3239 }
3240
3241 static ir_node *builtin_types_compatible_to_firm(
3242                 const builtin_types_compatible_expression_t *expression)
3243 {
3244         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3245         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3246         bool     const value = types_compatible(left, right);
3247         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3248         return create_Const_from_bool(mode, value);
3249 }
3250
3251 static void prepare_label_target(label_t *const label)
3252 {
3253         if (label->address_taken && !label->indirect_block) {
3254                 ir_node *const iblock = new_immBlock();
3255                 label->indirect_block = iblock;
3256                 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3257                 jump_from_block_to_target(&label->target, iblock);
3258         }
3259 }
3260
3261 /**
3262  * Pointer to a label.  This is used for the
3263  * GNU address-of-label extension.
3264  */
3265 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3266 {
3267         /* Beware: Might be called from create initializer with current_ir_graph
3268          * set to const_code_irg. */
3269         PUSH_IRG(current_function);
3270         prepare_label_target(label->label);
3271         POP_IRG();
3272
3273         symconst_symbol value;
3274         value.entity_p = create_Block_entity(label->label->indirect_block);
3275         dbg_info *const dbgi = get_dbg_info(&label->base.source_position);
3276         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3277 }
3278
3279 /**
3280  * creates firm nodes for an expression. The difference between this function
3281  * and expression_to_firm is, that this version might produce mode_b nodes
3282  * instead of mode_Is.
3283  */
3284 static ir_node *_expression_to_firm(expression_t const *const expr)
3285 {
3286 #ifndef NDEBUG
3287         if (!constant_folding) {
3288                 assert(!expr->base.transformed);
3289                 ((expression_t*)expr)->base.transformed = true;
3290         }
3291 #endif
3292
3293         switch (expr->kind) {
3294         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3295         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3296         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3297         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3298         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3299         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3300         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3301         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3302         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3303         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3304         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3305         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3306         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3307         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3308         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3309         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3310         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3311         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3312         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3313         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3314         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3315         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3316         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3317
3318         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3319
3320         case EXPR_ERROR: break;
3321         }
3322         panic("invalid expression");
3323 }
3324
3325 /**
3326  * Check if a given expression is a GNU __builtin_expect() call.
3327  */
3328 static bool is_builtin_expect(const expression_t *expression)
3329 {
3330         if (expression->kind != EXPR_CALL)
3331                 return false;
3332
3333         expression_t *function = expression->call.function;
3334         if (function->kind != EXPR_REFERENCE)
3335                 return false;
3336         reference_expression_t *ref = &function->reference;
3337         if (ref->entity->kind         != ENTITY_FUNCTION ||
3338             ref->entity->function.btk != BUILTIN_EXPECT)
3339                 return false;
3340
3341         return true;
3342 }
3343
3344 static bool produces_mode_b(const expression_t *expression)
3345 {
3346         switch (expression->kind) {
3347         case EXPR_BINARY_EQUAL:
3348         case EXPR_BINARY_NOTEQUAL:
3349         case EXPR_BINARY_LESS:
3350         case EXPR_BINARY_LESSEQUAL:
3351         case EXPR_BINARY_GREATER:
3352         case EXPR_BINARY_GREATEREQUAL:
3353         case EXPR_BINARY_ISGREATER:
3354         case EXPR_BINARY_ISGREATEREQUAL:
3355         case EXPR_BINARY_ISLESS:
3356         case EXPR_BINARY_ISLESSEQUAL:
3357         case EXPR_BINARY_ISLESSGREATER:
3358         case EXPR_BINARY_ISUNORDERED:
3359         case EXPR_UNARY_NOT:
3360                 return true;
3361
3362         case EXPR_CALL:
3363                 if (is_builtin_expect(expression)) {
3364                         expression_t *argument = expression->call.arguments->expression;
3365                         return produces_mode_b(argument);
3366                 }
3367                 return false;
3368         case EXPR_BINARY_COMMA:
3369                 return produces_mode_b(expression->binary.right);
3370
3371         default:
3372                 return false;
3373         }
3374 }
3375
3376 static ir_node *expression_to_firm(const expression_t *expression)
3377 {
3378         if (!produces_mode_b(expression)) {
3379                 ir_node *res = _expression_to_firm(expression);
3380                 assert(res == NULL || get_irn_mode(res) != mode_b);
3381                 return res;
3382         }
3383
3384         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3385                 return new_Const(fold_constant_to_tarval(expression));
3386         }
3387
3388         /* we have to produce a 0/1 from the mode_b expression */
3389         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3390         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3391         return produce_condition_result(expression, mode, dbgi);
3392 }
3393
3394 /**
3395  * create a short-circuit expression evaluation that tries to construct
3396  * efficient control flow structures for &&, || and ! expressions
3397  */
3398 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3399 {
3400         switch(expression->kind) {
3401         case EXPR_UNARY_NOT: {
3402                 const unary_expression_t *unary_expression = &expression->unary;
3403                 create_condition_evaluation(unary_expression->value, false_target, true_target);
3404                 return NULL;
3405         }
3406         case EXPR_BINARY_LOGICAL_AND: {
3407                 jump_target extra_target;
3408                 init_jump_target(&extra_target, NULL);
3409                 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3410                 if (enter_jump_target(&extra_target))
3411                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3412                 return NULL;
3413         }
3414         case EXPR_BINARY_LOGICAL_OR: {
3415                 jump_target extra_target;
3416                 init_jump_target(&extra_target, NULL);
3417                 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3418                 if (enter_jump_target(&extra_target))
3419                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3420                 return NULL;
3421         }
3422         default:
3423                 break;
3424         }
3425
3426         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3427         ir_node  *cond_expr  = _expression_to_firm(expression);
3428         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3429         ir_node  *cond       = new_d_Cond(dbgi, condition);
3430         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3431         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3432
3433         /* set branch prediction info based on __builtin_expect */
3434         if (is_builtin_expect(expression) && is_Cond(cond)) {
3435                 call_argument_t *argument = expression->call.arguments->next;
3436                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3437                         bool               const cnst = fold_constant_to_bool(argument->expression);
3438                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3439                         set_Cond_jmp_pred(cond, pred);
3440                 }
3441         }
3442
3443         add_pred_to_jump_target(true_target,  true_proj);
3444         add_pred_to_jump_target(false_target, false_proj);
3445
3446         set_unreachable_now();
3447         return cond_expr;
3448 }
3449
3450 static void create_variable_entity(entity_t *variable,
3451                                    declaration_kind_t declaration_kind,
3452                                    ir_type *parent_type)
3453 {
3454         assert(variable->kind == ENTITY_VARIABLE);
3455         type_t    *type = skip_typeref(variable->declaration.type);
3456
3457         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3458         ir_type   *const irtype    = get_ir_type(type);
3459         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3460         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3461         unsigned         alignment = variable->declaration.alignment;
3462
3463         set_entity_alignment(irentity, alignment);
3464
3465         handle_decl_modifiers(irentity, variable);
3466
3467         variable->declaration.kind  = (unsigned char) declaration_kind;
3468         variable->variable.v.entity = irentity;
3469         set_entity_ld_ident(irentity, create_ld_ident(variable));
3470
3471         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3472                 set_entity_volatility(irentity, volatility_is_volatile);
3473         }
3474 }
3475
3476
3477 typedef struct type_path_entry_t type_path_entry_t;
3478 struct type_path_entry_t {
3479         type_t           *type;
3480         ir_initializer_t *initializer;
3481         size_t            index;
3482         entity_t         *compound_entry;
3483 };
3484
3485 typedef struct type_path_t type_path_t;
3486 struct type_path_t {
3487         type_path_entry_t *path;
3488         type_t            *top_type;
3489         bool               invalid;
3490 };
3491
3492 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3493 {
3494         size_t len = ARR_LEN(path->path);
3495
3496         for (size_t i = 0; i < len; ++i) {
3497                 const type_path_entry_t *entry = & path->path[i];
3498
3499                 type_t *type = skip_typeref(entry->type);
3500                 if (is_type_compound(type)) {
3501                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3502                 } else if (is_type_array(type)) {
3503                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3504                 } else {
3505                         fprintf(stderr, "-INVALID-");
3506                 }
3507         }
3508         fprintf(stderr, "  (");
3509         print_type(path->top_type);
3510         fprintf(stderr, ")");
3511 }
3512
3513 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3514 {
3515         size_t len = ARR_LEN(path->path);
3516         assert(len > 0);
3517         return & path->path[len-1];
3518 }
3519
3520 static type_path_entry_t *append_to_type_path(type_path_t *path)
3521 {
3522         size_t len = ARR_LEN(path->path);
3523         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3524
3525         type_path_entry_t *result = & path->path[len];
3526         memset(result, 0, sizeof(result[0]));
3527         return result;
3528 }
3529
3530 static size_t get_compound_member_count(const compound_type_t *type)
3531 {
3532         compound_t *compound  = type->compound;
3533         size_t      n_members = 0;
3534         entity_t   *member    = compound->members.entities;
3535         for ( ; member != NULL; member = member->base.next) {
3536                 ++n_members;
3537         }
3538
3539         return n_members;
3540 }
3541
3542 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3543 {
3544         type_t *orig_top_type = path->top_type;
3545         type_t *top_type      = skip_typeref(orig_top_type);
3546
3547         assert(is_type_compound(top_type) || is_type_array(top_type));
3548
3549         if (ARR_LEN(path->path) == 0) {
3550                 return NULL;
3551         } else {
3552                 type_path_entry_t *top         = get_type_path_top(path);
3553                 ir_initializer_t  *initializer = top->initializer;
3554                 return get_initializer_compound_value(initializer, top->index);
3555         }
3556 }
3557
3558 static void descend_into_subtype(type_path_t *path)
3559 {
3560         type_t *orig_top_type = path->top_type;
3561         type_t *top_type      = skip_typeref(orig_top_type);
3562
3563         assert(is_type_compound(top_type) || is_type_array(top_type));
3564
3565         ir_initializer_t *initializer = get_initializer_entry(path);
3566
3567         type_path_entry_t *top = append_to_type_path(path);
3568         top->type              = top_type;
3569
3570         size_t len;
3571
3572         if (is_type_compound(top_type)) {
3573                 compound_t *const compound = top_type->compound.compound;
3574                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3575
3576                 top->compound_entry = entry;
3577                 top->index          = 0;
3578                 len                 = get_compound_member_count(&top_type->compound);
3579                 if (entry != NULL) {
3580                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3581                         path->top_type = entry->declaration.type;
3582                 }
3583         } else {
3584                 assert(is_type_array(top_type));
3585                 assert(top_type->array.size > 0);
3586
3587                 top->index     = 0;
3588                 path->top_type = top_type->array.element_type;
3589                 len            = top_type->array.size;
3590         }
3591         if (initializer == NULL
3592                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3593                 initializer = create_initializer_compound(len);
3594                 /* we have to set the entry at the 2nd latest path entry... */
3595                 size_t path_len = ARR_LEN(path->path);
3596                 assert(path_len >= 1);
3597                 if (path_len > 1) {
3598                         type_path_entry_t *entry        = & path->path[path_len-2];
3599                         ir_initializer_t  *tinitializer = entry->initializer;
3600                         set_initializer_compound_value(tinitializer, entry->index,
3601                                                        initializer);
3602                 }
3603         }
3604         top->initializer = initializer;
3605 }
3606
3607 static void ascend_from_subtype(type_path_t *path)
3608 {
3609         type_path_entry_t *top = get_type_path_top(path);
3610
3611         path->top_type = top->type;
3612
3613         size_t len = ARR_LEN(path->path);
3614         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3615 }
3616
3617 static void walk_designator(type_path_t *path, const designator_t *designator)
3618 {
3619         /* designators start at current object type */
3620         ARR_RESIZE(type_path_entry_t, path->path, 1);
3621
3622         for ( ; designator != NULL; designator = designator->next) {
3623                 type_path_entry_t *top         = get_type_path_top(path);
3624                 type_t            *orig_type   = top->type;
3625                 type_t            *type        = skip_typeref(orig_type);
3626
3627                 if (designator->symbol != NULL) {
3628                         assert(is_type_compound(type));
3629                         size_t    index  = 0;
3630                         symbol_t *symbol = designator->symbol;
3631
3632                         compound_t *compound = type->compound.compound;
3633                         entity_t   *iter     = compound->members.entities;
3634                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3635                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3636
3637                         /* revert previous initialisations of other union elements */
3638                         if (type->kind == TYPE_COMPOUND_UNION) {
3639                                 ir_initializer_t *initializer = top->initializer;
3640                                 if (initializer != NULL
3641                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3642                                         /* are we writing to a new element? */
3643                                         ir_initializer_t *oldi
3644                                                 = get_initializer_compound_value(initializer, index);
3645                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3646                                                 /* clear initializer */
3647                                                 size_t len
3648                                                         = get_initializer_compound_n_entries(initializer);
3649                                                 ir_initializer_t *nulli = get_initializer_null();
3650                                                 for (size_t i = 0; i < len; ++i) {
3651                                                         set_initializer_compound_value(initializer, i,
3652                                                                                        nulli);
3653                                                 }
3654                                         }
3655                                 }
3656                         }
3657
3658                         top->type           = orig_type;
3659                         top->compound_entry = iter;
3660                         top->index          = index;
3661                         orig_type           = iter->declaration.type;
3662                 } else {
3663                         expression_t *array_index = designator->array_index;
3664                         assert(is_type_array(type));
3665
3666                         long index = fold_constant_to_int(array_index);
3667                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3668
3669                         top->type  = orig_type;
3670                         top->index = (size_t) index;
3671                         orig_type  = type->array.element_type;
3672                 }
3673                 path->top_type = orig_type;
3674
3675                 if (designator->next != NULL) {
3676                         descend_into_subtype(path);
3677                 }
3678         }
3679
3680         path->invalid  = false;
3681 }
3682
3683 static void advance_current_object(type_path_t *path)
3684 {
3685         if (path->invalid) {
3686                 /* TODO: handle this... */
3687                 panic("invalid initializer (excessive elements)");
3688         }
3689
3690         type_path_entry_t *top = get_type_path_top(path);
3691
3692         type_t *type = skip_typeref(top->type);
3693         if (is_type_union(type)) {
3694                 /* only the first element is initialized in unions */
3695                 top->compound_entry = NULL;
3696         } else if (is_type_struct(type)) {
3697                 entity_t *entry = top->compound_entry;
3698
3699                 top->index++;
3700                 entry               = skip_unnamed_bitfields(entry->base.next);
3701                 top->compound_entry = entry;
3702                 if (entry != NULL) {
3703                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3704                         path->top_type = entry->declaration.type;
3705                         return;
3706                 }
3707         } else {
3708                 assert(is_type_array(type));
3709
3710                 top->index++;
3711                 if (!type->array.size_constant || top->index < type->array.size) {
3712                         return;
3713                 }
3714         }
3715
3716         /* we're past the last member of the current sub-aggregate, try if we
3717          * can ascend in the type hierarchy and continue with another subobject */
3718         size_t len = ARR_LEN(path->path);
3719
3720         if (len > 1) {
3721                 ascend_from_subtype(path);
3722                 advance_current_object(path);
3723         } else {
3724                 path->invalid = true;
3725         }
3726 }
3727
3728
3729 static ir_initializer_t *create_ir_initializer_value(
3730                 const initializer_value_t *initializer)
3731 {
3732         if (is_type_compound(initializer->value->base.type)) {
3733                 panic("initializer creation for compounds not implemented yet");
3734         }
3735         type_t       *type = initializer->value->base.type;
3736         expression_t *expr = initializer->value;
3737         ir_node *value = expression_to_firm(expr);
3738         ir_mode *mode  = get_ir_mode_storage(type);
3739         value          = create_conv(NULL, value, mode);
3740         return create_initializer_const(value);
3741 }
3742
3743 /** test wether type can be initialized by a string constant */
3744 static bool is_string_type(type_t *type)
3745 {
3746         if (!is_type_array(type))
3747                 return false;
3748
3749         type_t *const inner = skip_typeref(type->array.element_type);
3750         return is_type_integer(inner);
3751 }
3752
3753 static ir_initializer_t *create_ir_initializer_list(
3754                 const initializer_list_t *initializer, type_t *type)
3755 {
3756         type_path_t path;
3757         memset(&path, 0, sizeof(path));
3758         path.top_type = type;
3759         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3760
3761         descend_into_subtype(&path);
3762
3763         for (size_t i = 0; i < initializer->len; ++i) {
3764                 const initializer_t *sub_initializer = initializer->initializers[i];
3765
3766                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3767                         walk_designator(&path, sub_initializer->designator.designator);
3768                         continue;
3769                 }
3770
3771                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3772                         /* we might have to descend into types until we're at a scalar
3773                          * type */
3774                         while(true) {
3775                                 type_t *orig_top_type = path.top_type;
3776                                 type_t *top_type      = skip_typeref(orig_top_type);
3777
3778                                 if (is_type_scalar(top_type))
3779                                         break;
3780                                 descend_into_subtype(&path);
3781                         }
3782                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3783                         /* we might have to descend into types until we're at a scalar
3784                          * type */
3785                         while (true) {
3786                                 type_t *orig_top_type = path.top_type;
3787                                 type_t *top_type      = skip_typeref(orig_top_type);
3788
3789                                 if (is_string_type(top_type))
3790                                         break;
3791                                 descend_into_subtype(&path);
3792                         }
3793                 }
3794
3795                 ir_initializer_t *sub_irinitializer
3796                         = create_ir_initializer(sub_initializer, path.top_type);
3797
3798                 size_t path_len = ARR_LEN(path.path);
3799                 assert(path_len >= 1);
3800                 type_path_entry_t *entry        = & path.path[path_len-1];
3801                 ir_initializer_t  *tinitializer = entry->initializer;
3802                 set_initializer_compound_value(tinitializer, entry->index,
3803                                                sub_irinitializer);
3804
3805                 advance_current_object(&path);
3806         }
3807
3808         assert(ARR_LEN(path.path) >= 1);
3809         ir_initializer_t *result = path.path[0].initializer;
3810         DEL_ARR_F(path.path);
3811
3812         return result;
3813 }
3814
3815 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3816 {
3817         type = skip_typeref(type);
3818
3819         assert(type->kind == TYPE_ARRAY);
3820         assert(type->array.size_constant);
3821         string_literal_expression_t const *const str = get_init_string(init);
3822         size_t            const str_len = str->value.size;
3823         size_t            const arr_len = type->array.size;
3824         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
3825         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
3826         char const       *      p       = str->value.begin;
3827         switch (str->value.encoding) {
3828         case STRING_ENCODING_CHAR:
3829                 for (size_t i = 0; i != arr_len; ++i) {
3830                         char              const c      = i < str_len ? *p++ : 0;
3831                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3832                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3833                         set_initializer_compound_value(irinit, i, tvinit);
3834                 }
3835                 break;
3836
3837         case STRING_ENCODING_WIDE:
3838                 for (size_t i = 0; i != arr_len; ++i) {
3839                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
3840                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3841                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3842                         set_initializer_compound_value(irinit, i, tvinit);
3843                 }
3844                 break;
3845         }
3846
3847         return irinit;
3848 }
3849
3850 static ir_initializer_t *create_ir_initializer(
3851                 const initializer_t *initializer, type_t *type)
3852 {
3853         switch(initializer->kind) {
3854                 case INITIALIZER_STRING:
3855                         return create_ir_initializer_string(initializer, type);
3856
3857                 case INITIALIZER_LIST:
3858                         return create_ir_initializer_list(&initializer->list, type);
3859
3860                 case INITIALIZER_VALUE:
3861                         return create_ir_initializer_value(&initializer->value);
3862
3863                 case INITIALIZER_DESIGNATOR:
3864                         panic("unexpected designator initializer");
3865         }
3866         panic("unknown initializer");
3867 }
3868
3869 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
3870  *  are elements [...] the remainder of the aggregate shall be initialized
3871  *  implicitly the same as objects that have static storage duration. */
3872 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3873                 ir_node *base_addr)
3874 {
3875         /* for unions we must NOT do anything for null initializers */
3876         ir_type *owner = get_entity_owner(entity);
3877         if (is_Union_type(owner)) {
3878                 return;
3879         }
3880
3881         ir_type *ent_type = get_entity_type(entity);
3882         /* create sub-initializers for a compound type */
3883         if (is_compound_type(ent_type)) {
3884                 unsigned n_members = get_compound_n_members(ent_type);
3885                 for (unsigned n = 0; n < n_members; ++n) {
3886                         ir_entity *member = get_compound_member(ent_type, n);
3887                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3888                                                                 member);
3889                         create_dynamic_null_initializer(member, dbgi, addr);
3890                 }
3891                 return;
3892         }
3893         if (is_Array_type(ent_type)) {
3894                 assert(has_array_upper_bound(ent_type, 0));
3895                 long n = get_array_upper_bound_int(ent_type, 0);
3896                 for (long i = 0; i < n; ++i) {
3897                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3898                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3899                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3900                         ir_node   *in[1]    = { cnst };
3901                         ir_entity *arrent   = get_array_element_entity(ent_type);
3902                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3903                                                         arrent);
3904                         create_dynamic_null_initializer(arrent, dbgi, addr);
3905                 }
3906                 return;
3907         }
3908
3909         ir_mode *value_mode = get_type_mode(ent_type);
3910         ir_node *node       = new_Const(get_mode_null(value_mode));
3911
3912         /* is it a bitfield type? */
3913         if (is_Primitive_type(ent_type) &&
3914                         get_primitive_base_type(ent_type) != NULL) {
3915                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3916                 return;
3917         }
3918
3919         ir_node *mem    = get_store();
3920         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3921         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3922         set_store(proj_m);
3923 }
3924
3925 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3926                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3927 {
3928         switch(get_initializer_kind(initializer)) {
3929         case IR_INITIALIZER_NULL:
3930                 create_dynamic_null_initializer(entity, dbgi, base_addr);
3931                 return;
3932         case IR_INITIALIZER_CONST: {
3933                 ir_node *node     = get_initializer_const_value(initializer);
3934                 ir_type *ent_type = get_entity_type(entity);
3935
3936                 /* is it a bitfield type? */
3937                 if (is_Primitive_type(ent_type) &&
3938                                 get_primitive_base_type(ent_type) != NULL) {
3939                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3940                         return;
3941                 }
3942
3943                 assert(get_type_mode(type) == get_irn_mode(node));
3944                 ir_node *mem    = get_store();
3945                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3946                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3947                 set_store(proj_m);
3948                 return;
3949         }
3950         case IR_INITIALIZER_TARVAL: {
3951                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
3952                 ir_node   *cnst     = new_d_Const(dbgi, tv);
3953                 ir_type   *ent_type = get_entity_type(entity);
3954
3955                 /* is it a bitfield type? */
3956                 if (is_Primitive_type(ent_type) &&
3957                                 get_primitive_base_type(ent_type) != NULL) {
3958                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3959                         return;
3960                 }
3961
3962                 assert(get_type_mode(type) == get_tarval_mode(tv));
3963                 ir_node *mem    = get_store();
3964                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3965                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3966                 set_store(proj_m);
3967                 return;
3968         }
3969         case IR_INITIALIZER_COMPOUND: {
3970                 assert(is_compound_type(type) || is_Array_type(type));
3971                 int n_members;
3972                 if (is_Array_type(type)) {
3973                         assert(has_array_upper_bound(type, 0));
3974                         n_members = get_array_upper_bound_int(type, 0);
3975                 } else {
3976                         n_members = get_compound_n_members(type);
3977                 }
3978
3979                 if (get_initializer_compound_n_entries(initializer)
3980                                 != (unsigned) n_members)
3981                         panic("initializer doesn't match compound type");
3982
3983                 for (int i = 0; i < n_members; ++i) {
3984                         ir_node   *addr;
3985                         ir_type   *irtype;
3986                         ir_entity *sub_entity;
3987                         if (is_Array_type(type)) {
3988                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3989                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3990                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3991                                 ir_node   *in[1]    = { cnst };
3992                                 irtype     = get_array_element_type(type);
3993                                 sub_entity = get_array_element_entity(type);
3994                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3995                                                        sub_entity);
3996                         } else {
3997                                 sub_entity = get_compound_member(type, i);
3998                                 irtype     = get_entity_type(sub_entity);
3999                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4000                                                              sub_entity);
4001                         }
4002
4003                         ir_initializer_t *sub_init
4004                                 = get_initializer_compound_value(initializer, i);
4005
4006                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4007                                                        addr);
4008                 }
4009                 return;
4010         }
4011         }
4012
4013         panic("invalid ir_initializer");
4014 }
4015
4016 static void create_dynamic_initializer(ir_initializer_t *initializer,
4017                 dbg_info *dbgi, ir_entity *entity)
4018 {
4019         ir_node *frame     = get_irg_frame(current_ir_graph);
4020         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4021         ir_type *type      = get_entity_type(entity);
4022
4023         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4024 }
4025
4026 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4027                                      ir_entity *entity, type_t *type)
4028 {
4029         ir_node *memory = get_store();
4030         ir_node *nomem  = new_NoMem();
4031         ir_node *frame  = get_irg_frame(current_ir_graph);
4032         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4033
4034         if (initializer->kind == INITIALIZER_VALUE) {
4035                 initializer_value_t *initializer_value = &initializer->value;
4036
4037                 ir_node *value = expression_to_firm(initializer_value->value);
4038                 type = skip_typeref(type);
4039                 assign_value(dbgi, addr, type, value);
4040                 return;
4041         }
4042
4043         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4044                 ir_initializer_t *irinitializer
4045                         = create_ir_initializer(initializer, type);
4046
4047                 create_dynamic_initializer(irinitializer, dbgi, entity);
4048                 return;
4049         }
4050
4051         /* create a "template" entity which is copied to the entity on the stack */
4052         ir_entity *const init_entity
4053                 = create_initializer_entity(dbgi, initializer, type);
4054         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4055         ir_type *const irtype   = get_ir_type(type);
4056         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4057
4058         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4059         set_store(copyb_mem);
4060 }
4061
4062 static void create_initializer_local_variable_entity(entity_t *entity)
4063 {
4064         assert(entity->kind == ENTITY_VARIABLE);
4065         initializer_t *initializer = entity->variable.initializer;
4066         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4067         ir_entity     *irentity    = entity->variable.v.entity;
4068         type_t        *type        = entity->declaration.type;
4069
4070         create_local_initializer(initializer, dbgi, irentity, type);
4071 }
4072
4073 static void create_variable_initializer(entity_t *entity)
4074 {
4075         assert(entity->kind == ENTITY_VARIABLE);
4076         initializer_t *initializer = entity->variable.initializer;
4077         if (initializer == NULL)
4078                 return;
4079
4080         declaration_kind_t declaration_kind
4081                 = (declaration_kind_t) entity->declaration.kind;
4082         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4083                 create_initializer_local_variable_entity(entity);
4084                 return;
4085         }
4086
4087         type_t            *type = entity->declaration.type;
4088         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4089
4090         if (initializer->kind == INITIALIZER_VALUE) {
4091                 expression_t *      value     = initializer->value.value;
4092                 type_t       *const init_type = skip_typeref(value->base.type);
4093
4094                 if (!is_type_scalar(init_type)) {
4095                         /* skip convs */
4096                         while (value->kind == EXPR_UNARY_CAST)
4097                                 value = value->unary.value;
4098
4099                         if (value->kind != EXPR_COMPOUND_LITERAL)
4100                                 panic("expected non-scalar initializer to be a compound literal");
4101                         initializer = value->compound_literal.initializer;
4102                         goto have_initializer;
4103                 }
4104
4105                 ir_node  *      node = expression_to_firm(value);
4106                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4107                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4108                 node = create_conv(dbgi, node, mode);
4109
4110                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4111                         set_value(entity->variable.v.value_number, node);
4112                 } else {
4113                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4114
4115                         ir_entity *irentity = entity->variable.v.entity;
4116
4117                         if (tq & TYPE_QUALIFIER_CONST
4118                                         && get_entity_owner(irentity) != get_tls_type()) {
4119                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4120                         }
4121                         set_atomic_ent_value(irentity, node);
4122                 }
4123         } else {
4124 have_initializer:
4125                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4126                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4127
4128                 ir_entity        *irentity        = entity->variable.v.entity;
4129                 ir_initializer_t *irinitializer
4130                         = create_ir_initializer(initializer, type);
4131
4132                 if (tq & TYPE_QUALIFIER_CONST) {
4133                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4134                 }
4135                 set_entity_initializer(irentity, irinitializer);
4136         }
4137 }
4138
4139 static void create_variable_length_array(entity_t *entity)
4140 {
4141         assert(entity->kind == ENTITY_VARIABLE);
4142         assert(entity->variable.initializer == NULL);
4143
4144         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4145         entity->variable.v.vla_base = NULL;
4146
4147         /* TODO: record VLA somewhere so we create the free node when we leave
4148          * it's scope */
4149 }
4150
4151 static void allocate_variable_length_array(entity_t *entity)
4152 {
4153         assert(entity->kind == ENTITY_VARIABLE);
4154         assert(entity->variable.initializer == NULL);
4155         assert(currently_reachable());
4156
4157         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4158         type_t   *type      = entity->declaration.type;
4159         ir_type  *el_type   = get_ir_type(type->array.element_type);
4160
4161         /* make sure size_node is calculated */
4162         get_type_size_node(type);
4163         ir_node  *elems = type->array.size_node;
4164         ir_node  *mem   = get_store();
4165         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4166
4167         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4168         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4169         set_store(proj_m);
4170
4171         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4172         entity->variable.v.vla_base = addr;
4173 }
4174
4175 static bool var_needs_entity(variable_t const *const var)
4176 {
4177         if (var->address_taken)
4178                 return true;
4179         type_t *const type = skip_typeref(var->base.type);
4180         return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4181 }
4182
4183 /**
4184  * Creates a Firm local variable from a declaration.
4185  */
4186 static void create_local_variable(entity_t *entity)
4187 {
4188         assert(entity->kind == ENTITY_VARIABLE);
4189         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4190
4191         if (!var_needs_entity(&entity->variable)) {
4192                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4193                 entity->variable.v.value_number = next_value_number_function;
4194                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4195                 ++next_value_number_function;
4196                 return;
4197         }
4198
4199         /* is it a variable length array? */
4200         type_t *const type = skip_typeref(entity->declaration.type);
4201         if (is_type_array(type) && !type->array.size_constant) {
4202                 create_variable_length_array(entity);
4203                 return;
4204         }
4205
4206         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4207         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4208 }
4209
4210 static void create_local_static_variable(entity_t *entity)
4211 {
4212         assert(entity->kind == ENTITY_VARIABLE);
4213         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4214
4215         type_t   *type           = skip_typeref(entity->declaration.type);
4216         ir_type  *const var_type = entity->variable.thread_local ?
4217                 get_tls_type() : get_glob_type();
4218         ir_type  *const irtype   = get_ir_type(type);
4219         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4220
4221         size_t l = strlen(entity->base.symbol->string);
4222         char   buf[l + sizeof(".%u")];
4223         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4224         ident     *const id       = id_unique(buf);
4225         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4226
4227         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4228                 set_entity_volatility(irentity, volatility_is_volatile);
4229         }
4230
4231         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4232         entity->variable.v.entity = irentity;
4233
4234         set_entity_ld_ident(irentity, id);
4235         set_entity_visibility(irentity, ir_visibility_local);
4236
4237         if (entity->variable.initializer == NULL) {
4238                 ir_initializer_t *null_init = get_initializer_null();
4239                 set_entity_initializer(irentity, null_init);
4240         }
4241
4242         PUSH_IRG(get_const_code_irg());
4243         create_variable_initializer(entity);
4244         POP_IRG();
4245 }
4246
4247
4248
4249 static ir_node *return_statement_to_firm(return_statement_t *statement)
4250 {
4251         if (!currently_reachable())
4252                 return NULL;
4253
4254         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4255         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4256         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4257
4258         int in_len;
4259         if (!is_type_void(type)) {
4260                 ir_mode *const mode = get_ir_mode_storage(type);
4261                 if (res) {
4262                         res = create_conv(dbgi, res, mode);
4263                 } else {
4264                         res = new_Unknown(mode);
4265                 }
4266                 in_len = 1;
4267         } else {
4268                 in_len = 0;
4269         }
4270
4271         ir_node *const in[1] = { res };
4272         ir_node *const store = get_store();
4273         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4274
4275         ir_node *end_block = get_irg_end_block(current_ir_graph);
4276         add_immBlock_pred(end_block, ret);
4277
4278         set_unreachable_now();
4279         return NULL;
4280 }
4281
4282 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4283 {
4284         if (!currently_reachable())
4285                 return NULL;
4286
4287         return expression_to_firm(statement->expression);
4288 }
4289
4290 static void create_local_declarations(entity_t*);
4291
4292 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4293 {
4294         create_local_declarations(compound->scope.entities);
4295
4296         ir_node     *result    = NULL;
4297         statement_t *statement = compound->statements;
4298         for ( ; statement != NULL; statement = statement->base.next) {
4299                 result = statement_to_firm(statement);
4300         }
4301
4302         return result;
4303 }
4304
4305 static void create_global_variable(entity_t *entity)
4306 {
4307         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4308         ir_visibility       visibility = ir_visibility_external;
4309         storage_class_tag_t storage
4310                 = (storage_class_tag_t)entity->declaration.storage_class;
4311         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4312         assert(entity->kind == ENTITY_VARIABLE);
4313
4314         switch (storage) {
4315         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4316         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4317         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4318         case STORAGE_CLASS_TYPEDEF:
4319         case STORAGE_CLASS_AUTO:
4320         case STORAGE_CLASS_REGISTER:
4321                 panic("invalid storage class for global var");
4322         }
4323
4324         /* "common" symbols */
4325         if (storage == STORAGE_CLASS_NONE
4326             && entity->variable.initializer == NULL
4327             && !entity->variable.thread_local
4328             && (modifiers & DM_WEAK) == 0) {
4329                 linkage |= IR_LINKAGE_MERGE;
4330         }
4331
4332         ir_type *var_type = get_glob_type();
4333         if (entity->variable.thread_local) {
4334                 var_type = get_tls_type();
4335         }
4336         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4337         ir_entity *irentity = entity->variable.v.entity;
4338         add_entity_linkage(irentity, linkage);
4339         set_entity_visibility(irentity, visibility);
4340         if (entity->variable.initializer == NULL
4341             && storage != STORAGE_CLASS_EXTERN) {
4342                 ir_initializer_t *null_init = get_initializer_null();
4343                 set_entity_initializer(irentity, null_init);
4344         }
4345 }
4346
4347 static void create_local_declaration(entity_t *entity)
4348 {
4349         assert(is_declaration(entity));
4350
4351         /* construct type */
4352         (void) get_ir_type(entity->declaration.type);
4353         if (entity->base.symbol == NULL) {
4354                 return;
4355         }
4356
4357         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4358         case STORAGE_CLASS_STATIC:
4359                 if (entity->kind == ENTITY_FUNCTION) {
4360                         (void)get_function_entity(entity, NULL);
4361                 } else {
4362                         create_local_static_variable(entity);
4363                 }
4364                 return;
4365         case STORAGE_CLASS_EXTERN:
4366                 if (entity->kind == ENTITY_FUNCTION) {
4367                         assert(entity->function.body == NULL);
4368                         (void)get_function_entity(entity, NULL);
4369                 } else {
4370                         create_global_variable(entity);
4371                         create_variable_initializer(entity);
4372                 }
4373                 return;
4374         case STORAGE_CLASS_NONE:
4375         case STORAGE_CLASS_AUTO:
4376         case STORAGE_CLASS_REGISTER:
4377                 if (entity->kind == ENTITY_FUNCTION) {
4378                         if (entity->function.body != NULL) {
4379                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4380                                 (void)get_function_entity(entity, owner);
4381                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4382                                 enqueue_inner_function(entity);
4383                         } else {
4384                                 (void)get_function_entity(entity, NULL);
4385                         }
4386                 } else {
4387                         create_local_variable(entity);
4388                 }
4389                 return;
4390         case STORAGE_CLASS_TYPEDEF:
4391                 break;
4392         }
4393         panic("invalid storage class");
4394 }
4395
4396 static void create_local_declarations(entity_t *e)
4397 {
4398         for (; e; e = e->base.next) {
4399                 if (is_declaration(e))
4400                         create_local_declaration(e);
4401         }
4402 }
4403
4404 static void initialize_local_declaration(entity_t *entity)
4405 {
4406         if (entity->base.symbol == NULL)
4407                 return;
4408
4409         // no need to emit code in dead blocks
4410         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4411                         && !currently_reachable())
4412                 return;
4413
4414         switch ((declaration_kind_t) entity->declaration.kind) {
4415         case DECLARATION_KIND_LOCAL_VARIABLE:
4416         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4417                 create_variable_initializer(entity);
4418                 return;
4419
4420         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4421                 allocate_variable_length_array(entity);
4422                 return;
4423
4424         case DECLARATION_KIND_COMPOUND_MEMBER:
4425         case DECLARATION_KIND_GLOBAL_VARIABLE:
4426         case DECLARATION_KIND_FUNCTION:
4427         case DECLARATION_KIND_INNER_FUNCTION:
4428                 return;
4429
4430         case DECLARATION_KIND_PARAMETER:
4431         case DECLARATION_KIND_PARAMETER_ENTITY:
4432                 panic("can't initialize parameters");
4433
4434         case DECLARATION_KIND_UNKNOWN:
4435                 panic("can't initialize unknown declaration");
4436         }
4437         panic("invalid declaration kind");
4438 }
4439
4440 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4441 {
4442         entity_t *entity = statement->declarations_begin;
4443         if (entity == NULL)
4444                 return NULL;
4445
4446         entity_t *const last = statement->declarations_end;
4447         for ( ;; entity = entity->base.next) {
4448                 if (is_declaration(entity)) {
4449                         initialize_local_declaration(entity);
4450                 } else if (entity->kind == ENTITY_TYPEDEF) {
4451                         /* §6.7.7:3  Any array size expressions associated with variable length
4452                          * array declarators are evaluated each time the declaration of the
4453                          * typedef name is reached in the order of execution. */
4454                         type_t *const type = skip_typeref(entity->typedefe.type);
4455                         if (is_type_array(type) && type->array.is_vla)
4456                                 get_vla_size(&type->array);
4457                 }
4458                 if (entity == last)
4459                         break;
4460         }
4461
4462         return NULL;
4463 }
4464
4465 static ir_node *if_statement_to_firm(if_statement_t *statement)
4466 {
4467         create_local_declarations(statement->scope.entities);
4468
4469         /* Create the condition. */
4470         jump_target true_target;
4471         jump_target false_target;
4472         init_jump_target(&true_target,  NULL);
4473         init_jump_target(&false_target, NULL);
4474         if (currently_reachable())
4475                 create_condition_evaluation(statement->condition, &true_target, &false_target);
4476
4477         jump_target exit_target;
4478         init_jump_target(&exit_target, NULL);
4479
4480         /* Create the true statement. */
4481         enter_jump_target(&true_target);
4482         statement_to_firm(statement->true_statement);
4483         jump_to_target(&exit_target);
4484
4485         /* Create the false statement. */
4486         enter_jump_target(&false_target);
4487         if (statement->false_statement)
4488                 statement_to_firm(statement->false_statement);
4489         jump_to_target(&exit_target);
4490
4491         enter_jump_target(&exit_target);
4492         return NULL;
4493 }
4494
4495 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4496 {
4497         create_local_declarations(statement->scope.entities);
4498
4499         PUSH_BREAK(NULL);
4500         PUSH_CONTINUE(NULL);
4501
4502         expression_t *const cond = statement->condition;
4503         /* Avoid an explicit body block in case of do ... while (0);. */
4504         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4505                 /* do ... while (0);. */
4506                 statement_to_firm(statement->body);
4507                 jump_to_target(&continue_target);
4508                 enter_jump_target(&continue_target);
4509                 jump_to_target(&break_target);
4510         } else {
4511                 jump_target body_target;
4512                 init_jump_target(&body_target, NULL);
4513                 jump_to_target(&body_target);
4514                 enter_immature_jump_target(&body_target);
4515                 statement_to_firm(statement->body);
4516                 jump_to_target(&continue_target);
4517                 if (enter_jump_target(&continue_target))
4518                         create_condition_evaluation(statement->condition, &body_target, &break_target);
4519                 enter_jump_target(&body_target);
4520         }
4521         enter_jump_target(&break_target);
4522
4523         POP_CONTINUE();
4524         POP_BREAK();
4525         return NULL;
4526 }
4527
4528 static ir_node *for_statement_to_firm(for_statement_t *statement)
4529 {
4530         create_local_declarations(statement->scope.entities);
4531
4532         if (currently_reachable()) {
4533                 entity_t *entity = statement->scope.entities;
4534                 for ( ; entity != NULL; entity = entity->base.next) {
4535                         if (!is_declaration(entity))
4536                                 continue;
4537
4538                         initialize_local_declaration(entity);
4539                 }
4540
4541                 if (statement->initialisation != NULL) {
4542                         expression_to_firm(statement->initialisation);
4543                 }
4544         }
4545
4546         /* Create the header block */
4547         jump_target header_target;
4548         init_jump_target(&header_target, NULL);
4549         jump_to_target(&header_target);
4550         enter_immature_jump_target(&header_target);
4551
4552         expression_t *const step = statement->step;
4553         PUSH_BREAK(NULL);
4554         PUSH_CONTINUE(step ? NULL : header_target.block);
4555
4556         /* Create the condition. */
4557         expression_t *const cond = statement->condition;
4558         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4559                 jump_target body_target;
4560                 init_jump_target(&body_target, NULL);
4561                 create_condition_evaluation(cond, &body_target, &break_target);
4562                 enter_jump_target(&body_target);
4563         } else {
4564                 /* for-ever. */
4565                 keep_alive(header_target.block);
4566                 keep_all_memory(header_target.block);
4567         }
4568
4569         /* Create the loop body. */
4570         statement_to_firm(statement->body);
4571         jump_to_target(&continue_target);
4572
4573         /* Create the step code. */
4574         if (step && enter_jump_target(&continue_target)) {
4575                 expression_to_firm(step);
4576                 jump_to_target(&header_target);
4577         }
4578
4579         enter_jump_target(&header_target);
4580         enter_jump_target(&break_target);
4581
4582         POP_CONTINUE();
4583         POP_BREAK();
4584         return NULL;
4585 }
4586
4587 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4588 {
4589         /* determine number of cases */
4590         size_t n_cases = 0;
4591         for (case_label_statement_t *l = statement->first_case; l != NULL;
4592              l = l->next) {
4593                 /* default case */
4594                 if (l->expression == NULL)
4595                         continue;
4596                 if (l->is_empty_range)
4597                         continue;
4598                 ++n_cases;
4599         }
4600
4601         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4602         size_t           i   = 0;
4603         for (case_label_statement_t *l = statement->first_case; l != NULL;
4604              l = l->next) {
4605             if (l->expression == NULL) {
4606                         l->pn = pn_Switch_default;
4607                         continue;
4608                 }
4609                 if (l->is_empty_range)
4610                         continue;
4611                 ir_tarval *min = l->first_case;
4612                 ir_tarval *max = l->last_case;
4613                 long       pn  = (long) i+1;
4614                 ir_switch_table_set(res, i++, min, max, pn);
4615                 l->pn = pn;
4616         }
4617         return res;
4618 }
4619
4620 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4621 {
4622         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4623         ir_node  *switch_node = NULL;
4624
4625         if (currently_reachable()) {
4626                 ir_node *expression = expression_to_firm(statement->expression);
4627                 ir_switch_table *table = create_switch_table(statement);
4628                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4629
4630                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4631         }
4632
4633         set_unreachable_now();
4634
4635         PUSH_BREAK(NULL);
4636         ir_node *const old_switch            = current_switch;
4637         const bool     old_saw_default_label = saw_default_label;
4638         saw_default_label                    = false;
4639         current_switch                       = switch_node;
4640
4641         statement_to_firm(statement->body);
4642         jump_to_target(&break_target);
4643
4644         if (!saw_default_label && switch_node) {
4645                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4646                 add_pred_to_jump_target(&break_target, proj);
4647         }
4648
4649         enter_jump_target(&break_target);
4650
4651         assert(current_switch == switch_node);
4652         current_switch    = old_switch;
4653         saw_default_label = old_saw_default_label;
4654         POP_BREAK();
4655         return NULL;
4656 }
4657
4658 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4659 {
4660         if (current_switch != NULL && !statement->is_empty_range) {
4661                 jump_target case_target;
4662                 init_jump_target(&case_target, NULL);
4663
4664                 /* Fallthrough from previous case */
4665                 jump_to_target(&case_target);
4666
4667                 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4668                 add_pred_to_jump_target(&case_target, proj);
4669                 if (statement->expression == NULL)
4670                         saw_default_label = true;
4671
4672                 enter_jump_target(&case_target);
4673         }
4674
4675         return statement_to_firm(statement->statement);
4676 }
4677
4678 static ir_node *label_to_firm(const label_statement_t *statement)
4679 {
4680         label_t *const label = statement->label;
4681         prepare_label_target(label);
4682         jump_to_target(&label->target);
4683         if (--label->n_users == 0) {
4684                 enter_jump_target(&label->target);
4685         } else {
4686                 enter_immature_jump_target(&label->target);
4687                 keep_alive(label->target.block);
4688                 keep_all_memory(label->target.block);
4689         }
4690
4691         return statement_to_firm(statement->statement);
4692 }
4693
4694 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4695 {
4696         label_t *const label = stmt->label;
4697         prepare_label_target(label);
4698         jump_to_target(&label->target);
4699         if (--label->n_users == 0)
4700                 enter_jump_target(&label->target);
4701         set_unreachable_now();
4702         return NULL;
4703 }
4704
4705 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4706 {
4707         if (currently_reachable()) {
4708                 ir_node *const op = expression_to_firm(statement->expression);
4709                 ARR_APP1(ir_node*, ijmp_ops, op);
4710                 jump_to_target(&ijmp_target);
4711                 set_unreachable_now();
4712         }
4713         return NULL;
4714 }
4715
4716 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4717 {
4718         bool           needs_memory = statement->is_volatile;
4719         size_t         n_clobbers   = 0;
4720         asm_clobber_t *clobber      = statement->clobbers;
4721         for ( ; clobber != NULL; clobber = clobber->next) {
4722                 const char *clobber_str = clobber->clobber.begin;
4723
4724                 if (!be_is_valid_clobber(clobber_str)) {
4725                         errorf(&statement->base.source_position,
4726                                    "invalid clobber '%s' specified", clobber->clobber);
4727                         continue;
4728                 }
4729
4730                 if (streq(clobber_str, "memory")) {
4731                         needs_memory = true;
4732                         continue;
4733                 }
4734
4735                 ident *id = new_id_from_str(clobber_str);
4736                 obstack_ptr_grow(&asm_obst, id);
4737                 ++n_clobbers;
4738         }
4739         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4740         ident **clobbers = NULL;
4741         if (n_clobbers > 0) {
4742                 clobbers = obstack_finish(&asm_obst);
4743         }
4744
4745         size_t n_inputs  = 0;
4746         asm_argument_t *argument = statement->inputs;
4747         for ( ; argument != NULL; argument = argument->next)
4748                 n_inputs++;
4749         size_t n_outputs = 0;
4750         argument = statement->outputs;
4751         for ( ; argument != NULL; argument = argument->next)
4752                 n_outputs++;
4753
4754         unsigned next_pos = 0;
4755
4756         ir_node *ins[n_inputs + n_outputs + 1];
4757         size_t   in_size = 0;
4758
4759         ir_asm_constraint tmp_in_constraints[n_outputs];
4760
4761         const expression_t *out_exprs[n_outputs];
4762         ir_node            *out_addrs[n_outputs];
4763         size_t              out_size = 0;
4764
4765         argument = statement->outputs;
4766         for ( ; argument != NULL; argument = argument->next) {
4767                 const char *constraints = argument->constraints.begin;
4768                 asm_constraint_flags_t asm_flags
4769                         = be_parse_asm_constraints(constraints);
4770
4771                 {
4772                         source_position_t const *const pos = &statement->base.source_position;
4773                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4774                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4775                         }
4776                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4777                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
4778                                 continue;
4779                         }
4780                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4781                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4782                                 continue;
4783                         }
4784                 }
4785
4786                 unsigned pos = next_pos++;
4787                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4788                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4789                         expression_t *expr = argument->expression;
4790                         ir_node      *addr = expression_to_addr(expr);
4791                         /* in+output, construct an artifical same_as constraint on the
4792                          * input */
4793                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4794                                 char     buf[64];
4795                                 ir_node *value = get_value_from_lvalue(expr, addr);
4796
4797                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4798
4799                                 ir_asm_constraint constraint;
4800                                 constraint.pos              = pos;
4801                                 constraint.constraint       = new_id_from_str(buf);
4802                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4803                                 tmp_in_constraints[in_size] = constraint;
4804                                 ins[in_size] = value;
4805
4806                                 ++in_size;
4807                         }
4808
4809                         out_exprs[out_size] = expr;
4810                         out_addrs[out_size] = addr;
4811                         ++out_size;
4812                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4813                         /* pure memory ops need no input (but we have to make sure we
4814                          * attach to the memory) */
4815                         assert(! (asm_flags &
4816                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4817                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4818                         needs_memory = true;
4819
4820                         /* we need to attach the address to the inputs */
4821                         expression_t *expr = argument->expression;
4822
4823                         ir_asm_constraint constraint;
4824                         constraint.pos              = pos;
4825                         constraint.constraint       = new_id_from_str(constraints);
4826                         constraint.mode             = mode_M;
4827                         tmp_in_constraints[in_size] = constraint;
4828
4829                         ins[in_size] = expression_to_addr(expr);
4830                         ++in_size;
4831                         continue;
4832                 } else {
4833                         errorf(&statement->base.source_position,
4834                                "only modifiers but no place set in constraints '%s'",
4835                                constraints);
4836                         continue;
4837                 }
4838
4839                 ir_asm_constraint constraint;
4840                 constraint.pos        = pos;
4841                 constraint.constraint = new_id_from_str(constraints);
4842                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
4843
4844                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4845         }
4846         assert(obstack_object_size(&asm_obst)
4847                         == out_size * sizeof(ir_asm_constraint));
4848         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4849
4850
4851         obstack_grow(&asm_obst, tmp_in_constraints,
4852                      in_size * sizeof(tmp_in_constraints[0]));
4853         /* find and count input and output arguments */
4854         argument = statement->inputs;
4855         for ( ; argument != NULL; argument = argument->next) {
4856                 const char *constraints = argument->constraints.begin;
4857                 asm_constraint_flags_t asm_flags
4858                         = be_parse_asm_constraints(constraints);
4859
4860                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4861                         errorf(&statement->base.source_position,
4862                                "some constraints in '%s' are not supported", constraints);
4863                         continue;
4864                 }
4865                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4866                         errorf(&statement->base.source_position,
4867                                "some constraints in '%s' are invalid", constraints);
4868                         continue;
4869                 }
4870                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4871                         errorf(&statement->base.source_position,
4872                                "write flag specified for input constraints '%s'",
4873                                constraints);
4874                         continue;
4875                 }
4876
4877                 ir_node *input;
4878                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4879                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4880                         /* we can treat this as "normal" input */
4881                         input = expression_to_firm(argument->expression);
4882                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4883                         /* pure memory ops need no input (but we have to make sure we
4884                          * attach to the memory) */
4885                         assert(! (asm_flags &
4886                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4887                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4888                         needs_memory = true;
4889                         input = expression_to_addr(argument->expression);
4890                 } else {
4891                         errorf(&statement->base.source_position,
4892                                "only modifiers but no place set in constraints '%s'",
4893                                constraints);
4894                         continue;
4895                 }
4896
4897                 ir_asm_constraint constraint;
4898                 constraint.pos        = next_pos++;
4899                 constraint.constraint = new_id_from_str(constraints);
4900                 constraint.mode       = get_irn_mode(input);
4901
4902                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4903                 ins[in_size++] = input;
4904         }
4905
4906         ir_node *mem = needs_memory ? get_store() : new_NoMem();
4907         assert(obstack_object_size(&asm_obst)
4908                         == in_size * sizeof(ir_asm_constraint));
4909         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4910
4911         /* create asm node */
4912         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4913
4914         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4915
4916         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4917                                   out_size, output_constraints,
4918                                   n_clobbers, clobbers, asm_text);
4919
4920         if (statement->is_volatile) {
4921                 set_irn_pinned(node, op_pin_state_pinned);
4922         } else {
4923                 set_irn_pinned(node, op_pin_state_floats);
4924         }
4925
4926         /* create output projs & connect them */
4927         if (needs_memory) {
4928                 ir_node *projm = new_Proj(node, mode_M, out_size);
4929                 set_store(projm);
4930         }
4931
4932         size_t i;
4933         for (i = 0; i < out_size; ++i) {
4934                 const expression_t *out_expr = out_exprs[i];
4935                 long                pn       = i;
4936                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
4937                 ir_node            *proj     = new_Proj(node, mode, pn);
4938                 ir_node            *addr     = out_addrs[i];
4939
4940                 set_value_for_expression_addr(out_expr, proj, addr);
4941         }
4942
4943         return NULL;
4944 }
4945
4946 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4947 {
4948         statement_to_firm(statement->try_statement);
4949         source_position_t const *const pos = &statement->base.source_position;
4950         warningf(WARN_OTHER, pos, "structured exception handling ignored");
4951         return NULL;
4952 }
4953
4954 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4955 {
4956         errorf(&statement->base.source_position, "__leave not supported yet");
4957         return NULL;
4958 }
4959
4960 /**
4961  * Transform a statement.
4962  */
4963 static ir_node *statement_to_firm(statement_t *const stmt)
4964 {
4965 #ifndef NDEBUG
4966         assert(!stmt->base.transformed);
4967         stmt->base.transformed = true;
4968 #endif
4969
4970         switch (stmt->kind) {
4971         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
4972         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
4973         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
4974         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
4975         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
4976         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
4977         case STATEMENT_EMPTY:         return NULL; /* nothing */
4978         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
4979         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
4980         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
4981         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
4982         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
4983         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
4984         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
4985         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
4986         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
4987
4988         {
4989                 jump_target *tgt;
4990         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
4991         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
4992 jump:
4993                 jump_to_target(tgt);
4994                 set_unreachable_now();
4995                 return NULL;
4996         }
4997
4998         case STATEMENT_ERROR: panic("error statement");
4999         }
5000         panic("statement not implemented");
5001 }
5002
5003 static int count_local_variables(const entity_t *entity,
5004                                  const entity_t *const last)
5005 {
5006         int count = 0;
5007         entity_t const *const end = last != NULL ? last->base.next : NULL;
5008         for (; entity != end; entity = entity->base.next) {
5009                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5010                     !var_needs_entity(&entity->variable))
5011                         ++count;
5012         }
5013         return count;
5014 }
5015
5016 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5017 {
5018         int *const count = env;
5019
5020         switch (stmt->kind) {
5021         case STATEMENT_DECLARATION: {
5022                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5023                 *count += count_local_variables(decl_stmt->declarations_begin,
5024                                 decl_stmt->declarations_end);
5025                 break;
5026         }
5027
5028         case STATEMENT_FOR:
5029                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5030                 break;
5031
5032         default:
5033                 break;
5034         }
5035 }
5036
5037 /**
5038  * Return the number of local (alias free) variables used by a function.
5039  */
5040 static int get_function_n_local_vars(entity_t *entity)
5041 {
5042         const function_t *function = &entity->function;
5043         int count = 0;
5044
5045         /* count parameters */
5046         count += count_local_variables(function->parameters.entities, NULL);
5047
5048         /* count local variables declared in body */
5049         walk_statements(function->body, count_local_variables_in_stmt, &count);
5050         return count;
5051 }
5052
5053 /**
5054  * Build Firm code for the parameters of a function.
5055  */
5056 static void initialize_function_parameters(entity_t *entity)
5057 {
5058         assert(entity->kind == ENTITY_FUNCTION);
5059         ir_graph *irg             = current_ir_graph;
5060         ir_node  *args            = get_irg_args(irg);
5061         int       n               = 0;
5062         ir_type  *function_irtype;
5063
5064         if (entity->function.need_closure) {
5065                 /* add an extra parameter for the static link */
5066                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5067                 ++n;
5068
5069                 /* Matze: IMO this is wrong, nested functions should have an own
5070                  * type and not rely on strange parameters... */
5071                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5072         } else {
5073                 function_irtype = get_ir_type(entity->declaration.type);
5074         }
5075
5076
5077
5078         entity_t *parameter = entity->function.parameters.entities;
5079         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5080                 if (parameter->kind != ENTITY_PARAMETER)
5081                         continue;
5082
5083                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5084                 type_t *type = skip_typeref(parameter->declaration.type);
5085
5086                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.source_position);
5087                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5088                 if (var_needs_entity(&parameter->variable)) {
5089                         ir_type   *frame_type = get_irg_frame_type(irg);
5090                         ir_entity *param
5091                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5092                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5093                         parameter->variable.v.entity = param;
5094                         continue;
5095                 }
5096
5097                 ir_mode *param_mode = get_type_mode(param_irtype);
5098                 long     pn         = n;
5099                 ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5100
5101                 ir_mode *mode = get_ir_mode_storage(type);
5102                 value = create_conv(NULL, value, mode);
5103
5104                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5105                 parameter->variable.v.value_number = next_value_number_function;
5106                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5107                                         parameter);
5108                 ++next_value_number_function;
5109
5110                 set_value(parameter->variable.v.value_number, value);
5111         }
5112 }
5113
5114 static void add_function_pointer(ir_type *segment, ir_entity *method,
5115                                  const char *unique_template)
5116 {
5117         ir_type   *method_type  = get_entity_type(method);
5118         ir_type   *ptr_type     = new_type_pointer(method_type);
5119
5120         /* these entities don't really have a name but firm only allows
5121          * "" in ld_ident.
5122          * Note that we mustn't give these entities a name since for example
5123          * Mach-O doesn't allow them. */
5124         ident     *ide          = id_unique(unique_template);
5125         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5126         ir_graph  *irg          = get_const_code_irg();
5127         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5128                                                            method);
5129
5130         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5131         set_entity_compiler_generated(ptr, 1);
5132         set_entity_visibility(ptr, ir_visibility_private);
5133         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5134         set_atomic_ent_value(ptr, val);
5135 }
5136
5137 /**
5138  * Create code for a function and all inner functions.
5139  *
5140  * @param entity  the function entity
5141  */
5142 static void create_function(entity_t *entity)
5143 {
5144         assert(entity->kind == ENTITY_FUNCTION);
5145         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5146
5147         if (entity->function.body == NULL)
5148                 return;
5149
5150         inner_functions     = NULL;
5151         current_trampolines = NULL;
5152
5153         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5154                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5155                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5156         }
5157         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5158                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5159                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5160         }
5161
5162         current_function_entity = entity;
5163         current_function_name   = NULL;
5164         current_funcsig         = NULL;
5165
5166         assert(!ijmp_ops);
5167         assert(!ijmp_blocks);
5168         init_jump_target(&ijmp_target, NULL);
5169         ijmp_ops    = NEW_ARR_F(ir_node*, 0);
5170         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5171
5172         int       n_local_vars = get_function_n_local_vars(entity);
5173         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5174         current_ir_graph = irg;
5175
5176         ir_graph *old_current_function = current_function;
5177         current_function = irg;
5178
5179         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5180         current_vararg_entity = NULL;
5181
5182         set_irg_fp_model(irg, firm_fp_model);
5183         tarval_enable_fp_ops(1);
5184         set_irn_dbg_info(get_irg_start_block(irg),
5185                          get_entity_dbg_info(function_entity));
5186
5187         next_value_number_function = 0;
5188         initialize_function_parameters(entity);
5189         current_static_link = entity->function.static_link;
5190
5191         statement_to_firm(entity->function.body);
5192
5193         ir_node *end_block = get_irg_end_block(irg);
5194
5195         /* do we have a return statement yet? */
5196         if (currently_reachable()) {
5197                 type_t *type = skip_typeref(entity->declaration.type);
5198                 assert(is_type_function(type));
5199                 type_t *const return_type = skip_typeref(type->function.return_type);
5200
5201                 ir_node *ret;
5202                 if (is_type_void(return_type)) {
5203                         ret = new_Return(get_store(), 0, NULL);
5204                 } else {
5205                         ir_mode *const mode = get_ir_mode_storage(return_type);
5206
5207                         ir_node *in[1];
5208                         /* §5.1.2.2.3 main implicitly returns 0 */
5209                         if (is_main(entity)) {
5210                                 in[0] = new_Const(get_mode_null(mode));
5211                         } else {
5212                                 in[0] = new_Unknown(mode);
5213                         }
5214                         ret = new_Return(get_store(), 1, in);
5215                 }
5216                 add_immBlock_pred(end_block, ret);
5217         }
5218
5219         if (enter_jump_target(&ijmp_target)) {
5220                 size_t   const n    = ARR_LEN(ijmp_ops);
5221                 ir_node *const op   = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5222                 ir_node *const ijmp = new_IJmp(op);
5223                 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5224                         ir_node *const block = ijmp_blocks[i];
5225                         add_immBlock_pred(block, ijmp);
5226                         mature_immBlock(block);
5227                 }
5228         }
5229
5230         DEL_ARR_F(ijmp_ops);
5231         DEL_ARR_F(ijmp_blocks);
5232         ijmp_ops    = NULL;
5233         ijmp_blocks = NULL;
5234
5235         irg_finalize_cons(irg);
5236
5237         /* finalize the frame type */
5238         ir_type *frame_type = get_irg_frame_type(irg);
5239         int      n          = get_compound_n_members(frame_type);
5240         int      align_all  = 4;
5241         int      offset     = 0;
5242         for (int i = 0; i < n; ++i) {
5243                 ir_entity *member      = get_compound_member(frame_type, i);
5244                 ir_type   *entity_type = get_entity_type(member);
5245
5246                 int align = get_type_alignment_bytes(entity_type);
5247                 if (align > align_all)
5248                         align_all = align;
5249                 int misalign = 0;
5250                 if (align > 0) {
5251                         misalign  = offset % align;
5252                         if (misalign > 0) {
5253                                 offset += align - misalign;
5254                         }
5255                 }
5256
5257                 set_entity_offset(member, offset);
5258                 offset += get_type_size_bytes(entity_type);
5259         }
5260         set_type_size_bytes(frame_type, offset);
5261         set_type_alignment_bytes(frame_type, align_all);
5262
5263         irg_verify(irg, VERIFY_ENFORCE_SSA);
5264         current_vararg_entity = old_current_vararg_entity;
5265         current_function      = old_current_function;
5266
5267         if (current_trampolines != NULL) {
5268                 DEL_ARR_F(current_trampolines);
5269                 current_trampolines = NULL;
5270         }
5271
5272         /* create inner functions if any */
5273         entity_t **inner = inner_functions;
5274         if (inner != NULL) {
5275                 ir_type *rem_outer_frame      = current_outer_frame;
5276                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5277                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5278                         create_function(inner[i]);
5279                 }
5280                 DEL_ARR_F(inner);
5281
5282                 current_outer_frame      = rem_outer_frame;
5283         }
5284 }
5285
5286 static void scope_to_firm(scope_t *scope)
5287 {
5288         /* first pass: create declarations */
5289         entity_t *entity = scope->entities;
5290         for ( ; entity != NULL; entity = entity->base.next) {
5291                 if (entity->base.symbol == NULL)
5292                         continue;
5293
5294                 if (entity->kind == ENTITY_FUNCTION) {
5295                         if (entity->function.btk != BUILTIN_NONE) {
5296                                 /* builtins have no representation */
5297                                 continue;
5298                         }
5299                         (void)get_function_entity(entity, NULL);
5300                 } else if (entity->kind == ENTITY_VARIABLE) {
5301                         create_global_variable(entity);
5302                 } else if (entity->kind == ENTITY_NAMESPACE) {
5303                         scope_to_firm(&entity->namespacee.members);
5304                 }
5305         }
5306
5307         /* second pass: create code/initializers */
5308         entity = scope->entities;
5309         for ( ; entity != NULL; entity = entity->base.next) {
5310                 if (entity->base.symbol == NULL)
5311                         continue;
5312
5313                 if (entity->kind == ENTITY_FUNCTION) {
5314                         if (entity->function.btk != BUILTIN_NONE) {
5315                                 /* builtins have no representation */
5316                                 continue;
5317                         }
5318                         create_function(entity);
5319                 } else if (entity->kind == ENTITY_VARIABLE) {
5320                         assert(entity->declaration.kind
5321                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5322                         current_ir_graph = get_const_code_irg();
5323                         create_variable_initializer(entity);
5324                 }
5325         }
5326 }
5327
5328 void init_ast2firm(void)
5329 {
5330         obstack_init(&asm_obst);
5331         init_atomic_modes();
5332
5333         ir_set_debug_retrieve(dbg_retrieve);
5334         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5335
5336         /* create idents for all known runtime functions */
5337         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5338                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5339         }
5340
5341         entitymap_init(&entitymap);
5342 }
5343
5344 static void init_ir_types(void)
5345 {
5346         static int ir_types_initialized = 0;
5347         if (ir_types_initialized)
5348                 return;
5349         ir_types_initialized = 1;
5350
5351         ir_type_char    = get_ir_type(type_char);
5352         ir_type_wchar_t = get_ir_type(type_wchar_t);
5353
5354         be_params             = be_get_backend_param();
5355         mode_float_arithmetic = be_params->mode_float_arithmetic;
5356
5357         stack_param_align     = be_params->stack_param_align;
5358 }
5359
5360 void exit_ast2firm(void)
5361 {
5362         entitymap_destroy(&entitymap);
5363         obstack_free(&asm_obst, NULL);
5364 }
5365
5366 static void global_asm_to_firm(statement_t *s)
5367 {
5368         for (; s != NULL; s = s->base.next) {
5369                 assert(s->kind == STATEMENT_ASM);
5370
5371                 char const *const text = s->asms.asm_text.begin;
5372                 size_t      const size = s->asms.asm_text.size;
5373                 ident      *const id   = new_id_from_chars(text, size);
5374                 add_irp_asm(id);
5375         }
5376 }
5377
5378 static const char *get_cwd(void)
5379 {
5380         static char buf[1024];
5381         if (buf[0] == '\0') {
5382                 return getcwd(buf, sizeof(buf));
5383         }
5384         return buf;
5385 }
5386
5387 void translation_unit_to_firm(translation_unit_t *unit)
5388 {
5389         if (c_mode & _CXX) {
5390                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5391         } else if (c_mode & _C99) {
5392                 be_dwarf_set_source_language(DW_LANG_C99);
5393         } else if (c_mode & _C89) {
5394                 be_dwarf_set_source_language(DW_LANG_C89);
5395         } else {
5396                 be_dwarf_set_source_language(DW_LANG_C);
5397         }
5398         const char *cwd = get_cwd();
5399         if (cwd != NULL) {
5400                 be_dwarf_set_compilation_directory(cwd);
5401         }
5402
5403         /* initialize firm arithmetic */
5404         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5405         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5406
5407         /* just to be sure */
5408         init_jump_target(&break_target,    NULL);
5409         init_jump_target(&continue_target, NULL);
5410         current_switch           = NULL;
5411         current_translation_unit = unit;
5412
5413         init_ir_types();
5414
5415         scope_to_firm(&unit->scope);
5416         global_asm_to_firm(unit->global_asm);
5417
5418         current_ir_graph         = NULL;
5419         current_translation_unit = NULL;
5420 }