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
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int         next_value_number_function;
  75 static jump_target continue_target;
  76 static jump_target break_target;
  77 static ir_node    *current_switch;
  78 static bool        saw_default_label;
  79 static entity_t  **inner_functions;
  80 static jump_target ijmp_target;
  81 static ir_node   **ijmp_ops;
  82 static ir_node   **ijmp_blocks;
  83 static bool        constant_folding;
  84
  85 #define PUSH_BREAK(val) \
  86         jump_target const old_break_target = break_target; \
  87         (init_jump_target(&break_target, (val)))
  88 #define POP_BREAK() \
  89         ((void)(break_target = old_break_target))
  90
  91 #define PUSH_CONTINUE(val) \
  92         jump_target const old_continue_target = continue_target; \
  93         (init_jump_target(&continue_target, (val)))
  94 #define POP_CONTINUE() \
  95         ((void)(continue_target = old_continue_target))
  96
  97 #define PUSH_IRG(val) \
  98         ir_graph *const old_irg = current_ir_graph; \
  99         ir_graph *const new_irg = (val); \
 100         ((void)(current_ir_graph = new_irg))
 101
 102 #define POP_IRG() \
 103         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
 104
 105 static const entity_t     *current_function_entity;
 106 static ir_node            *current_function_name;
 107 static ir_node            *current_funcsig;
 108 static ir_graph           *current_function;
 109 static translation_unit_t *current_translation_unit;
 110 static trampoline_region  *current_trampolines;
 111 static ir_type            *current_outer_frame;
 112 static ir_node            *current_static_link;
 113 static ir_entity          *current_vararg_entity;
 114
 115 static entitymap_t  entitymap;
 116
 117 static struct obstack asm_obst;
 118
 119 typedef enum declaration_kind_t {
 120         DECLARATION_KIND_UNKNOWN,
 121         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 122         DECLARATION_KIND_GLOBAL_VARIABLE,
 123         DECLARATION_KIND_LOCAL_VARIABLE,
 124         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 125         DECLARATION_KIND_PARAMETER,
 126         DECLARATION_KIND_PARAMETER_ENTITY,
 127         DECLARATION_KIND_FUNCTION,
 128         DECLARATION_KIND_COMPOUND_MEMBER,
 129         DECLARATION_KIND_INNER_FUNCTION
 130 } declaration_kind_t;
 131
 132 static ir_type *get_ir_type_incomplete(type_t *type);
 133
 134 static void enqueue_inner_function(entity_t *entity)
 135 {
 136         if (inner_functions == NULL)
 137                 inner_functions = NEW_ARR_F(entity_t *, 0);
 138         ARR_APP1(entity_t*, inner_functions, entity);
 139 }
 140
 141 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 142 {
 143         const entity_t *entity = get_irg_loc_description(irg, pos);
 144
 145         if (entity != NULL) {
 146                 source_position_t const *const pos = &entity->base.source_position;
 147                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 148         }
 149         return new_r_Unknown(irg, mode);
 150 }
 151
 152 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 153 {
 154         source_position_t const *const pos = (source_position_t const*)dbg;
 155         if (pos) {
 156                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 157         } else {
 158                 return (src_loc_t){ NULL, 0, 0 };
 159         }
 160 }
 161
 162 static dbg_info *get_dbg_info(const source_position_t *pos)
 163 {
 164         return (dbg_info*) pos;
 165 }
 166
 167 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 168                                     const type_dbg_info *dbg)
 169 {
 170         assert(dbg != NULL);
 171         print_to_buffer(buffer, buffer_size);
 172         const type_t *type = (const type_t*) dbg;
 173         print_type(type);
 174         finish_print_to_buffer();
 175 }
 176
 177 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 178 {
 179         return (type_dbg_info*) type;
 180 }
 181
 182 /* is the current block a reachable one? */
 183 static bool currently_reachable(void)
 184 {
 185         ir_node *const block = get_cur_block();
 186         return block != NULL && !is_Bad(block);
 187 }
 188
 189 static void set_unreachable_now(void)
 190 {
 191         set_cur_block(NULL);
 192 }
 193
 194 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 195
 196 static ir_node *_expression_to_firm(const expression_t *expression);
 197 static ir_node *expression_to_firm(const expression_t *expression);
 198
 199 static unsigned decide_modulo_shift(unsigned type_size)
 200 {
 201         if (architecture_modulo_shift == 0)
 202                 return 0;
 203         if (type_size < architecture_modulo_shift)
 204                 return architecture_modulo_shift;
 205         return type_size;
 206 }
 207
 208 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 209 {
 210         unsigned flags = get_atomic_type_flags(kind);
 211         unsigned size  = get_atomic_type_size(kind);
 212         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 213             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 214                 switch (size) {
 215                 case 4:  return get_modeF();
 216                 case 8:  return get_modeD();
 217                 default: panic("unexpected kind");
 218                 }
 219         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 220                 char            name[64];
 221                 unsigned        bit_size     = size * 8;
 222                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 223                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 224
 225                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 226                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 227                                     modulo_shift);
 228         }
 229
 230         return NULL;
 231 }
 232
 233 /**
 234  * Initialises the atomic modes depending on the machine size.
 235  */
 236 static void init_atomic_modes(void)
 237 {
 238         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 239         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 240                 if (atomic_modes[i] != NULL)
 241                         continue;
 242                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 243         }
 244 }
 245
 246 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 247 {
 248         assert(kind <= ATOMIC_TYPE_LAST);
 249         return atomic_modes[kind];
 250 }
 251
 252 static ir_node *get_vla_size(array_type_t *const type)
 253 {
 254         ir_node *size_node = type->size_node;
 255         if (size_node == NULL) {
 256                 size_node = expression_to_firm(type->size_expression);
 257                 type->size_node = size_node;
 258         }
 259         return size_node;
 260 }
 261
 262 static unsigned count_parameters(const function_type_t *function_type)
 263 {
 264         unsigned count = 0;
 265
 266         function_parameter_t *parameter = function_type->parameters;
 267         for ( ; parameter != NULL; parameter = parameter->next) {
 268                 ++count;
 269         }
 270
 271         return count;
 272 }
 273
 274 /**
 275  * Creates a Firm type for an atomic type
 276  */
 277 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 278 {
 279         ir_mode        *mode      = atomic_modes[akind];
 280         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 281         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 282         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 283
 284         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 285         set_type_alignment_bytes(irtype, alignment);
 286
 287         return irtype;
 288 }
 289
 290 /**
 291  * Creates a Firm type for a complex type
 292  */
 293 static ir_type *create_complex_type(const atomic_type_t *type)
 294 {
 295         atomic_type_kind_t  kind = type->akind;
 296         ir_mode            *mode = atomic_modes[kind];
 297         ident              *id   = get_mode_ident(mode);
 298
 299         (void) id;
 300
 301         /* FIXME: finish the array */
 302         return NULL;
 303 }
 304
 305 /**
 306  * Creates a Firm type for an imaginary type
 307  */
 308 static ir_type *create_imaginary_type(const atomic_type_t *type)
 309 {
 310         return create_atomic_type(type->akind, (const type_t*)type);
 311 }
 312
 313 /**
 314  * return type of a parameter (and take transparent union gnu extension into
 315  * account)
 316  */
 317 static type_t *get_parameter_type(type_t *orig_type)
 318 {
 319         type_t *type = skip_typeref(orig_type);
 320         if (is_type_union(type)
 321                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 322                 compound_t *compound = type->compound.compound;
 323                 type                 = compound->members.entities->declaration.type;
 324         }
 325
 326         return type;
 327 }
 328
 329 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 330 {
 331         type_t        *return_type  = skip_typeref(function_type->return_type);
 332
 333         int            n_parameters = count_parameters(function_type)
 334                                        + (for_closure ? 1 : 0);
 335         int            n_results    = is_type_void(return_type) ? 0 : 1;
 336         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 337         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 338
 339         if (!is_type_void(return_type)) {
 340                 ir_type *restype = get_ir_type(return_type);
 341                 set_method_res_type(irtype, 0, restype);
 342         }
 343
 344         function_parameter_t *parameter = function_type->parameters;
 345         int                   n         = 0;
 346         if (for_closure) {
 347                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 348                 set_method_param_type(irtype, n, p_irtype);
 349                 ++n;
 350         }
 351         for ( ; parameter != NULL; parameter = parameter->next) {
 352                 type_t  *type     = get_parameter_type(parameter->type);
 353                 ir_type *p_irtype = get_ir_type(type);
 354                 set_method_param_type(irtype, n, p_irtype);
 355                 ++n;
 356         }
 357
 358         bool is_variadic = function_type->variadic;
 359
 360         if (is_variadic)
 361                 set_method_variadicity(irtype, variadicity_variadic);
 362
 363         unsigned cc = get_method_calling_convention(irtype);
 364         switch (function_type->calling_convention) {
 365         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 366         case CC_CDECL:
 367 is_cdecl:
 368                 set_method_calling_convention(irtype, SET_CDECL(cc));
 369                 break;
 370
 371         case CC_STDCALL:
 372                 if (is_variadic)
 373                         goto is_cdecl;
 374
 375                 /* only non-variadic function can use stdcall, else use cdecl */
 376                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 377                 break;
 378
 379         case CC_FASTCALL:
 380                 if (is_variadic)
 381                         goto is_cdecl;
 382                 /* only non-variadic function can use fastcall, else use cdecl */
 383                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 384                 break;
 385
 386         case CC_THISCALL:
 387                 /* Hmm, leave default, not accepted by the parser yet. */
 388                 break;
 389         }
 390
 391         if (for_closure)
 392                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 393
 394         const decl_modifiers_t modifiers = function_type->modifiers;
 395         if (modifiers & DM_CONST)
 396                 add_method_additional_properties(irtype, mtp_property_const);
 397         if (modifiers & DM_PURE)
 398                 add_method_additional_properties(irtype, mtp_property_pure);
 399         if (modifiers & DM_RETURNS_TWICE)
 400                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 401         if (modifiers & DM_NORETURN)
 402                 add_method_additional_properties(irtype, mtp_property_noreturn);
 403         if (modifiers & DM_NOTHROW)
 404                 add_method_additional_properties(irtype, mtp_property_nothrow);
 405         if (modifiers & DM_MALLOC)
 406                 add_method_additional_properties(irtype, mtp_property_malloc);
 407
 408         return irtype;
 409 }
 410
 411 static ir_type *create_pointer_type(pointer_type_t *type)
 412 {
 413         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 414         type_t        *points_to    = type->points_to;
 415         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 416         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 417
 418         return irtype;
 419 }
 420
 421 static ir_type *create_reference_type(reference_type_t *type)
 422 {
 423         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 424         type_t        *refers_to    = type->refers_to;
 425         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 426         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 427
 428         return irtype;
 429 }
 430
 431 static ir_type *create_array_type(array_type_t *type)
 432 {
 433         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 434         type_t        *element_type    = type->element_type;
 435         ir_type       *ir_element_type = get_ir_type(element_type);
 436         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 437
 438         const int align = get_type_alignment_bytes(ir_element_type);
 439         set_type_alignment_bytes(irtype, align);
 440
 441         if (type->size_constant) {
 442                 int n_elements = type->size;
 443
 444                 set_array_bounds_int(irtype, 0, 0, n_elements);
 445
 446                 size_t elemsize = get_type_size_bytes(ir_element_type);
 447                 if (elemsize % align > 0) {
 448                         elemsize += align - (elemsize % align);
 449                 }
 450                 set_type_size_bytes(irtype, n_elements * elemsize);
 451         } else {
 452                 set_array_lower_bound_int(irtype, 0, 0);
 453         }
 454         set_type_state(irtype, layout_fixed);
 455
 456         return irtype;
 457 }
 458
 459 /**
 460  * Return the signed integer type of size bits.
 461  *
 462  * @param size   the size
 463  */
 464 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 465                                                  unsigned size,
 466                                                                                                  const type_t *type)
 467 {
 468         static ir_mode *s_modes[64 + 1] = {NULL, };
 469         ir_type *res;
 470         ir_mode *mode;
 471
 472         if (size <= 0 || size > 64)
 473                 return NULL;
 474
 475         mode = s_modes[size];
 476         if (mode == NULL) {
 477                 char name[32];
 478
 479                 snprintf(name, sizeof(name), "bf_I%u", size);
 480                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 481                 s_modes[size] = mode;
 482         }
 483
 484         type_dbg_info *dbgi = get_type_dbg_info_(type);
 485         res                 = new_d_type_primitive(mode, dbgi);
 486         set_primitive_base_type(res, base_tp);
 487
 488         return res;
 489 }
 490
 491 /**
 492  * Return the unsigned integer type of size bits.
 493  *
 494  * @param size   the size
 495  */
 496 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 497                                                    unsigned size,
 498                                                                                                    const type_t *type)
 499 {
 500         static ir_mode *u_modes[64 + 1] = {NULL, };
 501         ir_type *res;
 502         ir_mode *mode;
 503
 504         if (size <= 0 || size > 64)
 505                 return NULL;
 506
 507         mode = u_modes[size];
 508         if (mode == NULL) {
 509                 char name[32];
 510
 511                 snprintf(name, sizeof(name), "bf_U%u", size);
 512                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 513                 u_modes[size] = mode;
 514         }
 515
 516         type_dbg_info *dbgi = get_type_dbg_info_(type);
 517         res = new_d_type_primitive(mode, dbgi);
 518         set_primitive_base_type(res, base_tp);
 519
 520         return res;
 521 }
 522
 523 static ir_type *create_bitfield_type(const entity_t *entity)
 524 {
 525         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 526         type_t *base = skip_typeref(entity->declaration.type);
 527         assert(is_type_integer(base));
 528         ir_type *irbase = get_ir_type(base);
 529
 530         unsigned bit_size = entity->compound_member.bit_size;
 531
 532         if (is_type_signed(base)) {
 533                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 534         } else {
 535                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 536         }
 537 }
 538
 539 /**
 540  * Construct firm type from ast struct type.
 541  */
 542 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 543 {
 544         compound_t *compound = type->compound;
 545
 546         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 547                 return compound->irtype;
 548         }
 549
 550         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 551
 552         symbol_t *type_symbol = compound->base.symbol;
 553         ident    *id;
 554         if (type_symbol != NULL) {
 555                 id = new_id_from_str(type_symbol->string);
 556         } else {
 557                 if (is_union) {
 558                         id = id_unique("__anonymous_union.%u");
 559                 } else {
 560                         id = id_unique("__anonymous_struct.%u");
 561                 }
 562         }
 563
 564         ir_type *irtype;
 565         if (is_union) {
 566                 irtype = new_type_union(id);
 567         } else {
 568                 irtype = new_type_struct(id);
 569         }
 570
 571         compound->irtype_complete = false;
 572         compound->irtype          = irtype;
 573
 574         if (incomplete)
 575                 return irtype;
 576
 577         if (is_union) {
 578                 layout_union_type(type);
 579         } else {
 580                 layout_struct_type(type);
 581         }
 582
 583         compound->irtype_complete = true;
 584
 585         entity_t *entry = compound->members.entities;
 586         for ( ; entry != NULL; entry = entry->base.next) {
 587                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 588                         continue;
 589
 590                 symbol_t *symbol     = entry->base.symbol;
 591                 type_t   *entry_type = entry->declaration.type;
 592                 ident    *ident;
 593                 if (symbol == NULL) {
 594                         /* anonymous bitfield member, skip */
 595                         if (entry->compound_member.bitfield)
 596                                 continue;
 597                         assert(is_type_compound(entry_type));
 598                         ident = id_unique("anon.%u");
 599                 } else {
 600                         ident = new_id_from_str(symbol->string);
 601                 }
 602
 603                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 604
 605                 ir_type *entry_irtype;
 606                 if (entry->compound_member.bitfield) {
 607                         entry_irtype = create_bitfield_type(entry);
 608                 } else {
 609                         entry_irtype = get_ir_type(entry_type);
 610                 }
 611                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 612
 613                 set_entity_offset(entity, entry->compound_member.offset);
 614                 set_entity_offset_bits_remainder(entity,
 615                                                  entry->compound_member.bit_offset);
 616
 617                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 618                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 619                 entry->compound_member.entity = entity;
 620         }
 621
 622         set_type_alignment_bytes(irtype, compound->alignment);
 623         set_type_size_bytes(irtype, compound->size);
 624         set_type_state(irtype, layout_fixed);
 625
 626         return irtype;
 627 }
 628
 629 void determine_enum_values(enum_type_t *const type)
 630 {
 631         ir_mode   *const mode    = atomic_modes[type->base.akind];
 632         ir_tarval *const one     = get_mode_one(mode);
 633         ir_tarval *      tv_next = get_mode_null(mode);
 634
 635         enum_t   *enume = type->enume;
 636         entity_t *entry = enume->base.next;
 637         for (; entry != NULL; entry = entry->base.next) {
 638                 if (entry->kind != ENTITY_ENUM_VALUE)
 639                         break;
 640
 641                 expression_t *const init = entry->enum_value.value;
 642                 if (init != NULL) {
 643                         tv_next = fold_constant_to_tarval(init);
 644                 }
 645                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 646                 entry->enum_value.tv = tv_next;
 647                 tv_next = tarval_add(tv_next, one);
 648         }
 649 }
 650
 651 static ir_type *create_enum_type(enum_type_t *const type)
 652 {
 653         return create_atomic_type(type->base.akind, (const type_t*) type);
 654 }
 655
 656 static ir_type *get_ir_type_incomplete(type_t *type)
 657 {
 658         type = skip_typeref(type);
 659
 660         if (type->base.firm_type != NULL) {
 661                 return type->base.firm_type;
 662         }
 663
 664         if (is_type_compound(type)) {
 665                 return create_compound_type(&type->compound, true);
 666         } else {
 667                 return get_ir_type(type);
 668         }
 669 }
 670
 671 ir_type *get_ir_type(type_t *type)
 672 {
 673         type = skip_typeref(type);
 674
 675         if (type->base.firm_type != NULL) {
 676                 return type->base.firm_type;
 677         }
 678
 679         ir_type *firm_type = NULL;
 680         switch (type->kind) {
 681         case TYPE_ATOMIC:
 682                 firm_type = create_atomic_type(type->atomic.akind, type);
 683                 break;
 684         case TYPE_COMPLEX:
 685                 firm_type = create_complex_type(&type->atomic);
 686                 break;
 687         case TYPE_IMAGINARY:
 688                 firm_type = create_imaginary_type(&type->atomic);
 689                 break;
 690         case TYPE_FUNCTION:
 691                 firm_type = create_method_type(&type->function, false);
 692                 break;
 693         case TYPE_POINTER:
 694                 firm_type = create_pointer_type(&type->pointer);
 695                 break;
 696         case TYPE_REFERENCE:
 697                 firm_type = create_reference_type(&type->reference);
 698                 break;
 699         case TYPE_ARRAY:
 700                 firm_type = create_array_type(&type->array);
 701                 break;
 702         case TYPE_COMPOUND_STRUCT:
 703         case TYPE_COMPOUND_UNION:
 704                 firm_type = create_compound_type(&type->compound, false);
 705                 break;
 706         case TYPE_ENUM:
 707                 firm_type = create_enum_type(&type->enumt);
 708                 break;
 709
 710         case TYPE_ERROR:
 711         case TYPE_TYPEOF:
 712         case TYPE_TYPEDEF:
 713                 break;
 714         }
 715         if (firm_type == NULL)
 716                 panic("unknown type found");
 717
 718         type->base.firm_type = firm_type;
 719         return firm_type;
 720 }
 721
 722 static ir_mode *get_ir_mode_storage(type_t *type)
 723 {
 724         type = skip_typeref(type);
 725
 726         /* Firm doesn't report a mode for arrays and structs/unions. */
 727         if (!is_type_scalar(type)) {
 728                 return mode_P_data;
 729         }
 730
 731         ir_type *const irtype = get_ir_type(type);
 732         ir_mode *const mode   = get_type_mode(irtype);
 733         assert(mode != NULL);
 734         return mode;
 735 }
 736
 737 /*
 738  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 739  * int that it returns bigger modes for floating point on some platforms
 740  * (x87 internally does arithemtic with 80bits)
 741  */
 742 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 743 {
 744         ir_mode *mode = get_ir_mode_storage(type);
 745         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 746                 return mode_float_arithmetic;
 747         }
 748
 749         return mode;
 750 }
 751
 752 /**
 753  * Return a node representing the size of a type.
 754  */
 755 static ir_node *get_type_size_node(type_t *type)
 756 {
 757         unsigned size;
 758         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 759         type = skip_typeref(type);
 760
 761         if (is_type_array(type) && type->array.is_vla) {
 762                 ir_node *size_node = get_vla_size(&type->array);
 763                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 764                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 765                 return real_size;
 766         }
 767
 768         size = get_type_size(type);
 769         return new_Const_long(mode, size);
 770 }
 771
 772 /** Names of the runtime functions. */
 773 static const struct {
 774         int        id;           /**< the rts id */
 775         int        n_res;        /**< number of return values */
 776         const char *name;        /**< the name of the rts function */
 777         int        n_params;     /**< number of parameters */
 778         unsigned   flags;        /**< language flags */
 779 } rts_data[] = {
 780         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 781         { rts_abort,      0, "abort",        0, _C89 },
 782         { rts_alloca,     1, "alloca",       1, _ALL },
 783         { rts_abs,        1, "abs",          1, _C89 },
 784         { rts_labs,       1, "labs",         1, _C89 },
 785         { rts_llabs,      1, "llabs",        1, _C99 },
 786         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 787
 788         { rts_fabs,       1, "fabs",         1, _C89 },
 789         { rts_sqrt,       1, "sqrt",         1, _C89 },
 790         { rts_cbrt,       1, "cbrt",         1, _C99 },
 791         { rts_exp,        1, "exp",          1, _C89 },
 792         { rts_exp2,       1, "exp2",         1, _C89 },
 793         { rts_exp10,      1, "exp10",        1, _GNUC },
 794         { rts_log,        1, "log",          1, _C89 },
 795         { rts_log2,       1, "log2",         1, _C89 },
 796         { rts_log10,      1, "log10",        1, _C89 },
 797         { rts_pow,        1, "pow",          2, _C89 },
 798         { rts_sin,        1, "sin",          1, _C89 },
 799         { rts_cos,        1, "cos",          1, _C89 },
 800         { rts_tan,        1, "tan",          1, _C89 },
 801         { rts_asin,       1, "asin",         1, _C89 },
 802         { rts_acos,       1, "acos",         1, _C89 },
 803         { rts_atan,       1, "atan",         1, _C89 },
 804         { rts_sinh,       1, "sinh",         1, _C89 },
 805         { rts_cosh,       1, "cosh",         1, _C89 },
 806         { rts_tanh,       1, "tanh",         1, _C89 },
 807
 808         { rts_fabsf,      1, "fabsf",        1, _C99 },
 809         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 810         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 811         { rts_expf,       1, "expf",         1, _C99 },
 812         { rts_exp2f,      1, "exp2f",        1, _C99 },
 813         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 814         { rts_logf,       1, "logf",         1, _C99 },
 815         { rts_log2f,      1, "log2f",        1, _C99 },
 816         { rts_log10f,     1, "log10f",       1, _C99 },
 817         { rts_powf,       1, "powf",         2, _C99 },
 818         { rts_sinf,       1, "sinf",         1, _C99 },
 819         { rts_cosf,       1, "cosf",         1, _C99 },
 820         { rts_tanf,       1, "tanf",         1, _C99 },
 821         { rts_asinf,      1, "asinf",        1, _C99 },
 822         { rts_acosf,      1, "acosf",        1, _C99 },
 823         { rts_atanf,      1, "atanf",        1, _C99 },
 824         { rts_sinhf,      1, "sinhf",        1, _C99 },
 825         { rts_coshf,      1, "coshf",        1, _C99 },
 826         { rts_tanhf,      1, "tanhf",        1, _C99 },
 827
 828         { rts_fabsl,      1, "fabsl",        1, _C99 },
 829         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 830         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 831         { rts_expl,       1, "expl",         1, _C99 },
 832         { rts_exp2l,      1, "exp2l",        1, _C99 },
 833         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 834         { rts_logl,       1, "logl",         1, _C99 },
 835         { rts_log2l,      1, "log2l",        1, _C99 },
 836         { rts_log10l,     1, "log10l",       1, _C99 },
 837         { rts_powl,       1, "powl",         2, _C99 },
 838         { rts_sinl,       1, "sinl",         1, _C99 },
 839         { rts_cosl,       1, "cosl",         1, _C99 },
 840         { rts_tanl,       1, "tanl",         1, _C99 },
 841         { rts_asinl,      1, "asinl",        1, _C99 },
 842         { rts_acosl,      1, "acosl",        1, _C99 },
 843         { rts_atanl,      1, "atanl",        1, _C99 },
 844         { rts_sinhl,      1, "sinhl",        1, _C99 },
 845         { rts_coshl,      1, "coshl",        1, _C99 },
 846         { rts_tanhl,      1, "tanhl",        1, _C99 },
 847
 848         { rts_strcmp,     1, "strcmp",       2, _C89 },
 849         { rts_strncmp,    1, "strncmp",      3, _C89 },
 850         { rts_strcpy,     1, "strcpy",       2, _C89 },
 851         { rts_strlen,     1, "strlen",       1, _C89 },
 852         { rts_memcpy,     1, "memcpy",       3, _C89 },
 853         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 854         { rts_memmove,    1, "memmove",      3, _C89 },
 855         { rts_memset,     1, "memset",       3, _C89 },
 856         { rts_memcmp,     1, "memcmp",       3, _C89 },
 857 };
 858
 859 static ident *rts_idents[lengthof(rts_data)];
 860
 861 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 862
 863 void set_create_ld_ident(ident *(*func)(entity_t*))
 864 {
 865         create_ld_ident = func;
 866 }
 867
 868 static bool declaration_is_definition(const entity_t *entity)
 869 {
 870         switch (entity->kind) {
 871         case ENTITY_VARIABLE:
 872                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 873         case ENTITY_FUNCTION:
 874                 return entity->function.body != NULL;
 875         case ENTITY_PARAMETER:
 876         case ENTITY_COMPOUND_MEMBER:
 877                 return false;
 878         case ENTITY_TYPEDEF:
 879         case ENTITY_ENUM:
 880         case ENTITY_ENUM_VALUE:
 881         case ENTITY_NAMESPACE:
 882         case ENTITY_LABEL:
 883         case ENTITY_LOCAL_LABEL:
 884                 break;
 885         }
 886         panic("entity is not a declaration");
 887 }
 888
 889 /**
 890  * Handle GNU attributes for entities
 891  *
 892  * @param ent   the entity
 893  * @param decl  the routine declaration
 894  */
 895 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 896 {
 897         assert(is_declaration(entity));
 898         decl_modifiers_t modifiers = entity->declaration.modifiers;
 899
 900         if (is_method_entity(irentity)) {
 901                 if (modifiers & DM_PURE)
 902                         add_entity_additional_properties(irentity, mtp_property_pure);
 903                 if (modifiers & DM_CONST)
 904                         add_entity_additional_properties(irentity, mtp_property_const);
 905                 if (modifiers & DM_NOINLINE)
 906                         add_entity_additional_properties(irentity, mtp_property_noinline);
 907                 if (modifiers & DM_FORCEINLINE)
 908                         add_entity_additional_properties(irentity, mtp_property_always_inline);
 909                 if (modifiers & DM_NAKED)
 910                         add_entity_additional_properties(irentity, mtp_property_naked);
 911                 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
 912                         add_entity_additional_properties(irentity,
 913                                                                                          mtp_property_inline_recommended);
 914         }
 915         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 916                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 917         }
 918         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 919             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 920                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 921         }
 922 }
 923
 924 static bool is_main(entity_t *entity)
 925 {
 926         static symbol_t *sym_main = NULL;
 927         if (sym_main == NULL) {
 928                 sym_main = symbol_table_insert("main");
 929         }
 930
 931         if (entity->base.symbol != sym_main)
 932                 return false;
 933         /* must be in outermost scope */
 934         if (entity->base.parent_scope != &current_translation_unit->scope)
 935                 return false;
 936
 937         return true;
 938 }
 939
 940 /**
 941  * Creates an entity representing a function.
 942  *
 943  * @param entity       the function declaration/definition
 944  * @param owner_type   the owner type of this function, NULL
 945  *                     for global functions
 946  */
 947 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 948 {
 949         assert(entity->kind == ENTITY_FUNCTION);
 950         if (entity->function.irentity != NULL)
 951                 return entity->function.irentity;
 952
 953         switch (entity->function.btk) {
 954         case BUILTIN_NONE:
 955         case BUILTIN_LIBC:
 956         case BUILTIN_LIBC_CHECK:
 957                 break;
 958         default:
 959                 return NULL;
 960         }
 961
 962         symbol_t *symbol = entity->base.symbol;
 963         ident    *id     = new_id_from_str(symbol->string);
 964
 965         /* already an entity defined? */
 966         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 967         bool const has_body = entity->function.body != NULL;
 968         if (irentity != NULL) {
 969                 goto entity_created;
 970         }
 971
 972         ir_type *ir_type_method;
 973         if (entity->function.need_closure)
 974                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 975         else
 976                 ir_type_method = get_ir_type(entity->declaration.type);
 977
 978         bool nested_function = false;
 979         if (owner_type == NULL)
 980                 owner_type = get_glob_type();
 981         else
 982                 nested_function = true;
 983
 984         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 985         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 986
 987         ident *ld_id;
 988         if (nested_function)
 989                 ld_id = id_unique("inner.%u");
 990         else
 991                 ld_id = create_ld_ident(entity);
 992         set_entity_ld_ident(irentity, ld_id);
 993
 994         handle_decl_modifiers(irentity, entity);
 995
 996         if (! nested_function) {
 997                 storage_class_tag_t const storage_class
 998                         = (storage_class_tag_t) entity->declaration.storage_class;
 999                 if (storage_class == STORAGE_CLASS_STATIC) {
1000                     set_entity_visibility(irentity, ir_visibility_local);
1001                 } else {
1002                     set_entity_visibility(irentity, ir_visibility_external);
1003                 }
1004
1005                 bool const is_inline = entity->function.is_inline;
1006                 if (is_inline && has_body) {
1007                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1008                             || ((c_mode & _C99) == 0
1009                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1010                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1011                         }
1012                 }
1013         } else {
1014                 /* nested functions are always local */
1015                 set_entity_visibility(irentity, ir_visibility_local);
1016         }
1017
1018         /* We should check for file scope here, but as long as we compile C only
1019            this is not needed. */
1020         if (!freestanding && !has_body) {
1021                 /* check for a known runtime function */
1022                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1023                         if (id != rts_idents[i])
1024                                 continue;
1025
1026                         function_type_t *function_type
1027                                 = &entity->declaration.type->function;
1028                         /* rts_entities code can't handle a "wrong" number of parameters */
1029                         if (function_type->unspecified_parameters)
1030                                 continue;
1031
1032                         /* check number of parameters */
1033                         int n_params = count_parameters(function_type);
1034                         if (n_params != rts_data[i].n_params)
1035                                 continue;
1036
1037                         type_t *return_type = skip_typeref(function_type->return_type);
1038                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1039                         if (n_res != rts_data[i].n_res)
1040                                 continue;
1041
1042                         /* ignore those rts functions not necessary needed for current mode */
1043                         if ((c_mode & rts_data[i].flags) == 0)
1044                                 continue;
1045                         assert(rts_entities[rts_data[i].id] == NULL);
1046                         rts_entities[rts_data[i].id] = irentity;
1047                 }
1048         }
1049
1050         entitymap_insert(&entitymap, symbol, irentity);
1051
1052 entity_created:
1053         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1054         entity->function.irentity = irentity;
1055
1056         return irentity;
1057 }
1058
1059 /**
1060  * Creates a SymConst for a given entity.
1061  *
1062  * @param dbgi    debug info
1063  * @param entity  the entity
1064  */
1065 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1066 {
1067         assert(entity != NULL);
1068         union symconst_symbol sym;
1069         sym.entity_p = entity;
1070         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1071 }
1072
1073 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1074 {
1075         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1076 }
1077
1078 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1079                                    ir_mode *dest_mode)
1080 {
1081         if (is_Const(value)) {
1082                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1083         }
1084
1085         ir_node *cond       = new_d_Cond(dbgi, value);
1086         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1087         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1088         ir_node *tblock     = new_Block(1, &proj_true);
1089         ir_node *fblock     = new_Block(1, &proj_false);
1090         set_cur_block(tblock);
1091         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1092         ir_node *tjump  = new_Jmp();
1093         set_cur_block(fblock);
1094         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1095         ir_node *fjump  = new_Jmp();
1096
1097         ir_node *in[2]      = { tjump, fjump };
1098         ir_node *mergeblock = new_Block(2, in);
1099         set_cur_block(mergeblock);
1100         ir_node *phi_in[2]  = { const1, const0 };
1101         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1102         return phi;
1103 }
1104
1105 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1106 {
1107         ir_mode *value_mode = get_irn_mode(value);
1108
1109         if (value_mode == dest_mode)
1110                 return value;
1111
1112         if (dest_mode == mode_b) {
1113                 ir_node *zero = new_Const(get_mode_null(value_mode));
1114                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1115                 return cmp;
1116         } else if (value_mode == mode_b) {
1117                 return create_conv_from_b(dbgi, value, dest_mode);
1118         }
1119
1120         return new_d_Conv(dbgi, value, dest_mode);
1121 }
1122
1123 /**
1124  * Creates a SymConst node representing a string constant.
1125  *
1126  * @param src_pos    the source position of the string constant
1127  * @param id_prefix  a prefix for the name of the generated string constant
1128  * @param value      the value of the string constant
1129  */
1130 static ir_node *string_to_firm(source_position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1131 {
1132         size_t            const slen        = get_string_len(value) + 1;
1133         ir_initializer_t *const initializer = create_initializer_compound(slen);
1134         ir_type          *      elem_type;
1135         switch (value->encoding) {
1136         case STRING_ENCODING_CHAR:
1137         case STRING_ENCODING_UTF8: {
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         {
1151                 type_t *type;
1152         case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1153         case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1154         case STRING_ENCODING_WIDE:   type = type_wchar_t;  goto init_wide;
1155 init_wide:;
1156                 elem_type = get_ir_type(type);
1157
1158                 ir_mode *const mode = get_type_mode(elem_type);
1159                 char const    *p    = value->begin;
1160                 for (size_t i = 0; i < slen; ++i) {
1161                         assert(p <= value->begin + value->size);
1162                         utf32             v   = read_utf8_char(&p);
1163                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1164                         ir_initializer_t *val = create_initializer_tarval(tv);
1165                         set_initializer_compound_value(initializer, i, val);
1166                 }
1167                 goto finish;
1168         }
1169         }
1170         panic("invalid string encoding");
1171
1172 finish:;
1173         ir_type *const type = new_type_array(1, elem_type);
1174         set_array_bounds_int(type, 0, 0, slen);
1175         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1176         set_type_state(      type, layout_fixed);
1177
1178         ir_type   *const global_type = get_glob_type();
1179         ident     *const id          = id_unique(id_prefix);
1180         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1181         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1182         set_entity_ld_ident(   entity, id);
1183         set_entity_visibility( entity, ir_visibility_private);
1184         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1185         set_entity_initializer(entity, initializer);
1186
1187         return create_symconst(dbgi, entity);
1188 }
1189
1190 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1191 {
1192         assert(type->kind == TYPE_ATOMIC);
1193         atomic_type_kind_t akind = type->atomic.akind;
1194
1195         ir_mode    *const mode = atomic_modes[akind];
1196         char const *const str  = literal->value.begin;
1197         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1198         if (tv == tarval_bad)
1199                 return false;
1200
1201         literal->base.type    = type;
1202         literal->target_value = tv;
1203         return true;
1204 }
1205
1206 void determine_literal_type(literal_expression_t *const literal)
1207 {
1208         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1209
1210         /* -1: signed only, 0: any, 1: unsigned only */
1211         int const sign =
1212                 !is_type_signed(literal->base.type) ? 1 :
1213                 literal->value.begin[0] == '0'      ? 0 :
1214                 -1; /* Decimal literals only try signed types. */
1215
1216         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1217         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1218
1219         if (try_create_integer(literal, literal->base.type))
1220                 goto finished;
1221
1222         /* now try if the constant is small enough for some types */
1223         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1224                 goto finished;
1225         if (sign <= 0 && try_create_integer(literal, type_long))
1226                 goto finished;
1227         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1228                 goto finished;
1229         /* last try? then we should not report tarval_bad */
1230         if (sign < 0)
1231                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1232         if (sign <= 0 && try_create_integer(literal, type_long_long))
1233                 goto finished;
1234
1235         /* last try */
1236         assert(sign >= 0);
1237         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1238         bool res = try_create_integer(literal, type_unsigned_long_long);
1239         if (!res)
1240                 panic("internal error when parsing number literal");
1241
1242 finished:
1243         tarval_set_integer_overflow_mode(old_mode);
1244 }
1245
1246 /**
1247  * Creates a Const node representing a constant.
1248  */
1249 static ir_node *literal_to_firm(const literal_expression_t *literal)
1250 {
1251         type_t     *type   = skip_typeref(literal->base.type);
1252         ir_mode    *mode   = get_ir_mode_storage(type);
1253         const char *string = literal->value.begin;
1254         size_t      size   = literal->value.size;
1255         ir_tarval  *tv;
1256
1257         switch (literal->base.kind) {
1258         case EXPR_LITERAL_INTEGER:
1259                 assert(literal->target_value != NULL);
1260                 tv = literal->target_value;
1261                 break;
1262
1263         case EXPR_LITERAL_FLOATINGPOINT:
1264                 tv = new_tarval_from_str(string, size, mode);
1265                 break;
1266
1267         case EXPR_LITERAL_BOOLEAN:
1268                 if (string[0] == 't') {
1269                         tv = get_mode_one(mode);
1270                 } else {
1271                         assert(string[0] == 'f');
1272         case EXPR_LITERAL_MS_NOOP:
1273                         tv = get_mode_null(mode);
1274                 }
1275                 break;
1276
1277         default:
1278                 panic("invalid literal kind");
1279         }
1280
1281         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1282         ir_node  *res        = new_d_Const(dbgi, tv);
1283         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1284         return create_conv(dbgi, res, mode_arith);
1285 }
1286
1287 /**
1288  * Creates a Const node representing a character constant.
1289  */
1290 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1291 {
1292         type_t     *type   = skip_typeref(literal->base.type);
1293         ir_mode    *mode   = get_ir_mode_storage(type);
1294         const char *string = literal->value.begin;
1295         size_t      size   = literal->value.size;
1296         ir_tarval  *tv;
1297
1298         switch (literal->value.encoding) {
1299         case STRING_ENCODING_WIDE: {
1300                 utf32  v = read_utf8_char(&string);
1301                 char   buf[128];
1302                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1303
1304                 tv = new_tarval_from_str(buf, len, mode);
1305                 break;
1306         }
1307
1308         case STRING_ENCODING_CHAR: {
1309                 long long int v;
1310                 bool char_is_signed
1311                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1312                 if (size == 1 && char_is_signed) {
1313                         v = (signed char)string[0];
1314                 } else {
1315                         v = 0;
1316                         for (size_t i = 0; i < size; ++i) {
1317                                 v = (v << 8) | ((unsigned char)string[i]);
1318                         }
1319                 }
1320                 char   buf[128];
1321                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1322
1323                 tv = new_tarval_from_str(buf, len, mode);
1324                 break;
1325         }
1326
1327         default:
1328                 panic("invalid literal kind");
1329         }
1330
1331         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1332         ir_node  *res        = new_d_Const(dbgi, tv);
1333         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1334         return create_conv(dbgi, res, mode_arith);
1335 }
1336
1337 /*
1338  * Allocate an area of size bytes aligned at alignment
1339  * at a frame type.
1340  */
1341 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1342 {
1343         static unsigned area_cnt = 0;
1344         char buf[32];
1345
1346         ir_type *tp = new_type_array(1, ir_type_char);
1347         set_array_bounds_int(tp, 0, 0, size);
1348         set_type_alignment_bytes(tp, alignment);
1349
1350         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1351         ident *name = new_id_from_str(buf);
1352         ir_entity *area = new_entity(frame_type, name, tp);
1353
1354         /* mark this entity as compiler generated */
1355         set_entity_compiler_generated(area, 1);
1356         return area;
1357 }
1358
1359 /**
1360  * Return a node representing a trampoline region
1361  * for a given function entity.
1362  *
1363  * @param dbgi    debug info
1364  * @param entity  the function entity
1365  */
1366 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1367 {
1368         ir_entity *region = NULL;
1369         int        i;
1370
1371         if (current_trampolines != NULL) {
1372                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1373                         if (current_trampolines[i].function == entity) {
1374                                 region = current_trampolines[i].region;
1375                                 break;
1376                         }
1377                 }
1378         } else {
1379                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1380         }
1381         ir_graph *irg = current_ir_graph;
1382         if (region == NULL) {
1383                 /* create a new region */
1384                 ir_type           *frame_tp = get_irg_frame_type(irg);
1385                 trampoline_region  reg;
1386                 reg.function = entity;
1387
1388                 reg.region   = alloc_trampoline(frame_tp,
1389                                                 be_params->trampoline_size,
1390                                                 be_params->trampoline_align);
1391                 ARR_APP1(trampoline_region, current_trampolines, reg);
1392                 region = reg.region;
1393         }
1394         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1395                                region);
1396 }
1397
1398 /**
1399  * Creates a trampoline for a function represented by an entity.
1400  *
1401  * @param dbgi    debug info
1402  * @param mode    the (reference) mode for the function address
1403  * @param entity  the function entity
1404  */
1405 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1406                                   ir_entity *entity)
1407 {
1408         assert(entity != NULL);
1409         ir_node *in[3];
1410         in[0] = get_trampoline_region(dbgi, entity);
1411         in[1] = create_symconst(dbgi, entity);
1412         in[2] = get_irg_frame(current_ir_graph);
1413
1414         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1415         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1416         return new_Proj(irn, mode, pn_Builtin_max+1);
1417 }
1418
1419 /**
1420  * Dereference an address.
1421  *
1422  * @param dbgi  debug info
1423  * @param type  the type of the dereferenced result (the points_to type)
1424  * @param addr  the address to dereference
1425  */
1426 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1427                                       ir_node *const addr)
1428 {
1429         type_t *skipped = skip_typeref(type);
1430         if (is_type_incomplete(skipped))
1431                 return addr;
1432
1433         ir_type *irtype = get_ir_type(skipped);
1434         if (is_compound_type(irtype)
1435             || is_Method_type(irtype)
1436             || is_Array_type(irtype)) {
1437                 return addr;
1438         }
1439
1440         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1441                                   ? cons_volatile : cons_none;
1442         ir_mode *const mode     = get_type_mode(irtype);
1443         ir_node *const memory   = get_store();
1444         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1445         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1446         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1447
1448         set_store(load_mem);
1449
1450         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1451         return create_conv(dbgi, load_res, mode_arithmetic);
1452 }
1453
1454 /**
1455  * Returns the correct base address depending on whether it is a parameter or a
1456  * normal local variable.
1457  */
1458 static ir_node *get_local_frame(ir_entity *const ent)
1459 {
1460         ir_graph      *const irg   = current_ir_graph;
1461         const ir_type *const owner = get_entity_owner(ent);
1462         if (owner == current_outer_frame) {
1463                 assert(current_static_link != NULL);
1464                 return current_static_link;
1465         } else {
1466                 return get_irg_frame(irg);
1467         }
1468 }
1469
1470 /**
1471  * Keep the current block and memory.
1472  * This is necessary for all loops, because they could become infinite.
1473  */
1474 static void keep_loop(void)
1475 {
1476         keep_alive(get_cur_block());
1477         keep_alive(get_store());
1478 }
1479
1480 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1481 {
1482         entity_t *entity = ref->entity;
1483         if (entity->enum_value.tv == NULL) {
1484                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1485                 assert(type->kind == TYPE_ENUM);
1486                 determine_enum_values(&type->enumt);
1487         }
1488
1489         return new_Const(entity->enum_value.tv);
1490 }
1491
1492 static ir_node *reference_addr(const reference_expression_t *ref)
1493 {
1494         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1495         entity_t *entity = ref->entity;
1496         assert(is_declaration(entity));
1497
1498         if (entity->kind == ENTITY_FUNCTION
1499             && entity->function.btk != BUILTIN_NONE) {
1500                 ir_entity *irentity = get_function_entity(entity, NULL);
1501                 /* for gcc compatibility we have to produce (dummy) addresses for some
1502                  * builtins which don't have entities */
1503                 if (irentity == NULL) {
1504                         source_position_t const *const pos = &ref->base.source_position;
1505                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1506
1507                         /* simply create a NULL pointer */
1508                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1509                         ir_node  *res  = new_Const(get_mode_null(mode));
1510
1511                         return res;
1512                 }
1513         }
1514
1515         switch((declaration_kind_t) entity->declaration.kind) {
1516         case DECLARATION_KIND_UNKNOWN:
1517                 break;
1518         case DECLARATION_KIND_PARAMETER:
1519         case DECLARATION_KIND_LOCAL_VARIABLE:
1520                 /* you can store to a local variable (so we don't panic but return NULL
1521                  * as an indicator for no real address) */
1522                 return NULL;
1523         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1524                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1525                 return addr;
1526         }
1527
1528         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1529         case DECLARATION_KIND_PARAMETER_ENTITY: {
1530                 ir_entity *irentity = entity->variable.v.entity;
1531                 ir_node   *frame    = get_local_frame(irentity);
1532                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1533                 return sel;
1534         }
1535
1536         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1537                 return entity->variable.v.vla_base;
1538
1539         case DECLARATION_KIND_FUNCTION: {
1540                 return create_symconst(dbgi, entity->function.irentity);
1541         }
1542
1543         case DECLARATION_KIND_INNER_FUNCTION: {
1544                 type_t  *const type = skip_typeref(entity->declaration.type);
1545                 ir_mode *const mode = get_ir_mode_storage(type);
1546                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1547                         /* inner function not using the closure */
1548                         return create_symconst(dbgi, entity->function.irentity);
1549                 } else {
1550                         /* need trampoline here */
1551                         return create_trampoline(dbgi, mode, entity->function.irentity);
1552                 }
1553         }
1554
1555         case DECLARATION_KIND_COMPOUND_MEMBER:
1556                 panic("not implemented reference type");
1557         }
1558
1559         panic("reference to declaration with unknown type");
1560 }
1561
1562 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1563 {
1564         dbg_info *const dbgi   = get_dbg_info(&ref->base.source_position);
1565         entity_t *const entity = ref->entity;
1566         assert(is_declaration(entity));
1567
1568         switch ((declaration_kind_t)entity->declaration.kind) {
1569         case DECLARATION_KIND_LOCAL_VARIABLE:
1570         case DECLARATION_KIND_PARAMETER: {
1571                 type_t  *const type  = skip_typeref(entity->declaration.type);
1572                 ir_mode *const mode  = get_ir_mode_storage(type);
1573                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1574                 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1575         }
1576
1577         default: {
1578                 ir_node *const addr = reference_addr(ref);
1579                 return deref_address(dbgi, entity->declaration.type, addr);
1580         }
1581         }
1582 }
1583
1584 /**
1585  * Transform calls to builtin functions.
1586  */
1587 static ir_node *process_builtin_call(const call_expression_t *call)
1588 {
1589         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1590
1591         assert(call->function->kind == EXPR_REFERENCE);
1592         reference_expression_t *builtin = &call->function->reference;
1593
1594         type_t *expr_type = skip_typeref(builtin->base.type);
1595         assert(is_type_pointer(expr_type));
1596
1597         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1598
1599         switch (builtin->entity->function.btk) {
1600         case BUILTIN_NONE:
1601                 break;
1602         case BUILTIN_ALLOCA: {
1603                 expression_t *argument = call->arguments->expression;
1604                 ir_node      *size     = expression_to_firm(argument);
1605
1606                 ir_node *store  = get_store();
1607                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1608                                               stack_alloc);
1609                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1610                 set_store(proj_m);
1611                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1612
1613                 return res;
1614         }
1615         case BUILTIN_INF: {
1616                 type_t    *type = function_type->function.return_type;
1617                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1618                 ir_tarval *tv   = get_mode_infinite(mode);
1619                 ir_node   *res  = new_d_Const(dbgi, tv);
1620                 return res;
1621         }
1622         case BUILTIN_NAN: {
1623                 /* Ignore string for now... */
1624                 assert(is_type_function(function_type));
1625                 type_t    *type = function_type->function.return_type;
1626                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1627                 ir_tarval *tv   = get_mode_NAN(mode);
1628                 ir_node   *res  = new_d_Const(dbgi, tv);
1629                 return res;
1630         }
1631         case BUILTIN_EXPECT: {
1632                 expression_t *argument = call->arguments->expression;
1633                 return _expression_to_firm(argument);
1634         }
1635         case BUILTIN_VA_END:
1636                 /* evaluate the argument of va_end for its side effects */
1637                 _expression_to_firm(call->arguments->expression);
1638                 return NULL;
1639         case BUILTIN_OBJECT_SIZE: {
1640                 /* determine value of "type" */
1641                 expression_t *type_expression = call->arguments->next->expression;
1642                 long          type_val        = fold_constant_to_int(type_expression);
1643                 type_t       *type            = function_type->function.return_type;
1644                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1645                 /* just produce a "I don't know" result */
1646                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1647                                                 get_mode_minus_one(mode);
1648
1649                 return new_d_Const(dbgi, result);
1650         }
1651         case BUILTIN_ROTL: {
1652                 ir_node *val  = expression_to_firm(call->arguments->expression);
1653                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1654                 ir_mode *mode = get_irn_mode(val);
1655                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1656                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1657         }
1658         case BUILTIN_ROTR: {
1659                 ir_node *val  = expression_to_firm(call->arguments->expression);
1660                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1661                 ir_mode *mode = get_irn_mode(val);
1662                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1663                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1664                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1665                 return new_d_Rotl(dbgi, val, sub, mode);
1666         }
1667         case BUILTIN_FIRM:
1668                 break;
1669         case BUILTIN_LIBC:
1670         case BUILTIN_LIBC_CHECK:
1671                 panic("builtin did not produce an entity");
1672         }
1673         panic("invalid builtin");
1674 }
1675
1676 /**
1677  * Transform a call expression.
1678  * Handles some special cases, like alloca() calls, which must be resolved
1679  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1680  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1681  * handled right...
1682  */
1683 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1684 {
1685         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1686         assert(currently_reachable());
1687
1688         expression_t   *function = call->function;
1689         ir_node        *callee   = NULL;
1690         bool            firm_builtin = false;
1691         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1692         if (function->kind == EXPR_REFERENCE) {
1693                 const reference_expression_t *ref    = &function->reference;
1694                 entity_t                     *entity = ref->entity;
1695
1696                 if (entity->kind == ENTITY_FUNCTION) {
1697                         builtin_kind_t builtin = entity->function.btk;
1698                         if (builtin == BUILTIN_FIRM) {
1699                                 firm_builtin = true;
1700                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1701                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1702                                    && builtin != BUILTIN_LIBC_CHECK) {
1703                                 return process_builtin_call(call);
1704                         }
1705                 }
1706         }
1707         if (!firm_builtin)
1708                 callee = expression_to_firm(function);
1709
1710         type_t *type = skip_typeref(function->base.type);
1711         assert(is_type_pointer(type));
1712         pointer_type_t *pointer_type = &type->pointer;
1713         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1714         assert(is_type_function(points_to));
1715         function_type_t *function_type = &points_to->function;
1716
1717         int      n_parameters    = 0;
1718         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1719         ir_type *new_method_type = NULL;
1720         if (function_type->variadic || function_type->unspecified_parameters) {
1721                 const call_argument_t *argument = call->arguments;
1722                 for ( ; argument != NULL; argument = argument->next) {
1723                         ++n_parameters;
1724                 }
1725
1726                 /* we need to construct a new method type matching the call
1727                  * arguments... */
1728                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1729                 int n_res       = get_method_n_ress(ir_method_type);
1730                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1731                 set_method_calling_convention(new_method_type,
1732                                get_method_calling_convention(ir_method_type));
1733                 set_method_additional_properties(new_method_type,
1734                                get_method_additional_properties(ir_method_type));
1735                 set_method_variadicity(new_method_type,
1736                                        get_method_variadicity(ir_method_type));
1737
1738                 for (int i = 0; i < n_res; ++i) {
1739                         set_method_res_type(new_method_type, i,
1740                                             get_method_res_type(ir_method_type, i));
1741                 }
1742                 argument = call->arguments;
1743                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1744                         expression_t *expression = argument->expression;
1745                         ir_type      *irtype     = get_ir_type(expression->base.type);
1746                         set_method_param_type(new_method_type, i, irtype);
1747                 }
1748                 ir_method_type = new_method_type;
1749         } else {
1750                 n_parameters = get_method_n_params(ir_method_type);
1751         }
1752
1753         ir_node *in[n_parameters];
1754
1755         const call_argument_t *argument = call->arguments;
1756         for (int n = 0; n < n_parameters; ++n) {
1757                 expression_t *expression = argument->expression;
1758                 ir_node      *arg_node   = expression_to_firm(expression);
1759
1760                 type_t *arg_type = skip_typeref(expression->base.type);
1761                 if (!is_type_compound(arg_type)) {
1762                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1763                         arg_node = create_conv(dbgi, arg_node, mode);
1764                 }
1765
1766                 in[n] = arg_node;
1767
1768                 argument = argument->next;
1769         }
1770
1771         ir_node *store;
1772         if (function_type->modifiers & DM_CONST) {
1773                 store = get_irg_no_mem(current_ir_graph);
1774         } else {
1775                 store = get_store();
1776         }
1777
1778         ir_node *node;
1779         type_t  *return_type = skip_typeref(function_type->return_type);
1780         ir_node *result      = NULL;
1781         if (firm_builtin) {
1782                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1783                                      ir_method_type);
1784                 if (! (function_type->modifiers & DM_CONST)) {
1785                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1786                         set_store(mem);
1787                 }
1788
1789                 if (!is_type_void(return_type)) {
1790                         assert(is_type_scalar(return_type));
1791                         ir_mode *mode = get_ir_mode_storage(return_type);
1792                         result = new_Proj(node, mode, pn_Builtin_max+1);
1793                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1794                         result              = create_conv(NULL, result, mode_arith);
1795                 }
1796         } else {
1797                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1798                 if (! (function_type->modifiers & DM_CONST)) {
1799                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1800                         set_store(mem);
1801                 }
1802
1803                 if (!is_type_void(return_type)) {
1804                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1805                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1806                         result                    = new_Proj(resproj, mode, 0);
1807                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1808                         result                    = create_conv(NULL, result, mode_arith);
1809                 }
1810         }
1811
1812         if (function_type->modifiers & DM_NORETURN) {
1813                 /* A dead end:  Keep the Call and the Block.  Also place all further
1814                  * nodes into a new and unreachable block. */
1815                 keep_alive(node);
1816                 keep_alive(get_cur_block());
1817                 ir_node *block = new_Block(0, NULL);
1818                 set_cur_block(block);
1819         }
1820
1821         return result;
1822 }
1823
1824 static ir_node *statement_to_firm(statement_t *statement);
1825 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1826
1827 static ir_node *expression_to_addr(const expression_t *expression);
1828 static ir_node *create_condition_evaluation(expression_t const *expression, jump_target *true_target, jump_target *false_target);
1829
1830 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1831                          ir_node *value)
1832 {
1833         if (!is_type_compound(type)) {
1834                 ir_mode *mode = get_ir_mode_storage(type);
1835                 value         = create_conv(dbgi, value, mode);
1836         }
1837
1838         ir_node *memory = get_store();
1839
1840         if (is_type_scalar(type)) {
1841                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1842                                       ? cons_volatile : cons_none;
1843                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1844                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1845                 set_store(store_mem);
1846         } else {
1847                 ir_type *irtype    = get_ir_type(type);
1848                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1849                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1850                 set_store(copyb_mem);
1851         }
1852 }
1853
1854 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1855 {
1856         ir_tarval *all_one   = get_mode_all_one(mode);
1857         int        mode_size = get_mode_size_bits(mode);
1858         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1859
1860         assert(offset >= 0);
1861         assert(size   >= 0);
1862         assert(offset + size <= mode_size);
1863         if (size == mode_size) {
1864                 return all_one;
1865         }
1866
1867         long       shiftr    = get_mode_size_bits(mode) - size;
1868         long       shiftl    = offset;
1869         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1870         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1871         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1872         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1873
1874         return mask1;
1875 }
1876
1877 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1878                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1879                 bool need_return)
1880 {
1881         ir_type *entity_type = get_entity_type(entity);
1882         ir_type *base_type   = get_primitive_base_type(entity_type);
1883         ir_mode *mode        = get_type_mode(base_type);
1884         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1885
1886         value = create_conv(dbgi, value, mode);
1887
1888         /* kill upper bits of value and shift to right position */
1889         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1890         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1891         unsigned  base_bits  = get_mode_size_bits(mode);
1892         unsigned  shiftwidth = base_bits - bitsize;
1893
1894         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1895         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1896
1897         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1898         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1899         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1900
1901         /* load current value */
1902         ir_node   *mem             = get_store();
1903         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1904                                           set_volatile ? cons_volatile : cons_none);
1905         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1906         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1907         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1908         ir_tarval *inv_mask        = tarval_not(shift_mask);
1909         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1910         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1911
1912         /* construct new value and store */
1913         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1914         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1915                                          set_volatile ? cons_volatile : cons_none);
1916         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1917         set_store(store_mem);
1918
1919         if (!need_return)
1920                 return NULL;
1921
1922         ir_node *res_shr;
1923         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1924         if (mode_is_signed(mode)) {
1925                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1926         } else {
1927                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1928         }
1929         return res_shr;
1930 }
1931
1932 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1933                                          ir_node *addr)
1934 {
1935         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
1936         entity_t *entity    = expression->compound_entry;
1937         type_t   *base_type = entity->declaration.type;
1938         ir_mode  *mode      = get_ir_mode_storage(base_type);
1939         ir_node  *mem       = get_store();
1940         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1941         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1942         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1943         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1944
1945         ir_mode  *amode     = mode;
1946         /* optimisation, since shifting in modes < machine_size is usually
1947          * less efficient */
1948         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1949                 amode = mode_uint;
1950         }
1951         unsigned amode_size = get_mode_size_bits(amode);
1952         load_res = create_conv(dbgi, load_res, amode);
1953
1954         set_store(load_mem);
1955
1956         /* kill upper bits */
1957         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1958         unsigned   bitoffset   = entity->compound_member.bit_offset;
1959         unsigned   bitsize     = entity->compound_member.bit_size;
1960         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1961         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1962         ir_node   *countl      = new_d_Const(dbgi, tvl);
1963         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1964
1965         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1966         assert(shift_bitsr <= amode_size);
1967         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1968         ir_node   *countr      = new_d_Const(dbgi, tvr);
1969         ir_node   *shiftr;
1970         if (mode_is_signed(mode)) {
1971                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1972         } else {
1973                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1974         }
1975
1976         type_t  *type    = expression->base.type;
1977         ir_mode *resmode = get_ir_mode_arithmetic(type);
1978         return create_conv(dbgi, shiftr, resmode);
1979 }
1980
1981 /* make sure the selected compound type is constructed */
1982 static void construct_select_compound(const select_expression_t *expression)
1983 {
1984         type_t *type = skip_typeref(expression->compound->base.type);
1985         if (is_type_pointer(type)) {
1986                 type = type->pointer.points_to;
1987         }
1988         (void) get_ir_type(type);
1989 }
1990
1991 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1992                                               ir_node *value, ir_node *addr)
1993 {
1994         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1995         type_t   *type = skip_typeref(expression->base.type);
1996
1997         if (!is_type_compound(type)) {
1998                 ir_mode  *mode = get_ir_mode_storage(type);
1999                 value          = create_conv(dbgi, value, mode);
2000         }
2001
2002         if (expression->kind == EXPR_REFERENCE) {
2003                 const reference_expression_t *ref = &expression->reference;
2004
2005                 entity_t *entity = ref->entity;
2006                 assert(is_declaration(entity));
2007                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2008                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2009                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2010                         set_value(entity->variable.v.value_number, value);
2011                         return value;
2012                 }
2013         }
2014
2015         if (addr == NULL)
2016                 addr = expression_to_addr(expression);
2017         assert(addr != NULL);
2018
2019         if (expression->kind == EXPR_SELECT) {
2020                 const select_expression_t *select = &expression->select;
2021
2022                 construct_select_compound(select);
2023
2024                 entity_t *entity = select->compound_entry;
2025                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2026                 if (entity->compound_member.bitfield) {
2027                         ir_entity *irentity = entity->compound_member.entity;
2028                         bool       set_volatile
2029                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2030                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2031                                                        set_volatile, true);
2032                         return value;
2033                 }
2034         }
2035
2036         assign_value(dbgi, addr, type, value);
2037         return value;
2038 }
2039
2040 static void set_value_for_expression(const expression_t *expression,
2041                                      ir_node *value)
2042 {
2043         set_value_for_expression_addr(expression, value, NULL);
2044 }
2045
2046 static ir_node *get_value_from_lvalue(const expression_t *expression,
2047                                       ir_node *addr)
2048 {
2049         if (expression->kind == EXPR_REFERENCE) {
2050                 const reference_expression_t *ref = &expression->reference;
2051
2052                 entity_t *entity = ref->entity;
2053                 assert(entity->kind == ENTITY_VARIABLE
2054                                 || entity->kind == ENTITY_PARAMETER);
2055                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2056                 int value_number;
2057                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2058                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2059                         value_number = entity->variable.v.value_number;
2060                         assert(addr == NULL);
2061                         type_t  *type = skip_typeref(expression->base.type);
2062                         ir_mode *mode = get_ir_mode_storage(type);
2063                         ir_node *res  = get_value(value_number, mode);
2064                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2065                 }
2066         }
2067
2068         assert(addr != NULL);
2069         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2070
2071         ir_node *value;
2072         if (expression->kind == EXPR_SELECT &&
2073             expression->select.compound_entry->compound_member.bitfield) {
2074             construct_select_compound(&expression->select);
2075                 value = bitfield_extract_to_firm(&expression->select, addr);
2076         } else {
2077                 value = deref_address(dbgi, expression->base.type, addr);
2078         }
2079
2080         return value;
2081 }
2082
2083
2084 static ir_node *create_incdec(const unary_expression_t *expression)
2085 {
2086         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2087         const expression_t *value_expr = expression->value;
2088         ir_node            *addr       = expression_to_addr(value_expr);
2089         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2090
2091         type_t  *type = skip_typeref(expression->base.type);
2092         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2093
2094         ir_node *offset;
2095         if (is_type_pointer(type)) {
2096                 pointer_type_t *pointer_type = &type->pointer;
2097                 offset = get_type_size_node(pointer_type->points_to);
2098         } else {
2099                 assert(is_type_arithmetic(type));
2100                 offset = new_Const(get_mode_one(mode));
2101         }
2102
2103         ir_node *result;
2104         ir_node *store_value;
2105         switch(expression->base.kind) {
2106         case EXPR_UNARY_POSTFIX_INCREMENT:
2107                 result      = value;
2108                 store_value = new_d_Add(dbgi, value, offset, mode);
2109                 break;
2110         case EXPR_UNARY_POSTFIX_DECREMENT:
2111                 result      = value;
2112                 store_value = new_d_Sub(dbgi, value, offset, mode);
2113                 break;
2114         case EXPR_UNARY_PREFIX_INCREMENT:
2115                 result      = new_d_Add(dbgi, value, offset, mode);
2116                 store_value = result;
2117                 break;
2118         case EXPR_UNARY_PREFIX_DECREMENT:
2119                 result      = new_d_Sub(dbgi, value, offset, mode);
2120                 store_value = result;
2121                 break;
2122         default:
2123                 panic("no incdec expr");
2124         }
2125
2126         set_value_for_expression_addr(value_expr, store_value, addr);
2127
2128         return result;
2129 }
2130
2131 static bool is_local_variable(expression_t *expression)
2132 {
2133         if (expression->kind != EXPR_REFERENCE)
2134                 return false;
2135         reference_expression_t *ref_expr = &expression->reference;
2136         entity_t               *entity   = ref_expr->entity;
2137         if (entity->kind != ENTITY_VARIABLE)
2138                 return false;
2139         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2140         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2141 }
2142
2143 static ir_relation get_relation(const expression_kind_t kind)
2144 {
2145         switch(kind) {
2146         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2147         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2148         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2149         case EXPR_BINARY_ISLESS:
2150         case EXPR_BINARY_LESS:          return ir_relation_less;
2151         case EXPR_BINARY_ISLESSEQUAL:
2152         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2153         case EXPR_BINARY_ISGREATER:
2154         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2155         case EXPR_BINARY_ISGREATEREQUAL:
2156         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2157         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2158
2159         default:
2160                 break;
2161         }
2162         panic("trying to get ir_relation from non-comparison binexpr type");
2163 }
2164
2165 /**
2166  * Handle the assume optimizer hint: check if a Confirm
2167  * node can be created.
2168  *
2169  * @param dbi    debug info
2170  * @param expr   the IL assume expression
2171  *
2172  * we support here only some simple cases:
2173  *  - var rel const
2174  *  - const rel val
2175  *  - var rel var
2176  */
2177 static ir_node *handle_assume_compare(dbg_info *dbi,
2178                                       const binary_expression_t *expression)
2179 {
2180         expression_t *op1 = expression->left;
2181         expression_t *op2 = expression->right;
2182         entity_t     *var2, *var = NULL;
2183         ir_node      *res      = NULL;
2184         ir_relation   relation = get_relation(expression->base.kind);
2185
2186         if (is_local_variable(op1) && is_local_variable(op2)) {
2187                 var  = op1->reference.entity;
2188             var2 = op2->reference.entity;
2189
2190                 type_t  *const type = skip_typeref(var->declaration.type);
2191                 ir_mode *const mode = get_ir_mode_storage(type);
2192
2193                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2194                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2195
2196                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2197                 set_value(var2->variable.v.value_number, res);
2198
2199                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2200                 set_value(var->variable.v.value_number, res);
2201
2202                 return res;
2203         }
2204
2205         expression_t *con = NULL;
2206         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2207                 var = op1->reference.entity;
2208                 con = op2;
2209         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2210                 relation = get_inversed_relation(relation);
2211                 var = op2->reference.entity;
2212                 con = op1;
2213         }
2214
2215         if (var != NULL) {
2216                 type_t  *const type = skip_typeref(var->declaration.type);
2217                 ir_mode *const mode = get_ir_mode_storage(type);
2218
2219                 res = get_value(var->variable.v.value_number, mode);
2220                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2221                 set_value(var->variable.v.value_number, res);
2222         }
2223         return res;
2224 }
2225
2226 /**
2227  * Handle the assume optimizer hint.
2228  *
2229  * @param dbi    debug info
2230  * @param expr   the IL assume expression
2231  */
2232 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2233 {
2234         switch(expression->kind) {
2235         case EXPR_BINARY_EQUAL:
2236         case EXPR_BINARY_NOTEQUAL:
2237         case EXPR_BINARY_LESS:
2238         case EXPR_BINARY_LESSEQUAL:
2239         case EXPR_BINARY_GREATER:
2240         case EXPR_BINARY_GREATEREQUAL:
2241                 return handle_assume_compare(dbi, &expression->binary);
2242         default:
2243                 return NULL;
2244         }
2245 }
2246
2247 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2248                             type_t *from_type, type_t *type)
2249 {
2250         type = skip_typeref(type);
2251         if (is_type_void(type)) {
2252                 /* make sure firm type is constructed */
2253                 (void) get_ir_type(type);
2254                 return NULL;
2255         }
2256         if (!is_type_scalar(type)) {
2257                 /* make sure firm type is constructed */
2258                 (void) get_ir_type(type);
2259                 return value_node;
2260         }
2261
2262         from_type     = skip_typeref(from_type);
2263         ir_mode *mode = get_ir_mode_storage(type);
2264         /* check for conversion from / to __based types */
2265         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2266                 const variable_t *from_var = from_type->pointer.base_variable;
2267                 const variable_t *to_var   = type->pointer.base_variable;
2268                 if (from_var != to_var) {
2269                         if (from_var != NULL) {
2270                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2271                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2272                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2273                         }
2274                         if (to_var != NULL) {
2275                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2276                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2277                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2278                         }
2279                 }
2280         }
2281
2282         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2283                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2284                  * convert to mode_b so we only get a 0/1 value */
2285                 value_node = create_conv(dbgi, value_node, mode_b);
2286         }
2287
2288         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2289         ir_node *node       = create_conv(dbgi, value_node, mode);
2290         node                = create_conv(dbgi, node, mode_arith);
2291
2292         return node;
2293 }
2294
2295 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2296 {
2297         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2298         type_t   *type = skip_typeref(expression->base.type);
2299
2300         const expression_t *value = expression->value;
2301
2302         switch(expression->base.kind) {
2303         case EXPR_UNARY_TAKE_ADDRESS:
2304                 return expression_to_addr(value);
2305
2306         case EXPR_UNARY_NEGATE: {
2307                 ir_node *value_node = expression_to_firm(value);
2308                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2309                 return new_d_Minus(dbgi, value_node, mode);
2310         }
2311         case EXPR_UNARY_PLUS:
2312                 return expression_to_firm(value);
2313         case EXPR_UNARY_BITWISE_NEGATE: {
2314                 ir_node *value_node = expression_to_firm(value);
2315                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2316                 return new_d_Not(dbgi, value_node, mode);
2317         }
2318         case EXPR_UNARY_NOT: {
2319                 ir_node *value_node = _expression_to_firm(value);
2320                 value_node          = create_conv(dbgi, value_node, mode_b);
2321                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2322                 return res;
2323         }
2324         case EXPR_UNARY_DEREFERENCE: {
2325                 ir_node *value_node = expression_to_firm(value);
2326                 type_t  *value_type = skip_typeref(value->base.type);
2327                 assert(is_type_pointer(value_type));
2328
2329                 /* check for __based */
2330                 const variable_t *const base_var = value_type->pointer.base_variable;
2331                 if (base_var != NULL) {
2332                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2333                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2334                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2335                 }
2336                 type_t  *points_to  = value_type->pointer.points_to;
2337                 return deref_address(dbgi, points_to, value_node);
2338         }
2339         case EXPR_UNARY_POSTFIX_INCREMENT:
2340         case EXPR_UNARY_POSTFIX_DECREMENT:
2341         case EXPR_UNARY_PREFIX_INCREMENT:
2342         case EXPR_UNARY_PREFIX_DECREMENT:
2343                 return create_incdec(expression);
2344         case EXPR_UNARY_CAST: {
2345                 ir_node *value_node = expression_to_firm(value);
2346                 type_t  *from_type  = value->base.type;
2347                 return create_cast(dbgi, value_node, from_type, type);
2348         }
2349         case EXPR_UNARY_ASSUME:
2350                 return handle_assume(dbgi, value);
2351
2352         default:
2353                 break;
2354         }
2355         panic("invalid unary expression type");
2356 }
2357
2358 /**
2359  * produces a 0/1 depending of the value of a mode_b node
2360  */
2361 static ir_node *produce_condition_result(const expression_t *expression,
2362                                          ir_mode *mode, dbg_info *dbgi)
2363 {
2364         jump_target true_target;
2365         jump_target false_target;
2366         init_jump_target(&true_target,  NULL);
2367         init_jump_target(&false_target, NULL);
2368         create_condition_evaluation(expression, &true_target, &false_target);
2369
2370         ir_node    *val = NULL;
2371         jump_target exit_target;
2372         init_jump_target(&exit_target, NULL);
2373
2374         if (enter_jump_target(&true_target)) {
2375                 val = new_Const(get_mode_one(mode));
2376                 jump_to_target(&exit_target);
2377         }
2378
2379         if (enter_jump_target(&false_target)) {
2380                 ir_node *const zero = new_Const(get_mode_null(mode));
2381                 jump_to_target(&exit_target);
2382                 if (val) {
2383                         ir_node *const in[] = { val, zero };
2384                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2385                 } else {
2386                         val = zero;
2387                 }
2388         }
2389
2390         if (!enter_jump_target(&exit_target)) {
2391                 set_cur_block(new_Block(0, NULL));
2392                 val = new_Unknown(mode);
2393         }
2394         return val;
2395 }
2396
2397 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2398                 ir_node *value, type_t *type)
2399 {
2400         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2401         assert(is_type_pointer(type));
2402         pointer_type_t *const pointer_type = &type->pointer;
2403         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2404         ir_node        *      elem_size    = get_type_size_node(points_to);
2405         elem_size                          = create_conv(dbgi, elem_size, mode);
2406         value                              = create_conv(dbgi, value,     mode);
2407         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2408         return mul;
2409 }
2410
2411 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2412                           ir_node *left, ir_node *right)
2413 {
2414         ir_mode  *mode;
2415         type_t   *type_left  = skip_typeref(expression->left->base.type);
2416         type_t   *type_right = skip_typeref(expression->right->base.type);
2417
2418         expression_kind_t kind = expression->base.kind;
2419
2420         switch (kind) {
2421         case EXPR_BINARY_SHIFTLEFT:
2422         case EXPR_BINARY_SHIFTRIGHT:
2423         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2424         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2425                 mode  = get_ir_mode_arithmetic(expression->base.type);
2426                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2427                 break;
2428
2429         case EXPR_BINARY_SUB:
2430                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2431                         const pointer_type_t *const ptr_type = &type_left->pointer;
2432
2433                         mode = get_ir_mode_arithmetic(expression->base.type);
2434                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2435                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2436                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2437                         ir_node *const no_mem    = new_NoMem();
2438                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2439                                                                                                    mode, op_pin_state_floats);
2440                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2441                 }
2442                 /* fallthrough */
2443         case EXPR_BINARY_SUB_ASSIGN:
2444                 if (is_type_pointer(type_left)) {
2445                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2446                         mode  = get_ir_mode_arithmetic(type_left);
2447                         break;
2448                 }
2449                 goto normal_node;
2450
2451         case EXPR_BINARY_ADD:
2452         case EXPR_BINARY_ADD_ASSIGN:
2453                 if (is_type_pointer(type_left)) {
2454                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2455                         mode  = get_ir_mode_arithmetic(type_left);
2456                         break;
2457                 } else if (is_type_pointer(type_right)) {
2458                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2459                         mode  = get_ir_mode_arithmetic(type_right);
2460                         break;
2461                 }
2462                 goto normal_node;
2463
2464         default:
2465 normal_node:
2466                 mode = get_ir_mode_arithmetic(type_right);
2467                 left = create_conv(dbgi, left, mode);
2468                 break;
2469         }
2470
2471         switch (kind) {
2472         case EXPR_BINARY_ADD_ASSIGN:
2473         case EXPR_BINARY_ADD:
2474                 return new_d_Add(dbgi, left, right, mode);
2475         case EXPR_BINARY_SUB_ASSIGN:
2476         case EXPR_BINARY_SUB:
2477                 return new_d_Sub(dbgi, left, right, mode);
2478         case EXPR_BINARY_MUL_ASSIGN:
2479         case EXPR_BINARY_MUL:
2480                 return new_d_Mul(dbgi, left, right, mode);
2481         case EXPR_BINARY_BITWISE_AND:
2482         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2483                 return new_d_And(dbgi, left, right, mode);
2484         case EXPR_BINARY_BITWISE_OR:
2485         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2486                 return new_d_Or(dbgi, left, right, mode);
2487         case EXPR_BINARY_BITWISE_XOR:
2488         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2489                 return new_d_Eor(dbgi, left, right, mode);
2490         case EXPR_BINARY_SHIFTLEFT:
2491         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2492                 return new_d_Shl(dbgi, left, right, mode);
2493         case EXPR_BINARY_SHIFTRIGHT:
2494         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2495                 if (mode_is_signed(mode)) {
2496                         return new_d_Shrs(dbgi, left, right, mode);
2497                 } else {
2498                         return new_d_Shr(dbgi, left, right, mode);
2499                 }
2500         case EXPR_BINARY_DIV:
2501         case EXPR_BINARY_DIV_ASSIGN: {
2502                 ir_node *pin = new_Pin(new_NoMem());
2503                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2504                                          op_pin_state_floats);
2505                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2506                 return res;
2507         }
2508         case EXPR_BINARY_MOD:
2509         case EXPR_BINARY_MOD_ASSIGN: {
2510                 ir_node *pin = new_Pin(new_NoMem());
2511                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2512                                          op_pin_state_floats);
2513                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2514                 return res;
2515         }
2516         default:
2517                 panic("unexpected expression kind");
2518         }
2519 }
2520
2521 static ir_node *create_lazy_op(const binary_expression_t *expression)
2522 {
2523         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2524         type_t   *type = skip_typeref(expression->base.type);
2525         ir_mode  *mode = get_ir_mode_arithmetic(type);
2526
2527         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2528                 bool val = fold_constant_to_bool(expression->left);
2529                 expression_kind_t ekind = expression->base.kind;
2530                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2531                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2532                         if (!val) {
2533                                 return new_Const(get_mode_null(mode));
2534                         }
2535                 } else {
2536                         if (val) {
2537                                 return new_Const(get_mode_one(mode));
2538                         }
2539                 }
2540
2541                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2542                         bool valr = fold_constant_to_bool(expression->right);
2543                         return create_Const_from_bool(mode, valr);
2544                 }
2545
2546                 return produce_condition_result(expression->right, mode, dbgi);
2547         }
2548
2549         return produce_condition_result((const expression_t*) expression, mode,
2550                                         dbgi);
2551 }
2552
2553 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2554                                             ir_node *right, ir_mode *mode);
2555
2556 static ir_node *create_assign_binop(const binary_expression_t *expression)
2557 {
2558         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2559         const expression_t *left_expr = expression->left;
2560         type_t             *type      = skip_typeref(left_expr->base.type);
2561         ir_node            *right     = expression_to_firm(expression->right);
2562         ir_node            *left_addr = expression_to_addr(left_expr);
2563         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2564         ir_node            *result    = create_op(dbgi, expression, left, right);
2565
2566         result = create_cast(dbgi, result, expression->right->base.type, type);
2567
2568         result = set_value_for_expression_addr(left_expr, result, left_addr);
2569
2570         if (!is_type_compound(type)) {
2571                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2572                 result = create_conv(dbgi, result, mode_arithmetic);
2573         }
2574         return result;
2575 }
2576
2577 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2578 {
2579         expression_kind_t kind = expression->base.kind;
2580
2581         switch(kind) {
2582         case EXPR_BINARY_EQUAL:
2583         case EXPR_BINARY_NOTEQUAL:
2584         case EXPR_BINARY_LESS:
2585         case EXPR_BINARY_LESSEQUAL:
2586         case EXPR_BINARY_GREATER:
2587         case EXPR_BINARY_GREATEREQUAL:
2588         case EXPR_BINARY_ISGREATER:
2589         case EXPR_BINARY_ISGREATEREQUAL:
2590         case EXPR_BINARY_ISLESS:
2591         case EXPR_BINARY_ISLESSEQUAL:
2592         case EXPR_BINARY_ISLESSGREATER:
2593         case EXPR_BINARY_ISUNORDERED: {
2594                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2595                 ir_node    *left     = expression_to_firm(expression->left);
2596                 ir_node    *right    = expression_to_firm(expression->right);
2597                 ir_relation relation = get_relation(kind);
2598                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2599                 return cmp;
2600         }
2601         case EXPR_BINARY_ASSIGN: {
2602                 ir_node *addr  = expression_to_addr(expression->left);
2603                 ir_node *right = expression_to_firm(expression->right);
2604                 ir_node *res
2605                         = set_value_for_expression_addr(expression->left, right, addr);
2606
2607                 type_t  *type            = skip_typeref(expression->base.type);
2608                 if (!is_type_compound(type)) {
2609                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2610                         res                      = create_conv(NULL, res, mode_arithmetic);
2611                 }
2612                 return res;
2613         }
2614         case EXPR_BINARY_ADD:
2615         case EXPR_BINARY_SUB:
2616         case EXPR_BINARY_MUL:
2617         case EXPR_BINARY_DIV:
2618         case EXPR_BINARY_MOD:
2619         case EXPR_BINARY_BITWISE_AND:
2620         case EXPR_BINARY_BITWISE_OR:
2621         case EXPR_BINARY_BITWISE_XOR:
2622         case EXPR_BINARY_SHIFTLEFT:
2623         case EXPR_BINARY_SHIFTRIGHT:
2624         {
2625                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2626                 ir_node  *left  = expression_to_firm(expression->left);
2627                 ir_node  *right = expression_to_firm(expression->right);
2628                 return create_op(dbgi, expression, left, right);
2629         }
2630         case EXPR_BINARY_LOGICAL_AND:
2631         case EXPR_BINARY_LOGICAL_OR:
2632                 return create_lazy_op(expression);
2633         case EXPR_BINARY_COMMA:
2634                 /* create side effects of left side */
2635                 (void) expression_to_firm(expression->left);
2636                 return _expression_to_firm(expression->right);
2637
2638         case EXPR_BINARY_ADD_ASSIGN:
2639         case EXPR_BINARY_SUB_ASSIGN:
2640         case EXPR_BINARY_MUL_ASSIGN:
2641         case EXPR_BINARY_MOD_ASSIGN:
2642         case EXPR_BINARY_DIV_ASSIGN:
2643         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2644         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2645         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2646         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2647         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2648                 return create_assign_binop(expression);
2649         default:
2650                 panic("invalid binexpr type");
2651         }
2652 }
2653
2654 static ir_node *array_access_addr(const array_access_expression_t *expression)
2655 {
2656         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2657         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2658         ir_node  *offset      = expression_to_firm(expression->index);
2659         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2660         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2661         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2662
2663         return result;
2664 }
2665
2666 static ir_node *array_access_to_firm(
2667                 const array_access_expression_t *expression)
2668 {
2669         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2670         ir_node  *addr   = array_access_addr(expression);
2671         type_t   *type   = revert_automatic_type_conversion(
2672                         (const expression_t*) expression);
2673         type             = skip_typeref(type);
2674
2675         return deref_address(dbgi, type, addr);
2676 }
2677
2678 static long get_offsetof_offset(const offsetof_expression_t *expression)
2679 {
2680         type_t *orig_type = expression->type;
2681         long    offset    = 0;
2682
2683         designator_t *designator = expression->designator;
2684         for ( ; designator != NULL; designator = designator->next) {
2685                 type_t *type = skip_typeref(orig_type);
2686                 /* be sure the type is constructed */
2687                 (void) get_ir_type(type);
2688
2689                 if (designator->symbol != NULL) {
2690                         assert(is_type_compound(type));
2691                         symbol_t *symbol = designator->symbol;
2692
2693                         compound_t *compound = type->compound.compound;
2694                         entity_t   *iter     = compound->members.entities;
2695                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2696
2697                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2698                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2699                         offset += get_entity_offset(iter->compound_member.entity);
2700
2701                         orig_type = iter->declaration.type;
2702                 } else {
2703                         expression_t *array_index = designator->array_index;
2704                         assert(designator->array_index != NULL);
2705                         assert(is_type_array(type));
2706
2707                         long index         = fold_constant_to_int(array_index);
2708                         ir_type *arr_type  = get_ir_type(type);
2709                         ir_type *elem_type = get_array_element_type(arr_type);
2710                         long     elem_size = get_type_size_bytes(elem_type);
2711
2712                         offset += index * elem_size;
2713
2714                         orig_type = type->array.element_type;
2715                 }
2716         }
2717
2718         return offset;
2719 }
2720
2721 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2722 {
2723         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2724         long       offset = get_offsetof_offset(expression);
2725         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2726         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2727
2728         return new_d_Const(dbgi, tv);
2729 }
2730
2731 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2732                                      ir_entity *entity, type_t *type);
2733 static ir_initializer_t *create_ir_initializer(
2734                 const initializer_t *initializer, type_t *type);
2735
2736 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2737                                             initializer_t *initializer,
2738                                             type_t *type)
2739 {
2740         /* create the ir_initializer */
2741         PUSH_IRG(get_const_code_irg());
2742         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2743         POP_IRG();
2744
2745         ident     *const id          = id_unique("initializer.%u");
2746         ir_type   *const irtype      = get_ir_type(type);
2747         ir_type   *const global_type = get_glob_type();
2748         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2749         set_entity_ld_ident(entity, id);
2750         set_entity_visibility(entity, ir_visibility_private);
2751         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2752         set_entity_initializer(entity, irinitializer);
2753         return entity;
2754 }
2755
2756 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2757 {
2758         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2759         type_t        *type        = expression->type;
2760         initializer_t *initializer = expression->initializer;
2761
2762         if (expression->global_scope ||
2763                 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2764             && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2765                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2766                 return create_symconst(dbgi, entity);
2767         } else {
2768                 /* create an entity on the stack */
2769                 ident   *const id     = id_unique("CompLit.%u");
2770                 ir_type *const irtype = get_ir_type(type);
2771                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2772
2773                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2774                 set_entity_ld_ident(entity, id);
2775
2776                 /* create initialisation code */
2777                 create_local_initializer(initializer, dbgi, entity, type);
2778
2779                 /* create a sel for the compound literal address */
2780                 ir_node *frame = get_irg_frame(current_ir_graph);
2781                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2782                 return sel;
2783         }
2784 }
2785
2786 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2787 {
2788         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2789         type_t   *const type = expr->type;
2790         ir_node  *const addr = compound_literal_addr(expr);
2791         return deref_address(dbgi, type, addr);
2792 }
2793
2794 /**
2795  * Transform a sizeof expression into Firm code.
2796  */
2797 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2798 {
2799         type_t *const type = skip_typeref(expression->type);
2800         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2801         if (is_type_array(type) && type->array.is_vla
2802                         && expression->tp_expression != NULL) {
2803                 expression_to_firm(expression->tp_expression);
2804         }
2805
2806         return get_type_size_node(type);
2807 }
2808
2809 static entity_t *get_expression_entity(const expression_t *expression)
2810 {
2811         if (expression->kind != EXPR_REFERENCE)
2812                 return NULL;
2813
2814         return expression->reference.entity;
2815 }
2816
2817 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2818 {
2819         switch(entity->kind) {
2820         case DECLARATION_KIND_CASES:
2821                 return entity->declaration.alignment;
2822         case ENTITY_STRUCT:
2823         case ENTITY_UNION:
2824                 return entity->compound.alignment;
2825         case ENTITY_TYPEDEF:
2826                 return entity->typedefe.alignment;
2827         default:
2828                 break;
2829         }
2830         return 0;
2831 }
2832
2833 /**
2834  * Transform an alignof expression into Firm code.
2835  */
2836 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2837 {
2838         unsigned alignment = 0;
2839
2840         const expression_t *tp_expression = expression->tp_expression;
2841         if (tp_expression != NULL) {
2842                 entity_t *entity = get_expression_entity(tp_expression);
2843                 if (entity != NULL) {
2844                         alignment = get_cparser_entity_alignment(entity);
2845                 }
2846         }
2847
2848         if (alignment == 0) {
2849                 type_t *type = expression->type;
2850                 alignment = get_type_alignment(type);
2851         }
2852
2853         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2854         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2855         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2856         return new_d_Const(dbgi, tv);
2857 }
2858
2859 static void init_ir_types(void);
2860
2861 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2862 {
2863         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2864
2865         bool constant_folding_old = constant_folding;
2866         constant_folding = true;
2867         int old_optimize         = get_optimize();
2868         int old_constant_folding = get_opt_constant_folding();
2869         set_optimize(1);
2870         set_opt_constant_folding(1);
2871
2872         init_ir_types();
2873
2874         PUSH_IRG(get_const_code_irg());
2875         ir_node *const cnst = _expression_to_firm(expression);
2876         POP_IRG();
2877
2878         set_optimize(old_optimize);
2879         set_opt_constant_folding(old_constant_folding);
2880
2881         if (!is_Const(cnst)) {
2882                 panic("couldn't fold constant");
2883         }
2884
2885         constant_folding = constant_folding_old;
2886
2887         ir_tarval *const tv   = get_Const_tarval(cnst);
2888         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2889         return tarval_convert_to(tv, mode);
2890 }
2891
2892 /* this function is only used in parser.c, but it relies on libfirm functionality */
2893 bool constant_is_negative(const expression_t *expression)
2894 {
2895         ir_tarval *tv = fold_constant_to_tarval(expression);
2896         return tarval_is_negative(tv);
2897 }
2898
2899 long fold_constant_to_int(const expression_t *expression)
2900 {
2901         ir_tarval *tv = fold_constant_to_tarval(expression);
2902         if (!tarval_is_long(tv)) {
2903                 panic("result of constant folding is not integer");
2904         }
2905
2906         return get_tarval_long(tv);
2907 }
2908
2909 bool fold_constant_to_bool(const expression_t *expression)
2910 {
2911         ir_tarval *tv = fold_constant_to_tarval(expression);
2912         return !tarval_is_null(tv);
2913 }
2914
2915 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2916 {
2917         /* first try to fold a constant condition */
2918         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2919                 bool val = fold_constant_to_bool(expression->condition);
2920                 if (val) {
2921                         expression_t *true_expression = expression->true_expression;
2922                         if (true_expression == NULL)
2923                                 true_expression = expression->condition;
2924                         return expression_to_firm(true_expression);
2925                 } else {
2926                         return expression_to_firm(expression->false_expression);
2927                 }
2928         }
2929
2930         jump_target true_target;
2931         jump_target false_target;
2932         init_jump_target(&true_target,  NULL);
2933         init_jump_target(&false_target, NULL);
2934         ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2935
2936         ir_node    *val = NULL;
2937         jump_target exit_target;
2938         init_jump_target(&exit_target, NULL);
2939
2940         if (enter_jump_target(&true_target)) {
2941                 if (expression->true_expression) {
2942                         val = expression_to_firm(expression->true_expression);
2943                 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2944                         val = cond_expr;
2945                 } else {
2946                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2947                          * comparison.  Generate a "1" as value for the true branch. */
2948                         val = new_Const(get_mode_one(mode_Is));
2949                 }
2950                 jump_to_target(&exit_target);
2951         }
2952
2953         if (enter_jump_target(&false_target)) {
2954                 ir_node *const false_val = expression_to_firm(expression->false_expression);
2955                 jump_to_target(&exit_target);
2956                 if (val) {
2957                         ir_node  *const in[] = { val, false_val };
2958                         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2959                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2960                 } else {
2961                         val = false_val;
2962                 }
2963         }
2964
2965         if (!enter_jump_target(&exit_target)) {
2966                 set_cur_block(new_Block(0, NULL));
2967                 type_t *const type = skip_typeref(expression->base.type);
2968                 if (!is_type_void(type))
2969                         val = new_Unknown(get_ir_mode_arithmetic(type));
2970         }
2971         return val;
2972 }
2973
2974 /**
2975  * Returns an IR-node representing the address of a field.
2976  */
2977 static ir_node *select_addr(const select_expression_t *expression)
2978 {
2979         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2980
2981         construct_select_compound(expression);
2982
2983         ir_node *compound_addr = expression_to_firm(expression->compound);
2984
2985         entity_t *entry = expression->compound_entry;
2986         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2987         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2988
2989         if (constant_folding) {
2990                 ir_mode *mode      = get_irn_mode(compound_addr);
2991                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2992                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2993                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2994         } else {
2995                 ir_entity *irentity = entry->compound_member.entity;
2996                 assert(irentity != NULL);
2997                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2998         }
2999 }
3000
3001 static ir_node *select_to_firm(const select_expression_t *expression)
3002 {
3003         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3004         ir_node  *addr = select_addr(expression);
3005         type_t   *type = revert_automatic_type_conversion(
3006                         (const expression_t*) expression);
3007         type           = skip_typeref(type);
3008
3009         entity_t *entry = expression->compound_entry;
3010         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3011
3012         if (entry->compound_member.bitfield) {
3013                 return bitfield_extract_to_firm(expression, addr);
3014         }
3015
3016         return deref_address(dbgi, type, addr);
3017 }
3018
3019 /* Values returned by __builtin_classify_type. */
3020 typedef enum gcc_type_class
3021 {
3022         no_type_class = -1,
3023         void_type_class,
3024         integer_type_class,
3025         char_type_class,
3026         enumeral_type_class,
3027         boolean_type_class,
3028         pointer_type_class,
3029         reference_type_class,
3030         offset_type_class,
3031         real_type_class,
3032         complex_type_class,
3033         function_type_class,
3034         method_type_class,
3035         record_type_class,
3036         union_type_class,
3037         array_type_class,
3038         string_type_class,
3039         set_type_class,
3040         file_type_class,
3041         lang_type_class
3042 } gcc_type_class;
3043
3044 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3045 {
3046         type_t *type = expr->type_expression->base.type;
3047
3048         /* FIXME gcc returns different values depending on whether compiling C or C++
3049          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3050         gcc_type_class tc;
3051         for (;;) {
3052                 type = skip_typeref(type);
3053                 switch (type->kind) {
3054                         case TYPE_ATOMIC: {
3055                                 const atomic_type_t *const atomic_type = &type->atomic;
3056                                 switch (atomic_type->akind) {
3057                                         /* gcc cannot do that */
3058                                         case ATOMIC_TYPE_VOID:
3059                                                 tc = void_type_class;
3060                                                 goto make_const;
3061
3062                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3063                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3064                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3065                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3066                                         case ATOMIC_TYPE_SHORT:
3067                                         case ATOMIC_TYPE_USHORT:
3068                                         case ATOMIC_TYPE_INT:
3069                                         case ATOMIC_TYPE_UINT:
3070                                         case ATOMIC_TYPE_LONG:
3071                                         case ATOMIC_TYPE_ULONG:
3072                                         case ATOMIC_TYPE_LONGLONG:
3073                                         case ATOMIC_TYPE_ULONGLONG:
3074                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3075                                                 tc = integer_type_class;
3076                                                 goto make_const;
3077
3078                                         case ATOMIC_TYPE_FLOAT:
3079                                         case ATOMIC_TYPE_DOUBLE:
3080                                         case ATOMIC_TYPE_LONG_DOUBLE:
3081                                                 tc = real_type_class;
3082                                                 goto make_const;
3083                                 }
3084                                 panic("Unexpected atomic type.");
3085                         }
3086
3087                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3088                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3089                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3090                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3091                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3092                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3093                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3094
3095                         /* gcc handles this as integer */
3096                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3097
3098                         /* gcc classifies the referenced type */
3099                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3100
3101                         /* typedef/typeof should be skipped already */
3102                         case TYPE_TYPEDEF:
3103                         case TYPE_TYPEOF:
3104                         case TYPE_ERROR:
3105                                 break;
3106                 }
3107                 panic("unexpected type.");
3108         }
3109
3110 make_const:;
3111         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3112         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3113         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3114         return new_d_Const(dbgi, tv);
3115 }
3116
3117 static ir_node *function_name_to_firm(
3118                 const funcname_expression_t *const expr)
3119 {
3120         switch(expr->kind) {
3121         case FUNCNAME_FUNCTION:
3122         case FUNCNAME_PRETTY_FUNCTION:
3123         case FUNCNAME_FUNCDNAME:
3124                 if (current_function_name == NULL) {
3125                         source_position_t const *const src_pos = &expr->base.source_position;
3126                         char              const *const name    = current_function_entity->base.symbol->string;
3127                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3128                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3129                 }
3130                 return current_function_name;
3131         case FUNCNAME_FUNCSIG:
3132                 if (current_funcsig == NULL) {
3133                         source_position_t const *const src_pos = &expr->base.source_position;
3134                         ir_entity               *const ent     = get_irg_entity(current_ir_graph);
3135                         char              const *const name    = get_entity_ld_name(ent);
3136                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3137                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3138                 }
3139                 return current_funcsig;
3140         }
3141         panic("Unsupported function name");
3142 }
3143
3144 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3145 {
3146         statement_t *statement = expr->statement;
3147
3148         assert(statement->kind == STATEMENT_COMPOUND);
3149         return compound_statement_to_firm(&statement->compound);
3150 }
3151
3152 static ir_node *va_start_expression_to_firm(
3153         const va_start_expression_t *const expr)
3154 {
3155         ir_entity *param_ent = current_vararg_entity;
3156         if (param_ent == NULL) {
3157                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3158                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3159                 ir_type *const param_type  = get_unknown_type();
3160                 param_ent = new_parameter_entity(frame_type, n, param_type);
3161                 current_vararg_entity = param_ent;
3162         }
3163
3164         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3165         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3166         ir_node  *const no_mem  = new_NoMem();
3167         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3168
3169         set_value_for_expression(expr->ap, arg_sel);
3170
3171         return NULL;
3172 }
3173
3174 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3175 {
3176         type_t       *const type    = expr->base.type;
3177         expression_t *const ap_expr = expr->ap;
3178         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3179         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3180         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3181         ir_node      *const res     = deref_address(dbgi, type, ap);
3182
3183         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3184         ir_mode      *const mode    = get_irn_mode(cnst);
3185         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3186         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3187         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3188         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3189         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3190
3191         set_value_for_expression_addr(ap_expr, add, ap_addr);
3192
3193         return res;
3194 }
3195
3196 /**
3197  * Generate Firm for a va_copy expression.
3198  */
3199 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3200 {
3201         ir_node *const src = expression_to_firm(expr->src);
3202         set_value_for_expression(expr->dst, src);
3203         return NULL;
3204 }
3205
3206 static ir_node *dereference_addr(const unary_expression_t *const expression)
3207 {
3208         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3209         return expression_to_firm(expression->value);
3210 }
3211
3212 /**
3213  * Returns a IR-node representing an lvalue of the given expression.
3214  */
3215 static ir_node *expression_to_addr(const expression_t *expression)
3216 {
3217         switch(expression->kind) {
3218         case EXPR_ARRAY_ACCESS:
3219                 return array_access_addr(&expression->array_access);
3220         case EXPR_CALL:
3221                 return call_expression_to_firm(&expression->call);
3222         case EXPR_COMPOUND_LITERAL:
3223                 return compound_literal_addr(&expression->compound_literal);
3224         case EXPR_REFERENCE:
3225                 return reference_addr(&expression->reference);
3226         case EXPR_SELECT:
3227                 return select_addr(&expression->select);
3228         case EXPR_UNARY_DEREFERENCE:
3229                 return dereference_addr(&expression->unary);
3230         default:
3231                 break;
3232         }
3233         panic("trying to get address of non-lvalue");
3234 }
3235
3236 static ir_node *builtin_constant_to_firm(
3237                 const builtin_constant_expression_t *expression)
3238 {
3239         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3240         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3241         return create_Const_from_bool(mode, v);
3242 }
3243
3244 static ir_node *builtin_types_compatible_to_firm(
3245                 const builtin_types_compatible_expression_t *expression)
3246 {
3247         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3248         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3249         bool     const value = types_compatible(left, right);
3250         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3251         return create_Const_from_bool(mode, value);
3252 }
3253
3254 static void prepare_label_target(label_t *const label)
3255 {
3256         if (label->address_taken && !label->indirect_block) {
3257                 ir_node *const iblock = new_immBlock();
3258                 label->indirect_block = iblock;
3259                 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3260                 jump_from_block_to_target(&label->target, iblock);
3261         }
3262 }
3263
3264 /**
3265  * Pointer to a label.  This is used for the
3266  * GNU address-of-label extension.
3267  */
3268 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3269 {
3270         /* Beware: Might be called from create initializer with current_ir_graph
3271          * set to const_code_irg. */
3272         PUSH_IRG(current_function);
3273         prepare_label_target(label->label);
3274         POP_IRG();
3275
3276         symconst_symbol value;
3277         value.entity_p = create_Block_entity(label->label->indirect_block);
3278         dbg_info *const dbgi = get_dbg_info(&label->base.source_position);
3279         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3280 }
3281
3282 /**
3283  * creates firm nodes for an expression. The difference between this function
3284  * and expression_to_firm is, that this version might produce mode_b nodes
3285  * instead of mode_Is.
3286  */
3287 static ir_node *_expression_to_firm(expression_t const *const expr)
3288 {
3289 #ifndef NDEBUG
3290         if (!constant_folding) {
3291                 assert(!expr->base.transformed);
3292                 ((expression_t*)expr)->base.transformed = true;
3293         }
3294 #endif
3295
3296         switch (expr->kind) {
3297         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3298         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3299         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3300         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3301         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3302         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3303         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3304         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3305         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3306         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3307         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3308         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3309         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3310         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3311         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3312         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3313         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3314         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3315         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3316         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3317         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3318         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3319         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3320
3321         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3322
3323         case EXPR_ERROR: break;
3324         }
3325         panic("invalid expression");
3326 }
3327
3328 /**
3329  * Check if a given expression is a GNU __builtin_expect() call.
3330  */
3331 static bool is_builtin_expect(const expression_t *expression)
3332 {
3333         if (expression->kind != EXPR_CALL)
3334                 return false;
3335
3336         expression_t *function = expression->call.function;
3337         if (function->kind != EXPR_REFERENCE)
3338                 return false;
3339         reference_expression_t *ref = &function->reference;
3340         if (ref->entity->kind         != ENTITY_FUNCTION ||
3341             ref->entity->function.btk != BUILTIN_EXPECT)
3342                 return false;
3343
3344         return true;
3345 }
3346
3347 static bool produces_mode_b(const expression_t *expression)
3348 {
3349         switch (expression->kind) {
3350         case EXPR_BINARY_EQUAL:
3351         case EXPR_BINARY_NOTEQUAL:
3352         case EXPR_BINARY_LESS:
3353         case EXPR_BINARY_LESSEQUAL:
3354         case EXPR_BINARY_GREATER:
3355         case EXPR_BINARY_GREATEREQUAL:
3356         case EXPR_BINARY_ISGREATER:
3357         case EXPR_BINARY_ISGREATEREQUAL:
3358         case EXPR_BINARY_ISLESS:
3359         case EXPR_BINARY_ISLESSEQUAL:
3360         case EXPR_BINARY_ISLESSGREATER:
3361         case EXPR_BINARY_ISUNORDERED:
3362         case EXPR_UNARY_NOT:
3363                 return true;
3364
3365         case EXPR_CALL:
3366                 if (is_builtin_expect(expression)) {
3367                         expression_t *argument = expression->call.arguments->expression;
3368                         return produces_mode_b(argument);
3369                 }
3370                 return false;
3371         case EXPR_BINARY_COMMA:
3372                 return produces_mode_b(expression->binary.right);
3373
3374         default:
3375                 return false;
3376         }
3377 }
3378
3379 static ir_node *expression_to_firm(const expression_t *expression)
3380 {
3381         if (!produces_mode_b(expression)) {
3382                 ir_node *res = _expression_to_firm(expression);
3383                 assert(res == NULL || get_irn_mode(res) != mode_b);
3384                 return res;
3385         }
3386
3387         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3388                 return new_Const(fold_constant_to_tarval(expression));
3389         }
3390
3391         /* we have to produce a 0/1 from the mode_b expression */
3392         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3393         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3394         return produce_condition_result(expression, mode, dbgi);
3395 }
3396
3397 /**
3398  * create a short-circuit expression evaluation that tries to construct
3399  * efficient control flow structures for &&, || and ! expressions
3400  */
3401 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3402 {
3403         switch(expression->kind) {
3404         case EXPR_UNARY_NOT: {
3405                 const unary_expression_t *unary_expression = &expression->unary;
3406                 create_condition_evaluation(unary_expression->value, false_target, true_target);
3407                 return NULL;
3408         }
3409         case EXPR_BINARY_LOGICAL_AND: {
3410                 jump_target extra_target;
3411                 init_jump_target(&extra_target, NULL);
3412                 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3413                 if (enter_jump_target(&extra_target))
3414                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3415                 return NULL;
3416         }
3417         case EXPR_BINARY_LOGICAL_OR: {
3418                 jump_target extra_target;
3419                 init_jump_target(&extra_target, NULL);
3420                 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3421                 if (enter_jump_target(&extra_target))
3422                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3423                 return NULL;
3424         }
3425         default:
3426                 break;
3427         }
3428
3429         ir_node *cond_expr = _expression_to_firm(expression);
3430         if (is_Const(cond_expr)) {
3431                 if (tarval_is_null(get_Const_tarval(cond_expr))) {
3432                         jump_to_target(false_target);
3433                 } else {
3434                         jump_to_target(true_target);
3435                 }
3436         } else {
3437                 dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3438                 ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3439                 ir_node  *cond       = new_d_Cond(dbgi, condition);
3440                 ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3441                 ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3442
3443                 /* set branch prediction info based on __builtin_expect */
3444                 if (is_builtin_expect(expression) && is_Cond(cond)) {
3445                         call_argument_t *argument = expression->call.arguments->next;
3446                         if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3447                                 bool               const cnst = fold_constant_to_bool(argument->expression);
3448                                 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3449                                 set_Cond_jmp_pred(cond, pred);
3450                         }
3451                 }
3452
3453                 add_pred_to_jump_target(true_target,  true_proj);
3454                 add_pred_to_jump_target(false_target, false_proj);
3455         }
3456         set_unreachable_now();
3457         return cond_expr;
3458 }
3459
3460 static void create_variable_entity(entity_t *variable,
3461                                    declaration_kind_t declaration_kind,
3462                                    ir_type *parent_type)
3463 {
3464         assert(variable->kind == ENTITY_VARIABLE);
3465         type_t    *type = skip_typeref(variable->declaration.type);
3466
3467         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3468         ir_type   *const irtype    = get_ir_type(type);
3469         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3470         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3471         unsigned         alignment = variable->declaration.alignment;
3472
3473         set_entity_alignment(irentity, alignment);
3474
3475         handle_decl_modifiers(irentity, variable);
3476
3477         variable->declaration.kind  = (unsigned char) declaration_kind;
3478         variable->variable.v.entity = irentity;
3479         set_entity_ld_ident(irentity, create_ld_ident(variable));
3480
3481         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3482                 set_entity_volatility(irentity, volatility_is_volatile);
3483         }
3484 }
3485
3486
3487 typedef struct type_path_entry_t type_path_entry_t;
3488 struct type_path_entry_t {
3489         type_t           *type;
3490         ir_initializer_t *initializer;
3491         size_t            index;
3492         entity_t         *compound_entry;
3493 };
3494
3495 typedef struct type_path_t type_path_t;
3496 struct type_path_t {
3497         type_path_entry_t *path;
3498         type_t            *top_type;
3499         bool               invalid;
3500 };
3501
3502 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3503 {
3504         size_t len = ARR_LEN(path->path);
3505
3506         for (size_t i = 0; i < len; ++i) {
3507                 const type_path_entry_t *entry = & path->path[i];
3508
3509                 type_t *type = skip_typeref(entry->type);
3510                 if (is_type_compound(type)) {
3511                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3512                 } else if (is_type_array(type)) {
3513                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3514                 } else {
3515                         fprintf(stderr, "-INVALID-");
3516                 }
3517         }
3518         fprintf(stderr, "  (");
3519         print_type(path->top_type);
3520         fprintf(stderr, ")");
3521 }
3522
3523 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3524 {
3525         size_t len = ARR_LEN(path->path);
3526         assert(len > 0);
3527         return & path->path[len-1];
3528 }
3529
3530 static type_path_entry_t *append_to_type_path(type_path_t *path)
3531 {
3532         size_t len = ARR_LEN(path->path);
3533         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3534
3535         type_path_entry_t *result = & path->path[len];
3536         memset(result, 0, sizeof(result[0]));
3537         return result;
3538 }
3539
3540 static size_t get_compound_member_count(const compound_type_t *type)
3541 {
3542         compound_t *compound  = type->compound;
3543         size_t      n_members = 0;
3544         entity_t   *member    = compound->members.entities;
3545         for ( ; member != NULL; member = member->base.next) {
3546                 ++n_members;
3547         }
3548
3549         return n_members;
3550 }
3551
3552 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3553 {
3554         type_t *orig_top_type = path->top_type;
3555         type_t *top_type      = skip_typeref(orig_top_type);
3556
3557         assert(is_type_compound(top_type) || is_type_array(top_type));
3558
3559         if (ARR_LEN(path->path) == 0) {
3560                 return NULL;
3561         } else {
3562                 type_path_entry_t *top         = get_type_path_top(path);
3563                 ir_initializer_t  *initializer = top->initializer;
3564                 return get_initializer_compound_value(initializer, top->index);
3565         }
3566 }
3567
3568 static void descend_into_subtype(type_path_t *path)
3569 {
3570         type_t *orig_top_type = path->top_type;
3571         type_t *top_type      = skip_typeref(orig_top_type);
3572
3573         assert(is_type_compound(top_type) || is_type_array(top_type));
3574
3575         ir_initializer_t *initializer = get_initializer_entry(path);
3576
3577         type_path_entry_t *top = append_to_type_path(path);
3578         top->type              = top_type;
3579
3580         size_t len;
3581
3582         if (is_type_compound(top_type)) {
3583                 compound_t *const compound = top_type->compound.compound;
3584                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3585
3586                 top->compound_entry = entry;
3587                 top->index          = 0;
3588                 len                 = get_compound_member_count(&top_type->compound);
3589                 if (entry != NULL) {
3590                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3591                         path->top_type = entry->declaration.type;
3592                 }
3593         } else {
3594                 assert(is_type_array(top_type));
3595                 assert(top_type->array.size > 0);
3596
3597                 top->index     = 0;
3598                 path->top_type = top_type->array.element_type;
3599                 len            = top_type->array.size;
3600         }
3601         if (initializer == NULL
3602                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3603                 initializer = create_initializer_compound(len);
3604                 /* we have to set the entry at the 2nd latest path entry... */
3605                 size_t path_len = ARR_LEN(path->path);
3606                 assert(path_len >= 1);
3607                 if (path_len > 1) {
3608                         type_path_entry_t *entry        = & path->path[path_len-2];
3609                         ir_initializer_t  *tinitializer = entry->initializer;
3610                         set_initializer_compound_value(tinitializer, entry->index,
3611                                                        initializer);
3612                 }
3613         }
3614         top->initializer = initializer;
3615 }
3616
3617 static void ascend_from_subtype(type_path_t *path)
3618 {
3619         type_path_entry_t *top = get_type_path_top(path);
3620
3621         path->top_type = top->type;
3622
3623         size_t len = ARR_LEN(path->path);
3624         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3625 }
3626
3627 static void walk_designator(type_path_t *path, const designator_t *designator)
3628 {
3629         /* designators start at current object type */
3630         ARR_RESIZE(type_path_entry_t, path->path, 1);
3631
3632         for ( ; designator != NULL; designator = designator->next) {
3633                 type_path_entry_t *top         = get_type_path_top(path);
3634                 type_t            *orig_type   = top->type;
3635                 type_t            *type        = skip_typeref(orig_type);
3636
3637                 if (designator->symbol != NULL) {
3638                         assert(is_type_compound(type));
3639                         size_t    index  = 0;
3640                         symbol_t *symbol = designator->symbol;
3641
3642                         compound_t *compound = type->compound.compound;
3643                         entity_t   *iter     = compound->members.entities;
3644                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3645                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3646
3647                         /* revert previous initialisations of other union elements */
3648                         if (type->kind == TYPE_COMPOUND_UNION) {
3649                                 ir_initializer_t *initializer = top->initializer;
3650                                 if (initializer != NULL
3651                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3652                                         /* are we writing to a new element? */
3653                                         ir_initializer_t *oldi
3654                                                 = get_initializer_compound_value(initializer, index);
3655                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3656                                                 /* clear initializer */
3657                                                 size_t len
3658                                                         = get_initializer_compound_n_entries(initializer);
3659                                                 ir_initializer_t *nulli = get_initializer_null();
3660                                                 for (size_t i = 0; i < len; ++i) {
3661                                                         set_initializer_compound_value(initializer, i,
3662                                                                                        nulli);
3663                                                 }
3664                                         }
3665                                 }
3666                         }
3667
3668                         top->type           = orig_type;
3669                         top->compound_entry = iter;
3670                         top->index          = index;
3671                         orig_type           = iter->declaration.type;
3672                 } else {
3673                         expression_t *array_index = designator->array_index;
3674                         assert(is_type_array(type));
3675
3676                         long index = fold_constant_to_int(array_index);
3677                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3678
3679                         top->type  = orig_type;
3680                         top->index = (size_t) index;
3681                         orig_type  = type->array.element_type;
3682                 }
3683                 path->top_type = orig_type;
3684
3685                 if (designator->next != NULL) {
3686                         descend_into_subtype(path);
3687                 }
3688         }
3689
3690         path->invalid  = false;
3691 }
3692
3693 static void advance_current_object(type_path_t *path)
3694 {
3695         if (path->invalid) {
3696                 /* TODO: handle this... */
3697                 panic("invalid initializer (excessive elements)");
3698         }
3699
3700         type_path_entry_t *top = get_type_path_top(path);
3701
3702         type_t *type = skip_typeref(top->type);
3703         if (is_type_union(type)) {
3704                 /* only the first element is initialized in unions */
3705                 top->compound_entry = NULL;
3706         } else if (is_type_struct(type)) {
3707                 entity_t *entry = top->compound_entry;
3708
3709                 top->index++;
3710                 entry               = skip_unnamed_bitfields(entry->base.next);
3711                 top->compound_entry = entry;
3712                 if (entry != NULL) {
3713                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3714                         path->top_type = entry->declaration.type;
3715                         return;
3716                 }
3717         } else {
3718                 assert(is_type_array(type));
3719
3720                 top->index++;
3721                 if (!type->array.size_constant || top->index < type->array.size) {
3722                         return;
3723                 }
3724         }
3725
3726         /* we're past the last member of the current sub-aggregate, try if we
3727          * can ascend in the type hierarchy and continue with another subobject */
3728         size_t len = ARR_LEN(path->path);
3729
3730         if (len > 1) {
3731                 ascend_from_subtype(path);
3732                 advance_current_object(path);
3733         } else {
3734                 path->invalid = true;
3735         }
3736 }
3737
3738
3739 static ir_initializer_t *create_ir_initializer_value(
3740                 const initializer_value_t *initializer)
3741 {
3742         expression_t *expr = initializer->value;
3743         type_t       *type = skip_typeref(expr->base.type);
3744
3745         if (is_type_compound(type)) {
3746                 if (expr->kind == EXPR_UNARY_CAST) {
3747                         expr = expr->unary.value;
3748                         type = skip_typeref(expr->base.type);
3749                 }
3750                 /* must be a compound literal... */
3751                 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3752                         return create_ir_initializer(expr->compound_literal.initializer,
3753                                                      type);
3754                 }
3755         }
3756
3757         ir_node *value = expression_to_firm(expr);
3758         if (!is_type_compound(type)) {
3759                 ir_mode *mode = get_ir_mode_storage(type);
3760                 value         = create_conv(NULL, value, mode);
3761         }
3762         return create_initializer_const(value);
3763 }
3764
3765 /** test wether type can be initialized by a string constant */
3766 static bool is_string_type(type_t *type)
3767 {
3768         if (!is_type_array(type))
3769                 return false;
3770
3771         type_t *const inner = skip_typeref(type->array.element_type);
3772         return is_type_integer(inner);
3773 }
3774
3775 static ir_initializer_t *create_ir_initializer_list(
3776                 const initializer_list_t *initializer, type_t *type)
3777 {
3778         type_path_t path;
3779         memset(&path, 0, sizeof(path));
3780         path.top_type = type;
3781         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3782
3783         descend_into_subtype(&path);
3784
3785         for (size_t i = 0; i < initializer->len; ++i) {
3786                 const initializer_t *sub_initializer = initializer->initializers[i];
3787
3788                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3789                         walk_designator(&path, sub_initializer->designator.designator);
3790                         continue;
3791                 }
3792
3793                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3794                         const expression_t *expr      = sub_initializer->value.value;
3795                         const type_t       *expr_type = skip_typeref(expr->base.type);
3796                         /* we might have to descend into types until the types match */
3797                         while(true) {
3798                                 type_t *orig_top_type = path.top_type;
3799                                 type_t *top_type      = skip_typeref(orig_top_type);
3800
3801                                 if (types_compatible(top_type, expr_type))
3802                                         break;
3803                                 descend_into_subtype(&path);
3804                         }
3805                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3806                         /* we might have to descend into types until we're at a scalar
3807                          * type */
3808                         while (true) {
3809                                 type_t *orig_top_type = path.top_type;
3810                                 type_t *top_type      = skip_typeref(orig_top_type);
3811
3812                                 if (is_string_type(top_type))
3813                                         break;
3814                                 descend_into_subtype(&path);
3815                         }
3816                 }
3817
3818                 ir_initializer_t *sub_irinitializer
3819                         = create_ir_initializer(sub_initializer, path.top_type);
3820
3821                 size_t path_len = ARR_LEN(path.path);
3822                 assert(path_len >= 1);
3823                 type_path_entry_t *entry        = & path.path[path_len-1];
3824                 ir_initializer_t  *tinitializer = entry->initializer;
3825                 set_initializer_compound_value(tinitializer, entry->index,
3826                                                sub_irinitializer);
3827
3828                 advance_current_object(&path);
3829         }
3830
3831         assert(ARR_LEN(path.path) >= 1);
3832         ir_initializer_t *result = path.path[0].initializer;
3833         DEL_ARR_F(path.path);
3834
3835         return result;
3836 }
3837
3838 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3839 {
3840         type = skip_typeref(type);
3841
3842         assert(type->kind == TYPE_ARRAY);
3843         assert(type->array.size_constant);
3844         string_literal_expression_t const *const str = get_init_string(init);
3845         size_t            const str_len = str->value.size;
3846         size_t            const arr_len = type->array.size;
3847         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
3848         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
3849         char const       *      p       = str->value.begin;
3850         switch (str->value.encoding) {
3851         case STRING_ENCODING_CHAR:
3852         case STRING_ENCODING_UTF8:
3853                 for (size_t i = 0; i != arr_len; ++i) {
3854                         char              const c      = i < str_len ? *p++ : 0;
3855                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3856                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3857                         set_initializer_compound_value(irinit, i, tvinit);
3858                 }
3859                 break;
3860
3861         case STRING_ENCODING_CHAR16:
3862         case STRING_ENCODING_CHAR32:
3863         case STRING_ENCODING_WIDE:
3864                 for (size_t i = 0; i != arr_len; ++i) {
3865                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
3866                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3867                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3868                         set_initializer_compound_value(irinit, i, tvinit);
3869                 }
3870                 break;
3871         }
3872
3873         return irinit;
3874 }
3875
3876 static ir_initializer_t *create_ir_initializer(
3877                 const initializer_t *initializer, type_t *type)
3878 {
3879         switch(initializer->kind) {
3880                 case INITIALIZER_STRING:
3881                         return create_ir_initializer_string(initializer, type);
3882
3883                 case INITIALIZER_LIST:
3884                         return create_ir_initializer_list(&initializer->list, type);
3885
3886                 case INITIALIZER_VALUE:
3887                         return create_ir_initializer_value(&initializer->value);
3888
3889                 case INITIALIZER_DESIGNATOR:
3890                         panic("unexpected designator initializer");
3891         }
3892         panic("unknown initializer");
3893 }
3894
3895 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
3896  *  are elements [...] the remainder of the aggregate shall be initialized
3897  *  implicitly the same as objects that have static storage duration. */
3898 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3899                 ir_node *base_addr)
3900 {
3901         /* for unions we must NOT do anything for null initializers */
3902         ir_type *owner = get_entity_owner(entity);
3903         if (is_Union_type(owner)) {
3904                 return;
3905         }
3906
3907         ir_type *ent_type = get_entity_type(entity);
3908         /* create sub-initializers for a compound type */
3909         if (is_compound_type(ent_type)) {
3910                 unsigned n_members = get_compound_n_members(ent_type);
3911                 for (unsigned n = 0; n < n_members; ++n) {
3912                         ir_entity *member = get_compound_member(ent_type, n);
3913                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3914                                                                 member);
3915                         create_dynamic_null_initializer(member, dbgi, addr);
3916                 }
3917                 return;
3918         }
3919         if (is_Array_type(ent_type)) {
3920                 assert(has_array_upper_bound(ent_type, 0));
3921                 long n = get_array_upper_bound_int(ent_type, 0);
3922                 for (long i = 0; i < n; ++i) {
3923                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3924                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3925                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3926                         ir_node   *in[1]    = { cnst };
3927                         ir_entity *arrent   = get_array_element_entity(ent_type);
3928                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3929                                                         arrent);
3930                         create_dynamic_null_initializer(arrent, dbgi, addr);
3931                 }
3932                 return;
3933         }
3934
3935         ir_mode *value_mode = get_type_mode(ent_type);
3936         ir_node *node       = new_Const(get_mode_null(value_mode));
3937
3938         /* is it a bitfield type? */
3939         if (is_Primitive_type(ent_type) &&
3940                         get_primitive_base_type(ent_type) != NULL) {
3941                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3942                 return;
3943         }
3944
3945         ir_node *mem    = get_store();
3946         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3947         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3948         set_store(proj_m);
3949 }
3950
3951 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3952                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3953 {
3954         switch(get_initializer_kind(initializer)) {
3955         case IR_INITIALIZER_NULL:
3956                 create_dynamic_null_initializer(entity, dbgi, base_addr);
3957                 return;
3958         case IR_INITIALIZER_CONST: {
3959                 ir_node *node     = get_initializer_const_value(initializer);
3960                 ir_type *ent_type = get_entity_type(entity);
3961
3962                 /* is it a bitfield type? */
3963                 if (is_Primitive_type(ent_type) &&
3964                                 get_primitive_base_type(ent_type) != NULL) {
3965                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3966                         return;
3967                 }
3968
3969                 ir_node *mem = get_store();
3970                 ir_node *new_mem;
3971                 if (is_compound_type(ent_type)) {
3972                         ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3973                         new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3974                 } else {
3975                         assert(get_type_mode(type) == get_irn_mode(node));
3976                         ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3977                         new_mem = new_Proj(store, mode_M, pn_Store_M);
3978                 }
3979                 set_store(new_mem);
3980                 return;
3981         }
3982         case IR_INITIALIZER_TARVAL: {
3983                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
3984                 ir_node   *cnst     = new_d_Const(dbgi, tv);
3985                 ir_type   *ent_type = get_entity_type(entity);
3986
3987                 /* is it a bitfield type? */
3988                 if (is_Primitive_type(ent_type) &&
3989                                 get_primitive_base_type(ent_type) != NULL) {
3990                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3991                         return;
3992                 }
3993
3994                 assert(get_type_mode(type) == get_tarval_mode(tv));
3995                 ir_node *mem    = get_store();
3996                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3997                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3998                 set_store(proj_m);
3999                 return;
4000         }
4001         case IR_INITIALIZER_COMPOUND: {
4002                 assert(is_compound_type(type) || is_Array_type(type));
4003                 int n_members;
4004                 if (is_Array_type(type)) {
4005                         assert(has_array_upper_bound(type, 0));
4006                         n_members = get_array_upper_bound_int(type, 0);
4007                 } else {
4008                         n_members = get_compound_n_members(type);
4009                 }
4010
4011                 if (get_initializer_compound_n_entries(initializer)
4012                                 != (unsigned) n_members)
4013                         panic("initializer doesn't match compound type");
4014
4015                 for (int i = 0; i < n_members; ++i) {
4016                         ir_node   *addr;
4017                         ir_type   *irtype;
4018                         ir_entity *sub_entity;
4019                         if (is_Array_type(type)) {
4020                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4021                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4022                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4023                                 ir_node   *in[1]    = { cnst };
4024                                 irtype     = get_array_element_type(type);
4025                                 sub_entity = get_array_element_entity(type);
4026                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4027                                                        sub_entity);
4028                         } else {
4029                                 sub_entity = get_compound_member(type, i);
4030                                 irtype     = get_entity_type(sub_entity);
4031                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4032                                                              sub_entity);
4033                         }
4034
4035                         ir_initializer_t *sub_init
4036                                 = get_initializer_compound_value(initializer, i);
4037
4038                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4039                                                        addr);
4040                 }
4041                 return;
4042         }
4043         }
4044
4045         panic("invalid ir_initializer");
4046 }
4047
4048 static void create_dynamic_initializer(ir_initializer_t *initializer,
4049                 dbg_info *dbgi, ir_entity *entity)
4050 {
4051         ir_node *frame     = get_irg_frame(current_ir_graph);
4052         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4053         ir_type *type      = get_entity_type(entity);
4054
4055         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4056 }
4057
4058 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4059                                      ir_entity *entity, type_t *type)
4060 {
4061         ir_node *memory = get_store();
4062         ir_node *nomem  = new_NoMem();
4063         ir_node *frame  = get_irg_frame(current_ir_graph);
4064         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4065
4066         if (initializer->kind == INITIALIZER_VALUE) {
4067                 initializer_value_t *initializer_value = &initializer->value;
4068
4069                 ir_node *value = expression_to_firm(initializer_value->value);
4070                 type = skip_typeref(type);
4071                 assign_value(dbgi, addr, type, value);
4072                 return;
4073         }
4074
4075         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4076                 ir_initializer_t *irinitializer
4077                         = create_ir_initializer(initializer, type);
4078
4079                 create_dynamic_initializer(irinitializer, dbgi, entity);
4080                 return;
4081         }
4082
4083         /* create a "template" entity which is copied to the entity on the stack */
4084         ir_entity *const init_entity
4085                 = create_initializer_entity(dbgi, initializer, type);
4086         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4087         ir_type *const irtype   = get_ir_type(type);
4088         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4089
4090         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4091         set_store(copyb_mem);
4092 }
4093
4094 static void create_initializer_local_variable_entity(entity_t *entity)
4095 {
4096         assert(entity->kind == ENTITY_VARIABLE);
4097         initializer_t *initializer = entity->variable.initializer;
4098         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4099         ir_entity     *irentity    = entity->variable.v.entity;
4100         type_t        *type        = entity->declaration.type;
4101
4102         create_local_initializer(initializer, dbgi, irentity, type);
4103 }
4104
4105 static void create_variable_initializer(entity_t *entity)
4106 {
4107         assert(entity->kind == ENTITY_VARIABLE);
4108         initializer_t *initializer = entity->variable.initializer;
4109         if (initializer == NULL)
4110                 return;
4111
4112         declaration_kind_t declaration_kind
4113                 = (declaration_kind_t) entity->declaration.kind;
4114         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4115                 create_initializer_local_variable_entity(entity);
4116                 return;
4117         }
4118
4119         type_t            *type = entity->declaration.type;
4120         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4121
4122         if (initializer->kind == INITIALIZER_VALUE) {
4123                 expression_t *      value     = initializer->value.value;
4124                 type_t       *const init_type = skip_typeref(value->base.type);
4125
4126                 if (!is_type_scalar(init_type)) {
4127                         /* skip convs */
4128                         while (value->kind == EXPR_UNARY_CAST)
4129                                 value = value->unary.value;
4130
4131                         if (value->kind != EXPR_COMPOUND_LITERAL)
4132                                 panic("expected non-scalar initializer to be a compound literal");
4133                         initializer = value->compound_literal.initializer;
4134                         goto have_initializer;
4135                 }
4136
4137                 ir_node  *      node = expression_to_firm(value);
4138                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4139                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4140                 node = create_conv(dbgi, node, mode);
4141
4142                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4143                         set_value(entity->variable.v.value_number, node);
4144                 } else {
4145                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4146
4147                         ir_entity *irentity = entity->variable.v.entity;
4148
4149                         if (tq & TYPE_QUALIFIER_CONST
4150                                         && get_entity_owner(irentity) != get_tls_type()) {
4151                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4152                         }
4153                         set_atomic_ent_value(irentity, node);
4154                 }
4155         } else {
4156 have_initializer:
4157                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4158                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4159
4160                 ir_entity        *irentity        = entity->variable.v.entity;
4161                 ir_initializer_t *irinitializer
4162                         = create_ir_initializer(initializer, type);
4163
4164                 if (tq & TYPE_QUALIFIER_CONST) {
4165                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4166                 }
4167                 set_entity_initializer(irentity, irinitializer);
4168         }
4169 }
4170
4171 static void create_variable_length_array(entity_t *entity)
4172 {
4173         assert(entity->kind == ENTITY_VARIABLE);
4174         assert(entity->variable.initializer == NULL);
4175
4176         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4177         entity->variable.v.vla_base = NULL;
4178
4179         /* TODO: record VLA somewhere so we create the free node when we leave
4180          * it's scope */
4181 }
4182
4183 static void allocate_variable_length_array(entity_t *entity)
4184 {
4185         assert(entity->kind == ENTITY_VARIABLE);
4186         assert(entity->variable.initializer == NULL);
4187         assert(currently_reachable());
4188
4189         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4190         type_t   *type      = entity->declaration.type;
4191         ir_type  *el_type   = get_ir_type(type->array.element_type);
4192
4193         /* make sure size_node is calculated */
4194         get_type_size_node(type);
4195         ir_node  *elems = type->array.size_node;
4196         ir_node  *mem   = get_store();
4197         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4198
4199         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4200         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4201         set_store(proj_m);
4202
4203         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4204         entity->variable.v.vla_base = addr;
4205 }
4206
4207 static bool var_needs_entity(variable_t const *const var)
4208 {
4209         if (var->address_taken)
4210                 return true;
4211         type_t *const type = skip_typeref(var->base.type);
4212         return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4213 }
4214
4215 /**
4216  * Creates a Firm local variable from a declaration.
4217  */
4218 static void create_local_variable(entity_t *entity)
4219 {
4220         assert(entity->kind == ENTITY_VARIABLE);
4221         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4222
4223         if (!var_needs_entity(&entity->variable)) {
4224                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4225                 entity->variable.v.value_number = next_value_number_function;
4226                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4227                 ++next_value_number_function;
4228                 return;
4229         }
4230
4231         /* is it a variable length array? */
4232         type_t *const type = skip_typeref(entity->declaration.type);
4233         if (is_type_array(type) && !type->array.size_constant) {
4234                 create_variable_length_array(entity);
4235                 return;
4236         }
4237
4238         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4239         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4240 }
4241
4242 static void create_local_static_variable(entity_t *entity)
4243 {
4244         assert(entity->kind == ENTITY_VARIABLE);
4245         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4246
4247         type_t   *type           = skip_typeref(entity->declaration.type);
4248         ir_type  *const var_type = entity->variable.thread_local ?
4249                 get_tls_type() : get_glob_type();
4250         ir_type  *const irtype   = get_ir_type(type);
4251         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4252
4253         size_t l = strlen(entity->base.symbol->string);
4254         char   buf[l + sizeof(".%u")];
4255         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4256         ident     *const id       = id_unique(buf);
4257         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4258
4259         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4260                 set_entity_volatility(irentity, volatility_is_volatile);
4261         }
4262
4263         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4264         entity->variable.v.entity = irentity;
4265
4266         set_entity_ld_ident(irentity, id);
4267         set_entity_visibility(irentity, ir_visibility_local);
4268
4269         if (entity->variable.initializer == NULL) {
4270                 ir_initializer_t *null_init = get_initializer_null();
4271                 set_entity_initializer(irentity, null_init);
4272         }
4273
4274         PUSH_IRG(get_const_code_irg());
4275         create_variable_initializer(entity);
4276         POP_IRG();
4277 }
4278
4279
4280
4281 static ir_node *return_statement_to_firm(return_statement_t *statement)
4282 {
4283         if (!currently_reachable())
4284                 return NULL;
4285
4286         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4287         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4288         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4289
4290         int in_len;
4291         if (!is_type_void(type)) {
4292                 ir_mode *const mode = get_ir_mode_storage(type);
4293                 if (res) {
4294                         res = create_conv(dbgi, res, mode);
4295                 } else {
4296                         res = new_Unknown(mode);
4297                 }
4298                 in_len = 1;
4299         } else {
4300                 in_len = 0;
4301         }
4302
4303         ir_node *const in[1] = { res };
4304         ir_node *const store = get_store();
4305         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4306
4307         ir_node *end_block = get_irg_end_block(current_ir_graph);
4308         add_immBlock_pred(end_block, ret);
4309
4310         set_unreachable_now();
4311         return NULL;
4312 }
4313
4314 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4315 {
4316         if (!currently_reachable())
4317                 return NULL;
4318
4319         return expression_to_firm(statement->expression);
4320 }
4321
4322 static void create_local_declarations(entity_t*);
4323
4324 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4325 {
4326         create_local_declarations(compound->scope.entities);
4327
4328         ir_node     *result    = NULL;
4329         statement_t *statement = compound->statements;
4330         for ( ; statement != NULL; statement = statement->base.next) {
4331                 result = statement_to_firm(statement);
4332         }
4333
4334         return result;
4335 }
4336
4337 static void create_global_variable(entity_t *entity)
4338 {
4339         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4340         ir_visibility       visibility = ir_visibility_external;
4341         storage_class_tag_t storage
4342                 = (storage_class_tag_t)entity->declaration.storage_class;
4343         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4344         assert(entity->kind == ENTITY_VARIABLE);
4345
4346         switch (storage) {
4347         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4348         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4349         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4350         case STORAGE_CLASS_TYPEDEF:
4351         case STORAGE_CLASS_AUTO:
4352         case STORAGE_CLASS_REGISTER:
4353                 panic("invalid storage class for global var");
4354         }
4355
4356         /* "common" symbols */
4357         if (storage == STORAGE_CLASS_NONE
4358             && entity->variable.initializer == NULL
4359             && !entity->variable.thread_local
4360             && (modifiers & DM_WEAK) == 0) {
4361                 linkage |= IR_LINKAGE_MERGE;
4362         }
4363
4364         ir_type *var_type = get_glob_type();
4365         if (entity->variable.thread_local) {
4366                 var_type = get_tls_type();
4367         }
4368         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4369         ir_entity *irentity = entity->variable.v.entity;
4370         add_entity_linkage(irentity, linkage);
4371         set_entity_visibility(irentity, visibility);
4372         if (entity->variable.initializer == NULL
4373             && storage != STORAGE_CLASS_EXTERN) {
4374                 ir_initializer_t *null_init = get_initializer_null();
4375                 set_entity_initializer(irentity, null_init);
4376         }
4377 }
4378
4379 static void create_local_declaration(entity_t *entity)
4380 {
4381         assert(is_declaration(entity));
4382
4383         /* construct type */
4384         (void) get_ir_type(entity->declaration.type);
4385         if (entity->base.symbol == NULL) {
4386                 return;
4387         }
4388
4389         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4390         case STORAGE_CLASS_STATIC:
4391                 if (entity->kind == ENTITY_FUNCTION) {
4392                         (void)get_function_entity(entity, NULL);
4393                 } else {
4394                         create_local_static_variable(entity);
4395                 }
4396                 return;
4397         case STORAGE_CLASS_EXTERN:
4398                 if (entity->kind == ENTITY_FUNCTION) {
4399                         assert(entity->function.body == NULL);
4400                         (void)get_function_entity(entity, NULL);
4401                 } else {
4402                         create_global_variable(entity);
4403                         create_variable_initializer(entity);
4404                 }
4405                 return;
4406         case STORAGE_CLASS_NONE:
4407         case STORAGE_CLASS_AUTO:
4408         case STORAGE_CLASS_REGISTER:
4409                 if (entity->kind == ENTITY_FUNCTION) {
4410                         if (entity->function.body != NULL) {
4411                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4412                                 (void)get_function_entity(entity, owner);
4413                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4414                                 enqueue_inner_function(entity);
4415                         } else {
4416                                 (void)get_function_entity(entity, NULL);
4417                         }
4418                 } else {
4419                         create_local_variable(entity);
4420                 }
4421                 return;
4422         case STORAGE_CLASS_TYPEDEF:
4423                 break;
4424         }
4425         panic("invalid storage class");
4426 }
4427
4428 static void create_local_declarations(entity_t *e)
4429 {
4430         for (; e; e = e->base.next) {
4431                 if (is_declaration(e))
4432                         create_local_declaration(e);
4433         }
4434 }
4435
4436 static void initialize_local_declaration(entity_t *entity)
4437 {
4438         if (entity->base.symbol == NULL)
4439                 return;
4440
4441         // no need to emit code in dead blocks
4442         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4443                         && !currently_reachable())
4444                 return;
4445
4446         switch ((declaration_kind_t) entity->declaration.kind) {
4447         case DECLARATION_KIND_LOCAL_VARIABLE:
4448         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4449                 create_variable_initializer(entity);
4450                 return;
4451
4452         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4453                 allocate_variable_length_array(entity);
4454                 return;
4455
4456         case DECLARATION_KIND_COMPOUND_MEMBER:
4457         case DECLARATION_KIND_GLOBAL_VARIABLE:
4458         case DECLARATION_KIND_FUNCTION:
4459         case DECLARATION_KIND_INNER_FUNCTION:
4460                 return;
4461
4462         case DECLARATION_KIND_PARAMETER:
4463         case DECLARATION_KIND_PARAMETER_ENTITY:
4464                 panic("can't initialize parameters");
4465
4466         case DECLARATION_KIND_UNKNOWN:
4467                 panic("can't initialize unknown declaration");
4468         }
4469         panic("invalid declaration kind");
4470 }
4471
4472 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4473 {
4474         entity_t *entity = statement->declarations_begin;
4475         if (entity == NULL)
4476                 return NULL;
4477
4478         entity_t *const last = statement->declarations_end;
4479         for ( ;; entity = entity->base.next) {
4480                 if (is_declaration(entity)) {
4481                         initialize_local_declaration(entity);
4482                 } else if (entity->kind == ENTITY_TYPEDEF) {
4483                         /* §6.7.7:3  Any array size expressions associated with variable length
4484                          * array declarators are evaluated each time the declaration of the
4485                          * typedef name is reached in the order of execution. */
4486                         type_t *const type = skip_typeref(entity->typedefe.type);
4487                         if (is_type_array(type) && type->array.is_vla)
4488                                 get_vla_size(&type->array);
4489                 }
4490                 if (entity == last)
4491                         break;
4492         }
4493
4494         return NULL;
4495 }
4496
4497 static ir_node *if_statement_to_firm(if_statement_t *statement)
4498 {
4499         create_local_declarations(statement->scope.entities);
4500
4501         /* Create the condition. */
4502         jump_target true_target;
4503         jump_target false_target;
4504         init_jump_target(&true_target,  NULL);
4505         init_jump_target(&false_target, NULL);
4506         if (currently_reachable())
4507                 create_condition_evaluation(statement->condition, &true_target, &false_target);
4508
4509         jump_target exit_target;
4510         init_jump_target(&exit_target, NULL);
4511
4512         /* Create the true statement. */
4513         enter_jump_target(&true_target);
4514         statement_to_firm(statement->true_statement);
4515         jump_to_target(&exit_target);
4516
4517         /* Create the false statement. */
4518         enter_jump_target(&false_target);
4519         if (statement->false_statement)
4520                 statement_to_firm(statement->false_statement);
4521         jump_to_target(&exit_target);
4522
4523         enter_jump_target(&exit_target);
4524         return NULL;
4525 }
4526
4527 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4528 {
4529         create_local_declarations(statement->scope.entities);
4530
4531         PUSH_BREAK(NULL);
4532         PUSH_CONTINUE(NULL);
4533
4534         expression_t *const cond = statement->condition;
4535         /* Avoid an explicit body block in case of do ... while (0);. */
4536         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4537                 /* do ... while (0);. */
4538                 statement_to_firm(statement->body);
4539                 jump_to_target(&continue_target);
4540                 enter_jump_target(&continue_target);
4541                 jump_to_target(&break_target);
4542         } else {
4543                 jump_target body_target;
4544                 init_jump_target(&body_target, NULL);
4545                 jump_to_target(&body_target);
4546                 enter_immature_jump_target(&body_target);
4547                 keep_loop();
4548                 statement_to_firm(statement->body);
4549                 jump_to_target(&continue_target);
4550                 if (enter_jump_target(&continue_target))
4551                         create_condition_evaluation(statement->condition, &body_target, &break_target);
4552                 enter_jump_target(&body_target);
4553         }
4554         enter_jump_target(&break_target);
4555
4556         POP_CONTINUE();
4557         POP_BREAK();
4558         return NULL;
4559 }
4560
4561 static ir_node *for_statement_to_firm(for_statement_t *statement)
4562 {
4563         create_local_declarations(statement->scope.entities);
4564
4565         if (currently_reachable()) {
4566                 entity_t *entity = statement->scope.entities;
4567                 for ( ; entity != NULL; entity = entity->base.next) {
4568                         if (!is_declaration(entity))
4569                                 continue;
4570
4571                         initialize_local_declaration(entity);
4572                 }
4573
4574                 if (statement->initialisation != NULL) {
4575                         expression_to_firm(statement->initialisation);
4576                 }
4577         }
4578
4579         /* Create the header block */
4580         jump_target header_target;
4581         init_jump_target(&header_target, NULL);
4582         jump_to_target(&header_target);
4583         enter_immature_jump_target(&header_target);
4584         keep_loop();
4585
4586         expression_t *const step = statement->step;
4587         PUSH_BREAK(NULL);
4588         PUSH_CONTINUE(step ? NULL : header_target.block);
4589
4590         /* Create the condition. */
4591         expression_t *const cond = statement->condition;
4592         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4593                 jump_target body_target;
4594                 init_jump_target(&body_target, NULL);
4595                 create_condition_evaluation(cond, &body_target, &break_target);
4596                 enter_jump_target(&body_target);
4597         }
4598
4599         /* Create the loop body. */
4600         statement_to_firm(statement->body);
4601         jump_to_target(&continue_target);
4602
4603         /* Create the step code. */
4604         if (step && enter_jump_target(&continue_target)) {
4605                 expression_to_firm(step);
4606                 jump_to_target(&header_target);
4607         }
4608
4609         enter_jump_target(&header_target);
4610         enter_jump_target(&break_target);
4611
4612         POP_CONTINUE();
4613         POP_BREAK();
4614         return NULL;
4615 }
4616
4617 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4618 {
4619         /* determine number of cases */
4620         size_t n_cases = 0;
4621         for (case_label_statement_t *l = statement->first_case; l != NULL;
4622              l = l->next) {
4623                 /* default case */
4624                 if (l->expression == NULL)
4625                         continue;
4626                 if (l->is_empty_range)
4627                         continue;
4628                 ++n_cases;
4629         }
4630
4631         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4632         size_t           i   = 0;
4633         for (case_label_statement_t *l = statement->first_case; l != NULL;
4634              l = l->next) {
4635             if (l->expression == NULL) {
4636                         l->pn = pn_Switch_default;
4637                         continue;
4638                 }
4639                 if (l->is_empty_range)
4640                         continue;
4641                 ir_tarval *min = l->first_case;
4642                 ir_tarval *max = l->last_case;
4643                 long       pn  = (long) i+1;
4644                 ir_switch_table_set(res, i++, min, max, pn);
4645                 l->pn = pn;
4646         }
4647         return res;
4648 }
4649
4650 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4651 {
4652         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4653         ir_node  *switch_node = NULL;
4654
4655         if (currently_reachable()) {
4656                 ir_node *expression = expression_to_firm(statement->expression);
4657                 ir_switch_table *table = create_switch_table(statement);
4658                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4659
4660                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4661         }
4662
4663         set_unreachable_now();
4664
4665         PUSH_BREAK(NULL);
4666         ir_node *const old_switch            = current_switch;
4667         const bool     old_saw_default_label = saw_default_label;
4668         saw_default_label                    = false;
4669         current_switch                       = switch_node;
4670
4671         statement_to_firm(statement->body);
4672         jump_to_target(&break_target);
4673
4674         if (!saw_default_label && switch_node) {
4675                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4676                 add_pred_to_jump_target(&break_target, proj);
4677         }
4678
4679         enter_jump_target(&break_target);
4680
4681         assert(current_switch == switch_node);
4682         current_switch    = old_switch;
4683         saw_default_label = old_saw_default_label;
4684         POP_BREAK();
4685         return NULL;
4686 }
4687
4688 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4689 {
4690         if (current_switch != NULL && !statement->is_empty_range) {
4691                 jump_target case_target;
4692                 init_jump_target(&case_target, NULL);
4693
4694                 /* Fallthrough from previous case */
4695                 jump_to_target(&case_target);
4696
4697                 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4698                 add_pred_to_jump_target(&case_target, proj);
4699                 if (statement->expression == NULL)
4700                         saw_default_label = true;
4701
4702                 enter_jump_target(&case_target);
4703         }
4704
4705         return statement_to_firm(statement->statement);
4706 }
4707
4708 static ir_node *label_to_firm(const label_statement_t *statement)
4709 {
4710         label_t *const label = statement->label;
4711         prepare_label_target(label);
4712         jump_to_target(&label->target);
4713         if (--label->n_users == 0) {
4714                 enter_jump_target(&label->target);
4715         } else {
4716                 enter_immature_jump_target(&label->target);
4717                 keep_loop();
4718         }
4719
4720         return statement_to_firm(statement->statement);
4721 }
4722
4723 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4724 {
4725         label_t *const label = stmt->label;
4726         prepare_label_target(label);
4727         jump_to_target(&label->target);
4728         if (--label->n_users == 0)
4729                 enter_jump_target(&label->target);
4730         set_unreachable_now();
4731         return NULL;
4732 }
4733
4734 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4735 {
4736         if (currently_reachable()) {
4737                 ir_node *const op = expression_to_firm(statement->expression);
4738                 ARR_APP1(ir_node*, ijmp_ops, op);
4739                 jump_to_target(&ijmp_target);
4740                 set_unreachable_now();
4741         }
4742         return NULL;
4743 }
4744
4745 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4746 {
4747         bool           needs_memory = statement->is_volatile;
4748         size_t         n_clobbers   = 0;
4749         asm_clobber_t *clobber      = statement->clobbers;
4750         for ( ; clobber != NULL; clobber = clobber->next) {
4751                 const char *clobber_str = clobber->clobber.begin;
4752
4753                 if (!be_is_valid_clobber(clobber_str)) {
4754                         errorf(&statement->base.source_position,
4755                                    "invalid clobber '%s' specified", clobber->clobber);
4756                         continue;
4757                 }
4758
4759                 if (streq(clobber_str, "memory")) {
4760                         needs_memory = true;
4761                         continue;
4762                 }
4763
4764                 ident *id = new_id_from_str(clobber_str);
4765                 obstack_ptr_grow(&asm_obst, id);
4766                 ++n_clobbers;
4767         }
4768         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4769         ident **clobbers = NULL;
4770         if (n_clobbers > 0) {
4771                 clobbers = obstack_finish(&asm_obst);
4772         }
4773
4774         size_t n_inputs  = 0;
4775         asm_argument_t *argument = statement->inputs;
4776         for ( ; argument != NULL; argument = argument->next)
4777                 n_inputs++;
4778         size_t n_outputs = 0;
4779         argument = statement->outputs;
4780         for ( ; argument != NULL; argument = argument->next)
4781                 n_outputs++;
4782
4783         unsigned next_pos = 0;
4784
4785         ir_node *ins[n_inputs + n_outputs + 1];
4786         size_t   in_size = 0;
4787
4788         ir_asm_constraint tmp_in_constraints[n_outputs];
4789
4790         const expression_t *out_exprs[n_outputs];
4791         ir_node            *out_addrs[n_outputs];
4792         size_t              out_size = 0;
4793
4794         argument = statement->outputs;
4795         for ( ; argument != NULL; argument = argument->next) {
4796                 const char *constraints = argument->constraints.begin;
4797                 asm_constraint_flags_t asm_flags
4798                         = be_parse_asm_constraints(constraints);
4799
4800                 {
4801                         source_position_t const *const pos = &statement->base.source_position;
4802                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4803                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4804                         }
4805                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4806                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
4807                                 continue;
4808                         }
4809                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4810                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4811                                 continue;
4812                         }
4813                 }
4814
4815                 unsigned pos = next_pos++;
4816                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4817                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4818                         expression_t *expr = argument->expression;
4819                         ir_node      *addr = expression_to_addr(expr);
4820                         /* in+output, construct an artifical same_as constraint on the
4821                          * input */
4822                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4823                                 char     buf[64];
4824                                 ir_node *value = get_value_from_lvalue(expr, addr);
4825
4826                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4827
4828                                 ir_asm_constraint constraint;
4829                                 constraint.pos              = pos;
4830                                 constraint.constraint       = new_id_from_str(buf);
4831                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4832                                 tmp_in_constraints[in_size] = constraint;
4833                                 ins[in_size] = value;
4834
4835                                 ++in_size;
4836                         }
4837
4838                         out_exprs[out_size] = expr;
4839                         out_addrs[out_size] = addr;
4840                         ++out_size;
4841                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4842                         /* pure memory ops need no input (but we have to make sure we
4843                          * attach to the memory) */
4844                         assert(! (asm_flags &
4845                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4846                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4847                         needs_memory = true;
4848
4849                         /* we need to attach the address to the inputs */
4850                         expression_t *expr = argument->expression;
4851
4852                         ir_asm_constraint constraint;
4853                         constraint.pos              = pos;
4854                         constraint.constraint       = new_id_from_str(constraints);
4855                         constraint.mode             = mode_M;
4856                         tmp_in_constraints[in_size] = constraint;
4857
4858                         ins[in_size] = expression_to_addr(expr);
4859                         ++in_size;
4860                         continue;
4861                 } else {
4862                         errorf(&statement->base.source_position,
4863                                "only modifiers but no place set in constraints '%s'",
4864                                constraints);
4865                         continue;
4866                 }
4867
4868                 ir_asm_constraint constraint;
4869                 constraint.pos        = pos;
4870                 constraint.constraint = new_id_from_str(constraints);
4871                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
4872
4873                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4874         }
4875         assert(obstack_object_size(&asm_obst)
4876                         == out_size * sizeof(ir_asm_constraint));
4877         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4878
4879
4880         obstack_grow(&asm_obst, tmp_in_constraints,
4881                      in_size * sizeof(tmp_in_constraints[0]));
4882         /* find and count input and output arguments */
4883         argument = statement->inputs;
4884         for ( ; argument != NULL; argument = argument->next) {
4885                 const char *constraints = argument->constraints.begin;
4886                 asm_constraint_flags_t asm_flags
4887                         = be_parse_asm_constraints(constraints);
4888
4889                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4890                         errorf(&statement->base.source_position,
4891                                "some constraints in '%s' are not supported", constraints);
4892                         continue;
4893                 }
4894                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4895                         errorf(&statement->base.source_position,
4896                                "some constraints in '%s' are invalid", constraints);
4897                         continue;
4898                 }
4899                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4900                         errorf(&statement->base.source_position,
4901                                "write flag specified for input constraints '%s'",
4902                                constraints);
4903                         continue;
4904                 }
4905
4906                 ir_node *input;
4907                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4908                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4909                         /* we can treat this as "normal" input */
4910                         input = expression_to_firm(argument->expression);
4911                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4912                         /* pure memory ops need no input (but we have to make sure we
4913                          * attach to the memory) */
4914                         assert(! (asm_flags &
4915                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4916                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4917                         needs_memory = true;
4918                         input = expression_to_addr(argument->expression);
4919                 } else {
4920                         errorf(&statement->base.source_position,
4921                                "only modifiers but no place set in constraints '%s'",
4922                                constraints);
4923                         continue;
4924                 }
4925
4926                 ir_asm_constraint constraint;
4927                 constraint.pos        = next_pos++;
4928                 constraint.constraint = new_id_from_str(constraints);
4929                 constraint.mode       = get_irn_mode(input);
4930
4931                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4932                 ins[in_size++] = input;
4933         }
4934
4935         ir_node *mem = needs_memory ? get_store() : new_NoMem();
4936         assert(obstack_object_size(&asm_obst)
4937                         == in_size * sizeof(ir_asm_constraint));
4938         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4939
4940         /* create asm node */
4941         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4942
4943         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4944
4945         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4946                                   out_size, output_constraints,
4947                                   n_clobbers, clobbers, asm_text);
4948
4949         if (statement->is_volatile) {
4950                 set_irn_pinned(node, op_pin_state_pinned);
4951         } else {
4952                 set_irn_pinned(node, op_pin_state_floats);
4953         }
4954
4955         /* create output projs & connect them */
4956         if (needs_memory) {
4957                 ir_node *projm = new_Proj(node, mode_M, out_size);
4958                 set_store(projm);
4959         }
4960
4961         size_t i;
4962         for (i = 0; i < out_size; ++i) {
4963                 const expression_t *out_expr = out_exprs[i];
4964                 long                pn       = i;
4965                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
4966                 ir_node            *proj     = new_Proj(node, mode, pn);
4967                 ir_node            *addr     = out_addrs[i];
4968
4969                 set_value_for_expression_addr(out_expr, proj, addr);
4970         }
4971
4972         return NULL;
4973 }
4974
4975 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4976 {
4977         statement_to_firm(statement->try_statement);
4978         source_position_t const *const pos = &statement->base.source_position;
4979         warningf(WARN_OTHER, pos, "structured exception handling ignored");
4980         return NULL;
4981 }
4982
4983 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4984 {
4985         errorf(&statement->base.source_position, "__leave not supported yet");
4986         return NULL;
4987 }
4988
4989 /**
4990  * Transform a statement.
4991  */
4992 static ir_node *statement_to_firm(statement_t *const stmt)
4993 {
4994 #ifndef NDEBUG
4995         assert(!stmt->base.transformed);
4996         stmt->base.transformed = true;
4997 #endif
4998
4999         switch (stmt->kind) {
5000         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5001         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5002         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5003         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5004         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5005         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5006         case STATEMENT_EMPTY:         return NULL; /* nothing */
5007         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5008         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5009         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
5010         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5011         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5012         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5013         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5014         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5015         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5016
5017         {
5018                 jump_target *tgt;
5019         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
5020         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5021 jump:
5022                 jump_to_target(tgt);
5023                 set_unreachable_now();
5024                 return NULL;
5025         }
5026
5027         case STATEMENT_ERROR: panic("error statement");
5028         }
5029         panic("statement not implemented");
5030 }
5031
5032 static int count_local_variables(const entity_t *entity,
5033                                  const entity_t *const last)
5034 {
5035         int count = 0;
5036         entity_t const *const end = last != NULL ? last->base.next : NULL;
5037         for (; entity != end; entity = entity->base.next) {
5038                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5039                     !var_needs_entity(&entity->variable))
5040                         ++count;
5041         }
5042         return count;
5043 }
5044
5045 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5046 {
5047         int *const count = env;
5048
5049         switch (stmt->kind) {
5050         case STATEMENT_DECLARATION: {
5051                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5052                 *count += count_local_variables(decl_stmt->declarations_begin,
5053                                 decl_stmt->declarations_end);
5054                 break;
5055         }
5056
5057         case STATEMENT_FOR:
5058                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5059                 break;
5060
5061         default:
5062                 break;
5063         }
5064 }
5065
5066 /**
5067  * Return the number of local (alias free) variables used by a function.
5068  */
5069 static int get_function_n_local_vars(entity_t *entity)
5070 {
5071         const function_t *function = &entity->function;
5072         int count = 0;
5073
5074         /* count parameters */
5075         count += count_local_variables(function->parameters.entities, NULL);
5076
5077         /* count local variables declared in body */
5078         walk_statements(function->body, count_local_variables_in_stmt, &count);
5079         return count;
5080 }
5081
5082 /**
5083  * Build Firm code for the parameters of a function.
5084  */
5085 static void initialize_function_parameters(entity_t *entity)
5086 {
5087         assert(entity->kind == ENTITY_FUNCTION);
5088         ir_graph *irg             = current_ir_graph;
5089         ir_node  *args            = get_irg_args(irg);
5090         int       n               = 0;
5091         ir_type  *function_irtype;
5092
5093         if (entity->function.need_closure) {
5094                 /* add an extra parameter for the static link */
5095                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5096                 ++n;
5097
5098                 /* Matze: IMO this is wrong, nested functions should have an own
5099                  * type and not rely on strange parameters... */
5100                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5101         } else {
5102                 function_irtype = get_ir_type(entity->declaration.type);
5103         }
5104
5105
5106
5107         entity_t *parameter = entity->function.parameters.entities;
5108         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5109                 if (parameter->kind != ENTITY_PARAMETER)
5110                         continue;
5111
5112                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5113                 type_t *type = skip_typeref(parameter->declaration.type);
5114
5115                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.source_position);
5116                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5117                 if (var_needs_entity(&parameter->variable)) {
5118                         ir_type   *frame_type = get_irg_frame_type(irg);
5119                         ir_entity *param
5120                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5121                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5122                         parameter->variable.v.entity = param;
5123                         continue;
5124                 }
5125
5126                 ir_mode *param_mode = get_type_mode(param_irtype);
5127                 long     pn         = n;
5128                 ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5129
5130                 ir_mode *mode = get_ir_mode_storage(type);
5131                 value = create_conv(NULL, value, mode);
5132
5133                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5134                 parameter->variable.v.value_number = next_value_number_function;
5135                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5136                                         parameter);
5137                 ++next_value_number_function;
5138
5139                 set_value(parameter->variable.v.value_number, value);
5140         }
5141 }
5142
5143 static void add_function_pointer(ir_type *segment, ir_entity *method,
5144                                  const char *unique_template)
5145 {
5146         ir_type   *method_type  = get_entity_type(method);
5147         ir_type   *ptr_type     = new_type_pointer(method_type);
5148
5149         /* these entities don't really have a name but firm only allows
5150          * "" in ld_ident.
5151          * Note that we mustn't give these entities a name since for example
5152          * Mach-O doesn't allow them. */
5153         ident     *ide          = id_unique(unique_template);
5154         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5155         ir_graph  *irg          = get_const_code_irg();
5156         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5157                                                            method);
5158
5159         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5160         set_entity_compiler_generated(ptr, 1);
5161         set_entity_visibility(ptr, ir_visibility_private);
5162         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5163         set_atomic_ent_value(ptr, val);
5164 }
5165
5166 /**
5167  * Create code for a function and all inner functions.
5168  *
5169  * @param entity  the function entity
5170  */
5171 static void create_function(entity_t *entity)
5172 {
5173         assert(entity->kind == ENTITY_FUNCTION);
5174         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5175
5176         if (entity->function.body == NULL)
5177                 return;
5178
5179         inner_functions     = NULL;
5180         current_trampolines = NULL;
5181
5182         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5183                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5184                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5185         }
5186         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5187                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5188                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5189         }
5190
5191         current_function_entity = entity;
5192         current_function_name   = NULL;
5193         current_funcsig         = NULL;
5194
5195         assert(!ijmp_ops);
5196         assert(!ijmp_blocks);
5197         init_jump_target(&ijmp_target, NULL);
5198         ijmp_ops    = NEW_ARR_F(ir_node*, 0);
5199         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5200
5201         int       n_local_vars = get_function_n_local_vars(entity);
5202         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5203         current_ir_graph = irg;
5204
5205         ir_graph *old_current_function = current_function;
5206         current_function = irg;
5207
5208         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5209         current_vararg_entity = NULL;
5210
5211         set_irg_fp_model(irg, firm_fp_model);
5212         tarval_enable_fp_ops(1);
5213         set_irn_dbg_info(get_irg_start_block(irg),
5214                          get_entity_dbg_info(function_entity));
5215
5216         next_value_number_function = 0;
5217         initialize_function_parameters(entity);
5218         current_static_link = entity->function.static_link;
5219
5220         statement_to_firm(entity->function.body);
5221
5222         ir_node *end_block = get_irg_end_block(irg);
5223
5224         /* do we have a return statement yet? */
5225         if (currently_reachable()) {
5226                 type_t *type = skip_typeref(entity->declaration.type);
5227                 assert(is_type_function(type));
5228                 type_t *const return_type = skip_typeref(type->function.return_type);
5229
5230                 ir_node *ret;
5231                 if (is_type_void(return_type)) {
5232                         ret = new_Return(get_store(), 0, NULL);
5233                 } else {
5234                         ir_mode *const mode = get_ir_mode_storage(return_type);
5235
5236                         ir_node *in[1];
5237                         /* §5.1.2.2.3 main implicitly returns 0 */
5238                         if (is_main(entity)) {
5239                                 in[0] = new_Const(get_mode_null(mode));
5240                         } else {
5241                                 in[0] = new_Unknown(mode);
5242                         }
5243                         ret = new_Return(get_store(), 1, in);
5244                 }
5245                 add_immBlock_pred(end_block, ret);
5246         }
5247
5248         if (enter_jump_target(&ijmp_target)) {
5249                 keep_loop();
5250                 size_t   const n    = ARR_LEN(ijmp_ops);
5251                 ir_node *const op   = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5252                 ir_node *const ijmp = new_IJmp(op);
5253                 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5254                         ir_node *const block = ijmp_blocks[i];
5255                         add_immBlock_pred(block, ijmp);
5256                         mature_immBlock(block);
5257                 }
5258         }
5259
5260         DEL_ARR_F(ijmp_ops);
5261         DEL_ARR_F(ijmp_blocks);
5262         ijmp_ops    = NULL;
5263         ijmp_blocks = NULL;
5264
5265         irg_finalize_cons(irg);
5266
5267         /* finalize the frame type */
5268         ir_type *frame_type = get_irg_frame_type(irg);
5269         int      n          = get_compound_n_members(frame_type);
5270         int      align_all  = 4;
5271         int      offset     = 0;
5272         for (int i = 0; i < n; ++i) {
5273                 ir_entity *member      = get_compound_member(frame_type, i);
5274                 ir_type   *entity_type = get_entity_type(member);
5275
5276                 int align = get_type_alignment_bytes(entity_type);
5277                 if (align > align_all)
5278                         align_all = align;
5279                 int misalign = 0;
5280                 if (align > 0) {
5281                         misalign  = offset % align;
5282                         if (misalign > 0) {
5283                                 offset += align - misalign;
5284                         }
5285                 }
5286
5287                 set_entity_offset(member, offset);
5288                 offset += get_type_size_bytes(entity_type);
5289         }
5290         set_type_size_bytes(frame_type, offset);
5291         set_type_alignment_bytes(frame_type, align_all);
5292
5293         irg_verify(irg, VERIFY_ENFORCE_SSA);
5294         current_vararg_entity = old_current_vararg_entity;
5295         current_function      = old_current_function;
5296
5297         if (current_trampolines != NULL) {
5298                 DEL_ARR_F(current_trampolines);
5299                 current_trampolines = NULL;
5300         }
5301
5302         /* create inner functions if any */
5303         entity_t **inner = inner_functions;
5304         if (inner != NULL) {
5305                 ir_type *rem_outer_frame      = current_outer_frame;
5306                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5307                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5308                         create_function(inner[i]);
5309                 }
5310                 DEL_ARR_F(inner);
5311
5312                 current_outer_frame      = rem_outer_frame;
5313         }
5314 }
5315
5316 static void scope_to_firm(scope_t *scope)
5317 {
5318         /* first pass: create declarations */
5319         entity_t *entity = scope->entities;
5320         for ( ; entity != NULL; entity = entity->base.next) {
5321                 if (entity->base.symbol == NULL)
5322                         continue;
5323
5324                 if (entity->kind == ENTITY_FUNCTION) {
5325                         if (entity->function.btk != BUILTIN_NONE) {
5326                                 /* builtins have no representation */
5327                                 continue;
5328                         }
5329                         (void)get_function_entity(entity, NULL);
5330                 } else if (entity->kind == ENTITY_VARIABLE) {
5331                         create_global_variable(entity);
5332                 } else if (entity->kind == ENTITY_NAMESPACE) {
5333                         scope_to_firm(&entity->namespacee.members);
5334                 }
5335         }
5336
5337         /* second pass: create code/initializers */
5338         entity = scope->entities;
5339         for ( ; entity != NULL; entity = entity->base.next) {
5340                 if (entity->base.symbol == NULL)
5341                         continue;
5342
5343                 if (entity->kind == ENTITY_FUNCTION) {
5344                         if (entity->function.btk != BUILTIN_NONE) {
5345                                 /* builtins have no representation */
5346                                 continue;
5347                         }
5348                         create_function(entity);
5349                 } else if (entity->kind == ENTITY_VARIABLE) {
5350                         assert(entity->declaration.kind
5351                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5352                         current_ir_graph = get_const_code_irg();
5353                         create_variable_initializer(entity);
5354                 }
5355         }
5356 }
5357
5358 void init_ast2firm(void)
5359 {
5360         obstack_init(&asm_obst);
5361         init_atomic_modes();
5362
5363         ir_set_debug_retrieve(dbg_retrieve);
5364         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5365
5366         /* create idents for all known runtime functions */
5367         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5368                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5369         }
5370
5371         entitymap_init(&entitymap);
5372 }
5373
5374 static void init_ir_types(void)
5375 {
5376         static int ir_types_initialized = 0;
5377         if (ir_types_initialized)
5378                 return;
5379         ir_types_initialized = 1;
5380
5381         ir_type_char = get_ir_type(type_char);
5382
5383         be_params             = be_get_backend_param();
5384         mode_float_arithmetic = be_params->mode_float_arithmetic;
5385
5386         stack_param_align     = be_params->stack_param_align;
5387 }
5388
5389 void exit_ast2firm(void)
5390 {
5391         entitymap_destroy(&entitymap);
5392         obstack_free(&asm_obst, NULL);
5393 }
5394
5395 static void global_asm_to_firm(statement_t *s)
5396 {
5397         for (; s != NULL; s = s->base.next) {
5398                 assert(s->kind == STATEMENT_ASM);
5399
5400                 char const *const text = s->asms.asm_text.begin;
5401                 size_t      const size = s->asms.asm_text.size;
5402                 ident      *const id   = new_id_from_chars(text, size);
5403                 add_irp_asm(id);
5404         }
5405 }
5406
5407 static const char *get_cwd(void)
5408 {
5409         static char buf[1024];
5410         if (buf[0] == '\0') {
5411                 return getcwd(buf, sizeof(buf));
5412         }
5413         return buf;
5414 }
5415
5416 void translation_unit_to_firm(translation_unit_t *unit)
5417 {
5418         if (c_mode & _CXX) {
5419                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5420         } else if (c_mode & _C99) {
5421                 be_dwarf_set_source_language(DW_LANG_C99);
5422         } else if (c_mode & _C89) {
5423                 be_dwarf_set_source_language(DW_LANG_C89);
5424         } else {
5425                 be_dwarf_set_source_language(DW_LANG_C);
5426         }
5427         const char *cwd = get_cwd();
5428         if (cwd != NULL) {
5429                 be_dwarf_set_compilation_directory(cwd);
5430         }
5431
5432         /* initialize firm arithmetic */
5433         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5434         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5435
5436         /* just to be sure */
5437         init_jump_target(&break_target,    NULL);
5438         init_jump_target(&continue_target, NULL);
5439         current_switch           = NULL;
5440         current_translation_unit = unit;
5441
5442         init_ir_types();
5443
5444         scope_to_firm(&unit->scope);
5445         global_asm_to_firm(unit->global_asm);
5446
5447         current_ir_graph         = NULL;
5448         current_translation_unit = NULL;
5449 }