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 "symbol_t.h"
  39 #include "token_t.h"
  40 #include "type_t.h"
  41 #include "ast_t.h"
  42 #include "entity_t.h"
  43 #include "parser.h"
  44 #include "diagnostic.h"
  45 #include "lang_features.h"
  46 #include "types.h"
  47 #include "type_hash.h"
  48 #include "mangle.h"
  49 #include "walk.h"
  50 #include "warning.h"
  51 #include "printer.h"
  52 #include "entitymap_t.h"
  53 #include "driver/firm_opt.h"
  54
  55 typedef struct trampoline_region trampoline_region;
  56 struct trampoline_region {
  57         ir_entity        *function;    /**< The function that is called by this trampoline */
  58         ir_entity        *region;      /**< created region for the trampoline */
  59 };
  60
  61 fp_model_t firm_fp_model = fp_model_precise;
  62
  63 static const backend_params *be_params;
  64
  65 static ir_type *ir_type_char;
  66 static ir_type *ir_type_const_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 ir_node   *continue_label;
  77 static ir_node   *break_label;
  78 static ir_node   *current_switch;
  79 static bool       saw_default_label;
  80 static label_t  **all_labels;
  81 static entity_t **inner_functions;
  82 static ir_node   *ijmp_list;
  83 static bool       constant_folding;
  84
  85 static const entity_t     *current_function_entity;
  86 static ir_node            *current_function_name;
  87 static ir_node            *current_funcsig;
  88 static ir_graph           *current_function;
  89 static translation_unit_t *current_translation_unit;
  90 static trampoline_region  *current_trampolines;
  91 static ir_type            *current_outer_frame;
  92 static ir_node            *current_static_link;
  93 static ir_entity          *current_vararg_entity;
  94
  95 static entitymap_t  entitymap;
  96
  97 static struct obstack asm_obst;
  98
  99 typedef enum declaration_kind_t {
 100         DECLARATION_KIND_UNKNOWN,
 101         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 102         DECLARATION_KIND_GLOBAL_VARIABLE,
 103         DECLARATION_KIND_LOCAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 105         DECLARATION_KIND_PARAMETER,
 106         DECLARATION_KIND_PARAMETER_ENTITY,
 107         DECLARATION_KIND_FUNCTION,
 108         DECLARATION_KIND_COMPOUND_MEMBER,
 109         DECLARATION_KIND_INNER_FUNCTION
 110 } declaration_kind_t;
 111
 112 static ir_type *get_ir_type_incomplete(type_t *type);
 113
 114 static void enqueue_inner_function(entity_t *entity)
 115 {
 116         if (inner_functions == NULL)
 117                 inner_functions = NEW_ARR_F(entity_t *, 0);
 118         ARR_APP1(entity_t*, inner_functions, entity);
 119 }
 120
 121 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 122 {
 123         const entity_t *entity = get_irg_loc_description(irg, pos);
 124
 125         if (entity != NULL) {
 126                 source_position_t const *const pos = &entity->base.source_position;
 127                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 128         }
 129         return new_r_Unknown(irg, mode);
 130 }
 131
 132 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 133 {
 134         source_position_t const *const pos = (source_position_t const*)dbg;
 135         if (pos) {
 136                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 137         } else {
 138                 return (src_loc_t){ NULL, 0, 0 };
 139         }
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 148                                     const type_dbg_info *dbg)
 149 {
 150         assert(dbg != NULL);
 151         print_to_buffer(buffer, buffer_size);
 152         const type_t *type = (const type_t*) dbg;
 153         print_type(type);
 154         finish_print_to_buffer();
 155 }
 156
 157 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 158 {
 159         return (type_dbg_info*) type;
 160 }
 161
 162 /* is the current block a reachable one? */
 163 static bool currently_reachable(void)
 164 {
 165         ir_node *const block = get_cur_block();
 166         return block != NULL && !is_Bad(block);
 167 }
 168
 169 static void set_unreachable_now(void)
 170 {
 171         set_cur_block(NULL);
 172 }
 173
 174 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 175
 176 static ir_node *_expression_to_firm(const expression_t *expression);
 177 static ir_node *expression_to_firm(const expression_t *expression);
 178
 179 static unsigned decide_modulo_shift(unsigned type_size)
 180 {
 181         if (architecture_modulo_shift == 0)
 182                 return 0;
 183         if (type_size < architecture_modulo_shift)
 184                 return architecture_modulo_shift;
 185         return type_size;
 186 }
 187
 188 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 189 {
 190         unsigned flags = get_atomic_type_flags(kind);
 191         unsigned size  = get_atomic_type_size(kind);
 192         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 193             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 194                 if (size == 4) {
 195                         return get_modeF();
 196                 } else if (size == 8) {
 197                         return get_modeD();
 198                 } else {
 199                         panic("unexpected kind");
 200                 }
 201         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 202                 char            name[64];
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 206
 207                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 208                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 209                                     modulo_shift);
 210         }
 211
 212         return NULL;
 213 }
 214
 215 /**
 216  * Initialises the atomic modes depending on the machine size.
 217  */
 218 static void init_atomic_modes(void)
 219 {
 220         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 221         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 222                 if (atomic_modes[i] != NULL)
 223                         continue;
 224                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 225         }
 226 }
 227
 228 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 229 {
 230         assert(kind <= ATOMIC_TYPE_LAST);
 231         return atomic_modes[kind];
 232 }
 233
 234 static ir_node *get_vla_size(array_type_t *const type)
 235 {
 236         ir_node *size_node = type->size_node;
 237         if (size_node == NULL) {
 238                 size_node = expression_to_firm(type->size_expression);
 239                 type->size_node = size_node;
 240         }
 241         return size_node;
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256 /**
 257  * Creates a Firm type for an atomic type
 258  */
 259 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 260 {
 261         ir_mode        *mode      = atomic_modes[akind];
 262         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 263         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 264         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 265
 266         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 267         set_type_alignment_bytes(irtype, alignment);
 268
 269         return irtype;
 270 }
 271
 272 /**
 273  * Creates a Firm type for a complex type
 274  */
 275 static ir_type *create_complex_type(const atomic_type_t *type)
 276 {
 277         atomic_type_kind_t  kind = type->akind;
 278         ir_mode            *mode = atomic_modes[kind];
 279         ident              *id   = get_mode_ident(mode);
 280
 281         (void) id;
 282
 283         /* FIXME: finish the array */
 284         return NULL;
 285 }
 286
 287 /**
 288  * Creates a Firm type for an imaginary type
 289  */
 290 static ir_type *create_imaginary_type(const atomic_type_t *type)
 291 {
 292         return create_atomic_type(type->akind, (const type_t*)type);
 293 }
 294
 295 /**
 296  * return type of a parameter (and take transparent union gnu extension into
 297  * account)
 298  */
 299 static type_t *get_parameter_type(type_t *orig_type)
 300 {
 301         type_t *type = skip_typeref(orig_type);
 302         if (is_type_union(type)
 303                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 304                 compound_t *compound = type->compound.compound;
 305                 type                 = compound->members.entities->declaration.type;
 306         }
 307
 308         return type;
 309 }
 310
 311 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 312 {
 313         type_t        *return_type  = skip_typeref(function_type->return_type);
 314
 315         int            n_parameters = count_parameters(function_type)
 316                                        + (for_closure ? 1 : 0);
 317         int            n_results    = is_type_void(return_type) ? 0 : 1;
 318         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 319         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 320
 321         if (!is_type_void(return_type)) {
 322                 ir_type *restype = get_ir_type(return_type);
 323                 set_method_res_type(irtype, 0, restype);
 324         }
 325
 326         function_parameter_t *parameter = function_type->parameters;
 327         int                   n         = 0;
 328         if (for_closure) {
 329                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 330                 set_method_param_type(irtype, n, p_irtype);
 331                 ++n;
 332         }
 333         for ( ; parameter != NULL; parameter = parameter->next) {
 334                 type_t  *type     = get_parameter_type(parameter->type);
 335                 ir_type *p_irtype = get_ir_type(type);
 336                 set_method_param_type(irtype, n, p_irtype);
 337                 ++n;
 338         }
 339
 340         bool is_variadic = function_type->variadic;
 341
 342         if (is_variadic)
 343                 set_method_variadicity(irtype, variadicity_variadic);
 344
 345         unsigned cc = get_method_calling_convention(irtype);
 346         switch (function_type->calling_convention) {
 347         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 348         case CC_CDECL:
 349 is_cdecl:
 350                 set_method_calling_convention(irtype, SET_CDECL(cc));
 351                 break;
 352
 353         case CC_STDCALL:
 354                 if (is_variadic)
 355                         goto is_cdecl;
 356
 357                 /* only non-variadic function can use stdcall, else use cdecl */
 358                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 359                 break;
 360
 361         case CC_FASTCALL:
 362                 if (is_variadic)
 363                         goto is_cdecl;
 364                 /* only non-variadic function can use fastcall, else use cdecl */
 365                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 366                 break;
 367
 368         case CC_THISCALL:
 369                 /* Hmm, leave default, not accepted by the parser yet. */
 370                 break;
 371         }
 372
 373         if (for_closure)
 374                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 375
 376         const decl_modifiers_t modifiers = function_type->modifiers;
 377         if (modifiers & DM_CONST)
 378                 add_method_additional_properties(irtype, mtp_property_const);
 379         if (modifiers & DM_PURE)
 380                 add_method_additional_properties(irtype, mtp_property_pure);
 381         if (modifiers & DM_RETURNS_TWICE)
 382                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 383         if (modifiers & DM_NORETURN)
 384                 add_method_additional_properties(irtype, mtp_property_noreturn);
 385         if (modifiers & DM_NOTHROW)
 386                 add_method_additional_properties(irtype, mtp_property_nothrow);
 387         if (modifiers & DM_MALLOC)
 388                 add_method_additional_properties(irtype, mtp_property_malloc);
 389
 390         return irtype;
 391 }
 392
 393 static ir_type *create_pointer_type(pointer_type_t *type)
 394 {
 395         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 396         type_t        *points_to    = type->points_to;
 397         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 398         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 399
 400         return irtype;
 401 }
 402
 403 static ir_type *create_reference_type(reference_type_t *type)
 404 {
 405         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 406         type_t        *refers_to    = type->refers_to;
 407         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 408         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 409
 410         return irtype;
 411 }
 412
 413 static ir_type *create_array_type(array_type_t *type)
 414 {
 415         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 416         type_t        *element_type    = type->element_type;
 417         ir_type       *ir_element_type = get_ir_type(element_type);
 418         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 419
 420         const int align = get_type_alignment_bytes(ir_element_type);
 421         set_type_alignment_bytes(irtype, align);
 422
 423         if (type->size_constant) {
 424                 int n_elements = type->size;
 425
 426                 set_array_bounds_int(irtype, 0, 0, n_elements);
 427
 428                 size_t elemsize = get_type_size_bytes(ir_element_type);
 429                 if (elemsize % align > 0) {
 430                         elemsize += align - (elemsize % align);
 431                 }
 432                 set_type_size_bytes(irtype, n_elements * elemsize);
 433         } else {
 434                 set_array_lower_bound_int(irtype, 0, 0);
 435         }
 436         set_type_state(irtype, layout_fixed);
 437
 438         return irtype;
 439 }
 440
 441 /**
 442  * Return the signed integer type of size bits.
 443  *
 444  * @param size   the size
 445  */
 446 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 447                                                  unsigned size,
 448                                                                                                  const type_t *type)
 449 {
 450         static ir_mode *s_modes[64 + 1] = {NULL, };
 451         ir_type *res;
 452         ir_mode *mode;
 453
 454         if (size <= 0 || size > 64)
 455                 return NULL;
 456
 457         mode = s_modes[size];
 458         if (mode == NULL) {
 459                 char name[32];
 460
 461                 snprintf(name, sizeof(name), "bf_I%u", size);
 462                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 463                 s_modes[size] = mode;
 464         }
 465
 466         type_dbg_info *dbgi = get_type_dbg_info_(type);
 467         res                 = new_d_type_primitive(mode, dbgi);
 468         set_primitive_base_type(res, base_tp);
 469
 470         return res;
 471 }
 472
 473 /**
 474  * Return the unsigned integer type of size bits.
 475  *
 476  * @param size   the size
 477  */
 478 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 479                                                    unsigned size,
 480                                                                                                    const type_t *type)
 481 {
 482         static ir_mode *u_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = u_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_U%u", size);
 494                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 495                 u_modes[size] = mode;
 496         }
 497
 498         type_dbg_info *dbgi = get_type_dbg_info_(type);
 499         res = new_d_type_primitive(mode, dbgi);
 500         set_primitive_base_type(res, base_tp);
 501
 502         return res;
 503 }
 504
 505 static ir_type *create_bitfield_type(const entity_t *entity)
 506 {
 507         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 508         type_t *base = skip_typeref(entity->declaration.type);
 509         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 510         ir_type *irbase = get_ir_type(base);
 511
 512         unsigned bit_size = entity->compound_member.bit_size;
 513
 514         assert(!is_type_float(base));
 515         if (is_type_signed(base)) {
 516                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 517         } else {
 518                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 519         }
 520 }
 521
 522 /**
 523  * Construct firm type from ast struct type.
 524  */
 525 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 526 {
 527         compound_t *compound = type->compound;
 528
 529         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 530                 return compound->irtype;
 531         }
 532
 533         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 534
 535         symbol_t *type_symbol = compound->base.symbol;
 536         ident    *id;
 537         if (type_symbol != NULL) {
 538                 id = new_id_from_str(type_symbol->string);
 539         } else {
 540                 if (is_union) {
 541                         id = id_unique("__anonymous_union.%u");
 542                 } else {
 543                         id = id_unique("__anonymous_struct.%u");
 544                 }
 545         }
 546
 547         ir_type *irtype;
 548         if (is_union) {
 549                 irtype = new_type_union(id);
 550         } else {
 551                 irtype = new_type_struct(id);
 552         }
 553
 554         compound->irtype_complete = false;
 555         compound->irtype          = irtype;
 556
 557         if (incomplete)
 558                 return irtype;
 559
 560         if (is_union) {
 561                 layout_union_type(type);
 562         } else {
 563                 layout_struct_type(type);
 564         }
 565
 566         compound->irtype_complete = true;
 567
 568         entity_t *entry = compound->members.entities;
 569         for ( ; entry != NULL; entry = entry->base.next) {
 570                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 571                         continue;
 572
 573                 symbol_t *symbol     = entry->base.symbol;
 574                 type_t   *entry_type = entry->declaration.type;
 575                 ident    *ident;
 576                 if (symbol == NULL) {
 577                         /* anonymous bitfield member, skip */
 578                         if (entry->compound_member.bitfield)
 579                                 continue;
 580                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 581                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 582                         ident = id_unique("anon.%u");
 583                 } else {
 584                         ident = new_id_from_str(symbol->string);
 585                 }
 586
 587                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 588
 589                 ir_type *entry_irtype;
 590                 if (entry->compound_member.bitfield) {
 591                         entry_irtype = create_bitfield_type(entry);
 592                 } else {
 593                         entry_irtype = get_ir_type(entry_type);
 594                 }
 595                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 596
 597                 set_entity_offset(entity, entry->compound_member.offset);
 598                 set_entity_offset_bits_remainder(entity,
 599                                                  entry->compound_member.bit_offset);
 600
 601                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 602                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 603                 entry->compound_member.entity = entity;
 604         }
 605
 606         set_type_alignment_bytes(irtype, compound->alignment);
 607         set_type_size_bytes(irtype, compound->size);
 608         set_type_state(irtype, layout_fixed);
 609
 610         return irtype;
 611 }
 612
 613 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 614
 615 static void determine_enum_values(enum_type_t *const type)
 616 {
 617         ir_mode   *const mode    = atomic_modes[type->base.akind];
 618         ir_tarval *const one     = get_mode_one(mode);
 619         ir_tarval *      tv_next = get_mode_null(mode);
 620
 621         enum_t   *enume = type->enume;
 622         entity_t *entry = enume->base.next;
 623         for (; entry != NULL; entry = entry->base.next) {
 624                 if (entry->kind != ENTITY_ENUM_VALUE)
 625                         break;
 626
 627                 expression_t *const init = entry->enum_value.value;
 628                 if (init != NULL) {
 629                         tv_next = fold_constant_to_tarval(init);
 630                 }
 631                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 632                 entry->enum_value.tv = tv_next;
 633                 tv_next = tarval_add(tv_next, one);
 634         }
 635 }
 636
 637 static ir_type *create_enum_type(enum_type_t *const type)
 638 {
 639         return create_atomic_type(type->base.akind, (const type_t*) type);
 640 }
 641
 642 static ir_type *get_ir_type_incomplete(type_t *type)
 643 {
 644         assert(type != NULL);
 645         type = skip_typeref(type);
 646
 647         if (type->base.firm_type != NULL) {
 648                 return type->base.firm_type;
 649         }
 650
 651         if (is_type_compound(type)) {
 652                 return create_compound_type(&type->compound, true);
 653         } else {
 654                 return get_ir_type(type);
 655         }
 656 }
 657
 658 ir_type *get_ir_type(type_t *type)
 659 {
 660         assert(type != NULL);
 661
 662         type = skip_typeref(type);
 663
 664         if (type->base.firm_type != NULL) {
 665                 return type->base.firm_type;
 666         }
 667
 668         ir_type *firm_type = NULL;
 669         switch (type->kind) {
 670         case TYPE_ATOMIC:
 671                 firm_type = create_atomic_type(type->atomic.akind, type);
 672                 break;
 673         case TYPE_COMPLEX:
 674                 firm_type = create_complex_type(&type->atomic);
 675                 break;
 676         case TYPE_IMAGINARY:
 677                 firm_type = create_imaginary_type(&type->atomic);
 678                 break;
 679         case TYPE_FUNCTION:
 680                 firm_type = create_method_type(&type->function, false);
 681                 break;
 682         case TYPE_POINTER:
 683                 firm_type = create_pointer_type(&type->pointer);
 684                 break;
 685         case TYPE_REFERENCE:
 686                 firm_type = create_reference_type(&type->reference);
 687                 break;
 688         case TYPE_ARRAY:
 689                 firm_type = create_array_type(&type->array);
 690                 break;
 691         case TYPE_COMPOUND_STRUCT:
 692         case TYPE_COMPOUND_UNION:
 693                 firm_type = create_compound_type(&type->compound, false);
 694                 break;
 695         case TYPE_ENUM:
 696                 firm_type = create_enum_type(&type->enumt);
 697                 break;
 698
 699         case TYPE_ERROR:
 700         case TYPE_TYPEOF:
 701         case TYPE_TYPEDEF:
 702                 break;
 703         }
 704         if (firm_type == NULL)
 705                 panic("unknown type found");
 706
 707         type->base.firm_type = firm_type;
 708         return firm_type;
 709 }
 710
 711 static ir_mode *get_ir_mode_storage(type_t *type)
 712 {
 713         type = skip_typeref(type);
 714
 715         /* Firm doesn't report a mode for arrays and structs/unions. */
 716         if (!is_type_scalar(type)) {
 717                 return mode_P_data;
 718         }
 719
 720         ir_type *const irtype = get_ir_type(type);
 721         ir_mode *const mode   = get_type_mode(irtype);
 722         assert(mode != NULL);
 723         return mode;
 724 }
 725
 726 /*
 727  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 728  * int that it returns bigger modes for floating point on some platforms
 729  * (x87 internally does arithemtic with 80bits)
 730  */
 731 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 732 {
 733         ir_mode *mode = get_ir_mode_storage(type);
 734         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 735                 return mode_float_arithmetic;
 736         }
 737
 738         return mode;
 739 }
 740
 741 /**
 742  * Return a node representing the size of a type.
 743  */
 744 static ir_node *get_type_size_node(type_t *type)
 745 {
 746         unsigned size;
 747         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 748         type = skip_typeref(type);
 749
 750         if (is_type_array(type) && type->array.is_vla) {
 751                 ir_node *size_node = get_vla_size(&type->array);
 752                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 753                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 754                 return real_size;
 755         }
 756
 757         size = get_type_size(type);
 758         return new_Const_long(mode, size);
 759 }
 760
 761 /** Names of the runtime functions. */
 762 static const struct {
 763         int        id;           /**< the rts id */
 764         int        n_res;        /**< number of return values */
 765         const char *name;        /**< the name of the rts function */
 766         int        n_params;     /**< number of parameters */
 767         unsigned   flags;        /**< language flags */
 768 } rts_data[] = {
 769         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 770         { rts_abort,      0, "abort",        0, _C89 },
 771         { rts_alloca,     1, "alloca",       1, _ALL },
 772         { rts_abs,        1, "abs",          1, _C89 },
 773         { rts_labs,       1, "labs",         1, _C89 },
 774         { rts_llabs,      1, "llabs",        1, _C99 },
 775         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 776
 777         { rts_fabs,       1, "fabs",         1, _C89 },
 778         { rts_sqrt,       1, "sqrt",         1, _C89 },
 779         { rts_cbrt,       1, "cbrt",         1, _C99 },
 780         { rts_exp,        1, "exp",          1, _C89 },
 781         { rts_exp2,       1, "exp2",         1, _C89 },
 782         { rts_exp10,      1, "exp10",        1, _GNUC },
 783         { rts_log,        1, "log",          1, _C89 },
 784         { rts_log2,       1, "log2",         1, _C89 },
 785         { rts_log10,      1, "log10",        1, _C89 },
 786         { rts_pow,        1, "pow",          2, _C89 },
 787         { rts_sin,        1, "sin",          1, _C89 },
 788         { rts_cos,        1, "cos",          1, _C89 },
 789         { rts_tan,        1, "tan",          1, _C89 },
 790         { rts_asin,       1, "asin",         1, _C89 },
 791         { rts_acos,       1, "acos",         1, _C89 },
 792         { rts_atan,       1, "atan",         1, _C89 },
 793         { rts_sinh,       1, "sinh",         1, _C89 },
 794         { rts_cosh,       1, "cosh",         1, _C89 },
 795         { rts_tanh,       1, "tanh",         1, _C89 },
 796
 797         { rts_fabsf,      1, "fabsf",        1, _C99 },
 798         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 799         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 800         { rts_expf,       1, "expf",         1, _C99 },
 801         { rts_exp2f,      1, "exp2f",        1, _C99 },
 802         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 803         { rts_logf,       1, "logf",         1, _C99 },
 804         { rts_log2f,      1, "log2f",        1, _C99 },
 805         { rts_log10f,     1, "log10f",       1, _C99 },
 806         { rts_powf,       1, "powf",         2, _C99 },
 807         { rts_sinf,       1, "sinf",         1, _C99 },
 808         { rts_cosf,       1, "cosf",         1, _C99 },
 809         { rts_tanf,       1, "tanf",         1, _C99 },
 810         { rts_asinf,      1, "asinf",        1, _C99 },
 811         { rts_acosf,      1, "acosf",        1, _C99 },
 812         { rts_atanf,      1, "atanf",        1, _C99 },
 813         { rts_sinhf,      1, "sinhf",        1, _C99 },
 814         { rts_coshf,      1, "coshf",        1, _C99 },
 815         { rts_tanhf,      1, "tanhf",        1, _C99 },
 816
 817         { rts_fabsl,      1, "fabsl",        1, _C99 },
 818         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 819         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 820         { rts_expl,       1, "expl",         1, _C99 },
 821         { rts_exp2l,      1, "exp2l",        1, _C99 },
 822         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 823         { rts_logl,       1, "logl",         1, _C99 },
 824         { rts_log2l,      1, "log2l",        1, _C99 },
 825         { rts_log10l,     1, "log10l",       1, _C99 },
 826         { rts_powl,       1, "powl",         2, _C99 },
 827         { rts_sinl,       1, "sinl",         1, _C99 },
 828         { rts_cosl,       1, "cosl",         1, _C99 },
 829         { rts_tanl,       1, "tanl",         1, _C99 },
 830         { rts_asinl,      1, "asinl",        1, _C99 },
 831         { rts_acosl,      1, "acosl",        1, _C99 },
 832         { rts_atanl,      1, "atanl",        1, _C99 },
 833         { rts_sinhl,      1, "sinhl",        1, _C99 },
 834         { rts_coshl,      1, "coshl",        1, _C99 },
 835         { rts_tanhl,      1, "tanhl",        1, _C99 },
 836
 837         { rts_strcmp,     1, "strcmp",       2, _C89 },
 838         { rts_strncmp,    1, "strncmp",      3, _C89 },
 839         { rts_strcpy,     1, "strcpy",       2, _C89 },
 840         { rts_strlen,     1, "strlen",       1, _C89 },
 841         { rts_memcpy,     1, "memcpy",       3, _C89 },
 842         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 843         { rts_memmove,    1, "memmove",      3, _C89 },
 844         { rts_memset,     1, "memset",       3, _C89 },
 845         { rts_memcmp,     1, "memcmp",       3, _C89 },
 846 };
 847
 848 static ident *rts_idents[lengthof(rts_data)];
 849
 850 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 851
 852 void set_create_ld_ident(ident *(*func)(entity_t*))
 853 {
 854         create_ld_ident = func;
 855 }
 856
 857 static bool declaration_is_definition(const entity_t *entity)
 858 {
 859         switch (entity->kind) {
 860         case ENTITY_VARIABLE:
 861                 return entity->variable.initializer != NULL;
 862         case ENTITY_FUNCTION:
 863                 return entity->function.statement != NULL;
 864         case ENTITY_PARAMETER:
 865         case ENTITY_COMPOUND_MEMBER:
 866                 return false;
 867         case ENTITY_TYPEDEF:
 868         case ENTITY_ENUM:
 869         case ENTITY_ENUM_VALUE:
 870         case ENTITY_NAMESPACE:
 871         case ENTITY_LABEL:
 872         case ENTITY_LOCAL_LABEL:
 873                 break;
 874         }
 875         panic("declaration_is_definition called on non-declaration");
 876 }
 877
 878 /**
 879  * Handle GNU attributes for entities
 880  *
 881  * @param ent   the entity
 882  * @param decl  the routine declaration
 883  */
 884 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 885 {
 886         assert(is_declaration(entity));
 887         decl_modifiers_t modifiers = entity->declaration.modifiers;
 888
 889         if (is_method_entity(irentity)) {
 890                 if (modifiers & DM_PURE) {
 891                         set_entity_additional_properties(irentity, mtp_property_pure);
 892                 }
 893                 if (modifiers & DM_CONST) {
 894                         add_entity_additional_properties(irentity, mtp_property_const);
 895                 }
 896         }
 897         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 898                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 899         }
 900         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 901             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 902                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 903         }
 904 }
 905
 906 static bool is_main(entity_t *entity)
 907 {
 908         static symbol_t *sym_main = NULL;
 909         if (sym_main == NULL) {
 910                 sym_main = symbol_table_insert("main");
 911         }
 912
 913         if (entity->base.symbol != sym_main)
 914                 return false;
 915         /* must be in outermost scope */
 916         if (entity->base.parent_scope != &current_translation_unit->scope)
 917                 return false;
 918
 919         return true;
 920 }
 921
 922 /**
 923  * Creates an entity representing a function.
 924  *
 925  * @param entity       the function declaration/definition
 926  * @param owner_type   the owner type of this function, NULL
 927  *                     for global functions
 928  */
 929 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 930 {
 931         assert(entity->kind == ENTITY_FUNCTION);
 932         if (entity->function.irentity != NULL)
 933                 return entity->function.irentity;
 934
 935         switch (entity->function.btk) {
 936         case BUILTIN_NONE:
 937         case BUILTIN_LIBC:
 938         case BUILTIN_LIBC_CHECK:
 939                 break;
 940         default:
 941                 return NULL;
 942         }
 943
 944         symbol_t *symbol = entity->base.symbol;
 945         ident    *id     = new_id_from_str(symbol->string);
 946
 947         /* already an entity defined? */
 948         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 949         bool const has_body = entity->function.statement != NULL;
 950         if (irentity != NULL) {
 951                 goto entity_created;
 952         }
 953
 954         ir_type *ir_type_method;
 955         if (entity->function.need_closure)
 956                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 957         else
 958                 ir_type_method = get_ir_type(entity->declaration.type);
 959
 960         bool nested_function = false;
 961         if (owner_type == NULL)
 962                 owner_type = get_glob_type();
 963         else
 964                 nested_function = true;
 965
 966         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 967         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 968
 969         ident *ld_id;
 970         if (nested_function)
 971                 ld_id = id_unique("inner.%u");
 972         else
 973                 ld_id = create_ld_ident(entity);
 974         set_entity_ld_ident(irentity, ld_id);
 975
 976         handle_decl_modifiers(irentity, entity);
 977
 978         if (! nested_function) {
 979                 storage_class_tag_t const storage_class
 980                         = (storage_class_tag_t) entity->declaration.storage_class;
 981                 if (storage_class == STORAGE_CLASS_STATIC) {
 982                     set_entity_visibility(irentity, ir_visibility_local);
 983                 } else {
 984                     set_entity_visibility(irentity, ir_visibility_external);
 985                 }
 986
 987                 bool const is_inline = entity->function.is_inline;
 988                 if (is_inline && has_body) {
 989                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
 990                             || ((c_mode & _C99) == 0
 991                                 && storage_class == STORAGE_CLASS_EXTERN)) {
 992                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
 993                         }
 994                 }
 995         } else {
 996                 /* nested functions are always local */
 997                 set_entity_visibility(irentity, ir_visibility_local);
 998         }
 999
1000         /* We should check for file scope here, but as long as we compile C only
1001            this is not needed. */
1002         if (!freestanding && !has_body) {
1003                 /* check for a known runtime function */
1004                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1005                         if (id != rts_idents[i])
1006                                 continue;
1007
1008                         function_type_t *function_type
1009                                 = &entity->declaration.type->function;
1010                         /* rts_entities code can't handle a "wrong" number of parameters */
1011                         if (function_type->unspecified_parameters)
1012                                 continue;
1013
1014                         /* check number of parameters */
1015                         int n_params = count_parameters(function_type);
1016                         if (n_params != rts_data[i].n_params)
1017                                 continue;
1018
1019                         type_t *return_type = skip_typeref(function_type->return_type);
1020                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1021                         if (n_res != rts_data[i].n_res)
1022                                 continue;
1023
1024                         /* ignore those rts functions not necessary needed for current mode */
1025                         if ((c_mode & rts_data[i].flags) == 0)
1026                                 continue;
1027                         assert(rts_entities[rts_data[i].id] == NULL);
1028                         rts_entities[rts_data[i].id] = irentity;
1029                 }
1030         }
1031
1032         entitymap_insert(&entitymap, symbol, irentity);
1033
1034 entity_created:
1035         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1036         entity->function.irentity = irentity;
1037
1038         return irentity;
1039 }
1040
1041 /**
1042  * Creates a SymConst for a given entity.
1043  *
1044  * @param dbgi    debug info
1045  * @param entity  the entity
1046  */
1047 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1048 {
1049         assert(entity != NULL);
1050         union symconst_symbol sym;
1051         sym.entity_p = entity;
1052         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1053 }
1054
1055 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1056 {
1057         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1058 }
1059
1060 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1061                                    ir_mode *dest_mode)
1062 {
1063         if (is_Const(value)) {
1064                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1065         }
1066
1067         ir_node *cond       = new_d_Cond(dbgi, value);
1068         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1069         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1070         ir_node *tblock     = new_Block(1, &proj_true);
1071         ir_node *fblock     = new_Block(1, &proj_false);
1072         set_cur_block(tblock);
1073         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1074         ir_node *tjump  = new_Jmp();
1075         set_cur_block(fblock);
1076         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1077         ir_node *fjump  = new_Jmp();
1078
1079         ir_node *in[2]      = { tjump, fjump };
1080         ir_node *mergeblock = new_Block(2, in);
1081         set_cur_block(mergeblock);
1082         ir_node *phi_in[2]  = { const1, const0 };
1083         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1084         return phi;
1085 }
1086
1087 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1088 {
1089         ir_mode *value_mode = get_irn_mode(value);
1090
1091         if (value_mode == dest_mode)
1092                 return value;
1093
1094         if (dest_mode == mode_b) {
1095                 ir_node *zero = new_Const(get_mode_null(value_mode));
1096                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1097                 return cmp;
1098         } else if (value_mode == mode_b) {
1099                 return create_conv_from_b(dbgi, value, dest_mode);
1100         }
1101
1102         return new_d_Conv(dbgi, value, dest_mode);
1103 }
1104
1105 /**
1106  * Creates a SymConst node representing a wide string literal.
1107  *
1108  * @param literal   the wide string literal
1109  */
1110 static ir_node *wide_string_literal_to_firm(
1111                 const string_literal_expression_t *literal)
1112 {
1113         ir_type  *const global_type = get_glob_type();
1114         ir_type  *const elem_type   = ir_type_wchar_t;
1115         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1116         ir_type  *const type        = new_type_array(1, elem_type);
1117
1118         ident     *const id     = id_unique("str.%u");
1119         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1120         set_entity_ld_ident(entity, id);
1121         set_entity_visibility(entity, ir_visibility_private);
1122         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1123
1124         ir_mode      *const mode = get_type_mode(elem_type);
1125         const size_t        slen = wstrlen(&literal->value);
1126
1127         set_array_lower_bound_int(type, 0, 0);
1128         set_array_upper_bound_int(type, 0, slen);
1129         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1130         set_type_state(type, layout_fixed);
1131
1132         ir_initializer_t *initializer = create_initializer_compound(slen);
1133         const char              *p    = literal->value.begin;
1134         for (size_t i = 0; i < slen; ++i) {
1135                 assert(p < literal->value.begin + literal->value.size);
1136                 utf32             v   = read_utf8_char(&p);
1137                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1138                 ir_initializer_t *val = create_initializer_tarval(tv);
1139                 set_initializer_compound_value(initializer, i, val);
1140         }
1141         set_entity_initializer(entity, initializer);
1142
1143         return create_symconst(dbgi, entity);
1144 }
1145
1146 /**
1147  * Creates a SymConst node representing a string constant.
1148  *
1149  * @param src_pos    the source position of the string constant
1150  * @param id_prefix  a prefix for the name of the generated string constant
1151  * @param value      the value of the string constant
1152  */
1153 static ir_node *string_to_firm(const source_position_t *const src_pos,
1154                                const char *const id_prefix,
1155                                const string_t *const value)
1156 {
1157         ir_type  *const global_type = get_glob_type();
1158         dbg_info *const dbgi        = get_dbg_info(src_pos);
1159         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1160
1161         ident     *const id     = id_unique(id_prefix);
1162         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1163         set_entity_ld_ident(entity, id);
1164         set_entity_visibility(entity, ir_visibility_private);
1165         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1166
1167         ir_type *const elem_type = ir_type_const_char;
1168         ir_mode *const mode      = get_type_mode(elem_type);
1169
1170         const char* const string = value->begin;
1171         const size_t      slen   = value->size;
1172
1173         set_array_lower_bound_int(type, 0, 0);
1174         set_array_upper_bound_int(type, 0, slen);
1175         set_type_size_bytes(type, slen);
1176         set_type_state(type, layout_fixed);
1177
1178         ir_initializer_t *initializer = create_initializer_compound(slen);
1179         for (size_t i = 0; i < slen; ++i) {
1180                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1181                 ir_initializer_t *val = create_initializer_tarval(tv);
1182                 set_initializer_compound_value(initializer, i, val);
1183         }
1184         set_entity_initializer(entity, initializer);
1185
1186         return create_symconst(dbgi, entity);
1187 }
1188
1189 static bool try_create_integer(literal_expression_t *literal,
1190                                type_t *type, unsigned char base)
1191 {
1192         const char *string = literal->value.begin;
1193         size_t      size   = literal->value.size;
1194
1195         assert(type->kind == TYPE_ATOMIC);
1196         atomic_type_kind_t akind = type->atomic.akind;
1197
1198         ir_mode   *mode = atomic_modes[akind];
1199         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1200         if (tv == tarval_bad)
1201                 return false;
1202
1203         literal->base.type    = type;
1204         literal->target_value = tv;
1205         return true;
1206 }
1207
1208 static void create_integer_tarval(literal_expression_t *literal)
1209 {
1210         /* -1: signed only, 0: any, 1: unsigned only */
1211         int             sign   = literal->base.kind == EXPR_LITERAL_INTEGER ? -1 : 0;
1212         unsigned        ls     = 0;
1213         const string_t *suffix = &literal->suffix;
1214         /* parse suffix */
1215         if (suffix->size > 0) {
1216                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1217                         if (*c == 'u' || *c == 'U') sign = 1;
1218                         if (*c == 'l' || *c == 'L') { ++ls; }
1219                 }
1220         }
1221
1222         unsigned base;
1223         switch (literal->base.kind) {
1224                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1225                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1226                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1227                 default: panic("invalid literal kind");
1228         }
1229
1230         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1231
1232         /* now try if the constant is small enough for some types */
1233         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1234         if (ls < 1) {
1235                 if (sign <= 0 && try_create_integer(literal, type_int, base))
1236                         goto finished;
1237                 if (sign >= 0 && try_create_integer(literal, type_unsigned_int, base))
1238                         goto finished;
1239         }
1240         if (ls < 2) {
1241                 if (sign <= 0 && try_create_integer(literal, type_long, base))
1242                         goto finished;
1243                 if (sign >= 0 && try_create_integer(literal, type_unsigned_long, base))
1244                         goto finished;
1245         }
1246         /* last try? then we should not report tarval_bad */
1247         if (sign < 0)
1248                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1249         if (sign <= 0 && try_create_integer(literal, type_long_long, base))
1250                 goto finished;
1251
1252         /* last try */
1253         assert(sign >= 0);
1254         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1255         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1256         if (!res)
1257                 panic("internal error when parsing number literal");
1258
1259 finished:
1260         tarval_set_integer_overflow_mode(old_mode);
1261 }
1262
1263 void determine_literal_type(literal_expression_t *literal)
1264 {
1265         switch (literal->base.kind) {
1266         case EXPR_LITERAL_INTEGER:
1267         case EXPR_LITERAL_INTEGER_OCTAL:
1268         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1269                 create_integer_tarval(literal);
1270                 return;
1271         default:
1272                 break;
1273         }
1274 }
1275
1276 /**
1277  * Creates a Const node representing a constant.
1278  */
1279 static ir_node *literal_to_firm(const literal_expression_t *literal)
1280 {
1281         type_t     *type   = skip_typeref(literal->base.type);
1282         ir_mode    *mode   = get_ir_mode_storage(type);
1283         const char *string = literal->value.begin;
1284         size_t      size   = literal->value.size;
1285         ir_tarval  *tv;
1286
1287         switch (literal->base.kind) {
1288         case EXPR_LITERAL_WIDE_CHARACTER: {
1289                 utf32  v = read_utf8_char(&string);
1290                 char   buf[128];
1291                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1292
1293                 tv = new_tarval_from_str(buf, len, mode);
1294                 break;
1295         }
1296
1297         case EXPR_LITERAL_CHARACTER: {
1298                 long long int v;
1299                 bool char_is_signed
1300                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1301                 if (size == 1 && char_is_signed) {
1302                         v = (signed char)string[0];
1303                 } else {
1304                         v = 0;
1305                         for (size_t i = 0; i < size; ++i) {
1306                                 v = (v << 8) | ((unsigned char)string[i]);
1307                         }
1308                 }
1309                 char   buf[128];
1310                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1311
1312                 tv = new_tarval_from_str(buf, len, mode);
1313                 break;
1314         }
1315
1316         case EXPR_LITERAL_INTEGER:
1317         case EXPR_LITERAL_INTEGER_OCTAL:
1318         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1319                 assert(literal->target_value != NULL);
1320                 tv = literal->target_value;
1321                 break;
1322
1323         case EXPR_LITERAL_FLOATINGPOINT:
1324                 tv = new_tarval_from_str(string, size, mode);
1325                 break;
1326
1327         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1328                 char buffer[size + 2];
1329                 memcpy(buffer, "0x", 2);
1330                 memcpy(buffer+2, string, size);
1331                 tv = new_tarval_from_str(buffer, size+2, mode);
1332                 break;
1333         }
1334
1335         case EXPR_LITERAL_BOOLEAN:
1336                 if (string[0] == 't') {
1337                         tv = get_mode_one(mode);
1338                 } else {
1339                         assert(string[0] == 'f');
1340         case EXPR_LITERAL_MS_NOOP:
1341                         tv = get_mode_null(mode);
1342                 }
1343                 break;
1344
1345         default:
1346                 panic("Invalid literal kind found");
1347         }
1348
1349         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1350         ir_node  *res        = new_d_Const(dbgi, tv);
1351         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1352         return create_conv(dbgi, res, mode_arith);
1353 }
1354
1355 /*
1356  * Allocate an area of size bytes aligned at alignment
1357  * at a frame type.
1358  */
1359 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1360 {
1361         static unsigned area_cnt = 0;
1362         char buf[32];
1363
1364         ir_type *tp = new_type_array(1, ir_type_char);
1365         set_array_bounds_int(tp, 0, 0, size);
1366         set_type_alignment_bytes(tp, alignment);
1367
1368         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1369         ident *name = new_id_from_str(buf);
1370         ir_entity *area = new_entity(frame_type, name, tp);
1371
1372         /* mark this entity as compiler generated */
1373         set_entity_compiler_generated(area, 1);
1374         return area;
1375 }
1376
1377 /**
1378  * Return a node representing a trampoline region
1379  * for a given function entity.
1380  *
1381  * @param dbgi    debug info
1382  * @param entity  the function entity
1383  */
1384 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1385 {
1386         ir_entity *region = NULL;
1387         int        i;
1388
1389         if (current_trampolines != NULL) {
1390                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1391                         if (current_trampolines[i].function == entity) {
1392                                 region = current_trampolines[i].region;
1393                                 break;
1394                         }
1395                 }
1396         } else {
1397                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1398         }
1399         ir_graph *irg = current_ir_graph;
1400         if (region == NULL) {
1401                 /* create a new region */
1402                 ir_type           *frame_tp = get_irg_frame_type(irg);
1403                 trampoline_region  reg;
1404                 reg.function = entity;
1405
1406                 reg.region   = alloc_trampoline(frame_tp,
1407                                                 be_params->trampoline_size,
1408                                                 be_params->trampoline_align);
1409                 ARR_APP1(trampoline_region, current_trampolines, reg);
1410                 region = reg.region;
1411         }
1412         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1413                                region);
1414 }
1415
1416 /**
1417  * Creates a trampoline for a function represented by an entity.
1418  *
1419  * @param dbgi    debug info
1420  * @param mode    the (reference) mode for the function address
1421  * @param entity  the function entity
1422  */
1423 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1424                                   ir_entity *entity)
1425 {
1426         assert(entity != NULL);
1427         ir_node *in[3];
1428         in[0] = get_trampoline_region(dbgi, entity);
1429         in[1] = create_symconst(dbgi, entity);
1430         in[2] = get_irg_frame(current_ir_graph);
1431
1432         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1433         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1434         return new_Proj(irn, mode, pn_Builtin_max+1);
1435 }
1436
1437 /**
1438  * Dereference an address.
1439  *
1440  * @param dbgi  debug info
1441  * @param type  the type of the dereferenced result (the points_to type)
1442  * @param addr  the address to dereference
1443  */
1444 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1445                                       ir_node *const addr)
1446 {
1447         type_t *skipped = skip_typeref(type);
1448         if (is_type_incomplete(skipped))
1449                 return addr;
1450
1451         ir_type *irtype = get_ir_type(skipped);
1452         if (is_compound_type(irtype)
1453             || is_Method_type(irtype)
1454             || is_Array_type(irtype)) {
1455                 return addr;
1456         }
1457
1458         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1459                                   ? cons_volatile : cons_none;
1460         ir_mode *const mode     = get_type_mode(irtype);
1461         ir_node *const memory   = get_store();
1462         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1463         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1464         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1465
1466         set_store(load_mem);
1467
1468         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1469         return create_conv(dbgi, load_res, mode_arithmetic);
1470 }
1471
1472 /**
1473  * Creates a strict Conv (to the node's mode) if necessary.
1474  *
1475  * @param dbgi  debug info
1476  * @param node  the node to strict conv
1477  */
1478 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1479 {
1480         ir_mode *mode = get_irn_mode(node);
1481
1482         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1483                 return node;
1484         if (!mode_is_float(mode))
1485                 return node;
1486
1487         /* check if there is already a Conv */
1488         if (is_Conv(node)) {
1489                 /* convert it into a strict Conv */
1490                 set_Conv_strict(node, 1);
1491                 return node;
1492         }
1493
1494         /* otherwise create a new one */
1495         return new_d_strictConv(dbgi, node, mode);
1496 }
1497
1498 /**
1499  * Returns the correct base address depending on whether it is a parameter or a
1500  * normal local variable.
1501  */
1502 static ir_node *get_local_frame(ir_entity *const ent)
1503 {
1504         ir_graph      *const irg   = current_ir_graph;
1505         const ir_type *const owner = get_entity_owner(ent);
1506         if (owner == current_outer_frame) {
1507                 assert(current_static_link != NULL);
1508                 return current_static_link;
1509         } else {
1510                 return get_irg_frame(irg);
1511         }
1512 }
1513
1514 /**
1515  * Keep all memory edges of the given block.
1516  */
1517 static void keep_all_memory(ir_node *block)
1518 {
1519         ir_node *old = get_cur_block();
1520
1521         set_cur_block(block);
1522         keep_alive(get_store());
1523         /* TODO: keep all memory edges from restricted pointers */
1524         set_cur_block(old);
1525 }
1526
1527 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1528 {
1529         entity_t *entity = ref->entity;
1530         if (entity->enum_value.tv == NULL) {
1531                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1532                 assert(type->kind == TYPE_ENUM);
1533                 determine_enum_values(&type->enumt);
1534         }
1535
1536         return new_Const(entity->enum_value.tv);
1537 }
1538
1539 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1540 {
1541         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1542         entity_t *entity = ref->entity;
1543         assert(is_declaration(entity));
1544         type_t   *type   = skip_typeref(entity->declaration.type);
1545
1546         /* make sure the type is constructed */
1547         (void) get_ir_type(type);
1548
1549         if (entity->kind == ENTITY_FUNCTION
1550             && entity->function.btk != BUILTIN_NONE) {
1551                 ir_entity *irentity = get_function_entity(entity, NULL);
1552                 /* for gcc compatibility we have to produce (dummy) addresses for some
1553                  * builtins which don't have entities */
1554                 if (irentity == NULL) {
1555                         source_position_t const *const pos = &ref->base.source_position;
1556                         symbol_t          const *const sym = ref->entity->base.symbol;
1557                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1558
1559                         /* simply create a NULL pointer */
1560                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1561                         ir_node  *res  = new_Const(get_mode_null(mode));
1562
1563                         return res;
1564                 }
1565         }
1566
1567         switch ((declaration_kind_t) entity->declaration.kind) {
1568         case DECLARATION_KIND_UNKNOWN:
1569                 break;
1570
1571         case DECLARATION_KIND_LOCAL_VARIABLE: {
1572                 ir_mode *const mode  = get_ir_mode_storage(type);
1573                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1574                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1575         }
1576         case DECLARATION_KIND_PARAMETER: {
1577                 ir_mode *const mode  = get_ir_mode_storage(type);
1578                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1579                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1580         }
1581         case DECLARATION_KIND_FUNCTION: {
1582                 return create_symconst(dbgi, entity->function.irentity);
1583         }
1584         case DECLARATION_KIND_INNER_FUNCTION: {
1585                 ir_mode *const mode = get_ir_mode_storage(type);
1586                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1587                         /* inner function not using the closure */
1588                         return create_symconst(dbgi, entity->function.irentity);
1589                 } else {
1590                         /* need trampoline here */
1591                         return create_trampoline(dbgi, mode, entity->function.irentity);
1592                 }
1593         }
1594         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1595                 const variable_t *variable = &entity->variable;
1596                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1597                 return deref_address(dbgi, variable->base.type, addr);
1598         }
1599
1600         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1601                 ir_entity *irentity = entity->variable.v.entity;
1602                 ir_node   *frame    = get_local_frame(irentity);
1603                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1604                 return deref_address(dbgi, entity->declaration.type, sel);
1605         }
1606         case DECLARATION_KIND_PARAMETER_ENTITY: {
1607                 ir_entity *irentity = entity->parameter.v.entity;
1608                 ir_node   *frame    = get_local_frame(irentity);
1609                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1610                 return deref_address(dbgi, entity->declaration.type, sel);
1611         }
1612
1613         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1614                 return entity->variable.v.vla_base;
1615
1616         case DECLARATION_KIND_COMPOUND_MEMBER:
1617                 panic("not implemented reference type");
1618         }
1619
1620         panic("reference to declaration with unknown type found");
1621 }
1622
1623 static ir_node *reference_addr(const reference_expression_t *ref)
1624 {
1625         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1626         entity_t *entity = ref->entity;
1627         assert(is_declaration(entity));
1628
1629         switch((declaration_kind_t) entity->declaration.kind) {
1630         case DECLARATION_KIND_UNKNOWN:
1631                 break;
1632         case DECLARATION_KIND_PARAMETER:
1633         case DECLARATION_KIND_LOCAL_VARIABLE:
1634                 /* you can store to a local variable (so we don't panic but return NULL
1635                  * as an indicator for no real address) */
1636                 return NULL;
1637         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1638                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1639                 return addr;
1640         }
1641         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1642                 ir_entity *irentity = entity->variable.v.entity;
1643                 ir_node   *frame    = get_local_frame(irentity);
1644                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1645
1646                 return sel;
1647         }
1648         case DECLARATION_KIND_PARAMETER_ENTITY: {
1649                 ir_entity *irentity = entity->parameter.v.entity;
1650                 ir_node   *frame    = get_local_frame(irentity);
1651                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1652
1653                 return sel;
1654         }
1655
1656         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1657                 return entity->variable.v.vla_base;
1658
1659         case DECLARATION_KIND_FUNCTION: {
1660                 return create_symconst(dbgi, entity->function.irentity);
1661         }
1662
1663         case DECLARATION_KIND_INNER_FUNCTION: {
1664                 type_t  *const type = skip_typeref(entity->declaration.type);
1665                 ir_mode *const mode = get_ir_mode_storage(type);
1666                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1667                         /* inner function not using the closure */
1668                         return create_symconst(dbgi, entity->function.irentity);
1669                 } else {
1670                         /* need trampoline here */
1671                         return create_trampoline(dbgi, mode, entity->function.irentity);
1672                 }
1673         }
1674
1675         case DECLARATION_KIND_COMPOUND_MEMBER:
1676                 panic("not implemented reference type");
1677         }
1678
1679         panic("reference to declaration with unknown type found");
1680 }
1681
1682 /**
1683  * Transform calls to builtin functions.
1684  */
1685 static ir_node *process_builtin_call(const call_expression_t *call)
1686 {
1687         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1688
1689         assert(call->function->kind == EXPR_REFERENCE);
1690         reference_expression_t *builtin = &call->function->reference;
1691
1692         type_t *expr_type = skip_typeref(builtin->base.type);
1693         assert(is_type_pointer(expr_type));
1694
1695         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1696
1697         switch (builtin->entity->function.btk) {
1698         case BUILTIN_NONE:
1699                 break;
1700         case BUILTIN_ALLOCA: {
1701                 expression_t *argument = call->arguments->expression;
1702                 ir_node      *size     = expression_to_firm(argument);
1703
1704                 ir_node *store  = get_store();
1705                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1706                                               stack_alloc);
1707                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1708                 set_store(proj_m);
1709                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1710
1711                 return res;
1712         }
1713         case BUILTIN_INF: {
1714                 type_t    *type = function_type->function.return_type;
1715                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1716                 ir_tarval *tv   = get_mode_infinite(mode);
1717                 ir_node   *res  = new_d_Const(dbgi, tv);
1718                 return res;
1719         }
1720         case BUILTIN_NAN: {
1721                 /* Ignore string for now... */
1722                 assert(is_type_function(function_type));
1723                 type_t    *type = function_type->function.return_type;
1724                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1725                 ir_tarval *tv   = get_mode_NAN(mode);
1726                 ir_node   *res  = new_d_Const(dbgi, tv);
1727                 return res;
1728         }
1729         case BUILTIN_EXPECT: {
1730                 expression_t *argument = call->arguments->expression;
1731                 return _expression_to_firm(argument);
1732         }
1733         case BUILTIN_VA_END:
1734                 /* evaluate the argument of va_end for its side effects */
1735                 _expression_to_firm(call->arguments->expression);
1736                 return NULL;
1737         case BUILTIN_OBJECT_SIZE: {
1738                 /* determine value of "type" */
1739                 expression_t *type_expression = call->arguments->next->expression;
1740                 long          type_val        = fold_constant_to_int(type_expression);
1741                 type_t       *type            = function_type->function.return_type;
1742                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1743                 /* just produce a "I don't know" result */
1744                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1745                                                 get_mode_minus_one(mode);
1746
1747                 return new_d_Const(dbgi, result);
1748         }
1749         case BUILTIN_ROTL: {
1750                 ir_node *val  = expression_to_firm(call->arguments->expression);
1751                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1752                 ir_mode *mode = get_irn_mode(val);
1753                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1754                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1755         }
1756         case BUILTIN_ROTR: {
1757                 ir_node *val  = expression_to_firm(call->arguments->expression);
1758                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1759                 ir_mode *mode = get_irn_mode(val);
1760                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1761                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1762                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1763                 return new_d_Rotl(dbgi, val, sub, mode);
1764         }
1765         case BUILTIN_FIRM:
1766                 break;
1767         case BUILTIN_LIBC:
1768         case BUILTIN_LIBC_CHECK:
1769                 panic("builtin did not produce an entity");
1770         }
1771         panic("invalid builtin found");
1772 }
1773
1774 /**
1775  * Transform a call expression.
1776  * Handles some special cases, like alloca() calls, which must be resolved
1777  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1778  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1779  * handled right...
1780  */
1781 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1782 {
1783         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1784         assert(currently_reachable());
1785
1786         expression_t   *function = call->function;
1787         ir_node        *callee   = NULL;
1788         bool            firm_builtin = false;
1789         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1790         if (function->kind == EXPR_REFERENCE) {
1791                 const reference_expression_t *ref    = &function->reference;
1792                 entity_t                     *entity = ref->entity;
1793
1794                 if (entity->kind == ENTITY_FUNCTION) {
1795                         builtin_kind_t builtin = entity->function.btk;
1796                         if (builtin == BUILTIN_FIRM) {
1797                                 firm_builtin = true;
1798                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1799                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1800                                    && builtin != BUILTIN_LIBC_CHECK) {
1801                                 return process_builtin_call(call);
1802                         }
1803                 }
1804         }
1805         if (!firm_builtin)
1806                 callee = expression_to_firm(function);
1807
1808         type_t *type = skip_typeref(function->base.type);
1809         assert(is_type_pointer(type));
1810         pointer_type_t *pointer_type = &type->pointer;
1811         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1812         assert(is_type_function(points_to));
1813         function_type_t *function_type = &points_to->function;
1814
1815         int      n_parameters    = 0;
1816         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1817         ir_type *new_method_type = NULL;
1818         if (function_type->variadic || function_type->unspecified_parameters) {
1819                 const call_argument_t *argument = call->arguments;
1820                 for ( ; argument != NULL; argument = argument->next) {
1821                         ++n_parameters;
1822                 }
1823
1824                 /* we need to construct a new method type matching the call
1825                  * arguments... */
1826                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1827                 int n_res       = get_method_n_ress(ir_method_type);
1828                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1829                 set_method_calling_convention(new_method_type,
1830                                get_method_calling_convention(ir_method_type));
1831                 set_method_additional_properties(new_method_type,
1832                                get_method_additional_properties(ir_method_type));
1833                 set_method_variadicity(new_method_type,
1834                                        get_method_variadicity(ir_method_type));
1835
1836                 for (int i = 0; i < n_res; ++i) {
1837                         set_method_res_type(new_method_type, i,
1838                                             get_method_res_type(ir_method_type, i));
1839                 }
1840                 argument = call->arguments;
1841                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1842                         expression_t *expression = argument->expression;
1843                         ir_type      *irtype     = get_ir_type(expression->base.type);
1844                         set_method_param_type(new_method_type, i, irtype);
1845                 }
1846                 ir_method_type = new_method_type;
1847         } else {
1848                 n_parameters = get_method_n_params(ir_method_type);
1849         }
1850
1851         ir_node *in[n_parameters];
1852
1853         const call_argument_t *argument = call->arguments;
1854         for (int n = 0; n < n_parameters; ++n) {
1855                 expression_t *expression = argument->expression;
1856                 ir_node      *arg_node   = expression_to_firm(expression);
1857
1858                 type_t *arg_type = skip_typeref(expression->base.type);
1859                 if (!is_type_compound(arg_type)) {
1860                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1861                         arg_node = create_conv(dbgi, arg_node, mode);
1862                         arg_node = do_strict_conv(dbgi, arg_node);
1863                 }
1864
1865                 in[n] = arg_node;
1866
1867                 argument = argument->next;
1868         }
1869
1870         ir_node *store;
1871         if (function_type->modifiers & DM_CONST) {
1872                 store = get_irg_no_mem(current_ir_graph);
1873         } else {
1874                 store = get_store();
1875         }
1876
1877         ir_node *node;
1878         type_t  *return_type = skip_typeref(function_type->return_type);
1879         ir_node *result      = NULL;
1880         if (firm_builtin) {
1881                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1882                                      ir_method_type);
1883                 if (! (function_type->modifiers & DM_CONST)) {
1884                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1885                         set_store(mem);
1886                 }
1887
1888                 if (!is_type_void(return_type)) {
1889                         assert(is_type_scalar(return_type));
1890                         ir_mode *mode = get_ir_mode_storage(return_type);
1891                         result = new_Proj(node, mode, pn_Builtin_max+1);
1892                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1893                         result              = create_conv(NULL, result, mode_arith);
1894                 }
1895         } else {
1896                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1897                 if (! (function_type->modifiers & DM_CONST)) {
1898                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1899                         set_store(mem);
1900                 }
1901
1902                 if (!is_type_void(return_type)) {
1903                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1904                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1905                         result                    = new_Proj(resproj, mode, 0);
1906                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1907                         result                    = create_conv(NULL, result, mode_arith);
1908                 }
1909         }
1910
1911         if (function_type->modifiers & DM_NORETURN) {
1912                 /* A dead end:  Keep the Call and the Block.  Also place all further
1913                  * nodes into a new and unreachable block. */
1914                 keep_alive(node);
1915                 keep_alive(get_cur_block());
1916                 ir_node *block = new_Block(0, NULL);
1917                 set_cur_block(block);
1918         }
1919
1920         return result;
1921 }
1922
1923 static ir_node *statement_to_firm(statement_t *statement);
1924 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1925
1926 static ir_node *expression_to_addr(const expression_t *expression);
1927 static ir_node *create_condition_evaluation(const expression_t *expression,
1928                                             ir_node *true_block,
1929                                             ir_node *false_block);
1930
1931 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1932                          ir_node *value)
1933 {
1934         if (!is_type_compound(type)) {
1935                 ir_mode *mode = get_ir_mode_storage(type);
1936                 value         = create_conv(dbgi, value, mode);
1937                 value         = do_strict_conv(dbgi, value);
1938         }
1939
1940         ir_node *memory = get_store();
1941
1942         if (is_type_scalar(type)) {
1943                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1944                                       ? cons_volatile : cons_none;
1945                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1946                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1947                 set_store(store_mem);
1948         } else {
1949                 ir_type *irtype    = get_ir_type(type);
1950                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1951                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1952                 set_store(copyb_mem);
1953         }
1954 }
1955
1956 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1957 {
1958         ir_tarval *all_one   = get_mode_all_one(mode);
1959         int        mode_size = get_mode_size_bits(mode);
1960         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1961
1962         assert(offset >= 0);
1963         assert(size   >= 0);
1964         assert(offset + size <= mode_size);
1965         if (size == mode_size) {
1966                 return all_one;
1967         }
1968
1969         long       shiftr    = get_mode_size_bits(mode) - size;
1970         long       shiftl    = offset;
1971         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1972         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1973         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1974         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1975
1976         return mask1;
1977 }
1978
1979 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1980                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1981                 bool need_return)
1982 {
1983         ir_type *entity_type = get_entity_type(entity);
1984         ir_type *base_type   = get_primitive_base_type(entity_type);
1985         ir_mode *mode        = get_type_mode(base_type);
1986         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1987
1988         value = create_conv(dbgi, value, mode);
1989
1990         /* kill upper bits of value and shift to right position */
1991         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1992         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1993         unsigned  base_bits  = get_mode_size_bits(mode);
1994         unsigned  shiftwidth = base_bits - bitsize;
1995
1996         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1997         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1998
1999         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
2000         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
2001         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
2002
2003         /* load current value */
2004         ir_node   *mem             = get_store();
2005         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2006                                           set_volatile ? cons_volatile : cons_none);
2007         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2008         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2009         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2010         ir_tarval *inv_mask        = tarval_not(shift_mask);
2011         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2012         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2013
2014         /* construct new value and store */
2015         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2016         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2017                                          set_volatile ? cons_volatile : cons_none);
2018         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2019         set_store(store_mem);
2020
2021         if (!need_return)
2022                 return NULL;
2023
2024         ir_node *res_shr;
2025         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2026         if (mode_is_signed(mode)) {
2027                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2028         } else {
2029                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2030         }
2031         return res_shr;
2032 }
2033
2034 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2035                                          ir_node *addr)
2036 {
2037         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2038         entity_t *entity    = expression->compound_entry;
2039         type_t   *base_type = entity->declaration.type;
2040         ir_mode  *mode      = get_ir_mode_storage(base_type);
2041         ir_node  *mem       = get_store();
2042         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2043         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2044         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2045         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2046
2047         ir_mode  *amode     = mode;
2048         /* optimisation, since shifting in modes < machine_size is usually
2049          * less efficient */
2050         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2051                 amode = mode_uint;
2052         }
2053         unsigned amode_size = get_mode_size_bits(amode);
2054         load_res = create_conv(dbgi, load_res, amode);
2055
2056         set_store(load_mem);
2057
2058         /* kill upper bits */
2059         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2060         unsigned   bitoffset   = entity->compound_member.bit_offset;
2061         unsigned   bitsize     = entity->compound_member.bit_size;
2062         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2063         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2064         ir_node   *countl      = new_d_Const(dbgi, tvl);
2065         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2066
2067         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2068         assert(shift_bitsr <= amode_size);
2069         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2070         ir_node   *countr      = new_d_Const(dbgi, tvr);
2071         ir_node   *shiftr;
2072         if (mode_is_signed(mode)) {
2073                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2074         } else {
2075                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2076         }
2077
2078         type_t  *type    = expression->base.type;
2079         ir_mode *resmode = get_ir_mode_arithmetic(type);
2080         return create_conv(dbgi, shiftr, resmode);
2081 }
2082
2083 /* make sure the selected compound type is constructed */
2084 static void construct_select_compound(const select_expression_t *expression)
2085 {
2086         type_t *type = skip_typeref(expression->compound->base.type);
2087         if (is_type_pointer(type)) {
2088                 type = type->pointer.points_to;
2089         }
2090         (void) get_ir_type(type);
2091 }
2092
2093 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2094                                               ir_node *value, ir_node *addr)
2095 {
2096         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2097         type_t   *type = skip_typeref(expression->base.type);
2098
2099         if (!is_type_compound(type)) {
2100                 ir_mode  *mode = get_ir_mode_storage(type);
2101                 value          = create_conv(dbgi, value, mode);
2102                 value          = do_strict_conv(dbgi, value);
2103         }
2104
2105         if (expression->kind == EXPR_REFERENCE) {
2106                 const reference_expression_t *ref = &expression->reference;
2107
2108                 entity_t *entity = ref->entity;
2109                 assert(is_declaration(entity));
2110                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2111                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2112                         set_value(entity->variable.v.value_number, value);
2113                         return value;
2114                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2115                         set_value(entity->parameter.v.value_number, value);
2116                         return value;
2117                 }
2118         }
2119
2120         if (addr == NULL)
2121                 addr = expression_to_addr(expression);
2122         assert(addr != NULL);
2123
2124         if (expression->kind == EXPR_SELECT) {
2125                 const select_expression_t *select = &expression->select;
2126
2127                 construct_select_compound(select);
2128
2129                 entity_t *entity = select->compound_entry;
2130                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2131                 if (entity->compound_member.bitfield) {
2132                         ir_entity *irentity = entity->compound_member.entity;
2133                         bool       set_volatile
2134                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2135                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2136                                                        set_volatile, true);
2137                         return value;
2138                 }
2139         }
2140
2141         assign_value(dbgi, addr, type, value);
2142         return value;
2143 }
2144
2145 static void set_value_for_expression(const expression_t *expression,
2146                                      ir_node *value)
2147 {
2148         set_value_for_expression_addr(expression, value, NULL);
2149 }
2150
2151 static ir_node *get_value_from_lvalue(const expression_t *expression,
2152                                       ir_node *addr)
2153 {
2154         if (expression->kind == EXPR_REFERENCE) {
2155                 const reference_expression_t *ref = &expression->reference;
2156
2157                 entity_t *entity = ref->entity;
2158                 assert(entity->kind == ENTITY_VARIABLE
2159                                 || entity->kind == ENTITY_PARAMETER);
2160                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2161                 int value_number;
2162                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2163                         value_number = entity->variable.v.value_number;
2164                         assert(addr == NULL);
2165                         type_t  *type = skip_typeref(expression->base.type);
2166                         ir_mode *mode = get_ir_mode_storage(type);
2167                         ir_node *res  = get_value(value_number, mode);
2168                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2169                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2170                         value_number = entity->parameter.v.value_number;
2171                         assert(addr == NULL);
2172                         type_t  *type = skip_typeref(expression->base.type);
2173                         ir_mode *mode = get_ir_mode_storage(type);
2174                         ir_node *res  = get_value(value_number, mode);
2175                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2176                 }
2177         }
2178
2179         assert(addr != NULL);
2180         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2181
2182         ir_node *value;
2183         if (expression->kind == EXPR_SELECT &&
2184             expression->select.compound_entry->compound_member.bitfield) {
2185             construct_select_compound(&expression->select);
2186                 value = bitfield_extract_to_firm(&expression->select, addr);
2187         } else {
2188                 value = deref_address(dbgi, expression->base.type, addr);
2189         }
2190
2191         return value;
2192 }
2193
2194
2195 static ir_node *create_incdec(const unary_expression_t *expression)
2196 {
2197         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2198         const expression_t *value_expr = expression->value;
2199         ir_node            *addr       = expression_to_addr(value_expr);
2200         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2201
2202         type_t  *type = skip_typeref(expression->base.type);
2203         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2204
2205         ir_node *offset;
2206         if (is_type_pointer(type)) {
2207                 pointer_type_t *pointer_type = &type->pointer;
2208                 offset = get_type_size_node(pointer_type->points_to);
2209         } else {
2210                 assert(is_type_arithmetic(type));
2211                 offset = new_Const(get_mode_one(mode));
2212         }
2213
2214         ir_node *result;
2215         ir_node *store_value;
2216         switch(expression->base.kind) {
2217         case EXPR_UNARY_POSTFIX_INCREMENT:
2218                 result      = value;
2219                 store_value = new_d_Add(dbgi, value, offset, mode);
2220                 break;
2221         case EXPR_UNARY_POSTFIX_DECREMENT:
2222                 result      = value;
2223                 store_value = new_d_Sub(dbgi, value, offset, mode);
2224                 break;
2225         case EXPR_UNARY_PREFIX_INCREMENT:
2226                 result      = new_d_Add(dbgi, value, offset, mode);
2227                 store_value = result;
2228                 break;
2229         case EXPR_UNARY_PREFIX_DECREMENT:
2230                 result      = new_d_Sub(dbgi, value, offset, mode);
2231                 store_value = result;
2232                 break;
2233         default:
2234                 panic("no incdec expr in create_incdec");
2235         }
2236
2237         set_value_for_expression_addr(value_expr, store_value, addr);
2238
2239         return result;
2240 }
2241
2242 static bool is_local_variable(expression_t *expression)
2243 {
2244         if (expression->kind != EXPR_REFERENCE)
2245                 return false;
2246         reference_expression_t *ref_expr = &expression->reference;
2247         entity_t               *entity   = ref_expr->entity;
2248         if (entity->kind != ENTITY_VARIABLE)
2249                 return false;
2250         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2251         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2252 }
2253
2254 static ir_relation get_relation(const expression_kind_t kind)
2255 {
2256         switch(kind) {
2257         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2258         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2259         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2260         case EXPR_BINARY_ISLESS:
2261         case EXPR_BINARY_LESS:          return ir_relation_less;
2262         case EXPR_BINARY_ISLESSEQUAL:
2263         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2264         case EXPR_BINARY_ISGREATER:
2265         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2266         case EXPR_BINARY_ISGREATEREQUAL:
2267         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2268         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2269
2270         default:
2271                 break;
2272         }
2273         panic("trying to get pn_Cmp from non-comparison binexpr type");
2274 }
2275
2276 /**
2277  * Handle the assume optimizer hint: check if a Confirm
2278  * node can be created.
2279  *
2280  * @param dbi    debug info
2281  * @param expr   the IL assume expression
2282  *
2283  * we support here only some simple cases:
2284  *  - var rel const
2285  *  - const rel val
2286  *  - var rel var
2287  */
2288 static ir_node *handle_assume_compare(dbg_info *dbi,
2289                                       const binary_expression_t *expression)
2290 {
2291         expression_t *op1 = expression->left;
2292         expression_t *op2 = expression->right;
2293         entity_t     *var2, *var = NULL;
2294         ir_node      *res      = NULL;
2295         ir_relation   relation = get_relation(expression->base.kind);
2296
2297         if (is_local_variable(op1) && is_local_variable(op2)) {
2298                 var  = op1->reference.entity;
2299             var2 = op2->reference.entity;
2300
2301                 type_t  *const type = skip_typeref(var->declaration.type);
2302                 ir_mode *const mode = get_ir_mode_storage(type);
2303
2304                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2305                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2306
2307                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2308                 set_value(var2->variable.v.value_number, res);
2309
2310                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2311                 set_value(var->variable.v.value_number, res);
2312
2313                 return res;
2314         }
2315
2316         expression_t *con = NULL;
2317         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2318                 var = op1->reference.entity;
2319                 con = op2;
2320         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2321                 relation = get_inversed_relation(relation);
2322                 var = op2->reference.entity;
2323                 con = op1;
2324         }
2325
2326         if (var != NULL) {
2327                 type_t  *const type = skip_typeref(var->declaration.type);
2328                 ir_mode *const mode = get_ir_mode_storage(type);
2329
2330                 res = get_value(var->variable.v.value_number, mode);
2331                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2332                 set_value(var->variable.v.value_number, res);
2333         }
2334         return res;
2335 }
2336
2337 /**
2338  * Handle the assume optimizer hint.
2339  *
2340  * @param dbi    debug info
2341  * @param expr   the IL assume expression
2342  */
2343 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2344 {
2345         switch(expression->kind) {
2346         case EXPR_BINARY_EQUAL:
2347         case EXPR_BINARY_NOTEQUAL:
2348         case EXPR_BINARY_LESS:
2349         case EXPR_BINARY_LESSEQUAL:
2350         case EXPR_BINARY_GREATER:
2351         case EXPR_BINARY_GREATEREQUAL:
2352                 return handle_assume_compare(dbi, &expression->binary);
2353         default:
2354                 return NULL;
2355         }
2356 }
2357
2358 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2359                             type_t *from_type, type_t *type)
2360 {
2361         type = skip_typeref(type);
2362         if (is_type_void(type)) {
2363                 /* make sure firm type is constructed */
2364                 (void) get_ir_type(type);
2365                 return NULL;
2366         }
2367         if (!is_type_scalar(type)) {
2368                 /* make sure firm type is constructed */
2369                 (void) get_ir_type(type);
2370                 return value_node;
2371         }
2372
2373         from_type     = skip_typeref(from_type);
2374         ir_mode *mode = get_ir_mode_storage(type);
2375         /* check for conversion from / to __based types */
2376         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2377                 const variable_t *from_var = from_type->pointer.base_variable;
2378                 const variable_t *to_var   = type->pointer.base_variable;
2379                 if (from_var != to_var) {
2380                         if (from_var != NULL) {
2381                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2382                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2383                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2384                         }
2385                         if (to_var != NULL) {
2386                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2387                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2388                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2389                         }
2390                 }
2391         }
2392
2393         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2394                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2395                  * convert to mode_b so we only get a 0/1 value */
2396                 value_node = create_conv(dbgi, value_node, mode_b);
2397         }
2398
2399         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2400         ir_node *node       = create_conv(dbgi, value_node, mode);
2401         node                = do_strict_conv(dbgi, node);
2402         node                = create_conv(dbgi, node, mode_arith);
2403
2404         return node;
2405 }
2406
2407 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2408 {
2409         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2410         type_t   *type = skip_typeref(expression->base.type);
2411
2412         const expression_t *value = expression->value;
2413
2414         switch(expression->base.kind) {
2415         case EXPR_UNARY_TAKE_ADDRESS:
2416                 return expression_to_addr(value);
2417
2418         case EXPR_UNARY_NEGATE: {
2419                 ir_node *value_node = expression_to_firm(value);
2420                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2421                 return new_d_Minus(dbgi, value_node, mode);
2422         }
2423         case EXPR_UNARY_PLUS:
2424                 return expression_to_firm(value);
2425         case EXPR_UNARY_BITWISE_NEGATE: {
2426                 ir_node *value_node = expression_to_firm(value);
2427                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2428                 return new_d_Not(dbgi, value_node, mode);
2429         }
2430         case EXPR_UNARY_NOT: {
2431                 ir_node *value_node = _expression_to_firm(value);
2432                 value_node          = create_conv(dbgi, value_node, mode_b);
2433                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2434                 return res;
2435         }
2436         case EXPR_UNARY_DEREFERENCE: {
2437                 ir_node *value_node = expression_to_firm(value);
2438                 type_t  *value_type = skip_typeref(value->base.type);
2439                 assert(is_type_pointer(value_type));
2440
2441                 /* check for __based */
2442                 const variable_t *const base_var = value_type->pointer.base_variable;
2443                 if (base_var != NULL) {
2444                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2445                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2446                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2447                 }
2448                 type_t  *points_to  = value_type->pointer.points_to;
2449                 return deref_address(dbgi, points_to, value_node);
2450         }
2451         case EXPR_UNARY_POSTFIX_INCREMENT:
2452         case EXPR_UNARY_POSTFIX_DECREMENT:
2453         case EXPR_UNARY_PREFIX_INCREMENT:
2454         case EXPR_UNARY_PREFIX_DECREMENT:
2455                 return create_incdec(expression);
2456         case EXPR_UNARY_CAST: {
2457                 ir_node *value_node = expression_to_firm(value);
2458                 type_t  *from_type  = value->base.type;
2459                 return create_cast(dbgi, value_node, from_type, type);
2460         }
2461         case EXPR_UNARY_ASSUME:
2462                 return handle_assume(dbgi, value);
2463
2464         default:
2465                 break;
2466         }
2467         panic("invalid UNEXPR type found");
2468 }
2469
2470 /**
2471  * produces a 0/1 depending of the value of a mode_b node
2472  */
2473 static ir_node *produce_condition_result(const expression_t *expression,
2474                                          ir_mode *mode, dbg_info *dbgi)
2475 {
2476         ir_node *const one_block  = new_immBlock();
2477         ir_node *const zero_block = new_immBlock();
2478         create_condition_evaluation(expression, one_block, zero_block);
2479         mature_immBlock(one_block);
2480         mature_immBlock(zero_block);
2481
2482         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2483         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2484         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2485         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2486         set_cur_block(block);
2487
2488         ir_node *const one   = new_Const(get_mode_one(mode));
2489         ir_node *const zero  = new_Const(get_mode_null(mode));
2490         ir_node *const in[2] = { one, zero };
2491         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2492
2493         return val;
2494 }
2495
2496 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2497                 ir_node *value, type_t *type)
2498 {
2499         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2500         assert(is_type_pointer(type));
2501         pointer_type_t *const pointer_type = &type->pointer;
2502         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2503         ir_node        *      elem_size    = get_type_size_node(points_to);
2504         elem_size                          = create_conv(dbgi, elem_size, mode);
2505         value                              = create_conv(dbgi, value,     mode);
2506         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2507         return mul;
2508 }
2509
2510 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2511                           ir_node *left, ir_node *right)
2512 {
2513         ir_mode  *mode;
2514         type_t   *type_left  = skip_typeref(expression->left->base.type);
2515         type_t   *type_right = skip_typeref(expression->right->base.type);
2516
2517         expression_kind_t kind = expression->base.kind;
2518
2519         switch (kind) {
2520         case EXPR_BINARY_SHIFTLEFT:
2521         case EXPR_BINARY_SHIFTRIGHT:
2522         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2523         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2524                 mode  = get_ir_mode_arithmetic(expression->base.type);
2525                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2526                 break;
2527
2528         case EXPR_BINARY_SUB:
2529                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2530                         const pointer_type_t *const ptr_type = &type_left->pointer;
2531
2532                         mode = get_ir_mode_arithmetic(expression->base.type);
2533                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2534                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2535                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2536                         ir_node *const no_mem    = new_NoMem();
2537                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2538                                                                                                    mode, op_pin_state_floats);
2539                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2540                 }
2541                 /* fallthrough */
2542         case EXPR_BINARY_SUB_ASSIGN:
2543                 if (is_type_pointer(type_left)) {
2544                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2545                         mode  = get_ir_mode_arithmetic(type_left);
2546                         break;
2547                 }
2548                 goto normal_node;
2549
2550         case EXPR_BINARY_ADD:
2551         case EXPR_BINARY_ADD_ASSIGN:
2552                 if (is_type_pointer(type_left)) {
2553                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2554                         mode  = get_ir_mode_arithmetic(type_left);
2555                         break;
2556                 } else if (is_type_pointer(type_right)) {
2557                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2558                         mode  = get_ir_mode_arithmetic(type_right);
2559                         break;
2560                 }
2561                 goto normal_node;
2562
2563         default:
2564 normal_node:
2565                 mode = get_ir_mode_arithmetic(type_right);
2566                 left = create_conv(dbgi, left, mode);
2567                 break;
2568         }
2569
2570         switch (kind) {
2571         case EXPR_BINARY_ADD_ASSIGN:
2572         case EXPR_BINARY_ADD:
2573                 return new_d_Add(dbgi, left, right, mode);
2574         case EXPR_BINARY_SUB_ASSIGN:
2575         case EXPR_BINARY_SUB:
2576                 return new_d_Sub(dbgi, left, right, mode);
2577         case EXPR_BINARY_MUL_ASSIGN:
2578         case EXPR_BINARY_MUL:
2579                 return new_d_Mul(dbgi, left, right, mode);
2580         case EXPR_BINARY_BITWISE_AND:
2581         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2582                 return new_d_And(dbgi, left, right, mode);
2583         case EXPR_BINARY_BITWISE_OR:
2584         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2585                 return new_d_Or(dbgi, left, right, mode);
2586         case EXPR_BINARY_BITWISE_XOR:
2587         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2588                 return new_d_Eor(dbgi, left, right, mode);
2589         case EXPR_BINARY_SHIFTLEFT:
2590         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2591                 return new_d_Shl(dbgi, left, right, mode);
2592         case EXPR_BINARY_SHIFTRIGHT:
2593         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2594                 if (mode_is_signed(mode)) {
2595                         return new_d_Shrs(dbgi, left, right, mode);
2596                 } else {
2597                         return new_d_Shr(dbgi, left, right, mode);
2598                 }
2599         case EXPR_BINARY_DIV:
2600         case EXPR_BINARY_DIV_ASSIGN: {
2601                 ir_node *pin = new_Pin(new_NoMem());
2602                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2603                                          op_pin_state_floats);
2604                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2605                 return res;
2606         }
2607         case EXPR_BINARY_MOD:
2608         case EXPR_BINARY_MOD_ASSIGN: {
2609                 ir_node *pin = new_Pin(new_NoMem());
2610                 assert(!mode_is_float(mode));
2611                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2612                                          op_pin_state_floats);
2613                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2614                 return res;
2615         }
2616         default:
2617                 panic("unexpected expression kind");
2618         }
2619 }
2620
2621 static ir_node *create_lazy_op(const binary_expression_t *expression)
2622 {
2623         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2624         type_t   *type = skip_typeref(expression->base.type);
2625         ir_mode  *mode = get_ir_mode_arithmetic(type);
2626
2627         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2628                 bool val = fold_constant_to_bool(expression->left);
2629                 expression_kind_t ekind = expression->base.kind;
2630                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2631                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2632                         if (!val) {
2633                                 return new_Const(get_mode_null(mode));
2634                         }
2635                 } else {
2636                         if (val) {
2637                                 return new_Const(get_mode_one(mode));
2638                         }
2639                 }
2640
2641                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2642                         bool valr = fold_constant_to_bool(expression->right);
2643                         return create_Const_from_bool(mode, valr);
2644                 }
2645
2646                 return produce_condition_result(expression->right, mode, dbgi);
2647         }
2648
2649         return produce_condition_result((const expression_t*) expression, mode,
2650                                         dbgi);
2651 }
2652
2653 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2654                                             ir_node *right, ir_mode *mode);
2655
2656 static ir_node *create_assign_binop(const binary_expression_t *expression)
2657 {
2658         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2659         const expression_t *left_expr = expression->left;
2660         type_t             *type      = skip_typeref(left_expr->base.type);
2661         ir_node            *right     = expression_to_firm(expression->right);
2662         ir_node            *left_addr = expression_to_addr(left_expr);
2663         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2664         ir_node            *result    = create_op(dbgi, expression, left, right);
2665
2666         result = create_cast(dbgi, result, expression->right->base.type, type);
2667         result = do_strict_conv(dbgi, result);
2668
2669         result = set_value_for_expression_addr(left_expr, result, left_addr);
2670
2671         if (!is_type_compound(type)) {
2672                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2673                 result = create_conv(dbgi, result, mode_arithmetic);
2674         }
2675         return result;
2676 }
2677
2678 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2679 {
2680         expression_kind_t kind = expression->base.kind;
2681
2682         switch(kind) {
2683         case EXPR_BINARY_EQUAL:
2684         case EXPR_BINARY_NOTEQUAL:
2685         case EXPR_BINARY_LESS:
2686         case EXPR_BINARY_LESSEQUAL:
2687         case EXPR_BINARY_GREATER:
2688         case EXPR_BINARY_GREATEREQUAL:
2689         case EXPR_BINARY_ISGREATER:
2690         case EXPR_BINARY_ISGREATEREQUAL:
2691         case EXPR_BINARY_ISLESS:
2692         case EXPR_BINARY_ISLESSEQUAL:
2693         case EXPR_BINARY_ISLESSGREATER:
2694         case EXPR_BINARY_ISUNORDERED: {
2695                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2696                 ir_node    *left     = expression_to_firm(expression->left);
2697                 ir_node    *right    = expression_to_firm(expression->right);
2698                 ir_relation relation = get_relation(kind);
2699                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2700                 return cmp;
2701         }
2702         case EXPR_BINARY_ASSIGN: {
2703                 ir_node *addr  = expression_to_addr(expression->left);
2704                 ir_node *right = expression_to_firm(expression->right);
2705                 ir_node *res
2706                         = set_value_for_expression_addr(expression->left, right, addr);
2707
2708                 type_t  *type            = skip_typeref(expression->base.type);
2709                 if (!is_type_compound(type)) {
2710                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2711                         res                      = create_conv(NULL, res, mode_arithmetic);
2712                 }
2713                 return res;
2714         }
2715         case EXPR_BINARY_ADD:
2716         case EXPR_BINARY_SUB:
2717         case EXPR_BINARY_MUL:
2718         case EXPR_BINARY_DIV:
2719         case EXPR_BINARY_MOD:
2720         case EXPR_BINARY_BITWISE_AND:
2721         case EXPR_BINARY_BITWISE_OR:
2722         case EXPR_BINARY_BITWISE_XOR:
2723         case EXPR_BINARY_SHIFTLEFT:
2724         case EXPR_BINARY_SHIFTRIGHT:
2725         {
2726                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2727                 ir_node  *left  = expression_to_firm(expression->left);
2728                 ir_node  *right = expression_to_firm(expression->right);
2729                 return create_op(dbgi, expression, left, right);
2730         }
2731         case EXPR_BINARY_LOGICAL_AND:
2732         case EXPR_BINARY_LOGICAL_OR:
2733                 return create_lazy_op(expression);
2734         case EXPR_BINARY_COMMA:
2735                 /* create side effects of left side */
2736                 (void) expression_to_firm(expression->left);
2737                 return _expression_to_firm(expression->right);
2738
2739         case EXPR_BINARY_ADD_ASSIGN:
2740         case EXPR_BINARY_SUB_ASSIGN:
2741         case EXPR_BINARY_MUL_ASSIGN:
2742         case EXPR_BINARY_MOD_ASSIGN:
2743         case EXPR_BINARY_DIV_ASSIGN:
2744         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2745         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2746         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2747         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2748         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2749                 return create_assign_binop(expression);
2750         default:
2751                 panic("TODO binexpr type");
2752         }
2753 }
2754
2755 static ir_node *array_access_addr(const array_access_expression_t *expression)
2756 {
2757         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2758         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2759         ir_node  *offset      = expression_to_firm(expression->index);
2760         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2761         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2762         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2763
2764         return result;
2765 }
2766
2767 static ir_node *array_access_to_firm(
2768                 const array_access_expression_t *expression)
2769 {
2770         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2771         ir_node  *addr   = array_access_addr(expression);
2772         type_t   *type   = revert_automatic_type_conversion(
2773                         (const expression_t*) expression);
2774         type             = skip_typeref(type);
2775
2776         return deref_address(dbgi, type, addr);
2777 }
2778
2779 static long get_offsetof_offset(const offsetof_expression_t *expression)
2780 {
2781         type_t *orig_type = expression->type;
2782         long    offset    = 0;
2783
2784         designator_t *designator = expression->designator;
2785         for ( ; designator != NULL; designator = designator->next) {
2786                 type_t *type = skip_typeref(orig_type);
2787                 /* be sure the type is constructed */
2788                 (void) get_ir_type(type);
2789
2790                 if (designator->symbol != NULL) {
2791                         assert(is_type_compound(type));
2792                         symbol_t *symbol = designator->symbol;
2793
2794                         compound_t *compound = type->compound.compound;
2795                         entity_t   *iter     = compound->members.entities;
2796                         for ( ; iter != NULL; iter = iter->base.next) {
2797                                 if (iter->base.symbol == symbol) {
2798                                         break;
2799                                 }
2800                         }
2801                         assert(iter != NULL);
2802
2803                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2804                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2805                         offset += get_entity_offset(iter->compound_member.entity);
2806
2807                         orig_type = iter->declaration.type;
2808                 } else {
2809                         expression_t *array_index = designator->array_index;
2810                         assert(designator->array_index != NULL);
2811                         assert(is_type_array(type));
2812
2813                         long index         = fold_constant_to_int(array_index);
2814                         ir_type *arr_type  = get_ir_type(type);
2815                         ir_type *elem_type = get_array_element_type(arr_type);
2816                         long     elem_size = get_type_size_bytes(elem_type);
2817
2818                         offset += index * elem_size;
2819
2820                         orig_type = type->array.element_type;
2821                 }
2822         }
2823
2824         return offset;
2825 }
2826
2827 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2828 {
2829         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2830         long       offset = get_offsetof_offset(expression);
2831         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2832         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2833
2834         return new_d_Const(dbgi, tv);
2835 }
2836
2837 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2838                                      ir_entity *entity, type_t *type);
2839 static ir_initializer_t *create_ir_initializer(
2840                 const initializer_t *initializer, type_t *type);
2841
2842 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2843                                             initializer_t *initializer,
2844                                             type_t *type)
2845 {
2846         /* create the ir_initializer */
2847         ir_graph *const old_current_ir_graph = current_ir_graph;
2848         current_ir_graph = get_const_code_irg();
2849
2850         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2851
2852         assert(current_ir_graph == get_const_code_irg());
2853         current_ir_graph = old_current_ir_graph;
2854
2855         ident     *const id          = id_unique("initializer.%u");
2856         ir_type   *const irtype      = get_ir_type(type);
2857         ir_type   *const global_type = get_glob_type();
2858         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2859         set_entity_ld_ident(entity, id);
2860         set_entity_visibility(entity, ir_visibility_private);
2861         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2862         set_entity_initializer(entity, irinitializer);
2863         return entity;
2864 }
2865
2866 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2867 {
2868         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2869         type_t        *type        = expression->type;
2870         initializer_t *initializer = expression->initializer;
2871
2872         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2873                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2874                 return create_symconst(dbgi, entity);
2875         } else {
2876                 /* create an entity on the stack */
2877                 ident   *const id     = id_unique("CompLit.%u");
2878                 ir_type *const irtype = get_ir_type(type);
2879                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2880
2881                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2882                 set_entity_ld_ident(entity, id);
2883
2884                 /* create initialisation code */
2885                 create_local_initializer(initializer, dbgi, entity, type);
2886
2887                 /* create a sel for the compound literal address */
2888                 ir_node *frame = get_irg_frame(current_ir_graph);
2889                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2890                 return sel;
2891         }
2892 }
2893
2894 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2895 {
2896         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2897         type_t   *const type = expr->type;
2898         ir_node  *const addr = compound_literal_addr(expr);
2899         return deref_address(dbgi, type, addr);
2900 }
2901
2902 /**
2903  * Transform a sizeof expression into Firm code.
2904  */
2905 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2906 {
2907         type_t *const type = skip_typeref(expression->type);
2908         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2909         if (is_type_array(type) && type->array.is_vla
2910                         && expression->tp_expression != NULL) {
2911                 expression_to_firm(expression->tp_expression);
2912         }
2913
2914         return get_type_size_node(type);
2915 }
2916
2917 static entity_t *get_expression_entity(const expression_t *expression)
2918 {
2919         if (expression->kind != EXPR_REFERENCE)
2920                 return NULL;
2921
2922         return expression->reference.entity;
2923 }
2924
2925 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2926 {
2927         switch(entity->kind) {
2928         case DECLARATION_KIND_CASES:
2929                 return entity->declaration.alignment;
2930         case ENTITY_STRUCT:
2931         case ENTITY_UNION:
2932                 return entity->compound.alignment;
2933         case ENTITY_TYPEDEF:
2934                 return entity->typedefe.alignment;
2935         default:
2936                 break;
2937         }
2938         return 0;
2939 }
2940
2941 /**
2942  * Transform an alignof expression into Firm code.
2943  */
2944 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2945 {
2946         unsigned alignment = 0;
2947
2948         const expression_t *tp_expression = expression->tp_expression;
2949         if (tp_expression != NULL) {
2950                 entity_t *entity = get_expression_entity(tp_expression);
2951                 if (entity != NULL) {
2952                         alignment = get_cparser_entity_alignment(entity);
2953                 }
2954         }
2955
2956         if (alignment == 0) {
2957                 type_t *type = expression->type;
2958                 alignment = get_type_alignment(type);
2959         }
2960
2961         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2962         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2963         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2964         return new_d_Const(dbgi, tv);
2965 }
2966
2967 static void init_ir_types(void);
2968
2969 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2970 {
2971         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2972
2973         bool constant_folding_old = constant_folding;
2974         constant_folding = true;
2975         int old_optimize         = get_optimize();
2976         int old_constant_folding = get_opt_constant_folding();
2977         set_optimize(1);
2978         set_opt_constant_folding(1);
2979
2980         init_ir_types();
2981
2982         ir_graph *old_current_ir_graph = current_ir_graph;
2983         current_ir_graph = get_const_code_irg();
2984
2985         ir_node *const cnst = _expression_to_firm(expression);
2986
2987         current_ir_graph = old_current_ir_graph;
2988         set_optimize(old_optimize);
2989         set_opt_constant_folding(old_constant_folding);
2990
2991         if (!is_Const(cnst)) {
2992                 panic("couldn't fold constant");
2993         }
2994
2995         constant_folding = constant_folding_old;
2996
2997         ir_tarval *const tv   = get_Const_tarval(cnst);
2998         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2999         return tarval_convert_to(tv, mode);
3000 }
3001
3002 /* this function is only used in parser.c, but it relies on libfirm functionality */
3003 bool constant_is_negative(const expression_t *expression)
3004 {
3005         ir_tarval *tv = fold_constant_to_tarval(expression);
3006         return tarval_is_negative(tv);
3007 }
3008
3009 long fold_constant_to_int(const expression_t *expression)
3010 {
3011         ir_tarval *tv = fold_constant_to_tarval(expression);
3012         if (!tarval_is_long(tv)) {
3013                 panic("result of constant folding is not integer");
3014         }
3015
3016         return get_tarval_long(tv);
3017 }
3018
3019 bool fold_constant_to_bool(const expression_t *expression)
3020 {
3021         ir_tarval *tv = fold_constant_to_tarval(expression);
3022         return !tarval_is_null(tv);
3023 }
3024
3025 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3026 {
3027         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3028
3029         /* first try to fold a constant condition */
3030         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3031                 bool val = fold_constant_to_bool(expression->condition);
3032                 if (val) {
3033                         expression_t *true_expression = expression->true_expression;
3034                         if (true_expression == NULL)
3035                                 true_expression = expression->condition;
3036                         return expression_to_firm(true_expression);
3037                 } else {
3038                         return expression_to_firm(expression->false_expression);
3039                 }
3040         }
3041
3042         ir_node *const true_block  = new_immBlock();
3043         ir_node *const false_block = new_immBlock();
3044         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3045         mature_immBlock(true_block);
3046         mature_immBlock(false_block);
3047
3048         set_cur_block(true_block);
3049         ir_node *true_val;
3050         if (expression->true_expression != NULL) {
3051                 true_val = expression_to_firm(expression->true_expression);
3052         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3053                 true_val = cond_expr;
3054         } else {
3055                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3056                  * comparison.  Generate a "1" as value for the true branch. */
3057                 true_val = new_Const(get_mode_one(mode_Is));
3058         }
3059         ir_node *const true_jmp = new_d_Jmp(dbgi);
3060
3061         set_cur_block(false_block);
3062         ir_node *const false_val = expression_to_firm(expression->false_expression);
3063         ir_node *const false_jmp = new_d_Jmp(dbgi);
3064
3065         /* create the common block */
3066         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3067         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3068         set_cur_block(block);
3069
3070         /* TODO improve static semantics, so either both or no values are NULL */
3071         if (true_val == NULL || false_val == NULL)
3072                 return NULL;
3073
3074         ir_node *const in[2] = { true_val, false_val };
3075         type_t  *const type  = skip_typeref(expression->base.type);
3076         ir_mode *const mode  = get_ir_mode_arithmetic(type);
3077         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3078
3079         return val;
3080 }
3081
3082 /**
3083  * Returns an IR-node representing the address of a field.
3084  */
3085 static ir_node *select_addr(const select_expression_t *expression)
3086 {
3087         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3088
3089         construct_select_compound(expression);
3090
3091         ir_node *compound_addr = expression_to_firm(expression->compound);
3092
3093         entity_t *entry = expression->compound_entry;
3094         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3095         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3096
3097         if (constant_folding) {
3098                 ir_mode *mode      = get_irn_mode(compound_addr);
3099                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3100                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3101                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3102         } else {
3103                 ir_entity *irentity = entry->compound_member.entity;
3104                 assert(irentity != NULL);
3105                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3106         }
3107 }
3108
3109 static ir_node *select_to_firm(const select_expression_t *expression)
3110 {
3111         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3112         ir_node  *addr = select_addr(expression);
3113         type_t   *type = revert_automatic_type_conversion(
3114                         (const expression_t*) expression);
3115         type           = skip_typeref(type);
3116
3117         entity_t *entry = expression->compound_entry;
3118         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3119
3120         if (entry->compound_member.bitfield) {
3121                 return bitfield_extract_to_firm(expression, addr);
3122         }
3123
3124         return deref_address(dbgi, type, addr);
3125 }
3126
3127 /* Values returned by __builtin_classify_type. */
3128 typedef enum gcc_type_class
3129 {
3130         no_type_class = -1,
3131         void_type_class,
3132         integer_type_class,
3133         char_type_class,
3134         enumeral_type_class,
3135         boolean_type_class,
3136         pointer_type_class,
3137         reference_type_class,
3138         offset_type_class,
3139         real_type_class,
3140         complex_type_class,
3141         function_type_class,
3142         method_type_class,
3143         record_type_class,
3144         union_type_class,
3145         array_type_class,
3146         string_type_class,
3147         set_type_class,
3148         file_type_class,
3149         lang_type_class
3150 } gcc_type_class;
3151
3152 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3153 {
3154         type_t *type = expr->type_expression->base.type;
3155
3156         /* FIXME gcc returns different values depending on whether compiling C or C++
3157          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3158         gcc_type_class tc;
3159         for (;;) {
3160                 type = skip_typeref(type);
3161                 switch (type->kind) {
3162                         case TYPE_ATOMIC: {
3163                                 const atomic_type_t *const atomic_type = &type->atomic;
3164                                 switch (atomic_type->akind) {
3165                                         /* should not be reached */
3166                                         case ATOMIC_TYPE_INVALID:
3167                                                 tc = no_type_class;
3168                                                 goto make_const;
3169
3170                                         /* gcc cannot do that */
3171                                         case ATOMIC_TYPE_VOID:
3172                                                 tc = void_type_class;
3173                                                 goto make_const;
3174
3175                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3176                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3177                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3178                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3179                                         case ATOMIC_TYPE_SHORT:
3180                                         case ATOMIC_TYPE_USHORT:
3181                                         case ATOMIC_TYPE_INT:
3182                                         case ATOMIC_TYPE_UINT:
3183                                         case ATOMIC_TYPE_LONG:
3184                                         case ATOMIC_TYPE_ULONG:
3185                                         case ATOMIC_TYPE_LONGLONG:
3186                                         case ATOMIC_TYPE_ULONGLONG:
3187                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3188                                                 tc = integer_type_class;
3189                                                 goto make_const;
3190
3191                                         case ATOMIC_TYPE_FLOAT:
3192                                         case ATOMIC_TYPE_DOUBLE:
3193                                         case ATOMIC_TYPE_LONG_DOUBLE:
3194                                                 tc = real_type_class;
3195                                                 goto make_const;
3196                                 }
3197                                 panic("Unexpected atomic type in classify_type_to_firm().");
3198                         }
3199
3200                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3201                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3202                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3203                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3204                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3205                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3206                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3207
3208                         /* gcc handles this as integer */
3209                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3210
3211                         /* gcc classifies the referenced type */
3212                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3213
3214                         /* typedef/typeof should be skipped already */
3215                         case TYPE_TYPEDEF:
3216                         case TYPE_TYPEOF:
3217                         case TYPE_ERROR:
3218                                 break;
3219                 }
3220                 panic("unexpected TYPE classify_type_to_firm().");
3221         }
3222
3223 make_const:;
3224         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3225         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3226         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3227         return new_d_Const(dbgi, tv);
3228 }
3229
3230 static ir_node *function_name_to_firm(
3231                 const funcname_expression_t *const expr)
3232 {
3233         switch(expr->kind) {
3234         case FUNCNAME_FUNCTION:
3235         case FUNCNAME_PRETTY_FUNCTION:
3236         case FUNCNAME_FUNCDNAME:
3237                 if (current_function_name == NULL) {
3238                         const source_position_t *const src_pos = &expr->base.source_position;
3239                         const char    *name  = current_function_entity->base.symbol->string;
3240                         const string_t string = { name, strlen(name) + 1 };
3241                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3242                 }
3243                 return current_function_name;
3244         case FUNCNAME_FUNCSIG:
3245                 if (current_funcsig == NULL) {
3246                         const source_position_t *const src_pos = &expr->base.source_position;
3247                         ir_entity *ent = get_irg_entity(current_ir_graph);
3248                         const char *const name = get_entity_ld_name(ent);
3249                         const string_t string = { name, strlen(name) + 1 };
3250                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3251                 }
3252                 return current_funcsig;
3253         }
3254         panic("Unsupported function name");
3255 }
3256
3257 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3258 {
3259         statement_t *statement = expr->statement;
3260
3261         assert(statement->kind == STATEMENT_COMPOUND);
3262         return compound_statement_to_firm(&statement->compound);
3263 }
3264
3265 static ir_node *va_start_expression_to_firm(
3266         const va_start_expression_t *const expr)
3267 {
3268         ir_entity *param_ent = current_vararg_entity;
3269         if (param_ent == NULL) {
3270                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3271                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3272                 ir_type *const param_type  = get_unknown_type();
3273                 param_ent = new_parameter_entity(frame_type, n, param_type);
3274                 current_vararg_entity = param_ent;
3275         }
3276
3277         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3278         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3279         ir_node  *const no_mem  = new_NoMem();
3280         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3281
3282         set_value_for_expression(expr->ap, arg_sel);
3283
3284         return NULL;
3285 }
3286
3287 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3288 {
3289         type_t       *const type    = expr->base.type;
3290         expression_t *const ap_expr = expr->ap;
3291         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3292         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3293         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3294         ir_node      *const res     = deref_address(dbgi, type, ap);
3295
3296         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3297         ir_mode      *const mode    = get_irn_mode(cnst);
3298         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3299         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3300         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3301         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3302         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3303
3304         set_value_for_expression_addr(ap_expr, add, ap_addr);
3305
3306         return res;
3307 }
3308
3309 /**
3310  * Generate Firm for a va_copy expression.
3311  */
3312 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3313 {
3314         ir_node *const src = expression_to_firm(expr->src);
3315         set_value_for_expression(expr->dst, src);
3316         return NULL;
3317 }
3318
3319 static ir_node *dereference_addr(const unary_expression_t *const expression)
3320 {
3321         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3322         return expression_to_firm(expression->value);
3323 }
3324
3325 /**
3326  * Returns a IR-node representing an lvalue of the given expression.
3327  */
3328 static ir_node *expression_to_addr(const expression_t *expression)
3329 {
3330         switch(expression->kind) {
3331         case EXPR_ARRAY_ACCESS:
3332                 return array_access_addr(&expression->array_access);
3333         case EXPR_CALL:
3334                 return call_expression_to_firm(&expression->call);
3335         case EXPR_COMPOUND_LITERAL:
3336                 return compound_literal_addr(&expression->compound_literal);
3337         case EXPR_REFERENCE:
3338                 return reference_addr(&expression->reference);
3339         case EXPR_SELECT:
3340                 return select_addr(&expression->select);
3341         case EXPR_UNARY_DEREFERENCE:
3342                 return dereference_addr(&expression->unary);
3343         default:
3344                 break;
3345         }
3346         panic("trying to get address of non-lvalue");
3347 }
3348
3349 static ir_node *builtin_constant_to_firm(
3350                 const builtin_constant_expression_t *expression)
3351 {
3352         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3353         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3354         return create_Const_from_bool(mode, v);
3355 }
3356
3357 static ir_node *builtin_types_compatible_to_firm(
3358                 const builtin_types_compatible_expression_t *expression)
3359 {
3360         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3361         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3362         bool     const value = types_compatible(left, right);
3363         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3364         return create_Const_from_bool(mode, value);
3365 }
3366
3367 static ir_node *get_label_block(label_t *label)
3368 {
3369         if (label->block != NULL)
3370                 return label->block;
3371
3372         /* beware: might be called from create initializer with current_ir_graph
3373          * set to const_code_irg. */
3374         ir_graph *rem    = current_ir_graph;
3375         current_ir_graph = current_function;
3376
3377         ir_node *block = new_immBlock();
3378
3379         label->block = block;
3380
3381         ARR_APP1(label_t *, all_labels, label);
3382
3383         current_ir_graph = rem;
3384         return block;
3385 }
3386
3387 /**
3388  * Pointer to a label.  This is used for the
3389  * GNU address-of-label extension.
3390  */
3391 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3392 {
3393         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3394         ir_node   *block  = get_label_block(label->label);
3395         ir_entity *entity = create_Block_entity(block);
3396
3397         symconst_symbol value;
3398         value.entity_p = entity;
3399         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3400 }
3401
3402 /**
3403  * creates firm nodes for an expression. The difference between this function
3404  * and expression_to_firm is, that this version might produce mode_b nodes
3405  * instead of mode_Is.
3406  */
3407 static ir_node *_expression_to_firm(expression_t const *const expr)
3408 {
3409 #ifndef NDEBUG
3410         if (!constant_folding) {
3411                 assert(!expr->base.transformed);
3412                 ((expression_t*)expr)->base.transformed = true;
3413         }
3414 #endif
3415
3416         switch (expr->kind) {
3417         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3418         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3419         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3420         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3421         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3422         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3423         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3424         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3425         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3426         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3427         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3428         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3429         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3430         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3431         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3432         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3433         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3434         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3435         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3436         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3437         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3438         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3439         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3440
3441         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3442
3443         case EXPR_ERROR: break;
3444         }
3445         panic("invalid expression found");
3446 }
3447
3448 /**
3449  * Check if a given expression is a GNU __builtin_expect() call.
3450  */
3451 static bool is_builtin_expect(const expression_t *expression)
3452 {
3453         if (expression->kind != EXPR_CALL)
3454                 return false;
3455
3456         expression_t *function = expression->call.function;
3457         if (function->kind != EXPR_REFERENCE)
3458                 return false;
3459         reference_expression_t *ref = &function->reference;
3460         if (ref->entity->kind         != ENTITY_FUNCTION ||
3461             ref->entity->function.btk != BUILTIN_EXPECT)
3462                 return false;
3463
3464         return true;
3465 }
3466
3467 static bool produces_mode_b(const expression_t *expression)
3468 {
3469         switch (expression->kind) {
3470         case EXPR_BINARY_EQUAL:
3471         case EXPR_BINARY_NOTEQUAL:
3472         case EXPR_BINARY_LESS:
3473         case EXPR_BINARY_LESSEQUAL:
3474         case EXPR_BINARY_GREATER:
3475         case EXPR_BINARY_GREATEREQUAL:
3476         case EXPR_BINARY_ISGREATER:
3477         case EXPR_BINARY_ISGREATEREQUAL:
3478         case EXPR_BINARY_ISLESS:
3479         case EXPR_BINARY_ISLESSEQUAL:
3480         case EXPR_BINARY_ISLESSGREATER:
3481         case EXPR_BINARY_ISUNORDERED:
3482         case EXPR_UNARY_NOT:
3483                 return true;
3484
3485         case EXPR_CALL:
3486                 if (is_builtin_expect(expression)) {
3487                         expression_t *argument = expression->call.arguments->expression;
3488                         return produces_mode_b(argument);
3489                 }
3490                 return false;
3491         case EXPR_BINARY_COMMA:
3492                 return produces_mode_b(expression->binary.right);
3493
3494         default:
3495                 return false;
3496         }
3497 }
3498
3499 static ir_node *expression_to_firm(const expression_t *expression)
3500 {
3501         if (!produces_mode_b(expression)) {
3502                 ir_node *res = _expression_to_firm(expression);
3503                 assert(res == NULL || get_irn_mode(res) != mode_b);
3504                 return res;
3505         }
3506
3507         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3508                 return new_Const(fold_constant_to_tarval(expression));
3509         }
3510
3511         /* we have to produce a 0/1 from the mode_b expression */
3512         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3513         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3514         return produce_condition_result(expression, mode, dbgi);
3515 }
3516
3517 /**
3518  * create a short-circuit expression evaluation that tries to construct
3519  * efficient control flow structures for &&, || and ! expressions
3520  */
3521 static ir_node *create_condition_evaluation(const expression_t *expression,
3522                                             ir_node *true_block,
3523                                             ir_node *false_block)
3524 {
3525         switch(expression->kind) {
3526         case EXPR_UNARY_NOT: {
3527                 const unary_expression_t *unary_expression = &expression->unary;
3528                 create_condition_evaluation(unary_expression->value, false_block,
3529                                             true_block);
3530                 return NULL;
3531         }
3532         case EXPR_BINARY_LOGICAL_AND: {
3533                 const binary_expression_t *binary_expression = &expression->binary;
3534
3535                 ir_node *extra_block = new_immBlock();
3536                 create_condition_evaluation(binary_expression->left, extra_block,
3537                                             false_block);
3538                 mature_immBlock(extra_block);
3539                 set_cur_block(extra_block);
3540                 create_condition_evaluation(binary_expression->right, true_block,
3541                                             false_block);
3542                 return NULL;
3543         }
3544         case EXPR_BINARY_LOGICAL_OR: {
3545                 const binary_expression_t *binary_expression = &expression->binary;
3546
3547                 ir_node *extra_block = new_immBlock();
3548                 create_condition_evaluation(binary_expression->left, true_block,
3549                                             extra_block);
3550                 mature_immBlock(extra_block);
3551                 set_cur_block(extra_block);
3552                 create_condition_evaluation(binary_expression->right, true_block,
3553                                             false_block);
3554                 return NULL;
3555         }
3556         default:
3557                 break;
3558         }
3559
3560         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3561         ir_node  *cond_expr  = _expression_to_firm(expression);
3562         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3563         ir_node  *cond       = new_d_Cond(dbgi, condition);
3564         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3565         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3566
3567         /* set branch prediction info based on __builtin_expect */
3568         if (is_builtin_expect(expression) && is_Cond(cond)) {
3569                 call_argument_t *argument = expression->call.arguments->next;
3570                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3571                         bool               const cnst = fold_constant_to_bool(argument->expression);
3572                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3573                         set_Cond_jmp_pred(cond, pred);
3574                 }
3575         }
3576
3577         add_immBlock_pred(true_block, true_proj);
3578         add_immBlock_pred(false_block, false_proj);
3579
3580         set_unreachable_now();
3581         return cond_expr;
3582 }
3583
3584 static void create_variable_entity(entity_t *variable,
3585                                    declaration_kind_t declaration_kind,
3586                                    ir_type *parent_type)
3587 {
3588         assert(variable->kind == ENTITY_VARIABLE);
3589         type_t    *type = skip_typeref(variable->declaration.type);
3590
3591         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3592         ir_type   *const irtype    = get_ir_type(type);
3593         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3594         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3595         unsigned         alignment = variable->declaration.alignment;
3596
3597         set_entity_alignment(irentity, alignment);
3598
3599         handle_decl_modifiers(irentity, variable);
3600
3601         variable->declaration.kind  = (unsigned char) declaration_kind;
3602         variable->variable.v.entity = irentity;
3603         set_entity_ld_ident(irentity, create_ld_ident(variable));
3604
3605         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3606                 set_entity_volatility(irentity, volatility_is_volatile);
3607         }
3608 }
3609
3610
3611 typedef struct type_path_entry_t type_path_entry_t;
3612 struct type_path_entry_t {
3613         type_t           *type;
3614         ir_initializer_t *initializer;
3615         size_t            index;
3616         entity_t         *compound_entry;
3617 };
3618
3619 typedef struct type_path_t type_path_t;
3620 struct type_path_t {
3621         type_path_entry_t *path;
3622         type_t            *top_type;
3623         bool               invalid;
3624 };
3625
3626 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3627 {
3628         size_t len = ARR_LEN(path->path);
3629
3630         for (size_t i = 0; i < len; ++i) {
3631                 const type_path_entry_t *entry = & path->path[i];
3632
3633                 type_t *type = skip_typeref(entry->type);
3634                 if (is_type_compound(type)) {
3635                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3636                 } else if (is_type_array(type)) {
3637                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3638                 } else {
3639                         fprintf(stderr, "-INVALID-");
3640                 }
3641         }
3642         fprintf(stderr, "  (");
3643         print_type(path->top_type);
3644         fprintf(stderr, ")");
3645 }
3646
3647 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3648 {
3649         size_t len = ARR_LEN(path->path);
3650         assert(len > 0);
3651         return & path->path[len-1];
3652 }
3653
3654 static type_path_entry_t *append_to_type_path(type_path_t *path)
3655 {
3656         size_t len = ARR_LEN(path->path);
3657         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3658
3659         type_path_entry_t *result = & path->path[len];
3660         memset(result, 0, sizeof(result[0]));
3661         return result;
3662 }
3663
3664 static size_t get_compound_member_count(const compound_type_t *type)
3665 {
3666         compound_t *compound  = type->compound;
3667         size_t      n_members = 0;
3668         entity_t   *member    = compound->members.entities;
3669         for ( ; member != NULL; member = member->base.next) {
3670                 ++n_members;
3671         }
3672
3673         return n_members;
3674 }
3675
3676 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3677 {
3678         type_t *orig_top_type = path->top_type;
3679         type_t *top_type      = skip_typeref(orig_top_type);
3680
3681         assert(is_type_compound(top_type) || is_type_array(top_type));
3682
3683         if (ARR_LEN(path->path) == 0) {
3684                 return NULL;
3685         } else {
3686                 type_path_entry_t *top         = get_type_path_top(path);
3687                 ir_initializer_t  *initializer = top->initializer;
3688                 return get_initializer_compound_value(initializer, top->index);
3689         }
3690 }
3691
3692 static void descend_into_subtype(type_path_t *path)
3693 {
3694         type_t *orig_top_type = path->top_type;
3695         type_t *top_type      = skip_typeref(orig_top_type);
3696
3697         assert(is_type_compound(top_type) || is_type_array(top_type));
3698
3699         ir_initializer_t *initializer = get_initializer_entry(path);
3700
3701         type_path_entry_t *top = append_to_type_path(path);
3702         top->type              = top_type;
3703
3704         size_t len;
3705
3706         if (is_type_compound(top_type)) {
3707                 compound_t *const compound = top_type->compound.compound;
3708                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3709
3710                 top->compound_entry = entry;
3711                 top->index          = 0;
3712                 len                 = get_compound_member_count(&top_type->compound);
3713                 if (entry != NULL) {
3714                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3715                         path->top_type = entry->declaration.type;
3716                 }
3717         } else {
3718                 assert(is_type_array(top_type));
3719                 assert(top_type->array.size > 0);
3720
3721                 top->index     = 0;
3722                 path->top_type = top_type->array.element_type;
3723                 len            = top_type->array.size;
3724         }
3725         if (initializer == NULL
3726                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3727                 initializer = create_initializer_compound(len);
3728                 /* we have to set the entry at the 2nd latest path entry... */
3729                 size_t path_len = ARR_LEN(path->path);
3730                 assert(path_len >= 1);
3731                 if (path_len > 1) {
3732                         type_path_entry_t *entry        = & path->path[path_len-2];
3733                         ir_initializer_t  *tinitializer = entry->initializer;
3734                         set_initializer_compound_value(tinitializer, entry->index,
3735                                                        initializer);
3736                 }
3737         }
3738         top->initializer = initializer;
3739 }
3740
3741 static void ascend_from_subtype(type_path_t *path)
3742 {
3743         type_path_entry_t *top = get_type_path_top(path);
3744
3745         path->top_type = top->type;
3746
3747         size_t len = ARR_LEN(path->path);
3748         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3749 }
3750
3751 static void walk_designator(type_path_t *path, const designator_t *designator)
3752 {
3753         /* designators start at current object type */
3754         ARR_RESIZE(type_path_entry_t, path->path, 1);
3755
3756         for ( ; designator != NULL; designator = designator->next) {
3757                 type_path_entry_t *top         = get_type_path_top(path);
3758                 type_t            *orig_type   = top->type;
3759                 type_t            *type        = skip_typeref(orig_type);
3760
3761                 if (designator->symbol != NULL) {
3762                         assert(is_type_compound(type));
3763                         size_t    index  = 0;
3764                         symbol_t *symbol = designator->symbol;
3765
3766                         compound_t *compound = type->compound.compound;
3767                         entity_t   *iter     = compound->members.entities;
3768                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3769                                 if (iter->base.symbol == symbol) {
3770                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3771                                         break;
3772                                 }
3773                         }
3774                         assert(iter != NULL);
3775
3776                         /* revert previous initialisations of other union elements */
3777                         if (type->kind == TYPE_COMPOUND_UNION) {
3778                                 ir_initializer_t *initializer = top->initializer;
3779                                 if (initializer != NULL
3780                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3781                                         /* are we writing to a new element? */
3782                                         ir_initializer_t *oldi
3783                                                 = get_initializer_compound_value(initializer, index);
3784                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3785                                                 /* clear initializer */
3786                                                 size_t len
3787                                                         = get_initializer_compound_n_entries(initializer);
3788                                                 ir_initializer_t *nulli = get_initializer_null();
3789                                                 for (size_t i = 0; i < len; ++i) {
3790                                                         set_initializer_compound_value(initializer, i,
3791                                                                                        nulli);
3792                                                 }
3793                                         }
3794                                 }
3795                         }
3796
3797                         top->type           = orig_type;
3798                         top->compound_entry = iter;
3799                         top->index          = index;
3800                         orig_type           = iter->declaration.type;
3801                 } else {
3802                         expression_t *array_index = designator->array_index;
3803                         assert(designator->array_index != NULL);
3804                         assert(is_type_array(type));
3805
3806                         long index = fold_constant_to_int(array_index);
3807                         assert(index >= 0);
3808 #ifndef NDEBUG
3809                         if (type->array.size_constant) {
3810                                 long array_size = type->array.size;
3811                                 assert(index < array_size);
3812                         }
3813 #endif
3814
3815                         top->type  = orig_type;
3816                         top->index = (size_t) index;
3817                         orig_type  = type->array.element_type;
3818                 }
3819                 path->top_type = orig_type;
3820
3821                 if (designator->next != NULL) {
3822                         descend_into_subtype(path);
3823                 }
3824         }
3825
3826         path->invalid  = false;
3827 }
3828
3829 static void advance_current_object(type_path_t *path)
3830 {
3831         if (path->invalid) {
3832                 /* TODO: handle this... */
3833                 panic("invalid initializer in ast2firm (excessive elements)");
3834         }
3835
3836         type_path_entry_t *top = get_type_path_top(path);
3837
3838         type_t *type = skip_typeref(top->type);
3839         if (is_type_union(type)) {
3840                 /* only the first element is initialized in unions */
3841                 top->compound_entry = NULL;
3842         } else if (is_type_struct(type)) {
3843                 entity_t *entry = top->compound_entry;
3844
3845                 top->index++;
3846                 entry               = skip_unnamed_bitfields(entry->base.next);
3847                 top->compound_entry = entry;
3848                 if (entry != NULL) {
3849                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3850                         path->top_type = entry->declaration.type;
3851                         return;
3852                 }
3853         } else {
3854                 assert(is_type_array(type));
3855
3856                 top->index++;
3857                 if (!type->array.size_constant || top->index < type->array.size) {
3858                         return;
3859                 }
3860         }
3861
3862         /* we're past the last member of the current sub-aggregate, try if we
3863          * can ascend in the type hierarchy and continue with another subobject */
3864         size_t len = ARR_LEN(path->path);
3865
3866         if (len > 1) {
3867                 ascend_from_subtype(path);
3868                 advance_current_object(path);
3869         } else {
3870                 path->invalid = true;
3871         }
3872 }
3873
3874
3875 static ir_initializer_t *create_ir_initializer_value(
3876                 const initializer_value_t *initializer)
3877 {
3878         if (is_type_compound(initializer->value->base.type)) {
3879                 panic("initializer creation for compounds not implemented yet");
3880         }
3881         type_t       *type = initializer->value->base.type;
3882         expression_t *expr = initializer->value;
3883         ir_node *value = expression_to_firm(expr);
3884         ir_mode *mode  = get_ir_mode_storage(type);
3885         value          = create_conv(NULL, value, mode);
3886         return create_initializer_const(value);
3887 }
3888
3889 /** test wether type can be initialized by a string constant */
3890 static bool is_string_type(type_t *type)
3891 {
3892         type_t *inner;
3893         if (is_type_pointer(type)) {
3894                 inner = skip_typeref(type->pointer.points_to);
3895         } else if(is_type_array(type)) {
3896                 inner = skip_typeref(type->array.element_type);
3897         } else {
3898                 return false;
3899         }
3900
3901         return is_type_integer(inner);
3902 }
3903
3904 static ir_initializer_t *create_ir_initializer_list(
3905                 const initializer_list_t *initializer, type_t *type)
3906 {
3907         type_path_t path;
3908         memset(&path, 0, sizeof(path));
3909         path.top_type = type;
3910         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3911
3912         descend_into_subtype(&path);
3913
3914         for (size_t i = 0; i < initializer->len; ++i) {
3915                 const initializer_t *sub_initializer = initializer->initializers[i];
3916
3917                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3918                         walk_designator(&path, sub_initializer->designator.designator);
3919                         continue;
3920                 }
3921
3922                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3923                         /* we might have to descend into types until we're at a scalar
3924                          * type */
3925                         while(true) {
3926                                 type_t *orig_top_type = path.top_type;
3927                                 type_t *top_type      = skip_typeref(orig_top_type);
3928
3929                                 if (is_type_scalar(top_type))
3930                                         break;
3931                                 descend_into_subtype(&path);
3932                         }
3933                 } else if (sub_initializer->kind == INITIALIZER_STRING
3934                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3935                         /* we might have to descend into types until we're at a scalar
3936                          * type */
3937                         while (true) {
3938                                 type_t *orig_top_type = path.top_type;
3939                                 type_t *top_type      = skip_typeref(orig_top_type);
3940
3941                                 if (is_string_type(top_type))
3942                                         break;
3943                                 descend_into_subtype(&path);
3944                         }
3945                 }
3946
3947                 ir_initializer_t *sub_irinitializer
3948                         = create_ir_initializer(sub_initializer, path.top_type);
3949
3950                 size_t path_len = ARR_LEN(path.path);
3951                 assert(path_len >= 1);
3952                 type_path_entry_t *entry        = & path.path[path_len-1];
3953                 ir_initializer_t  *tinitializer = entry->initializer;
3954                 set_initializer_compound_value(tinitializer, entry->index,
3955                                                sub_irinitializer);
3956
3957                 advance_current_object(&path);
3958         }
3959
3960         assert(ARR_LEN(path.path) >= 1);
3961         ir_initializer_t *result = path.path[0].initializer;
3962         DEL_ARR_F(path.path);
3963
3964         return result;
3965 }
3966
3967 static ir_initializer_t *create_ir_initializer_string(
3968                 const initializer_string_t *initializer, type_t *type)
3969 {
3970         type = skip_typeref(type);
3971
3972         size_t            string_len    = initializer->string.size;
3973         assert(type->kind == TYPE_ARRAY);
3974         assert(type->array.size_constant);
3975         size_t            len           = type->array.size;
3976         ir_initializer_t *irinitializer = create_initializer_compound(len);
3977
3978         const char *string = initializer->string.begin;
3979         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3980
3981         for (size_t i = 0; i < len; ++i) {
3982                 char c = 0;
3983                 if (i < string_len)
3984                         c = string[i];
3985
3986                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3987                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3988
3989                 set_initializer_compound_value(irinitializer, i, char_initializer);
3990         }
3991
3992         return irinitializer;
3993 }
3994
3995 static ir_initializer_t *create_ir_initializer_wide_string(
3996                 const initializer_wide_string_t *initializer, type_t *type)
3997 {
3998         assert(type->kind == TYPE_ARRAY);
3999         assert(type->array.size_constant);
4000         size_t            len           = type->array.size;
4001         size_t            string_len    = wstrlen(&initializer->string);
4002         ir_initializer_t *irinitializer = create_initializer_compound(len);
4003
4004         const char *p    = initializer->string.begin;
4005         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4006
4007         for (size_t i = 0; i < len; ++i) {
4008                 utf32 c = 0;
4009                 if (i < string_len) {
4010                         c = read_utf8_char(&p);
4011                 }
4012                 ir_tarval *tv = new_tarval_from_long(c, mode);
4013                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4014
4015                 set_initializer_compound_value(irinitializer, i, char_initializer);
4016         }
4017
4018         return irinitializer;
4019 }
4020
4021 static ir_initializer_t *create_ir_initializer(
4022                 const initializer_t *initializer, type_t *type)
4023 {
4024         switch(initializer->kind) {
4025                 case INITIALIZER_STRING:
4026                         return create_ir_initializer_string(&initializer->string, type);
4027
4028                 case INITIALIZER_WIDE_STRING:
4029                         return create_ir_initializer_wide_string(&initializer->wide_string,
4030                                                                  type);
4031
4032                 case INITIALIZER_LIST:
4033                         return create_ir_initializer_list(&initializer->list, type);
4034
4035                 case INITIALIZER_VALUE:
4036                         return create_ir_initializer_value(&initializer->value);
4037
4038                 case INITIALIZER_DESIGNATOR:
4039                         panic("unexpected designator initializer found");
4040         }
4041         panic("unknown initializer");
4042 }
4043
4044 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4045  *  are elements [...] the remainder of the aggregate shall be initialized
4046  *  implicitly the same as objects that have static storage duration. */
4047 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4048                 ir_node *base_addr)
4049 {
4050         /* for unions we must NOT do anything for null initializers */
4051         ir_type *owner = get_entity_owner(entity);
4052         if (is_Union_type(owner)) {
4053                 return;
4054         }
4055
4056         ir_type *ent_type = get_entity_type(entity);
4057         /* create sub-initializers for a compound type */
4058         if (is_compound_type(ent_type)) {
4059                 unsigned n_members = get_compound_n_members(ent_type);
4060                 for (unsigned n = 0; n < n_members; ++n) {
4061                         ir_entity *member = get_compound_member(ent_type, n);
4062                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4063                                                                 member);
4064                         create_dynamic_null_initializer(member, dbgi, addr);
4065                 }
4066                 return;
4067         }
4068         if (is_Array_type(ent_type)) {
4069                 assert(has_array_upper_bound(ent_type, 0));
4070                 long n = get_array_upper_bound_int(ent_type, 0);
4071                 for (long i = 0; i < n; ++i) {
4072                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4073                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4074                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4075                         ir_node   *in[1]    = { cnst };
4076                         ir_entity *arrent   = get_array_element_entity(ent_type);
4077                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4078                                                         arrent);
4079                         create_dynamic_null_initializer(arrent, dbgi, addr);
4080                 }
4081                 return;
4082         }
4083
4084         ir_mode *value_mode = get_type_mode(ent_type);
4085         ir_node *node       = new_Const(get_mode_null(value_mode));
4086
4087         /* is it a bitfield type? */
4088         if (is_Primitive_type(ent_type) &&
4089                         get_primitive_base_type(ent_type) != NULL) {
4090                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4091                 return;
4092         }
4093
4094         ir_node *mem    = get_store();
4095         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4096         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4097         set_store(proj_m);
4098 }
4099
4100 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4101                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4102 {
4103         switch(get_initializer_kind(initializer)) {
4104         case IR_INITIALIZER_NULL:
4105                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4106                 return;
4107         case IR_INITIALIZER_CONST: {
4108                 ir_node *node     = get_initializer_const_value(initializer);
4109                 ir_type *ent_type = get_entity_type(entity);
4110
4111                 /* is it a bitfield type? */
4112                 if (is_Primitive_type(ent_type) &&
4113                                 get_primitive_base_type(ent_type) != NULL) {
4114                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4115                         return;
4116                 }
4117
4118                 assert(get_type_mode(type) == get_irn_mode(node));
4119                 ir_node *mem    = get_store();
4120                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4121                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4122                 set_store(proj_m);
4123                 return;
4124         }
4125         case IR_INITIALIZER_TARVAL: {
4126                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4127                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4128                 ir_type   *ent_type = get_entity_type(entity);
4129
4130                 /* is it a bitfield type? */
4131                 if (is_Primitive_type(ent_type) &&
4132                                 get_primitive_base_type(ent_type) != NULL) {
4133                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4134                         return;
4135                 }
4136
4137                 assert(get_type_mode(type) == get_tarval_mode(tv));
4138                 ir_node *mem    = get_store();
4139                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4140                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4141                 set_store(proj_m);
4142                 return;
4143         }
4144         case IR_INITIALIZER_COMPOUND: {
4145                 assert(is_compound_type(type) || is_Array_type(type));
4146                 int n_members;
4147                 if (is_Array_type(type)) {
4148                         assert(has_array_upper_bound(type, 0));
4149                         n_members = get_array_upper_bound_int(type, 0);
4150                 } else {
4151                         n_members = get_compound_n_members(type);
4152                 }
4153
4154                 if (get_initializer_compound_n_entries(initializer)
4155                                 != (unsigned) n_members)
4156                         panic("initializer doesn't match compound type");
4157
4158                 for (int i = 0; i < n_members; ++i) {
4159                         ir_node   *addr;
4160                         ir_type   *irtype;
4161                         ir_entity *sub_entity;
4162                         if (is_Array_type(type)) {
4163                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4164                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4165                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4166                                 ir_node   *in[1]    = { cnst };
4167                                 irtype     = get_array_element_type(type);
4168                                 sub_entity = get_array_element_entity(type);
4169                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4170                                                        sub_entity);
4171                         } else {
4172                                 sub_entity = get_compound_member(type, i);
4173                                 irtype     = get_entity_type(sub_entity);
4174                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4175                                                              sub_entity);
4176                         }
4177
4178                         ir_initializer_t *sub_init
4179                                 = get_initializer_compound_value(initializer, i);
4180
4181                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4182                                                        addr);
4183                 }
4184                 return;
4185         }
4186         }
4187
4188         panic("invalid IR_INITIALIZER found");
4189 }
4190
4191 static void create_dynamic_initializer(ir_initializer_t *initializer,
4192                 dbg_info *dbgi, ir_entity *entity)
4193 {
4194         ir_node *frame     = get_irg_frame(current_ir_graph);
4195         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4196         ir_type *type      = get_entity_type(entity);
4197
4198         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4199 }
4200
4201 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4202                                      ir_entity *entity, type_t *type)
4203 {
4204         ir_node *memory = get_store();
4205         ir_node *nomem  = new_NoMem();
4206         ir_node *frame  = get_irg_frame(current_ir_graph);
4207         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4208
4209         if (initializer->kind == INITIALIZER_VALUE) {
4210                 initializer_value_t *initializer_value = &initializer->value;
4211
4212                 ir_node *value = expression_to_firm(initializer_value->value);
4213                 type = skip_typeref(type);
4214                 assign_value(dbgi, addr, type, value);
4215                 return;
4216         }
4217
4218         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4219                 ir_initializer_t *irinitializer
4220                         = create_ir_initializer(initializer, type);
4221
4222                 create_dynamic_initializer(irinitializer, dbgi, entity);
4223                 return;
4224         }
4225
4226         /* create a "template" entity which is copied to the entity on the stack */
4227         ir_entity *const init_entity
4228                 = create_initializer_entity(dbgi, initializer, type);
4229         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4230         ir_type *const irtype   = get_ir_type(type);
4231         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4232
4233         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4234         set_store(copyb_mem);
4235 }
4236
4237 static void create_initializer_local_variable_entity(entity_t *entity)
4238 {
4239         assert(entity->kind == ENTITY_VARIABLE);
4240         initializer_t *initializer = entity->variable.initializer;
4241         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4242         ir_entity     *irentity    = entity->variable.v.entity;
4243         type_t        *type        = entity->declaration.type;
4244
4245         create_local_initializer(initializer, dbgi, irentity, type);
4246 }
4247
4248 static void create_variable_initializer(entity_t *entity)
4249 {
4250         assert(entity->kind == ENTITY_VARIABLE);
4251         initializer_t *initializer = entity->variable.initializer;
4252         if (initializer == NULL)
4253                 return;
4254
4255         declaration_kind_t declaration_kind
4256                 = (declaration_kind_t) entity->declaration.kind;
4257         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4258                 create_initializer_local_variable_entity(entity);
4259                 return;
4260         }
4261
4262         type_t            *type = entity->declaration.type;
4263         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4264
4265         if (initializer->kind == INITIALIZER_VALUE) {
4266                 expression_t *      value     = initializer->value.value;
4267                 type_t       *const init_type = skip_typeref(value->base.type);
4268
4269                 if (!is_type_scalar(init_type)) {
4270                         /* skip convs */
4271                         while (value->kind == EXPR_UNARY_CAST)
4272                                 value = value->unary.value;
4273
4274                         if (value->kind != EXPR_COMPOUND_LITERAL)
4275                                 panic("expected non-scalar initializer to be a compound literal");
4276                         initializer = value->compound_literal.initializer;
4277                         goto have_initializer;
4278                 }
4279
4280                 ir_node  *      node = expression_to_firm(value);
4281                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4282                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4283                 node = create_conv(dbgi, node, mode);
4284                 node = do_strict_conv(dbgi, node);
4285
4286                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4287                         set_value(entity->variable.v.value_number, node);
4288                 } else {
4289                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4290
4291                         ir_entity *irentity = entity->variable.v.entity;
4292
4293                         if (tq & TYPE_QUALIFIER_CONST
4294                                         && get_entity_owner(irentity) != get_tls_type()) {
4295                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4296                         }
4297                         set_atomic_ent_value(irentity, node);
4298                 }
4299         } else {
4300 have_initializer:
4301                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4302                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4303
4304                 ir_entity        *irentity        = entity->variable.v.entity;
4305                 ir_initializer_t *irinitializer
4306                         = create_ir_initializer(initializer, type);
4307
4308                 if (tq & TYPE_QUALIFIER_CONST) {
4309                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4310                 }
4311                 set_entity_initializer(irentity, irinitializer);
4312         }
4313 }
4314
4315 static void create_variable_length_array(entity_t *entity)
4316 {
4317         assert(entity->kind == ENTITY_VARIABLE);
4318         assert(entity->variable.initializer == NULL);
4319
4320         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4321         entity->variable.v.vla_base = NULL;
4322
4323         /* TODO: record VLA somewhere so we create the free node when we leave
4324          * it's scope */
4325 }
4326
4327 static void allocate_variable_length_array(entity_t *entity)
4328 {
4329         assert(entity->kind == ENTITY_VARIABLE);
4330         assert(entity->variable.initializer == NULL);
4331         assert(currently_reachable());
4332
4333         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4334         type_t   *type      = entity->declaration.type;
4335         ir_type  *el_type   = get_ir_type(type->array.element_type);
4336
4337         /* make sure size_node is calculated */
4338         get_type_size_node(type);
4339         ir_node  *elems = type->array.size_node;
4340         ir_node  *mem   = get_store();
4341         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4342
4343         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4344         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4345         set_store(proj_m);
4346
4347         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4348         entity->variable.v.vla_base = addr;
4349 }
4350
4351 /**
4352  * Creates a Firm local variable from a declaration.
4353  */
4354 static void create_local_variable(entity_t *entity)
4355 {
4356         assert(entity->kind == ENTITY_VARIABLE);
4357         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4358
4359         bool needs_entity = entity->variable.address_taken;
4360         type_t *type = skip_typeref(entity->declaration.type);
4361
4362         /* is it a variable length array? */
4363         if (is_type_array(type) && !type->array.size_constant) {
4364                 create_variable_length_array(entity);
4365                 return;
4366         } else if (is_type_array(type) || is_type_compound(type)) {
4367                 needs_entity = true;
4368         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4369                 needs_entity = true;
4370         }
4371
4372         if (needs_entity) {
4373                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4374                 create_variable_entity(entity,
4375                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4376                                        frame_type);
4377         } else {
4378                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4379                 entity->variable.v.value_number = next_value_number_function;
4380                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4381                                         entity);
4382                 ++next_value_number_function;
4383         }
4384 }
4385
4386 static void create_local_static_variable(entity_t *entity)
4387 {
4388         assert(entity->kind == ENTITY_VARIABLE);
4389         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4390
4391         type_t   *type           = skip_typeref(entity->declaration.type);
4392         ir_type  *const var_type = entity->variable.thread_local ?
4393                 get_tls_type() : get_glob_type();
4394         ir_type  *const irtype   = get_ir_type(type);
4395         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4396
4397         size_t l = strlen(entity->base.symbol->string);
4398         char   buf[l + sizeof(".%u")];
4399         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4400         ident     *const id       = id_unique(buf);
4401         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4402
4403         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4404                 set_entity_volatility(irentity, volatility_is_volatile);
4405         }
4406
4407         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4408         entity->variable.v.entity = irentity;
4409
4410         set_entity_ld_ident(irentity, id);
4411         set_entity_visibility(irentity, ir_visibility_local);
4412
4413         if (entity->variable.initializer == NULL) {
4414                 ir_initializer_t *null_init = get_initializer_null();
4415                 set_entity_initializer(irentity, null_init);
4416         }
4417
4418         ir_graph *const old_current_ir_graph = current_ir_graph;
4419         current_ir_graph = get_const_code_irg();
4420
4421         create_variable_initializer(entity);
4422
4423         assert(current_ir_graph == get_const_code_irg());
4424         current_ir_graph = old_current_ir_graph;
4425 }
4426
4427
4428
4429 static ir_node *return_statement_to_firm(return_statement_t *statement)
4430 {
4431         if (!currently_reachable())
4432                 return NULL;
4433
4434         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4435         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4436         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4437
4438         int in_len;
4439         if (!is_type_void(type)) {
4440                 ir_mode *const mode = get_ir_mode_storage(type);
4441                 if (res) {
4442                         res = create_conv(dbgi, res, mode);
4443                         res = do_strict_conv(dbgi, res);
4444                 } else {
4445                         res = new_Unknown(mode);
4446                 }
4447                 in_len = 1;
4448         } else {
4449                 in_len = 0;
4450         }
4451
4452         ir_node *const in[1] = { res };
4453         ir_node *const store = get_store();
4454         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4455
4456         ir_node *end_block = get_irg_end_block(current_ir_graph);
4457         add_immBlock_pred(end_block, ret);
4458
4459         set_unreachable_now();
4460         return NULL;
4461 }
4462
4463 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4464 {
4465         if (!currently_reachable())
4466                 return NULL;
4467
4468         return expression_to_firm(statement->expression);
4469 }
4470
4471 static void create_local_declarations(entity_t*);
4472
4473 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4474 {
4475         create_local_declarations(compound->scope.entities);
4476
4477         ir_node     *result    = NULL;
4478         statement_t *statement = compound->statements;
4479         for ( ; statement != NULL; statement = statement->base.next) {
4480                 result = statement_to_firm(statement);
4481         }
4482
4483         return result;
4484 }
4485
4486 static void create_global_variable(entity_t *entity)
4487 {
4488         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4489         ir_visibility       visibility = ir_visibility_external;
4490         storage_class_tag_t storage
4491                 = (storage_class_tag_t)entity->declaration.storage_class;
4492         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4493         assert(entity->kind == ENTITY_VARIABLE);
4494
4495         switch (storage) {
4496         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4497         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4498         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4499         case STORAGE_CLASS_TYPEDEF:
4500         case STORAGE_CLASS_AUTO:
4501         case STORAGE_CLASS_REGISTER:
4502                 panic("invalid storage class for global var");
4503         }
4504
4505         /* "common" symbols */
4506         if (storage == STORAGE_CLASS_NONE
4507             && entity->variable.initializer == NULL
4508             && !entity->variable.thread_local
4509             && (modifiers & DM_WEAK) == 0) {
4510                 linkage |= IR_LINKAGE_MERGE;
4511         }
4512
4513         ir_type *var_type = get_glob_type();
4514         if (entity->variable.thread_local) {
4515                 var_type = get_tls_type();
4516         }
4517         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4518         ir_entity *irentity = entity->variable.v.entity;
4519         add_entity_linkage(irentity, linkage);
4520         set_entity_visibility(irentity, visibility);
4521         if (entity->variable.initializer == NULL
4522             && storage != STORAGE_CLASS_EXTERN) {
4523                 ir_initializer_t *null_init = get_initializer_null();
4524                 set_entity_initializer(irentity, null_init);
4525         }
4526 }
4527
4528 static void create_local_declaration(entity_t *entity)
4529 {
4530         assert(is_declaration(entity));
4531
4532         /* construct type */
4533         (void) get_ir_type(entity->declaration.type);
4534         if (entity->base.symbol == NULL) {
4535                 return;
4536         }
4537
4538         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4539         case STORAGE_CLASS_STATIC:
4540                 if (entity->kind == ENTITY_FUNCTION) {
4541                         (void)get_function_entity(entity, NULL);
4542                 } else {
4543                         create_local_static_variable(entity);
4544                 }
4545                 return;
4546         case STORAGE_CLASS_EXTERN:
4547                 if (entity->kind == ENTITY_FUNCTION) {
4548                         assert(entity->function.statement == NULL);
4549                         (void)get_function_entity(entity, NULL);
4550                 } else {
4551                         create_global_variable(entity);
4552                         create_variable_initializer(entity);
4553                 }
4554                 return;
4555         case STORAGE_CLASS_NONE:
4556         case STORAGE_CLASS_AUTO:
4557         case STORAGE_CLASS_REGISTER:
4558                 if (entity->kind == ENTITY_FUNCTION) {
4559                         if (entity->function.statement != NULL) {
4560                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4561                                 (void)get_function_entity(entity, owner);
4562                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4563                                 enqueue_inner_function(entity);
4564                         } else {
4565                                 (void)get_function_entity(entity, NULL);
4566                         }
4567                 } else {
4568                         create_local_variable(entity);
4569                 }
4570                 return;
4571         case STORAGE_CLASS_TYPEDEF:
4572                 break;
4573         }
4574         panic("invalid storage class found");
4575 }
4576
4577 static void create_local_declarations(entity_t *e)
4578 {
4579         for (; e; e = e->base.next) {
4580                 if (is_declaration(e))
4581                         create_local_declaration(e);
4582         }
4583 }
4584
4585 static void initialize_local_declaration(entity_t *entity)
4586 {
4587         if (entity->base.symbol == NULL)
4588                 return;
4589
4590         // no need to emit code in dead blocks
4591         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4592                         && !currently_reachable())
4593                 return;
4594
4595         switch ((declaration_kind_t) entity->declaration.kind) {
4596         case DECLARATION_KIND_LOCAL_VARIABLE:
4597         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4598                 create_variable_initializer(entity);
4599                 return;
4600
4601         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4602                 allocate_variable_length_array(entity);
4603                 return;
4604
4605         case DECLARATION_KIND_COMPOUND_MEMBER:
4606         case DECLARATION_KIND_GLOBAL_VARIABLE:
4607         case DECLARATION_KIND_FUNCTION:
4608         case DECLARATION_KIND_INNER_FUNCTION:
4609                 return;
4610
4611         case DECLARATION_KIND_PARAMETER:
4612         case DECLARATION_KIND_PARAMETER_ENTITY:
4613                 panic("can't initialize parameters");
4614
4615         case DECLARATION_KIND_UNKNOWN:
4616                 panic("can't initialize unknown declaration");
4617         }
4618         panic("invalid declaration kind");
4619 }
4620
4621 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4622 {
4623         entity_t *entity = statement->declarations_begin;
4624         if (entity == NULL)
4625                 return NULL;
4626
4627         entity_t *const last = statement->declarations_end;
4628         for ( ;; entity = entity->base.next) {
4629                 if (is_declaration(entity)) {
4630                         initialize_local_declaration(entity);
4631                 } else if (entity->kind == ENTITY_TYPEDEF) {
4632                         /* §6.7.7:3  Any array size expressions associated with variable length
4633                          * array declarators are evaluated each time the declaration of the
4634                          * typedef name is reached in the order of execution. */
4635                         type_t *const type = skip_typeref(entity->typedefe.type);
4636                         if (is_type_array(type) && type->array.is_vla)
4637                                 get_vla_size(&type->array);
4638                 }
4639                 if (entity == last)
4640                         break;
4641         }
4642
4643         return NULL;
4644 }
4645
4646 static ir_node *if_statement_to_firm(if_statement_t *statement)
4647 {
4648         create_local_declarations(statement->scope.entities);
4649
4650         /* Create the condition. */
4651         ir_node *true_block  = NULL;
4652         ir_node *false_block = NULL;
4653         if (currently_reachable()) {
4654                 true_block  = new_immBlock();
4655                 false_block = new_immBlock();
4656                 create_condition_evaluation(statement->condition, true_block, false_block);
4657                 mature_immBlock(true_block);
4658                 mature_immBlock(false_block);
4659         }
4660
4661         /* Create the true statement. */
4662         set_cur_block(true_block);
4663         statement_to_firm(statement->true_statement);
4664         ir_node *fallthrough_block = get_cur_block();
4665
4666         /* Create the false statement. */
4667         set_cur_block(false_block);
4668         if (statement->false_statement != NULL) {
4669                 statement_to_firm(statement->false_statement);
4670         }
4671
4672         /* Handle the block after the if-statement.  Minor simplification and
4673          * optimisation: Reuse the false/true block as fallthrough block, if the
4674          * true/false statement does not pass control to the fallthrough block, e.g.
4675          * in the typical if (x) return; pattern. */
4676         if (fallthrough_block) {
4677                 if (currently_reachable()) {
4678                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4679                         ir_node *const f_jump = new_Jmp();
4680                         ir_node *const in[]   = { t_jump, f_jump };
4681                         fallthrough_block = new_Block(2, in);
4682                 }
4683                 set_cur_block(fallthrough_block);
4684         }
4685
4686         return NULL;
4687 }
4688
4689 /**
4690  * Add an unconditional jump to the target block.  If the source block is not
4691  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4692  * loops.  This is necessary if the jump potentially enters a loop.
4693  */
4694 static void jump_to(ir_node *const target_block)
4695 {
4696         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4697         add_immBlock_pred(target_block, pred);
4698 }
4699
4700 /**
4701  * Add an unconditional jump to the target block, if the current block is
4702  * reachable and do nothing otherwise.  This is only valid if the jump does not
4703  * enter a loop (a back edge is ok).
4704  */
4705 static void jump_if_reachable(ir_node *const target_block)
4706 {
4707         if (currently_reachable())
4708                 add_immBlock_pred(target_block, new_Jmp());
4709 }
4710
4711 static ir_node *while_statement_to_firm(while_statement_t *statement)
4712 {
4713         create_local_declarations(statement->scope.entities);
4714
4715         /* Create the header block */
4716         ir_node *const header_block = new_immBlock();
4717         jump_to(header_block);
4718
4719         /* Create the condition. */
4720         ir_node      *      body_block;
4721         ir_node      *      false_block;
4722         expression_t *const cond = statement->condition;
4723         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4724                         fold_constant_to_bool(cond)) {
4725                 /* Shortcut for while (true). */
4726                 body_block  = header_block;
4727                 false_block = NULL;
4728
4729                 keep_alive(header_block);
4730                 keep_all_memory(header_block);
4731         } else {
4732                 body_block  = new_immBlock();
4733                 false_block = new_immBlock();
4734
4735                 set_cur_block(header_block);
4736                 create_condition_evaluation(cond, body_block, false_block);
4737                 mature_immBlock(body_block);
4738         }
4739
4740         ir_node *const old_continue_label = continue_label;
4741         ir_node *const old_break_label    = break_label;
4742         continue_label = header_block;
4743         break_label    = false_block;
4744
4745         /* Create the loop body. */
4746         set_cur_block(body_block);
4747         statement_to_firm(statement->body);
4748         jump_if_reachable(header_block);
4749
4750         mature_immBlock(header_block);
4751         assert(false_block == NULL || false_block == break_label);
4752         false_block = break_label;
4753         if (false_block != NULL) {
4754                 mature_immBlock(false_block);
4755         }
4756         set_cur_block(false_block);
4757
4758         assert(continue_label == header_block);
4759         continue_label = old_continue_label;
4760         break_label    = old_break_label;
4761         return NULL;
4762 }
4763
4764 static ir_node *get_break_label(void)
4765 {
4766         if (break_label == NULL) {
4767                 break_label = new_immBlock();
4768         }
4769         return break_label;
4770 }
4771
4772 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4773 {
4774         create_local_declarations(statement->scope.entities);
4775
4776         /* create the header block */
4777         ir_node *header_block = new_immBlock();
4778
4779         /* the loop body */
4780         ir_node *body_block = new_immBlock();
4781         jump_to(body_block);
4782
4783         ir_node *old_continue_label = continue_label;
4784         ir_node *old_break_label    = break_label;
4785         continue_label              = header_block;
4786         break_label                 = NULL;
4787
4788         set_cur_block(body_block);
4789         statement_to_firm(statement->body);
4790         ir_node *const false_block = get_break_label();
4791
4792         assert(continue_label == header_block);
4793         continue_label = old_continue_label;
4794         break_label    = old_break_label;
4795
4796         jump_if_reachable(header_block);
4797
4798         /* create the condition */
4799         mature_immBlock(header_block);
4800         set_cur_block(header_block);
4801
4802         create_condition_evaluation(statement->condition, body_block, false_block);
4803         mature_immBlock(body_block);
4804         mature_immBlock(false_block);
4805
4806         set_cur_block(false_block);
4807         return NULL;
4808 }
4809
4810 static ir_node *for_statement_to_firm(for_statement_t *statement)
4811 {
4812         create_local_declarations(statement->scope.entities);
4813
4814         if (currently_reachable()) {
4815                 entity_t *entity = statement->scope.entities;
4816                 for ( ; entity != NULL; entity = entity->base.next) {
4817                         if (!is_declaration(entity))
4818                                 continue;
4819
4820                         initialize_local_declaration(entity);
4821                 }
4822
4823                 if (statement->initialisation != NULL) {
4824                         expression_to_firm(statement->initialisation);
4825                 }
4826         }
4827
4828         /* Create the header block */
4829         ir_node *const header_block = new_immBlock();
4830         jump_to(header_block);
4831
4832         /* Create the condition. */
4833         ir_node *body_block;
4834         ir_node *false_block;
4835         if (statement->condition != NULL) {
4836                 body_block  = new_immBlock();
4837                 false_block = new_immBlock();
4838
4839                 set_cur_block(header_block);
4840                 create_condition_evaluation(statement->condition, body_block, false_block);
4841                 mature_immBlock(body_block);
4842         } else {
4843                 /* for-ever. */
4844                 body_block  = header_block;
4845                 false_block = NULL;
4846
4847                 keep_alive(header_block);
4848                 keep_all_memory(header_block);
4849         }
4850
4851         /* Create the step block, if necessary. */
4852         ir_node      *      step_block = header_block;
4853         expression_t *const step       = statement->step;
4854         if (step != NULL) {
4855                 step_block = new_immBlock();
4856         }
4857
4858         ir_node *const old_continue_label = continue_label;
4859         ir_node *const old_break_label    = break_label;
4860         continue_label = step_block;
4861         break_label    = false_block;
4862
4863         /* Create the loop body. */
4864         set_cur_block(body_block);
4865         statement_to_firm(statement->body);
4866         jump_if_reachable(step_block);
4867
4868         /* Create the step code. */
4869         if (step != NULL) {
4870                 mature_immBlock(step_block);
4871                 set_cur_block(step_block);
4872                 expression_to_firm(step);
4873                 jump_if_reachable(header_block);
4874         }
4875
4876         mature_immBlock(header_block);
4877         assert(false_block == NULL || false_block == break_label);
4878         false_block = break_label;
4879         if (false_block != NULL) {
4880                 mature_immBlock(false_block);
4881         }
4882         set_cur_block(false_block);
4883
4884         assert(continue_label == step_block);
4885         continue_label = old_continue_label;
4886         break_label    = old_break_label;
4887         return NULL;
4888 }
4889
4890 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4891 {
4892         if (!currently_reachable())
4893                 return NULL;
4894
4895         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4896         ir_node  *jump = new_d_Jmp(dbgi);
4897         add_immBlock_pred(target_block, jump);
4898
4899         set_unreachable_now();
4900         return NULL;
4901 }
4902
4903 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4904 {
4905         /* determine number of cases */
4906         size_t n_cases = 0;
4907         for (case_label_statement_t *l = statement->first_case; l != NULL;
4908              l = l->next) {
4909                 /* default case */
4910                 if (l->expression == NULL)
4911                         continue;
4912                 if (l->is_empty_range)
4913                         continue;
4914                 ++n_cases;
4915         }
4916
4917         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4918         size_t           i   = 0;
4919         for (case_label_statement_t *l = statement->first_case; l != NULL;
4920              l = l->next) {
4921             if (l->expression == NULL) {
4922                         l->pn = pn_Switch_default;
4923                         continue;
4924                 }
4925                 if (l->is_empty_range)
4926                         continue;
4927                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4928                 ir_tarval *max = min;
4929                 long       pn  = (long) i+1;
4930                 if (l->end_range != NULL)
4931                         max = fold_constant_to_tarval(l->end_range);
4932                 ir_switch_table_set(res, i++, min, max, pn);
4933                 l->pn = pn;
4934         }
4935         return res;
4936 }
4937
4938 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4939 {
4940         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4941         ir_node  *switch_node = NULL;
4942
4943         if (currently_reachable()) {
4944                 ir_node *expression = expression_to_firm(statement->expression);
4945                 ir_switch_table *table = create_switch_table(statement);
4946                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4947
4948                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4949         }
4950
4951         set_unreachable_now();
4952
4953         ir_node *const old_switch            = current_switch;
4954         ir_node *const old_break_label       = break_label;
4955         const bool     old_saw_default_label = saw_default_label;
4956         saw_default_label                    = false;
4957         current_switch                       = switch_node;
4958         break_label                          = NULL;
4959
4960         statement_to_firm(statement->body);
4961
4962         if (currently_reachable()) {
4963                 add_immBlock_pred(get_break_label(), new_Jmp());
4964         }
4965
4966         if (!saw_default_label && switch_node) {
4967                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4968                 add_immBlock_pred(get_break_label(), proj);
4969         }
4970
4971         if (break_label != NULL) {
4972                 mature_immBlock(break_label);
4973         }
4974         set_cur_block(break_label);
4975
4976         assert(current_switch == switch_node);
4977         current_switch    = old_switch;
4978         break_label       = old_break_label;
4979         saw_default_label = old_saw_default_label;
4980         return NULL;
4981 }
4982
4983 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4984 {
4985         if (statement->is_empty_range)
4986                 return NULL;
4987
4988         if (current_switch != NULL) {
4989                 ir_node *block = new_immBlock();
4990                 /* Fallthrough from previous case */
4991                 jump_if_reachable(block);
4992
4993                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4994                 add_immBlock_pred(block, proj);
4995                 if (statement->expression == NULL)
4996                         saw_default_label = true;
4997
4998                 mature_immBlock(block);
4999                 set_cur_block(block);
5000         }
5001
5002         return statement_to_firm(statement->statement);
5003 }
5004
5005 static ir_node *label_to_firm(const label_statement_t *statement)
5006 {
5007         ir_node *block = get_label_block(statement->label);
5008         jump_to(block);
5009
5010         set_cur_block(block);
5011         keep_alive(block);
5012         keep_all_memory(block);
5013
5014         return statement_to_firm(statement->statement);
5015 }
5016
5017 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5018 {
5019         if (!currently_reachable())
5020                 return NULL;
5021
5022         ir_node  *const irn  = expression_to_firm(statement->expression);
5023         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5024         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
5025
5026         set_irn_link(ijmp, ijmp_list);
5027         ijmp_list = ijmp;
5028
5029         set_unreachable_now();
5030         return NULL;
5031 }
5032
5033 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5034 {
5035         bool needs_memory = false;
5036
5037         if (statement->is_volatile) {
5038                 needs_memory = true;
5039         }
5040
5041         size_t         n_clobbers = 0;
5042         asm_clobber_t *clobber    = statement->clobbers;
5043         for ( ; clobber != NULL; clobber = clobber->next) {
5044                 const char *clobber_str = clobber->clobber.begin;
5045
5046                 if (!be_is_valid_clobber(clobber_str)) {
5047                         errorf(&statement->base.source_position,
5048                                    "invalid clobber '%s' specified", clobber->clobber);
5049                         continue;
5050                 }
5051
5052                 if (streq(clobber_str, "memory")) {
5053                         needs_memory = true;
5054                         continue;
5055                 }
5056
5057                 ident *id = new_id_from_str(clobber_str);
5058                 obstack_ptr_grow(&asm_obst, id);
5059                 ++n_clobbers;
5060         }
5061         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5062         ident **clobbers = NULL;
5063         if (n_clobbers > 0) {
5064                 clobbers = obstack_finish(&asm_obst);
5065         }
5066
5067         size_t n_inputs  = 0;
5068         asm_argument_t *argument = statement->inputs;
5069         for ( ; argument != NULL; argument = argument->next)
5070                 n_inputs++;
5071         size_t n_outputs = 0;
5072         argument = statement->outputs;
5073         for ( ; argument != NULL; argument = argument->next)
5074                 n_outputs++;
5075
5076         unsigned next_pos = 0;
5077
5078         ir_node *ins[n_inputs + n_outputs + 1];
5079         size_t   in_size = 0;
5080
5081         ir_asm_constraint tmp_in_constraints[n_outputs];
5082
5083         const expression_t *out_exprs[n_outputs];
5084         ir_node            *out_addrs[n_outputs];
5085         size_t              out_size = 0;
5086
5087         argument = statement->outputs;
5088         for ( ; argument != NULL; argument = argument->next) {
5089                 const char *constraints = argument->constraints.begin;
5090                 asm_constraint_flags_t asm_flags
5091                         = be_parse_asm_constraints(constraints);
5092
5093                 {
5094                         source_position_t const *const pos = &statement->base.source_position;
5095                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5096                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5097                         }
5098                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5099                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5100                                 continue;
5101                         }
5102                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5103                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5104                                 continue;
5105                         }
5106                 }
5107
5108                 unsigned pos = next_pos++;
5109                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5110                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5111                         expression_t *expr = argument->expression;
5112                         ir_node      *addr = expression_to_addr(expr);
5113                         /* in+output, construct an artifical same_as constraint on the
5114                          * input */
5115                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5116                                 char     buf[64];
5117                                 ir_node *value = get_value_from_lvalue(expr, addr);
5118
5119                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5120
5121                                 ir_asm_constraint constraint;
5122                                 constraint.pos              = pos;
5123                                 constraint.constraint       = new_id_from_str(buf);
5124                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5125                                 tmp_in_constraints[in_size] = constraint;
5126                                 ins[in_size] = value;
5127
5128                                 ++in_size;
5129                         }
5130
5131                         out_exprs[out_size] = expr;
5132                         out_addrs[out_size] = addr;
5133                         ++out_size;
5134                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5135                         /* pure memory ops need no input (but we have to make sure we
5136                          * attach to the memory) */
5137                         assert(! (asm_flags &
5138                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5139                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5140                         needs_memory = true;
5141
5142                         /* we need to attach the address to the inputs */
5143                         expression_t *expr = argument->expression;
5144
5145                         ir_asm_constraint constraint;
5146                         constraint.pos              = pos;
5147                         constraint.constraint       = new_id_from_str(constraints);
5148                         constraint.mode             = mode_M;
5149                         tmp_in_constraints[in_size] = constraint;
5150
5151                         ins[in_size]          = expression_to_addr(expr);
5152                         ++in_size;
5153                         continue;
5154                 } else {
5155                         errorf(&statement->base.source_position,
5156                                "only modifiers but no place set in constraints '%s'",
5157                                constraints);
5158                         continue;
5159                 }
5160
5161                 ir_asm_constraint constraint;
5162                 constraint.pos        = pos;
5163                 constraint.constraint = new_id_from_str(constraints);
5164                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5165
5166                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5167         }
5168         assert(obstack_object_size(&asm_obst)
5169                         == out_size * sizeof(ir_asm_constraint));
5170         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5171
5172
5173         obstack_grow(&asm_obst, tmp_in_constraints,
5174                      in_size * sizeof(tmp_in_constraints[0]));
5175         /* find and count input and output arguments */
5176         argument = statement->inputs;
5177         for ( ; argument != NULL; argument = argument->next) {
5178                 const char *constraints = argument->constraints.begin;
5179                 asm_constraint_flags_t asm_flags
5180                         = be_parse_asm_constraints(constraints);
5181
5182                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5183                         errorf(&statement->base.source_position,
5184                                "some constraints in '%s' are not supported", constraints);
5185                         continue;
5186                 }
5187                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5188                         errorf(&statement->base.source_position,
5189                                "some constraints in '%s' are invalid", constraints);
5190                         continue;
5191                 }
5192                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5193                         errorf(&statement->base.source_position,
5194                                "write flag specified for input constraints '%s'",
5195                                constraints);
5196                         continue;
5197                 }
5198
5199                 ir_node *input;
5200                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5201                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5202                         /* we can treat this as "normal" input */
5203                         input = expression_to_firm(argument->expression);
5204                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5205                         /* pure memory ops need no input (but we have to make sure we
5206                          * attach to the memory) */
5207                         assert(! (asm_flags &
5208                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5209                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5210                         needs_memory = true;
5211                         input = expression_to_addr(argument->expression);
5212                 } else {
5213                         errorf(&statement->base.source_position,
5214                                "only modifiers but no place set in constraints '%s'",
5215                                constraints);
5216                         continue;
5217                 }
5218
5219                 ir_asm_constraint constraint;
5220                 constraint.pos        = next_pos++;
5221                 constraint.constraint = new_id_from_str(constraints);
5222                 constraint.mode       = get_irn_mode(input);
5223
5224                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5225                 ins[in_size++] = input;
5226         }
5227
5228         if (needs_memory) {
5229                 ir_asm_constraint constraint;
5230                 constraint.pos        = next_pos++;
5231                 constraint.constraint = new_id_from_str("");
5232                 constraint.mode       = mode_M;
5233
5234                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5235                 ins[in_size++] = get_store();
5236         }
5237
5238         assert(obstack_object_size(&asm_obst)
5239                         == in_size * sizeof(ir_asm_constraint));
5240         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5241
5242         /* create asm node */
5243         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5244
5245         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5246
5247         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5248                                   out_size, output_constraints,
5249                                   n_clobbers, clobbers, asm_text);
5250
5251         if (statement->is_volatile) {
5252                 set_irn_pinned(node, op_pin_state_pinned);
5253         } else {
5254                 set_irn_pinned(node, op_pin_state_floats);
5255         }
5256
5257         /* create output projs & connect them */
5258         if (needs_memory) {
5259                 ir_node *projm = new_Proj(node, mode_M, out_size);
5260                 set_store(projm);
5261         }
5262
5263         size_t i;
5264         for (i = 0; i < out_size; ++i) {
5265                 const expression_t *out_expr = out_exprs[i];
5266                 long                pn       = i;
5267                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5268                 ir_node            *proj     = new_Proj(node, mode, pn);
5269                 ir_node            *addr     = out_addrs[i];
5270
5271                 set_value_for_expression_addr(out_expr, proj, addr);
5272         }
5273
5274         return NULL;
5275 }
5276
5277 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5278 {
5279         statement_to_firm(statement->try_statement);
5280         source_position_t const *const pos = &statement->base.source_position;
5281         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5282         return NULL;
5283 }
5284
5285 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5286 {
5287         errorf(&statement->base.source_position, "__leave not supported yet");
5288         return NULL;
5289 }
5290
5291 /**
5292  * Transform a statement.
5293  */
5294 static ir_node *statement_to_firm(statement_t *const stmt)
5295 {
5296 #ifndef NDEBUG
5297         assert(!stmt->base.transformed);
5298         stmt->base.transformed = true;
5299 #endif
5300
5301         switch (stmt->kind) {
5302         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5303         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5304         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5305         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5306         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5307         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5308         case STATEMENT_EMPTY:         return NULL; /* nothing */
5309         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5310         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5311         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5312         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5313         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5314         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5315         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5316         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5317         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5318
5319         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5320         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5321         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5322
5323         case STATEMENT_ERROR: panic("error statement found");
5324         }
5325         panic("statement not implemented");
5326 }
5327
5328 static int count_local_variables(const entity_t *entity,
5329                                  const entity_t *const last)
5330 {
5331         int count = 0;
5332         entity_t const *const end = last != NULL ? last->base.next : NULL;
5333         for (; entity != end; entity = entity->base.next) {
5334                 type_t *type;
5335                 bool    address_taken;
5336
5337                 if (entity->kind == ENTITY_VARIABLE) {
5338                         type          = skip_typeref(entity->declaration.type);
5339                         address_taken = entity->variable.address_taken;
5340                 } else if (entity->kind == ENTITY_PARAMETER) {
5341                         type          = skip_typeref(entity->declaration.type);
5342                         address_taken = entity->parameter.address_taken;
5343                 } else {
5344                         continue;
5345                 }
5346
5347                 if (!address_taken && is_type_scalar(type))
5348                         ++count;
5349         }
5350         return count;
5351 }
5352
5353 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5354 {
5355         int *const count = env;
5356
5357         switch (stmt->kind) {
5358         case STATEMENT_DECLARATION: {
5359                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5360                 *count += count_local_variables(decl_stmt->declarations_begin,
5361                                 decl_stmt->declarations_end);
5362                 break;
5363         }
5364
5365         case STATEMENT_FOR:
5366                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5367                 break;
5368
5369         default:
5370                 break;
5371         }
5372 }
5373
5374 /**
5375  * Return the number of local (alias free) variables used by a function.
5376  */
5377 static int get_function_n_local_vars(entity_t *entity)
5378 {
5379         const function_t *function = &entity->function;
5380         int count = 0;
5381
5382         /* count parameters */
5383         count += count_local_variables(function->parameters.entities, NULL);
5384
5385         /* count local variables declared in body */
5386         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5387         return count;
5388 }
5389
5390 /**
5391  * Build Firm code for the parameters of a function.
5392  */
5393 static void initialize_function_parameters(entity_t *entity)
5394 {
5395         assert(entity->kind == ENTITY_FUNCTION);
5396         ir_graph *irg             = current_ir_graph;
5397         ir_node  *args            = get_irg_args(irg);
5398         int       n               = 0;
5399         ir_type  *function_irtype;
5400
5401         if (entity->function.need_closure) {
5402                 /* add an extra parameter for the static link */
5403                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5404                 ++n;
5405
5406                 /* Matze: IMO this is wrong, nested functions should have an own
5407                  * type and not rely on strange parameters... */
5408                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5409         } else {
5410                 function_irtype = get_ir_type(entity->declaration.type);
5411         }
5412
5413
5414
5415         entity_t *parameter = entity->function.parameters.entities;
5416         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5417                 if (parameter->kind != ENTITY_PARAMETER)
5418                         continue;
5419
5420                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5421                 type_t *type = skip_typeref(parameter->declaration.type);
5422
5423                 bool needs_entity = parameter->parameter.address_taken;
5424                 assert(!is_type_array(type));
5425                 if (is_type_compound(type)) {
5426                         needs_entity = true;
5427                 }
5428
5429                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5430                 if (needs_entity) {
5431                         ir_type   *frame_type = get_irg_frame_type(irg);
5432                         ir_entity *param
5433                                 = new_parameter_entity(frame_type, n, param_irtype);
5434                         parameter->declaration.kind
5435                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5436                         parameter->parameter.v.entity = param;
5437                         continue;
5438                 }
5439
5440                 ir_mode *param_mode = get_type_mode(param_irtype);
5441                 long     pn         = n;
5442                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5443
5444                 ir_mode *mode = get_ir_mode_storage(type);
5445                 value = create_conv(NULL, value, mode);
5446                 value = do_strict_conv(NULL, value);
5447
5448                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5449                 parameter->parameter.v.value_number = next_value_number_function;
5450                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5451                                         parameter);
5452                 ++next_value_number_function;
5453
5454                 set_value(parameter->parameter.v.value_number, value);
5455         }
5456 }
5457
5458 /**
5459  * Handle additional decl modifiers for IR-graphs
5460  *
5461  * @param irg            the IR-graph
5462  * @param dec_modifiers  additional modifiers
5463  */
5464 static void handle_decl_modifier_irg(ir_graph *irg,
5465                                      decl_modifiers_t decl_modifiers)
5466 {
5467         if (decl_modifiers & DM_NAKED) {
5468                 /* TRUE if the declaration includes the Microsoft
5469                    __declspec(naked) specifier. */
5470                 add_irg_additional_properties(irg, mtp_property_naked);
5471         }
5472         if (decl_modifiers & DM_FORCEINLINE) {
5473                 /* TRUE if the declaration includes the
5474                    Microsoft __forceinline specifier. */
5475                 set_irg_inline_property(irg, irg_inline_forced);
5476         }
5477         if (decl_modifiers & DM_NOINLINE) {
5478                 /* TRUE if the declaration includes the Microsoft
5479                    __declspec(noinline) specifier. */
5480                 set_irg_inline_property(irg, irg_inline_forbidden);
5481         }
5482 }
5483
5484 static void add_function_pointer(ir_type *segment, ir_entity *method,
5485                                  const char *unique_template)
5486 {
5487         ir_type   *method_type  = get_entity_type(method);
5488         ir_type   *ptr_type     = new_type_pointer(method_type);
5489
5490         /* these entities don't really have a name but firm only allows
5491          * "" in ld_ident.
5492          * Note that we mustn't give these entities a name since for example
5493          * Mach-O doesn't allow them. */
5494         ident     *ide          = id_unique(unique_template);
5495         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5496         ir_graph  *irg          = get_const_code_irg();
5497         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5498                                                            method);
5499
5500         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5501         set_entity_compiler_generated(ptr, 1);
5502         set_entity_visibility(ptr, ir_visibility_private);
5503         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5504         set_atomic_ent_value(ptr, val);
5505 }
5506
5507 /**
5508  * Generate possible IJmp branches to a given label block.
5509  */
5510 static void gen_ijmp_branches(ir_node *block)
5511 {
5512         ir_node *ijmp;
5513         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5514                 add_immBlock_pred(block, ijmp);
5515         }
5516 }
5517
5518 /**
5519  * Create code for a function and all inner functions.
5520  *
5521  * @param entity  the function entity
5522  */
5523 static void create_function(entity_t *entity)
5524 {
5525         assert(entity->kind == ENTITY_FUNCTION);
5526         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5527
5528         if (entity->function.statement == NULL)
5529                 return;
5530
5531         inner_functions     = NULL;
5532         current_trampolines = NULL;
5533
5534         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5535                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5536                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5537         }
5538         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5539                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5540                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5541         }
5542
5543         current_function_entity = entity;
5544         current_function_name   = NULL;
5545         current_funcsig         = NULL;
5546
5547         assert(all_labels == NULL);
5548         all_labels = NEW_ARR_F(label_t *, 0);
5549         ijmp_list  = NULL;
5550
5551         int       n_local_vars = get_function_n_local_vars(entity);
5552         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5553         current_ir_graph = irg;
5554
5555         ir_graph *old_current_function = current_function;
5556         current_function = irg;
5557
5558         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5559         current_vararg_entity = NULL;
5560
5561         set_irg_fp_model(irg, firm_fp_model);
5562         tarval_enable_fp_ops(1);
5563         set_irn_dbg_info(get_irg_start_block(irg),
5564                          get_entity_dbg_info(function_entity));
5565
5566         /* set inline flags */
5567         if (entity->function.is_inline)
5568                 set_irg_inline_property(irg, irg_inline_recomended);
5569         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5570
5571         next_value_number_function = 0;
5572         initialize_function_parameters(entity);
5573         current_static_link = entity->function.static_link;
5574
5575         statement_to_firm(entity->function.statement);
5576
5577         ir_node *end_block = get_irg_end_block(irg);
5578
5579         /* do we have a return statement yet? */
5580         if (currently_reachable()) {
5581                 type_t *type = skip_typeref(entity->declaration.type);
5582                 assert(is_type_function(type));
5583                 type_t *const return_type = skip_typeref(type->function.return_type);
5584
5585                 ir_node *ret;
5586                 if (is_type_void(return_type)) {
5587                         ret = new_Return(get_store(), 0, NULL);
5588                 } else {
5589                         ir_mode *const mode = get_ir_mode_storage(return_type);
5590
5591                         ir_node *in[1];
5592                         /* §5.1.2.2.3 main implicitly returns 0 */
5593                         if (is_main(entity)) {
5594                                 in[0] = new_Const(get_mode_null(mode));
5595                         } else {
5596                                 in[0] = new_Unknown(mode);
5597                         }
5598                         ret = new_Return(get_store(), 1, in);
5599                 }
5600                 add_immBlock_pred(end_block, ret);
5601         }
5602
5603         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5604                 label_t *label = all_labels[i];
5605                 if (label->address_taken) {
5606                         gen_ijmp_branches(label->block);
5607                 }
5608                 mature_immBlock(label->block);
5609         }
5610
5611         DEL_ARR_F(all_labels);
5612         all_labels = NULL;
5613
5614         irg_finalize_cons(irg);
5615
5616         /* finalize the frame type */
5617         ir_type *frame_type = get_irg_frame_type(irg);
5618         int      n          = get_compound_n_members(frame_type);
5619         int      align_all  = 4;
5620         int      offset     = 0;
5621         for (int i = 0; i < n; ++i) {
5622                 ir_entity *member      = get_compound_member(frame_type, i);
5623                 ir_type   *entity_type = get_entity_type(member);
5624
5625                 int align = get_type_alignment_bytes(entity_type);
5626                 if (align > align_all)
5627                         align_all = align;
5628                 int misalign = 0;
5629                 if (align > 0) {
5630                         misalign  = offset % align;
5631                         if (misalign > 0) {
5632                                 offset += align - misalign;
5633                         }
5634                 }
5635
5636                 set_entity_offset(member, offset);
5637                 offset += get_type_size_bytes(entity_type);
5638         }
5639         set_type_size_bytes(frame_type, offset);
5640         set_type_alignment_bytes(frame_type, align_all);
5641
5642         irg_verify(irg, VERIFY_ENFORCE_SSA);
5643         current_vararg_entity = old_current_vararg_entity;
5644         current_function      = old_current_function;
5645
5646         if (current_trampolines != NULL) {
5647                 DEL_ARR_F(current_trampolines);
5648                 current_trampolines = NULL;
5649         }
5650
5651         /* create inner functions if any */
5652         entity_t **inner = inner_functions;
5653         if (inner != NULL) {
5654                 ir_type *rem_outer_frame      = current_outer_frame;
5655                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5656                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5657                         create_function(inner[i]);
5658                 }
5659                 DEL_ARR_F(inner);
5660
5661                 current_outer_frame      = rem_outer_frame;
5662         }
5663 }
5664
5665 static void scope_to_firm(scope_t *scope)
5666 {
5667         /* first pass: create declarations */
5668         entity_t *entity = scope->entities;
5669         for ( ; entity != NULL; entity = entity->base.next) {
5670                 if (entity->base.symbol == NULL)
5671                         continue;
5672
5673                 if (entity->kind == ENTITY_FUNCTION) {
5674                         if (entity->function.btk != BUILTIN_NONE) {
5675                                 /* builtins have no representation */
5676                                 continue;
5677                         }
5678                         (void)get_function_entity(entity, NULL);
5679                 } else if (entity->kind == ENTITY_VARIABLE) {
5680                         create_global_variable(entity);
5681                 } else if (entity->kind == ENTITY_NAMESPACE) {
5682                         scope_to_firm(&entity->namespacee.members);
5683                 }
5684         }
5685
5686         /* second pass: create code/initializers */
5687         entity = scope->entities;
5688         for ( ; entity != NULL; entity = entity->base.next) {
5689                 if (entity->base.symbol == NULL)
5690                         continue;
5691
5692                 if (entity->kind == ENTITY_FUNCTION) {
5693                         if (entity->function.btk != BUILTIN_NONE) {
5694                                 /* builtins have no representation */
5695                                 continue;
5696                         }
5697                         create_function(entity);
5698                 } else if (entity->kind == ENTITY_VARIABLE) {
5699                         assert(entity->declaration.kind
5700                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5701                         current_ir_graph = get_const_code_irg();
5702                         create_variable_initializer(entity);
5703                 }
5704         }
5705 }
5706
5707 void init_ast2firm(void)
5708 {
5709         obstack_init(&asm_obst);
5710         init_atomic_modes();
5711
5712         ir_set_debug_retrieve(dbg_retrieve);
5713         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5714
5715         /* create idents for all known runtime functions */
5716         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5717                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5718         }
5719
5720         entitymap_init(&entitymap);
5721 }
5722
5723 static void init_ir_types(void)
5724 {
5725         static int ir_types_initialized = 0;
5726         if (ir_types_initialized)
5727                 return;
5728         ir_types_initialized = 1;
5729
5730         ir_type_char       = get_ir_type(type_char);
5731         ir_type_const_char = get_ir_type(type_const_char);
5732         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5733
5734         be_params             = be_get_backend_param();
5735         mode_float_arithmetic = be_params->mode_float_arithmetic;
5736
5737         stack_param_align     = be_params->stack_param_align;
5738 }
5739
5740 void exit_ast2firm(void)
5741 {
5742         entitymap_destroy(&entitymap);
5743         obstack_free(&asm_obst, NULL);
5744 }
5745
5746 static void global_asm_to_firm(statement_t *s)
5747 {
5748         for (; s != NULL; s = s->base.next) {
5749                 assert(s->kind == STATEMENT_ASM);
5750
5751                 char const *const text = s->asms.asm_text.begin;
5752                 size_t            size = s->asms.asm_text.size;
5753
5754                 /* skip the last \0 */
5755                 if (text[size - 1] == '\0')
5756                         --size;
5757
5758                 ident *const id = new_id_from_chars(text, size);
5759                 add_irp_asm(id);
5760         }
5761 }
5762
5763 static const char *get_cwd(void)
5764 {
5765         static char buf[1024];
5766         if (buf[0] == '\0')
5767                 getcwd(buf, sizeof(buf));
5768         return buf;
5769 }
5770
5771 void translation_unit_to_firm(translation_unit_t *unit)
5772 {
5773         if (c_mode & _CXX) {
5774                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5775         } else if (c_mode & _C99) {
5776                 be_dwarf_set_source_language(DW_LANG_C99);
5777         } else if (c_mode & _C89) {
5778                 be_dwarf_set_source_language(DW_LANG_C89);
5779         } else {
5780                 be_dwarf_set_source_language(DW_LANG_C);
5781         }
5782         be_dwarf_set_compilation_directory(get_cwd());
5783
5784         /* initialize firm arithmetic */
5785         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5786         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5787
5788         /* just to be sure */
5789         continue_label           = NULL;
5790         break_label              = NULL;
5791         current_switch           = NULL;
5792         current_translation_unit = unit;
5793
5794         init_ir_types();
5795
5796         scope_to_firm(&unit->scope);
5797         global_asm_to_firm(unit->global_asm);
5798
5799         current_ir_graph         = NULL;
5800         current_translation_unit = NULL;
5801 }