nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <unistd.h>
  26 #include <limits.h>
  27
  28 #include <libfirm/firm.h>
  29 #include <libfirm/adt/obst.h>
  30 #include <libfirm/be.h>
  31
  32 #include "ast2firm.h"
  33
  34 #include "adt/error.h"
  35 #include "adt/array.h"
  36 #include "adt/strutil.h"
  37 #include "adt/util.h"
  38 #include "jump_target.h"
  39 #include "symbol_t.h"
  40 #include "token_t.h"
  41 #include "type_t.h"
  42 #include "ast_t.h"
  43 #include "entity_t.h"
  44 #include "parser.h"
  45 #include "diagnostic.h"
  46 #include "lang_features.h"
  47 #include "types.h"
  48 #include "type_hash.h"
  49 #include "mangle.h"
  50 #include "walk.h"
  51 #include "warning.h"
  52 #include "printer.h"
  53 #include "entitymap_t.h"
  54 #include "driver/firm_opt.h"
  55
  56 typedef struct trampoline_region trampoline_region;
  57 struct trampoline_region {
  58         ir_entity        *function;    /**< The function that is called by this trampoline */
  59         ir_entity        *region;      /**< created region for the trampoline */
  60 };
  61
  62 fp_model_t firm_fp_model = fp_model_precise;
  63
  64 static const backend_params *be_params;
  65
  66 static ir_type *ir_type_char;
  67 static ir_type *ir_type_wchar_t;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int         next_value_number_function;
  76 static jump_target continue_target;
  77 static jump_target break_target;
  78 static ir_node    *current_switch;
  79 static bool        saw_default_label;
  80 static entity_t  **inner_functions;
  81 static ir_node    *ijmp_list;
  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("declaration_is_definition called on non-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                 elem_type = ir_type_char;
1138
1139                 ir_mode *const mode = get_type_mode(elem_type);
1140                 char const    *p    = value->begin;
1141                 for (size_t i = 0; i < slen; ++i) {
1142                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1143                         ir_initializer_t *val = create_initializer_tarval(tv);
1144                         set_initializer_compound_value(initializer, i, val);
1145                 }
1146                 goto finish;
1147         }
1148
1149         case STRING_ENCODING_WIDE: {
1150                 elem_type = ir_type_wchar_t;
1151
1152                 ir_mode *const mode = get_type_mode(elem_type);
1153                 char const    *p    = value->begin;
1154                 for (size_t i = 0; i < slen; ++i) {
1155                         assert(p <= value->begin + value->size);
1156                         utf32             v   = read_utf8_char(&p);
1157                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1158                         ir_initializer_t *val = create_initializer_tarval(tv);
1159                         set_initializer_compound_value(initializer, i, val);
1160                 }
1161                 goto finish;
1162         }
1163         }
1164         panic("invalid string encoding");
1165
1166 finish:;
1167         ir_type *const type = new_type_array(1, elem_type);
1168         set_array_bounds_int(type, 0, 0, slen);
1169         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1170         set_type_state(      type, layout_fixed);
1171
1172         ir_type   *const global_type = get_glob_type();
1173         ident     *const id          = id_unique(id_prefix);
1174         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1175         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1176         set_entity_ld_ident(   entity, id);
1177         set_entity_visibility( entity, ir_visibility_private);
1178         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1179         set_entity_initializer(entity, initializer);
1180
1181         return create_symconst(dbgi, entity);
1182 }
1183
1184 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1185 {
1186         assert(type->kind == TYPE_ATOMIC);
1187         atomic_type_kind_t akind = type->atomic.akind;
1188
1189         ir_mode    *const mode = atomic_modes[akind];
1190         char const *const str  = literal->value.begin;
1191         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1192         if (tv == tarval_bad)
1193                 return false;
1194
1195         literal->base.type    = type;
1196         literal->target_value = tv;
1197         return true;
1198 }
1199
1200 void determine_literal_type(literal_expression_t *const literal)
1201 {
1202         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1203
1204         /* -1: signed only, 0: any, 1: unsigned only */
1205         int const sign =
1206                 !is_type_signed(literal->base.type) ? 1 :
1207                 literal->value.begin[0] == '0'      ? 0 :
1208                 -1; /* Decimal literals only try signed types. */
1209
1210         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1211         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1212
1213         if (try_create_integer(literal, literal->base.type))
1214                 goto finished;
1215
1216         /* now try if the constant is small enough for some types */
1217         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1218                 goto finished;
1219         if (sign <= 0 && try_create_integer(literal, type_long))
1220                 goto finished;
1221         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1222                 goto finished;
1223         /* last try? then we should not report tarval_bad */
1224         if (sign < 0)
1225                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1226         if (sign <= 0 && try_create_integer(literal, type_long_long))
1227                 goto finished;
1228
1229         /* last try */
1230         assert(sign >= 0);
1231         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1232         bool res = try_create_integer(literal, type_unsigned_long_long);
1233         if (!res)
1234                 panic("internal error when parsing number literal");
1235
1236 finished:
1237         tarval_set_integer_overflow_mode(old_mode);
1238 }
1239
1240 /**
1241  * Creates a Const node representing a constant.
1242  */
1243 static ir_node *literal_to_firm(const literal_expression_t *literal)
1244 {
1245         type_t     *type   = skip_typeref(literal->base.type);
1246         ir_mode    *mode   = get_ir_mode_storage(type);
1247         const char *string = literal->value.begin;
1248         size_t      size   = literal->value.size;
1249         ir_tarval  *tv;
1250
1251         switch (literal->base.kind) {
1252         case EXPR_LITERAL_INTEGER:
1253                 assert(literal->target_value != NULL);
1254                 tv = literal->target_value;
1255                 break;
1256
1257         case EXPR_LITERAL_FLOATINGPOINT:
1258                 tv = new_tarval_from_str(string, size, mode);
1259                 break;
1260
1261         case EXPR_LITERAL_BOOLEAN:
1262                 if (string[0] == 't') {
1263                         tv = get_mode_one(mode);
1264                 } else {
1265                         assert(string[0] == 'f');
1266         case EXPR_LITERAL_MS_NOOP:
1267                         tv = get_mode_null(mode);
1268                 }
1269                 break;
1270
1271         default:
1272                 panic("Invalid literal kind found");
1273         }
1274
1275         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1276         ir_node  *res        = new_d_Const(dbgi, tv);
1277         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1278         return create_conv(dbgi, res, mode_arith);
1279 }
1280
1281 /**
1282  * Creates a Const node representing a character constant.
1283  */
1284 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1285 {
1286         type_t     *type   = skip_typeref(literal->base.type);
1287         ir_mode    *mode   = get_ir_mode_storage(type);
1288         const char *string = literal->value.begin;
1289         size_t      size   = literal->value.size;
1290         ir_tarval  *tv;
1291
1292         switch (literal->value.encoding) {
1293         case STRING_ENCODING_WIDE: {
1294                 utf32  v = read_utf8_char(&string);
1295                 char   buf[128];
1296                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1297
1298                 tv = new_tarval_from_str(buf, len, mode);
1299                 break;
1300         }
1301
1302         case STRING_ENCODING_CHAR: {
1303                 long long int v;
1304                 bool char_is_signed
1305                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1306                 if (size == 1 && char_is_signed) {
1307                         v = (signed char)string[0];
1308                 } else {
1309                         v = 0;
1310                         for (size_t i = 0; i < size; ++i) {
1311                                 v = (v << 8) | ((unsigned char)string[i]);
1312                         }
1313                 }
1314                 char   buf[128];
1315                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1316
1317                 tv = new_tarval_from_str(buf, len, mode);
1318                 break;
1319         }
1320
1321         default:
1322                 panic("Invalid literal kind found");
1323         }
1324
1325         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1326         ir_node  *res        = new_d_Const(dbgi, tv);
1327         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1328         return create_conv(dbgi, res, mode_arith);
1329 }
1330
1331 /*
1332  * Allocate an area of size bytes aligned at alignment
1333  * at a frame type.
1334  */
1335 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1336 {
1337         static unsigned area_cnt = 0;
1338         char buf[32];
1339
1340         ir_type *tp = new_type_array(1, ir_type_char);
1341         set_array_bounds_int(tp, 0, 0, size);
1342         set_type_alignment_bytes(tp, alignment);
1343
1344         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1345         ident *name = new_id_from_str(buf);
1346         ir_entity *area = new_entity(frame_type, name, tp);
1347
1348         /* mark this entity as compiler generated */
1349         set_entity_compiler_generated(area, 1);
1350         return area;
1351 }
1352
1353 /**
1354  * Return a node representing a trampoline region
1355  * for a given function entity.
1356  *
1357  * @param dbgi    debug info
1358  * @param entity  the function entity
1359  */
1360 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1361 {
1362         ir_entity *region = NULL;
1363         int        i;
1364
1365         if (current_trampolines != NULL) {
1366                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1367                         if (current_trampolines[i].function == entity) {
1368                                 region = current_trampolines[i].region;
1369                                 break;
1370                         }
1371                 }
1372         } else {
1373                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1374         }
1375         ir_graph *irg = current_ir_graph;
1376         if (region == NULL) {
1377                 /* create a new region */
1378                 ir_type           *frame_tp = get_irg_frame_type(irg);
1379                 trampoline_region  reg;
1380                 reg.function = entity;
1381
1382                 reg.region   = alloc_trampoline(frame_tp,
1383                                                 be_params->trampoline_size,
1384                                                 be_params->trampoline_align);
1385                 ARR_APP1(trampoline_region, current_trampolines, reg);
1386                 region = reg.region;
1387         }
1388         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1389                                region);
1390 }
1391
1392 /**
1393  * Creates a trampoline for a function represented by an entity.
1394  *
1395  * @param dbgi    debug info
1396  * @param mode    the (reference) mode for the function address
1397  * @param entity  the function entity
1398  */
1399 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1400                                   ir_entity *entity)
1401 {
1402         assert(entity != NULL);
1403         ir_node *in[3];
1404         in[0] = get_trampoline_region(dbgi, entity);
1405         in[1] = create_symconst(dbgi, entity);
1406         in[2] = get_irg_frame(current_ir_graph);
1407
1408         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1409         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1410         return new_Proj(irn, mode, pn_Builtin_max+1);
1411 }
1412
1413 /**
1414  * Dereference an address.
1415  *
1416  * @param dbgi  debug info
1417  * @param type  the type of the dereferenced result (the points_to type)
1418  * @param addr  the address to dereference
1419  */
1420 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1421                                       ir_node *const addr)
1422 {
1423         type_t *skipped = skip_typeref(type);
1424         if (is_type_incomplete(skipped))
1425                 return addr;
1426
1427         ir_type *irtype = get_ir_type(skipped);
1428         if (is_compound_type(irtype)
1429             || is_Method_type(irtype)
1430             || is_Array_type(irtype)) {
1431                 return addr;
1432         }
1433
1434         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1435                                   ? cons_volatile : cons_none;
1436         ir_mode *const mode     = get_type_mode(irtype);
1437         ir_node *const memory   = get_store();
1438         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1439         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1440         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1441
1442         set_store(load_mem);
1443
1444         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1445         return create_conv(dbgi, load_res, mode_arithmetic);
1446 }
1447
1448 /**
1449  * Returns the correct base address depending on whether it is a parameter or a
1450  * normal local variable.
1451  */
1452 static ir_node *get_local_frame(ir_entity *const ent)
1453 {
1454         ir_graph      *const irg   = current_ir_graph;
1455         const ir_type *const owner = get_entity_owner(ent);
1456         if (owner == current_outer_frame) {
1457                 assert(current_static_link != NULL);
1458                 return current_static_link;
1459         } else {
1460                 return get_irg_frame(irg);
1461         }
1462 }
1463
1464 /**
1465  * Keep all memory edges of the given block.
1466  */
1467 static void keep_all_memory(ir_node *block)
1468 {
1469         ir_node *old = get_cur_block();
1470
1471         set_cur_block(block);
1472         keep_alive(get_store());
1473         /* TODO: keep all memory edges from restricted pointers */
1474         set_cur_block(old);
1475 }
1476
1477 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1478 {
1479         entity_t *entity = ref->entity;
1480         if (entity->enum_value.tv == NULL) {
1481                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1482                 assert(type->kind == TYPE_ENUM);
1483                 determine_enum_values(&type->enumt);
1484         }
1485
1486         return new_Const(entity->enum_value.tv);
1487 }
1488
1489 static ir_node *reference_addr(const reference_expression_t *ref)
1490 {
1491         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1492         entity_t *entity = ref->entity;
1493         assert(is_declaration(entity));
1494
1495         if (entity->kind == ENTITY_FUNCTION
1496             && entity->function.btk != BUILTIN_NONE) {
1497                 ir_entity *irentity = get_function_entity(entity, NULL);
1498                 /* for gcc compatibility we have to produce (dummy) addresses for some
1499                  * builtins which don't have entities */
1500                 if (irentity == NULL) {
1501                         source_position_t const *const pos = &ref->base.source_position;
1502                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1503
1504                         /* simply create a NULL pointer */
1505                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1506                         ir_node  *res  = new_Const(get_mode_null(mode));
1507
1508                         return res;
1509                 }
1510         }
1511
1512         switch((declaration_kind_t) entity->declaration.kind) {
1513         case DECLARATION_KIND_UNKNOWN:
1514                 break;
1515         case DECLARATION_KIND_PARAMETER:
1516         case DECLARATION_KIND_LOCAL_VARIABLE:
1517                 /* you can store to a local variable (so we don't panic but return NULL
1518                  * as an indicator for no real address) */
1519                 return NULL;
1520         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1521                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1522                 return addr;
1523         }
1524
1525         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1526         case DECLARATION_KIND_PARAMETER_ENTITY: {
1527                 ir_entity *irentity = entity->variable.v.entity;
1528                 ir_node   *frame    = get_local_frame(irentity);
1529                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1530                 return sel;
1531         }
1532
1533         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1534                 return entity->variable.v.vla_base;
1535
1536         case DECLARATION_KIND_FUNCTION: {
1537                 return create_symconst(dbgi, entity->function.irentity);
1538         }
1539
1540         case DECLARATION_KIND_INNER_FUNCTION: {
1541                 type_t  *const type = skip_typeref(entity->declaration.type);
1542                 ir_mode *const mode = get_ir_mode_storage(type);
1543                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1544                         /* inner function not using the closure */
1545                         return create_symconst(dbgi, entity->function.irentity);
1546                 } else {
1547                         /* need trampoline here */
1548                         return create_trampoline(dbgi, mode, entity->function.irentity);
1549                 }
1550         }
1551
1552         case DECLARATION_KIND_COMPOUND_MEMBER:
1553                 panic("not implemented reference type");
1554         }
1555
1556         panic("reference to declaration with unknown type found");
1557 }
1558
1559 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1560 {
1561         dbg_info *const dbgi   = get_dbg_info(&ref->base.source_position);
1562         entity_t *const entity = ref->entity;
1563         assert(is_declaration(entity));
1564
1565         switch ((declaration_kind_t)entity->declaration.kind) {
1566         case DECLARATION_KIND_LOCAL_VARIABLE:
1567         case DECLARATION_KIND_PARAMETER: {
1568                 type_t  *const type  = skip_typeref(entity->declaration.type);
1569                 ir_mode *const mode  = get_ir_mode_storage(type);
1570                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1571                 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1572         }
1573
1574         default: {
1575                 ir_node *const addr = reference_addr(ref);
1576                 return deref_address(dbgi, entity->declaration.type, addr);
1577         }
1578         }
1579 }
1580
1581 /**
1582  * Transform calls to builtin functions.
1583  */
1584 static ir_node *process_builtin_call(const call_expression_t *call)
1585 {
1586         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1587
1588         assert(call->function->kind == EXPR_REFERENCE);
1589         reference_expression_t *builtin = &call->function->reference;
1590
1591         type_t *expr_type = skip_typeref(builtin->base.type);
1592         assert(is_type_pointer(expr_type));
1593
1594         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1595
1596         switch (builtin->entity->function.btk) {
1597         case BUILTIN_NONE:
1598                 break;
1599         case BUILTIN_ALLOCA: {
1600                 expression_t *argument = call->arguments->expression;
1601                 ir_node      *size     = expression_to_firm(argument);
1602
1603                 ir_node *store  = get_store();
1604                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1605                                               stack_alloc);
1606                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1607                 set_store(proj_m);
1608                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1609
1610                 return res;
1611         }
1612         case BUILTIN_INF: {
1613                 type_t    *type = function_type->function.return_type;
1614                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1615                 ir_tarval *tv   = get_mode_infinite(mode);
1616                 ir_node   *res  = new_d_Const(dbgi, tv);
1617                 return res;
1618         }
1619         case BUILTIN_NAN: {
1620                 /* Ignore string for now... */
1621                 assert(is_type_function(function_type));
1622                 type_t    *type = function_type->function.return_type;
1623                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1624                 ir_tarval *tv   = get_mode_NAN(mode);
1625                 ir_node   *res  = new_d_Const(dbgi, tv);
1626                 return res;
1627         }
1628         case BUILTIN_EXPECT: {
1629                 expression_t *argument = call->arguments->expression;
1630                 return _expression_to_firm(argument);
1631         }
1632         case BUILTIN_VA_END:
1633                 /* evaluate the argument of va_end for its side effects */
1634                 _expression_to_firm(call->arguments->expression);
1635                 return NULL;
1636         case BUILTIN_OBJECT_SIZE: {
1637                 /* determine value of "type" */
1638                 expression_t *type_expression = call->arguments->next->expression;
1639                 long          type_val        = fold_constant_to_int(type_expression);
1640                 type_t       *type            = function_type->function.return_type;
1641                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1642                 /* just produce a "I don't know" result */
1643                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1644                                                 get_mode_minus_one(mode);
1645
1646                 return new_d_Const(dbgi, result);
1647         }
1648         case BUILTIN_ROTL: {
1649                 ir_node *val  = expression_to_firm(call->arguments->expression);
1650                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1651                 ir_mode *mode = get_irn_mode(val);
1652                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1653                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1654         }
1655         case BUILTIN_ROTR: {
1656                 ir_node *val  = expression_to_firm(call->arguments->expression);
1657                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1658                 ir_mode *mode = get_irn_mode(val);
1659                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1660                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1661                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1662                 return new_d_Rotl(dbgi, val, sub, mode);
1663         }
1664         case BUILTIN_FIRM:
1665                 break;
1666         case BUILTIN_LIBC:
1667         case BUILTIN_LIBC_CHECK:
1668                 panic("builtin did not produce an entity");
1669         }
1670         panic("invalid builtin found");
1671 }
1672
1673 /**
1674  * Transform a call expression.
1675  * Handles some special cases, like alloca() calls, which must be resolved
1676  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1677  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1678  * handled right...
1679  */
1680 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1681 {
1682         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1683         assert(currently_reachable());
1684
1685         expression_t   *function = call->function;
1686         ir_node        *callee   = NULL;
1687         bool            firm_builtin = false;
1688         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1689         if (function->kind == EXPR_REFERENCE) {
1690                 const reference_expression_t *ref    = &function->reference;
1691                 entity_t                     *entity = ref->entity;
1692
1693                 if (entity->kind == ENTITY_FUNCTION) {
1694                         builtin_kind_t builtin = entity->function.btk;
1695                         if (builtin == BUILTIN_FIRM) {
1696                                 firm_builtin = true;
1697                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1698                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1699                                    && builtin != BUILTIN_LIBC_CHECK) {
1700                                 return process_builtin_call(call);
1701                         }
1702                 }
1703         }
1704         if (!firm_builtin)
1705                 callee = expression_to_firm(function);
1706
1707         type_t *type = skip_typeref(function->base.type);
1708         assert(is_type_pointer(type));
1709         pointer_type_t *pointer_type = &type->pointer;
1710         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1711         assert(is_type_function(points_to));
1712         function_type_t *function_type = &points_to->function;
1713
1714         int      n_parameters    = 0;
1715         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1716         ir_type *new_method_type = NULL;
1717         if (function_type->variadic || function_type->unspecified_parameters) {
1718                 const call_argument_t *argument = call->arguments;
1719                 for ( ; argument != NULL; argument = argument->next) {
1720                         ++n_parameters;
1721                 }
1722
1723                 /* we need to construct a new method type matching the call
1724                  * arguments... */
1725                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1726                 int n_res       = get_method_n_ress(ir_method_type);
1727                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1728                 set_method_calling_convention(new_method_type,
1729                                get_method_calling_convention(ir_method_type));
1730                 set_method_additional_properties(new_method_type,
1731                                get_method_additional_properties(ir_method_type));
1732                 set_method_variadicity(new_method_type,
1733                                        get_method_variadicity(ir_method_type));
1734
1735                 for (int i = 0; i < n_res; ++i) {
1736                         set_method_res_type(new_method_type, i,
1737                                             get_method_res_type(ir_method_type, i));
1738                 }
1739                 argument = call->arguments;
1740                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1741                         expression_t *expression = argument->expression;
1742                         ir_type      *irtype     = get_ir_type(expression->base.type);
1743                         set_method_param_type(new_method_type, i, irtype);
1744                 }
1745                 ir_method_type = new_method_type;
1746         } else {
1747                 n_parameters = get_method_n_params(ir_method_type);
1748         }
1749
1750         ir_node *in[n_parameters];
1751
1752         const call_argument_t *argument = call->arguments;
1753         for (int n = 0; n < n_parameters; ++n) {
1754                 expression_t *expression = argument->expression;
1755                 ir_node      *arg_node   = expression_to_firm(expression);
1756
1757                 type_t *arg_type = skip_typeref(expression->base.type);
1758                 if (!is_type_compound(arg_type)) {
1759                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1760                         arg_node = create_conv(dbgi, arg_node, mode);
1761                 }
1762
1763                 in[n] = arg_node;
1764
1765                 argument = argument->next;
1766         }
1767
1768         ir_node *store;
1769         if (function_type->modifiers & DM_CONST) {
1770                 store = get_irg_no_mem(current_ir_graph);
1771         } else {
1772                 store = get_store();
1773         }
1774
1775         ir_node *node;
1776         type_t  *return_type = skip_typeref(function_type->return_type);
1777         ir_node *result      = NULL;
1778         if (firm_builtin) {
1779                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1780                                      ir_method_type);
1781                 if (! (function_type->modifiers & DM_CONST)) {
1782                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1783                         set_store(mem);
1784                 }
1785
1786                 if (!is_type_void(return_type)) {
1787                         assert(is_type_scalar(return_type));
1788                         ir_mode *mode = get_ir_mode_storage(return_type);
1789                         result = new_Proj(node, mode, pn_Builtin_max+1);
1790                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1791                         result              = create_conv(NULL, result, mode_arith);
1792                 }
1793         } else {
1794                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1795                 if (! (function_type->modifiers & DM_CONST)) {
1796                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1797                         set_store(mem);
1798                 }
1799
1800                 if (!is_type_void(return_type)) {
1801                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1802                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1803                         result                    = new_Proj(resproj, mode, 0);
1804                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1805                         result                    = create_conv(NULL, result, mode_arith);
1806                 }
1807         }
1808
1809         if (function_type->modifiers & DM_NORETURN) {
1810                 /* A dead end:  Keep the Call and the Block.  Also place all further
1811                  * nodes into a new and unreachable block. */
1812                 keep_alive(node);
1813                 keep_alive(get_cur_block());
1814                 ir_node *block = new_Block(0, NULL);
1815                 set_cur_block(block);
1816         }
1817
1818         return result;
1819 }
1820
1821 static ir_node *statement_to_firm(statement_t *statement);
1822 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1823
1824 static ir_node *expression_to_addr(const expression_t *expression);
1825 static ir_node *create_condition_evaluation(expression_t const *expression, jump_target *true_target, jump_target *false_target);
1826
1827 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1828                          ir_node *value)
1829 {
1830         if (!is_type_compound(type)) {
1831                 ir_mode *mode = get_ir_mode_storage(type);
1832                 value         = create_conv(dbgi, value, mode);
1833         }
1834
1835         ir_node *memory = get_store();
1836
1837         if (is_type_scalar(type)) {
1838                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1839                                       ? cons_volatile : cons_none;
1840                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1841                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1842                 set_store(store_mem);
1843         } else {
1844                 ir_type *irtype    = get_ir_type(type);
1845                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1846                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1847                 set_store(copyb_mem);
1848         }
1849 }
1850
1851 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1852 {
1853         ir_tarval *all_one   = get_mode_all_one(mode);
1854         int        mode_size = get_mode_size_bits(mode);
1855         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1856
1857         assert(offset >= 0);
1858         assert(size   >= 0);
1859         assert(offset + size <= mode_size);
1860         if (size == mode_size) {
1861                 return all_one;
1862         }
1863
1864         long       shiftr    = get_mode_size_bits(mode) - size;
1865         long       shiftl    = offset;
1866         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1867         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1868         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1869         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1870
1871         return mask1;
1872 }
1873
1874 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1875                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1876                 bool need_return)
1877 {
1878         ir_type *entity_type = get_entity_type(entity);
1879         ir_type *base_type   = get_primitive_base_type(entity_type);
1880         ir_mode *mode        = get_type_mode(base_type);
1881         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1882
1883         value = create_conv(dbgi, value, mode);
1884
1885         /* kill upper bits of value and shift to right position */
1886         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1887         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1888         unsigned  base_bits  = get_mode_size_bits(mode);
1889         unsigned  shiftwidth = base_bits - bitsize;
1890
1891         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1892         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1893
1894         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1895         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1896         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1897
1898         /* load current value */
1899         ir_node   *mem             = get_store();
1900         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1901                                           set_volatile ? cons_volatile : cons_none);
1902         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1903         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1904         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1905         ir_tarval *inv_mask        = tarval_not(shift_mask);
1906         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1907         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1908
1909         /* construct new value and store */
1910         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1911         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1912                                          set_volatile ? cons_volatile : cons_none);
1913         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1914         set_store(store_mem);
1915
1916         if (!need_return)
1917                 return NULL;
1918
1919         ir_node *res_shr;
1920         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1921         if (mode_is_signed(mode)) {
1922                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1923         } else {
1924                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1925         }
1926         return res_shr;
1927 }
1928
1929 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1930                                          ir_node *addr)
1931 {
1932         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
1933         entity_t *entity    = expression->compound_entry;
1934         type_t   *base_type = entity->declaration.type;
1935         ir_mode  *mode      = get_ir_mode_storage(base_type);
1936         ir_node  *mem       = get_store();
1937         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1938         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1939         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1940         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1941
1942         ir_mode  *amode     = mode;
1943         /* optimisation, since shifting in modes < machine_size is usually
1944          * less efficient */
1945         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1946                 amode = mode_uint;
1947         }
1948         unsigned amode_size = get_mode_size_bits(amode);
1949         load_res = create_conv(dbgi, load_res, amode);
1950
1951         set_store(load_mem);
1952
1953         /* kill upper bits */
1954         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1955         unsigned   bitoffset   = entity->compound_member.bit_offset;
1956         unsigned   bitsize     = entity->compound_member.bit_size;
1957         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1958         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1959         ir_node   *countl      = new_d_Const(dbgi, tvl);
1960         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1961
1962         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1963         assert(shift_bitsr <= amode_size);
1964         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1965         ir_node   *countr      = new_d_Const(dbgi, tvr);
1966         ir_node   *shiftr;
1967         if (mode_is_signed(mode)) {
1968                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1969         } else {
1970                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1971         }
1972
1973         type_t  *type    = expression->base.type;
1974         ir_mode *resmode = get_ir_mode_arithmetic(type);
1975         return create_conv(dbgi, shiftr, resmode);
1976 }
1977
1978 /* make sure the selected compound type is constructed */
1979 static void construct_select_compound(const select_expression_t *expression)
1980 {
1981         type_t *type = skip_typeref(expression->compound->base.type);
1982         if (is_type_pointer(type)) {
1983                 type = type->pointer.points_to;
1984         }
1985         (void) get_ir_type(type);
1986 }
1987
1988 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1989                                               ir_node *value, ir_node *addr)
1990 {
1991         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1992         type_t   *type = skip_typeref(expression->base.type);
1993
1994         if (!is_type_compound(type)) {
1995                 ir_mode  *mode = get_ir_mode_storage(type);
1996                 value          = create_conv(dbgi, value, mode);
1997         }
1998
1999         if (expression->kind == EXPR_REFERENCE) {
2000                 const reference_expression_t *ref = &expression->reference;
2001
2002                 entity_t *entity = ref->entity;
2003                 assert(is_declaration(entity));
2004                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2005                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2006                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2007                         set_value(entity->variable.v.value_number, value);
2008                         return value;
2009                 }
2010         }
2011
2012         if (addr == NULL)
2013                 addr = expression_to_addr(expression);
2014         assert(addr != NULL);
2015
2016         if (expression->kind == EXPR_SELECT) {
2017                 const select_expression_t *select = &expression->select;
2018
2019                 construct_select_compound(select);
2020
2021                 entity_t *entity = select->compound_entry;
2022                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2023                 if (entity->compound_member.bitfield) {
2024                         ir_entity *irentity = entity->compound_member.entity;
2025                         bool       set_volatile
2026                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2027                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2028                                                        set_volatile, true);
2029                         return value;
2030                 }
2031         }
2032
2033         assign_value(dbgi, addr, type, value);
2034         return value;
2035 }
2036
2037 static void set_value_for_expression(const expression_t *expression,
2038                                      ir_node *value)
2039 {
2040         set_value_for_expression_addr(expression, value, NULL);
2041 }
2042
2043 static ir_node *get_value_from_lvalue(const expression_t *expression,
2044                                       ir_node *addr)
2045 {
2046         if (expression->kind == EXPR_REFERENCE) {
2047                 const reference_expression_t *ref = &expression->reference;
2048
2049                 entity_t *entity = ref->entity;
2050                 assert(entity->kind == ENTITY_VARIABLE
2051                                 || entity->kind == ENTITY_PARAMETER);
2052                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2053                 int value_number;
2054                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2055                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2056                         value_number = entity->variable.v.value_number;
2057                         assert(addr == NULL);
2058                         type_t  *type = skip_typeref(expression->base.type);
2059                         ir_mode *mode = get_ir_mode_storage(type);
2060                         ir_node *res  = get_value(value_number, mode);
2061                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2062                 }
2063         }
2064
2065         assert(addr != NULL);
2066         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2067
2068         ir_node *value;
2069         if (expression->kind == EXPR_SELECT &&
2070             expression->select.compound_entry->compound_member.bitfield) {
2071             construct_select_compound(&expression->select);
2072                 value = bitfield_extract_to_firm(&expression->select, addr);
2073         } else {
2074                 value = deref_address(dbgi, expression->base.type, addr);
2075         }
2076
2077         return value;
2078 }
2079
2080
2081 static ir_node *create_incdec(const unary_expression_t *expression)
2082 {
2083         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2084         const expression_t *value_expr = expression->value;
2085         ir_node            *addr       = expression_to_addr(value_expr);
2086         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2087
2088         type_t  *type = skip_typeref(expression->base.type);
2089         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2090
2091         ir_node *offset;
2092         if (is_type_pointer(type)) {
2093                 pointer_type_t *pointer_type = &type->pointer;
2094                 offset = get_type_size_node(pointer_type->points_to);
2095         } else {
2096                 assert(is_type_arithmetic(type));
2097                 offset = new_Const(get_mode_one(mode));
2098         }
2099
2100         ir_node *result;
2101         ir_node *store_value;
2102         switch(expression->base.kind) {
2103         case EXPR_UNARY_POSTFIX_INCREMENT:
2104                 result      = value;
2105                 store_value = new_d_Add(dbgi, value, offset, mode);
2106                 break;
2107         case EXPR_UNARY_POSTFIX_DECREMENT:
2108                 result      = value;
2109                 store_value = new_d_Sub(dbgi, value, offset, mode);
2110                 break;
2111         case EXPR_UNARY_PREFIX_INCREMENT:
2112                 result      = new_d_Add(dbgi, value, offset, mode);
2113                 store_value = result;
2114                 break;
2115         case EXPR_UNARY_PREFIX_DECREMENT:
2116                 result      = new_d_Sub(dbgi, value, offset, mode);
2117                 store_value = result;
2118                 break;
2119         default:
2120                 panic("no incdec expr in create_incdec");
2121         }
2122
2123         set_value_for_expression_addr(value_expr, store_value, addr);
2124
2125         return result;
2126 }
2127
2128 static bool is_local_variable(expression_t *expression)
2129 {
2130         if (expression->kind != EXPR_REFERENCE)
2131                 return false;
2132         reference_expression_t *ref_expr = &expression->reference;
2133         entity_t               *entity   = ref_expr->entity;
2134         if (entity->kind != ENTITY_VARIABLE)
2135                 return false;
2136         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2137         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2138 }
2139
2140 static ir_relation get_relation(const expression_kind_t kind)
2141 {
2142         switch(kind) {
2143         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2144         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2145         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2146         case EXPR_BINARY_ISLESS:
2147         case EXPR_BINARY_LESS:          return ir_relation_less;
2148         case EXPR_BINARY_ISLESSEQUAL:
2149         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2150         case EXPR_BINARY_ISGREATER:
2151         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2152         case EXPR_BINARY_ISGREATEREQUAL:
2153         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2154         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2155
2156         default:
2157                 break;
2158         }
2159         panic("trying to get ir_relation from non-comparison binexpr type");
2160 }
2161
2162 /**
2163  * Handle the assume optimizer hint: check if a Confirm
2164  * node can be created.
2165  *
2166  * @param dbi    debug info
2167  * @param expr   the IL assume expression
2168  *
2169  * we support here only some simple cases:
2170  *  - var rel const
2171  *  - const rel val
2172  *  - var rel var
2173  */
2174 static ir_node *handle_assume_compare(dbg_info *dbi,
2175                                       const binary_expression_t *expression)
2176 {
2177         expression_t *op1 = expression->left;
2178         expression_t *op2 = expression->right;
2179         entity_t     *var2, *var = NULL;
2180         ir_node      *res      = NULL;
2181         ir_relation   relation = get_relation(expression->base.kind);
2182
2183         if (is_local_variable(op1) && is_local_variable(op2)) {
2184                 var  = op1->reference.entity;
2185             var2 = op2->reference.entity;
2186
2187                 type_t  *const type = skip_typeref(var->declaration.type);
2188                 ir_mode *const mode = get_ir_mode_storage(type);
2189
2190                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2191                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2192
2193                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2194                 set_value(var2->variable.v.value_number, res);
2195
2196                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2197                 set_value(var->variable.v.value_number, res);
2198
2199                 return res;
2200         }
2201
2202         expression_t *con = NULL;
2203         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2204                 var = op1->reference.entity;
2205                 con = op2;
2206         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2207                 relation = get_inversed_relation(relation);
2208                 var = op2->reference.entity;
2209                 con = op1;
2210         }
2211
2212         if (var != NULL) {
2213                 type_t  *const type = skip_typeref(var->declaration.type);
2214                 ir_mode *const mode = get_ir_mode_storage(type);
2215
2216                 res = get_value(var->variable.v.value_number, mode);
2217                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2218                 set_value(var->variable.v.value_number, res);
2219         }
2220         return res;
2221 }
2222
2223 /**
2224  * Handle the assume optimizer hint.
2225  *
2226  * @param dbi    debug info
2227  * @param expr   the IL assume expression
2228  */
2229 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2230 {
2231         switch(expression->kind) {
2232         case EXPR_BINARY_EQUAL:
2233         case EXPR_BINARY_NOTEQUAL:
2234         case EXPR_BINARY_LESS:
2235         case EXPR_BINARY_LESSEQUAL:
2236         case EXPR_BINARY_GREATER:
2237         case EXPR_BINARY_GREATEREQUAL:
2238                 return handle_assume_compare(dbi, &expression->binary);
2239         default:
2240                 return NULL;
2241         }
2242 }
2243
2244 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2245                             type_t *from_type, type_t *type)
2246 {
2247         type = skip_typeref(type);
2248         if (is_type_void(type)) {
2249                 /* make sure firm type is constructed */
2250                 (void) get_ir_type(type);
2251                 return NULL;
2252         }
2253         if (!is_type_scalar(type)) {
2254                 /* make sure firm type is constructed */
2255                 (void) get_ir_type(type);
2256                 return value_node;
2257         }
2258
2259         from_type     = skip_typeref(from_type);
2260         ir_mode *mode = get_ir_mode_storage(type);
2261         /* check for conversion from / to __based types */
2262         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2263                 const variable_t *from_var = from_type->pointer.base_variable;
2264                 const variable_t *to_var   = type->pointer.base_variable;
2265                 if (from_var != to_var) {
2266                         if (from_var != NULL) {
2267                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2268                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2269                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2270                         }
2271                         if (to_var != NULL) {
2272                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2273                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2274                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2275                         }
2276                 }
2277         }
2278
2279         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2280                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2281                  * convert to mode_b so we only get a 0/1 value */
2282                 value_node = create_conv(dbgi, value_node, mode_b);
2283         }
2284
2285         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2286         ir_node *node       = create_conv(dbgi, value_node, mode);
2287         node                = create_conv(dbgi, node, mode_arith);
2288
2289         return node;
2290 }
2291
2292 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2293 {
2294         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2295         type_t   *type = skip_typeref(expression->base.type);
2296
2297         const expression_t *value = expression->value;
2298
2299         switch(expression->base.kind) {
2300         case EXPR_UNARY_TAKE_ADDRESS:
2301                 return expression_to_addr(value);
2302
2303         case EXPR_UNARY_NEGATE: {
2304                 ir_node *value_node = expression_to_firm(value);
2305                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2306                 return new_d_Minus(dbgi, value_node, mode);
2307         }
2308         case EXPR_UNARY_PLUS:
2309                 return expression_to_firm(value);
2310         case EXPR_UNARY_BITWISE_NEGATE: {
2311                 ir_node *value_node = expression_to_firm(value);
2312                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2313                 return new_d_Not(dbgi, value_node, mode);
2314         }
2315         case EXPR_UNARY_NOT: {
2316                 ir_node *value_node = _expression_to_firm(value);
2317                 value_node          = create_conv(dbgi, value_node, mode_b);
2318                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2319                 return res;
2320         }
2321         case EXPR_UNARY_DEREFERENCE: {
2322                 ir_node *value_node = expression_to_firm(value);
2323                 type_t  *value_type = skip_typeref(value->base.type);
2324                 assert(is_type_pointer(value_type));
2325
2326                 /* check for __based */
2327                 const variable_t *const base_var = value_type->pointer.base_variable;
2328                 if (base_var != NULL) {
2329                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2330                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2331                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2332                 }
2333                 type_t  *points_to  = value_type->pointer.points_to;
2334                 return deref_address(dbgi, points_to, value_node);
2335         }
2336         case EXPR_UNARY_POSTFIX_INCREMENT:
2337         case EXPR_UNARY_POSTFIX_DECREMENT:
2338         case EXPR_UNARY_PREFIX_INCREMENT:
2339         case EXPR_UNARY_PREFIX_DECREMENT:
2340                 return create_incdec(expression);
2341         case EXPR_UNARY_CAST: {
2342                 ir_node *value_node = expression_to_firm(value);
2343                 type_t  *from_type  = value->base.type;
2344                 return create_cast(dbgi, value_node, from_type, type);
2345         }
2346         case EXPR_UNARY_ASSUME:
2347                 return handle_assume(dbgi, value);
2348
2349         default:
2350                 break;
2351         }
2352         panic("invalid UNEXPR type found");
2353 }
2354
2355 /**
2356  * produces a 0/1 depending of the value of a mode_b node
2357  */
2358 static ir_node *produce_condition_result(const expression_t *expression,
2359                                          ir_mode *mode, dbg_info *dbgi)
2360 {
2361         jump_target true_target;
2362         jump_target false_target;
2363         init_jump_target(&true_target,  NULL);
2364         init_jump_target(&false_target, NULL);
2365         create_condition_evaluation(expression, &true_target, &false_target);
2366
2367         ir_node    *val = NULL;
2368         jump_target exit_target;
2369         init_jump_target(&exit_target, NULL);
2370
2371         if (enter_jump_target(&true_target)) {
2372                 val = new_Const(get_mode_one(mode));
2373                 jump_to_target(&exit_target);
2374         }
2375
2376         if (enter_jump_target(&false_target)) {
2377                 ir_node *const zero = new_Const(get_mode_null(mode));
2378                 jump_to_target(&exit_target);
2379                 if (val) {
2380                         ir_node *const in[] = { val, zero };
2381                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2382                 } else {
2383                         val = zero;
2384                 }
2385         }
2386
2387         if (!enter_jump_target(&exit_target)) {
2388                 set_cur_block(new_Block(0, NULL));
2389                 val = new_Unknown(mode);
2390         }
2391         return val;
2392 }
2393
2394 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2395                 ir_node *value, type_t *type)
2396 {
2397         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2398         assert(is_type_pointer(type));
2399         pointer_type_t *const pointer_type = &type->pointer;
2400         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2401         ir_node        *      elem_size    = get_type_size_node(points_to);
2402         elem_size                          = create_conv(dbgi, elem_size, mode);
2403         value                              = create_conv(dbgi, value,     mode);
2404         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2405         return mul;
2406 }
2407
2408 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2409                           ir_node *left, ir_node *right)
2410 {
2411         ir_mode  *mode;
2412         type_t   *type_left  = skip_typeref(expression->left->base.type);
2413         type_t   *type_right = skip_typeref(expression->right->base.type);
2414
2415         expression_kind_t kind = expression->base.kind;
2416
2417         switch (kind) {
2418         case EXPR_BINARY_SHIFTLEFT:
2419         case EXPR_BINARY_SHIFTRIGHT:
2420         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2421         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2422                 mode  = get_ir_mode_arithmetic(expression->base.type);
2423                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2424                 break;
2425
2426         case EXPR_BINARY_SUB:
2427                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2428                         const pointer_type_t *const ptr_type = &type_left->pointer;
2429
2430                         mode = get_ir_mode_arithmetic(expression->base.type);
2431                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2432                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2433                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2434                         ir_node *const no_mem    = new_NoMem();
2435                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2436                                                                                                    mode, op_pin_state_floats);
2437                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2438                 }
2439                 /* fallthrough */
2440         case EXPR_BINARY_SUB_ASSIGN:
2441                 if (is_type_pointer(type_left)) {
2442                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2443                         mode  = get_ir_mode_arithmetic(type_left);
2444                         break;
2445                 }
2446                 goto normal_node;
2447
2448         case EXPR_BINARY_ADD:
2449         case EXPR_BINARY_ADD_ASSIGN:
2450                 if (is_type_pointer(type_left)) {
2451                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2452                         mode  = get_ir_mode_arithmetic(type_left);
2453                         break;
2454                 } else if (is_type_pointer(type_right)) {
2455                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2456                         mode  = get_ir_mode_arithmetic(type_right);
2457                         break;
2458                 }
2459                 goto normal_node;
2460
2461         default:
2462 normal_node:
2463                 mode = get_ir_mode_arithmetic(type_right);
2464                 left = create_conv(dbgi, left, mode);
2465                 break;
2466         }
2467
2468         switch (kind) {
2469         case EXPR_BINARY_ADD_ASSIGN:
2470         case EXPR_BINARY_ADD:
2471                 return new_d_Add(dbgi, left, right, mode);
2472         case EXPR_BINARY_SUB_ASSIGN:
2473         case EXPR_BINARY_SUB:
2474                 return new_d_Sub(dbgi, left, right, mode);
2475         case EXPR_BINARY_MUL_ASSIGN:
2476         case EXPR_BINARY_MUL:
2477                 return new_d_Mul(dbgi, left, right, mode);
2478         case EXPR_BINARY_BITWISE_AND:
2479         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2480                 return new_d_And(dbgi, left, right, mode);
2481         case EXPR_BINARY_BITWISE_OR:
2482         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2483                 return new_d_Or(dbgi, left, right, mode);
2484         case EXPR_BINARY_BITWISE_XOR:
2485         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2486                 return new_d_Eor(dbgi, left, right, mode);
2487         case EXPR_BINARY_SHIFTLEFT:
2488         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2489                 return new_d_Shl(dbgi, left, right, mode);
2490         case EXPR_BINARY_SHIFTRIGHT:
2491         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2492                 if (mode_is_signed(mode)) {
2493                         return new_d_Shrs(dbgi, left, right, mode);
2494                 } else {
2495                         return new_d_Shr(dbgi, left, right, mode);
2496                 }
2497         case EXPR_BINARY_DIV:
2498         case EXPR_BINARY_DIV_ASSIGN: {
2499                 ir_node *pin = new_Pin(new_NoMem());
2500                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2501                                          op_pin_state_floats);
2502                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2503                 return res;
2504         }
2505         case EXPR_BINARY_MOD:
2506         case EXPR_BINARY_MOD_ASSIGN: {
2507                 ir_node *pin = new_Pin(new_NoMem());
2508                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2509                                          op_pin_state_floats);
2510                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2511                 return res;
2512         }
2513         default:
2514                 panic("unexpected expression kind");
2515         }
2516 }
2517
2518 static ir_node *create_lazy_op(const binary_expression_t *expression)
2519 {
2520         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2521         type_t   *type = skip_typeref(expression->base.type);
2522         ir_mode  *mode = get_ir_mode_arithmetic(type);
2523
2524         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2525                 bool val = fold_constant_to_bool(expression->left);
2526                 expression_kind_t ekind = expression->base.kind;
2527                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2528                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2529                         if (!val) {
2530                                 return new_Const(get_mode_null(mode));
2531                         }
2532                 } else {
2533                         if (val) {
2534                                 return new_Const(get_mode_one(mode));
2535                         }
2536                 }
2537
2538                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2539                         bool valr = fold_constant_to_bool(expression->right);
2540                         return create_Const_from_bool(mode, valr);
2541                 }
2542
2543                 return produce_condition_result(expression->right, mode, dbgi);
2544         }
2545
2546         return produce_condition_result((const expression_t*) expression, mode,
2547                                         dbgi);
2548 }
2549
2550 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2551                                             ir_node *right, ir_mode *mode);
2552
2553 static ir_node *create_assign_binop(const binary_expression_t *expression)
2554 {
2555         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2556         const expression_t *left_expr = expression->left;
2557         type_t             *type      = skip_typeref(left_expr->base.type);
2558         ir_node            *right     = expression_to_firm(expression->right);
2559         ir_node            *left_addr = expression_to_addr(left_expr);
2560         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2561         ir_node            *result    = create_op(dbgi, expression, left, right);
2562
2563         result = create_cast(dbgi, result, expression->right->base.type, type);
2564
2565         result = set_value_for_expression_addr(left_expr, result, left_addr);
2566
2567         if (!is_type_compound(type)) {
2568                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2569                 result = create_conv(dbgi, result, mode_arithmetic);
2570         }
2571         return result;
2572 }
2573
2574 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2575 {
2576         expression_kind_t kind = expression->base.kind;
2577
2578         switch(kind) {
2579         case EXPR_BINARY_EQUAL:
2580         case EXPR_BINARY_NOTEQUAL:
2581         case EXPR_BINARY_LESS:
2582         case EXPR_BINARY_LESSEQUAL:
2583         case EXPR_BINARY_GREATER:
2584         case EXPR_BINARY_GREATEREQUAL:
2585         case EXPR_BINARY_ISGREATER:
2586         case EXPR_BINARY_ISGREATEREQUAL:
2587         case EXPR_BINARY_ISLESS:
2588         case EXPR_BINARY_ISLESSEQUAL:
2589         case EXPR_BINARY_ISLESSGREATER:
2590         case EXPR_BINARY_ISUNORDERED: {
2591                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2592                 ir_node    *left     = expression_to_firm(expression->left);
2593                 ir_node    *right    = expression_to_firm(expression->right);
2594                 ir_relation relation = get_relation(kind);
2595                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2596                 return cmp;
2597         }
2598         case EXPR_BINARY_ASSIGN: {
2599                 ir_node *addr  = expression_to_addr(expression->left);
2600                 ir_node *right = expression_to_firm(expression->right);
2601                 ir_node *res
2602                         = set_value_for_expression_addr(expression->left, right, addr);
2603
2604                 type_t  *type            = skip_typeref(expression->base.type);
2605                 if (!is_type_compound(type)) {
2606                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2607                         res                      = create_conv(NULL, res, mode_arithmetic);
2608                 }
2609                 return res;
2610         }
2611         case EXPR_BINARY_ADD:
2612         case EXPR_BINARY_SUB:
2613         case EXPR_BINARY_MUL:
2614         case EXPR_BINARY_DIV:
2615         case EXPR_BINARY_MOD:
2616         case EXPR_BINARY_BITWISE_AND:
2617         case EXPR_BINARY_BITWISE_OR:
2618         case EXPR_BINARY_BITWISE_XOR:
2619         case EXPR_BINARY_SHIFTLEFT:
2620         case EXPR_BINARY_SHIFTRIGHT:
2621         {
2622                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2623                 ir_node  *left  = expression_to_firm(expression->left);
2624                 ir_node  *right = expression_to_firm(expression->right);
2625                 return create_op(dbgi, expression, left, right);
2626         }
2627         case EXPR_BINARY_LOGICAL_AND:
2628         case EXPR_BINARY_LOGICAL_OR:
2629                 return create_lazy_op(expression);
2630         case EXPR_BINARY_COMMA:
2631                 /* create side effects of left side */
2632                 (void) expression_to_firm(expression->left);
2633                 return _expression_to_firm(expression->right);
2634
2635         case EXPR_BINARY_ADD_ASSIGN:
2636         case EXPR_BINARY_SUB_ASSIGN:
2637         case EXPR_BINARY_MUL_ASSIGN:
2638         case EXPR_BINARY_MOD_ASSIGN:
2639         case EXPR_BINARY_DIV_ASSIGN:
2640         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2641         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2642         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2643         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2644         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2645                 return create_assign_binop(expression);
2646         default:
2647                 panic("invalid binexpr type");
2648         }
2649 }
2650
2651 static ir_node *array_access_addr(const array_access_expression_t *expression)
2652 {
2653         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2654         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2655         ir_node  *offset      = expression_to_firm(expression->index);
2656         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2657         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2658         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2659
2660         return result;
2661 }
2662
2663 static ir_node *array_access_to_firm(
2664                 const array_access_expression_t *expression)
2665 {
2666         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2667         ir_node  *addr   = array_access_addr(expression);
2668         type_t   *type   = revert_automatic_type_conversion(
2669                         (const expression_t*) expression);
2670         type             = skip_typeref(type);
2671
2672         return deref_address(dbgi, type, addr);
2673 }
2674
2675 static long get_offsetof_offset(const offsetof_expression_t *expression)
2676 {
2677         type_t *orig_type = expression->type;
2678         long    offset    = 0;
2679
2680         designator_t *designator = expression->designator;
2681         for ( ; designator != NULL; designator = designator->next) {
2682                 type_t *type = skip_typeref(orig_type);
2683                 /* be sure the type is constructed */
2684                 (void) get_ir_type(type);
2685
2686                 if (designator->symbol != NULL) {
2687                         assert(is_type_compound(type));
2688                         symbol_t *symbol = designator->symbol;
2689
2690                         compound_t *compound = type->compound.compound;
2691                         entity_t   *iter     = compound->members.entities;
2692                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2693
2694                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2695                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2696                         offset += get_entity_offset(iter->compound_member.entity);
2697
2698                         orig_type = iter->declaration.type;
2699                 } else {
2700                         expression_t *array_index = designator->array_index;
2701                         assert(designator->array_index != NULL);
2702                         assert(is_type_array(type));
2703
2704                         long index         = fold_constant_to_int(array_index);
2705                         ir_type *arr_type  = get_ir_type(type);
2706                         ir_type *elem_type = get_array_element_type(arr_type);
2707                         long     elem_size = get_type_size_bytes(elem_type);
2708
2709                         offset += index * elem_size;
2710
2711                         orig_type = type->array.element_type;
2712                 }
2713         }
2714
2715         return offset;
2716 }
2717
2718 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2719 {
2720         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2721         long       offset = get_offsetof_offset(expression);
2722         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2723         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2724
2725         return new_d_Const(dbgi, tv);
2726 }
2727
2728 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2729                                      ir_entity *entity, type_t *type);
2730 static ir_initializer_t *create_ir_initializer(
2731                 const initializer_t *initializer, type_t *type);
2732
2733 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2734                                             initializer_t *initializer,
2735                                             type_t *type)
2736 {
2737         /* create the ir_initializer */
2738         PUSH_IRG(get_const_code_irg());
2739         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2740         POP_IRG();
2741
2742         ident     *const id          = id_unique("initializer.%u");
2743         ir_type   *const irtype      = get_ir_type(type);
2744         ir_type   *const global_type = get_glob_type();
2745         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2746         set_entity_ld_ident(entity, id);
2747         set_entity_visibility(entity, ir_visibility_private);
2748         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2749         set_entity_initializer(entity, irinitializer);
2750         return entity;
2751 }
2752
2753 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2754 {
2755         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2756         type_t        *type        = expression->type;
2757         initializer_t *initializer = expression->initializer;
2758
2759         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2760                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2761                 return create_symconst(dbgi, entity);
2762         } else {
2763                 /* create an entity on the stack */
2764                 ident   *const id     = id_unique("CompLit.%u");
2765                 ir_type *const irtype = get_ir_type(type);
2766                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2767
2768                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2769                 set_entity_ld_ident(entity, id);
2770
2771                 /* create initialisation code */
2772                 create_local_initializer(initializer, dbgi, entity, type);
2773
2774                 /* create a sel for the compound literal address */
2775                 ir_node *frame = get_irg_frame(current_ir_graph);
2776                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2777                 return sel;
2778         }
2779 }
2780
2781 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2782 {
2783         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2784         type_t   *const type = expr->type;
2785         ir_node  *const addr = compound_literal_addr(expr);
2786         return deref_address(dbgi, type, addr);
2787 }
2788
2789 /**
2790  * Transform a sizeof expression into Firm code.
2791  */
2792 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2793 {
2794         type_t *const type = skip_typeref(expression->type);
2795         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2796         if (is_type_array(type) && type->array.is_vla
2797                         && expression->tp_expression != NULL) {
2798                 expression_to_firm(expression->tp_expression);
2799         }
2800
2801         return get_type_size_node(type);
2802 }
2803
2804 static entity_t *get_expression_entity(const expression_t *expression)
2805 {
2806         if (expression->kind != EXPR_REFERENCE)
2807                 return NULL;
2808
2809         return expression->reference.entity;
2810 }
2811
2812 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2813 {
2814         switch(entity->kind) {
2815         case DECLARATION_KIND_CASES:
2816                 return entity->declaration.alignment;
2817         case ENTITY_STRUCT:
2818         case ENTITY_UNION:
2819                 return entity->compound.alignment;
2820         case ENTITY_TYPEDEF:
2821                 return entity->typedefe.alignment;
2822         default:
2823                 break;
2824         }
2825         return 0;
2826 }
2827
2828 /**
2829  * Transform an alignof expression into Firm code.
2830  */
2831 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2832 {
2833         unsigned alignment = 0;
2834
2835         const expression_t *tp_expression = expression->tp_expression;
2836         if (tp_expression != NULL) {
2837                 entity_t *entity = get_expression_entity(tp_expression);
2838                 if (entity != NULL) {
2839                         alignment = get_cparser_entity_alignment(entity);
2840                 }
2841         }
2842
2843         if (alignment == 0) {
2844                 type_t *type = expression->type;
2845                 alignment = get_type_alignment(type);
2846         }
2847
2848         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2849         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2850         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2851         return new_d_Const(dbgi, tv);
2852 }
2853
2854 static void init_ir_types(void);
2855
2856 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2857 {
2858         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2859
2860         bool constant_folding_old = constant_folding;
2861         constant_folding = true;
2862         int old_optimize         = get_optimize();
2863         int old_constant_folding = get_opt_constant_folding();
2864         set_optimize(1);
2865         set_opt_constant_folding(1);
2866
2867         init_ir_types();
2868
2869         PUSH_IRG(get_const_code_irg());
2870         ir_node *const cnst = _expression_to_firm(expression);
2871         POP_IRG();
2872
2873         set_optimize(old_optimize);
2874         set_opt_constant_folding(old_constant_folding);
2875
2876         if (!is_Const(cnst)) {
2877                 panic("couldn't fold constant");
2878         }
2879
2880         constant_folding = constant_folding_old;
2881
2882         ir_tarval *const tv   = get_Const_tarval(cnst);
2883         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2884         return tarval_convert_to(tv, mode);
2885 }
2886
2887 /* this function is only used in parser.c, but it relies on libfirm functionality */
2888 bool constant_is_negative(const expression_t *expression)
2889 {
2890         ir_tarval *tv = fold_constant_to_tarval(expression);
2891         return tarval_is_negative(tv);
2892 }
2893
2894 long fold_constant_to_int(const expression_t *expression)
2895 {
2896         ir_tarval *tv = fold_constant_to_tarval(expression);
2897         if (!tarval_is_long(tv)) {
2898                 panic("result of constant folding is not integer");
2899         }
2900
2901         return get_tarval_long(tv);
2902 }
2903
2904 bool fold_constant_to_bool(const expression_t *expression)
2905 {
2906         ir_tarval *tv = fold_constant_to_tarval(expression);
2907         return !tarval_is_null(tv);
2908 }
2909
2910 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2911 {
2912         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2913
2914         /* first try to fold a constant condition */
2915         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2916                 bool val = fold_constant_to_bool(expression->condition);
2917                 if (val) {
2918                         expression_t *true_expression = expression->true_expression;
2919                         if (true_expression == NULL)
2920                                 true_expression = expression->condition;
2921                         return expression_to_firm(true_expression);
2922                 } else {
2923                         return expression_to_firm(expression->false_expression);
2924                 }
2925         }
2926
2927         jump_target true_target;
2928         jump_target false_target;
2929         init_jump_target(&true_target,  NULL);
2930         init_jump_target(&false_target, NULL);
2931         ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2932
2933         ir_node    *val = NULL;
2934         jump_target exit_target;
2935         init_jump_target(&exit_target, NULL);
2936
2937         if (enter_jump_target(&true_target)) {
2938                 if (expression->true_expression) {
2939                         val = expression_to_firm(expression->true_expression);
2940                 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2941                         val = cond_expr;
2942                 } else {
2943                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2944                          * comparison.  Generate a "1" as value for the true branch. */
2945                         val = new_Const(get_mode_one(mode_Is));
2946                 }
2947                 jump_to_target(&exit_target);
2948         }
2949
2950         if (enter_jump_target(&false_target)) {
2951                 ir_node *const false_val = expression_to_firm(expression->false_expression);
2952                 jump_to_target(&exit_target);
2953                 if (val) {
2954                         ir_node *const in[] = { val, false_val };
2955                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2956                 } else {
2957                         val = false_val;
2958                 }
2959         }
2960
2961         if (!enter_jump_target(&exit_target)) {
2962                 set_cur_block(new_Block(0, NULL));
2963                 type_t *const type = skip_typeref(expression->base.type);
2964                 if (!is_type_void(type))
2965                         val = new_Unknown(get_ir_mode_arithmetic(type));
2966         }
2967         return val;
2968 }
2969
2970 /**
2971  * Returns an IR-node representing the address of a field.
2972  */
2973 static ir_node *select_addr(const select_expression_t *expression)
2974 {
2975         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2976
2977         construct_select_compound(expression);
2978
2979         ir_node *compound_addr = expression_to_firm(expression->compound);
2980
2981         entity_t *entry = expression->compound_entry;
2982         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2983         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2984
2985         if (constant_folding) {
2986                 ir_mode *mode      = get_irn_mode(compound_addr);
2987                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2988                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2989                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2990         } else {
2991                 ir_entity *irentity = entry->compound_member.entity;
2992                 assert(irentity != NULL);
2993                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2994         }
2995 }
2996
2997 static ir_node *select_to_firm(const select_expression_t *expression)
2998 {
2999         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3000         ir_node  *addr = select_addr(expression);
3001         type_t   *type = revert_automatic_type_conversion(
3002                         (const expression_t*) expression);
3003         type           = skip_typeref(type);
3004
3005         entity_t *entry = expression->compound_entry;
3006         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3007
3008         if (entry->compound_member.bitfield) {
3009                 return bitfield_extract_to_firm(expression, addr);
3010         }
3011
3012         return deref_address(dbgi, type, addr);
3013 }
3014
3015 /* Values returned by __builtin_classify_type. */
3016 typedef enum gcc_type_class
3017 {
3018         no_type_class = -1,
3019         void_type_class,
3020         integer_type_class,
3021         char_type_class,
3022         enumeral_type_class,
3023         boolean_type_class,
3024         pointer_type_class,
3025         reference_type_class,
3026         offset_type_class,
3027         real_type_class,
3028         complex_type_class,
3029         function_type_class,
3030         method_type_class,
3031         record_type_class,
3032         union_type_class,
3033         array_type_class,
3034         string_type_class,
3035         set_type_class,
3036         file_type_class,
3037         lang_type_class
3038 } gcc_type_class;
3039
3040 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3041 {
3042         type_t *type = expr->type_expression->base.type;
3043
3044         /* FIXME gcc returns different values depending on whether compiling C or C++
3045          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3046         gcc_type_class tc;
3047         for (;;) {
3048                 type = skip_typeref(type);
3049                 switch (type->kind) {
3050                         case TYPE_ATOMIC: {
3051                                 const atomic_type_t *const atomic_type = &type->atomic;
3052                                 switch (atomic_type->akind) {
3053                                         /* gcc cannot do that */
3054                                         case ATOMIC_TYPE_VOID:
3055                                                 tc = void_type_class;
3056                                                 goto make_const;
3057
3058                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3059                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3060                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3061                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3062                                         case ATOMIC_TYPE_SHORT:
3063                                         case ATOMIC_TYPE_USHORT:
3064                                         case ATOMIC_TYPE_INT:
3065                                         case ATOMIC_TYPE_UINT:
3066                                         case ATOMIC_TYPE_LONG:
3067                                         case ATOMIC_TYPE_ULONG:
3068                                         case ATOMIC_TYPE_LONGLONG:
3069                                         case ATOMIC_TYPE_ULONGLONG:
3070                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3071                                                 tc = integer_type_class;
3072                                                 goto make_const;
3073
3074                                         case ATOMIC_TYPE_FLOAT:
3075                                         case ATOMIC_TYPE_DOUBLE:
3076                                         case ATOMIC_TYPE_LONG_DOUBLE:
3077                                                 tc = real_type_class;
3078                                                 goto make_const;
3079                                 }
3080                                 panic("Unexpected atomic type in classify_type_to_firm().");
3081                         }
3082
3083                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3084                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3085                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3086                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3087                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3088                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3089                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3090
3091                         /* gcc handles this as integer */
3092                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3093
3094                         /* gcc classifies the referenced type */
3095                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3096
3097                         /* typedef/typeof should be skipped already */
3098                         case TYPE_TYPEDEF:
3099                         case TYPE_TYPEOF:
3100                         case TYPE_ERROR:
3101                                 break;
3102                 }
3103                 panic("unexpected TYPE classify_type_to_firm().");
3104         }
3105
3106 make_const:;
3107         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3108         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3109         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3110         return new_d_Const(dbgi, tv);
3111 }
3112
3113 static ir_node *function_name_to_firm(
3114                 const funcname_expression_t *const expr)
3115 {
3116         switch(expr->kind) {
3117         case FUNCNAME_FUNCTION:
3118         case FUNCNAME_PRETTY_FUNCTION:
3119         case FUNCNAME_FUNCDNAME:
3120                 if (current_function_name == NULL) {
3121                         source_position_t const *const src_pos = &expr->base.source_position;
3122                         char              const *const name    = current_function_entity->base.symbol->string;
3123                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3124                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3125                 }
3126                 return current_function_name;
3127         case FUNCNAME_FUNCSIG:
3128                 if (current_funcsig == NULL) {
3129                         source_position_t const *const src_pos = &expr->base.source_position;
3130                         ir_entity               *const ent     = get_irg_entity(current_ir_graph);
3131                         char              const *const name    = get_entity_ld_name(ent);
3132                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3133                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3134                 }
3135                 return current_funcsig;
3136         }
3137         panic("Unsupported function name");
3138 }
3139
3140 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3141 {
3142         statement_t *statement = expr->statement;
3143
3144         assert(statement->kind == STATEMENT_COMPOUND);
3145         return compound_statement_to_firm(&statement->compound);
3146 }
3147
3148 static ir_node *va_start_expression_to_firm(
3149         const va_start_expression_t *const expr)
3150 {
3151         ir_entity *param_ent = current_vararg_entity;
3152         if (param_ent == NULL) {
3153                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3154                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3155                 ir_type *const param_type  = get_unknown_type();
3156                 param_ent = new_parameter_entity(frame_type, n, param_type);
3157                 current_vararg_entity = param_ent;
3158         }
3159
3160         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3161         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3162         ir_node  *const no_mem  = new_NoMem();
3163         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3164
3165         set_value_for_expression(expr->ap, arg_sel);
3166
3167         return NULL;
3168 }
3169
3170 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3171 {
3172         type_t       *const type    = expr->base.type;
3173         expression_t *const ap_expr = expr->ap;
3174         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3175         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3176         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3177         ir_node      *const res     = deref_address(dbgi, type, ap);
3178
3179         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3180         ir_mode      *const mode    = get_irn_mode(cnst);
3181         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3182         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3183         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3184         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3185         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3186
3187         set_value_for_expression_addr(ap_expr, add, ap_addr);
3188
3189         return res;
3190 }
3191
3192 /**
3193  * Generate Firm for a va_copy expression.
3194  */
3195 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3196 {
3197         ir_node *const src = expression_to_firm(expr->src);
3198         set_value_for_expression(expr->dst, src);
3199         return NULL;
3200 }
3201
3202 static ir_node *dereference_addr(const unary_expression_t *const expression)
3203 {
3204         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3205         return expression_to_firm(expression->value);
3206 }
3207
3208 /**
3209  * Returns a IR-node representing an lvalue of the given expression.
3210  */
3211 static ir_node *expression_to_addr(const expression_t *expression)
3212 {
3213         switch(expression->kind) {
3214         case EXPR_ARRAY_ACCESS:
3215                 return array_access_addr(&expression->array_access);
3216         case EXPR_CALL:
3217                 return call_expression_to_firm(&expression->call);
3218         case EXPR_COMPOUND_LITERAL:
3219                 return compound_literal_addr(&expression->compound_literal);
3220         case EXPR_REFERENCE:
3221                 return reference_addr(&expression->reference);
3222         case EXPR_SELECT:
3223                 return select_addr(&expression->select);
3224         case EXPR_UNARY_DEREFERENCE:
3225                 return dereference_addr(&expression->unary);
3226         default:
3227                 break;
3228         }
3229         panic("trying to get address of non-lvalue");
3230 }
3231
3232 static ir_node *builtin_constant_to_firm(
3233                 const builtin_constant_expression_t *expression)
3234 {
3235         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3236         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3237         return create_Const_from_bool(mode, v);
3238 }
3239
3240 static ir_node *builtin_types_compatible_to_firm(
3241                 const builtin_types_compatible_expression_t *expression)
3242 {
3243         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3244         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3245         bool     const value = types_compatible(left, right);
3246         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3247         return create_Const_from_bool(mode, value);
3248 }
3249
3250 static ir_node *get_label_block(label_t *label)
3251 {
3252         if (label->block != NULL)
3253                 return label->block;
3254
3255         ir_node *block = new_immBlock();
3256         label->block = block;
3257         if (label->address_taken)
3258                 ARR_APP1(ir_node*, ijmp_blocks, block);
3259         return block;
3260 }
3261
3262 /**
3263  * Pointer to a label.  This is used for the
3264  * GNU address-of-label extension.
3265  */
3266 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3267 {
3268         /* Beware: Might be called from create initializer with current_ir_graph
3269          * set to const_code_irg. */
3270         PUSH_IRG(current_function);
3271         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3272         ir_node   *block  = get_label_block(label->label);
3273         ir_entity *entity = create_Block_entity(block);
3274         POP_IRG();
3275
3276         symconst_symbol value;
3277         value.entity_p = entity;
3278         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3279 }
3280
3281 /**
3282  * creates firm nodes for an expression. The difference between this function
3283  * and expression_to_firm is, that this version might produce mode_b nodes
3284  * instead of mode_Is.
3285  */
3286 static ir_node *_expression_to_firm(expression_t const *const expr)
3287 {
3288 #ifndef NDEBUG
3289         if (!constant_folding) {
3290                 assert(!expr->base.transformed);
3291                 ((expression_t*)expr)->base.transformed = true;
3292         }
3293 #endif
3294
3295         switch (expr->kind) {
3296         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3297         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3298         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3299         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3300         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3301         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3302         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3303         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3304         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3305         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3306         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3307         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3308         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3309         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3310         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3311         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3312         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3313         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3314         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3315         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3316         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3317         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3318         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3319
3320         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3321
3322         case EXPR_ERROR: break;
3323         }
3324         panic("invalid expression found");
3325 }
3326
3327 /**
3328  * Check if a given expression is a GNU __builtin_expect() call.
3329  */
3330 static bool is_builtin_expect(const expression_t *expression)
3331 {
3332         if (expression->kind != EXPR_CALL)
3333                 return false;
3334
3335         expression_t *function = expression->call.function;
3336         if (function->kind != EXPR_REFERENCE)
3337                 return false;
3338         reference_expression_t *ref = &function->reference;
3339         if (ref->entity->kind         != ENTITY_FUNCTION ||
3340             ref->entity->function.btk != BUILTIN_EXPECT)
3341                 return false;
3342
3343         return true;
3344 }
3345
3346 static bool produces_mode_b(const expression_t *expression)
3347 {
3348         switch (expression->kind) {
3349         case EXPR_BINARY_EQUAL:
3350         case EXPR_BINARY_NOTEQUAL:
3351         case EXPR_BINARY_LESS:
3352         case EXPR_BINARY_LESSEQUAL:
3353         case EXPR_BINARY_GREATER:
3354         case EXPR_BINARY_GREATEREQUAL:
3355         case EXPR_BINARY_ISGREATER:
3356         case EXPR_BINARY_ISGREATEREQUAL:
3357         case EXPR_BINARY_ISLESS:
3358         case EXPR_BINARY_ISLESSEQUAL:
3359         case EXPR_BINARY_ISLESSGREATER:
3360         case EXPR_BINARY_ISUNORDERED:
3361         case EXPR_UNARY_NOT:
3362                 return true;
3363
3364         case EXPR_CALL:
3365                 if (is_builtin_expect(expression)) {
3366                         expression_t *argument = expression->call.arguments->expression;
3367                         return produces_mode_b(argument);
3368                 }
3369                 return false;
3370         case EXPR_BINARY_COMMA:
3371                 return produces_mode_b(expression->binary.right);
3372
3373         default:
3374                 return false;
3375         }
3376 }
3377
3378 static ir_node *expression_to_firm(const expression_t *expression)
3379 {
3380         if (!produces_mode_b(expression)) {
3381                 ir_node *res = _expression_to_firm(expression);
3382                 assert(res == NULL || get_irn_mode(res) != mode_b);
3383                 return res;
3384         }
3385
3386         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3387                 return new_Const(fold_constant_to_tarval(expression));
3388         }
3389
3390         /* we have to produce a 0/1 from the mode_b expression */
3391         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3392         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3393         return produce_condition_result(expression, mode, dbgi);
3394 }
3395
3396 /**
3397  * create a short-circuit expression evaluation that tries to construct
3398  * efficient control flow structures for &&, || and ! expressions
3399  */
3400 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3401 {
3402         switch(expression->kind) {
3403         case EXPR_UNARY_NOT: {
3404                 const unary_expression_t *unary_expression = &expression->unary;
3405                 create_condition_evaluation(unary_expression->value, false_target, true_target);
3406                 return NULL;
3407         }
3408         case EXPR_BINARY_LOGICAL_AND: {
3409                 jump_target extra_target;
3410                 init_jump_target(&extra_target, NULL);
3411                 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3412                 if (enter_jump_target(&extra_target))
3413                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3414                 return NULL;
3415         }
3416         case EXPR_BINARY_LOGICAL_OR: {
3417                 jump_target extra_target;
3418                 init_jump_target(&extra_target, NULL);
3419                 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3420                 if (enter_jump_target(&extra_target))
3421                         create_condition_evaluation(expression->binary.right, true_target, false_target);
3422                 return NULL;
3423         }
3424         default:
3425                 break;
3426         }
3427
3428         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3429         ir_node  *cond_expr  = _expression_to_firm(expression);
3430         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3431         ir_node  *cond       = new_d_Cond(dbgi, condition);
3432         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3433         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3434
3435         /* set branch prediction info based on __builtin_expect */
3436         if (is_builtin_expect(expression) && is_Cond(cond)) {
3437                 call_argument_t *argument = expression->call.arguments->next;
3438                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3439                         bool               const cnst = fold_constant_to_bool(argument->expression);
3440                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3441                         set_Cond_jmp_pred(cond, pred);
3442                 }
3443         }
3444
3445         add_pred_to_jump_target(true_target,  true_proj);
3446         add_pred_to_jump_target(false_target, false_proj);
3447
3448         set_unreachable_now();
3449         return cond_expr;
3450 }
3451
3452 static void create_variable_entity(entity_t *variable,
3453                                    declaration_kind_t declaration_kind,
3454                                    ir_type *parent_type)
3455 {
3456         assert(variable->kind == ENTITY_VARIABLE);
3457         type_t    *type = skip_typeref(variable->declaration.type);
3458
3459         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3460         ir_type   *const irtype    = get_ir_type(type);
3461         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3462         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3463         unsigned         alignment = variable->declaration.alignment;
3464
3465         set_entity_alignment(irentity, alignment);
3466
3467         handle_decl_modifiers(irentity, variable);
3468
3469         variable->declaration.kind  = (unsigned char) declaration_kind;
3470         variable->variable.v.entity = irentity;
3471         set_entity_ld_ident(irentity, create_ld_ident(variable));
3472
3473         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3474                 set_entity_volatility(irentity, volatility_is_volatile);
3475         }
3476 }
3477
3478
3479 typedef struct type_path_entry_t type_path_entry_t;
3480 struct type_path_entry_t {
3481         type_t           *type;
3482         ir_initializer_t *initializer;
3483         size_t            index;
3484         entity_t         *compound_entry;
3485 };
3486
3487 typedef struct type_path_t type_path_t;
3488 struct type_path_t {
3489         type_path_entry_t *path;
3490         type_t            *top_type;
3491         bool               invalid;
3492 };
3493
3494 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3495 {
3496         size_t len = ARR_LEN(path->path);
3497
3498         for (size_t i = 0; i < len; ++i) {
3499                 const type_path_entry_t *entry = & path->path[i];
3500
3501                 type_t *type = skip_typeref(entry->type);
3502                 if (is_type_compound(type)) {
3503                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3504                 } else if (is_type_array(type)) {
3505                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3506                 } else {
3507                         fprintf(stderr, "-INVALID-");
3508                 }
3509         }
3510         fprintf(stderr, "  (");
3511         print_type(path->top_type);
3512         fprintf(stderr, ")");
3513 }
3514
3515 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3516 {
3517         size_t len = ARR_LEN(path->path);
3518         assert(len > 0);
3519         return & path->path[len-1];
3520 }
3521
3522 static type_path_entry_t *append_to_type_path(type_path_t *path)
3523 {
3524         size_t len = ARR_LEN(path->path);
3525         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3526
3527         type_path_entry_t *result = & path->path[len];
3528         memset(result, 0, sizeof(result[0]));
3529         return result;
3530 }
3531
3532 static size_t get_compound_member_count(const compound_type_t *type)
3533 {
3534         compound_t *compound  = type->compound;
3535         size_t      n_members = 0;
3536         entity_t   *member    = compound->members.entities;
3537         for ( ; member != NULL; member = member->base.next) {
3538                 ++n_members;
3539         }
3540
3541         return n_members;
3542 }
3543
3544 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3545 {
3546         type_t *orig_top_type = path->top_type;
3547         type_t *top_type      = skip_typeref(orig_top_type);
3548
3549         assert(is_type_compound(top_type) || is_type_array(top_type));
3550
3551         if (ARR_LEN(path->path) == 0) {
3552                 return NULL;
3553         } else {
3554                 type_path_entry_t *top         = get_type_path_top(path);
3555                 ir_initializer_t  *initializer = top->initializer;
3556                 return get_initializer_compound_value(initializer, top->index);
3557         }
3558 }
3559
3560 static void descend_into_subtype(type_path_t *path)
3561 {
3562         type_t *orig_top_type = path->top_type;
3563         type_t *top_type      = skip_typeref(orig_top_type);
3564
3565         assert(is_type_compound(top_type) || is_type_array(top_type));
3566
3567         ir_initializer_t *initializer = get_initializer_entry(path);
3568
3569         type_path_entry_t *top = append_to_type_path(path);
3570         top->type              = top_type;
3571
3572         size_t len;
3573
3574         if (is_type_compound(top_type)) {
3575                 compound_t *const compound = top_type->compound.compound;
3576                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3577
3578                 top->compound_entry = entry;
3579                 top->index          = 0;
3580                 len                 = get_compound_member_count(&top_type->compound);
3581                 if (entry != NULL) {
3582                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3583                         path->top_type = entry->declaration.type;
3584                 }
3585         } else {
3586                 assert(is_type_array(top_type));
3587                 assert(top_type->array.size > 0);
3588
3589                 top->index     = 0;
3590                 path->top_type = top_type->array.element_type;
3591                 len            = top_type->array.size;
3592         }
3593         if (initializer == NULL
3594                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3595                 initializer = create_initializer_compound(len);
3596                 /* we have to set the entry at the 2nd latest path entry... */
3597                 size_t path_len = ARR_LEN(path->path);
3598                 assert(path_len >= 1);
3599                 if (path_len > 1) {
3600                         type_path_entry_t *entry        = & path->path[path_len-2];
3601                         ir_initializer_t  *tinitializer = entry->initializer;
3602                         set_initializer_compound_value(tinitializer, entry->index,
3603                                                        initializer);
3604                 }
3605         }
3606         top->initializer = initializer;
3607 }
3608
3609 static void ascend_from_subtype(type_path_t *path)
3610 {
3611         type_path_entry_t *top = get_type_path_top(path);
3612
3613         path->top_type = top->type;
3614
3615         size_t len = ARR_LEN(path->path);
3616         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3617 }
3618
3619 static void walk_designator(type_path_t *path, const designator_t *designator)
3620 {
3621         /* designators start at current object type */
3622         ARR_RESIZE(type_path_entry_t, path->path, 1);
3623
3624         for ( ; designator != NULL; designator = designator->next) {
3625                 type_path_entry_t *top         = get_type_path_top(path);
3626                 type_t            *orig_type   = top->type;
3627                 type_t            *type        = skip_typeref(orig_type);
3628
3629                 if (designator->symbol != NULL) {
3630                         assert(is_type_compound(type));
3631                         size_t    index  = 0;
3632                         symbol_t *symbol = designator->symbol;
3633
3634                         compound_t *compound = type->compound.compound;
3635                         entity_t   *iter     = compound->members.entities;
3636                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3637                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3638
3639                         /* revert previous initialisations of other union elements */
3640                         if (type->kind == TYPE_COMPOUND_UNION) {
3641                                 ir_initializer_t *initializer = top->initializer;
3642                                 if (initializer != NULL
3643                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3644                                         /* are we writing to a new element? */
3645                                         ir_initializer_t *oldi
3646                                                 = get_initializer_compound_value(initializer, index);
3647                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3648                                                 /* clear initializer */
3649                                                 size_t len
3650                                                         = get_initializer_compound_n_entries(initializer);
3651                                                 ir_initializer_t *nulli = get_initializer_null();
3652                                                 for (size_t i = 0; i < len; ++i) {
3653                                                         set_initializer_compound_value(initializer, i,
3654                                                                                        nulli);
3655                                                 }
3656                                         }
3657                                 }
3658                         }
3659
3660                         top->type           = orig_type;
3661                         top->compound_entry = iter;
3662                         top->index          = index;
3663                         orig_type           = iter->declaration.type;
3664                 } else {
3665                         expression_t *array_index = designator->array_index;
3666                         assert(is_type_array(type));
3667
3668                         long index = fold_constant_to_int(array_index);
3669                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3670
3671                         top->type  = orig_type;
3672                         top->index = (size_t) index;
3673                         orig_type  = type->array.element_type;
3674                 }
3675                 path->top_type = orig_type;
3676
3677                 if (designator->next != NULL) {
3678                         descend_into_subtype(path);
3679                 }
3680         }
3681
3682         path->invalid  = false;
3683 }
3684
3685 static void advance_current_object(type_path_t *path)
3686 {
3687         if (path->invalid) {
3688                 /* TODO: handle this... */
3689                 panic("invalid initializer in ast2firm (excessive elements)");
3690         }
3691
3692         type_path_entry_t *top = get_type_path_top(path);
3693
3694         type_t *type = skip_typeref(top->type);
3695         if (is_type_union(type)) {
3696                 /* only the first element is initialized in unions */
3697                 top->compound_entry = NULL;
3698         } else if (is_type_struct(type)) {
3699                 entity_t *entry = top->compound_entry;
3700
3701                 top->index++;
3702                 entry               = skip_unnamed_bitfields(entry->base.next);
3703                 top->compound_entry = entry;
3704                 if (entry != NULL) {
3705                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3706                         path->top_type = entry->declaration.type;
3707                         return;
3708                 }
3709         } else {
3710                 assert(is_type_array(type));
3711
3712                 top->index++;
3713                 if (!type->array.size_constant || top->index < type->array.size) {
3714                         return;
3715                 }
3716         }
3717
3718         /* we're past the last member of the current sub-aggregate, try if we
3719          * can ascend in the type hierarchy and continue with another subobject */
3720         size_t len = ARR_LEN(path->path);
3721
3722         if (len > 1) {
3723                 ascend_from_subtype(path);
3724                 advance_current_object(path);
3725         } else {
3726                 path->invalid = true;
3727         }
3728 }
3729
3730
3731 static ir_initializer_t *create_ir_initializer_value(
3732                 const initializer_value_t *initializer)
3733 {
3734         if (is_type_compound(initializer->value->base.type)) {
3735                 panic("initializer creation for compounds not implemented yet");
3736         }
3737         type_t       *type = initializer->value->base.type;
3738         expression_t *expr = initializer->value;
3739         ir_node *value = expression_to_firm(expr);
3740         ir_mode *mode  = get_ir_mode_storage(type);
3741         value          = create_conv(NULL, value, mode);
3742         return create_initializer_const(value);
3743 }
3744
3745 /** test wether type can be initialized by a string constant */
3746 static bool is_string_type(type_t *type)
3747 {
3748         if (!is_type_array(type))
3749                 return false;
3750
3751         type_t *const inner = skip_typeref(type->array.element_type);
3752         return is_type_integer(inner);
3753 }
3754
3755 static ir_initializer_t *create_ir_initializer_list(
3756                 const initializer_list_t *initializer, type_t *type)
3757 {
3758         type_path_t path;
3759         memset(&path, 0, sizeof(path));
3760         path.top_type = type;
3761         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3762
3763         descend_into_subtype(&path);
3764
3765         for (size_t i = 0; i < initializer->len; ++i) {
3766                 const initializer_t *sub_initializer = initializer->initializers[i];
3767
3768                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3769                         walk_designator(&path, sub_initializer->designator.designator);
3770                         continue;
3771                 }
3772
3773                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3774                         /* we might have to descend into types until we're at a scalar
3775                          * type */
3776                         while(true) {
3777                                 type_t *orig_top_type = path.top_type;
3778                                 type_t *top_type      = skip_typeref(orig_top_type);
3779
3780                                 if (is_type_scalar(top_type))
3781                                         break;
3782                                 descend_into_subtype(&path);
3783                         }
3784                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3785                         /* we might have to descend into types until we're at a scalar
3786                          * type */
3787                         while (true) {
3788                                 type_t *orig_top_type = path.top_type;
3789                                 type_t *top_type      = skip_typeref(orig_top_type);
3790
3791                                 if (is_string_type(top_type))
3792                                         break;
3793                                 descend_into_subtype(&path);
3794                         }
3795                 }
3796
3797                 ir_initializer_t *sub_irinitializer
3798                         = create_ir_initializer(sub_initializer, path.top_type);
3799
3800                 size_t path_len = ARR_LEN(path.path);
3801                 assert(path_len >= 1);
3802                 type_path_entry_t *entry        = & path.path[path_len-1];
3803                 ir_initializer_t  *tinitializer = entry->initializer;
3804                 set_initializer_compound_value(tinitializer, entry->index,
3805                                                sub_irinitializer);
3806
3807                 advance_current_object(&path);
3808         }
3809
3810         assert(ARR_LEN(path.path) >= 1);
3811         ir_initializer_t *result = path.path[0].initializer;
3812         DEL_ARR_F(path.path);
3813
3814         return result;
3815 }
3816
3817 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3818 {
3819         type = skip_typeref(type);
3820
3821         assert(type->kind == TYPE_ARRAY);
3822         assert(type->array.size_constant);
3823         string_literal_expression_t const *const str = get_init_string(init);
3824         size_t            const str_len = str->value.size;
3825         size_t            const arr_len = type->array.size;
3826         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
3827         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
3828         char const       *      p       = str->value.begin;
3829         switch (str->value.encoding) {
3830         case STRING_ENCODING_CHAR:
3831                 for (size_t i = 0; i != arr_len; ++i) {
3832                         char              const c      = i < str_len ? *p++ : 0;
3833                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3834                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3835                         set_initializer_compound_value(irinit, i, tvinit);
3836                 }
3837                 break;
3838
3839         case STRING_ENCODING_WIDE:
3840                 for (size_t i = 0; i != arr_len; ++i) {
3841                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
3842                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3843                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3844                         set_initializer_compound_value(irinit, i, tvinit);
3845                 }
3846                 break;
3847         }
3848
3849         return irinit;
3850 }
3851
3852 static ir_initializer_t *create_ir_initializer(
3853                 const initializer_t *initializer, type_t *type)
3854 {
3855         switch(initializer->kind) {
3856                 case INITIALIZER_STRING:
3857                         return create_ir_initializer_string(initializer, type);
3858
3859                 case INITIALIZER_LIST:
3860                         return create_ir_initializer_list(&initializer->list, type);
3861
3862                 case INITIALIZER_VALUE:
3863                         return create_ir_initializer_value(&initializer->value);
3864
3865                 case INITIALIZER_DESIGNATOR:
3866                         panic("unexpected designator initializer found");
3867         }
3868         panic("unknown initializer");
3869 }
3870
3871 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
3872  *  are elements [...] the remainder of the aggregate shall be initialized
3873  *  implicitly the same as objects that have static storage duration. */
3874 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3875                 ir_node *base_addr)
3876 {
3877         /* for unions we must NOT do anything for null initializers */
3878         ir_type *owner = get_entity_owner(entity);
3879         if (is_Union_type(owner)) {
3880                 return;
3881         }
3882
3883         ir_type *ent_type = get_entity_type(entity);
3884         /* create sub-initializers for a compound type */
3885         if (is_compound_type(ent_type)) {
3886                 unsigned n_members = get_compound_n_members(ent_type);
3887                 for (unsigned n = 0; n < n_members; ++n) {
3888                         ir_entity *member = get_compound_member(ent_type, n);
3889                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3890                                                                 member);
3891                         create_dynamic_null_initializer(member, dbgi, addr);
3892                 }
3893                 return;
3894         }
3895         if (is_Array_type(ent_type)) {
3896                 assert(has_array_upper_bound(ent_type, 0));
3897                 long n = get_array_upper_bound_int(ent_type, 0);
3898                 for (long i = 0; i < n; ++i) {
3899                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3900                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3901                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3902                         ir_node   *in[1]    = { cnst };
3903                         ir_entity *arrent   = get_array_element_entity(ent_type);
3904                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3905                                                         arrent);
3906                         create_dynamic_null_initializer(arrent, dbgi, addr);
3907                 }
3908                 return;
3909         }
3910
3911         ir_mode *value_mode = get_type_mode(ent_type);
3912         ir_node *node       = new_Const(get_mode_null(value_mode));
3913
3914         /* is it a bitfield type? */
3915         if (is_Primitive_type(ent_type) &&
3916                         get_primitive_base_type(ent_type) != NULL) {
3917                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3918                 return;
3919         }
3920
3921         ir_node *mem    = get_store();
3922         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3923         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3924         set_store(proj_m);
3925 }
3926
3927 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3928                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3929 {
3930         switch(get_initializer_kind(initializer)) {
3931         case IR_INITIALIZER_NULL:
3932                 create_dynamic_null_initializer(entity, dbgi, base_addr);
3933                 return;
3934         case IR_INITIALIZER_CONST: {
3935                 ir_node *node     = get_initializer_const_value(initializer);
3936                 ir_type *ent_type = get_entity_type(entity);
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                 assert(get_type_mode(type) == get_irn_mode(node));
3946                 ir_node *mem    = get_store();
3947                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3948                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3949                 set_store(proj_m);
3950                 return;
3951         }
3952         case IR_INITIALIZER_TARVAL: {
3953                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
3954                 ir_node   *cnst     = new_d_Const(dbgi, tv);
3955                 ir_type   *ent_type = get_entity_type(entity);
3956
3957                 /* is it a bitfield type? */
3958                 if (is_Primitive_type(ent_type) &&
3959                                 get_primitive_base_type(ent_type) != NULL) {
3960                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3961                         return;
3962                 }
3963
3964                 assert(get_type_mode(type) == get_tarval_mode(tv));
3965                 ir_node *mem    = get_store();
3966                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3967                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3968                 set_store(proj_m);
3969                 return;
3970         }
3971         case IR_INITIALIZER_COMPOUND: {
3972                 assert(is_compound_type(type) || is_Array_type(type));
3973                 int n_members;
3974                 if (is_Array_type(type)) {
3975                         assert(has_array_upper_bound(type, 0));
3976                         n_members = get_array_upper_bound_int(type, 0);
3977                 } else {
3978                         n_members = get_compound_n_members(type);
3979                 }
3980
3981                 if (get_initializer_compound_n_entries(initializer)
3982                                 != (unsigned) n_members)
3983                         panic("initializer doesn't match compound type");
3984
3985                 for (int i = 0; i < n_members; ++i) {
3986                         ir_node   *addr;
3987                         ir_type   *irtype;
3988                         ir_entity *sub_entity;
3989                         if (is_Array_type(type)) {
3990                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3991                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3992                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3993                                 ir_node   *in[1]    = { cnst };
3994                                 irtype     = get_array_element_type(type);
3995                                 sub_entity = get_array_element_entity(type);
3996                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3997                                                        sub_entity);
3998                         } else {
3999                                 sub_entity = get_compound_member(type, i);
4000                                 irtype     = get_entity_type(sub_entity);
4001                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4002                                                              sub_entity);
4003                         }
4004
4005                         ir_initializer_t *sub_init
4006                                 = get_initializer_compound_value(initializer, i);
4007
4008                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4009                                                        addr);
4010                 }
4011                 return;
4012         }
4013         }
4014
4015         panic("invalid IR_INITIALIZER found");
4016 }
4017
4018 static void create_dynamic_initializer(ir_initializer_t *initializer,
4019                 dbg_info *dbgi, ir_entity *entity)
4020 {
4021         ir_node *frame     = get_irg_frame(current_ir_graph);
4022         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4023         ir_type *type      = get_entity_type(entity);
4024
4025         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4026 }
4027
4028 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4029                                      ir_entity *entity, type_t *type)
4030 {
4031         ir_node *memory = get_store();
4032         ir_node *nomem  = new_NoMem();
4033         ir_node *frame  = get_irg_frame(current_ir_graph);
4034         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4035
4036         if (initializer->kind == INITIALIZER_VALUE) {
4037                 initializer_value_t *initializer_value = &initializer->value;
4038
4039                 ir_node *value = expression_to_firm(initializer_value->value);
4040                 type = skip_typeref(type);
4041                 assign_value(dbgi, addr, type, value);
4042                 return;
4043         }
4044
4045         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4046                 ir_initializer_t *irinitializer
4047                         = create_ir_initializer(initializer, type);
4048
4049                 create_dynamic_initializer(irinitializer, dbgi, entity);
4050                 return;
4051         }
4052
4053         /* create a "template" entity which is copied to the entity on the stack */
4054         ir_entity *const init_entity
4055                 = create_initializer_entity(dbgi, initializer, type);
4056         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4057         ir_type *const irtype   = get_ir_type(type);
4058         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4059
4060         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4061         set_store(copyb_mem);
4062 }
4063
4064 static void create_initializer_local_variable_entity(entity_t *entity)
4065 {
4066         assert(entity->kind == ENTITY_VARIABLE);
4067         initializer_t *initializer = entity->variable.initializer;
4068         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4069         ir_entity     *irentity    = entity->variable.v.entity;
4070         type_t        *type        = entity->declaration.type;
4071
4072         create_local_initializer(initializer, dbgi, irentity, type);
4073 }
4074
4075 static void create_variable_initializer(entity_t *entity)
4076 {
4077         assert(entity->kind == ENTITY_VARIABLE);
4078         initializer_t *initializer = entity->variable.initializer;
4079         if (initializer == NULL)
4080                 return;
4081
4082         declaration_kind_t declaration_kind
4083                 = (declaration_kind_t) entity->declaration.kind;
4084         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4085                 create_initializer_local_variable_entity(entity);
4086                 return;
4087         }
4088
4089         type_t            *type = entity->declaration.type;
4090         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4091
4092         if (initializer->kind == INITIALIZER_VALUE) {
4093                 expression_t *      value     = initializer->value.value;
4094                 type_t       *const init_type = skip_typeref(value->base.type);
4095
4096                 if (!is_type_scalar(init_type)) {
4097                         /* skip convs */
4098                         while (value->kind == EXPR_UNARY_CAST)
4099                                 value = value->unary.value;
4100
4101                         if (value->kind != EXPR_COMPOUND_LITERAL)
4102                                 panic("expected non-scalar initializer to be a compound literal");
4103                         initializer = value->compound_literal.initializer;
4104                         goto have_initializer;
4105                 }
4106
4107                 ir_node  *      node = expression_to_firm(value);
4108                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4109                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4110                 node = create_conv(dbgi, node, mode);
4111
4112                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4113                         set_value(entity->variable.v.value_number, node);
4114                 } else {
4115                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4116
4117                         ir_entity *irentity = entity->variable.v.entity;
4118
4119                         if (tq & TYPE_QUALIFIER_CONST
4120                                         && get_entity_owner(irentity) != get_tls_type()) {
4121                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4122                         }
4123                         set_atomic_ent_value(irentity, node);
4124                 }
4125         } else {
4126 have_initializer:
4127                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4128                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4129
4130                 ir_entity        *irentity        = entity->variable.v.entity;
4131                 ir_initializer_t *irinitializer
4132                         = create_ir_initializer(initializer, type);
4133
4134                 if (tq & TYPE_QUALIFIER_CONST) {
4135                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4136                 }
4137                 set_entity_initializer(irentity, irinitializer);
4138         }
4139 }
4140
4141 static void create_variable_length_array(entity_t *entity)
4142 {
4143         assert(entity->kind == ENTITY_VARIABLE);
4144         assert(entity->variable.initializer == NULL);
4145
4146         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4147         entity->variable.v.vla_base = NULL;
4148
4149         /* TODO: record VLA somewhere so we create the free node when we leave
4150          * it's scope */
4151 }
4152
4153 static void allocate_variable_length_array(entity_t *entity)
4154 {
4155         assert(entity->kind == ENTITY_VARIABLE);
4156         assert(entity->variable.initializer == NULL);
4157         assert(currently_reachable());
4158
4159         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4160         type_t   *type      = entity->declaration.type;
4161         ir_type  *el_type   = get_ir_type(type->array.element_type);
4162
4163         /* make sure size_node is calculated */
4164         get_type_size_node(type);
4165         ir_node  *elems = type->array.size_node;
4166         ir_node  *mem   = get_store();
4167         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4168
4169         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4170         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4171         set_store(proj_m);
4172
4173         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4174         entity->variable.v.vla_base = addr;
4175 }
4176
4177 static bool var_needs_entity(variable_t const *const var)
4178 {
4179         if (var->address_taken)
4180                 return true;
4181         type_t *const type = skip_typeref(var->base.type);
4182         return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4183 }
4184
4185 /**
4186  * Creates a Firm local variable from a declaration.
4187  */
4188 static void create_local_variable(entity_t *entity)
4189 {
4190         assert(entity->kind == ENTITY_VARIABLE);
4191         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4192
4193         if (!var_needs_entity(&entity->variable)) {
4194                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4195                 entity->variable.v.value_number = next_value_number_function;
4196                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4197                 ++next_value_number_function;
4198                 return;
4199         }
4200
4201         /* is it a variable length array? */
4202         type_t *const type = skip_typeref(entity->declaration.type);
4203         if (is_type_array(type) && !type->array.size_constant) {
4204                 create_variable_length_array(entity);
4205                 return;
4206         }
4207
4208         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4209         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4210 }
4211
4212 static void create_local_static_variable(entity_t *entity)
4213 {
4214         assert(entity->kind == ENTITY_VARIABLE);
4215         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4216
4217         type_t   *type           = skip_typeref(entity->declaration.type);
4218         ir_type  *const var_type = entity->variable.thread_local ?
4219                 get_tls_type() : get_glob_type();
4220         ir_type  *const irtype   = get_ir_type(type);
4221         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4222
4223         size_t l = strlen(entity->base.symbol->string);
4224         char   buf[l + sizeof(".%u")];
4225         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4226         ident     *const id       = id_unique(buf);
4227         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4228
4229         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4230                 set_entity_volatility(irentity, volatility_is_volatile);
4231         }
4232
4233         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4234         entity->variable.v.entity = irentity;
4235
4236         set_entity_ld_ident(irentity, id);
4237         set_entity_visibility(irentity, ir_visibility_local);
4238
4239         if (entity->variable.initializer == NULL) {
4240                 ir_initializer_t *null_init = get_initializer_null();
4241                 set_entity_initializer(irentity, null_init);
4242         }
4243
4244         PUSH_IRG(get_const_code_irg());
4245         create_variable_initializer(entity);
4246         POP_IRG();
4247 }
4248
4249
4250
4251 static ir_node *return_statement_to_firm(return_statement_t *statement)
4252 {
4253         if (!currently_reachable())
4254                 return NULL;
4255
4256         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4257         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4258         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4259
4260         int in_len;
4261         if (!is_type_void(type)) {
4262                 ir_mode *const mode = get_ir_mode_storage(type);
4263                 if (res) {
4264                         res = create_conv(dbgi, res, mode);
4265                 } else {
4266                         res = new_Unknown(mode);
4267                 }
4268                 in_len = 1;
4269         } else {
4270                 in_len = 0;
4271         }
4272
4273         ir_node *const in[1] = { res };
4274         ir_node *const store = get_store();
4275         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4276
4277         ir_node *end_block = get_irg_end_block(current_ir_graph);
4278         add_immBlock_pred(end_block, ret);
4279
4280         set_unreachable_now();
4281         return NULL;
4282 }
4283
4284 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4285 {
4286         if (!currently_reachable())
4287                 return NULL;
4288
4289         return expression_to_firm(statement->expression);
4290 }
4291
4292 static void create_local_declarations(entity_t*);
4293
4294 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4295 {
4296         create_local_declarations(compound->scope.entities);
4297
4298         ir_node     *result    = NULL;
4299         statement_t *statement = compound->statements;
4300         for ( ; statement != NULL; statement = statement->base.next) {
4301                 result = statement_to_firm(statement);
4302         }
4303
4304         return result;
4305 }
4306
4307 static void create_global_variable(entity_t *entity)
4308 {
4309         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4310         ir_visibility       visibility = ir_visibility_external;
4311         storage_class_tag_t storage
4312                 = (storage_class_tag_t)entity->declaration.storage_class;
4313         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4314         assert(entity->kind == ENTITY_VARIABLE);
4315
4316         switch (storage) {
4317         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4318         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4319         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4320         case STORAGE_CLASS_TYPEDEF:
4321         case STORAGE_CLASS_AUTO:
4322         case STORAGE_CLASS_REGISTER:
4323                 panic("invalid storage class for global var");
4324         }
4325
4326         /* "common" symbols */
4327         if (storage == STORAGE_CLASS_NONE
4328             && entity->variable.initializer == NULL
4329             && !entity->variable.thread_local
4330             && (modifiers & DM_WEAK) == 0) {
4331                 linkage |= IR_LINKAGE_MERGE;
4332         }
4333
4334         ir_type *var_type = get_glob_type();
4335         if (entity->variable.thread_local) {
4336                 var_type = get_tls_type();
4337         }
4338         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4339         ir_entity *irentity = entity->variable.v.entity;
4340         add_entity_linkage(irentity, linkage);
4341         set_entity_visibility(irentity, visibility);
4342         if (entity->variable.initializer == NULL
4343             && storage != STORAGE_CLASS_EXTERN) {
4344                 ir_initializer_t *null_init = get_initializer_null();
4345                 set_entity_initializer(irentity, null_init);
4346         }
4347 }
4348
4349 static void create_local_declaration(entity_t *entity)
4350 {
4351         assert(is_declaration(entity));
4352
4353         /* construct type */
4354         (void) get_ir_type(entity->declaration.type);
4355         if (entity->base.symbol == NULL) {
4356                 return;
4357         }
4358
4359         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4360         case STORAGE_CLASS_STATIC:
4361                 if (entity->kind == ENTITY_FUNCTION) {
4362                         (void)get_function_entity(entity, NULL);
4363                 } else {
4364                         create_local_static_variable(entity);
4365                 }
4366                 return;
4367         case STORAGE_CLASS_EXTERN:
4368                 if (entity->kind == ENTITY_FUNCTION) {
4369                         assert(entity->function.body == NULL);
4370                         (void)get_function_entity(entity, NULL);
4371                 } else {
4372                         create_global_variable(entity);
4373                         create_variable_initializer(entity);
4374                 }
4375                 return;
4376         case STORAGE_CLASS_NONE:
4377         case STORAGE_CLASS_AUTO:
4378         case STORAGE_CLASS_REGISTER:
4379                 if (entity->kind == ENTITY_FUNCTION) {
4380                         if (entity->function.body != NULL) {
4381                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4382                                 (void)get_function_entity(entity, owner);
4383                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4384                                 enqueue_inner_function(entity);
4385                         } else {
4386                                 (void)get_function_entity(entity, NULL);
4387                         }
4388                 } else {
4389                         create_local_variable(entity);
4390                 }
4391                 return;
4392         case STORAGE_CLASS_TYPEDEF:
4393                 break;
4394         }
4395         panic("invalid storage class found");
4396 }
4397
4398 static void create_local_declarations(entity_t *e)
4399 {
4400         for (; e; e = e->base.next) {
4401                 if (is_declaration(e))
4402                         create_local_declaration(e);
4403         }
4404 }
4405
4406 static void initialize_local_declaration(entity_t *entity)
4407 {
4408         if (entity->base.symbol == NULL)
4409                 return;
4410
4411         // no need to emit code in dead blocks
4412         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4413                         && !currently_reachable())
4414                 return;
4415
4416         switch ((declaration_kind_t) entity->declaration.kind) {
4417         case DECLARATION_KIND_LOCAL_VARIABLE:
4418         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4419                 create_variable_initializer(entity);
4420                 return;
4421
4422         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4423                 allocate_variable_length_array(entity);
4424                 return;
4425
4426         case DECLARATION_KIND_COMPOUND_MEMBER:
4427         case DECLARATION_KIND_GLOBAL_VARIABLE:
4428         case DECLARATION_KIND_FUNCTION:
4429         case DECLARATION_KIND_INNER_FUNCTION:
4430                 return;
4431
4432         case DECLARATION_KIND_PARAMETER:
4433         case DECLARATION_KIND_PARAMETER_ENTITY:
4434                 panic("can't initialize parameters");
4435
4436         case DECLARATION_KIND_UNKNOWN:
4437                 panic("can't initialize unknown declaration");
4438         }
4439         panic("invalid declaration kind");
4440 }
4441
4442 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4443 {
4444         entity_t *entity = statement->declarations_begin;
4445         if (entity == NULL)
4446                 return NULL;
4447
4448         entity_t *const last = statement->declarations_end;
4449         for ( ;; entity = entity->base.next) {
4450                 if (is_declaration(entity)) {
4451                         initialize_local_declaration(entity);
4452                 } else if (entity->kind == ENTITY_TYPEDEF) {
4453                         /* §6.7.7:3  Any array size expressions associated with variable length
4454                          * array declarators are evaluated each time the declaration of the
4455                          * typedef name is reached in the order of execution. */
4456                         type_t *const type = skip_typeref(entity->typedefe.type);
4457                         if (is_type_array(type) && type->array.is_vla)
4458                                 get_vla_size(&type->array);
4459                 }
4460                 if (entity == last)
4461                         break;
4462         }
4463
4464         return NULL;
4465 }
4466
4467 static ir_node *if_statement_to_firm(if_statement_t *statement)
4468 {
4469         create_local_declarations(statement->scope.entities);
4470
4471         /* Create the condition. */
4472         jump_target true_target;
4473         jump_target false_target;
4474         init_jump_target(&true_target,  NULL);
4475         init_jump_target(&false_target, NULL);
4476         if (currently_reachable())
4477                 create_condition_evaluation(statement->condition, &true_target, &false_target);
4478
4479         jump_target exit_target;
4480         init_jump_target(&exit_target, NULL);
4481
4482         /* Create the true statement. */
4483         enter_jump_target(&true_target);
4484         statement_to_firm(statement->true_statement);
4485         jump_to_target(&exit_target);
4486
4487         /* Create the false statement. */
4488         enter_jump_target(&false_target);
4489         if (statement->false_statement)
4490                 statement_to_firm(statement->false_statement);
4491         jump_to_target(&exit_target);
4492
4493         enter_jump_target(&exit_target);
4494         return NULL;
4495 }
4496
4497 /**
4498  * Add an unconditional jump to the target block.  If the source block is not
4499  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4500  * loops.  This is necessary if the jump potentially enters a loop.
4501  */
4502 static void jump_to(ir_node *const target_block)
4503 {
4504         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4505         add_immBlock_pred(target_block, pred);
4506         set_cur_block(target_block);
4507 }
4508
4509 /**
4510  * Add an unconditional jump to the target block, if the current block is
4511  * reachable and do nothing otherwise.  This is only valid if the jump does not
4512  * enter a loop (a back edge is ok).
4513  */
4514 static void jump_if_reachable(ir_node *const target_block)
4515 {
4516         if (currently_reachable())
4517                 add_immBlock_pred(target_block, new_Jmp());
4518 }
4519
4520 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4521 {
4522         create_local_declarations(statement->scope.entities);
4523
4524         PUSH_BREAK(NULL);
4525         PUSH_CONTINUE(NULL);
4526
4527         expression_t *const cond = statement->condition;
4528         /* Avoid an explicit body block in case of do ... while (0);. */
4529         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4530                 /* do ... while (0);. */
4531                 statement_to_firm(statement->body);
4532                 jump_to_target(&continue_target);
4533                 enter_jump_target(&continue_target);
4534                 jump_to_target(&break_target);
4535         } else {
4536                 jump_target body_target;
4537                 init_jump_target(&body_target, NULL);
4538                 jump_to_target(&body_target);
4539                 enter_immature_jump_target(&body_target);
4540                 statement_to_firm(statement->body);
4541                 jump_to_target(&continue_target);
4542                 if (enter_jump_target(&continue_target))
4543                         create_condition_evaluation(statement->condition, &body_target, &break_target);
4544                 enter_jump_target(&body_target);
4545         }
4546         enter_jump_target(&break_target);
4547
4548         POP_CONTINUE();
4549         POP_BREAK();
4550         return NULL;
4551 }
4552
4553 static ir_node *for_statement_to_firm(for_statement_t *statement)
4554 {
4555         create_local_declarations(statement->scope.entities);
4556
4557         if (currently_reachable()) {
4558                 entity_t *entity = statement->scope.entities;
4559                 for ( ; entity != NULL; entity = entity->base.next) {
4560                         if (!is_declaration(entity))
4561                                 continue;
4562
4563                         initialize_local_declaration(entity);
4564                 }
4565
4566                 if (statement->initialisation != NULL) {
4567                         expression_to_firm(statement->initialisation);
4568                 }
4569         }
4570
4571         /* Create the header block */
4572         ir_node *const header_block = new_immBlock();
4573         jump_to(header_block);
4574
4575         expression_t *const step = statement->step;
4576         PUSH_BREAK(NULL);
4577         PUSH_CONTINUE(step ? NULL : header_block);
4578
4579         /* Create the condition. */
4580         expression_t *const cond = statement->condition;
4581         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4582                 jump_target body_target;
4583                 init_jump_target(&body_target, NULL);
4584                 create_condition_evaluation(cond, &body_target, &break_target);
4585                 enter_jump_target(&body_target);
4586         } else {
4587                 /* for-ever. */
4588                 keep_alive(header_block);
4589                 keep_all_memory(header_block);
4590         }
4591
4592         /* Create the loop body. */
4593         statement_to_firm(statement->body);
4594         jump_to_target(&continue_target);
4595
4596         /* Create the step code. */
4597         if (step && enter_jump_target(&continue_target)) {
4598                 expression_to_firm(step);
4599                 jump_if_reachable(header_block);
4600         }
4601
4602         mature_immBlock(header_block);
4603         enter_jump_target(&break_target);
4604
4605         POP_CONTINUE();
4606         POP_BREAK();
4607         return NULL;
4608 }
4609
4610 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4611 {
4612         if (!currently_reachable())
4613                 return NULL;
4614
4615         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4616         ir_node  *jump = new_d_Jmp(dbgi);
4617         add_immBlock_pred(target_block, jump);
4618
4619         set_unreachable_now();
4620         return NULL;
4621 }
4622
4623 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4624 {
4625         /* determine number of cases */
4626         size_t n_cases = 0;
4627         for (case_label_statement_t *l = statement->first_case; l != NULL;
4628              l = l->next) {
4629                 /* default case */
4630                 if (l->expression == NULL)
4631                         continue;
4632                 if (l->is_empty_range)
4633                         continue;
4634                 ++n_cases;
4635         }
4636
4637         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4638         size_t           i   = 0;
4639         for (case_label_statement_t *l = statement->first_case; l != NULL;
4640              l = l->next) {
4641             if (l->expression == NULL) {
4642                         l->pn = pn_Switch_default;
4643                         continue;
4644                 }
4645                 if (l->is_empty_range)
4646                         continue;
4647                 ir_tarval *min = l->first_case;
4648                 ir_tarval *max = l->last_case;
4649                 long       pn  = (long) i+1;
4650                 ir_switch_table_set(res, i++, min, max, pn);
4651                 l->pn = pn;
4652         }
4653         return res;
4654 }
4655
4656 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4657 {
4658         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4659         ir_node  *switch_node = NULL;
4660
4661         if (currently_reachable()) {
4662                 ir_node *expression = expression_to_firm(statement->expression);
4663                 ir_switch_table *table = create_switch_table(statement);
4664                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4665
4666                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4667         }
4668
4669         set_unreachable_now();
4670
4671         PUSH_BREAK(NULL);
4672         ir_node *const old_switch            = current_switch;
4673         const bool     old_saw_default_label = saw_default_label;
4674         saw_default_label                    = false;
4675         current_switch                       = switch_node;
4676
4677         statement_to_firm(statement->body);
4678         jump_to_target(&break_target);
4679
4680         if (!saw_default_label && switch_node) {
4681                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4682                 add_pred_to_jump_target(&break_target, proj);
4683         }
4684
4685         enter_jump_target(&break_target);
4686
4687         assert(current_switch == switch_node);
4688         current_switch    = old_switch;
4689         saw_default_label = old_saw_default_label;
4690         POP_BREAK();
4691         return NULL;
4692 }
4693
4694 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4695 {
4696         if (current_switch != NULL && !statement->is_empty_range) {
4697                 ir_node *block = new_immBlock();
4698                 /* Fallthrough from previous case */
4699                 jump_if_reachable(block);
4700
4701                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4702                 add_immBlock_pred(block, proj);
4703                 if (statement->expression == NULL)
4704                         saw_default_label = true;
4705
4706                 mature_immBlock(block);
4707                 set_cur_block(block);
4708         }
4709
4710         return statement_to_firm(statement->statement);
4711 }
4712
4713 static void try_mature_label(label_t *const label)
4714 {
4715         if (--label->n_users == 0 && !label->address_taken)
4716                 mature_immBlock(label->block);
4717 }
4718
4719 static ir_node *label_to_firm(const label_statement_t *statement)
4720 {
4721         label_t *const label = statement->label;
4722         ir_node *const block = get_label_block(label);
4723         jump_to(block);
4724
4725         keep_alive(block);
4726         keep_all_memory(block);
4727
4728         try_mature_label(label);
4729
4730         return statement_to_firm(statement->statement);
4731 }
4732
4733 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4734 {
4735         label_t *const label = stmt->label;
4736         create_jump_statement((statement_t*)stmt, get_label_block(label));
4737         try_mature_label(label);
4738         return NULL;
4739 }
4740
4741 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4742 {
4743         if (!currently_reachable())
4744                 return NULL;
4745
4746         ir_node  *const irn  = expression_to_firm(statement->expression);
4747         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4748         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
4749
4750         set_irn_link(ijmp, ijmp_list);
4751         ijmp_list = ijmp;
4752
4753         set_unreachable_now();
4754         return NULL;
4755 }
4756
4757 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4758 {
4759         bool           needs_memory = statement->is_volatile;
4760         size_t         n_clobbers   = 0;
4761         asm_clobber_t *clobber      = statement->clobbers;
4762         for ( ; clobber != NULL; clobber = clobber->next) {
4763                 const char *clobber_str = clobber->clobber.begin;
4764
4765                 if (!be_is_valid_clobber(clobber_str)) {
4766                         errorf(&statement->base.source_position,
4767                                    "invalid clobber '%s' specified", clobber->clobber);
4768                         continue;
4769                 }
4770
4771                 if (streq(clobber_str, "memory")) {
4772                         needs_memory = true;
4773                         continue;
4774                 }
4775
4776                 ident *id = new_id_from_str(clobber_str);
4777                 obstack_ptr_grow(&asm_obst, id);
4778                 ++n_clobbers;
4779         }
4780         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4781         ident **clobbers = NULL;
4782         if (n_clobbers > 0) {
4783                 clobbers = obstack_finish(&asm_obst);
4784         }
4785
4786         size_t n_inputs  = 0;
4787         asm_argument_t *argument = statement->inputs;
4788         for ( ; argument != NULL; argument = argument->next)
4789                 n_inputs++;
4790         size_t n_outputs = 0;
4791         argument = statement->outputs;
4792         for ( ; argument != NULL; argument = argument->next)
4793                 n_outputs++;
4794
4795         unsigned next_pos = 0;
4796
4797         ir_node *ins[n_inputs + n_outputs + 1];
4798         size_t   in_size = 0;
4799
4800         ir_asm_constraint tmp_in_constraints[n_outputs];
4801
4802         const expression_t *out_exprs[n_outputs];
4803         ir_node            *out_addrs[n_outputs];
4804         size_t              out_size = 0;
4805
4806         argument = statement->outputs;
4807         for ( ; argument != NULL; argument = argument->next) {
4808                 const char *constraints = argument->constraints.begin;
4809                 asm_constraint_flags_t asm_flags
4810                         = be_parse_asm_constraints(constraints);
4811
4812                 {
4813                         source_position_t const *const pos = &statement->base.source_position;
4814                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4815                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4816                         }
4817                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4818                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
4819                                 continue;
4820                         }
4821                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4822                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4823                                 continue;
4824                         }
4825                 }
4826
4827                 unsigned pos = next_pos++;
4828                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4829                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4830                         expression_t *expr = argument->expression;
4831                         ir_node      *addr = expression_to_addr(expr);
4832                         /* in+output, construct an artifical same_as constraint on the
4833                          * input */
4834                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4835                                 char     buf[64];
4836                                 ir_node *value = get_value_from_lvalue(expr, addr);
4837
4838                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4839
4840                                 ir_asm_constraint constraint;
4841                                 constraint.pos              = pos;
4842                                 constraint.constraint       = new_id_from_str(buf);
4843                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4844                                 tmp_in_constraints[in_size] = constraint;
4845                                 ins[in_size] = value;
4846
4847                                 ++in_size;
4848                         }
4849
4850                         out_exprs[out_size] = expr;
4851                         out_addrs[out_size] = addr;
4852                         ++out_size;
4853                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4854                         /* pure memory ops need no input (but we have to make sure we
4855                          * attach to the memory) */
4856                         assert(! (asm_flags &
4857                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4858                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4859                         needs_memory = true;
4860
4861                         /* we need to attach the address to the inputs */
4862                         expression_t *expr = argument->expression;
4863
4864                         ir_asm_constraint constraint;
4865                         constraint.pos              = pos;
4866                         constraint.constraint       = new_id_from_str(constraints);
4867                         constraint.mode             = mode_M;
4868                         tmp_in_constraints[in_size] = constraint;
4869
4870                         ins[in_size] = expression_to_addr(expr);
4871                         ++in_size;
4872                         continue;
4873                 } else {
4874                         errorf(&statement->base.source_position,
4875                                "only modifiers but no place set in constraints '%s'",
4876                                constraints);
4877                         continue;
4878                 }
4879
4880                 ir_asm_constraint constraint;
4881                 constraint.pos        = pos;
4882                 constraint.constraint = new_id_from_str(constraints);
4883                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
4884
4885                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4886         }
4887         assert(obstack_object_size(&asm_obst)
4888                         == out_size * sizeof(ir_asm_constraint));
4889         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4890
4891
4892         obstack_grow(&asm_obst, tmp_in_constraints,
4893                      in_size * sizeof(tmp_in_constraints[0]));
4894         /* find and count input and output arguments */
4895         argument = statement->inputs;
4896         for ( ; argument != NULL; argument = argument->next) {
4897                 const char *constraints = argument->constraints.begin;
4898                 asm_constraint_flags_t asm_flags
4899                         = be_parse_asm_constraints(constraints);
4900
4901                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4902                         errorf(&statement->base.source_position,
4903                                "some constraints in '%s' are not supported", constraints);
4904                         continue;
4905                 }
4906                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4907                         errorf(&statement->base.source_position,
4908                                "some constraints in '%s' are invalid", constraints);
4909                         continue;
4910                 }
4911                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4912                         errorf(&statement->base.source_position,
4913                                "write flag specified for input constraints '%s'",
4914                                constraints);
4915                         continue;
4916                 }
4917
4918                 ir_node *input;
4919                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4920                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4921                         /* we can treat this as "normal" input */
4922                         input = expression_to_firm(argument->expression);
4923                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4924                         /* pure memory ops need no input (but we have to make sure we
4925                          * attach to the memory) */
4926                         assert(! (asm_flags &
4927                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4928                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4929                         needs_memory = true;
4930                         input = expression_to_addr(argument->expression);
4931                 } else {
4932                         errorf(&statement->base.source_position,
4933                                "only modifiers but no place set in constraints '%s'",
4934                                constraints);
4935                         continue;
4936                 }
4937
4938                 ir_asm_constraint constraint;
4939                 constraint.pos        = next_pos++;
4940                 constraint.constraint = new_id_from_str(constraints);
4941                 constraint.mode       = get_irn_mode(input);
4942
4943                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4944                 ins[in_size++] = input;
4945         }
4946
4947         ir_node *mem = needs_memory ? get_store() : new_NoMem();
4948         assert(obstack_object_size(&asm_obst)
4949                         == in_size * sizeof(ir_asm_constraint));
4950         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4951
4952         /* create asm node */
4953         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4954
4955         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4956
4957         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4958                                   out_size, output_constraints,
4959                                   n_clobbers, clobbers, asm_text);
4960
4961         if (statement->is_volatile) {
4962                 set_irn_pinned(node, op_pin_state_pinned);
4963         } else {
4964                 set_irn_pinned(node, op_pin_state_floats);
4965         }
4966
4967         /* create output projs & connect them */
4968         if (needs_memory) {
4969                 ir_node *projm = new_Proj(node, mode_M, out_size);
4970                 set_store(projm);
4971         }
4972
4973         size_t i;
4974         for (i = 0; i < out_size; ++i) {
4975                 const expression_t *out_expr = out_exprs[i];
4976                 long                pn       = i;
4977                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
4978                 ir_node            *proj     = new_Proj(node, mode, pn);
4979                 ir_node            *addr     = out_addrs[i];
4980
4981                 set_value_for_expression_addr(out_expr, proj, addr);
4982         }
4983
4984         return NULL;
4985 }
4986
4987 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4988 {
4989         statement_to_firm(statement->try_statement);
4990         source_position_t const *const pos = &statement->base.source_position;
4991         warningf(WARN_OTHER, pos, "structured exception handling ignored");
4992         return NULL;
4993 }
4994
4995 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4996 {
4997         errorf(&statement->base.source_position, "__leave not supported yet");
4998         return NULL;
4999 }
5000
5001 /**
5002  * Transform a statement.
5003  */
5004 static ir_node *statement_to_firm(statement_t *const stmt)
5005 {
5006 #ifndef NDEBUG
5007         assert(!stmt->base.transformed);
5008         stmt->base.transformed = true;
5009 #endif
5010
5011         switch (stmt->kind) {
5012         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5013         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5014         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5015         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5016         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5017         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5018         case STATEMENT_EMPTY:         return NULL; /* nothing */
5019         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5020         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5021         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
5022         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5023         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5024         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5025         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5026         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5027         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5028
5029         {
5030                 jump_target *tgt;
5031         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
5032         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5033 jump:
5034                 jump_to_target(tgt);
5035                 set_unreachable_now();
5036                 return NULL;
5037         }
5038
5039         case STATEMENT_ERROR: panic("error statement found");
5040         }
5041         panic("statement not implemented");
5042 }
5043
5044 static int count_local_variables(const entity_t *entity,
5045                                  const entity_t *const last)
5046 {
5047         int count = 0;
5048         entity_t const *const end = last != NULL ? last->base.next : NULL;
5049         for (; entity != end; entity = entity->base.next) {
5050                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5051                     !var_needs_entity(&entity->variable))
5052                         ++count;
5053         }
5054         return count;
5055 }
5056
5057 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5058 {
5059         int *const count = env;
5060
5061         switch (stmt->kind) {
5062         case STATEMENT_DECLARATION: {
5063                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5064                 *count += count_local_variables(decl_stmt->declarations_begin,
5065                                 decl_stmt->declarations_end);
5066                 break;
5067         }
5068
5069         case STATEMENT_FOR:
5070                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5071                 break;
5072
5073         default:
5074                 break;
5075         }
5076 }
5077
5078 /**
5079  * Return the number of local (alias free) variables used by a function.
5080  */
5081 static int get_function_n_local_vars(entity_t *entity)
5082 {
5083         const function_t *function = &entity->function;
5084         int count = 0;
5085
5086         /* count parameters */
5087         count += count_local_variables(function->parameters.entities, NULL);
5088
5089         /* count local variables declared in body */
5090         walk_statements(function->body, count_local_variables_in_stmt, &count);
5091         return count;
5092 }
5093
5094 /**
5095  * Build Firm code for the parameters of a function.
5096  */
5097 static void initialize_function_parameters(entity_t *entity)
5098 {
5099         assert(entity->kind == ENTITY_FUNCTION);
5100         ir_graph *irg             = current_ir_graph;
5101         ir_node  *args            = get_irg_args(irg);
5102         int       n               = 0;
5103         ir_type  *function_irtype;
5104
5105         if (entity->function.need_closure) {
5106                 /* add an extra parameter for the static link */
5107                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5108                 ++n;
5109
5110                 /* Matze: IMO this is wrong, nested functions should have an own
5111                  * type and not rely on strange parameters... */
5112                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5113         } else {
5114                 function_irtype = get_ir_type(entity->declaration.type);
5115         }
5116
5117
5118
5119         entity_t *parameter = entity->function.parameters.entities;
5120         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5121                 if (parameter->kind != ENTITY_PARAMETER)
5122                         continue;
5123
5124                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5125                 type_t *type = skip_typeref(parameter->declaration.type);
5126
5127                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.source_position);
5128                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5129                 if (var_needs_entity(&parameter->variable)) {
5130                         ir_type   *frame_type = get_irg_frame_type(irg);
5131                         ir_entity *param
5132                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5133                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5134                         parameter->variable.v.entity = param;
5135                         continue;
5136                 }
5137
5138                 ir_mode *param_mode = get_type_mode(param_irtype);
5139                 long     pn         = n;
5140                 ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5141
5142                 ir_mode *mode = get_ir_mode_storage(type);
5143                 value = create_conv(NULL, value, mode);
5144
5145                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5146                 parameter->variable.v.value_number = next_value_number_function;
5147                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5148                                         parameter);
5149                 ++next_value_number_function;
5150
5151                 set_value(parameter->variable.v.value_number, value);
5152         }
5153 }
5154
5155 static void add_function_pointer(ir_type *segment, ir_entity *method,
5156                                  const char *unique_template)
5157 {
5158         ir_type   *method_type  = get_entity_type(method);
5159         ir_type   *ptr_type     = new_type_pointer(method_type);
5160
5161         /* these entities don't really have a name but firm only allows
5162          * "" in ld_ident.
5163          * Note that we mustn't give these entities a name since for example
5164          * Mach-O doesn't allow them. */
5165         ident     *ide          = id_unique(unique_template);
5166         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5167         ir_graph  *irg          = get_const_code_irg();
5168         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5169                                                            method);
5170
5171         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5172         set_entity_compiler_generated(ptr, 1);
5173         set_entity_visibility(ptr, ir_visibility_private);
5174         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5175         set_atomic_ent_value(ptr, val);
5176 }
5177
5178 /**
5179  * Generate possible IJmp branches to a given label block.
5180  */
5181 static void gen_ijmp_branches(ir_node *block)
5182 {
5183         ir_node *ijmp;
5184         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5185                 add_immBlock_pred(block, ijmp);
5186         }
5187 }
5188
5189 /**
5190  * Create code for a function and all inner functions.
5191  *
5192  * @param entity  the function entity
5193  */
5194 static void create_function(entity_t *entity)
5195 {
5196         assert(entity->kind == ENTITY_FUNCTION);
5197         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5198
5199         if (entity->function.body == NULL)
5200                 return;
5201
5202         inner_functions     = NULL;
5203         current_trampolines = NULL;
5204
5205         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5206                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5207                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5208         }
5209         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5210                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5211                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5212         }
5213
5214         current_function_entity = entity;
5215         current_function_name   = NULL;
5216         current_funcsig         = NULL;
5217
5218         assert(ijmp_blocks == NULL);
5219         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5220         ijmp_list   = NULL;
5221
5222         int       n_local_vars = get_function_n_local_vars(entity);
5223         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5224         current_ir_graph = irg;
5225
5226         ir_graph *old_current_function = current_function;
5227         current_function = irg;
5228
5229         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5230         current_vararg_entity = NULL;
5231
5232         set_irg_fp_model(irg, firm_fp_model);
5233         tarval_enable_fp_ops(1);
5234         set_irn_dbg_info(get_irg_start_block(irg),
5235                          get_entity_dbg_info(function_entity));
5236
5237         next_value_number_function = 0;
5238         initialize_function_parameters(entity);
5239         current_static_link = entity->function.static_link;
5240
5241         statement_to_firm(entity->function.body);
5242
5243         ir_node *end_block = get_irg_end_block(irg);
5244
5245         /* do we have a return statement yet? */
5246         if (currently_reachable()) {
5247                 type_t *type = skip_typeref(entity->declaration.type);
5248                 assert(is_type_function(type));
5249                 type_t *const return_type = skip_typeref(type->function.return_type);
5250
5251                 ir_node *ret;
5252                 if (is_type_void(return_type)) {
5253                         ret = new_Return(get_store(), 0, NULL);
5254                 } else {
5255                         ir_mode *const mode = get_ir_mode_storage(return_type);
5256
5257                         ir_node *in[1];
5258                         /* §5.1.2.2.3 main implicitly returns 0 */
5259                         if (is_main(entity)) {
5260                                 in[0] = new_Const(get_mode_null(mode));
5261                         } else {
5262                                 in[0] = new_Unknown(mode);
5263                         }
5264                         ret = new_Return(get_store(), 1, in);
5265                 }
5266                 add_immBlock_pred(end_block, ret);
5267         }
5268
5269         for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5270                 ir_node *const block = ijmp_blocks[i];
5271                 gen_ijmp_branches(block);
5272                 mature_immBlock(block);
5273         }
5274
5275         DEL_ARR_F(ijmp_blocks);
5276         ijmp_blocks = NULL;
5277
5278         irg_finalize_cons(irg);
5279
5280         /* finalize the frame type */
5281         ir_type *frame_type = get_irg_frame_type(irg);
5282         int      n          = get_compound_n_members(frame_type);
5283         int      align_all  = 4;
5284         int      offset     = 0;
5285         for (int i = 0; i < n; ++i) {
5286                 ir_entity *member      = get_compound_member(frame_type, i);
5287                 ir_type   *entity_type = get_entity_type(member);
5288
5289                 int align = get_type_alignment_bytes(entity_type);
5290                 if (align > align_all)
5291                         align_all = align;
5292                 int misalign = 0;
5293                 if (align > 0) {
5294                         misalign  = offset % align;
5295                         if (misalign > 0) {
5296                                 offset += align - misalign;
5297                         }
5298                 }
5299
5300                 set_entity_offset(member, offset);
5301                 offset += get_type_size_bytes(entity_type);
5302         }
5303         set_type_size_bytes(frame_type, offset);
5304         set_type_alignment_bytes(frame_type, align_all);
5305
5306         irg_verify(irg, VERIFY_ENFORCE_SSA);
5307         current_vararg_entity = old_current_vararg_entity;
5308         current_function      = old_current_function;
5309
5310         if (current_trampolines != NULL) {
5311                 DEL_ARR_F(current_trampolines);
5312                 current_trampolines = NULL;
5313         }
5314
5315         /* create inner functions if any */
5316         entity_t **inner = inner_functions;
5317         if (inner != NULL) {
5318                 ir_type *rem_outer_frame      = current_outer_frame;
5319                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5320                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5321                         create_function(inner[i]);
5322                 }
5323                 DEL_ARR_F(inner);
5324
5325                 current_outer_frame      = rem_outer_frame;
5326         }
5327 }
5328
5329 static void scope_to_firm(scope_t *scope)
5330 {
5331         /* first pass: create declarations */
5332         entity_t *entity = scope->entities;
5333         for ( ; entity != NULL; entity = entity->base.next) {
5334                 if (entity->base.symbol == NULL)
5335                         continue;
5336
5337                 if (entity->kind == ENTITY_FUNCTION) {
5338                         if (entity->function.btk != BUILTIN_NONE) {
5339                                 /* builtins have no representation */
5340                                 continue;
5341                         }
5342                         (void)get_function_entity(entity, NULL);
5343                 } else if (entity->kind == ENTITY_VARIABLE) {
5344                         create_global_variable(entity);
5345                 } else if (entity->kind == ENTITY_NAMESPACE) {
5346                         scope_to_firm(&entity->namespacee.members);
5347                 }
5348         }
5349
5350         /* second pass: create code/initializers */
5351         entity = scope->entities;
5352         for ( ; entity != NULL; entity = entity->base.next) {
5353                 if (entity->base.symbol == NULL)
5354                         continue;
5355
5356                 if (entity->kind == ENTITY_FUNCTION) {
5357                         if (entity->function.btk != BUILTIN_NONE) {
5358                                 /* builtins have no representation */
5359                                 continue;
5360                         }
5361                         create_function(entity);
5362                 } else if (entity->kind == ENTITY_VARIABLE) {
5363                         assert(entity->declaration.kind
5364                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5365                         current_ir_graph = get_const_code_irg();
5366                         create_variable_initializer(entity);
5367                 }
5368         }
5369 }
5370
5371 void init_ast2firm(void)
5372 {
5373         obstack_init(&asm_obst);
5374         init_atomic_modes();
5375
5376         ir_set_debug_retrieve(dbg_retrieve);
5377         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5378
5379         /* create idents for all known runtime functions */
5380         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5381                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5382         }
5383
5384         entitymap_init(&entitymap);
5385 }
5386
5387 static void init_ir_types(void)
5388 {
5389         static int ir_types_initialized = 0;
5390         if (ir_types_initialized)
5391                 return;
5392         ir_types_initialized = 1;
5393
5394         ir_type_char    = get_ir_type(type_char);
5395         ir_type_wchar_t = get_ir_type(type_wchar_t);
5396
5397         be_params             = be_get_backend_param();
5398         mode_float_arithmetic = be_params->mode_float_arithmetic;
5399
5400         stack_param_align     = be_params->stack_param_align;
5401 }
5402
5403 void exit_ast2firm(void)
5404 {
5405         entitymap_destroy(&entitymap);
5406         obstack_free(&asm_obst, NULL);
5407 }
5408
5409 static void global_asm_to_firm(statement_t *s)
5410 {
5411         for (; s != NULL; s = s->base.next) {
5412                 assert(s->kind == STATEMENT_ASM);
5413
5414                 char const *const text = s->asms.asm_text.begin;
5415                 size_t      const size = s->asms.asm_text.size;
5416                 ident      *const id   = new_id_from_chars(text, size);
5417                 add_irp_asm(id);
5418         }
5419 }
5420
5421 static const char *get_cwd(void)
5422 {
5423         static char buf[1024];
5424         if (buf[0] == '\0') {
5425                 return getcwd(buf, sizeof(buf));
5426         }
5427         return buf;
5428 }
5429
5430 void translation_unit_to_firm(translation_unit_t *unit)
5431 {
5432         if (c_mode & _CXX) {
5433                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5434         } else if (c_mode & _C99) {
5435                 be_dwarf_set_source_language(DW_LANG_C99);
5436         } else if (c_mode & _C89) {
5437                 be_dwarf_set_source_language(DW_LANG_C89);
5438         } else {
5439                 be_dwarf_set_source_language(DW_LANG_C);
5440         }
5441         const char *cwd = get_cwd();
5442         if (cwd != NULL) {
5443                 be_dwarf_set_compilation_directory(cwd);
5444         }
5445
5446         /* initialize firm arithmetic */
5447         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5448         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5449
5450         /* just to be sure */
5451         init_jump_target(&break_target,    NULL);
5452         init_jump_target(&continue_target, NULL);
5453         current_switch           = NULL;
5454         current_translation_unit = unit;
5455
5456         init_ir_types();
5457
5458         scope_to_firm(&unit->scope);
5459         global_asm_to_firm(unit->global_asm);
5460
5461         current_ir_graph         = NULL;
5462         current_translation_unit = NULL;
5463 }