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         unsigned        us     = 0;
1211         unsigned        ls     = 0;
1212         const string_t *suffix = &literal->suffix;
1213         /* parse suffix */
1214         if (suffix->size > 0) {
1215                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1216                         if (*c == 'u' || *c == 'U') { ++us; }
1217                         if (*c == 'l' || *c == 'L') { ++ls; }
1218                 }
1219         }
1220
1221         unsigned base;
1222         switch (literal->base.kind) {
1223                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1224                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1225                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1226                 default: panic("invalid literal kind");
1227         }
1228
1229         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1230
1231         /* now try if the constant is small enough for some types */
1232         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1233         if (ls < 1) {
1234                 if (us == 0 && try_create_integer(literal, type_int, base))
1235                         goto finished;
1236                 if ((us == 1 || base != 10)
1237                                 && try_create_integer(literal, type_unsigned_int, base))
1238                         goto finished;
1239         }
1240         if (ls < 2) {
1241                 if (us == 0 && try_create_integer(literal, type_long, base))
1242                         goto finished;
1243                 if ((us == 1 || base != 10)
1244                                 && try_create_integer(literal, type_unsigned_long, base))
1245                         goto finished;
1246         }
1247         /* last try? then we should not report tarval_bad */
1248         if (us != 1 && base == 10)
1249                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1250         if (us == 0 && try_create_integer(literal, type_long_long, base))
1251                 goto finished;
1252
1253         /* last try */
1254         assert(us == 1 || base != 10);
1255         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1256         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1257         if (!res)
1258                 panic("internal error when parsing number literal");
1259
1260 finished:
1261         tarval_set_integer_overflow_mode(old_mode);
1262 }
1263
1264 void determine_literal_type(literal_expression_t *literal)
1265 {
1266         switch (literal->base.kind) {
1267         case EXPR_LITERAL_INTEGER:
1268         case EXPR_LITERAL_INTEGER_OCTAL:
1269         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1270                 create_integer_tarval(literal);
1271                 return;
1272         default:
1273                 break;
1274         }
1275 }
1276
1277 /**
1278  * Creates a Const node representing a constant.
1279  */
1280 static ir_node *literal_to_firm(const literal_expression_t *literal)
1281 {
1282         type_t     *type   = skip_typeref(literal->base.type);
1283         ir_mode    *mode   = get_ir_mode_storage(type);
1284         const char *string = literal->value.begin;
1285         size_t      size   = literal->value.size;
1286         ir_tarval  *tv;
1287
1288         switch (literal->base.kind) {
1289         case EXPR_LITERAL_WIDE_CHARACTER: {
1290                 utf32  v = read_utf8_char(&string);
1291                 char   buf[128];
1292                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1293
1294                 tv = new_tarval_from_str(buf, len, mode);
1295                 break;
1296         }
1297
1298         case EXPR_LITERAL_CHARACTER: {
1299                 long long int v;
1300                 bool char_is_signed
1301                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1302                 if (size == 1 && char_is_signed) {
1303                         v = (signed char)string[0];
1304                 } else {
1305                         v = 0;
1306                         for (size_t i = 0; i < size; ++i) {
1307                                 v = (v << 8) | ((unsigned char)string[i]);
1308                         }
1309                 }
1310                 char   buf[128];
1311                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1312
1313                 tv = new_tarval_from_str(buf, len, mode);
1314                 break;
1315         }
1316
1317         case EXPR_LITERAL_INTEGER:
1318         case EXPR_LITERAL_INTEGER_OCTAL:
1319         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1320                 assert(literal->target_value != NULL);
1321                 tv = literal->target_value;
1322                 break;
1323
1324         case EXPR_LITERAL_FLOATINGPOINT:
1325                 tv = new_tarval_from_str(string, size, mode);
1326                 break;
1327
1328         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1329                 char buffer[size + 2];
1330                 memcpy(buffer, "0x", 2);
1331                 memcpy(buffer+2, string, size);
1332                 tv = new_tarval_from_str(buffer, size+2, mode);
1333                 break;
1334         }
1335
1336         case EXPR_LITERAL_BOOLEAN:
1337                 if (string[0] == 't') {
1338                         tv = get_mode_one(mode);
1339                 } else {
1340                         assert(string[0] == 'f');
1341         case EXPR_LITERAL_MS_NOOP:
1342                         tv = get_mode_null(mode);
1343                 }
1344                 break;
1345
1346         default:
1347                 panic("Invalid literal kind found");
1348         }
1349
1350         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1351         ir_node  *res        = new_d_Const(dbgi, tv);
1352         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1353         return create_conv(dbgi, res, mode_arith);
1354 }
1355
1356 /*
1357  * Allocate an area of size bytes aligned at alignment
1358  * at a frame type.
1359  */
1360 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1361 {
1362         static unsigned area_cnt = 0;
1363         char buf[32];
1364
1365         ir_type *tp = new_type_array(1, ir_type_char);
1366         set_array_bounds_int(tp, 0, 0, size);
1367         set_type_alignment_bytes(tp, alignment);
1368
1369         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1370         ident *name = new_id_from_str(buf);
1371         ir_entity *area = new_entity(frame_type, name, tp);
1372
1373         /* mark this entity as compiler generated */
1374         set_entity_compiler_generated(area, 1);
1375         return area;
1376 }
1377
1378 /**
1379  * Return a node representing a trampoline region
1380  * for a given function entity.
1381  *
1382  * @param dbgi    debug info
1383  * @param entity  the function entity
1384  */
1385 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1386 {
1387         ir_entity *region = NULL;
1388         int        i;
1389
1390         if (current_trampolines != NULL) {
1391                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1392                         if (current_trampolines[i].function == entity) {
1393                                 region = current_trampolines[i].region;
1394                                 break;
1395                         }
1396                 }
1397         } else {
1398                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1399         }
1400         ir_graph *irg = current_ir_graph;
1401         if (region == NULL) {
1402                 /* create a new region */
1403                 ir_type           *frame_tp = get_irg_frame_type(irg);
1404                 trampoline_region  reg;
1405                 reg.function = entity;
1406
1407                 reg.region   = alloc_trampoline(frame_tp,
1408                                                 be_params->trampoline_size,
1409                                                 be_params->trampoline_align);
1410                 ARR_APP1(trampoline_region, current_trampolines, reg);
1411                 region = reg.region;
1412         }
1413         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1414                                region);
1415 }
1416
1417 /**
1418  * Creates a trampoline for a function represented by an entity.
1419  *
1420  * @param dbgi    debug info
1421  * @param mode    the (reference) mode for the function address
1422  * @param entity  the function entity
1423  */
1424 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1425                                   ir_entity *entity)
1426 {
1427         assert(entity != NULL);
1428         ir_node *in[3];
1429         in[0] = get_trampoline_region(dbgi, entity);
1430         in[1] = create_symconst(dbgi, entity);
1431         in[2] = get_irg_frame(current_ir_graph);
1432
1433         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1434         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1435         return new_Proj(irn, mode, pn_Builtin_max+1);
1436 }
1437
1438 /**
1439  * Dereference an address.
1440  *
1441  * @param dbgi  debug info
1442  * @param type  the type of the dereferenced result (the points_to type)
1443  * @param addr  the address to dereference
1444  */
1445 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1446                                       ir_node *const addr)
1447 {
1448         type_t *skipped = skip_typeref(type);
1449         if (is_type_incomplete(skipped))
1450                 return addr;
1451
1452         ir_type *irtype = get_ir_type(skipped);
1453         if (is_compound_type(irtype)
1454             || is_Method_type(irtype)
1455             || is_Array_type(irtype)) {
1456                 return addr;
1457         }
1458
1459         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1460                                   ? cons_volatile : cons_none;
1461         ir_mode *const mode     = get_type_mode(irtype);
1462         ir_node *const memory   = get_store();
1463         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1464         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1465         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1466
1467         set_store(load_mem);
1468
1469         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1470         return create_conv(dbgi, load_res, mode_arithmetic);
1471 }
1472
1473 /**
1474  * Creates a strict Conv (to the node's mode) if necessary.
1475  *
1476  * @param dbgi  debug info
1477  * @param node  the node to strict conv
1478  */
1479 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1480 {
1481         ir_mode *mode = get_irn_mode(node);
1482
1483         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1484                 return node;
1485         if (!mode_is_float(mode))
1486                 return node;
1487
1488         /* check if there is already a Conv */
1489         if (is_Conv(node)) {
1490                 /* convert it into a strict Conv */
1491                 set_Conv_strict(node, 1);
1492                 return node;
1493         }
1494
1495         /* otherwise create a new one */
1496         return new_d_strictConv(dbgi, node, mode);
1497 }
1498
1499 /**
1500  * Returns the correct base address depending on whether it is a parameter or a
1501  * normal local variable.
1502  */
1503 static ir_node *get_local_frame(ir_entity *const ent)
1504 {
1505         ir_graph      *const irg   = current_ir_graph;
1506         const ir_type *const owner = get_entity_owner(ent);
1507         if (owner == current_outer_frame) {
1508                 assert(current_static_link != NULL);
1509                 return current_static_link;
1510         } else {
1511                 return get_irg_frame(irg);
1512         }
1513 }
1514
1515 /**
1516  * Keep all memory edges of the given block.
1517  */
1518 static void keep_all_memory(ir_node *block)
1519 {
1520         ir_node *old = get_cur_block();
1521
1522         set_cur_block(block);
1523         keep_alive(get_store());
1524         /* TODO: keep all memory edges from restricted pointers */
1525         set_cur_block(old);
1526 }
1527
1528 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1529 {
1530         entity_t *entity = ref->entity;
1531         if (entity->enum_value.tv == NULL) {
1532                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1533                 assert(type->kind == TYPE_ENUM);
1534                 determine_enum_values(&type->enumt);
1535         }
1536
1537         return new_Const(entity->enum_value.tv);
1538 }
1539
1540 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1541 {
1542         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1543         entity_t *entity = ref->entity;
1544         assert(is_declaration(entity));
1545         type_t   *type   = skip_typeref(entity->declaration.type);
1546
1547         /* make sure the type is constructed */
1548         (void) get_ir_type(type);
1549
1550         if (entity->kind == ENTITY_FUNCTION
1551             && entity->function.btk != BUILTIN_NONE) {
1552                 ir_entity *irentity = get_function_entity(entity, NULL);
1553                 /* for gcc compatibility we have to produce (dummy) addresses for some
1554                  * builtins which don't have entities */
1555                 if (irentity == NULL) {
1556                         source_position_t const *const pos = &ref->base.source_position;
1557                         symbol_t          const *const sym = ref->entity->base.symbol;
1558                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1559
1560                         /* simply create a NULL pointer */
1561                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1562                         ir_node  *res  = new_Const(get_mode_null(mode));
1563
1564                         return res;
1565                 }
1566         }
1567
1568         switch ((declaration_kind_t) entity->declaration.kind) {
1569         case DECLARATION_KIND_UNKNOWN:
1570                 break;
1571
1572         case DECLARATION_KIND_LOCAL_VARIABLE: {
1573                 ir_mode *const mode  = get_ir_mode_storage(type);
1574                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1575                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1576         }
1577         case DECLARATION_KIND_PARAMETER: {
1578                 ir_mode *const mode  = get_ir_mode_storage(type);
1579                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1580                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1581         }
1582         case DECLARATION_KIND_FUNCTION: {
1583                 return create_symconst(dbgi, entity->function.irentity);
1584         }
1585         case DECLARATION_KIND_INNER_FUNCTION: {
1586                 ir_mode *const mode = get_ir_mode_storage(type);
1587                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1588                         /* inner function not using the closure */
1589                         return create_symconst(dbgi, entity->function.irentity);
1590                 } else {
1591                         /* need trampoline here */
1592                         return create_trampoline(dbgi, mode, entity->function.irentity);
1593                 }
1594         }
1595         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1596                 const variable_t *variable = &entity->variable;
1597                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1598                 return deref_address(dbgi, variable->base.type, addr);
1599         }
1600
1601         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1602                 ir_entity *irentity = entity->variable.v.entity;
1603                 ir_node   *frame    = get_local_frame(irentity);
1604                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1605                 return deref_address(dbgi, entity->declaration.type, sel);
1606         }
1607         case DECLARATION_KIND_PARAMETER_ENTITY: {
1608                 ir_entity *irentity = entity->parameter.v.entity;
1609                 ir_node   *frame    = get_local_frame(irentity);
1610                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1611                 return deref_address(dbgi, entity->declaration.type, sel);
1612         }
1613
1614         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1615                 return entity->variable.v.vla_base;
1616
1617         case DECLARATION_KIND_COMPOUND_MEMBER:
1618                 panic("not implemented reference type");
1619         }
1620
1621         panic("reference to declaration with unknown type found");
1622 }
1623
1624 static ir_node *reference_addr(const reference_expression_t *ref)
1625 {
1626         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1627         entity_t *entity = ref->entity;
1628         assert(is_declaration(entity));
1629
1630         switch((declaration_kind_t) entity->declaration.kind) {
1631         case DECLARATION_KIND_UNKNOWN:
1632                 break;
1633         case DECLARATION_KIND_PARAMETER:
1634         case DECLARATION_KIND_LOCAL_VARIABLE:
1635                 /* you can store to a local variable (so we don't panic but return NULL
1636                  * as an indicator for no real address) */
1637                 return NULL;
1638         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1639                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1640                 return addr;
1641         }
1642         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1643                 ir_entity *irentity = entity->variable.v.entity;
1644                 ir_node   *frame    = get_local_frame(irentity);
1645                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1646
1647                 return sel;
1648         }
1649         case DECLARATION_KIND_PARAMETER_ENTITY: {
1650                 ir_entity *irentity = entity->parameter.v.entity;
1651                 ir_node   *frame    = get_local_frame(irentity);
1652                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1653
1654                 return sel;
1655         }
1656
1657         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1658                 return entity->variable.v.vla_base;
1659
1660         case DECLARATION_KIND_FUNCTION: {
1661                 return create_symconst(dbgi, entity->function.irentity);
1662         }
1663
1664         case DECLARATION_KIND_INNER_FUNCTION: {
1665                 type_t  *const type = skip_typeref(entity->declaration.type);
1666                 ir_mode *const mode = get_ir_mode_storage(type);
1667                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1668                         /* inner function not using the closure */
1669                         return create_symconst(dbgi, entity->function.irentity);
1670                 } else {
1671                         /* need trampoline here */
1672                         return create_trampoline(dbgi, mode, entity->function.irentity);
1673                 }
1674         }
1675
1676         case DECLARATION_KIND_COMPOUND_MEMBER:
1677                 panic("not implemented reference type");
1678         }
1679
1680         panic("reference to declaration with unknown type found");
1681 }
1682
1683 /**
1684  * Transform calls to builtin functions.
1685  */
1686 static ir_node *process_builtin_call(const call_expression_t *call)
1687 {
1688         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1689
1690         assert(call->function->kind == EXPR_REFERENCE);
1691         reference_expression_t *builtin = &call->function->reference;
1692
1693         type_t *expr_type = skip_typeref(builtin->base.type);
1694         assert(is_type_pointer(expr_type));
1695
1696         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1697
1698         switch (builtin->entity->function.btk) {
1699         case BUILTIN_NONE:
1700                 break;
1701         case BUILTIN_ALLOCA: {
1702                 expression_t *argument = call->arguments->expression;
1703                 ir_node      *size     = expression_to_firm(argument);
1704
1705                 ir_node *store  = get_store();
1706                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1707                                               stack_alloc);
1708                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1709                 set_store(proj_m);
1710                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1711
1712                 return res;
1713         }
1714         case BUILTIN_INF: {
1715                 type_t    *type = function_type->function.return_type;
1716                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1717                 ir_tarval *tv   = get_mode_infinite(mode);
1718                 ir_node   *res  = new_d_Const(dbgi, tv);
1719                 return res;
1720         }
1721         case BUILTIN_NAN: {
1722                 /* Ignore string for now... */
1723                 assert(is_type_function(function_type));
1724                 type_t    *type = function_type->function.return_type;
1725                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1726                 ir_tarval *tv   = get_mode_NAN(mode);
1727                 ir_node   *res  = new_d_Const(dbgi, tv);
1728                 return res;
1729         }
1730         case BUILTIN_EXPECT: {
1731                 expression_t *argument = call->arguments->expression;
1732                 return _expression_to_firm(argument);
1733         }
1734         case BUILTIN_VA_END:
1735                 /* evaluate the argument of va_end for its side effects */
1736                 _expression_to_firm(call->arguments->expression);
1737                 return NULL;
1738         case BUILTIN_OBJECT_SIZE: {
1739                 /* determine value of "type" */
1740                 expression_t *type_expression = call->arguments->next->expression;
1741                 long          type_val        = fold_constant_to_int(type_expression);
1742                 type_t       *type            = function_type->function.return_type;
1743                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1744                 /* just produce a "I don't know" result */
1745                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1746                                                 get_mode_minus_one(mode);
1747
1748                 return new_d_Const(dbgi, result);
1749         }
1750         case BUILTIN_ROTL: {
1751                 ir_node *val  = expression_to_firm(call->arguments->expression);
1752                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1753                 ir_mode *mode = get_irn_mode(val);
1754                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1755                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1756         }
1757         case BUILTIN_ROTR: {
1758                 ir_node *val  = expression_to_firm(call->arguments->expression);
1759                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1760                 ir_mode *mode = get_irn_mode(val);
1761                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1762                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1763                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1764                 return new_d_Rotl(dbgi, val, sub, mode);
1765         }
1766         case BUILTIN_FIRM:
1767                 break;
1768         case BUILTIN_LIBC:
1769         case BUILTIN_LIBC_CHECK:
1770                 panic("builtin did not produce an entity");
1771         }
1772         panic("invalid builtin found");
1773 }
1774
1775 /**
1776  * Transform a call expression.
1777  * Handles some special cases, like alloca() calls, which must be resolved
1778  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1779  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1780  * handled right...
1781  */
1782 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1783 {
1784         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1785         assert(currently_reachable());
1786
1787         expression_t   *function = call->function;
1788         ir_node        *callee   = NULL;
1789         bool            firm_builtin = false;
1790         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1791         if (function->kind == EXPR_REFERENCE) {
1792                 const reference_expression_t *ref    = &function->reference;
1793                 entity_t                     *entity = ref->entity;
1794
1795                 if (entity->kind == ENTITY_FUNCTION) {
1796                         builtin_kind_t builtin = entity->function.btk;
1797                         if (builtin == BUILTIN_FIRM) {
1798                                 firm_builtin = true;
1799                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1800                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1801                                    && builtin != BUILTIN_LIBC_CHECK) {
1802                                 return process_builtin_call(call);
1803                         }
1804                 }
1805         }
1806         if (!firm_builtin)
1807                 callee = expression_to_firm(function);
1808
1809         type_t *type = skip_typeref(function->base.type);
1810         assert(is_type_pointer(type));
1811         pointer_type_t *pointer_type = &type->pointer;
1812         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1813         assert(is_type_function(points_to));
1814         function_type_t *function_type = &points_to->function;
1815
1816         int      n_parameters    = 0;
1817         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1818         ir_type *new_method_type = NULL;
1819         if (function_type->variadic || function_type->unspecified_parameters) {
1820                 const call_argument_t *argument = call->arguments;
1821                 for ( ; argument != NULL; argument = argument->next) {
1822                         ++n_parameters;
1823                 }
1824
1825                 /* we need to construct a new method type matching the call
1826                  * arguments... */
1827                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1828                 int n_res       = get_method_n_ress(ir_method_type);
1829                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1830                 set_method_calling_convention(new_method_type,
1831                                get_method_calling_convention(ir_method_type));
1832                 set_method_additional_properties(new_method_type,
1833                                get_method_additional_properties(ir_method_type));
1834                 set_method_variadicity(new_method_type,
1835                                        get_method_variadicity(ir_method_type));
1836
1837                 for (int i = 0; i < n_res; ++i) {
1838                         set_method_res_type(new_method_type, i,
1839                                             get_method_res_type(ir_method_type, i));
1840                 }
1841                 argument = call->arguments;
1842                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1843                         expression_t *expression = argument->expression;
1844                         ir_type      *irtype     = get_ir_type(expression->base.type);
1845                         set_method_param_type(new_method_type, i, irtype);
1846                 }
1847                 ir_method_type = new_method_type;
1848         } else {
1849                 n_parameters = get_method_n_params(ir_method_type);
1850         }
1851
1852         ir_node *in[n_parameters];
1853
1854         const call_argument_t *argument = call->arguments;
1855         for (int n = 0; n < n_parameters; ++n) {
1856                 expression_t *expression = argument->expression;
1857                 ir_node      *arg_node   = expression_to_firm(expression);
1858
1859                 type_t *arg_type = skip_typeref(expression->base.type);
1860                 if (!is_type_compound(arg_type)) {
1861                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1862                         arg_node = create_conv(dbgi, arg_node, mode);
1863                         arg_node = do_strict_conv(dbgi, arg_node);
1864                 }
1865
1866                 in[n] = arg_node;
1867
1868                 argument = argument->next;
1869         }
1870
1871         ir_node *store;
1872         if (function_type->modifiers & DM_CONST) {
1873                 store = get_irg_no_mem(current_ir_graph);
1874         } else {
1875                 store = get_store();
1876         }
1877
1878         ir_node *node;
1879         type_t  *return_type = skip_typeref(function_type->return_type);
1880         ir_node *result      = NULL;
1881         if (firm_builtin) {
1882                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1883                                      ir_method_type);
1884                 if (! (function_type->modifiers & DM_CONST)) {
1885                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1886                         set_store(mem);
1887                 }
1888
1889                 if (!is_type_void(return_type)) {
1890                         assert(is_type_scalar(return_type));
1891                         ir_mode *mode = get_ir_mode_storage(return_type);
1892                         result = new_Proj(node, mode, pn_Builtin_max+1);
1893                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1894                         result              = create_conv(NULL, result, mode_arith);
1895                 }
1896         } else {
1897                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1898                 if (! (function_type->modifiers & DM_CONST)) {
1899                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1900                         set_store(mem);
1901                 }
1902
1903                 if (!is_type_void(return_type)) {
1904                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1905                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1906                         result                    = new_Proj(resproj, mode, 0);
1907                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1908                         result                    = create_conv(NULL, result, mode_arith);
1909                 }
1910         }
1911
1912         if (function_type->modifiers & DM_NORETURN) {
1913                 /* A dead end:  Keep the Call and the Block.  Also place all further
1914                  * nodes into a new and unreachable block. */
1915                 keep_alive(node);
1916                 keep_alive(get_cur_block());
1917                 ir_node *block = new_Block(0, NULL);
1918                 set_cur_block(block);
1919         }
1920
1921         return result;
1922 }
1923
1924 static ir_node *statement_to_firm(statement_t *statement);
1925 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1926
1927 static ir_node *expression_to_addr(const expression_t *expression);
1928 static ir_node *create_condition_evaluation(const expression_t *expression,
1929                                             ir_node *true_block,
1930                                             ir_node *false_block);
1931
1932 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1933                          ir_node *value)
1934 {
1935         if (!is_type_compound(type)) {
1936                 ir_mode *mode = get_ir_mode_storage(type);
1937                 value         = create_conv(dbgi, value, mode);
1938                 value         = do_strict_conv(dbgi, value);
1939         }
1940
1941         ir_node *memory = get_store();
1942
1943         if (is_type_scalar(type)) {
1944                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1945                                       ? cons_volatile : cons_none;
1946                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1947                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1948                 set_store(store_mem);
1949         } else {
1950                 ir_type *irtype    = get_ir_type(type);
1951                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1952                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1953                 set_store(copyb_mem);
1954         }
1955 }
1956
1957 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1958 {
1959         ir_tarval *all_one   = get_mode_all_one(mode);
1960         int        mode_size = get_mode_size_bits(mode);
1961         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1962
1963         assert(offset >= 0);
1964         assert(size   >= 0);
1965         assert(offset + size <= mode_size);
1966         if (size == mode_size) {
1967                 return all_one;
1968         }
1969
1970         long       shiftr    = get_mode_size_bits(mode) - size;
1971         long       shiftl    = offset;
1972         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1973         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1974         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1975         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1976
1977         return mask1;
1978 }
1979
1980 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1981                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1982                 bool need_return)
1983 {
1984         ir_type *entity_type = get_entity_type(entity);
1985         ir_type *base_type   = get_primitive_base_type(entity_type);
1986         ir_mode *mode        = get_type_mode(base_type);
1987         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1988
1989         value = create_conv(dbgi, value, mode);
1990
1991         /* kill upper bits of value and shift to right position */
1992         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1993         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1994         unsigned  base_bits  = get_mode_size_bits(mode);
1995         unsigned  shiftwidth = base_bits - bitsize;
1996
1997         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1998         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1999
2000         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
2001         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
2002         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
2003
2004         /* load current value */
2005         ir_node   *mem             = get_store();
2006         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2007                                           set_volatile ? cons_volatile : cons_none);
2008         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2009         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2010         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2011         ir_tarval *inv_mask        = tarval_not(shift_mask);
2012         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2013         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2014
2015         /* construct new value and store */
2016         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2017         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2018                                          set_volatile ? cons_volatile : cons_none);
2019         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2020         set_store(store_mem);
2021
2022         if (!need_return)
2023                 return NULL;
2024
2025         ir_node *res_shr;
2026         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2027         if (mode_is_signed(mode)) {
2028                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2029         } else {
2030                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2031         }
2032         return res_shr;
2033 }
2034
2035 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2036                                          ir_node *addr)
2037 {
2038         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2039         entity_t *entity    = expression->compound_entry;
2040         type_t   *base_type = entity->declaration.type;
2041         ir_mode  *mode      = get_ir_mode_storage(base_type);
2042         ir_node  *mem       = get_store();
2043         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2044         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2045         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2046         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2047
2048         ir_mode  *amode     = mode;
2049         /* optimisation, since shifting in modes < machine_size is usually
2050          * less efficient */
2051         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2052                 amode = mode_uint;
2053         }
2054         unsigned amode_size = get_mode_size_bits(amode);
2055         load_res = create_conv(dbgi, load_res, amode);
2056
2057         set_store(load_mem);
2058
2059         /* kill upper bits */
2060         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2061         unsigned   bitoffset   = entity->compound_member.bit_offset;
2062         unsigned   bitsize     = entity->compound_member.bit_size;
2063         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2064         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2065         ir_node   *countl      = new_d_Const(dbgi, tvl);
2066         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2067
2068         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2069         assert(shift_bitsr <= amode_size);
2070         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2071         ir_node   *countr      = new_d_Const(dbgi, tvr);
2072         ir_node   *shiftr;
2073         if (mode_is_signed(mode)) {
2074                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2075         } else {
2076                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2077         }
2078
2079         type_t  *type    = expression->base.type;
2080         ir_mode *resmode = get_ir_mode_arithmetic(type);
2081         return create_conv(dbgi, shiftr, resmode);
2082 }
2083
2084 /* make sure the selected compound type is constructed */
2085 static void construct_select_compound(const select_expression_t *expression)
2086 {
2087         type_t *type = skip_typeref(expression->compound->base.type);
2088         if (is_type_pointer(type)) {
2089                 type = type->pointer.points_to;
2090         }
2091         (void) get_ir_type(type);
2092 }
2093
2094 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2095                                               ir_node *value, ir_node *addr)
2096 {
2097         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2098         type_t   *type = skip_typeref(expression->base.type);
2099
2100         if (!is_type_compound(type)) {
2101                 ir_mode  *mode = get_ir_mode_storage(type);
2102                 value          = create_conv(dbgi, value, mode);
2103                 value          = do_strict_conv(dbgi, value);
2104         }
2105
2106         if (expression->kind == EXPR_REFERENCE) {
2107                 const reference_expression_t *ref = &expression->reference;
2108
2109                 entity_t *entity = ref->entity;
2110                 assert(is_declaration(entity));
2111                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2112                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2113                         set_value(entity->variable.v.value_number, value);
2114                         return value;
2115                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2116                         set_value(entity->parameter.v.value_number, value);
2117                         return value;
2118                 }
2119         }
2120
2121         if (addr == NULL)
2122                 addr = expression_to_addr(expression);
2123         assert(addr != NULL);
2124
2125         if (expression->kind == EXPR_SELECT) {
2126                 const select_expression_t *select = &expression->select;
2127
2128                 construct_select_compound(select);
2129
2130                 entity_t *entity = select->compound_entry;
2131                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2132                 if (entity->compound_member.bitfield) {
2133                         ir_entity *irentity = entity->compound_member.entity;
2134                         bool       set_volatile
2135                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2136                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2137                                                        set_volatile, true);
2138                         return value;
2139                 }
2140         }
2141
2142         assign_value(dbgi, addr, type, value);
2143         return value;
2144 }
2145
2146 static void set_value_for_expression(const expression_t *expression,
2147                                      ir_node *value)
2148 {
2149         set_value_for_expression_addr(expression, value, NULL);
2150 }
2151
2152 static ir_node *get_value_from_lvalue(const expression_t *expression,
2153                                       ir_node *addr)
2154 {
2155         if (expression->kind == EXPR_REFERENCE) {
2156                 const reference_expression_t *ref = &expression->reference;
2157
2158                 entity_t *entity = ref->entity;
2159                 assert(entity->kind == ENTITY_VARIABLE
2160                                 || entity->kind == ENTITY_PARAMETER);
2161                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2162                 int value_number;
2163                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2164                         value_number = entity->variable.v.value_number;
2165                         assert(addr == NULL);
2166                         type_t  *type = skip_typeref(expression->base.type);
2167                         ir_mode *mode = get_ir_mode_storage(type);
2168                         ir_node *res  = get_value(value_number, mode);
2169                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2170                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2171                         value_number = entity->parameter.v.value_number;
2172                         assert(addr == NULL);
2173                         type_t  *type = skip_typeref(expression->base.type);
2174                         ir_mode *mode = get_ir_mode_storage(type);
2175                         ir_node *res  = get_value(value_number, mode);
2176                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2177                 }
2178         }
2179
2180         assert(addr != NULL);
2181         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2182
2183         ir_node *value;
2184         if (expression->kind == EXPR_SELECT &&
2185             expression->select.compound_entry->compound_member.bitfield) {
2186             construct_select_compound(&expression->select);
2187                 value = bitfield_extract_to_firm(&expression->select, addr);
2188         } else {
2189                 value = deref_address(dbgi, expression->base.type, addr);
2190         }
2191
2192         return value;
2193 }
2194
2195
2196 static ir_node *create_incdec(const unary_expression_t *expression)
2197 {
2198         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2199         const expression_t *value_expr = expression->value;
2200         ir_node            *addr       = expression_to_addr(value_expr);
2201         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2202
2203         type_t  *type = skip_typeref(expression->base.type);
2204         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2205
2206         ir_node *offset;
2207         if (is_type_pointer(type)) {
2208                 pointer_type_t *pointer_type = &type->pointer;
2209                 offset = get_type_size_node(pointer_type->points_to);
2210         } else {
2211                 assert(is_type_arithmetic(type));
2212                 offset = new_Const(get_mode_one(mode));
2213         }
2214
2215         ir_node *result;
2216         ir_node *store_value;
2217         switch(expression->base.kind) {
2218         case EXPR_UNARY_POSTFIX_INCREMENT:
2219                 result      = value;
2220                 store_value = new_d_Add(dbgi, value, offset, mode);
2221                 break;
2222         case EXPR_UNARY_POSTFIX_DECREMENT:
2223                 result      = value;
2224                 store_value = new_d_Sub(dbgi, value, offset, mode);
2225                 break;
2226         case EXPR_UNARY_PREFIX_INCREMENT:
2227                 result      = new_d_Add(dbgi, value, offset, mode);
2228                 store_value = result;
2229                 break;
2230         case EXPR_UNARY_PREFIX_DECREMENT:
2231                 result      = new_d_Sub(dbgi, value, offset, mode);
2232                 store_value = result;
2233                 break;
2234         default:
2235                 panic("no incdec expr in create_incdec");
2236         }
2237
2238         set_value_for_expression_addr(value_expr, store_value, addr);
2239
2240         return result;
2241 }
2242
2243 static bool is_local_variable(expression_t *expression)
2244 {
2245         if (expression->kind != EXPR_REFERENCE)
2246                 return false;
2247         reference_expression_t *ref_expr = &expression->reference;
2248         entity_t               *entity   = ref_expr->entity;
2249         if (entity->kind != ENTITY_VARIABLE)
2250                 return false;
2251         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2252         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2253 }
2254
2255 static ir_relation get_relation(const expression_kind_t kind)
2256 {
2257         switch(kind) {
2258         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2259         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2260         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2261         case EXPR_BINARY_ISLESS:
2262         case EXPR_BINARY_LESS:          return ir_relation_less;
2263         case EXPR_BINARY_ISLESSEQUAL:
2264         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2265         case EXPR_BINARY_ISGREATER:
2266         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2267         case EXPR_BINARY_ISGREATEREQUAL:
2268         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2269         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2270
2271         default:
2272                 break;
2273         }
2274         panic("trying to get pn_Cmp from non-comparison binexpr type");
2275 }
2276
2277 /**
2278  * Handle the assume optimizer hint: check if a Confirm
2279  * node can be created.
2280  *
2281  * @param dbi    debug info
2282  * @param expr   the IL assume expression
2283  *
2284  * we support here only some simple cases:
2285  *  - var rel const
2286  *  - const rel val
2287  *  - var rel var
2288  */
2289 static ir_node *handle_assume_compare(dbg_info *dbi,
2290                                       const binary_expression_t *expression)
2291 {
2292         expression_t *op1 = expression->left;
2293         expression_t *op2 = expression->right;
2294         entity_t     *var2, *var = NULL;
2295         ir_node      *res      = NULL;
2296         ir_relation   relation = get_relation(expression->base.kind);
2297
2298         if (is_local_variable(op1) && is_local_variable(op2)) {
2299                 var  = op1->reference.entity;
2300             var2 = op2->reference.entity;
2301
2302                 type_t  *const type = skip_typeref(var->declaration.type);
2303                 ir_mode *const mode = get_ir_mode_storage(type);
2304
2305                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2306                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2307
2308                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2309                 set_value(var2->variable.v.value_number, res);
2310
2311                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2312                 set_value(var->variable.v.value_number, res);
2313
2314                 return res;
2315         }
2316
2317         expression_t *con = NULL;
2318         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2319                 var = op1->reference.entity;
2320                 con = op2;
2321         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2322                 relation = get_inversed_relation(relation);
2323                 var = op2->reference.entity;
2324                 con = op1;
2325         }
2326
2327         if (var != NULL) {
2328                 type_t  *const type = skip_typeref(var->declaration.type);
2329                 ir_mode *const mode = get_ir_mode_storage(type);
2330
2331                 res = get_value(var->variable.v.value_number, mode);
2332                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2333                 set_value(var->variable.v.value_number, res);
2334         }
2335         return res;
2336 }
2337
2338 /**
2339  * Handle the assume optimizer hint.
2340  *
2341  * @param dbi    debug info
2342  * @param expr   the IL assume expression
2343  */
2344 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2345 {
2346         switch(expression->kind) {
2347         case EXPR_BINARY_EQUAL:
2348         case EXPR_BINARY_NOTEQUAL:
2349         case EXPR_BINARY_LESS:
2350         case EXPR_BINARY_LESSEQUAL:
2351         case EXPR_BINARY_GREATER:
2352         case EXPR_BINARY_GREATEREQUAL:
2353                 return handle_assume_compare(dbi, &expression->binary);
2354         default:
2355                 return NULL;
2356         }
2357 }
2358
2359 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2360                             type_t *from_type, type_t *type)
2361 {
2362         type = skip_typeref(type);
2363         if (is_type_void(type)) {
2364                 /* make sure firm type is constructed */
2365                 (void) get_ir_type(type);
2366                 return NULL;
2367         }
2368         if (!is_type_scalar(type)) {
2369                 /* make sure firm type is constructed */
2370                 (void) get_ir_type(type);
2371                 return value_node;
2372         }
2373
2374         from_type     = skip_typeref(from_type);
2375         ir_mode *mode = get_ir_mode_storage(type);
2376         /* check for conversion from / to __based types */
2377         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2378                 const variable_t *from_var = from_type->pointer.base_variable;
2379                 const variable_t *to_var   = type->pointer.base_variable;
2380                 if (from_var != to_var) {
2381                         if (from_var != NULL) {
2382                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2383                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2384                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2385                         }
2386                         if (to_var != NULL) {
2387                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2388                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2389                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2390                         }
2391                 }
2392         }
2393
2394         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2395                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2396                  * convert to mode_b so we only get a 0/1 value */
2397                 value_node = create_conv(dbgi, value_node, mode_b);
2398         }
2399
2400         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2401         ir_node *node       = create_conv(dbgi, value_node, mode);
2402         node                = do_strict_conv(dbgi, node);
2403         node                = create_conv(dbgi, node, mode_arith);
2404
2405         return node;
2406 }
2407
2408 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2409 {
2410         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2411         type_t   *type = skip_typeref(expression->base.type);
2412
2413         const expression_t *value = expression->value;
2414
2415         switch(expression->base.kind) {
2416         case EXPR_UNARY_TAKE_ADDRESS:
2417                 return expression_to_addr(value);
2418
2419         case EXPR_UNARY_NEGATE: {
2420                 ir_node *value_node = expression_to_firm(value);
2421                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2422                 return new_d_Minus(dbgi, value_node, mode);
2423         }
2424         case EXPR_UNARY_PLUS:
2425                 return expression_to_firm(value);
2426         case EXPR_UNARY_BITWISE_NEGATE: {
2427                 ir_node *value_node = expression_to_firm(value);
2428                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2429                 return new_d_Not(dbgi, value_node, mode);
2430         }
2431         case EXPR_UNARY_NOT: {
2432                 ir_node *value_node = _expression_to_firm(value);
2433                 value_node          = create_conv(dbgi, value_node, mode_b);
2434                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2435                 return res;
2436         }
2437         case EXPR_UNARY_DEREFERENCE: {
2438                 ir_node *value_node = expression_to_firm(value);
2439                 type_t  *value_type = skip_typeref(value->base.type);
2440                 assert(is_type_pointer(value_type));
2441
2442                 /* check for __based */
2443                 const variable_t *const base_var = value_type->pointer.base_variable;
2444                 if (base_var != NULL) {
2445                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2446                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2447                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2448                 }
2449                 type_t  *points_to  = value_type->pointer.points_to;
2450                 return deref_address(dbgi, points_to, value_node);
2451         }
2452         case EXPR_UNARY_POSTFIX_INCREMENT:
2453         case EXPR_UNARY_POSTFIX_DECREMENT:
2454         case EXPR_UNARY_PREFIX_INCREMENT:
2455         case EXPR_UNARY_PREFIX_DECREMENT:
2456                 return create_incdec(expression);
2457         case EXPR_UNARY_CAST: {
2458                 ir_node *value_node = expression_to_firm(value);
2459                 type_t  *from_type  = value->base.type;
2460                 return create_cast(dbgi, value_node, from_type, type);
2461         }
2462         case EXPR_UNARY_ASSUME:
2463                 return handle_assume(dbgi, value);
2464
2465         default:
2466                 break;
2467         }
2468         panic("invalid UNEXPR type found");
2469 }
2470
2471 /**
2472  * produces a 0/1 depending of the value of a mode_b node
2473  */
2474 static ir_node *produce_condition_result(const expression_t *expression,
2475                                          ir_mode *mode, dbg_info *dbgi)
2476 {
2477         ir_node *const one_block  = new_immBlock();
2478         ir_node *const zero_block = new_immBlock();
2479         create_condition_evaluation(expression, one_block, zero_block);
2480         mature_immBlock(one_block);
2481         mature_immBlock(zero_block);
2482
2483         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2484         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2485         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2486         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2487         set_cur_block(block);
2488
2489         ir_node *const one   = new_Const(get_mode_one(mode));
2490         ir_node *const zero  = new_Const(get_mode_null(mode));
2491         ir_node *const in[2] = { one, zero };
2492         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2493
2494         return val;
2495 }
2496
2497 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2498                 ir_node *value, type_t *type)
2499 {
2500         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2501         assert(is_type_pointer(type));
2502         pointer_type_t *const pointer_type = &type->pointer;
2503         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2504         ir_node        *      elem_size    = get_type_size_node(points_to);
2505         elem_size                          = create_conv(dbgi, elem_size, mode);
2506         value                              = create_conv(dbgi, value,     mode);
2507         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2508         return mul;
2509 }
2510
2511 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2512                           ir_node *left, ir_node *right)
2513 {
2514         ir_mode  *mode;
2515         type_t   *type_left  = skip_typeref(expression->left->base.type);
2516         type_t   *type_right = skip_typeref(expression->right->base.type);
2517
2518         expression_kind_t kind = expression->base.kind;
2519
2520         switch (kind) {
2521         case EXPR_BINARY_SHIFTLEFT:
2522         case EXPR_BINARY_SHIFTRIGHT:
2523         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2524         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2525                 mode  = get_ir_mode_arithmetic(expression->base.type);
2526                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2527                 break;
2528
2529         case EXPR_BINARY_SUB:
2530                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2531                         const pointer_type_t *const ptr_type = &type_left->pointer;
2532
2533                         mode = get_ir_mode_arithmetic(expression->base.type);
2534                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2535                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2536                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2537                         ir_node *const no_mem    = new_NoMem();
2538                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2539                                                                                                    mode, op_pin_state_floats);
2540                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2541                 }
2542                 /* fallthrough */
2543         case EXPR_BINARY_SUB_ASSIGN:
2544                 if (is_type_pointer(type_left)) {
2545                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2546                         mode  = get_ir_mode_arithmetic(type_left);
2547                         break;
2548                 }
2549                 goto normal_node;
2550
2551         case EXPR_BINARY_ADD:
2552         case EXPR_BINARY_ADD_ASSIGN:
2553                 if (is_type_pointer(type_left)) {
2554                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2555                         mode  = get_ir_mode_arithmetic(type_left);
2556                         break;
2557                 } else if (is_type_pointer(type_right)) {
2558                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2559                         mode  = get_ir_mode_arithmetic(type_right);
2560                         break;
2561                 }
2562                 goto normal_node;
2563
2564         default:
2565 normal_node:
2566                 mode = get_ir_mode_arithmetic(type_right);
2567                 left = create_conv(dbgi, left, mode);
2568                 break;
2569         }
2570
2571         switch (kind) {
2572         case EXPR_BINARY_ADD_ASSIGN:
2573         case EXPR_BINARY_ADD:
2574                 return new_d_Add(dbgi, left, right, mode);
2575         case EXPR_BINARY_SUB_ASSIGN:
2576         case EXPR_BINARY_SUB:
2577                 return new_d_Sub(dbgi, left, right, mode);
2578         case EXPR_BINARY_MUL_ASSIGN:
2579         case EXPR_BINARY_MUL:
2580                 return new_d_Mul(dbgi, left, right, mode);
2581         case EXPR_BINARY_BITWISE_AND:
2582         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2583                 return new_d_And(dbgi, left, right, mode);
2584         case EXPR_BINARY_BITWISE_OR:
2585         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2586                 return new_d_Or(dbgi, left, right, mode);
2587         case EXPR_BINARY_BITWISE_XOR:
2588         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2589                 return new_d_Eor(dbgi, left, right, mode);
2590         case EXPR_BINARY_SHIFTLEFT:
2591         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2592                 return new_d_Shl(dbgi, left, right, mode);
2593         case EXPR_BINARY_SHIFTRIGHT:
2594         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2595                 if (mode_is_signed(mode)) {
2596                         return new_d_Shrs(dbgi, left, right, mode);
2597                 } else {
2598                         return new_d_Shr(dbgi, left, right, mode);
2599                 }
2600         case EXPR_BINARY_DIV:
2601         case EXPR_BINARY_DIV_ASSIGN: {
2602                 ir_node *pin = new_Pin(new_NoMem());
2603                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2604                                          op_pin_state_floats);
2605                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2606                 return res;
2607         }
2608         case EXPR_BINARY_MOD:
2609         case EXPR_BINARY_MOD_ASSIGN: {
2610                 ir_node *pin = new_Pin(new_NoMem());
2611                 assert(!mode_is_float(mode));
2612                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2613                                          op_pin_state_floats);
2614                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2615                 return res;
2616         }
2617         default:
2618                 panic("unexpected expression kind");
2619         }
2620 }
2621
2622 static ir_node *create_lazy_op(const binary_expression_t *expression)
2623 {
2624         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2625         type_t   *type = skip_typeref(expression->base.type);
2626         ir_mode  *mode = get_ir_mode_arithmetic(type);
2627
2628         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2629                 bool val = fold_constant_to_bool(expression->left);
2630                 expression_kind_t ekind = expression->base.kind;
2631                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2632                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2633                         if (!val) {
2634                                 return new_Const(get_mode_null(mode));
2635                         }
2636                 } else {
2637                         if (val) {
2638                                 return new_Const(get_mode_one(mode));
2639                         }
2640                 }
2641
2642                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2643                         bool valr = fold_constant_to_bool(expression->right);
2644                         return create_Const_from_bool(mode, valr);
2645                 }
2646
2647                 return produce_condition_result(expression->right, mode, dbgi);
2648         }
2649
2650         return produce_condition_result((const expression_t*) expression, mode,
2651                                         dbgi);
2652 }
2653
2654 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2655                                             ir_node *right, ir_mode *mode);
2656
2657 static ir_node *create_assign_binop(const binary_expression_t *expression)
2658 {
2659         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2660         const expression_t *left_expr = expression->left;
2661         type_t             *type      = skip_typeref(left_expr->base.type);
2662         ir_node            *right     = expression_to_firm(expression->right);
2663         ir_node            *left_addr = expression_to_addr(left_expr);
2664         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2665         ir_node            *result    = create_op(dbgi, expression, left, right);
2666
2667         result = create_cast(dbgi, result, expression->right->base.type, type);
2668         result = do_strict_conv(dbgi, result);
2669
2670         result = set_value_for_expression_addr(left_expr, result, left_addr);
2671
2672         if (!is_type_compound(type)) {
2673                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2674                 result = create_conv(dbgi, result, mode_arithmetic);
2675         }
2676         return result;
2677 }
2678
2679 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2680 {
2681         expression_kind_t kind = expression->base.kind;
2682
2683         switch(kind) {
2684         case EXPR_BINARY_EQUAL:
2685         case EXPR_BINARY_NOTEQUAL:
2686         case EXPR_BINARY_LESS:
2687         case EXPR_BINARY_LESSEQUAL:
2688         case EXPR_BINARY_GREATER:
2689         case EXPR_BINARY_GREATEREQUAL:
2690         case EXPR_BINARY_ISGREATER:
2691         case EXPR_BINARY_ISGREATEREQUAL:
2692         case EXPR_BINARY_ISLESS:
2693         case EXPR_BINARY_ISLESSEQUAL:
2694         case EXPR_BINARY_ISLESSGREATER:
2695         case EXPR_BINARY_ISUNORDERED: {
2696                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2697                 ir_node    *left     = expression_to_firm(expression->left);
2698                 ir_node    *right    = expression_to_firm(expression->right);
2699                 ir_relation relation = get_relation(kind);
2700                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2701                 return cmp;
2702         }
2703         case EXPR_BINARY_ASSIGN: {
2704                 ir_node *addr  = expression_to_addr(expression->left);
2705                 ir_node *right = expression_to_firm(expression->right);
2706                 ir_node *res
2707                         = set_value_for_expression_addr(expression->left, right, addr);
2708
2709                 type_t  *type            = skip_typeref(expression->base.type);
2710                 if (!is_type_compound(type)) {
2711                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2712                         res                      = create_conv(NULL, res, mode_arithmetic);
2713                 }
2714                 return res;
2715         }
2716         case EXPR_BINARY_ADD:
2717         case EXPR_BINARY_SUB:
2718         case EXPR_BINARY_MUL:
2719         case EXPR_BINARY_DIV:
2720         case EXPR_BINARY_MOD:
2721         case EXPR_BINARY_BITWISE_AND:
2722         case EXPR_BINARY_BITWISE_OR:
2723         case EXPR_BINARY_BITWISE_XOR:
2724         case EXPR_BINARY_SHIFTLEFT:
2725         case EXPR_BINARY_SHIFTRIGHT:
2726         {
2727                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2728                 ir_node  *left  = expression_to_firm(expression->left);
2729                 ir_node  *right = expression_to_firm(expression->right);
2730                 return create_op(dbgi, expression, left, right);
2731         }
2732         case EXPR_BINARY_LOGICAL_AND:
2733         case EXPR_BINARY_LOGICAL_OR:
2734                 return create_lazy_op(expression);
2735         case EXPR_BINARY_COMMA:
2736                 /* create side effects of left side */
2737                 (void) expression_to_firm(expression->left);
2738                 return _expression_to_firm(expression->right);
2739
2740         case EXPR_BINARY_ADD_ASSIGN:
2741         case EXPR_BINARY_SUB_ASSIGN:
2742         case EXPR_BINARY_MUL_ASSIGN:
2743         case EXPR_BINARY_MOD_ASSIGN:
2744         case EXPR_BINARY_DIV_ASSIGN:
2745         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2746         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2747         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2748         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2749         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2750                 return create_assign_binop(expression);
2751         default:
2752                 panic("TODO binexpr type");
2753         }
2754 }
2755
2756 static ir_node *array_access_addr(const array_access_expression_t *expression)
2757 {
2758         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2759         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2760         ir_node  *offset      = expression_to_firm(expression->index);
2761         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2762         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2763         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2764
2765         return result;
2766 }
2767
2768 static ir_node *array_access_to_firm(
2769                 const array_access_expression_t *expression)
2770 {
2771         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2772         ir_node  *addr   = array_access_addr(expression);
2773         type_t   *type   = revert_automatic_type_conversion(
2774                         (const expression_t*) expression);
2775         type             = skip_typeref(type);
2776
2777         return deref_address(dbgi, type, addr);
2778 }
2779
2780 static long get_offsetof_offset(const offsetof_expression_t *expression)
2781 {
2782         type_t *orig_type = expression->type;
2783         long    offset    = 0;
2784
2785         designator_t *designator = expression->designator;
2786         for ( ; designator != NULL; designator = designator->next) {
2787                 type_t *type = skip_typeref(orig_type);
2788                 /* be sure the type is constructed */
2789                 (void) get_ir_type(type);
2790
2791                 if (designator->symbol != NULL) {
2792                         assert(is_type_compound(type));
2793                         symbol_t *symbol = designator->symbol;
2794
2795                         compound_t *compound = type->compound.compound;
2796                         entity_t   *iter     = compound->members.entities;
2797                         for ( ; iter != NULL; iter = iter->base.next) {
2798                                 if (iter->base.symbol == symbol) {
2799                                         break;
2800                                 }
2801                         }
2802                         assert(iter != NULL);
2803
2804                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2805                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2806                         offset += get_entity_offset(iter->compound_member.entity);
2807
2808                         orig_type = iter->declaration.type;
2809                 } else {
2810                         expression_t *array_index = designator->array_index;
2811                         assert(designator->array_index != NULL);
2812                         assert(is_type_array(type));
2813
2814                         long index         = fold_constant_to_int(array_index);
2815                         ir_type *arr_type  = get_ir_type(type);
2816                         ir_type *elem_type = get_array_element_type(arr_type);
2817                         long     elem_size = get_type_size_bytes(elem_type);
2818
2819                         offset += index * elem_size;
2820
2821                         orig_type = type->array.element_type;
2822                 }
2823         }
2824
2825         return offset;
2826 }
2827
2828 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2829 {
2830         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2831         long       offset = get_offsetof_offset(expression);
2832         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2833         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2834
2835         return new_d_Const(dbgi, tv);
2836 }
2837
2838 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2839                                      ir_entity *entity, type_t *type);
2840 static ir_initializer_t *create_ir_initializer(
2841                 const initializer_t *initializer, type_t *type);
2842
2843 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2844                                             initializer_t *initializer,
2845                                             type_t *type)
2846 {
2847         /* create the ir_initializer */
2848         ir_graph *const old_current_ir_graph = current_ir_graph;
2849         current_ir_graph = get_const_code_irg();
2850
2851         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2852
2853         assert(current_ir_graph == get_const_code_irg());
2854         current_ir_graph = old_current_ir_graph;
2855
2856         ident     *const id          = id_unique("initializer.%u");
2857         ir_type   *const irtype      = get_ir_type(type);
2858         ir_type   *const global_type = get_glob_type();
2859         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2860         set_entity_ld_ident(entity, id);
2861         set_entity_visibility(entity, ir_visibility_private);
2862         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2863         set_entity_initializer(entity, irinitializer);
2864         return entity;
2865 }
2866
2867 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2868 {
2869         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2870         type_t        *type        = expression->type;
2871         initializer_t *initializer = expression->initializer;
2872
2873         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2874                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2875                 return create_symconst(dbgi, entity);
2876         } else {
2877                 /* create an entity on the stack */
2878                 ident   *const id     = id_unique("CompLit.%u");
2879                 ir_type *const irtype = get_ir_type(type);
2880                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2881
2882                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2883                 set_entity_ld_ident(entity, id);
2884
2885                 /* create initialisation code */
2886                 create_local_initializer(initializer, dbgi, entity, type);
2887
2888                 /* create a sel for the compound literal address */
2889                 ir_node *frame = get_irg_frame(current_ir_graph);
2890                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2891                 return sel;
2892         }
2893 }
2894
2895 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2896 {
2897         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2898         type_t   *const type = expr->type;
2899         ir_node  *const addr = compound_literal_addr(expr);
2900         return deref_address(dbgi, type, addr);
2901 }
2902
2903 /**
2904  * Transform a sizeof expression into Firm code.
2905  */
2906 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2907 {
2908         type_t *const type = skip_typeref(expression->type);
2909         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2910         if (is_type_array(type) && type->array.is_vla
2911                         && expression->tp_expression != NULL) {
2912                 expression_to_firm(expression->tp_expression);
2913         }
2914
2915         return get_type_size_node(type);
2916 }
2917
2918 static entity_t *get_expression_entity(const expression_t *expression)
2919 {
2920         if (expression->kind != EXPR_REFERENCE)
2921                 return NULL;
2922
2923         return expression->reference.entity;
2924 }
2925
2926 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2927 {
2928         switch(entity->kind) {
2929         case DECLARATION_KIND_CASES:
2930                 return entity->declaration.alignment;
2931         case ENTITY_STRUCT:
2932         case ENTITY_UNION:
2933                 return entity->compound.alignment;
2934         case ENTITY_TYPEDEF:
2935                 return entity->typedefe.alignment;
2936         default:
2937                 break;
2938         }
2939         return 0;
2940 }
2941
2942 /**
2943  * Transform an alignof expression into Firm code.
2944  */
2945 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2946 {
2947         unsigned alignment = 0;
2948
2949         const expression_t *tp_expression = expression->tp_expression;
2950         if (tp_expression != NULL) {
2951                 entity_t *entity = get_expression_entity(tp_expression);
2952                 if (entity != NULL) {
2953                         alignment = get_cparser_entity_alignment(entity);
2954                 }
2955         }
2956
2957         if (alignment == 0) {
2958                 type_t *type = expression->type;
2959                 alignment = get_type_alignment(type);
2960         }
2961
2962         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2963         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2964         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2965         return new_d_Const(dbgi, tv);
2966 }
2967
2968 static void init_ir_types(void);
2969
2970 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2971 {
2972         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2973
2974         bool constant_folding_old = constant_folding;
2975         constant_folding = true;
2976         int old_optimize         = get_optimize();
2977         int old_constant_folding = get_opt_constant_folding();
2978         set_optimize(1);
2979         set_opt_constant_folding(1);
2980
2981         init_ir_types();
2982
2983         ir_graph *old_current_ir_graph = current_ir_graph;
2984         current_ir_graph = get_const_code_irg();
2985
2986         ir_node *const cnst = _expression_to_firm(expression);
2987
2988         current_ir_graph = old_current_ir_graph;
2989         set_optimize(old_optimize);
2990         set_opt_constant_folding(old_constant_folding);
2991
2992         if (!is_Const(cnst)) {
2993                 panic("couldn't fold constant");
2994         }
2995
2996         constant_folding = constant_folding_old;
2997
2998         ir_tarval *const tv   = get_Const_tarval(cnst);
2999         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
3000         return tarval_convert_to(tv, mode);
3001 }
3002
3003 /* this function is only used in parser.c, but it relies on libfirm functionality */
3004 bool constant_is_negative(const expression_t *expression)
3005 {
3006         ir_tarval *tv = fold_constant_to_tarval(expression);
3007         return tarval_is_negative(tv);
3008 }
3009
3010 long fold_constant_to_int(const expression_t *expression)
3011 {
3012         ir_tarval *tv = fold_constant_to_tarval(expression);
3013         if (!tarval_is_long(tv)) {
3014                 panic("result of constant folding is not integer");
3015         }
3016
3017         return get_tarval_long(tv);
3018 }
3019
3020 bool fold_constant_to_bool(const expression_t *expression)
3021 {
3022         ir_tarval *tv = fold_constant_to_tarval(expression);
3023         return !tarval_is_null(tv);
3024 }
3025
3026 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3027 {
3028         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3029
3030         /* first try to fold a constant condition */
3031         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3032                 bool val = fold_constant_to_bool(expression->condition);
3033                 if (val) {
3034                         expression_t *true_expression = expression->true_expression;
3035                         if (true_expression == NULL)
3036                                 true_expression = expression->condition;
3037                         return expression_to_firm(true_expression);
3038                 } else {
3039                         return expression_to_firm(expression->false_expression);
3040                 }
3041         }
3042
3043         ir_node *const true_block  = new_immBlock();
3044         ir_node *const false_block = new_immBlock();
3045         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3046         mature_immBlock(true_block);
3047         mature_immBlock(false_block);
3048
3049         set_cur_block(true_block);
3050         ir_node *true_val;
3051         if (expression->true_expression != NULL) {
3052                 true_val = expression_to_firm(expression->true_expression);
3053         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3054                 true_val = cond_expr;
3055         } else {
3056                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3057                  * comparison.  Generate a "1" as value for the true branch. */
3058                 true_val = new_Const(get_mode_one(mode_Is));
3059         }
3060         ir_node *const true_jmp = new_d_Jmp(dbgi);
3061
3062         set_cur_block(false_block);
3063         ir_node *const false_val = expression_to_firm(expression->false_expression);
3064         ir_node *const false_jmp = new_d_Jmp(dbgi);
3065
3066         /* create the common block */
3067         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3068         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3069         set_cur_block(block);
3070
3071         /* TODO improve static semantics, so either both or no values are NULL */
3072         if (true_val == NULL || false_val == NULL)
3073                 return NULL;
3074
3075         ir_node *const in[2] = { true_val, false_val };
3076         type_t  *const type  = skip_typeref(expression->base.type);
3077         ir_mode *const mode  = get_ir_mode_arithmetic(type);
3078         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3079
3080         return val;
3081 }
3082
3083 /**
3084  * Returns an IR-node representing the address of a field.
3085  */
3086 static ir_node *select_addr(const select_expression_t *expression)
3087 {
3088         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3089
3090         construct_select_compound(expression);
3091
3092         ir_node *compound_addr = expression_to_firm(expression->compound);
3093
3094         entity_t *entry = expression->compound_entry;
3095         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3096         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3097
3098         if (constant_folding) {
3099                 ir_mode *mode      = get_irn_mode(compound_addr);
3100                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3101                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
3102                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3103         } else {
3104                 ir_entity *irentity = entry->compound_member.entity;
3105                 assert(irentity != NULL);
3106                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3107         }
3108 }
3109
3110 static ir_node *select_to_firm(const select_expression_t *expression)
3111 {
3112         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3113         ir_node  *addr = select_addr(expression);
3114         type_t   *type = revert_automatic_type_conversion(
3115                         (const expression_t*) expression);
3116         type           = skip_typeref(type);
3117
3118         entity_t *entry = expression->compound_entry;
3119         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3120
3121         if (entry->compound_member.bitfield) {
3122                 return bitfield_extract_to_firm(expression, addr);
3123         }
3124
3125         return deref_address(dbgi, type, addr);
3126 }
3127
3128 /* Values returned by __builtin_classify_type. */
3129 typedef enum gcc_type_class
3130 {
3131         no_type_class = -1,
3132         void_type_class,
3133         integer_type_class,
3134         char_type_class,
3135         enumeral_type_class,
3136         boolean_type_class,
3137         pointer_type_class,
3138         reference_type_class,
3139         offset_type_class,
3140         real_type_class,
3141         complex_type_class,
3142         function_type_class,
3143         method_type_class,
3144         record_type_class,
3145         union_type_class,
3146         array_type_class,
3147         string_type_class,
3148         set_type_class,
3149         file_type_class,
3150         lang_type_class
3151 } gcc_type_class;
3152
3153 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3154 {
3155         type_t *type = expr->type_expression->base.type;
3156
3157         /* FIXME gcc returns different values depending on whether compiling C or C++
3158          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3159         gcc_type_class tc;
3160         for (;;) {
3161                 type = skip_typeref(type);
3162                 switch (type->kind) {
3163                         case TYPE_ATOMIC: {
3164                                 const atomic_type_t *const atomic_type = &type->atomic;
3165                                 switch (atomic_type->akind) {
3166                                         /* should not be reached */
3167                                         case ATOMIC_TYPE_INVALID:
3168                                                 tc = no_type_class;
3169                                                 goto make_const;
3170
3171                                         /* gcc cannot do that */
3172                                         case ATOMIC_TYPE_VOID:
3173                                                 tc = void_type_class;
3174                                                 goto make_const;
3175
3176                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3177                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3178                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3179                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3180                                         case ATOMIC_TYPE_SHORT:
3181                                         case ATOMIC_TYPE_USHORT:
3182                                         case ATOMIC_TYPE_INT:
3183                                         case ATOMIC_TYPE_UINT:
3184                                         case ATOMIC_TYPE_LONG:
3185                                         case ATOMIC_TYPE_ULONG:
3186                                         case ATOMIC_TYPE_LONGLONG:
3187                                         case ATOMIC_TYPE_ULONGLONG:
3188                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3189                                                 tc = integer_type_class;
3190                                                 goto make_const;
3191
3192                                         case ATOMIC_TYPE_FLOAT:
3193                                         case ATOMIC_TYPE_DOUBLE:
3194                                         case ATOMIC_TYPE_LONG_DOUBLE:
3195                                                 tc = real_type_class;
3196                                                 goto make_const;
3197                                 }
3198                                 panic("Unexpected atomic type in classify_type_to_firm().");
3199                         }
3200
3201                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3202                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3203                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3204                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3205                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3206                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3207                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3208
3209                         /* gcc handles this as integer */
3210                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3211
3212                         /* gcc classifies the referenced type */
3213                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3214
3215                         /* typedef/typeof should be skipped already */
3216                         case TYPE_TYPEDEF:
3217                         case TYPE_TYPEOF:
3218                         case TYPE_ERROR:
3219                                 break;
3220                 }
3221                 panic("unexpected TYPE classify_type_to_firm().");
3222         }
3223
3224 make_const:;
3225         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3226         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3227         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3228         return new_d_Const(dbgi, tv);
3229 }
3230
3231 static ir_node *function_name_to_firm(
3232                 const funcname_expression_t *const expr)
3233 {
3234         switch(expr->kind) {
3235         case FUNCNAME_FUNCTION:
3236         case FUNCNAME_PRETTY_FUNCTION:
3237         case FUNCNAME_FUNCDNAME:
3238                 if (current_function_name == NULL) {
3239                         const source_position_t *const src_pos = &expr->base.source_position;
3240                         const char    *name  = current_function_entity->base.symbol->string;
3241                         const string_t string = { name, strlen(name) + 1 };
3242                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3243                 }
3244                 return current_function_name;
3245         case FUNCNAME_FUNCSIG:
3246                 if (current_funcsig == NULL) {
3247                         const source_position_t *const src_pos = &expr->base.source_position;
3248                         ir_entity *ent = get_irg_entity(current_ir_graph);
3249                         const char *const name = get_entity_ld_name(ent);
3250                         const string_t string = { name, strlen(name) + 1 };
3251                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3252                 }
3253                 return current_funcsig;
3254         }
3255         panic("Unsupported function name");
3256 }
3257
3258 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3259 {
3260         statement_t *statement = expr->statement;
3261
3262         assert(statement->kind == STATEMENT_COMPOUND);
3263         return compound_statement_to_firm(&statement->compound);
3264 }
3265
3266 static ir_node *va_start_expression_to_firm(
3267         const va_start_expression_t *const expr)
3268 {
3269         ir_entity *param_ent = current_vararg_entity;
3270         if (param_ent == NULL) {
3271                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3272                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3273                 ir_type *const param_type  = get_unknown_type();
3274                 param_ent = new_parameter_entity(frame_type, n, param_type);
3275                 current_vararg_entity = param_ent;
3276         }
3277
3278         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3279         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3280         ir_node  *const no_mem  = new_NoMem();
3281         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3282
3283         set_value_for_expression(expr->ap, arg_sel);
3284
3285         return NULL;
3286 }
3287
3288 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3289 {
3290         type_t       *const type    = expr->base.type;
3291         expression_t *const ap_expr = expr->ap;
3292         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3293         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3294         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3295         ir_node      *const res     = deref_address(dbgi, type, ap);
3296
3297         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3298         ir_mode      *const mode    = get_irn_mode(cnst);
3299         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3300         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3301         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3302         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3303         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3304
3305         set_value_for_expression_addr(ap_expr, add, ap_addr);
3306
3307         return res;
3308 }
3309
3310 /**
3311  * Generate Firm for a va_copy expression.
3312  */
3313 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3314 {
3315         ir_node *const src = expression_to_firm(expr->src);
3316         set_value_for_expression(expr->dst, src);
3317         return NULL;
3318 }
3319
3320 static ir_node *dereference_addr(const unary_expression_t *const expression)
3321 {
3322         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3323         return expression_to_firm(expression->value);
3324 }
3325
3326 /**
3327  * Returns a IR-node representing an lvalue of the given expression.
3328  */
3329 static ir_node *expression_to_addr(const expression_t *expression)
3330 {
3331         switch(expression->kind) {
3332         case EXPR_ARRAY_ACCESS:
3333                 return array_access_addr(&expression->array_access);
3334         case EXPR_CALL:
3335                 return call_expression_to_firm(&expression->call);
3336         case EXPR_COMPOUND_LITERAL:
3337                 return compound_literal_addr(&expression->compound_literal);
3338         case EXPR_REFERENCE:
3339                 return reference_addr(&expression->reference);
3340         case EXPR_SELECT:
3341                 return select_addr(&expression->select);
3342         case EXPR_UNARY_DEREFERENCE:
3343                 return dereference_addr(&expression->unary);
3344         default:
3345                 break;
3346         }
3347         panic("trying to get address of non-lvalue");
3348 }
3349
3350 static ir_node *builtin_constant_to_firm(
3351                 const builtin_constant_expression_t *expression)
3352 {
3353         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3354         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3355         return create_Const_from_bool(mode, v);
3356 }
3357
3358 static ir_node *builtin_types_compatible_to_firm(
3359                 const builtin_types_compatible_expression_t *expression)
3360 {
3361         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3362         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3363         bool     const value = types_compatible(left, right);
3364         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3365         return create_Const_from_bool(mode, value);
3366 }
3367
3368 static ir_node *get_label_block(label_t *label)
3369 {
3370         if (label->block != NULL)
3371                 return label->block;
3372
3373         /* beware: might be called from create initializer with current_ir_graph
3374          * set to const_code_irg. */
3375         ir_graph *rem    = current_ir_graph;
3376         current_ir_graph = current_function;
3377
3378         ir_node *block = new_immBlock();
3379
3380         label->block = block;
3381
3382         ARR_APP1(label_t *, all_labels, label);
3383
3384         current_ir_graph = rem;
3385         return block;
3386 }
3387
3388 /**
3389  * Pointer to a label.  This is used for the
3390  * GNU address-of-label extension.
3391  */
3392 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3393 {
3394         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3395         ir_node   *block  = get_label_block(label->label);
3396         ir_entity *entity = create_Block_entity(block);
3397
3398         symconst_symbol value;
3399         value.entity_p = entity;
3400         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3401 }
3402
3403 /**
3404  * creates firm nodes for an expression. The difference between this function
3405  * and expression_to_firm is, that this version might produce mode_b nodes
3406  * instead of mode_Is.
3407  */
3408 static ir_node *_expression_to_firm(expression_t const *const expr)
3409 {
3410 #ifndef NDEBUG
3411         if (!constant_folding) {
3412                 assert(!expr->base.transformed);
3413                 ((expression_t*)expr)->base.transformed = true;
3414         }
3415 #endif
3416
3417         switch (expr->kind) {
3418         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3419         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3420         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3421         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3422         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3423         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3424         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3425         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3426         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3427         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3428         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3429         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3430         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3431         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3432         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3433         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3434         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3435         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3436         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3437         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3438         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3439         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3440         case EXPR_WIDE_STRING_LITERAL:        return wide_string_literal_to_firm(     &expr->string_literal);
3441
3442         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->literal.value);
3443
3444         case EXPR_ERROR: break;
3445         }
3446         panic("invalid expression found");
3447 }
3448
3449 /**
3450  * Check if a given expression is a GNU __builtin_expect() call.
3451  */
3452 static bool is_builtin_expect(const expression_t *expression)
3453 {
3454         if (expression->kind != EXPR_CALL)
3455                 return false;
3456
3457         expression_t *function = expression->call.function;
3458         if (function->kind != EXPR_REFERENCE)
3459                 return false;
3460         reference_expression_t *ref = &function->reference;
3461         if (ref->entity->kind         != ENTITY_FUNCTION ||
3462             ref->entity->function.btk != BUILTIN_EXPECT)
3463                 return false;
3464
3465         return true;
3466 }
3467
3468 static bool produces_mode_b(const expression_t *expression)
3469 {
3470         switch (expression->kind) {
3471         case EXPR_BINARY_EQUAL:
3472         case EXPR_BINARY_NOTEQUAL:
3473         case EXPR_BINARY_LESS:
3474         case EXPR_BINARY_LESSEQUAL:
3475         case EXPR_BINARY_GREATER:
3476         case EXPR_BINARY_GREATEREQUAL:
3477         case EXPR_BINARY_ISGREATER:
3478         case EXPR_BINARY_ISGREATEREQUAL:
3479         case EXPR_BINARY_ISLESS:
3480         case EXPR_BINARY_ISLESSEQUAL:
3481         case EXPR_BINARY_ISLESSGREATER:
3482         case EXPR_BINARY_ISUNORDERED:
3483         case EXPR_UNARY_NOT:
3484                 return true;
3485
3486         case EXPR_CALL:
3487                 if (is_builtin_expect(expression)) {
3488                         expression_t *argument = expression->call.arguments->expression;
3489                         return produces_mode_b(argument);
3490                 }
3491                 return false;
3492         case EXPR_BINARY_COMMA:
3493                 return produces_mode_b(expression->binary.right);
3494
3495         default:
3496                 return false;
3497         }
3498 }
3499
3500 static ir_node *expression_to_firm(const expression_t *expression)
3501 {
3502         if (!produces_mode_b(expression)) {
3503                 ir_node *res = _expression_to_firm(expression);
3504                 assert(res == NULL || get_irn_mode(res) != mode_b);
3505                 return res;
3506         }
3507
3508         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3509                 return new_Const(fold_constant_to_tarval(expression));
3510         }
3511
3512         /* we have to produce a 0/1 from the mode_b expression */
3513         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3514         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3515         return produce_condition_result(expression, mode, dbgi);
3516 }
3517
3518 /**
3519  * create a short-circuit expression evaluation that tries to construct
3520  * efficient control flow structures for &&, || and ! expressions
3521  */
3522 static ir_node *create_condition_evaluation(const expression_t *expression,
3523                                             ir_node *true_block,
3524                                             ir_node *false_block)
3525 {
3526         switch(expression->kind) {
3527         case EXPR_UNARY_NOT: {
3528                 const unary_expression_t *unary_expression = &expression->unary;
3529                 create_condition_evaluation(unary_expression->value, false_block,
3530                                             true_block);
3531                 return NULL;
3532         }
3533         case EXPR_BINARY_LOGICAL_AND: {
3534                 const binary_expression_t *binary_expression = &expression->binary;
3535
3536                 ir_node *extra_block = new_immBlock();
3537                 create_condition_evaluation(binary_expression->left, extra_block,
3538                                             false_block);
3539                 mature_immBlock(extra_block);
3540                 set_cur_block(extra_block);
3541                 create_condition_evaluation(binary_expression->right, true_block,
3542                                             false_block);
3543                 return NULL;
3544         }
3545         case EXPR_BINARY_LOGICAL_OR: {
3546                 const binary_expression_t *binary_expression = &expression->binary;
3547
3548                 ir_node *extra_block = new_immBlock();
3549                 create_condition_evaluation(binary_expression->left, true_block,
3550                                             extra_block);
3551                 mature_immBlock(extra_block);
3552                 set_cur_block(extra_block);
3553                 create_condition_evaluation(binary_expression->right, true_block,
3554                                             false_block);
3555                 return NULL;
3556         }
3557         default:
3558                 break;
3559         }
3560
3561         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3562         ir_node  *cond_expr  = _expression_to_firm(expression);
3563         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3564         ir_node  *cond       = new_d_Cond(dbgi, condition);
3565         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3566         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3567
3568         /* set branch prediction info based on __builtin_expect */
3569         if (is_builtin_expect(expression) && is_Cond(cond)) {
3570                 call_argument_t *argument = expression->call.arguments->next;
3571                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3572                         bool               const cnst = fold_constant_to_bool(argument->expression);
3573                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3574                         set_Cond_jmp_pred(cond, pred);
3575                 }
3576         }
3577
3578         add_immBlock_pred(true_block, true_proj);
3579         add_immBlock_pred(false_block, false_proj);
3580
3581         set_unreachable_now();
3582         return cond_expr;
3583 }
3584
3585 static void create_variable_entity(entity_t *variable,
3586                                    declaration_kind_t declaration_kind,
3587                                    ir_type *parent_type)
3588 {
3589         assert(variable->kind == ENTITY_VARIABLE);
3590         type_t    *type = skip_typeref(variable->declaration.type);
3591
3592         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3593         ir_type   *const irtype    = get_ir_type(type);
3594         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3595         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3596         unsigned         alignment = variable->declaration.alignment;
3597
3598         set_entity_alignment(irentity, alignment);
3599
3600         handle_decl_modifiers(irentity, variable);
3601
3602         variable->declaration.kind  = (unsigned char) declaration_kind;
3603         variable->variable.v.entity = irentity;
3604         set_entity_ld_ident(irentity, create_ld_ident(variable));
3605
3606         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3607                 set_entity_volatility(irentity, volatility_is_volatile);
3608         }
3609 }
3610
3611
3612 typedef struct type_path_entry_t type_path_entry_t;
3613 struct type_path_entry_t {
3614         type_t           *type;
3615         ir_initializer_t *initializer;
3616         size_t            index;
3617         entity_t         *compound_entry;
3618 };
3619
3620 typedef struct type_path_t type_path_t;
3621 struct type_path_t {
3622         type_path_entry_t *path;
3623         type_t            *top_type;
3624         bool               invalid;
3625 };
3626
3627 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3628 {
3629         size_t len = ARR_LEN(path->path);
3630
3631         for (size_t i = 0; i < len; ++i) {
3632                 const type_path_entry_t *entry = & path->path[i];
3633
3634                 type_t *type = skip_typeref(entry->type);
3635                 if (is_type_compound(type)) {
3636                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3637                 } else if (is_type_array(type)) {
3638                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3639                 } else {
3640                         fprintf(stderr, "-INVALID-");
3641                 }
3642         }
3643         fprintf(stderr, "  (");
3644         print_type(path->top_type);
3645         fprintf(stderr, ")");
3646 }
3647
3648 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3649 {
3650         size_t len = ARR_LEN(path->path);
3651         assert(len > 0);
3652         return & path->path[len-1];
3653 }
3654
3655 static type_path_entry_t *append_to_type_path(type_path_t *path)
3656 {
3657         size_t len = ARR_LEN(path->path);
3658         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3659
3660         type_path_entry_t *result = & path->path[len];
3661         memset(result, 0, sizeof(result[0]));
3662         return result;
3663 }
3664
3665 static size_t get_compound_member_count(const compound_type_t *type)
3666 {
3667         compound_t *compound  = type->compound;
3668         size_t      n_members = 0;
3669         entity_t   *member    = compound->members.entities;
3670         for ( ; member != NULL; member = member->base.next) {
3671                 ++n_members;
3672         }
3673
3674         return n_members;
3675 }
3676
3677 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3678 {
3679         type_t *orig_top_type = path->top_type;
3680         type_t *top_type      = skip_typeref(orig_top_type);
3681
3682         assert(is_type_compound(top_type) || is_type_array(top_type));
3683
3684         if (ARR_LEN(path->path) == 0) {
3685                 return NULL;
3686         } else {
3687                 type_path_entry_t *top         = get_type_path_top(path);
3688                 ir_initializer_t  *initializer = top->initializer;
3689                 return get_initializer_compound_value(initializer, top->index);
3690         }
3691 }
3692
3693 static void descend_into_subtype(type_path_t *path)
3694 {
3695         type_t *orig_top_type = path->top_type;
3696         type_t *top_type      = skip_typeref(orig_top_type);
3697
3698         assert(is_type_compound(top_type) || is_type_array(top_type));
3699
3700         ir_initializer_t *initializer = get_initializer_entry(path);
3701
3702         type_path_entry_t *top = append_to_type_path(path);
3703         top->type              = top_type;
3704
3705         size_t len;
3706
3707         if (is_type_compound(top_type)) {
3708                 compound_t *const compound = top_type->compound.compound;
3709                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3710
3711                 top->compound_entry = entry;
3712                 top->index          = 0;
3713                 len                 = get_compound_member_count(&top_type->compound);
3714                 if (entry != NULL) {
3715                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3716                         path->top_type = entry->declaration.type;
3717                 }
3718         } else {
3719                 assert(is_type_array(top_type));
3720                 assert(top_type->array.size > 0);
3721
3722                 top->index     = 0;
3723                 path->top_type = top_type->array.element_type;
3724                 len            = top_type->array.size;
3725         }
3726         if (initializer == NULL
3727                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3728                 initializer = create_initializer_compound(len);
3729                 /* we have to set the entry at the 2nd latest path entry... */
3730                 size_t path_len = ARR_LEN(path->path);
3731                 assert(path_len >= 1);
3732                 if (path_len > 1) {
3733                         type_path_entry_t *entry        = & path->path[path_len-2];
3734                         ir_initializer_t  *tinitializer = entry->initializer;
3735                         set_initializer_compound_value(tinitializer, entry->index,
3736                                                        initializer);
3737                 }
3738         }
3739         top->initializer = initializer;
3740 }
3741
3742 static void ascend_from_subtype(type_path_t *path)
3743 {
3744         type_path_entry_t *top = get_type_path_top(path);
3745
3746         path->top_type = top->type;
3747
3748         size_t len = ARR_LEN(path->path);
3749         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3750 }
3751
3752 static void walk_designator(type_path_t *path, const designator_t *designator)
3753 {
3754         /* designators start at current object type */
3755         ARR_RESIZE(type_path_entry_t, path->path, 1);
3756
3757         for ( ; designator != NULL; designator = designator->next) {
3758                 type_path_entry_t *top         = get_type_path_top(path);
3759                 type_t            *orig_type   = top->type;
3760                 type_t            *type        = skip_typeref(orig_type);
3761
3762                 if (designator->symbol != NULL) {
3763                         assert(is_type_compound(type));
3764                         size_t    index  = 0;
3765                         symbol_t *symbol = designator->symbol;
3766
3767                         compound_t *compound = type->compound.compound;
3768                         entity_t   *iter     = compound->members.entities;
3769                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3770                                 if (iter->base.symbol == symbol) {
3771                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3772                                         break;
3773                                 }
3774                         }
3775                         assert(iter != NULL);
3776
3777                         /* revert previous initialisations of other union elements */
3778                         if (type->kind == TYPE_COMPOUND_UNION) {
3779                                 ir_initializer_t *initializer = top->initializer;
3780                                 if (initializer != NULL
3781                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3782                                         /* are we writing to a new element? */
3783                                         ir_initializer_t *oldi
3784                                                 = get_initializer_compound_value(initializer, index);
3785                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3786                                                 /* clear initializer */
3787                                                 size_t len
3788                                                         = get_initializer_compound_n_entries(initializer);
3789                                                 ir_initializer_t *nulli = get_initializer_null();
3790                                                 for (size_t i = 0; i < len; ++i) {
3791                                                         set_initializer_compound_value(initializer, i,
3792                                                                                        nulli);
3793                                                 }
3794                                         }
3795                                 }
3796                         }
3797
3798                         top->type           = orig_type;
3799                         top->compound_entry = iter;
3800                         top->index          = index;
3801                         orig_type           = iter->declaration.type;
3802                 } else {
3803                         expression_t *array_index = designator->array_index;
3804                         assert(designator->array_index != NULL);
3805                         assert(is_type_array(type));
3806
3807                         long index = fold_constant_to_int(array_index);
3808                         assert(index >= 0);
3809 #ifndef NDEBUG
3810                         if (type->array.size_constant) {
3811                                 long array_size = type->array.size;
3812                                 assert(index < array_size);
3813                         }
3814 #endif
3815
3816                         top->type  = orig_type;
3817                         top->index = (size_t) index;
3818                         orig_type  = type->array.element_type;
3819                 }
3820                 path->top_type = orig_type;
3821
3822                 if (designator->next != NULL) {
3823                         descend_into_subtype(path);
3824                 }
3825         }
3826
3827         path->invalid  = false;
3828 }
3829
3830 static void advance_current_object(type_path_t *path)
3831 {
3832         if (path->invalid) {
3833                 /* TODO: handle this... */
3834                 panic("invalid initializer in ast2firm (excessive elements)");
3835         }
3836
3837         type_path_entry_t *top = get_type_path_top(path);
3838
3839         type_t *type = skip_typeref(top->type);
3840         if (is_type_union(type)) {
3841                 /* only the first element is initialized in unions */
3842                 top->compound_entry = NULL;
3843         } else if (is_type_struct(type)) {
3844                 entity_t *entry = top->compound_entry;
3845
3846                 top->index++;
3847                 entry               = skip_unnamed_bitfields(entry->base.next);
3848                 top->compound_entry = entry;
3849                 if (entry != NULL) {
3850                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3851                         path->top_type = entry->declaration.type;
3852                         return;
3853                 }
3854         } else {
3855                 assert(is_type_array(type));
3856
3857                 top->index++;
3858                 if (!type->array.size_constant || top->index < type->array.size) {
3859                         return;
3860                 }
3861         }
3862
3863         /* we're past the last member of the current sub-aggregate, try if we
3864          * can ascend in the type hierarchy and continue with another subobject */
3865         size_t len = ARR_LEN(path->path);
3866
3867         if (len > 1) {
3868                 ascend_from_subtype(path);
3869                 advance_current_object(path);
3870         } else {
3871                 path->invalid = true;
3872         }
3873 }
3874
3875
3876 static ir_initializer_t *create_ir_initializer_value(
3877                 const initializer_value_t *initializer)
3878 {
3879         if (is_type_compound(initializer->value->base.type)) {
3880                 panic("initializer creation for compounds not implemented yet");
3881         }
3882         type_t       *type = initializer->value->base.type;
3883         expression_t *expr = initializer->value;
3884         ir_node *value = expression_to_firm(expr);
3885         ir_mode *mode  = get_ir_mode_storage(type);
3886         value          = create_conv(NULL, value, mode);
3887         return create_initializer_const(value);
3888 }
3889
3890 /** test wether type can be initialized by a string constant */
3891 static bool is_string_type(type_t *type)
3892 {
3893         type_t *inner;
3894         if (is_type_pointer(type)) {
3895                 inner = skip_typeref(type->pointer.points_to);
3896         } else if(is_type_array(type)) {
3897                 inner = skip_typeref(type->array.element_type);
3898         } else {
3899                 return false;
3900         }
3901
3902         return is_type_integer(inner);
3903 }
3904
3905 static ir_initializer_t *create_ir_initializer_list(
3906                 const initializer_list_t *initializer, type_t *type)
3907 {
3908         type_path_t path;
3909         memset(&path, 0, sizeof(path));
3910         path.top_type = type;
3911         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3912
3913         descend_into_subtype(&path);
3914
3915         for (size_t i = 0; i < initializer->len; ++i) {
3916                 const initializer_t *sub_initializer = initializer->initializers[i];
3917
3918                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3919                         walk_designator(&path, sub_initializer->designator.designator);
3920                         continue;
3921                 }
3922
3923                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3924                         /* we might have to descend into types until we're at a scalar
3925                          * type */
3926                         while(true) {
3927                                 type_t *orig_top_type = path.top_type;
3928                                 type_t *top_type      = skip_typeref(orig_top_type);
3929
3930                                 if (is_type_scalar(top_type))
3931                                         break;
3932                                 descend_into_subtype(&path);
3933                         }
3934                 } else if (sub_initializer->kind == INITIALIZER_STRING
3935                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3936                         /* we might have to descend into types until we're at a scalar
3937                          * type */
3938                         while (true) {
3939                                 type_t *orig_top_type = path.top_type;
3940                                 type_t *top_type      = skip_typeref(orig_top_type);
3941
3942                                 if (is_string_type(top_type))
3943                                         break;
3944                                 descend_into_subtype(&path);
3945                         }
3946                 }
3947
3948                 ir_initializer_t *sub_irinitializer
3949                         = create_ir_initializer(sub_initializer, path.top_type);
3950
3951                 size_t path_len = ARR_LEN(path.path);
3952                 assert(path_len >= 1);
3953                 type_path_entry_t *entry        = & path.path[path_len-1];
3954                 ir_initializer_t  *tinitializer = entry->initializer;
3955                 set_initializer_compound_value(tinitializer, entry->index,
3956                                                sub_irinitializer);
3957
3958                 advance_current_object(&path);
3959         }
3960
3961         assert(ARR_LEN(path.path) >= 1);
3962         ir_initializer_t *result = path.path[0].initializer;
3963         DEL_ARR_F(path.path);
3964
3965         return result;
3966 }
3967
3968 static ir_initializer_t *create_ir_initializer_string(
3969                 const initializer_string_t *initializer, type_t *type)
3970 {
3971         type = skip_typeref(type);
3972
3973         size_t            string_len    = initializer->string.size;
3974         assert(type->kind == TYPE_ARRAY);
3975         assert(type->array.size_constant);
3976         size_t            len           = type->array.size;
3977         ir_initializer_t *irinitializer = create_initializer_compound(len);
3978
3979         const char *string = initializer->string.begin;
3980         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3981
3982         for (size_t i = 0; i < len; ++i) {
3983                 char c = 0;
3984                 if (i < string_len)
3985                         c = string[i];
3986
3987                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3988                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3989
3990                 set_initializer_compound_value(irinitializer, i, char_initializer);
3991         }
3992
3993         return irinitializer;
3994 }
3995
3996 static ir_initializer_t *create_ir_initializer_wide_string(
3997                 const initializer_wide_string_t *initializer, type_t *type)
3998 {
3999         assert(type->kind == TYPE_ARRAY);
4000         assert(type->array.size_constant);
4001         size_t            len           = type->array.size;
4002         size_t            string_len    = wstrlen(&initializer->string);
4003         ir_initializer_t *irinitializer = create_initializer_compound(len);
4004
4005         const char *p    = initializer->string.begin;
4006         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4007
4008         for (size_t i = 0; i < len; ++i) {
4009                 utf32 c = 0;
4010                 if (i < string_len) {
4011                         c = read_utf8_char(&p);
4012                 }
4013                 ir_tarval *tv = new_tarval_from_long(c, mode);
4014                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4015
4016                 set_initializer_compound_value(irinitializer, i, char_initializer);
4017         }
4018
4019         return irinitializer;
4020 }
4021
4022 static ir_initializer_t *create_ir_initializer(
4023                 const initializer_t *initializer, type_t *type)
4024 {
4025         switch(initializer->kind) {
4026                 case INITIALIZER_STRING:
4027                         return create_ir_initializer_string(&initializer->string, type);
4028
4029                 case INITIALIZER_WIDE_STRING:
4030                         return create_ir_initializer_wide_string(&initializer->wide_string,
4031                                                                  type);
4032
4033                 case INITIALIZER_LIST:
4034                         return create_ir_initializer_list(&initializer->list, type);
4035
4036                 case INITIALIZER_VALUE:
4037                         return create_ir_initializer_value(&initializer->value);
4038
4039                 case INITIALIZER_DESIGNATOR:
4040                         panic("unexpected designator initializer found");
4041         }
4042         panic("unknown initializer");
4043 }
4044
4045 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4046  *  are elements [...] the remainder of the aggregate shall be initialized
4047  *  implicitly the same as objects that have static storage duration. */
4048 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4049                 ir_node *base_addr)
4050 {
4051         /* for unions we must NOT do anything for null initializers */
4052         ir_type *owner = get_entity_owner(entity);
4053         if (is_Union_type(owner)) {
4054                 return;
4055         }
4056
4057         ir_type *ent_type = get_entity_type(entity);
4058         /* create sub-initializers for a compound type */
4059         if (is_compound_type(ent_type)) {
4060                 unsigned n_members = get_compound_n_members(ent_type);
4061                 for (unsigned n = 0; n < n_members; ++n) {
4062                         ir_entity *member = get_compound_member(ent_type, n);
4063                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4064                                                                 member);
4065                         create_dynamic_null_initializer(member, dbgi, addr);
4066                 }
4067                 return;
4068         }
4069         if (is_Array_type(ent_type)) {
4070                 assert(has_array_upper_bound(ent_type, 0));
4071                 long n = get_array_upper_bound_int(ent_type, 0);
4072                 for (long i = 0; i < n; ++i) {
4073                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4074                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4075                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4076                         ir_node   *in[1]    = { cnst };
4077                         ir_entity *arrent   = get_array_element_entity(ent_type);
4078                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4079                                                         arrent);
4080                         create_dynamic_null_initializer(arrent, dbgi, addr);
4081                 }
4082                 return;
4083         }
4084
4085         ir_mode *value_mode = get_type_mode(ent_type);
4086         ir_node *node       = new_Const(get_mode_null(value_mode));
4087
4088         /* is it a bitfield type? */
4089         if (is_Primitive_type(ent_type) &&
4090                         get_primitive_base_type(ent_type) != NULL) {
4091                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4092                 return;
4093         }
4094
4095         ir_node *mem    = get_store();
4096         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4097         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4098         set_store(proj_m);
4099 }
4100
4101 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4102                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4103 {
4104         switch(get_initializer_kind(initializer)) {
4105         case IR_INITIALIZER_NULL:
4106                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4107                 return;
4108         case IR_INITIALIZER_CONST: {
4109                 ir_node *node     = get_initializer_const_value(initializer);
4110                 ir_type *ent_type = get_entity_type(entity);
4111
4112                 /* is it a bitfield type? */
4113                 if (is_Primitive_type(ent_type) &&
4114                                 get_primitive_base_type(ent_type) != NULL) {
4115                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4116                         return;
4117                 }
4118
4119                 assert(get_type_mode(type) == get_irn_mode(node));
4120                 ir_node *mem    = get_store();
4121                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4122                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4123                 set_store(proj_m);
4124                 return;
4125         }
4126         case IR_INITIALIZER_TARVAL: {
4127                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4128                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4129                 ir_type   *ent_type = get_entity_type(entity);
4130
4131                 /* is it a bitfield type? */
4132                 if (is_Primitive_type(ent_type) &&
4133                                 get_primitive_base_type(ent_type) != NULL) {
4134                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4135                         return;
4136                 }
4137
4138                 assert(get_type_mode(type) == get_tarval_mode(tv));
4139                 ir_node *mem    = get_store();
4140                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4141                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4142                 set_store(proj_m);
4143                 return;
4144         }
4145         case IR_INITIALIZER_COMPOUND: {
4146                 assert(is_compound_type(type) || is_Array_type(type));
4147                 int n_members;
4148                 if (is_Array_type(type)) {
4149                         assert(has_array_upper_bound(type, 0));
4150                         n_members = get_array_upper_bound_int(type, 0);
4151                 } else {
4152                         n_members = get_compound_n_members(type);
4153                 }
4154
4155                 if (get_initializer_compound_n_entries(initializer)
4156                                 != (unsigned) n_members)
4157                         panic("initializer doesn't match compound type");
4158
4159                 for (int i = 0; i < n_members; ++i) {
4160                         ir_node   *addr;
4161                         ir_type   *irtype;
4162                         ir_entity *sub_entity;
4163                         if (is_Array_type(type)) {
4164                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4165                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4166                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4167                                 ir_node   *in[1]    = { cnst };
4168                                 irtype     = get_array_element_type(type);
4169                                 sub_entity = get_array_element_entity(type);
4170                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4171                                                        sub_entity);
4172                         } else {
4173                                 sub_entity = get_compound_member(type, i);
4174                                 irtype     = get_entity_type(sub_entity);
4175                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4176                                                              sub_entity);
4177                         }
4178
4179                         ir_initializer_t *sub_init
4180                                 = get_initializer_compound_value(initializer, i);
4181
4182                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4183                                                        addr);
4184                 }
4185                 return;
4186         }
4187         }
4188
4189         panic("invalid IR_INITIALIZER found");
4190 }
4191
4192 static void create_dynamic_initializer(ir_initializer_t *initializer,
4193                 dbg_info *dbgi, ir_entity *entity)
4194 {
4195         ir_node *frame     = get_irg_frame(current_ir_graph);
4196         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4197         ir_type *type      = get_entity_type(entity);
4198
4199         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4200 }
4201
4202 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4203                                      ir_entity *entity, type_t *type)
4204 {
4205         ir_node *memory = get_store();
4206         ir_node *nomem  = new_NoMem();
4207         ir_node *frame  = get_irg_frame(current_ir_graph);
4208         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4209
4210         if (initializer->kind == INITIALIZER_VALUE) {
4211                 initializer_value_t *initializer_value = &initializer->value;
4212
4213                 ir_node *value = expression_to_firm(initializer_value->value);
4214                 type = skip_typeref(type);
4215                 assign_value(dbgi, addr, type, value);
4216                 return;
4217         }
4218
4219         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4220                 ir_initializer_t *irinitializer
4221                         = create_ir_initializer(initializer, type);
4222
4223                 create_dynamic_initializer(irinitializer, dbgi, entity);
4224                 return;
4225         }
4226
4227         /* create a "template" entity which is copied to the entity on the stack */
4228         ir_entity *const init_entity
4229                 = create_initializer_entity(dbgi, initializer, type);
4230         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4231         ir_type *const irtype   = get_ir_type(type);
4232         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4233
4234         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4235         set_store(copyb_mem);
4236 }
4237
4238 static void create_initializer_local_variable_entity(entity_t *entity)
4239 {
4240         assert(entity->kind == ENTITY_VARIABLE);
4241         initializer_t *initializer = entity->variable.initializer;
4242         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4243         ir_entity     *irentity    = entity->variable.v.entity;
4244         type_t        *type        = entity->declaration.type;
4245
4246         create_local_initializer(initializer, dbgi, irentity, type);
4247 }
4248
4249 static void create_variable_initializer(entity_t *entity)
4250 {
4251         assert(entity->kind == ENTITY_VARIABLE);
4252         initializer_t *initializer = entity->variable.initializer;
4253         if (initializer == NULL)
4254                 return;
4255
4256         declaration_kind_t declaration_kind
4257                 = (declaration_kind_t) entity->declaration.kind;
4258         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4259                 create_initializer_local_variable_entity(entity);
4260                 return;
4261         }
4262
4263         type_t            *type = entity->declaration.type;
4264         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4265
4266         if (initializer->kind == INITIALIZER_VALUE) {
4267                 expression_t *      value     = initializer->value.value;
4268                 type_t       *const init_type = skip_typeref(value->base.type);
4269
4270                 if (!is_type_scalar(init_type)) {
4271                         /* skip convs */
4272                         while (value->kind == EXPR_UNARY_CAST)
4273                                 value = value->unary.value;
4274
4275                         if (value->kind != EXPR_COMPOUND_LITERAL)
4276                                 panic("expected non-scalar initializer to be a compound literal");
4277                         initializer = value->compound_literal.initializer;
4278                         goto have_initializer;
4279                 }
4280
4281                 ir_node  *      node = expression_to_firm(value);
4282                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4283                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4284                 node = create_conv(dbgi, node, mode);
4285                 node = do_strict_conv(dbgi, node);
4286
4287                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4288                         set_value(entity->variable.v.value_number, node);
4289                 } else {
4290                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4291
4292                         ir_entity *irentity = entity->variable.v.entity;
4293
4294                         if (tq & TYPE_QUALIFIER_CONST
4295                                         && get_entity_owner(irentity) != get_tls_type()) {
4296                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4297                         }
4298                         set_atomic_ent_value(irentity, node);
4299                 }
4300         } else {
4301 have_initializer:
4302                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4303                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4304
4305                 ir_entity        *irentity        = entity->variable.v.entity;
4306                 ir_initializer_t *irinitializer
4307                         = create_ir_initializer(initializer, type);
4308
4309                 if (tq & TYPE_QUALIFIER_CONST) {
4310                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4311                 }
4312                 set_entity_initializer(irentity, irinitializer);
4313         }
4314 }
4315
4316 static void create_variable_length_array(entity_t *entity)
4317 {
4318         assert(entity->kind == ENTITY_VARIABLE);
4319         assert(entity->variable.initializer == NULL);
4320
4321         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4322         entity->variable.v.vla_base = NULL;
4323
4324         /* TODO: record VLA somewhere so we create the free node when we leave
4325          * it's scope */
4326 }
4327
4328 static void allocate_variable_length_array(entity_t *entity)
4329 {
4330         assert(entity->kind == ENTITY_VARIABLE);
4331         assert(entity->variable.initializer == NULL);
4332         assert(currently_reachable());
4333
4334         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4335         type_t   *type      = entity->declaration.type;
4336         ir_type  *el_type   = get_ir_type(type->array.element_type);
4337
4338         /* make sure size_node is calculated */
4339         get_type_size_node(type);
4340         ir_node  *elems = type->array.size_node;
4341         ir_node  *mem   = get_store();
4342         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4343
4344         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4345         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4346         set_store(proj_m);
4347
4348         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4349         entity->variable.v.vla_base = addr;
4350 }
4351
4352 /**
4353  * Creates a Firm local variable from a declaration.
4354  */
4355 static void create_local_variable(entity_t *entity)
4356 {
4357         assert(entity->kind == ENTITY_VARIABLE);
4358         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4359
4360         bool needs_entity = entity->variable.address_taken;
4361         type_t *type = skip_typeref(entity->declaration.type);
4362
4363         /* is it a variable length array? */
4364         if (is_type_array(type) && !type->array.size_constant) {
4365                 create_variable_length_array(entity);
4366                 return;
4367         } else if (is_type_array(type) || is_type_compound(type)) {
4368                 needs_entity = true;
4369         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4370                 needs_entity = true;
4371         }
4372
4373         if (needs_entity) {
4374                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4375                 create_variable_entity(entity,
4376                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4377                                        frame_type);
4378         } else {
4379                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4380                 entity->variable.v.value_number = next_value_number_function;
4381                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4382                                         entity);
4383                 ++next_value_number_function;
4384         }
4385 }
4386
4387 static void create_local_static_variable(entity_t *entity)
4388 {
4389         assert(entity->kind == ENTITY_VARIABLE);
4390         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4391
4392         type_t   *type           = skip_typeref(entity->declaration.type);
4393         ir_type  *const var_type = entity->variable.thread_local ?
4394                 get_tls_type() : get_glob_type();
4395         ir_type  *const irtype   = get_ir_type(type);
4396         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4397
4398         size_t l = strlen(entity->base.symbol->string);
4399         char   buf[l + sizeof(".%u")];
4400         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4401         ident     *const id       = id_unique(buf);
4402         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4403
4404         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4405                 set_entity_volatility(irentity, volatility_is_volatile);
4406         }
4407
4408         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4409         entity->variable.v.entity = irentity;
4410
4411         set_entity_ld_ident(irentity, id);
4412         set_entity_visibility(irentity, ir_visibility_local);
4413
4414         if (entity->variable.initializer == NULL) {
4415                 ir_initializer_t *null_init = get_initializer_null();
4416                 set_entity_initializer(irentity, null_init);
4417         }
4418
4419         ir_graph *const old_current_ir_graph = current_ir_graph;
4420         current_ir_graph = get_const_code_irg();
4421
4422         create_variable_initializer(entity);
4423
4424         assert(current_ir_graph == get_const_code_irg());
4425         current_ir_graph = old_current_ir_graph;
4426 }
4427
4428
4429
4430 static ir_node *return_statement_to_firm(return_statement_t *statement)
4431 {
4432         if (!currently_reachable())
4433                 return NULL;
4434
4435         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4436         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4437         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4438
4439         int in_len;
4440         if (!is_type_void(type)) {
4441                 ir_mode *const mode = get_ir_mode_storage(type);
4442                 if (res) {
4443                         res = create_conv(dbgi, res, mode);
4444                         res = do_strict_conv(dbgi, res);
4445                 } else {
4446                         res = new_Unknown(mode);
4447                 }
4448                 in_len = 1;
4449         } else {
4450                 in_len = 0;
4451         }
4452
4453         ir_node *const in[1] = { res };
4454         ir_node *const store = get_store();
4455         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4456
4457         ir_node *end_block = get_irg_end_block(current_ir_graph);
4458         add_immBlock_pred(end_block, ret);
4459
4460         set_unreachable_now();
4461         return NULL;
4462 }
4463
4464 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4465 {
4466         if (!currently_reachable())
4467                 return NULL;
4468
4469         return expression_to_firm(statement->expression);
4470 }
4471
4472 static void create_local_declarations(entity_t*);
4473
4474 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4475 {
4476         create_local_declarations(compound->scope.entities);
4477
4478         ir_node     *result    = NULL;
4479         statement_t *statement = compound->statements;
4480         for ( ; statement != NULL; statement = statement->base.next) {
4481                 result = statement_to_firm(statement);
4482         }
4483
4484         return result;
4485 }
4486
4487 static void create_global_variable(entity_t *entity)
4488 {
4489         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4490         ir_visibility       visibility = ir_visibility_external;
4491         storage_class_tag_t storage
4492                 = (storage_class_tag_t)entity->declaration.storage_class;
4493         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4494         assert(entity->kind == ENTITY_VARIABLE);
4495
4496         switch (storage) {
4497         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4498         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4499         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4500         case STORAGE_CLASS_TYPEDEF:
4501         case STORAGE_CLASS_AUTO:
4502         case STORAGE_CLASS_REGISTER:
4503                 panic("invalid storage class for global var");
4504         }
4505
4506         /* "common" symbols */
4507         if (storage == STORAGE_CLASS_NONE
4508             && entity->variable.initializer == NULL
4509             && !entity->variable.thread_local
4510             && (modifiers & DM_WEAK) == 0) {
4511                 linkage |= IR_LINKAGE_MERGE;
4512         }
4513
4514         ir_type *var_type = get_glob_type();
4515         if (entity->variable.thread_local) {
4516                 var_type = get_tls_type();
4517         }
4518         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4519         ir_entity *irentity = entity->variable.v.entity;
4520         add_entity_linkage(irentity, linkage);
4521         set_entity_visibility(irentity, visibility);
4522         if (entity->variable.initializer == NULL
4523             && storage != STORAGE_CLASS_EXTERN) {
4524                 ir_initializer_t *null_init = get_initializer_null();
4525                 set_entity_initializer(irentity, null_init);
4526         }
4527 }
4528
4529 static void create_local_declaration(entity_t *entity)
4530 {
4531         assert(is_declaration(entity));
4532
4533         /* construct type */
4534         (void) get_ir_type(entity->declaration.type);
4535         if (entity->base.symbol == NULL) {
4536                 return;
4537         }
4538
4539         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4540         case STORAGE_CLASS_STATIC:
4541                 if (entity->kind == ENTITY_FUNCTION) {
4542                         (void)get_function_entity(entity, NULL);
4543                 } else {
4544                         create_local_static_variable(entity);
4545                 }
4546                 return;
4547         case STORAGE_CLASS_EXTERN:
4548                 if (entity->kind == ENTITY_FUNCTION) {
4549                         assert(entity->function.statement == NULL);
4550                         (void)get_function_entity(entity, NULL);
4551                 } else {
4552                         create_global_variable(entity);
4553                         create_variable_initializer(entity);
4554                 }
4555                 return;
4556         case STORAGE_CLASS_NONE:
4557         case STORAGE_CLASS_AUTO:
4558         case STORAGE_CLASS_REGISTER:
4559                 if (entity->kind == ENTITY_FUNCTION) {
4560                         if (entity->function.statement != NULL) {
4561                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4562                                 (void)get_function_entity(entity, owner);
4563                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4564                                 enqueue_inner_function(entity);
4565                         } else {
4566                                 (void)get_function_entity(entity, NULL);
4567                         }
4568                 } else {
4569                         create_local_variable(entity);
4570                 }
4571                 return;
4572         case STORAGE_CLASS_TYPEDEF:
4573                 break;
4574         }
4575         panic("invalid storage class found");
4576 }
4577
4578 static void create_local_declarations(entity_t *e)
4579 {
4580         for (; e; e = e->base.next) {
4581                 if (is_declaration(e))
4582                         create_local_declaration(e);
4583         }
4584 }
4585
4586 static void initialize_local_declaration(entity_t *entity)
4587 {
4588         if (entity->base.symbol == NULL)
4589                 return;
4590
4591         // no need to emit code in dead blocks
4592         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4593                         && !currently_reachable())
4594                 return;
4595
4596         switch ((declaration_kind_t) entity->declaration.kind) {
4597         case DECLARATION_KIND_LOCAL_VARIABLE:
4598         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4599                 create_variable_initializer(entity);
4600                 return;
4601
4602         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4603                 allocate_variable_length_array(entity);
4604                 return;
4605
4606         case DECLARATION_KIND_COMPOUND_MEMBER:
4607         case DECLARATION_KIND_GLOBAL_VARIABLE:
4608         case DECLARATION_KIND_FUNCTION:
4609         case DECLARATION_KIND_INNER_FUNCTION:
4610                 return;
4611
4612         case DECLARATION_KIND_PARAMETER:
4613         case DECLARATION_KIND_PARAMETER_ENTITY:
4614                 panic("can't initialize parameters");
4615
4616         case DECLARATION_KIND_UNKNOWN:
4617                 panic("can't initialize unknown declaration");
4618         }
4619         panic("invalid declaration kind");
4620 }
4621
4622 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4623 {
4624         entity_t *entity = statement->declarations_begin;
4625         if (entity == NULL)
4626                 return NULL;
4627
4628         entity_t *const last = statement->declarations_end;
4629         for ( ;; entity = entity->base.next) {
4630                 if (is_declaration(entity)) {
4631                         initialize_local_declaration(entity);
4632                 } else if (entity->kind == ENTITY_TYPEDEF) {
4633                         /* §6.7.7:3  Any array size expressions associated with variable length
4634                          * array declarators are evaluated each time the declaration of the
4635                          * typedef name is reached in the order of execution. */
4636                         type_t *const type = skip_typeref(entity->typedefe.type);
4637                         if (is_type_array(type) && type->array.is_vla)
4638                                 get_vla_size(&type->array);
4639                 }
4640                 if (entity == last)
4641                         break;
4642         }
4643
4644         return NULL;
4645 }
4646
4647 static ir_node *if_statement_to_firm(if_statement_t *statement)
4648 {
4649         create_local_declarations(statement->scope.entities);
4650
4651         /* Create the condition. */
4652         ir_node *true_block  = NULL;
4653         ir_node *false_block = NULL;
4654         if (currently_reachable()) {
4655                 true_block  = new_immBlock();
4656                 false_block = new_immBlock();
4657                 create_condition_evaluation(statement->condition, true_block, false_block);
4658                 mature_immBlock(true_block);
4659                 mature_immBlock(false_block);
4660         }
4661
4662         /* Create the true statement. */
4663         set_cur_block(true_block);
4664         statement_to_firm(statement->true_statement);
4665         ir_node *fallthrough_block = get_cur_block();
4666
4667         /* Create the false statement. */
4668         set_cur_block(false_block);
4669         if (statement->false_statement != NULL) {
4670                 statement_to_firm(statement->false_statement);
4671         }
4672
4673         /* Handle the block after the if-statement.  Minor simplification and
4674          * optimisation: Reuse the false/true block as fallthrough block, if the
4675          * true/false statement does not pass control to the fallthrough block, e.g.
4676          * in the typical if (x) return; pattern. */
4677         if (fallthrough_block) {
4678                 if (currently_reachable()) {
4679                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4680                         ir_node *const f_jump = new_Jmp();
4681                         ir_node *const in[]   = { t_jump, f_jump };
4682                         fallthrough_block = new_Block(2, in);
4683                 }
4684                 set_cur_block(fallthrough_block);
4685         }
4686
4687         return NULL;
4688 }
4689
4690 /**
4691  * Add an unconditional jump to the target block.  If the source block is not
4692  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4693  * loops.  This is necessary if the jump potentially enters a loop.
4694  */
4695 static void jump_to(ir_node *const target_block)
4696 {
4697         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4698         add_immBlock_pred(target_block, pred);
4699 }
4700
4701 /**
4702  * Add an unconditional jump to the target block, if the current block is
4703  * reachable and do nothing otherwise.  This is only valid if the jump does not
4704  * enter a loop (a back edge is ok).
4705  */
4706 static void jump_if_reachable(ir_node *const target_block)
4707 {
4708         if (currently_reachable())
4709                 add_immBlock_pred(target_block, new_Jmp());
4710 }
4711
4712 static ir_node *while_statement_to_firm(while_statement_t *statement)
4713 {
4714         create_local_declarations(statement->scope.entities);
4715
4716         /* Create the header block */
4717         ir_node *const header_block = new_immBlock();
4718         jump_to(header_block);
4719
4720         /* Create the condition. */
4721         ir_node      *      body_block;
4722         ir_node      *      false_block;
4723         expression_t *const cond = statement->condition;
4724         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4725                         fold_constant_to_bool(cond)) {
4726                 /* Shortcut for while (true). */
4727                 body_block  = header_block;
4728                 false_block = NULL;
4729
4730                 keep_alive(header_block);
4731                 keep_all_memory(header_block);
4732         } else {
4733                 body_block  = new_immBlock();
4734                 false_block = new_immBlock();
4735
4736                 set_cur_block(header_block);
4737                 create_condition_evaluation(cond, body_block, false_block);
4738                 mature_immBlock(body_block);
4739         }
4740
4741         ir_node *const old_continue_label = continue_label;
4742         ir_node *const old_break_label    = break_label;
4743         continue_label = header_block;
4744         break_label    = false_block;
4745
4746         /* Create the loop body. */
4747         set_cur_block(body_block);
4748         statement_to_firm(statement->body);
4749         jump_if_reachable(header_block);
4750
4751         mature_immBlock(header_block);
4752         assert(false_block == NULL || false_block == break_label);
4753         false_block = break_label;
4754         if (false_block != NULL) {
4755                 mature_immBlock(false_block);
4756         }
4757         set_cur_block(false_block);
4758
4759         assert(continue_label == header_block);
4760         continue_label = old_continue_label;
4761         break_label    = old_break_label;
4762         return NULL;
4763 }
4764
4765 static ir_node *get_break_label(void)
4766 {
4767         if (break_label == NULL) {
4768                 break_label = new_immBlock();
4769         }
4770         return break_label;
4771 }
4772
4773 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4774 {
4775         create_local_declarations(statement->scope.entities);
4776
4777         /* create the header block */
4778         ir_node *header_block = new_immBlock();
4779
4780         /* the loop body */
4781         ir_node *body_block = new_immBlock();
4782         jump_to(body_block);
4783
4784         ir_node *old_continue_label = continue_label;
4785         ir_node *old_break_label    = break_label;
4786         continue_label              = header_block;
4787         break_label                 = NULL;
4788
4789         set_cur_block(body_block);
4790         statement_to_firm(statement->body);
4791         ir_node *const false_block = get_break_label();
4792
4793         assert(continue_label == header_block);
4794         continue_label = old_continue_label;
4795         break_label    = old_break_label;
4796
4797         jump_if_reachable(header_block);
4798
4799         /* create the condition */
4800         mature_immBlock(header_block);
4801         set_cur_block(header_block);
4802
4803         create_condition_evaluation(statement->condition, body_block, false_block);
4804         mature_immBlock(body_block);
4805         mature_immBlock(false_block);
4806
4807         set_cur_block(false_block);
4808         return NULL;
4809 }
4810
4811 static ir_node *for_statement_to_firm(for_statement_t *statement)
4812 {
4813         create_local_declarations(statement->scope.entities);
4814
4815         if (currently_reachable()) {
4816                 entity_t *entity = statement->scope.entities;
4817                 for ( ; entity != NULL; entity = entity->base.next) {
4818                         if (!is_declaration(entity))
4819                                 continue;
4820
4821                         initialize_local_declaration(entity);
4822                 }
4823
4824                 if (statement->initialisation != NULL) {
4825                         expression_to_firm(statement->initialisation);
4826                 }
4827         }
4828
4829         /* Create the header block */
4830         ir_node *const header_block = new_immBlock();
4831         jump_to(header_block);
4832
4833         /* Create the condition. */
4834         ir_node *body_block;
4835         ir_node *false_block;
4836         if (statement->condition != NULL) {
4837                 body_block  = new_immBlock();
4838                 false_block = new_immBlock();
4839
4840                 set_cur_block(header_block);
4841                 create_condition_evaluation(statement->condition, body_block, false_block);
4842                 mature_immBlock(body_block);
4843         } else {
4844                 /* for-ever. */
4845                 body_block  = header_block;
4846                 false_block = NULL;
4847
4848                 keep_alive(header_block);
4849                 keep_all_memory(header_block);
4850         }
4851
4852         /* Create the step block, if necessary. */
4853         ir_node      *      step_block = header_block;
4854         expression_t *const step       = statement->step;
4855         if (step != NULL) {
4856                 step_block = new_immBlock();
4857         }
4858
4859         ir_node *const old_continue_label = continue_label;
4860         ir_node *const old_break_label    = break_label;
4861         continue_label = step_block;
4862         break_label    = false_block;
4863
4864         /* Create the loop body. */
4865         set_cur_block(body_block);
4866         statement_to_firm(statement->body);
4867         jump_if_reachable(step_block);
4868
4869         /* Create the step code. */
4870         if (step != NULL) {
4871                 mature_immBlock(step_block);
4872                 set_cur_block(step_block);
4873                 expression_to_firm(step);
4874                 jump_if_reachable(header_block);
4875         }
4876
4877         mature_immBlock(header_block);
4878         assert(false_block == NULL || false_block == break_label);
4879         false_block = break_label;
4880         if (false_block != NULL) {
4881                 mature_immBlock(false_block);
4882         }
4883         set_cur_block(false_block);
4884
4885         assert(continue_label == step_block);
4886         continue_label = old_continue_label;
4887         break_label    = old_break_label;
4888         return NULL;
4889 }
4890
4891 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4892 {
4893         if (!currently_reachable())
4894                 return NULL;
4895
4896         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4897         ir_node  *jump = new_d_Jmp(dbgi);
4898         add_immBlock_pred(target_block, jump);
4899
4900         set_unreachable_now();
4901         return NULL;
4902 }
4903
4904 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4905 {
4906         /* determine number of cases */
4907         size_t n_cases = 0;
4908         for (case_label_statement_t *l = statement->first_case; l != NULL;
4909              l = l->next) {
4910                 /* default case */
4911                 if (l->expression == NULL)
4912                         continue;
4913                 if (l->is_empty_range)
4914                         continue;
4915                 ++n_cases;
4916         }
4917
4918         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4919         size_t           i   = 0;
4920         for (case_label_statement_t *l = statement->first_case; l != NULL;
4921              l = l->next) {
4922             if (l->expression == NULL) {
4923                         l->pn = pn_Switch_default;
4924                         continue;
4925                 }
4926                 if (l->is_empty_range)
4927                         continue;
4928                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4929                 ir_tarval *max = min;
4930                 long       pn  = (long) i+1;
4931                 if (l->end_range != NULL)
4932                         max = fold_constant_to_tarval(l->end_range);
4933                 ir_switch_table_set(res, i++, min, max, pn);
4934                 l->pn = pn;
4935         }
4936         return res;
4937 }
4938
4939 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4940 {
4941         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4942         ir_node  *switch_node = NULL;
4943
4944         if (currently_reachable()) {
4945                 ir_node *expression = expression_to_firm(statement->expression);
4946                 ir_switch_table *table = create_switch_table(statement);
4947                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4948
4949                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4950         }
4951
4952         set_unreachable_now();
4953
4954         ir_node *const old_switch            = current_switch;
4955         ir_node *const old_break_label       = break_label;
4956         const bool     old_saw_default_label = saw_default_label;
4957         saw_default_label                    = false;
4958         current_switch                       = switch_node;
4959         break_label                          = NULL;
4960
4961         statement_to_firm(statement->body);
4962
4963         if (currently_reachable()) {
4964                 add_immBlock_pred(get_break_label(), new_Jmp());
4965         }
4966
4967         if (!saw_default_label && switch_node) {
4968                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4969                 add_immBlock_pred(get_break_label(), proj);
4970         }
4971
4972         if (break_label != NULL) {
4973                 mature_immBlock(break_label);
4974         }
4975         set_cur_block(break_label);
4976
4977         assert(current_switch == switch_node);
4978         current_switch    = old_switch;
4979         break_label       = old_break_label;
4980         saw_default_label = old_saw_default_label;
4981         return NULL;
4982 }
4983
4984 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4985 {
4986         if (statement->is_empty_range)
4987                 return NULL;
4988
4989         if (current_switch != NULL) {
4990                 ir_node *block = new_immBlock();
4991                 /* Fallthrough from previous case */
4992                 jump_if_reachable(block);
4993
4994                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4995                 add_immBlock_pred(block, proj);
4996                 if (statement->expression == NULL)
4997                         saw_default_label = true;
4998
4999                 mature_immBlock(block);
5000                 set_cur_block(block);
5001         }
5002
5003         return statement_to_firm(statement->statement);
5004 }
5005
5006 static ir_node *label_to_firm(const label_statement_t *statement)
5007 {
5008         ir_node *block = get_label_block(statement->label);
5009         jump_to(block);
5010
5011         set_cur_block(block);
5012         keep_alive(block);
5013         keep_all_memory(block);
5014
5015         return statement_to_firm(statement->statement);
5016 }
5017
5018 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5019 {
5020         if (!currently_reachable())
5021                 return NULL;
5022
5023         ir_node  *const irn  = expression_to_firm(statement->expression);
5024         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5025         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
5026
5027         set_irn_link(ijmp, ijmp_list);
5028         ijmp_list = ijmp;
5029
5030         set_unreachable_now();
5031         return NULL;
5032 }
5033
5034 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5035 {
5036         bool needs_memory = false;
5037
5038         if (statement->is_volatile) {
5039                 needs_memory = true;
5040         }
5041
5042         size_t         n_clobbers = 0;
5043         asm_clobber_t *clobber    = statement->clobbers;
5044         for ( ; clobber != NULL; clobber = clobber->next) {
5045                 const char *clobber_str = clobber->clobber.begin;
5046
5047                 if (!be_is_valid_clobber(clobber_str)) {
5048                         errorf(&statement->base.source_position,
5049                                    "invalid clobber '%s' specified", clobber->clobber);
5050                         continue;
5051                 }
5052
5053                 if (streq(clobber_str, "memory")) {
5054                         needs_memory = true;
5055                         continue;
5056                 }
5057
5058                 ident *id = new_id_from_str(clobber_str);
5059                 obstack_ptr_grow(&asm_obst, id);
5060                 ++n_clobbers;
5061         }
5062         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5063         ident **clobbers = NULL;
5064         if (n_clobbers > 0) {
5065                 clobbers = obstack_finish(&asm_obst);
5066         }
5067
5068         size_t n_inputs  = 0;
5069         asm_argument_t *argument = statement->inputs;
5070         for ( ; argument != NULL; argument = argument->next)
5071                 n_inputs++;
5072         size_t n_outputs = 0;
5073         argument = statement->outputs;
5074         for ( ; argument != NULL; argument = argument->next)
5075                 n_outputs++;
5076
5077         unsigned next_pos = 0;
5078
5079         ir_node *ins[n_inputs + n_outputs + 1];
5080         size_t   in_size = 0;
5081
5082         ir_asm_constraint tmp_in_constraints[n_outputs];
5083
5084         const expression_t *out_exprs[n_outputs];
5085         ir_node            *out_addrs[n_outputs];
5086         size_t              out_size = 0;
5087
5088         argument = statement->outputs;
5089         for ( ; argument != NULL; argument = argument->next) {
5090                 const char *constraints = argument->constraints.begin;
5091                 asm_constraint_flags_t asm_flags
5092                         = be_parse_asm_constraints(constraints);
5093
5094                 {
5095                         source_position_t const *const pos = &statement->base.source_position;
5096                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5097                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5098                         }
5099                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5100                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5101                                 continue;
5102                         }
5103                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5104                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5105                                 continue;
5106                         }
5107                 }
5108
5109                 unsigned pos = next_pos++;
5110                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5111                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5112                         expression_t *expr = argument->expression;
5113                         ir_node      *addr = expression_to_addr(expr);
5114                         /* in+output, construct an artifical same_as constraint on the
5115                          * input */
5116                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5117                                 char     buf[64];
5118                                 ir_node *value = get_value_from_lvalue(expr, addr);
5119
5120                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5121
5122                                 ir_asm_constraint constraint;
5123                                 constraint.pos              = pos;
5124                                 constraint.constraint       = new_id_from_str(buf);
5125                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5126                                 tmp_in_constraints[in_size] = constraint;
5127                                 ins[in_size] = value;
5128
5129                                 ++in_size;
5130                         }
5131
5132                         out_exprs[out_size] = expr;
5133                         out_addrs[out_size] = addr;
5134                         ++out_size;
5135                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5136                         /* pure memory ops need no input (but we have to make sure we
5137                          * attach to the memory) */
5138                         assert(! (asm_flags &
5139                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5140                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5141                         needs_memory = true;
5142
5143                         /* we need to attach the address to the inputs */
5144                         expression_t *expr = argument->expression;
5145
5146                         ir_asm_constraint constraint;
5147                         constraint.pos              = pos;
5148                         constraint.constraint       = new_id_from_str(constraints);
5149                         constraint.mode             = mode_M;
5150                         tmp_in_constraints[in_size] = constraint;
5151
5152                         ins[in_size]          = expression_to_addr(expr);
5153                         ++in_size;
5154                         continue;
5155                 } else {
5156                         errorf(&statement->base.source_position,
5157                                "only modifiers but no place set in constraints '%s'",
5158                                constraints);
5159                         continue;
5160                 }
5161
5162                 ir_asm_constraint constraint;
5163                 constraint.pos        = pos;
5164                 constraint.constraint = new_id_from_str(constraints);
5165                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5166
5167                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5168         }
5169         assert(obstack_object_size(&asm_obst)
5170                         == out_size * sizeof(ir_asm_constraint));
5171         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5172
5173
5174         obstack_grow(&asm_obst, tmp_in_constraints,
5175                      in_size * sizeof(tmp_in_constraints[0]));
5176         /* find and count input and output arguments */
5177         argument = statement->inputs;
5178         for ( ; argument != NULL; argument = argument->next) {
5179                 const char *constraints = argument->constraints.begin;
5180                 asm_constraint_flags_t asm_flags
5181                         = be_parse_asm_constraints(constraints);
5182
5183                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5184                         errorf(&statement->base.source_position,
5185                                "some constraints in '%s' are not supported", constraints);
5186                         continue;
5187                 }
5188                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5189                         errorf(&statement->base.source_position,
5190                                "some constraints in '%s' are invalid", constraints);
5191                         continue;
5192                 }
5193                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5194                         errorf(&statement->base.source_position,
5195                                "write flag specified for input constraints '%s'",
5196                                constraints);
5197                         continue;
5198                 }
5199
5200                 ir_node *input;
5201                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5202                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5203                         /* we can treat this as "normal" input */
5204                         input = expression_to_firm(argument->expression);
5205                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5206                         /* pure memory ops need no input (but we have to make sure we
5207                          * attach to the memory) */
5208                         assert(! (asm_flags &
5209                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5210                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5211                         needs_memory = true;
5212                         input = expression_to_addr(argument->expression);
5213                 } else {
5214                         errorf(&statement->base.source_position,
5215                                "only modifiers but no place set in constraints '%s'",
5216                                constraints);
5217                         continue;
5218                 }
5219
5220                 ir_asm_constraint constraint;
5221                 constraint.pos        = next_pos++;
5222                 constraint.constraint = new_id_from_str(constraints);
5223                 constraint.mode       = get_irn_mode(input);
5224
5225                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5226                 ins[in_size++] = input;
5227         }
5228
5229         if (needs_memory) {
5230                 ir_asm_constraint constraint;
5231                 constraint.pos        = next_pos++;
5232                 constraint.constraint = new_id_from_str("");
5233                 constraint.mode       = mode_M;
5234
5235                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5236                 ins[in_size++] = get_store();
5237         }
5238
5239         assert(obstack_object_size(&asm_obst)
5240                         == in_size * sizeof(ir_asm_constraint));
5241         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5242
5243         /* create asm node */
5244         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5245
5246         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5247
5248         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5249                                   out_size, output_constraints,
5250                                   n_clobbers, clobbers, asm_text);
5251
5252         if (statement->is_volatile) {
5253                 set_irn_pinned(node, op_pin_state_pinned);
5254         } else {
5255                 set_irn_pinned(node, op_pin_state_floats);
5256         }
5257
5258         /* create output projs & connect them */
5259         if (needs_memory) {
5260                 ir_node *projm = new_Proj(node, mode_M, out_size);
5261                 set_store(projm);
5262         }
5263
5264         size_t i;
5265         for (i = 0; i < out_size; ++i) {
5266                 const expression_t *out_expr = out_exprs[i];
5267                 long                pn       = i;
5268                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5269                 ir_node            *proj     = new_Proj(node, mode, pn);
5270                 ir_node            *addr     = out_addrs[i];
5271
5272                 set_value_for_expression_addr(out_expr, proj, addr);
5273         }
5274
5275         return NULL;
5276 }
5277
5278 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5279 {
5280         statement_to_firm(statement->try_statement);
5281         source_position_t const *const pos = &statement->base.source_position;
5282         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5283         return NULL;
5284 }
5285
5286 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5287 {
5288         errorf(&statement->base.source_position, "__leave not supported yet");
5289         return NULL;
5290 }
5291
5292 /**
5293  * Transform a statement.
5294  */
5295 static ir_node *statement_to_firm(statement_t *const stmt)
5296 {
5297 #ifndef NDEBUG
5298         assert(!stmt->base.transformed);
5299         stmt->base.transformed = true;
5300 #endif
5301
5302         switch (stmt->kind) {
5303         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5304         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5305         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5306         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5307         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5308         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5309         case STATEMENT_EMPTY:         return NULL; /* nothing */
5310         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5311         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5312         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5313         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5314         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5315         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5316         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5317         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5318         case STATEMENT_WHILE:         return while_statement_to_firm(      &stmt->whiles);
5319
5320         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5321         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5322         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5323
5324         case STATEMENT_ERROR: panic("error statement found");
5325         }
5326         panic("statement not implemented");
5327 }
5328
5329 static int count_local_variables(const entity_t *entity,
5330                                  const entity_t *const last)
5331 {
5332         int count = 0;
5333         entity_t const *const end = last != NULL ? last->base.next : NULL;
5334         for (; entity != end; entity = entity->base.next) {
5335                 type_t *type;
5336                 bool    address_taken;
5337
5338                 if (entity->kind == ENTITY_VARIABLE) {
5339                         type          = skip_typeref(entity->declaration.type);
5340                         address_taken = entity->variable.address_taken;
5341                 } else if (entity->kind == ENTITY_PARAMETER) {
5342                         type          = skip_typeref(entity->declaration.type);
5343                         address_taken = entity->parameter.address_taken;
5344                 } else {
5345                         continue;
5346                 }
5347
5348                 if (!address_taken && is_type_scalar(type))
5349                         ++count;
5350         }
5351         return count;
5352 }
5353
5354 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5355 {
5356         int *const count = env;
5357
5358         switch (stmt->kind) {
5359         case STATEMENT_DECLARATION: {
5360                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5361                 *count += count_local_variables(decl_stmt->declarations_begin,
5362                                 decl_stmt->declarations_end);
5363                 break;
5364         }
5365
5366         case STATEMENT_FOR:
5367                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5368                 break;
5369
5370         default:
5371                 break;
5372         }
5373 }
5374
5375 /**
5376  * Return the number of local (alias free) variables used by a function.
5377  */
5378 static int get_function_n_local_vars(entity_t *entity)
5379 {
5380         const function_t *function = &entity->function;
5381         int count = 0;
5382
5383         /* count parameters */
5384         count += count_local_variables(function->parameters.entities, NULL);
5385
5386         /* count local variables declared in body */
5387         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5388         return count;
5389 }
5390
5391 /**
5392  * Build Firm code for the parameters of a function.
5393  */
5394 static void initialize_function_parameters(entity_t *entity)
5395 {
5396         assert(entity->kind == ENTITY_FUNCTION);
5397         ir_graph *irg             = current_ir_graph;
5398         ir_node  *args            = get_irg_args(irg);
5399         int       n               = 0;
5400         ir_type  *function_irtype;
5401
5402         if (entity->function.need_closure) {
5403                 /* add an extra parameter for the static link */
5404                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5405                 ++n;
5406
5407                 /* Matze: IMO this is wrong, nested functions should have an own
5408                  * type and not rely on strange parameters... */
5409                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5410         } else {
5411                 function_irtype = get_ir_type(entity->declaration.type);
5412         }
5413
5414
5415
5416         entity_t *parameter = entity->function.parameters.entities;
5417         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5418                 if (parameter->kind != ENTITY_PARAMETER)
5419                         continue;
5420
5421                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5422                 type_t *type = skip_typeref(parameter->declaration.type);
5423
5424                 bool needs_entity = parameter->parameter.address_taken;
5425                 assert(!is_type_array(type));
5426                 if (is_type_compound(type)) {
5427                         needs_entity = true;
5428                 }
5429
5430                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5431                 if (needs_entity) {
5432                         ir_type   *frame_type = get_irg_frame_type(irg);
5433                         ir_entity *param
5434                                 = new_parameter_entity(frame_type, n, param_irtype);
5435                         parameter->declaration.kind
5436                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5437                         parameter->parameter.v.entity = param;
5438                         continue;
5439                 }
5440
5441                 ir_mode *param_mode = get_type_mode(param_irtype);
5442                 long     pn         = n;
5443                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5444
5445                 ir_mode *mode = get_ir_mode_storage(type);
5446                 value = create_conv(NULL, value, mode);
5447                 value = do_strict_conv(NULL, value);
5448
5449                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5450                 parameter->parameter.v.value_number = next_value_number_function;
5451                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5452                                         parameter);
5453                 ++next_value_number_function;
5454
5455                 set_value(parameter->parameter.v.value_number, value);
5456         }
5457 }
5458
5459 /**
5460  * Handle additional decl modifiers for IR-graphs
5461  *
5462  * @param irg            the IR-graph
5463  * @param dec_modifiers  additional modifiers
5464  */
5465 static void handle_decl_modifier_irg(ir_graph *irg,
5466                                      decl_modifiers_t decl_modifiers)
5467 {
5468         if (decl_modifiers & DM_NAKED) {
5469                 /* TRUE if the declaration includes the Microsoft
5470                    __declspec(naked) specifier. */
5471                 add_irg_additional_properties(irg, mtp_property_naked);
5472         }
5473         if (decl_modifiers & DM_FORCEINLINE) {
5474                 /* TRUE if the declaration includes the
5475                    Microsoft __forceinline specifier. */
5476                 set_irg_inline_property(irg, irg_inline_forced);
5477         }
5478         if (decl_modifiers & DM_NOINLINE) {
5479                 /* TRUE if the declaration includes the Microsoft
5480                    __declspec(noinline) specifier. */
5481                 set_irg_inline_property(irg, irg_inline_forbidden);
5482         }
5483 }
5484
5485 static void add_function_pointer(ir_type *segment, ir_entity *method,
5486                                  const char *unique_template)
5487 {
5488         ir_type   *method_type  = get_entity_type(method);
5489         ir_type   *ptr_type     = new_type_pointer(method_type);
5490
5491         /* these entities don't really have a name but firm only allows
5492          * "" in ld_ident.
5493          * Note that we mustn't give these entities a name since for example
5494          * Mach-O doesn't allow them. */
5495         ident     *ide          = id_unique(unique_template);
5496         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5497         ir_graph  *irg          = get_const_code_irg();
5498         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5499                                                            method);
5500
5501         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5502         set_entity_compiler_generated(ptr, 1);
5503         set_entity_visibility(ptr, ir_visibility_private);
5504         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5505         set_atomic_ent_value(ptr, val);
5506 }
5507
5508 /**
5509  * Generate possible IJmp branches to a given label block.
5510  */
5511 static void gen_ijmp_branches(ir_node *block)
5512 {
5513         ir_node *ijmp;
5514         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5515                 add_immBlock_pred(block, ijmp);
5516         }
5517 }
5518
5519 /**
5520  * Create code for a function and all inner functions.
5521  *
5522  * @param entity  the function entity
5523  */
5524 static void create_function(entity_t *entity)
5525 {
5526         assert(entity->kind == ENTITY_FUNCTION);
5527         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5528
5529         if (entity->function.statement == NULL)
5530                 return;
5531
5532         inner_functions     = NULL;
5533         current_trampolines = NULL;
5534
5535         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5536                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5537                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5538         }
5539         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5540                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5541                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5542         }
5543
5544         current_function_entity = entity;
5545         current_function_name   = NULL;
5546         current_funcsig         = NULL;
5547
5548         assert(all_labels == NULL);
5549         all_labels = NEW_ARR_F(label_t *, 0);
5550         ijmp_list  = NULL;
5551
5552         int       n_local_vars = get_function_n_local_vars(entity);
5553         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5554         current_ir_graph = irg;
5555
5556         ir_graph *old_current_function = current_function;
5557         current_function = irg;
5558
5559         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5560         current_vararg_entity = NULL;
5561
5562         set_irg_fp_model(irg, firm_fp_model);
5563         tarval_enable_fp_ops(1);
5564         set_irn_dbg_info(get_irg_start_block(irg),
5565                          get_entity_dbg_info(function_entity));
5566
5567         /* set inline flags */
5568         if (entity->function.is_inline)
5569                 set_irg_inline_property(irg, irg_inline_recomended);
5570         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5571
5572         next_value_number_function = 0;
5573         initialize_function_parameters(entity);
5574         current_static_link = entity->function.static_link;
5575
5576         statement_to_firm(entity->function.statement);
5577
5578         ir_node *end_block = get_irg_end_block(irg);
5579
5580         /* do we have a return statement yet? */
5581         if (currently_reachable()) {
5582                 type_t *type = skip_typeref(entity->declaration.type);
5583                 assert(is_type_function(type));
5584                 type_t *const return_type = skip_typeref(type->function.return_type);
5585
5586                 ir_node *ret;
5587                 if (is_type_void(return_type)) {
5588                         ret = new_Return(get_store(), 0, NULL);
5589                 } else {
5590                         ir_mode *const mode = get_ir_mode_storage(return_type);
5591
5592                         ir_node *in[1];
5593                         /* §5.1.2.2.3 main implicitly returns 0 */
5594                         if (is_main(entity)) {
5595                                 in[0] = new_Const(get_mode_null(mode));
5596                         } else {
5597                                 in[0] = new_Unknown(mode);
5598                         }
5599                         ret = new_Return(get_store(), 1, in);
5600                 }
5601                 add_immBlock_pred(end_block, ret);
5602         }
5603
5604         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5605                 label_t *label = all_labels[i];
5606                 if (label->address_taken) {
5607                         gen_ijmp_branches(label->block);
5608                 }
5609                 mature_immBlock(label->block);
5610         }
5611
5612         DEL_ARR_F(all_labels);
5613         all_labels = NULL;
5614
5615         irg_finalize_cons(irg);
5616
5617         /* finalize the frame type */
5618         ir_type *frame_type = get_irg_frame_type(irg);
5619         int      n          = get_compound_n_members(frame_type);
5620         int      align_all  = 4;
5621         int      offset     = 0;
5622         for (int i = 0; i < n; ++i) {
5623                 ir_entity *member      = get_compound_member(frame_type, i);
5624                 ir_type   *entity_type = get_entity_type(member);
5625
5626                 int align = get_type_alignment_bytes(entity_type);
5627                 if (align > align_all)
5628                         align_all = align;
5629                 int misalign = 0;
5630                 if (align > 0) {
5631                         misalign  = offset % align;
5632                         if (misalign > 0) {
5633                                 offset += align - misalign;
5634                         }
5635                 }
5636
5637                 set_entity_offset(member, offset);
5638                 offset += get_type_size_bytes(entity_type);
5639         }
5640         set_type_size_bytes(frame_type, offset);
5641         set_type_alignment_bytes(frame_type, align_all);
5642
5643         irg_verify(irg, VERIFY_ENFORCE_SSA);
5644         current_vararg_entity = old_current_vararg_entity;
5645         current_function      = old_current_function;
5646
5647         if (current_trampolines != NULL) {
5648                 DEL_ARR_F(current_trampolines);
5649                 current_trampolines = NULL;
5650         }
5651
5652         /* create inner functions if any */
5653         entity_t **inner = inner_functions;
5654         if (inner != NULL) {
5655                 ir_type *rem_outer_frame      = current_outer_frame;
5656                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5657                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5658                         create_function(inner[i]);
5659                 }
5660                 DEL_ARR_F(inner);
5661
5662                 current_outer_frame      = rem_outer_frame;
5663         }
5664 }
5665
5666 static void scope_to_firm(scope_t *scope)
5667 {
5668         /* first pass: create declarations */
5669         entity_t *entity = scope->entities;
5670         for ( ; entity != NULL; entity = entity->base.next) {
5671                 if (entity->base.symbol == NULL)
5672                         continue;
5673
5674                 if (entity->kind == ENTITY_FUNCTION) {
5675                         if (entity->function.btk != BUILTIN_NONE) {
5676                                 /* builtins have no representation */
5677                                 continue;
5678                         }
5679                         (void)get_function_entity(entity, NULL);
5680                 } else if (entity->kind == ENTITY_VARIABLE) {
5681                         create_global_variable(entity);
5682                 } else if (entity->kind == ENTITY_NAMESPACE) {
5683                         scope_to_firm(&entity->namespacee.members);
5684                 }
5685         }
5686
5687         /* second pass: create code/initializers */
5688         entity = scope->entities;
5689         for ( ; entity != NULL; entity = entity->base.next) {
5690                 if (entity->base.symbol == NULL)
5691                         continue;
5692
5693                 if (entity->kind == ENTITY_FUNCTION) {
5694                         if (entity->function.btk != BUILTIN_NONE) {
5695                                 /* builtins have no representation */
5696                                 continue;
5697                         }
5698                         create_function(entity);
5699                 } else if (entity->kind == ENTITY_VARIABLE) {
5700                         assert(entity->declaration.kind
5701                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5702                         current_ir_graph = get_const_code_irg();
5703                         create_variable_initializer(entity);
5704                 }
5705         }
5706 }
5707
5708 void init_ast2firm(void)
5709 {
5710         obstack_init(&asm_obst);
5711         init_atomic_modes();
5712
5713         ir_set_debug_retrieve(dbg_retrieve);
5714         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5715
5716         /* create idents for all known runtime functions */
5717         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5718                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5719         }
5720
5721         entitymap_init(&entitymap);
5722 }
5723
5724 static void init_ir_types(void)
5725 {
5726         static int ir_types_initialized = 0;
5727         if (ir_types_initialized)
5728                 return;
5729         ir_types_initialized = 1;
5730
5731         ir_type_char       = get_ir_type(type_char);
5732         ir_type_const_char = get_ir_type(type_const_char);
5733         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5734
5735         be_params             = be_get_backend_param();
5736         mode_float_arithmetic = be_params->mode_float_arithmetic;
5737
5738         stack_param_align     = be_params->stack_param_align;
5739 }
5740
5741 void exit_ast2firm(void)
5742 {
5743         entitymap_destroy(&entitymap);
5744         obstack_free(&asm_obst, NULL);
5745 }
5746
5747 static void global_asm_to_firm(statement_t *s)
5748 {
5749         for (; s != NULL; s = s->base.next) {
5750                 assert(s->kind == STATEMENT_ASM);
5751
5752                 char const *const text = s->asms.asm_text.begin;
5753                 size_t            size = s->asms.asm_text.size;
5754
5755                 /* skip the last \0 */
5756                 if (text[size - 1] == '\0')
5757                         --size;
5758
5759                 ident *const id = new_id_from_chars(text, size);
5760                 add_irp_asm(id);
5761         }
5762 }
5763
5764 static const char *get_cwd(void)
5765 {
5766         static char buf[1024];
5767         if (buf[0] == '\0')
5768                 getcwd(buf, sizeof(buf));
5769         return buf;
5770 }
5771
5772 void translation_unit_to_firm(translation_unit_t *unit)
5773 {
5774         if (c_mode & _CXX) {
5775                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5776         } else if (c_mode & _C99) {
5777                 be_dwarf_set_source_language(DW_LANG_C99);
5778         } else if (c_mode & _C89) {
5779                 be_dwarf_set_source_language(DW_LANG_C89);
5780         } else {
5781                 be_dwarf_set_source_language(DW_LANG_C);
5782         }
5783         be_dwarf_set_compilation_directory(get_cwd());
5784
5785         /* initialize firm arithmetic */
5786         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5787         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5788
5789         /* just to be sure */
5790         continue_label           = NULL;
5791         break_label              = NULL;
5792         current_switch           = NULL;
5793         current_translation_unit = unit;
5794
5795         init_ir_types();
5796
5797         scope_to_firm(&unit->scope);
5798         global_asm_to_firm(unit->global_asm);
5799
5800         current_ir_graph         = NULL;
5801         current_translation_unit = NULL;
5802 }