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_wchar_t;
  67
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int        next_value_number_function;
  75 static ir_node   *continue_label;
  76 static ir_node   *break_label;
  77 static ir_node   *current_switch;
  78 static bool       saw_default_label;
  79 static label_t  **all_labels;
  80 static entity_t **inner_functions;
  81 static ir_node   *ijmp_list;
  82 static bool       constant_folding;
  83
  84 #define PUSH_BREAK(val) \
  85         ir_node *const old_break_label = break_label; \
  86         ((void)(break_label = (val)))
  87 #define POP_BREAK() \
  88         ((void)(break_label = old_break_label))
  89
  90 #define PUSH_CONTINUE(val) \
  91         ir_node *const old_continue_label = continue_label; \
  92         ((void)(continue_label = (val)))
  93 #define POP_CONTINUE() \
  94         ((void)(continue_label = old_continue_label))
  95
  96 #define PUSH_IRG(val) \
  97         ir_graph *const old_irg = current_ir_graph; \
  98         ir_graph *const new_irg = (val); \
  99         ((void)(current_ir_graph = new_irg))
 100
 101 #define POP_IRG() \
 102         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
 103
 104 static const entity_t     *current_function_entity;
 105 static ir_node            *current_function_name;
 106 static ir_node            *current_funcsig;
 107 static ir_graph           *current_function;
 108 static translation_unit_t *current_translation_unit;
 109 static trampoline_region  *current_trampolines;
 110 static ir_type            *current_outer_frame;
 111 static ir_node            *current_static_link;
 112 static ir_entity          *current_vararg_entity;
 113
 114 static entitymap_t  entitymap;
 115
 116 static struct obstack asm_obst;
 117
 118 typedef enum declaration_kind_t {
 119         DECLARATION_KIND_UNKNOWN,
 120         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 121         DECLARATION_KIND_GLOBAL_VARIABLE,
 122         DECLARATION_KIND_LOCAL_VARIABLE,
 123         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 124         DECLARATION_KIND_PARAMETER,
 125         DECLARATION_KIND_PARAMETER_ENTITY,
 126         DECLARATION_KIND_FUNCTION,
 127         DECLARATION_KIND_COMPOUND_MEMBER,
 128         DECLARATION_KIND_INNER_FUNCTION
 129 } declaration_kind_t;
 130
 131 static ir_type *get_ir_type_incomplete(type_t *type);
 132
 133 static void enqueue_inner_function(entity_t *entity)
 134 {
 135         if (inner_functions == NULL)
 136                 inner_functions = NEW_ARR_F(entity_t *, 0);
 137         ARR_APP1(entity_t*, inner_functions, entity);
 138 }
 139
 140 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 141 {
 142         const entity_t *entity = get_irg_loc_description(irg, pos);
 143
 144         if (entity != NULL) {
 145                 source_position_t const *const pos = &entity->base.source_position;
 146                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 147         }
 148         return new_r_Unknown(irg, mode);
 149 }
 150
 151 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 152 {
 153         source_position_t const *const pos = (source_position_t const*)dbg;
 154         if (pos) {
 155                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 156         } else {
 157                 return (src_loc_t){ NULL, 0, 0 };
 158         }
 159 }
 160
 161 static dbg_info *get_dbg_info(const source_position_t *pos)
 162 {
 163         return (dbg_info*) pos;
 164 }
 165
 166 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 167                                     const type_dbg_info *dbg)
 168 {
 169         assert(dbg != NULL);
 170         print_to_buffer(buffer, buffer_size);
 171         const type_t *type = (const type_t*) dbg;
 172         print_type(type);
 173         finish_print_to_buffer();
 174 }
 175
 176 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 177 {
 178         return (type_dbg_info*) type;
 179 }
 180
 181 /* is the current block a reachable one? */
 182 static bool currently_reachable(void)
 183 {
 184         ir_node *const block = get_cur_block();
 185         return block != NULL && !is_Bad(block);
 186 }
 187
 188 static void set_unreachable_now(void)
 189 {
 190         set_cur_block(NULL);
 191 }
 192
 193 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 194
 195 static ir_node *_expression_to_firm(const expression_t *expression);
 196 static ir_node *expression_to_firm(const expression_t *expression);
 197
 198 static unsigned decide_modulo_shift(unsigned type_size)
 199 {
 200         if (architecture_modulo_shift == 0)
 201                 return 0;
 202         if (type_size < architecture_modulo_shift)
 203                 return architecture_modulo_shift;
 204         return type_size;
 205 }
 206
 207 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 208 {
 209         unsigned flags = get_atomic_type_flags(kind);
 210         unsigned size  = get_atomic_type_size(kind);
 211         if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
 212             && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 213                 switch (size) {
 214                 case 4:  return get_modeF();
 215                 case 8:  return get_modeD();
 216                 default: panic("unexpected kind");
 217                 }
 218         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 219                 char            name[64];
 220                 unsigned        bit_size     = size * 8;
 221                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 222                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 223
 224                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 225                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 226                                     modulo_shift);
 227         }
 228
 229         return NULL;
 230 }
 231
 232 /**
 233  * Initialises the atomic modes depending on the machine size.
 234  */
 235 static void init_atomic_modes(void)
 236 {
 237         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 238         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 239                 if (atomic_modes[i] != NULL)
 240                         continue;
 241                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 242         }
 243 }
 244
 245 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 246 {
 247         assert(kind <= ATOMIC_TYPE_LAST);
 248         return atomic_modes[kind];
 249 }
 250
 251 static ir_node *get_vla_size(array_type_t *const type)
 252 {
 253         ir_node *size_node = type->size_node;
 254         if (size_node == NULL) {
 255                 size_node = expression_to_firm(type->size_expression);
 256                 type->size_node = size_node;
 257         }
 258         return size_node;
 259 }
 260
 261 static unsigned count_parameters(const function_type_t *function_type)
 262 {
 263         unsigned count = 0;
 264
 265         function_parameter_t *parameter = function_type->parameters;
 266         for ( ; parameter != NULL; parameter = parameter->next) {
 267                 ++count;
 268         }
 269
 270         return count;
 271 }
 272
 273 /**
 274  * Creates a Firm type for an atomic type
 275  */
 276 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 277 {
 278         ir_mode        *mode      = atomic_modes[akind];
 279         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 280         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 281         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 282
 283         set_type_size_bytes(irtype, get_atomic_type_size(akind));
 284         set_type_alignment_bytes(irtype, alignment);
 285
 286         return irtype;
 287 }
 288
 289 /**
 290  * Creates a Firm type for a complex type
 291  */
 292 static ir_type *create_complex_type(const atomic_type_t *type)
 293 {
 294         atomic_type_kind_t  kind = type->akind;
 295         ir_mode            *mode = atomic_modes[kind];
 296         ident              *id   = get_mode_ident(mode);
 297
 298         (void) id;
 299
 300         /* FIXME: finish the array */
 301         return NULL;
 302 }
 303
 304 /**
 305  * Creates a Firm type for an imaginary type
 306  */
 307 static ir_type *create_imaginary_type(const atomic_type_t *type)
 308 {
 309         return create_atomic_type(type->akind, (const type_t*)type);
 310 }
 311
 312 /**
 313  * return type of a parameter (and take transparent union gnu extension into
 314  * account)
 315  */
 316 static type_t *get_parameter_type(type_t *orig_type)
 317 {
 318         type_t *type = skip_typeref(orig_type);
 319         if (is_type_union(type)
 320                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 321                 compound_t *compound = type->compound.compound;
 322                 type                 = compound->members.entities->declaration.type;
 323         }
 324
 325         return type;
 326 }
 327
 328 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 329 {
 330         type_t        *return_type  = skip_typeref(function_type->return_type);
 331
 332         int            n_parameters = count_parameters(function_type)
 333                                        + (for_closure ? 1 : 0);
 334         int            n_results    = is_type_void(return_type) ? 0 : 1;
 335         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 336         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 337
 338         if (!is_type_void(return_type)) {
 339                 ir_type *restype = get_ir_type(return_type);
 340                 set_method_res_type(irtype, 0, restype);
 341         }
 342
 343         function_parameter_t *parameter = function_type->parameters;
 344         int                   n         = 0;
 345         if (for_closure) {
 346                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 347                 set_method_param_type(irtype, n, p_irtype);
 348                 ++n;
 349         }
 350         for ( ; parameter != NULL; parameter = parameter->next) {
 351                 type_t  *type     = get_parameter_type(parameter->type);
 352                 ir_type *p_irtype = get_ir_type(type);
 353                 set_method_param_type(irtype, n, p_irtype);
 354                 ++n;
 355         }
 356
 357         bool is_variadic = function_type->variadic;
 358
 359         if (is_variadic)
 360                 set_method_variadicity(irtype, variadicity_variadic);
 361
 362         unsigned cc = get_method_calling_convention(irtype);
 363         switch (function_type->calling_convention) {
 364         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 365         case CC_CDECL:
 366 is_cdecl:
 367                 set_method_calling_convention(irtype, SET_CDECL(cc));
 368                 break;
 369
 370         case CC_STDCALL:
 371                 if (is_variadic)
 372                         goto is_cdecl;
 373
 374                 /* only non-variadic function can use stdcall, else use cdecl */
 375                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 376                 break;
 377
 378         case CC_FASTCALL:
 379                 if (is_variadic)
 380                         goto is_cdecl;
 381                 /* only non-variadic function can use fastcall, else use cdecl */
 382                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 383                 break;
 384
 385         case CC_THISCALL:
 386                 /* Hmm, leave default, not accepted by the parser yet. */
 387                 break;
 388         }
 389
 390         if (for_closure)
 391                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 392
 393         const decl_modifiers_t modifiers = function_type->modifiers;
 394         if (modifiers & DM_CONST)
 395                 add_method_additional_properties(irtype, mtp_property_const);
 396         if (modifiers & DM_PURE)
 397                 add_method_additional_properties(irtype, mtp_property_pure);
 398         if (modifiers & DM_RETURNS_TWICE)
 399                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 400         if (modifiers & DM_NORETURN)
 401                 add_method_additional_properties(irtype, mtp_property_noreturn);
 402         if (modifiers & DM_NOTHROW)
 403                 add_method_additional_properties(irtype, mtp_property_nothrow);
 404         if (modifiers & DM_MALLOC)
 405                 add_method_additional_properties(irtype, mtp_property_malloc);
 406
 407         return irtype;
 408 }
 409
 410 static ir_type *create_pointer_type(pointer_type_t *type)
 411 {
 412         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 413         type_t        *points_to    = type->points_to;
 414         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 415         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 416
 417         return irtype;
 418 }
 419
 420 static ir_type *create_reference_type(reference_type_t *type)
 421 {
 422         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 423         type_t        *refers_to    = type->refers_to;
 424         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 425         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 426
 427         return irtype;
 428 }
 429
 430 static ir_type *create_array_type(array_type_t *type)
 431 {
 432         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 433         type_t        *element_type    = type->element_type;
 434         ir_type       *ir_element_type = get_ir_type(element_type);
 435         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 436
 437         const int align = get_type_alignment_bytes(ir_element_type);
 438         set_type_alignment_bytes(irtype, align);
 439
 440         if (type->size_constant) {
 441                 int n_elements = type->size;
 442
 443                 set_array_bounds_int(irtype, 0, 0, n_elements);
 444
 445                 size_t elemsize = get_type_size_bytes(ir_element_type);
 446                 if (elemsize % align > 0) {
 447                         elemsize += align - (elemsize % align);
 448                 }
 449                 set_type_size_bytes(irtype, n_elements * elemsize);
 450         } else {
 451                 set_array_lower_bound_int(irtype, 0, 0);
 452         }
 453         set_type_state(irtype, layout_fixed);
 454
 455         return irtype;
 456 }
 457
 458 /**
 459  * Return the signed integer type of size bits.
 460  *
 461  * @param size   the size
 462  */
 463 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 464                                                  unsigned size,
 465                                                                                                  const type_t *type)
 466 {
 467         static ir_mode *s_modes[64 + 1] = {NULL, };
 468         ir_type *res;
 469         ir_mode *mode;
 470
 471         if (size <= 0 || size > 64)
 472                 return NULL;
 473
 474         mode = s_modes[size];
 475         if (mode == NULL) {
 476                 char name[32];
 477
 478                 snprintf(name, sizeof(name), "bf_I%u", size);
 479                 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
 480                 s_modes[size] = mode;
 481         }
 482
 483         type_dbg_info *dbgi = get_type_dbg_info_(type);
 484         res                 = new_d_type_primitive(mode, dbgi);
 485         set_primitive_base_type(res, base_tp);
 486
 487         return res;
 488 }
 489
 490 /**
 491  * Return the unsigned integer type of size bits.
 492  *
 493  * @param size   the size
 494  */
 495 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 496                                                    unsigned size,
 497                                                                                                    const type_t *type)
 498 {
 499         static ir_mode *u_modes[64 + 1] = {NULL, };
 500         ir_type *res;
 501         ir_mode *mode;
 502
 503         if (size <= 0 || size > 64)
 504                 return NULL;
 505
 506         mode = u_modes[size];
 507         if (mode == NULL) {
 508                 char name[32];
 509
 510                 snprintf(name, sizeof(name), "bf_U%u", size);
 511                 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
 512                 u_modes[size] = mode;
 513         }
 514
 515         type_dbg_info *dbgi = get_type_dbg_info_(type);
 516         res = new_d_type_primitive(mode, dbgi);
 517         set_primitive_base_type(res, base_tp);
 518
 519         return res;
 520 }
 521
 522 static ir_type *create_bitfield_type(const entity_t *entity)
 523 {
 524         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 525         type_t *base = skip_typeref(entity->declaration.type);
 526         assert(is_type_integer(base));
 527         ir_type *irbase = get_ir_type(base);
 528
 529         unsigned bit_size = entity->compound_member.bit_size;
 530
 531         if (is_type_signed(base)) {
 532                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 533         } else {
 534                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 535         }
 536 }
 537
 538 /**
 539  * Construct firm type from ast struct type.
 540  */
 541 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 542 {
 543         compound_t *compound = type->compound;
 544
 545         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 546                 return compound->irtype;
 547         }
 548
 549         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 550
 551         symbol_t *type_symbol = compound->base.symbol;
 552         ident    *id;
 553         if (type_symbol != NULL) {
 554                 id = new_id_from_str(type_symbol->string);
 555         } else {
 556                 if (is_union) {
 557                         id = id_unique("__anonymous_union.%u");
 558                 } else {
 559                         id = id_unique("__anonymous_struct.%u");
 560                 }
 561         }
 562
 563         ir_type *irtype;
 564         if (is_union) {
 565                 irtype = new_type_union(id);
 566         } else {
 567                 irtype = new_type_struct(id);
 568         }
 569
 570         compound->irtype_complete = false;
 571         compound->irtype          = irtype;
 572
 573         if (incomplete)
 574                 return irtype;
 575
 576         if (is_union) {
 577                 layout_union_type(type);
 578         } else {
 579                 layout_struct_type(type);
 580         }
 581
 582         compound->irtype_complete = true;
 583
 584         entity_t *entry = compound->members.entities;
 585         for ( ; entry != NULL; entry = entry->base.next) {
 586                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 587                         continue;
 588
 589                 symbol_t *symbol     = entry->base.symbol;
 590                 type_t   *entry_type = entry->declaration.type;
 591                 ident    *ident;
 592                 if (symbol == NULL) {
 593                         /* anonymous bitfield member, skip */
 594                         if (entry->compound_member.bitfield)
 595                                 continue;
 596                         assert(is_type_compound(entry_type));
 597                         ident = id_unique("anon.%u");
 598                 } else {
 599                         ident = new_id_from_str(symbol->string);
 600                 }
 601
 602                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 603
 604                 ir_type *entry_irtype;
 605                 if (entry->compound_member.bitfield) {
 606                         entry_irtype = create_bitfield_type(entry);
 607                 } else {
 608                         entry_irtype = get_ir_type(entry_type);
 609                 }
 610                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 611
 612                 set_entity_offset(entity, entry->compound_member.offset);
 613                 set_entity_offset_bits_remainder(entity,
 614                                                  entry->compound_member.bit_offset);
 615
 616                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 617                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 618                 entry->compound_member.entity = entity;
 619         }
 620
 621         set_type_alignment_bytes(irtype, compound->alignment);
 622         set_type_size_bytes(irtype, compound->size);
 623         set_type_state(irtype, layout_fixed);
 624
 625         return irtype;
 626 }
 627
 628 static ir_tarval *fold_constant_to_tarval(expression_t const *);
 629
 630 static void determine_enum_values(enum_type_t *const type)
 631 {
 632         ir_mode   *const mode    = atomic_modes[type->base.akind];
 633         ir_tarval *const one     = get_mode_one(mode);
 634         ir_tarval *      tv_next = get_mode_null(mode);
 635
 636         enum_t   *enume = type->enume;
 637         entity_t *entry = enume->base.next;
 638         for (; entry != NULL; entry = entry->base.next) {
 639                 if (entry->kind != ENTITY_ENUM_VALUE)
 640                         break;
 641
 642                 expression_t *const init = entry->enum_value.value;
 643                 if (init != NULL) {
 644                         tv_next = fold_constant_to_tarval(init);
 645                 }
 646                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 647                 entry->enum_value.tv = tv_next;
 648                 tv_next = tarval_add(tv_next, one);
 649         }
 650 }
 651
 652 static ir_type *create_enum_type(enum_type_t *const type)
 653 {
 654         return create_atomic_type(type->base.akind, (const type_t*) type);
 655 }
 656
 657 static ir_type *get_ir_type_incomplete(type_t *type)
 658 {
 659         type = skip_typeref(type);
 660
 661         if (type->base.firm_type != NULL) {
 662                 return type->base.firm_type;
 663         }
 664
 665         if (is_type_compound(type)) {
 666                 return create_compound_type(&type->compound, true);
 667         } else {
 668                 return get_ir_type(type);
 669         }
 670 }
 671
 672 ir_type *get_ir_type(type_t *type)
 673 {
 674         type = skip_typeref(type);
 675
 676         if (type->base.firm_type != NULL) {
 677                 return type->base.firm_type;
 678         }
 679
 680         ir_type *firm_type = NULL;
 681         switch (type->kind) {
 682         case TYPE_ATOMIC:
 683                 firm_type = create_atomic_type(type->atomic.akind, type);
 684                 break;
 685         case TYPE_COMPLEX:
 686                 firm_type = create_complex_type(&type->atomic);
 687                 break;
 688         case TYPE_IMAGINARY:
 689                 firm_type = create_imaginary_type(&type->atomic);
 690                 break;
 691         case TYPE_FUNCTION:
 692                 firm_type = create_method_type(&type->function, false);
 693                 break;
 694         case TYPE_POINTER:
 695                 firm_type = create_pointer_type(&type->pointer);
 696                 break;
 697         case TYPE_REFERENCE:
 698                 firm_type = create_reference_type(&type->reference);
 699                 break;
 700         case TYPE_ARRAY:
 701                 firm_type = create_array_type(&type->array);
 702                 break;
 703         case TYPE_COMPOUND_STRUCT:
 704         case TYPE_COMPOUND_UNION:
 705                 firm_type = create_compound_type(&type->compound, false);
 706                 break;
 707         case TYPE_ENUM:
 708                 firm_type = create_enum_type(&type->enumt);
 709                 break;
 710
 711         case TYPE_ERROR:
 712         case TYPE_TYPEOF:
 713         case TYPE_TYPEDEF:
 714                 break;
 715         }
 716         if (firm_type == NULL)
 717                 panic("unknown type found");
 718
 719         type->base.firm_type = firm_type;
 720         return firm_type;
 721 }
 722
 723 static ir_mode *get_ir_mode_storage(type_t *type)
 724 {
 725         type = skip_typeref(type);
 726
 727         /* Firm doesn't report a mode for arrays and structs/unions. */
 728         if (!is_type_scalar(type)) {
 729                 return mode_P_data;
 730         }
 731
 732         ir_type *const irtype = get_ir_type(type);
 733         ir_mode *const mode   = get_type_mode(irtype);
 734         assert(mode != NULL);
 735         return mode;
 736 }
 737
 738 /*
 739  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 740  * int that it returns bigger modes for floating point on some platforms
 741  * (x87 internally does arithemtic with 80bits)
 742  */
 743 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 744 {
 745         ir_mode *mode = get_ir_mode_storage(type);
 746         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 747                 return mode_float_arithmetic;
 748         }
 749
 750         return mode;
 751 }
 752
 753 /**
 754  * Return a node representing the size of a type.
 755  */
 756 static ir_node *get_type_size_node(type_t *type)
 757 {
 758         unsigned size;
 759         ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
 760         type = skip_typeref(type);
 761
 762         if (is_type_array(type) && type->array.is_vla) {
 763                 ir_node *size_node = get_vla_size(&type->array);
 764                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 765                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 766                 return real_size;
 767         }
 768
 769         size = get_type_size(type);
 770         return new_Const_long(mode, size);
 771 }
 772
 773 /** Names of the runtime functions. */
 774 static const struct {
 775         int        id;           /**< the rts id */
 776         int        n_res;        /**< number of return values */
 777         const char *name;        /**< the name of the rts function */
 778         int        n_params;     /**< number of parameters */
 779         unsigned   flags;        /**< language flags */
 780 } rts_data[] = {
 781         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 782         { rts_abort,      0, "abort",        0, _C89 },
 783         { rts_alloca,     1, "alloca",       1, _ALL },
 784         { rts_abs,        1, "abs",          1, _C89 },
 785         { rts_labs,       1, "labs",         1, _C89 },
 786         { rts_llabs,      1, "llabs",        1, _C99 },
 787         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 788
 789         { rts_fabs,       1, "fabs",         1, _C89 },
 790         { rts_sqrt,       1, "sqrt",         1, _C89 },
 791         { rts_cbrt,       1, "cbrt",         1, _C99 },
 792         { rts_exp,        1, "exp",          1, _C89 },
 793         { rts_exp2,       1, "exp2",         1, _C89 },
 794         { rts_exp10,      1, "exp10",        1, _GNUC },
 795         { rts_log,        1, "log",          1, _C89 },
 796         { rts_log2,       1, "log2",         1, _C89 },
 797         { rts_log10,      1, "log10",        1, _C89 },
 798         { rts_pow,        1, "pow",          2, _C89 },
 799         { rts_sin,        1, "sin",          1, _C89 },
 800         { rts_cos,        1, "cos",          1, _C89 },
 801         { rts_tan,        1, "tan",          1, _C89 },
 802         { rts_asin,       1, "asin",         1, _C89 },
 803         { rts_acos,       1, "acos",         1, _C89 },
 804         { rts_atan,       1, "atan",         1, _C89 },
 805         { rts_sinh,       1, "sinh",         1, _C89 },
 806         { rts_cosh,       1, "cosh",         1, _C89 },
 807         { rts_tanh,       1, "tanh",         1, _C89 },
 808
 809         { rts_fabsf,      1, "fabsf",        1, _C99 },
 810         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 811         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 812         { rts_expf,       1, "expf",         1, _C99 },
 813         { rts_exp2f,      1, "exp2f",        1, _C99 },
 814         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 815         { rts_logf,       1, "logf",         1, _C99 },
 816         { rts_log2f,      1, "log2f",        1, _C99 },
 817         { rts_log10f,     1, "log10f",       1, _C99 },
 818         { rts_powf,       1, "powf",         2, _C99 },
 819         { rts_sinf,       1, "sinf",         1, _C99 },
 820         { rts_cosf,       1, "cosf",         1, _C99 },
 821         { rts_tanf,       1, "tanf",         1, _C99 },
 822         { rts_asinf,      1, "asinf",        1, _C99 },
 823         { rts_acosf,      1, "acosf",        1, _C99 },
 824         { rts_atanf,      1, "atanf",        1, _C99 },
 825         { rts_sinhf,      1, "sinhf",        1, _C99 },
 826         { rts_coshf,      1, "coshf",        1, _C99 },
 827         { rts_tanhf,      1, "tanhf",        1, _C99 },
 828
 829         { rts_fabsl,      1, "fabsl",        1, _C99 },
 830         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 831         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 832         { rts_expl,       1, "expl",         1, _C99 },
 833         { rts_exp2l,      1, "exp2l",        1, _C99 },
 834         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 835         { rts_logl,       1, "logl",         1, _C99 },
 836         { rts_log2l,      1, "log2l",        1, _C99 },
 837         { rts_log10l,     1, "log10l",       1, _C99 },
 838         { rts_powl,       1, "powl",         2, _C99 },
 839         { rts_sinl,       1, "sinl",         1, _C99 },
 840         { rts_cosl,       1, "cosl",         1, _C99 },
 841         { rts_tanl,       1, "tanl",         1, _C99 },
 842         { rts_asinl,      1, "asinl",        1, _C99 },
 843         { rts_acosl,      1, "acosl",        1, _C99 },
 844         { rts_atanl,      1, "atanl",        1, _C99 },
 845         { rts_sinhl,      1, "sinhl",        1, _C99 },
 846         { rts_coshl,      1, "coshl",        1, _C99 },
 847         { rts_tanhl,      1, "tanhl",        1, _C99 },
 848
 849         { rts_strcmp,     1, "strcmp",       2, _C89 },
 850         { rts_strncmp,    1, "strncmp",      3, _C89 },
 851         { rts_strcpy,     1, "strcpy",       2, _C89 },
 852         { rts_strlen,     1, "strlen",       1, _C89 },
 853         { rts_memcpy,     1, "memcpy",       3, _C89 },
 854         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 855         { rts_memmove,    1, "memmove",      3, _C89 },
 856         { rts_memset,     1, "memset",       3, _C89 },
 857         { rts_memcmp,     1, "memcmp",       3, _C89 },
 858 };
 859
 860 static ident *rts_idents[lengthof(rts_data)];
 861
 862 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 863
 864 void set_create_ld_ident(ident *(*func)(entity_t*))
 865 {
 866         create_ld_ident = func;
 867 }
 868
 869 static bool declaration_is_definition(const entity_t *entity)
 870 {
 871         switch (entity->kind) {
 872         case ENTITY_VARIABLE:
 873                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 874         case ENTITY_FUNCTION:
 875                 return entity->function.body != NULL;
 876         case ENTITY_PARAMETER:
 877         case ENTITY_COMPOUND_MEMBER:
 878                 return false;
 879         case ENTITY_TYPEDEF:
 880         case ENTITY_ENUM:
 881         case ENTITY_ENUM_VALUE:
 882         case ENTITY_NAMESPACE:
 883         case ENTITY_LABEL:
 884         case ENTITY_LOCAL_LABEL:
 885                 break;
 886         }
 887         panic("declaration_is_definition called on non-declaration");
 888 }
 889
 890 /**
 891  * Handle GNU attributes for entities
 892  *
 893  * @param ent   the entity
 894  * @param decl  the routine declaration
 895  */
 896 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 897 {
 898         assert(is_declaration(entity));
 899         decl_modifiers_t modifiers = entity->declaration.modifiers;
 900
 901         if (is_method_entity(irentity)) {
 902                 if (modifiers & DM_PURE) {
 903                         set_entity_additional_properties(irentity, mtp_property_pure);
 904                 }
 905                 if (modifiers & DM_CONST) {
 906                         add_entity_additional_properties(irentity, mtp_property_const);
 907                 }
 908         }
 909         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 910                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 911         }
 912         if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 913             && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 914                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 915         }
 916 }
 917
 918 static bool is_main(entity_t *entity)
 919 {
 920         static symbol_t *sym_main = NULL;
 921         if (sym_main == NULL) {
 922                 sym_main = symbol_table_insert("main");
 923         }
 924
 925         if (entity->base.symbol != sym_main)
 926                 return false;
 927         /* must be in outermost scope */
 928         if (entity->base.parent_scope != &current_translation_unit->scope)
 929                 return false;
 930
 931         return true;
 932 }
 933
 934 /**
 935  * Creates an entity representing a function.
 936  *
 937  * @param entity       the function declaration/definition
 938  * @param owner_type   the owner type of this function, NULL
 939  *                     for global functions
 940  */
 941 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 942 {
 943         assert(entity->kind == ENTITY_FUNCTION);
 944         if (entity->function.irentity != NULL)
 945                 return entity->function.irentity;
 946
 947         switch (entity->function.btk) {
 948         case BUILTIN_NONE:
 949         case BUILTIN_LIBC:
 950         case BUILTIN_LIBC_CHECK:
 951                 break;
 952         default:
 953                 return NULL;
 954         }
 955
 956         symbol_t *symbol = entity->base.symbol;
 957         ident    *id     = new_id_from_str(symbol->string);
 958
 959         /* already an entity defined? */
 960         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 961         bool const has_body = entity->function.body != NULL;
 962         if (irentity != NULL) {
 963                 goto entity_created;
 964         }
 965
 966         ir_type *ir_type_method;
 967         if (entity->function.need_closure)
 968                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 969         else
 970                 ir_type_method = get_ir_type(entity->declaration.type);
 971
 972         bool nested_function = false;
 973         if (owner_type == NULL)
 974                 owner_type = get_glob_type();
 975         else
 976                 nested_function = true;
 977
 978         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 979         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 980
 981         ident *ld_id;
 982         if (nested_function)
 983                 ld_id = id_unique("inner.%u");
 984         else
 985                 ld_id = create_ld_ident(entity);
 986         set_entity_ld_ident(irentity, ld_id);
 987
 988         handle_decl_modifiers(irentity, entity);
 989
 990         if (! nested_function) {
 991                 storage_class_tag_t const storage_class
 992                         = (storage_class_tag_t) entity->declaration.storage_class;
 993                 if (storage_class == STORAGE_CLASS_STATIC) {
 994                     set_entity_visibility(irentity, ir_visibility_local);
 995                 } else {
 996                     set_entity_visibility(irentity, ir_visibility_external);
 997                 }
 998
 999                 bool const is_inline = entity->function.is_inline;
1000                 if (is_inline && has_body) {
1001                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1002                             || ((c_mode & _C99) == 0
1003                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1004                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1005                         }
1006                 }
1007         } else {
1008                 /* nested functions are always local */
1009                 set_entity_visibility(irentity, ir_visibility_local);
1010         }
1011
1012         /* We should check for file scope here, but as long as we compile C only
1013            this is not needed. */
1014         if (!freestanding && !has_body) {
1015                 /* check for a known runtime function */
1016                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1017                         if (id != rts_idents[i])
1018                                 continue;
1019
1020                         function_type_t *function_type
1021                                 = &entity->declaration.type->function;
1022                         /* rts_entities code can't handle a "wrong" number of parameters */
1023                         if (function_type->unspecified_parameters)
1024                                 continue;
1025
1026                         /* check number of parameters */
1027                         int n_params = count_parameters(function_type);
1028                         if (n_params != rts_data[i].n_params)
1029                                 continue;
1030
1031                         type_t *return_type = skip_typeref(function_type->return_type);
1032                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1033                         if (n_res != rts_data[i].n_res)
1034                                 continue;
1035
1036                         /* ignore those rts functions not necessary needed for current mode */
1037                         if ((c_mode & rts_data[i].flags) == 0)
1038                                 continue;
1039                         assert(rts_entities[rts_data[i].id] == NULL);
1040                         rts_entities[rts_data[i].id] = irentity;
1041                 }
1042         }
1043
1044         entitymap_insert(&entitymap, symbol, irentity);
1045
1046 entity_created:
1047         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1048         entity->function.irentity = irentity;
1049
1050         return irentity;
1051 }
1052
1053 /**
1054  * Creates a SymConst for a given entity.
1055  *
1056  * @param dbgi    debug info
1057  * @param entity  the entity
1058  */
1059 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1060 {
1061         assert(entity != NULL);
1062         union symconst_symbol sym;
1063         sym.entity_p = entity;
1064         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1065 }
1066
1067 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1068 {
1069         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1070 }
1071
1072 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1073                                    ir_mode *dest_mode)
1074 {
1075         if (is_Const(value)) {
1076                 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1077         }
1078
1079         ir_node *cond       = new_d_Cond(dbgi, value);
1080         ir_node *proj_true  = new_Proj(cond, mode_X, pn_Cond_true);
1081         ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1082         ir_node *tblock     = new_Block(1, &proj_true);
1083         ir_node *fblock     = new_Block(1, &proj_false);
1084         set_cur_block(tblock);
1085         ir_node *const1 = new_Const(get_mode_one(dest_mode));
1086         ir_node *tjump  = new_Jmp();
1087         set_cur_block(fblock);
1088         ir_node *const0 = new_Const(get_mode_null(dest_mode));
1089         ir_node *fjump  = new_Jmp();
1090
1091         ir_node *in[2]      = { tjump, fjump };
1092         ir_node *mergeblock = new_Block(2, in);
1093         set_cur_block(mergeblock);
1094         ir_node *phi_in[2]  = { const1, const0 };
1095         ir_node *phi        = new_Phi(2, phi_in, dest_mode);
1096         return phi;
1097 }
1098
1099 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1100 {
1101         ir_mode *value_mode = get_irn_mode(value);
1102
1103         if (value_mode == dest_mode)
1104                 return value;
1105
1106         if (dest_mode == mode_b) {
1107                 ir_node *zero = new_Const(get_mode_null(value_mode));
1108                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1109                 return cmp;
1110         } else if (value_mode == mode_b) {
1111                 return create_conv_from_b(dbgi, value, dest_mode);
1112         }
1113
1114         return new_d_Conv(dbgi, value, dest_mode);
1115 }
1116
1117 /**
1118  * Creates a SymConst node representing a string constant.
1119  *
1120  * @param src_pos    the source position of the string constant
1121  * @param id_prefix  a prefix for the name of the generated string constant
1122  * @param value      the value of the string constant
1123  */
1124 static ir_node *string_to_firm(source_position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1125 {
1126         size_t            const slen        = get_string_len(value) + 1;
1127         ir_initializer_t *const initializer = create_initializer_compound(slen);
1128         ir_type          *      elem_type;
1129         switch (value->encoding) {
1130         case STRING_ENCODING_CHAR: {
1131                 elem_type = ir_type_char;
1132
1133                 ir_mode *const mode = get_type_mode(elem_type);
1134                 char const    *p    = value->begin;
1135                 for (size_t i = 0; i < slen; ++i) {
1136                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1137                         ir_initializer_t *val = create_initializer_tarval(tv);
1138                         set_initializer_compound_value(initializer, i, val);
1139                 }
1140                 goto finish;
1141         }
1142
1143         case STRING_ENCODING_WIDE: {
1144                 elem_type = ir_type_wchar_t;
1145
1146                 ir_mode *const mode = get_type_mode(elem_type);
1147                 char const    *p    = value->begin;
1148                 for (size_t i = 0; i < slen; ++i) {
1149                         assert(p <= value->begin + value->size);
1150                         utf32             v   = read_utf8_char(&p);
1151                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1152                         ir_initializer_t *val = create_initializer_tarval(tv);
1153                         set_initializer_compound_value(initializer, i, val);
1154                 }
1155                 goto finish;
1156         }
1157         }
1158         panic("invalid string encoding");
1159
1160 finish:;
1161         ir_type *const type = new_type_array(1, elem_type);
1162         set_array_bounds_int(type, 0, 0, slen);
1163         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1164         set_type_state(      type, layout_fixed);
1165
1166         ir_type   *const global_type = get_glob_type();
1167         ident     *const id          = id_unique(id_prefix);
1168         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1169         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1170         set_entity_ld_ident(   entity, id);
1171         set_entity_visibility( entity, ir_visibility_private);
1172         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1173         set_entity_initializer(entity, initializer);
1174
1175         return create_symconst(dbgi, entity);
1176 }
1177
1178 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1179 {
1180         assert(type->kind == TYPE_ATOMIC);
1181         atomic_type_kind_t akind = type->atomic.akind;
1182
1183         ir_mode    *const mode = atomic_modes[akind];
1184         char const *const str  = literal->value.begin;
1185         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1186         if (tv == tarval_bad)
1187                 return false;
1188
1189         literal->base.type    = type;
1190         literal->target_value = tv;
1191         return true;
1192 }
1193
1194 void determine_literal_type(literal_expression_t *const literal)
1195 {
1196         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1197
1198         /* -1: signed only, 0: any, 1: unsigned only */
1199         int const sign =
1200                 !is_type_signed(literal->base.type) ? 1 :
1201                 literal->value.begin[0] == '0'      ? 0 :
1202                 -1; /* Decimal literals only try signed types. */
1203
1204         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1205         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1206
1207         if (try_create_integer(literal, literal->base.type))
1208                 goto finished;
1209
1210         /* now try if the constant is small enough for some types */
1211         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1212                 goto finished;
1213         if (sign <= 0 && try_create_integer(literal, type_long))
1214                 goto finished;
1215         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1216                 goto finished;
1217         /* last try? then we should not report tarval_bad */
1218         if (sign < 0)
1219                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1220         if (sign <= 0 && try_create_integer(literal, type_long_long))
1221                 goto finished;
1222
1223         /* last try */
1224         assert(sign >= 0);
1225         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1226         bool res = try_create_integer(literal, type_unsigned_long_long);
1227         if (!res)
1228                 panic("internal error when parsing number literal");
1229
1230 finished:
1231         tarval_set_integer_overflow_mode(old_mode);
1232 }
1233
1234 /**
1235  * Creates a Const node representing a constant.
1236  */
1237 static ir_node *literal_to_firm(const literal_expression_t *literal)
1238 {
1239         type_t     *type   = skip_typeref(literal->base.type);
1240         ir_mode    *mode   = get_ir_mode_storage(type);
1241         const char *string = literal->value.begin;
1242         size_t      size   = literal->value.size;
1243         ir_tarval  *tv;
1244
1245         switch (literal->base.kind) {
1246         case EXPR_LITERAL_INTEGER:
1247                 assert(literal->target_value != NULL);
1248                 tv = literal->target_value;
1249                 break;
1250
1251         case EXPR_LITERAL_FLOATINGPOINT:
1252                 tv = new_tarval_from_str(string, size, mode);
1253                 break;
1254
1255         case EXPR_LITERAL_BOOLEAN:
1256                 if (string[0] == 't') {
1257                         tv = get_mode_one(mode);
1258                 } else {
1259                         assert(string[0] == 'f');
1260         case EXPR_LITERAL_MS_NOOP:
1261                         tv = get_mode_null(mode);
1262                 }
1263                 break;
1264
1265         default:
1266                 panic("Invalid literal kind found");
1267         }
1268
1269         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1270         ir_node  *res        = new_d_Const(dbgi, tv);
1271         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1272         return create_conv(dbgi, res, mode_arith);
1273 }
1274
1275 /**
1276  * Creates a Const node representing a character constant.
1277  */
1278 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1279 {
1280         type_t     *type   = skip_typeref(literal->base.type);
1281         ir_mode    *mode   = get_ir_mode_storage(type);
1282         const char *string = literal->value.begin;
1283         size_t      size   = literal->value.size;
1284         ir_tarval  *tv;
1285
1286         switch (literal->value.encoding) {
1287         case STRING_ENCODING_WIDE: {
1288                 utf32  v = read_utf8_char(&string);
1289                 char   buf[128];
1290                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1291
1292                 tv = new_tarval_from_str(buf, len, mode);
1293                 break;
1294         }
1295
1296         case STRING_ENCODING_CHAR: {
1297                 long long int v;
1298                 bool char_is_signed
1299                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1300                 if (size == 1 && char_is_signed) {
1301                         v = (signed char)string[0];
1302                 } else {
1303                         v = 0;
1304                         for (size_t i = 0; i < size; ++i) {
1305                                 v = (v << 8) | ((unsigned char)string[i]);
1306                         }
1307                 }
1308                 char   buf[128];
1309                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1310
1311                 tv = new_tarval_from_str(buf, len, mode);
1312                 break;
1313         }
1314
1315         default:
1316                 panic("Invalid literal kind found");
1317         }
1318
1319         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1320         ir_node  *res        = new_d_Const(dbgi, tv);
1321         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1322         return create_conv(dbgi, res, mode_arith);
1323 }
1324
1325 /*
1326  * Allocate an area of size bytes aligned at alignment
1327  * at a frame type.
1328  */
1329 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1330 {
1331         static unsigned area_cnt = 0;
1332         char buf[32];
1333
1334         ir_type *tp = new_type_array(1, ir_type_char);
1335         set_array_bounds_int(tp, 0, 0, size);
1336         set_type_alignment_bytes(tp, alignment);
1337
1338         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1339         ident *name = new_id_from_str(buf);
1340         ir_entity *area = new_entity(frame_type, name, tp);
1341
1342         /* mark this entity as compiler generated */
1343         set_entity_compiler_generated(area, 1);
1344         return area;
1345 }
1346
1347 /**
1348  * Return a node representing a trampoline region
1349  * for a given function entity.
1350  *
1351  * @param dbgi    debug info
1352  * @param entity  the function entity
1353  */
1354 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1355 {
1356         ir_entity *region = NULL;
1357         int        i;
1358
1359         if (current_trampolines != NULL) {
1360                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1361                         if (current_trampolines[i].function == entity) {
1362                                 region = current_trampolines[i].region;
1363                                 break;
1364                         }
1365                 }
1366         } else {
1367                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1368         }
1369         ir_graph *irg = current_ir_graph;
1370         if (region == NULL) {
1371                 /* create a new region */
1372                 ir_type           *frame_tp = get_irg_frame_type(irg);
1373                 trampoline_region  reg;
1374                 reg.function = entity;
1375
1376                 reg.region   = alloc_trampoline(frame_tp,
1377                                                 be_params->trampoline_size,
1378                                                 be_params->trampoline_align);
1379                 ARR_APP1(trampoline_region, current_trampolines, reg);
1380                 region = reg.region;
1381         }
1382         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1383                                region);
1384 }
1385
1386 /**
1387  * Creates a trampoline for a function represented by an entity.
1388  *
1389  * @param dbgi    debug info
1390  * @param mode    the (reference) mode for the function address
1391  * @param entity  the function entity
1392  */
1393 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1394                                   ir_entity *entity)
1395 {
1396         assert(entity != NULL);
1397         ir_node *in[3];
1398         in[0] = get_trampoline_region(dbgi, entity);
1399         in[1] = create_symconst(dbgi, entity);
1400         in[2] = get_irg_frame(current_ir_graph);
1401
1402         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1403         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1404         return new_Proj(irn, mode, pn_Builtin_max+1);
1405 }
1406
1407 /**
1408  * Dereference an address.
1409  *
1410  * @param dbgi  debug info
1411  * @param type  the type of the dereferenced result (the points_to type)
1412  * @param addr  the address to dereference
1413  */
1414 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1415                                       ir_node *const addr)
1416 {
1417         type_t *skipped = skip_typeref(type);
1418         if (is_type_incomplete(skipped))
1419                 return addr;
1420
1421         ir_type *irtype = get_ir_type(skipped);
1422         if (is_compound_type(irtype)
1423             || is_Method_type(irtype)
1424             || is_Array_type(irtype)) {
1425                 return addr;
1426         }
1427
1428         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1429                                   ? cons_volatile : cons_none;
1430         ir_mode *const mode     = get_type_mode(irtype);
1431         ir_node *const memory   = get_store();
1432         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1433         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1434         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1435
1436         set_store(load_mem);
1437
1438         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1439         return create_conv(dbgi, load_res, mode_arithmetic);
1440 }
1441
1442 /**
1443  * Returns the correct base address depending on whether it is a parameter or a
1444  * normal local variable.
1445  */
1446 static ir_node *get_local_frame(ir_entity *const ent)
1447 {
1448         ir_graph      *const irg   = current_ir_graph;
1449         const ir_type *const owner = get_entity_owner(ent);
1450         if (owner == current_outer_frame) {
1451                 assert(current_static_link != NULL);
1452                 return current_static_link;
1453         } else {
1454                 return get_irg_frame(irg);
1455         }
1456 }
1457
1458 /**
1459  * Keep all memory edges of the given block.
1460  */
1461 static void keep_all_memory(ir_node *block)
1462 {
1463         ir_node *old = get_cur_block();
1464
1465         set_cur_block(block);
1466         keep_alive(get_store());
1467         /* TODO: keep all memory edges from restricted pointers */
1468         set_cur_block(old);
1469 }
1470
1471 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1472 {
1473         entity_t *entity = ref->entity;
1474         if (entity->enum_value.tv == NULL) {
1475                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1476                 assert(type->kind == TYPE_ENUM);
1477                 determine_enum_values(&type->enumt);
1478         }
1479
1480         return new_Const(entity->enum_value.tv);
1481 }
1482
1483 static ir_node *reference_addr(const reference_expression_t *ref)
1484 {
1485         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1486         entity_t *entity = ref->entity;
1487         assert(is_declaration(entity));
1488
1489         if (entity->kind == ENTITY_FUNCTION
1490             && entity->function.btk != BUILTIN_NONE) {
1491                 ir_entity *irentity = get_function_entity(entity, NULL);
1492                 /* for gcc compatibility we have to produce (dummy) addresses for some
1493                  * builtins which don't have entities */
1494                 if (irentity == NULL) {
1495                         source_position_t const *const pos = &ref->base.source_position;
1496                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1497
1498                         /* simply create a NULL pointer */
1499                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1500                         ir_node  *res  = new_Const(get_mode_null(mode));
1501
1502                         return res;
1503                 }
1504         }
1505
1506         switch((declaration_kind_t) entity->declaration.kind) {
1507         case DECLARATION_KIND_UNKNOWN:
1508                 break;
1509         case DECLARATION_KIND_PARAMETER:
1510         case DECLARATION_KIND_LOCAL_VARIABLE:
1511                 /* you can store to a local variable (so we don't panic but return NULL
1512                  * as an indicator for no real address) */
1513                 return NULL;
1514         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1515                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1516                 return addr;
1517         }
1518
1519         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1520         case DECLARATION_KIND_PARAMETER_ENTITY: {
1521                 ir_entity *irentity = entity->variable.v.entity;
1522                 ir_node   *frame    = get_local_frame(irentity);
1523                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524                 return sel;
1525         }
1526
1527         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1528                 return entity->variable.v.vla_base;
1529
1530         case DECLARATION_KIND_FUNCTION: {
1531                 return create_symconst(dbgi, entity->function.irentity);
1532         }
1533
1534         case DECLARATION_KIND_INNER_FUNCTION: {
1535                 type_t  *const type = skip_typeref(entity->declaration.type);
1536                 ir_mode *const mode = get_ir_mode_storage(type);
1537                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1538                         /* inner function not using the closure */
1539                         return create_symconst(dbgi, entity->function.irentity);
1540                 } else {
1541                         /* need trampoline here */
1542                         return create_trampoline(dbgi, mode, entity->function.irentity);
1543                 }
1544         }
1545
1546         case DECLARATION_KIND_COMPOUND_MEMBER:
1547                 panic("not implemented reference type");
1548         }
1549
1550         panic("reference to declaration with unknown type found");
1551 }
1552
1553 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1554 {
1555         dbg_info *const dbgi   = get_dbg_info(&ref->base.source_position);
1556         entity_t *const entity = ref->entity;
1557         assert(is_declaration(entity));
1558
1559         switch ((declaration_kind_t)entity->declaration.kind) {
1560         case DECLARATION_KIND_LOCAL_VARIABLE:
1561         case DECLARATION_KIND_PARAMETER: {
1562                 type_t  *const type  = skip_typeref(entity->declaration.type);
1563                 ir_mode *const mode  = get_ir_mode_storage(type);
1564                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1565                 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1566         }
1567
1568         default: {
1569                 ir_node *const addr = reference_addr(ref);
1570                 return deref_address(dbgi, entity->declaration.type, addr);
1571         }
1572         }
1573 }
1574
1575 /**
1576  * Transform calls to builtin functions.
1577  */
1578 static ir_node *process_builtin_call(const call_expression_t *call)
1579 {
1580         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1581
1582         assert(call->function->kind == EXPR_REFERENCE);
1583         reference_expression_t *builtin = &call->function->reference;
1584
1585         type_t *expr_type = skip_typeref(builtin->base.type);
1586         assert(is_type_pointer(expr_type));
1587
1588         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1589
1590         switch (builtin->entity->function.btk) {
1591         case BUILTIN_NONE:
1592                 break;
1593         case BUILTIN_ALLOCA: {
1594                 expression_t *argument = call->arguments->expression;
1595                 ir_node      *size     = expression_to_firm(argument);
1596
1597                 ir_node *store  = get_store();
1598                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1599                                               stack_alloc);
1600                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1601                 set_store(proj_m);
1602                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1603
1604                 return res;
1605         }
1606         case BUILTIN_INF: {
1607                 type_t    *type = function_type->function.return_type;
1608                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1609                 ir_tarval *tv   = get_mode_infinite(mode);
1610                 ir_node   *res  = new_d_Const(dbgi, tv);
1611                 return res;
1612         }
1613         case BUILTIN_NAN: {
1614                 /* Ignore string for now... */
1615                 assert(is_type_function(function_type));
1616                 type_t    *type = function_type->function.return_type;
1617                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1618                 ir_tarval *tv   = get_mode_NAN(mode);
1619                 ir_node   *res  = new_d_Const(dbgi, tv);
1620                 return res;
1621         }
1622         case BUILTIN_EXPECT: {
1623                 expression_t *argument = call->arguments->expression;
1624                 return _expression_to_firm(argument);
1625         }
1626         case BUILTIN_VA_END:
1627                 /* evaluate the argument of va_end for its side effects */
1628                 _expression_to_firm(call->arguments->expression);
1629                 return NULL;
1630         case BUILTIN_OBJECT_SIZE: {
1631                 /* determine value of "type" */
1632                 expression_t *type_expression = call->arguments->next->expression;
1633                 long          type_val        = fold_constant_to_int(type_expression);
1634                 type_t       *type            = function_type->function.return_type;
1635                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1636                 /* just produce a "I don't know" result */
1637                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1638                                                 get_mode_minus_one(mode);
1639
1640                 return new_d_Const(dbgi, result);
1641         }
1642         case BUILTIN_ROTL: {
1643                 ir_node *val  = expression_to_firm(call->arguments->expression);
1644                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1645                 ir_mode *mode = get_irn_mode(val);
1646                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1647                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1648         }
1649         case BUILTIN_ROTR: {
1650                 ir_node *val  = expression_to_firm(call->arguments->expression);
1651                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1652                 ir_mode *mode = get_irn_mode(val);
1653                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1654                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1655                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1656                 return new_d_Rotl(dbgi, val, sub, mode);
1657         }
1658         case BUILTIN_FIRM:
1659                 break;
1660         case BUILTIN_LIBC:
1661         case BUILTIN_LIBC_CHECK:
1662                 panic("builtin did not produce an entity");
1663         }
1664         panic("invalid builtin found");
1665 }
1666
1667 /**
1668  * Transform a call expression.
1669  * Handles some special cases, like alloca() calls, which must be resolved
1670  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1671  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1672  * handled right...
1673  */
1674 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1675 {
1676         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1677         assert(currently_reachable());
1678
1679         expression_t   *function = call->function;
1680         ir_node        *callee   = NULL;
1681         bool            firm_builtin = false;
1682         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1683         if (function->kind == EXPR_REFERENCE) {
1684                 const reference_expression_t *ref    = &function->reference;
1685                 entity_t                     *entity = ref->entity;
1686
1687                 if (entity->kind == ENTITY_FUNCTION) {
1688                         builtin_kind_t builtin = entity->function.btk;
1689                         if (builtin == BUILTIN_FIRM) {
1690                                 firm_builtin = true;
1691                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1692                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1693                                    && builtin != BUILTIN_LIBC_CHECK) {
1694                                 return process_builtin_call(call);
1695                         }
1696                 }
1697         }
1698         if (!firm_builtin)
1699                 callee = expression_to_firm(function);
1700
1701         type_t *type = skip_typeref(function->base.type);
1702         assert(is_type_pointer(type));
1703         pointer_type_t *pointer_type = &type->pointer;
1704         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1705         assert(is_type_function(points_to));
1706         function_type_t *function_type = &points_to->function;
1707
1708         int      n_parameters    = 0;
1709         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1710         ir_type *new_method_type = NULL;
1711         if (function_type->variadic || function_type->unspecified_parameters) {
1712                 const call_argument_t *argument = call->arguments;
1713                 for ( ; argument != NULL; argument = argument->next) {
1714                         ++n_parameters;
1715                 }
1716
1717                 /* we need to construct a new method type matching the call
1718                  * arguments... */
1719                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1720                 int n_res       = get_method_n_ress(ir_method_type);
1721                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1722                 set_method_calling_convention(new_method_type,
1723                                get_method_calling_convention(ir_method_type));
1724                 set_method_additional_properties(new_method_type,
1725                                get_method_additional_properties(ir_method_type));
1726                 set_method_variadicity(new_method_type,
1727                                        get_method_variadicity(ir_method_type));
1728
1729                 for (int i = 0; i < n_res; ++i) {
1730                         set_method_res_type(new_method_type, i,
1731                                             get_method_res_type(ir_method_type, i));
1732                 }
1733                 argument = call->arguments;
1734                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1735                         expression_t *expression = argument->expression;
1736                         ir_type      *irtype     = get_ir_type(expression->base.type);
1737                         set_method_param_type(new_method_type, i, irtype);
1738                 }
1739                 ir_method_type = new_method_type;
1740         } else {
1741                 n_parameters = get_method_n_params(ir_method_type);
1742         }
1743
1744         ir_node *in[n_parameters];
1745
1746         const call_argument_t *argument = call->arguments;
1747         for (int n = 0; n < n_parameters; ++n) {
1748                 expression_t *expression = argument->expression;
1749                 ir_node      *arg_node   = expression_to_firm(expression);
1750
1751                 type_t *arg_type = skip_typeref(expression->base.type);
1752                 if (!is_type_compound(arg_type)) {
1753                         ir_mode *const mode = get_ir_mode_storage(arg_type);
1754                         arg_node = create_conv(dbgi, arg_node, mode);
1755                 }
1756
1757                 in[n] = arg_node;
1758
1759                 argument = argument->next;
1760         }
1761
1762         ir_node *store;
1763         if (function_type->modifiers & DM_CONST) {
1764                 store = get_irg_no_mem(current_ir_graph);
1765         } else {
1766                 store = get_store();
1767         }
1768
1769         ir_node *node;
1770         type_t  *return_type = skip_typeref(function_type->return_type);
1771         ir_node *result      = NULL;
1772         if (firm_builtin) {
1773                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1774                                      ir_method_type);
1775                 if (! (function_type->modifiers & DM_CONST)) {
1776                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1777                         set_store(mem);
1778                 }
1779
1780                 if (!is_type_void(return_type)) {
1781                         assert(is_type_scalar(return_type));
1782                         ir_mode *mode = get_ir_mode_storage(return_type);
1783                         result = new_Proj(node, mode, pn_Builtin_max+1);
1784                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1785                         result              = create_conv(NULL, result, mode_arith);
1786                 }
1787         } else {
1788                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1789                 if (! (function_type->modifiers & DM_CONST)) {
1790                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1791                         set_store(mem);
1792                 }
1793
1794                 if (!is_type_void(return_type)) {
1795                         ir_node *const resproj    = new_Proj(node, mode_T, pn_Call_T_result);
1796                         ir_mode *const mode       = get_ir_mode_storage(return_type);
1797                         result                    = new_Proj(resproj, mode, 0);
1798                         ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1799                         result                    = create_conv(NULL, result, mode_arith);
1800                 }
1801         }
1802
1803         if (function_type->modifiers & DM_NORETURN) {
1804                 /* A dead end:  Keep the Call and the Block.  Also place all further
1805                  * nodes into a new and unreachable block. */
1806                 keep_alive(node);
1807                 keep_alive(get_cur_block());
1808                 ir_node *block = new_Block(0, NULL);
1809                 set_cur_block(block);
1810         }
1811
1812         return result;
1813 }
1814
1815 static ir_node *statement_to_firm(statement_t *statement);
1816 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1817
1818 static ir_node *expression_to_addr(const expression_t *expression);
1819 static ir_node *create_condition_evaluation(const expression_t *expression,
1820                                             ir_node *true_block,
1821                                             ir_node *false_block);
1822
1823 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1824                          ir_node *value)
1825 {
1826         if (!is_type_compound(type)) {
1827                 ir_mode *mode = get_ir_mode_storage(type);
1828                 value         = create_conv(dbgi, value, mode);
1829         }
1830
1831         ir_node *memory = get_store();
1832
1833         if (is_type_scalar(type)) {
1834                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1835                                       ? cons_volatile : cons_none;
1836                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1837                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1838                 set_store(store_mem);
1839         } else {
1840                 ir_type *irtype    = get_ir_type(type);
1841                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1842                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1843                 set_store(copyb_mem);
1844         }
1845 }
1846
1847 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1848 {
1849         ir_tarval *all_one   = get_mode_all_one(mode);
1850         int        mode_size = get_mode_size_bits(mode);
1851         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1852
1853         assert(offset >= 0);
1854         assert(size   >= 0);
1855         assert(offset + size <= mode_size);
1856         if (size == mode_size) {
1857                 return all_one;
1858         }
1859
1860         long       shiftr    = get_mode_size_bits(mode) - size;
1861         long       shiftl    = offset;
1862         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1863         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1864         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1865         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1866
1867         return mask1;
1868 }
1869
1870 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1871                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1872                 bool need_return)
1873 {
1874         ir_type *entity_type = get_entity_type(entity);
1875         ir_type *base_type   = get_primitive_base_type(entity_type);
1876         ir_mode *mode        = get_type_mode(base_type);
1877         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1878
1879         value = create_conv(dbgi, value, mode);
1880
1881         /* kill upper bits of value and shift to right position */
1882         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1883         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1884         unsigned  base_bits  = get_mode_size_bits(mode);
1885         unsigned  shiftwidth = base_bits - bitsize;
1886
1887         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1888         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1889
1890         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1891         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1892         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1893
1894         /* load current value */
1895         ir_node   *mem             = get_store();
1896         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1897                                           set_volatile ? cons_volatile : cons_none);
1898         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1899         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1900         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1901         ir_tarval *inv_mask        = tarval_not(shift_mask);
1902         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1903         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1904
1905         /* construct new value and store */
1906         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1907         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1908                                          set_volatile ? cons_volatile : cons_none);
1909         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1910         set_store(store_mem);
1911
1912         if (!need_return)
1913                 return NULL;
1914
1915         ir_node *res_shr;
1916         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1917         if (mode_is_signed(mode)) {
1918                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1919         } else {
1920                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1921         }
1922         return res_shr;
1923 }
1924
1925 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1926                                          ir_node *addr)
1927 {
1928         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
1929         entity_t *entity    = expression->compound_entry;
1930         type_t   *base_type = entity->declaration.type;
1931         ir_mode  *mode      = get_ir_mode_storage(base_type);
1932         ir_node  *mem       = get_store();
1933         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1934         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1935         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1936         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1937
1938         ir_mode  *amode     = mode;
1939         /* optimisation, since shifting in modes < machine_size is usually
1940          * less efficient */
1941         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1942                 amode = mode_uint;
1943         }
1944         unsigned amode_size = get_mode_size_bits(amode);
1945         load_res = create_conv(dbgi, load_res, amode);
1946
1947         set_store(load_mem);
1948
1949         /* kill upper bits */
1950         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1951         unsigned   bitoffset   = entity->compound_member.bit_offset;
1952         unsigned   bitsize     = entity->compound_member.bit_size;
1953         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1954         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1955         ir_node   *countl      = new_d_Const(dbgi, tvl);
1956         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1957
1958         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1959         assert(shift_bitsr <= amode_size);
1960         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1961         ir_node   *countr      = new_d_Const(dbgi, tvr);
1962         ir_node   *shiftr;
1963         if (mode_is_signed(mode)) {
1964                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1965         } else {
1966                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1967         }
1968
1969         type_t  *type    = expression->base.type;
1970         ir_mode *resmode = get_ir_mode_arithmetic(type);
1971         return create_conv(dbgi, shiftr, resmode);
1972 }
1973
1974 /* make sure the selected compound type is constructed */
1975 static void construct_select_compound(const select_expression_t *expression)
1976 {
1977         type_t *type = skip_typeref(expression->compound->base.type);
1978         if (is_type_pointer(type)) {
1979                 type = type->pointer.points_to;
1980         }
1981         (void) get_ir_type(type);
1982 }
1983
1984 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1985                                               ir_node *value, ir_node *addr)
1986 {
1987         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1988         type_t   *type = skip_typeref(expression->base.type);
1989
1990         if (!is_type_compound(type)) {
1991                 ir_mode  *mode = get_ir_mode_storage(type);
1992                 value          = create_conv(dbgi, value, mode);
1993         }
1994
1995         if (expression->kind == EXPR_REFERENCE) {
1996                 const reference_expression_t *ref = &expression->reference;
1997
1998                 entity_t *entity = ref->entity;
1999                 assert(is_declaration(entity));
2000                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2001                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2002                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2003                         set_value(entity->variable.v.value_number, value);
2004                         return value;
2005                 }
2006         }
2007
2008         if (addr == NULL)
2009                 addr = expression_to_addr(expression);
2010         assert(addr != NULL);
2011
2012         if (expression->kind == EXPR_SELECT) {
2013                 const select_expression_t *select = &expression->select;
2014
2015                 construct_select_compound(select);
2016
2017                 entity_t *entity = select->compound_entry;
2018                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2019                 if (entity->compound_member.bitfield) {
2020                         ir_entity *irentity = entity->compound_member.entity;
2021                         bool       set_volatile
2022                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2023                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2024                                                        set_volatile, true);
2025                         return value;
2026                 }
2027         }
2028
2029         assign_value(dbgi, addr, type, value);
2030         return value;
2031 }
2032
2033 static void set_value_for_expression(const expression_t *expression,
2034                                      ir_node *value)
2035 {
2036         set_value_for_expression_addr(expression, value, NULL);
2037 }
2038
2039 static ir_node *get_value_from_lvalue(const expression_t *expression,
2040                                       ir_node *addr)
2041 {
2042         if (expression->kind == EXPR_REFERENCE) {
2043                 const reference_expression_t *ref = &expression->reference;
2044
2045                 entity_t *entity = ref->entity;
2046                 assert(entity->kind == ENTITY_VARIABLE
2047                                 || entity->kind == ENTITY_PARAMETER);
2048                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2049                 int value_number;
2050                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2051                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2052                         value_number = entity->variable.v.value_number;
2053                         assert(addr == NULL);
2054                         type_t  *type = skip_typeref(expression->base.type);
2055                         ir_mode *mode = get_ir_mode_storage(type);
2056                         ir_node *res  = get_value(value_number, mode);
2057                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2058                 }
2059         }
2060
2061         assert(addr != NULL);
2062         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2063
2064         ir_node *value;
2065         if (expression->kind == EXPR_SELECT &&
2066             expression->select.compound_entry->compound_member.bitfield) {
2067             construct_select_compound(&expression->select);
2068                 value = bitfield_extract_to_firm(&expression->select, addr);
2069         } else {
2070                 value = deref_address(dbgi, expression->base.type, addr);
2071         }
2072
2073         return value;
2074 }
2075
2076
2077 static ir_node *create_incdec(const unary_expression_t *expression)
2078 {
2079         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2080         const expression_t *value_expr = expression->value;
2081         ir_node            *addr       = expression_to_addr(value_expr);
2082         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2083
2084         type_t  *type = skip_typeref(expression->base.type);
2085         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2086
2087         ir_node *offset;
2088         if (is_type_pointer(type)) {
2089                 pointer_type_t *pointer_type = &type->pointer;
2090                 offset = get_type_size_node(pointer_type->points_to);
2091         } else {
2092                 assert(is_type_arithmetic(type));
2093                 offset = new_Const(get_mode_one(mode));
2094         }
2095
2096         ir_node *result;
2097         ir_node *store_value;
2098         switch(expression->base.kind) {
2099         case EXPR_UNARY_POSTFIX_INCREMENT:
2100                 result      = value;
2101                 store_value = new_d_Add(dbgi, value, offset, mode);
2102                 break;
2103         case EXPR_UNARY_POSTFIX_DECREMENT:
2104                 result      = value;
2105                 store_value = new_d_Sub(dbgi, value, offset, mode);
2106                 break;
2107         case EXPR_UNARY_PREFIX_INCREMENT:
2108                 result      = new_d_Add(dbgi, value, offset, mode);
2109                 store_value = result;
2110                 break;
2111         case EXPR_UNARY_PREFIX_DECREMENT:
2112                 result      = new_d_Sub(dbgi, value, offset, mode);
2113                 store_value = result;
2114                 break;
2115         default:
2116                 panic("no incdec expr in create_incdec");
2117         }
2118
2119         set_value_for_expression_addr(value_expr, store_value, addr);
2120
2121         return result;
2122 }
2123
2124 static bool is_local_variable(expression_t *expression)
2125 {
2126         if (expression->kind != EXPR_REFERENCE)
2127                 return false;
2128         reference_expression_t *ref_expr = &expression->reference;
2129         entity_t               *entity   = ref_expr->entity;
2130         if (entity->kind != ENTITY_VARIABLE)
2131                 return false;
2132         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2133         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2134 }
2135
2136 static ir_relation get_relation(const expression_kind_t kind)
2137 {
2138         switch(kind) {
2139         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2140         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2141         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2142         case EXPR_BINARY_ISLESS:
2143         case EXPR_BINARY_LESS:          return ir_relation_less;
2144         case EXPR_BINARY_ISLESSEQUAL:
2145         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2146         case EXPR_BINARY_ISGREATER:
2147         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2148         case EXPR_BINARY_ISGREATEREQUAL:
2149         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2150         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2151
2152         default:
2153                 break;
2154         }
2155         panic("trying to get ir_relation from non-comparison binexpr type");
2156 }
2157
2158 /**
2159  * Handle the assume optimizer hint: check if a Confirm
2160  * node can be created.
2161  *
2162  * @param dbi    debug info
2163  * @param expr   the IL assume expression
2164  *
2165  * we support here only some simple cases:
2166  *  - var rel const
2167  *  - const rel val
2168  *  - var rel var
2169  */
2170 static ir_node *handle_assume_compare(dbg_info *dbi,
2171                                       const binary_expression_t *expression)
2172 {
2173         expression_t *op1 = expression->left;
2174         expression_t *op2 = expression->right;
2175         entity_t     *var2, *var = NULL;
2176         ir_node      *res      = NULL;
2177         ir_relation   relation = get_relation(expression->base.kind);
2178
2179         if (is_local_variable(op1) && is_local_variable(op2)) {
2180                 var  = op1->reference.entity;
2181             var2 = op2->reference.entity;
2182
2183                 type_t  *const type = skip_typeref(var->declaration.type);
2184                 ir_mode *const mode = get_ir_mode_storage(type);
2185
2186                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2187                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2188
2189                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2190                 set_value(var2->variable.v.value_number, res);
2191
2192                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2193                 set_value(var->variable.v.value_number, res);
2194
2195                 return res;
2196         }
2197
2198         expression_t *con = NULL;
2199         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2200                 var = op1->reference.entity;
2201                 con = op2;
2202         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2203                 relation = get_inversed_relation(relation);
2204                 var = op2->reference.entity;
2205                 con = op1;
2206         }
2207
2208         if (var != NULL) {
2209                 type_t  *const type = skip_typeref(var->declaration.type);
2210                 ir_mode *const mode = get_ir_mode_storage(type);
2211
2212                 res = get_value(var->variable.v.value_number, mode);
2213                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2214                 set_value(var->variable.v.value_number, res);
2215         }
2216         return res;
2217 }
2218
2219 /**
2220  * Handle the assume optimizer hint.
2221  *
2222  * @param dbi    debug info
2223  * @param expr   the IL assume expression
2224  */
2225 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2226 {
2227         switch(expression->kind) {
2228         case EXPR_BINARY_EQUAL:
2229         case EXPR_BINARY_NOTEQUAL:
2230         case EXPR_BINARY_LESS:
2231         case EXPR_BINARY_LESSEQUAL:
2232         case EXPR_BINARY_GREATER:
2233         case EXPR_BINARY_GREATEREQUAL:
2234                 return handle_assume_compare(dbi, &expression->binary);
2235         default:
2236                 return NULL;
2237         }
2238 }
2239
2240 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2241                             type_t *from_type, type_t *type)
2242 {
2243         type = skip_typeref(type);
2244         if (is_type_void(type)) {
2245                 /* make sure firm type is constructed */
2246                 (void) get_ir_type(type);
2247                 return NULL;
2248         }
2249         if (!is_type_scalar(type)) {
2250                 /* make sure firm type is constructed */
2251                 (void) get_ir_type(type);
2252                 return value_node;
2253         }
2254
2255         from_type     = skip_typeref(from_type);
2256         ir_mode *mode = get_ir_mode_storage(type);
2257         /* check for conversion from / to __based types */
2258         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2259                 const variable_t *from_var = from_type->pointer.base_variable;
2260                 const variable_t *to_var   = type->pointer.base_variable;
2261                 if (from_var != to_var) {
2262                         if (from_var != NULL) {
2263                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2264                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2265                                 value_node = new_d_Add(dbgi, value_node, base, mode);
2266                         }
2267                         if (to_var != NULL) {
2268                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2269                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2270                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2271                         }
2272                 }
2273         }
2274
2275         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2276                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2277                  * convert to mode_b so we only get a 0/1 value */
2278                 value_node = create_conv(dbgi, value_node, mode_b);
2279         }
2280
2281         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2282         ir_node *node       = create_conv(dbgi, value_node, mode);
2283         node                = create_conv(dbgi, node, mode_arith);
2284
2285         return node;
2286 }
2287
2288 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2289 {
2290         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2291         type_t   *type = skip_typeref(expression->base.type);
2292
2293         const expression_t *value = expression->value;
2294
2295         switch(expression->base.kind) {
2296         case EXPR_UNARY_TAKE_ADDRESS:
2297                 return expression_to_addr(value);
2298
2299         case EXPR_UNARY_NEGATE: {
2300                 ir_node *value_node = expression_to_firm(value);
2301                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2302                 return new_d_Minus(dbgi, value_node, mode);
2303         }
2304         case EXPR_UNARY_PLUS:
2305                 return expression_to_firm(value);
2306         case EXPR_UNARY_BITWISE_NEGATE: {
2307                 ir_node *value_node = expression_to_firm(value);
2308                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2309                 return new_d_Not(dbgi, value_node, mode);
2310         }
2311         case EXPR_UNARY_NOT: {
2312                 ir_node *value_node = _expression_to_firm(value);
2313                 value_node          = create_conv(dbgi, value_node, mode_b);
2314                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2315                 return res;
2316         }
2317         case EXPR_UNARY_DEREFERENCE: {
2318                 ir_node *value_node = expression_to_firm(value);
2319                 type_t  *value_type = skip_typeref(value->base.type);
2320                 assert(is_type_pointer(value_type));
2321
2322                 /* check for __based */
2323                 const variable_t *const base_var = value_type->pointer.base_variable;
2324                 if (base_var != NULL) {
2325                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2326                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2327                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2328                 }
2329                 type_t  *points_to  = value_type->pointer.points_to;
2330                 return deref_address(dbgi, points_to, value_node);
2331         }
2332         case EXPR_UNARY_POSTFIX_INCREMENT:
2333         case EXPR_UNARY_POSTFIX_DECREMENT:
2334         case EXPR_UNARY_PREFIX_INCREMENT:
2335         case EXPR_UNARY_PREFIX_DECREMENT:
2336                 return create_incdec(expression);
2337         case EXPR_UNARY_CAST: {
2338                 ir_node *value_node = expression_to_firm(value);
2339                 type_t  *from_type  = value->base.type;
2340                 return create_cast(dbgi, value_node, from_type, type);
2341         }
2342         case EXPR_UNARY_ASSUME:
2343                 return handle_assume(dbgi, value);
2344
2345         default:
2346                 break;
2347         }
2348         panic("invalid UNEXPR type found");
2349 }
2350
2351 /**
2352  * produces a 0/1 depending of the value of a mode_b node
2353  */
2354 static ir_node *produce_condition_result(const expression_t *expression,
2355                                          ir_mode *mode, dbg_info *dbgi)
2356 {
2357         ir_node *const one_block  = new_immBlock();
2358         ir_node *const zero_block = new_immBlock();
2359         create_condition_evaluation(expression, one_block, zero_block);
2360         mature_immBlock(one_block);
2361         mature_immBlock(zero_block);
2362
2363         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2364         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2365         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2366         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2367         set_cur_block(block);
2368
2369         ir_node *const one   = new_Const(get_mode_one(mode));
2370         ir_node *const zero  = new_Const(get_mode_null(mode));
2371         ir_node *const in[2] = { one, zero };
2372         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2373
2374         return val;
2375 }
2376
2377 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2378                 ir_node *value, type_t *type)
2379 {
2380         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2381         assert(is_type_pointer(type));
2382         pointer_type_t *const pointer_type = &type->pointer;
2383         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2384         ir_node        *      elem_size    = get_type_size_node(points_to);
2385         elem_size                          = create_conv(dbgi, elem_size, mode);
2386         value                              = create_conv(dbgi, value,     mode);
2387         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2388         return mul;
2389 }
2390
2391 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2392                           ir_node *left, ir_node *right)
2393 {
2394         ir_mode  *mode;
2395         type_t   *type_left  = skip_typeref(expression->left->base.type);
2396         type_t   *type_right = skip_typeref(expression->right->base.type);
2397
2398         expression_kind_t kind = expression->base.kind;
2399
2400         switch (kind) {
2401         case EXPR_BINARY_SHIFTLEFT:
2402         case EXPR_BINARY_SHIFTRIGHT:
2403         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2404         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2405                 mode  = get_ir_mode_arithmetic(expression->base.type);
2406                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2407                 break;
2408
2409         case EXPR_BINARY_SUB:
2410                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2411                         const pointer_type_t *const ptr_type = &type_left->pointer;
2412
2413                         mode = get_ir_mode_arithmetic(expression->base.type);
2414                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2415                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2416                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2417                         ir_node *const no_mem    = new_NoMem();
2418                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2419                                                                                                    mode, op_pin_state_floats);
2420                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2421                 }
2422                 /* fallthrough */
2423         case EXPR_BINARY_SUB_ASSIGN:
2424                 if (is_type_pointer(type_left)) {
2425                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2426                         mode  = get_ir_mode_arithmetic(type_left);
2427                         break;
2428                 }
2429                 goto normal_node;
2430
2431         case EXPR_BINARY_ADD:
2432         case EXPR_BINARY_ADD_ASSIGN:
2433                 if (is_type_pointer(type_left)) {
2434                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2435                         mode  = get_ir_mode_arithmetic(type_left);
2436                         break;
2437                 } else if (is_type_pointer(type_right)) {
2438                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2439                         mode  = get_ir_mode_arithmetic(type_right);
2440                         break;
2441                 }
2442                 goto normal_node;
2443
2444         default:
2445 normal_node:
2446                 mode = get_ir_mode_arithmetic(type_right);
2447                 left = create_conv(dbgi, left, mode);
2448                 break;
2449         }
2450
2451         switch (kind) {
2452         case EXPR_BINARY_ADD_ASSIGN:
2453         case EXPR_BINARY_ADD:
2454                 return new_d_Add(dbgi, left, right, mode);
2455         case EXPR_BINARY_SUB_ASSIGN:
2456         case EXPR_BINARY_SUB:
2457                 return new_d_Sub(dbgi, left, right, mode);
2458         case EXPR_BINARY_MUL_ASSIGN:
2459         case EXPR_BINARY_MUL:
2460                 return new_d_Mul(dbgi, left, right, mode);
2461         case EXPR_BINARY_BITWISE_AND:
2462         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2463                 return new_d_And(dbgi, left, right, mode);
2464         case EXPR_BINARY_BITWISE_OR:
2465         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2466                 return new_d_Or(dbgi, left, right, mode);
2467         case EXPR_BINARY_BITWISE_XOR:
2468         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2469                 return new_d_Eor(dbgi, left, right, mode);
2470         case EXPR_BINARY_SHIFTLEFT:
2471         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2472                 return new_d_Shl(dbgi, left, right, mode);
2473         case EXPR_BINARY_SHIFTRIGHT:
2474         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2475                 if (mode_is_signed(mode)) {
2476                         return new_d_Shrs(dbgi, left, right, mode);
2477                 } else {
2478                         return new_d_Shr(dbgi, left, right, mode);
2479                 }
2480         case EXPR_BINARY_DIV:
2481         case EXPR_BINARY_DIV_ASSIGN: {
2482                 ir_node *pin = new_Pin(new_NoMem());
2483                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2484                                          op_pin_state_floats);
2485                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2486                 return res;
2487         }
2488         case EXPR_BINARY_MOD:
2489         case EXPR_BINARY_MOD_ASSIGN: {
2490                 ir_node *pin = new_Pin(new_NoMem());
2491                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2492                                          op_pin_state_floats);
2493                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2494                 return res;
2495         }
2496         default:
2497                 panic("unexpected expression kind");
2498         }
2499 }
2500
2501 static ir_node *create_lazy_op(const binary_expression_t *expression)
2502 {
2503         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2504         type_t   *type = skip_typeref(expression->base.type);
2505         ir_mode  *mode = get_ir_mode_arithmetic(type);
2506
2507         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2508                 bool val = fold_constant_to_bool(expression->left);
2509                 expression_kind_t ekind = expression->base.kind;
2510                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2511                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2512                         if (!val) {
2513                                 return new_Const(get_mode_null(mode));
2514                         }
2515                 } else {
2516                         if (val) {
2517                                 return new_Const(get_mode_one(mode));
2518                         }
2519                 }
2520
2521                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2522                         bool valr = fold_constant_to_bool(expression->right);
2523                         return create_Const_from_bool(mode, valr);
2524                 }
2525
2526                 return produce_condition_result(expression->right, mode, dbgi);
2527         }
2528
2529         return produce_condition_result((const expression_t*) expression, mode,
2530                                         dbgi);
2531 }
2532
2533 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2534                                             ir_node *right, ir_mode *mode);
2535
2536 static ir_node *create_assign_binop(const binary_expression_t *expression)
2537 {
2538         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2539         const expression_t *left_expr = expression->left;
2540         type_t             *type      = skip_typeref(left_expr->base.type);
2541         ir_node            *right     = expression_to_firm(expression->right);
2542         ir_node            *left_addr = expression_to_addr(left_expr);
2543         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2544         ir_node            *result    = create_op(dbgi, expression, left, right);
2545
2546         result = create_cast(dbgi, result, expression->right->base.type, type);
2547
2548         result = set_value_for_expression_addr(left_expr, result, left_addr);
2549
2550         if (!is_type_compound(type)) {
2551                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2552                 result = create_conv(dbgi, result, mode_arithmetic);
2553         }
2554         return result;
2555 }
2556
2557 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2558 {
2559         expression_kind_t kind = expression->base.kind;
2560
2561         switch(kind) {
2562         case EXPR_BINARY_EQUAL:
2563         case EXPR_BINARY_NOTEQUAL:
2564         case EXPR_BINARY_LESS:
2565         case EXPR_BINARY_LESSEQUAL:
2566         case EXPR_BINARY_GREATER:
2567         case EXPR_BINARY_GREATEREQUAL:
2568         case EXPR_BINARY_ISGREATER:
2569         case EXPR_BINARY_ISGREATEREQUAL:
2570         case EXPR_BINARY_ISLESS:
2571         case EXPR_BINARY_ISLESSEQUAL:
2572         case EXPR_BINARY_ISLESSGREATER:
2573         case EXPR_BINARY_ISUNORDERED: {
2574                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2575                 ir_node    *left     = expression_to_firm(expression->left);
2576                 ir_node    *right    = expression_to_firm(expression->right);
2577                 ir_relation relation = get_relation(kind);
2578                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2579                 return cmp;
2580         }
2581         case EXPR_BINARY_ASSIGN: {
2582                 ir_node *addr  = expression_to_addr(expression->left);
2583                 ir_node *right = expression_to_firm(expression->right);
2584                 ir_node *res
2585                         = set_value_for_expression_addr(expression->left, right, addr);
2586
2587                 type_t  *type            = skip_typeref(expression->base.type);
2588                 if (!is_type_compound(type)) {
2589                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2590                         res                      = create_conv(NULL, res, mode_arithmetic);
2591                 }
2592                 return res;
2593         }
2594         case EXPR_BINARY_ADD:
2595         case EXPR_BINARY_SUB:
2596         case EXPR_BINARY_MUL:
2597         case EXPR_BINARY_DIV:
2598         case EXPR_BINARY_MOD:
2599         case EXPR_BINARY_BITWISE_AND:
2600         case EXPR_BINARY_BITWISE_OR:
2601         case EXPR_BINARY_BITWISE_XOR:
2602         case EXPR_BINARY_SHIFTLEFT:
2603         case EXPR_BINARY_SHIFTRIGHT:
2604         {
2605                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2606                 ir_node  *left  = expression_to_firm(expression->left);
2607                 ir_node  *right = expression_to_firm(expression->right);
2608                 return create_op(dbgi, expression, left, right);
2609         }
2610         case EXPR_BINARY_LOGICAL_AND:
2611         case EXPR_BINARY_LOGICAL_OR:
2612                 return create_lazy_op(expression);
2613         case EXPR_BINARY_COMMA:
2614                 /* create side effects of left side */
2615                 (void) expression_to_firm(expression->left);
2616                 return _expression_to_firm(expression->right);
2617
2618         case EXPR_BINARY_ADD_ASSIGN:
2619         case EXPR_BINARY_SUB_ASSIGN:
2620         case EXPR_BINARY_MUL_ASSIGN:
2621         case EXPR_BINARY_MOD_ASSIGN:
2622         case EXPR_BINARY_DIV_ASSIGN:
2623         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2624         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2625         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2626         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2627         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2628                 return create_assign_binop(expression);
2629         default:
2630                 panic("invalid binexpr type");
2631         }
2632 }
2633
2634 static ir_node *array_access_addr(const array_access_expression_t *expression)
2635 {
2636         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2637         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2638         ir_node  *offset      = expression_to_firm(expression->index);
2639         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2640         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2641         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2642
2643         return result;
2644 }
2645
2646 static ir_node *array_access_to_firm(
2647                 const array_access_expression_t *expression)
2648 {
2649         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2650         ir_node  *addr   = array_access_addr(expression);
2651         type_t   *type   = revert_automatic_type_conversion(
2652                         (const expression_t*) expression);
2653         type             = skip_typeref(type);
2654
2655         return deref_address(dbgi, type, addr);
2656 }
2657
2658 static long get_offsetof_offset(const offsetof_expression_t *expression)
2659 {
2660         type_t *orig_type = expression->type;
2661         long    offset    = 0;
2662
2663         designator_t *designator = expression->designator;
2664         for ( ; designator != NULL; designator = designator->next) {
2665                 type_t *type = skip_typeref(orig_type);
2666                 /* be sure the type is constructed */
2667                 (void) get_ir_type(type);
2668
2669                 if (designator->symbol != NULL) {
2670                         assert(is_type_compound(type));
2671                         symbol_t *symbol = designator->symbol;
2672
2673                         compound_t *compound = type->compound.compound;
2674                         entity_t   *iter     = compound->members.entities;
2675                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2676
2677                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2678                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2679                         offset += get_entity_offset(iter->compound_member.entity);
2680
2681                         orig_type = iter->declaration.type;
2682                 } else {
2683                         expression_t *array_index = designator->array_index;
2684                         assert(designator->array_index != NULL);
2685                         assert(is_type_array(type));
2686
2687                         long index         = fold_constant_to_int(array_index);
2688                         ir_type *arr_type  = get_ir_type(type);
2689                         ir_type *elem_type = get_array_element_type(arr_type);
2690                         long     elem_size = get_type_size_bytes(elem_type);
2691
2692                         offset += index * elem_size;
2693
2694                         orig_type = type->array.element_type;
2695                 }
2696         }
2697
2698         return offset;
2699 }
2700
2701 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2702 {
2703         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2704         long       offset = get_offsetof_offset(expression);
2705         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2706         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2707
2708         return new_d_Const(dbgi, tv);
2709 }
2710
2711 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2712                                      ir_entity *entity, type_t *type);
2713 static ir_initializer_t *create_ir_initializer(
2714                 const initializer_t *initializer, type_t *type);
2715
2716 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2717                                             initializer_t *initializer,
2718                                             type_t *type)
2719 {
2720         /* create the ir_initializer */
2721         PUSH_IRG(get_const_code_irg());
2722         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2723         POP_IRG();
2724
2725         ident     *const id          = id_unique("initializer.%u");
2726         ir_type   *const irtype      = get_ir_type(type);
2727         ir_type   *const global_type = get_glob_type();
2728         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2729         set_entity_ld_ident(entity, id);
2730         set_entity_visibility(entity, ir_visibility_private);
2731         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2732         set_entity_initializer(entity, irinitializer);
2733         return entity;
2734 }
2735
2736 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2737 {
2738         dbg_info      *dbgi        = get_dbg_info(&expression->base.source_position);
2739         type_t        *type        = expression->type;
2740         initializer_t *initializer = expression->initializer;
2741
2742         if (is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT) {
2743                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2744                 return create_symconst(dbgi, entity);
2745         } else {
2746                 /* create an entity on the stack */
2747                 ident   *const id     = id_unique("CompLit.%u");
2748                 ir_type *const irtype = get_ir_type(type);
2749                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2750
2751                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2752                 set_entity_ld_ident(entity, id);
2753
2754                 /* create initialisation code */
2755                 create_local_initializer(initializer, dbgi, entity, type);
2756
2757                 /* create a sel for the compound literal address */
2758                 ir_node *frame = get_irg_frame(current_ir_graph);
2759                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2760                 return sel;
2761         }
2762 }
2763
2764 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2765 {
2766         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2767         type_t   *const type = expr->type;
2768         ir_node  *const addr = compound_literal_addr(expr);
2769         return deref_address(dbgi, type, addr);
2770 }
2771
2772 /**
2773  * Transform a sizeof expression into Firm code.
2774  */
2775 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2776 {
2777         type_t *const type = skip_typeref(expression->type);
2778         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2779         if (is_type_array(type) && type->array.is_vla
2780                         && expression->tp_expression != NULL) {
2781                 expression_to_firm(expression->tp_expression);
2782         }
2783
2784         return get_type_size_node(type);
2785 }
2786
2787 static entity_t *get_expression_entity(const expression_t *expression)
2788 {
2789         if (expression->kind != EXPR_REFERENCE)
2790                 return NULL;
2791
2792         return expression->reference.entity;
2793 }
2794
2795 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2796 {
2797         switch(entity->kind) {
2798         case DECLARATION_KIND_CASES:
2799                 return entity->declaration.alignment;
2800         case ENTITY_STRUCT:
2801         case ENTITY_UNION:
2802                 return entity->compound.alignment;
2803         case ENTITY_TYPEDEF:
2804                 return entity->typedefe.alignment;
2805         default:
2806                 break;
2807         }
2808         return 0;
2809 }
2810
2811 /**
2812  * Transform an alignof expression into Firm code.
2813  */
2814 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2815 {
2816         unsigned alignment = 0;
2817
2818         const expression_t *tp_expression = expression->tp_expression;
2819         if (tp_expression != NULL) {
2820                 entity_t *entity = get_expression_entity(tp_expression);
2821                 if (entity != NULL) {
2822                         alignment = get_cparser_entity_alignment(entity);
2823                 }
2824         }
2825
2826         if (alignment == 0) {
2827                 type_t *type = expression->type;
2828                 alignment = get_type_alignment(type);
2829         }
2830
2831         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2832         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2833         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2834         return new_d_Const(dbgi, tv);
2835 }
2836
2837 static void init_ir_types(void);
2838
2839 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2840 {
2841         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2842
2843         bool constant_folding_old = constant_folding;
2844         constant_folding = true;
2845         int old_optimize         = get_optimize();
2846         int old_constant_folding = get_opt_constant_folding();
2847         set_optimize(1);
2848         set_opt_constant_folding(1);
2849
2850         init_ir_types();
2851
2852         PUSH_IRG(get_const_code_irg());
2853         ir_node *const cnst = _expression_to_firm(expression);
2854         POP_IRG();
2855
2856         set_optimize(old_optimize);
2857         set_opt_constant_folding(old_constant_folding);
2858
2859         if (!is_Const(cnst)) {
2860                 panic("couldn't fold constant");
2861         }
2862
2863         constant_folding = constant_folding_old;
2864
2865         ir_tarval *const tv   = get_Const_tarval(cnst);
2866         ir_mode   *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2867         return tarval_convert_to(tv, mode);
2868 }
2869
2870 /* this function is only used in parser.c, but it relies on libfirm functionality */
2871 bool constant_is_negative(const expression_t *expression)
2872 {
2873         ir_tarval *tv = fold_constant_to_tarval(expression);
2874         return tarval_is_negative(tv);
2875 }
2876
2877 long fold_constant_to_int(const expression_t *expression)
2878 {
2879         ir_tarval *tv = fold_constant_to_tarval(expression);
2880         if (!tarval_is_long(tv)) {
2881                 panic("result of constant folding is not integer");
2882         }
2883
2884         return get_tarval_long(tv);
2885 }
2886
2887 bool fold_constant_to_bool(const expression_t *expression)
2888 {
2889         ir_tarval *tv = fold_constant_to_tarval(expression);
2890         return !tarval_is_null(tv);
2891 }
2892
2893 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2894 {
2895         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2896
2897         /* first try to fold a constant condition */
2898         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2899                 bool val = fold_constant_to_bool(expression->condition);
2900                 if (val) {
2901                         expression_t *true_expression = expression->true_expression;
2902                         if (true_expression == NULL)
2903                                 true_expression = expression->condition;
2904                         return expression_to_firm(true_expression);
2905                 } else {
2906                         return expression_to_firm(expression->false_expression);
2907                 }
2908         }
2909
2910         ir_node *const true_block  = new_immBlock();
2911         ir_node *const false_block = new_immBlock();
2912         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
2913         mature_immBlock(true_block);
2914         mature_immBlock(false_block);
2915
2916         set_cur_block(true_block);
2917         ir_node *true_val;
2918         if (expression->true_expression != NULL) {
2919                 true_val = expression_to_firm(expression->true_expression);
2920         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2921                 true_val = cond_expr;
2922         } else {
2923                 /* Condition ended with a short circuit (&&, ||, !) operation or a
2924                  * comparison.  Generate a "1" as value for the true branch. */
2925                 true_val = new_Const(get_mode_one(mode_Is));
2926         }
2927         ir_node *const true_jmp = new_d_Jmp(dbgi);
2928
2929         set_cur_block(false_block);
2930         ir_node *const false_val = expression_to_firm(expression->false_expression);
2931         ir_node *const false_jmp = new_d_Jmp(dbgi);
2932
2933         /* create the common block */
2934         ir_node *const in_cf[2] = { true_jmp, false_jmp };
2935         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2936         set_cur_block(block);
2937
2938         /* TODO improve static semantics, so either both or no values are NULL */
2939         if (true_val == NULL || false_val == NULL)
2940                 return NULL;
2941
2942         ir_node *const in[2] = { true_val, false_val };
2943         type_t  *const type  = skip_typeref(expression->base.type);
2944         ir_mode *const mode  = get_ir_mode_arithmetic(type);
2945         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2946
2947         return val;
2948 }
2949
2950 /**
2951  * Returns an IR-node representing the address of a field.
2952  */
2953 static ir_node *select_addr(const select_expression_t *expression)
2954 {
2955         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2956
2957         construct_select_compound(expression);
2958
2959         ir_node *compound_addr = expression_to_firm(expression->compound);
2960
2961         entity_t *entry = expression->compound_entry;
2962         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2963         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2964
2965         if (constant_folding) {
2966                 ir_mode *mode      = get_irn_mode(compound_addr);
2967                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2968                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2969                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2970         } else {
2971                 ir_entity *irentity = entry->compound_member.entity;
2972                 assert(irentity != NULL);
2973                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2974         }
2975 }
2976
2977 static ir_node *select_to_firm(const select_expression_t *expression)
2978 {
2979         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2980         ir_node  *addr = select_addr(expression);
2981         type_t   *type = revert_automatic_type_conversion(
2982                         (const expression_t*) expression);
2983         type           = skip_typeref(type);
2984
2985         entity_t *entry = expression->compound_entry;
2986         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2987
2988         if (entry->compound_member.bitfield) {
2989                 return bitfield_extract_to_firm(expression, addr);
2990         }
2991
2992         return deref_address(dbgi, type, addr);
2993 }
2994
2995 /* Values returned by __builtin_classify_type. */
2996 typedef enum gcc_type_class
2997 {
2998         no_type_class = -1,
2999         void_type_class,
3000         integer_type_class,
3001         char_type_class,
3002         enumeral_type_class,
3003         boolean_type_class,
3004         pointer_type_class,
3005         reference_type_class,
3006         offset_type_class,
3007         real_type_class,
3008         complex_type_class,
3009         function_type_class,
3010         method_type_class,
3011         record_type_class,
3012         union_type_class,
3013         array_type_class,
3014         string_type_class,
3015         set_type_class,
3016         file_type_class,
3017         lang_type_class
3018 } gcc_type_class;
3019
3020 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3021 {
3022         type_t *type = expr->type_expression->base.type;
3023
3024         /* FIXME gcc returns different values depending on whether compiling C or C++
3025          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3026         gcc_type_class tc;
3027         for (;;) {
3028                 type = skip_typeref(type);
3029                 switch (type->kind) {
3030                         case TYPE_ATOMIC: {
3031                                 const atomic_type_t *const atomic_type = &type->atomic;
3032                                 switch (atomic_type->akind) {
3033                                         /* gcc cannot do that */
3034                                         case ATOMIC_TYPE_VOID:
3035                                                 tc = void_type_class;
3036                                                 goto make_const;
3037
3038                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3039                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3040                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3041                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3042                                         case ATOMIC_TYPE_SHORT:
3043                                         case ATOMIC_TYPE_USHORT:
3044                                         case ATOMIC_TYPE_INT:
3045                                         case ATOMIC_TYPE_UINT:
3046                                         case ATOMIC_TYPE_LONG:
3047                                         case ATOMIC_TYPE_ULONG:
3048                                         case ATOMIC_TYPE_LONGLONG:
3049                                         case ATOMIC_TYPE_ULONGLONG:
3050                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3051                                                 tc = integer_type_class;
3052                                                 goto make_const;
3053
3054                                         case ATOMIC_TYPE_FLOAT:
3055                                         case ATOMIC_TYPE_DOUBLE:
3056                                         case ATOMIC_TYPE_LONG_DOUBLE:
3057                                                 tc = real_type_class;
3058                                                 goto make_const;
3059                                 }
3060                                 panic("Unexpected atomic type in classify_type_to_firm().");
3061                         }
3062
3063                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3064                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3065                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3066                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3067                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3068                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3069                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3070
3071                         /* gcc handles this as integer */
3072                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3073
3074                         /* gcc classifies the referenced type */
3075                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3076
3077                         /* typedef/typeof should be skipped already */
3078                         case TYPE_TYPEDEF:
3079                         case TYPE_TYPEOF:
3080                         case TYPE_ERROR:
3081                                 break;
3082                 }
3083                 panic("unexpected TYPE classify_type_to_firm().");
3084         }
3085
3086 make_const:;
3087         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3088         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3089         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3090         return new_d_Const(dbgi, tv);
3091 }
3092
3093 static ir_node *function_name_to_firm(
3094                 const funcname_expression_t *const expr)
3095 {
3096         switch(expr->kind) {
3097         case FUNCNAME_FUNCTION:
3098         case FUNCNAME_PRETTY_FUNCTION:
3099         case FUNCNAME_FUNCDNAME:
3100                 if (current_function_name == NULL) {
3101                         source_position_t const *const src_pos = &expr->base.source_position;
3102                         char              const *const name    = current_function_entity->base.symbol->string;
3103                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3104                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3105                 }
3106                 return current_function_name;
3107         case FUNCNAME_FUNCSIG:
3108                 if (current_funcsig == NULL) {
3109                         source_position_t const *const src_pos = &expr->base.source_position;
3110                         ir_entity               *const ent     = get_irg_entity(current_ir_graph);
3111                         char              const *const name    = get_entity_ld_name(ent);
3112                         string_t                 const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3113                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3114                 }
3115                 return current_funcsig;
3116         }
3117         panic("Unsupported function name");
3118 }
3119
3120 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3121 {
3122         statement_t *statement = expr->statement;
3123
3124         assert(statement->kind == STATEMENT_COMPOUND);
3125         return compound_statement_to_firm(&statement->compound);
3126 }
3127
3128 static ir_node *va_start_expression_to_firm(
3129         const va_start_expression_t *const expr)
3130 {
3131         ir_entity *param_ent = current_vararg_entity;
3132         if (param_ent == NULL) {
3133                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3134                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3135                 ir_type *const param_type  = get_unknown_type();
3136                 param_ent = new_parameter_entity(frame_type, n, param_type);
3137                 current_vararg_entity = param_ent;
3138         }
3139
3140         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3141         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3142         ir_node  *const no_mem  = new_NoMem();
3143         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3144
3145         set_value_for_expression(expr->ap, arg_sel);
3146
3147         return NULL;
3148 }
3149
3150 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3151 {
3152         type_t       *const type    = expr->base.type;
3153         expression_t *const ap_expr = expr->ap;
3154         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3155         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3156         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3157         ir_node      *const res     = deref_address(dbgi, type, ap);
3158
3159         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3160         ir_mode      *const mode    = get_irn_mode(cnst);
3161         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3162         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3163         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3164         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3165         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3166
3167         set_value_for_expression_addr(ap_expr, add, ap_addr);
3168
3169         return res;
3170 }
3171
3172 /**
3173  * Generate Firm for a va_copy expression.
3174  */
3175 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3176 {
3177         ir_node *const src = expression_to_firm(expr->src);
3178         set_value_for_expression(expr->dst, src);
3179         return NULL;
3180 }
3181
3182 static ir_node *dereference_addr(const unary_expression_t *const expression)
3183 {
3184         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3185         return expression_to_firm(expression->value);
3186 }
3187
3188 /**
3189  * Returns a IR-node representing an lvalue of the given expression.
3190  */
3191 static ir_node *expression_to_addr(const expression_t *expression)
3192 {
3193         switch(expression->kind) {
3194         case EXPR_ARRAY_ACCESS:
3195                 return array_access_addr(&expression->array_access);
3196         case EXPR_CALL:
3197                 return call_expression_to_firm(&expression->call);
3198         case EXPR_COMPOUND_LITERAL:
3199                 return compound_literal_addr(&expression->compound_literal);
3200         case EXPR_REFERENCE:
3201                 return reference_addr(&expression->reference);
3202         case EXPR_SELECT:
3203                 return select_addr(&expression->select);
3204         case EXPR_UNARY_DEREFERENCE:
3205                 return dereference_addr(&expression->unary);
3206         default:
3207                 break;
3208         }
3209         panic("trying to get address of non-lvalue");
3210 }
3211
3212 static ir_node *builtin_constant_to_firm(
3213                 const builtin_constant_expression_t *expression)
3214 {
3215         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3216         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3217         return create_Const_from_bool(mode, v);
3218 }
3219
3220 static ir_node *builtin_types_compatible_to_firm(
3221                 const builtin_types_compatible_expression_t *expression)
3222 {
3223         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3224         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3225         bool     const value = types_compatible(left, right);
3226         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3227         return create_Const_from_bool(mode, value);
3228 }
3229
3230 static ir_node *get_label_block(label_t *label)
3231 {
3232         if (label->block != NULL)
3233                 return label->block;
3234
3235         ir_node *block = new_immBlock();
3236         label->block = block;
3237
3238         ARR_APP1(label_t *, all_labels, label);
3239         return block;
3240 }
3241
3242 /**
3243  * Pointer to a label.  This is used for the
3244  * GNU address-of-label extension.
3245  */
3246 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3247 {
3248         /* Beware: Might be called from create initializer with current_ir_graph
3249          * set to const_code_irg. */
3250         PUSH_IRG(current_function);
3251         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3252         ir_node   *block  = get_label_block(label->label);
3253         ir_entity *entity = create_Block_entity(block);
3254         POP_IRG();
3255
3256         symconst_symbol value;
3257         value.entity_p = entity;
3258         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3259 }
3260
3261 /**
3262  * creates firm nodes for an expression. The difference between this function
3263  * and expression_to_firm is, that this version might produce mode_b nodes
3264  * instead of mode_Is.
3265  */
3266 static ir_node *_expression_to_firm(expression_t const *const expr)
3267 {
3268 #ifndef NDEBUG
3269         if (!constant_folding) {
3270                 assert(!expr->base.transformed);
3271                 ((expression_t*)expr)->base.transformed = true;
3272         }
3273 #endif
3274
3275         switch (expr->kind) {
3276         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3277         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3278         case EXPR_BINARY_CASES:               return binary_expression_to_firm(       &expr->binary);
3279         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3280         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3281         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3282         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3283         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3284         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3285         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3286         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3287         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3288         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3289         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3290         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3291         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3292         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3293         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3294         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3295         case EXPR_UNARY_CASES:                return unary_expression_to_firm(        &expr->unary);
3296         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3297         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3298         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3299
3300         case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.source_position, "str.%u", &expr->string_literal.value);
3301
3302         case EXPR_ERROR: break;
3303         }
3304         panic("invalid expression found");
3305 }
3306
3307 /**
3308  * Check if a given expression is a GNU __builtin_expect() call.
3309  */
3310 static bool is_builtin_expect(const expression_t *expression)
3311 {
3312         if (expression->kind != EXPR_CALL)
3313                 return false;
3314
3315         expression_t *function = expression->call.function;
3316         if (function->kind != EXPR_REFERENCE)
3317                 return false;
3318         reference_expression_t *ref = &function->reference;
3319         if (ref->entity->kind         != ENTITY_FUNCTION ||
3320             ref->entity->function.btk != BUILTIN_EXPECT)
3321                 return false;
3322
3323         return true;
3324 }
3325
3326 static bool produces_mode_b(const expression_t *expression)
3327 {
3328         switch (expression->kind) {
3329         case EXPR_BINARY_EQUAL:
3330         case EXPR_BINARY_NOTEQUAL:
3331         case EXPR_BINARY_LESS:
3332         case EXPR_BINARY_LESSEQUAL:
3333         case EXPR_BINARY_GREATER:
3334         case EXPR_BINARY_GREATEREQUAL:
3335         case EXPR_BINARY_ISGREATER:
3336         case EXPR_BINARY_ISGREATEREQUAL:
3337         case EXPR_BINARY_ISLESS:
3338         case EXPR_BINARY_ISLESSEQUAL:
3339         case EXPR_BINARY_ISLESSGREATER:
3340         case EXPR_BINARY_ISUNORDERED:
3341         case EXPR_UNARY_NOT:
3342                 return true;
3343
3344         case EXPR_CALL:
3345                 if (is_builtin_expect(expression)) {
3346                         expression_t *argument = expression->call.arguments->expression;
3347                         return produces_mode_b(argument);
3348                 }
3349                 return false;
3350         case EXPR_BINARY_COMMA:
3351                 return produces_mode_b(expression->binary.right);
3352
3353         default:
3354                 return false;
3355         }
3356 }
3357
3358 static ir_node *expression_to_firm(const expression_t *expression)
3359 {
3360         if (!produces_mode_b(expression)) {
3361                 ir_node *res = _expression_to_firm(expression);
3362                 assert(res == NULL || get_irn_mode(res) != mode_b);
3363                 return res;
3364         }
3365
3366         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3367                 return new_Const(fold_constant_to_tarval(expression));
3368         }
3369
3370         /* we have to produce a 0/1 from the mode_b expression */
3371         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3372         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3373         return produce_condition_result(expression, mode, dbgi);
3374 }
3375
3376 /**
3377  * create a short-circuit expression evaluation that tries to construct
3378  * efficient control flow structures for &&, || and ! expressions
3379  */
3380 static ir_node *create_condition_evaluation(const expression_t *expression,
3381                                             ir_node *true_block,
3382                                             ir_node *false_block)
3383 {
3384         switch(expression->kind) {
3385         case EXPR_UNARY_NOT: {
3386                 const unary_expression_t *unary_expression = &expression->unary;
3387                 create_condition_evaluation(unary_expression->value, false_block,
3388                                             true_block);
3389                 return NULL;
3390         }
3391         case EXPR_BINARY_LOGICAL_AND: {
3392                 const binary_expression_t *binary_expression = &expression->binary;
3393
3394                 ir_node *extra_block = new_immBlock();
3395                 create_condition_evaluation(binary_expression->left, extra_block,
3396                                             false_block);
3397                 mature_immBlock(extra_block);
3398                 set_cur_block(extra_block);
3399                 create_condition_evaluation(binary_expression->right, true_block,
3400                                             false_block);
3401                 return NULL;
3402         }
3403         case EXPR_BINARY_LOGICAL_OR: {
3404                 const binary_expression_t *binary_expression = &expression->binary;
3405
3406                 ir_node *extra_block = new_immBlock();
3407                 create_condition_evaluation(binary_expression->left, true_block,
3408                                             extra_block);
3409                 mature_immBlock(extra_block);
3410                 set_cur_block(extra_block);
3411                 create_condition_evaluation(binary_expression->right, true_block,
3412                                             false_block);
3413                 return NULL;
3414         }
3415         default:
3416                 break;
3417         }
3418
3419         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3420         ir_node  *cond_expr  = _expression_to_firm(expression);
3421         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3422         ir_node  *cond       = new_d_Cond(dbgi, condition);
3423         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3424         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3425
3426         /* set branch prediction info based on __builtin_expect */
3427         if (is_builtin_expect(expression) && is_Cond(cond)) {
3428                 call_argument_t *argument = expression->call.arguments->next;
3429                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3430                         bool               const cnst = fold_constant_to_bool(argument->expression);
3431                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3432                         set_Cond_jmp_pred(cond, pred);
3433                 }
3434         }
3435
3436         add_immBlock_pred(true_block, true_proj);
3437         add_immBlock_pred(false_block, false_proj);
3438
3439         set_unreachable_now();
3440         return cond_expr;
3441 }
3442
3443 static void create_variable_entity(entity_t *variable,
3444                                    declaration_kind_t declaration_kind,
3445                                    ir_type *parent_type)
3446 {
3447         assert(variable->kind == ENTITY_VARIABLE);
3448         type_t    *type = skip_typeref(variable->declaration.type);
3449
3450         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3451         ir_type   *const irtype    = get_ir_type(type);
3452         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3453         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3454         unsigned         alignment = variable->declaration.alignment;
3455
3456         set_entity_alignment(irentity, alignment);
3457
3458         handle_decl_modifiers(irentity, variable);
3459
3460         variable->declaration.kind  = (unsigned char) declaration_kind;
3461         variable->variable.v.entity = irentity;
3462         set_entity_ld_ident(irentity, create_ld_ident(variable));
3463
3464         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3465                 set_entity_volatility(irentity, volatility_is_volatile);
3466         }
3467 }
3468
3469
3470 typedef struct type_path_entry_t type_path_entry_t;
3471 struct type_path_entry_t {
3472         type_t           *type;
3473         ir_initializer_t *initializer;
3474         size_t            index;
3475         entity_t         *compound_entry;
3476 };
3477
3478 typedef struct type_path_t type_path_t;
3479 struct type_path_t {
3480         type_path_entry_t *path;
3481         type_t            *top_type;
3482         bool               invalid;
3483 };
3484
3485 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3486 {
3487         size_t len = ARR_LEN(path->path);
3488
3489         for (size_t i = 0; i < len; ++i) {
3490                 const type_path_entry_t *entry = & path->path[i];
3491
3492                 type_t *type = skip_typeref(entry->type);
3493                 if (is_type_compound(type)) {
3494                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3495                 } else if (is_type_array(type)) {
3496                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3497                 } else {
3498                         fprintf(stderr, "-INVALID-");
3499                 }
3500         }
3501         fprintf(stderr, "  (");
3502         print_type(path->top_type);
3503         fprintf(stderr, ")");
3504 }
3505
3506 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3507 {
3508         size_t len = ARR_LEN(path->path);
3509         assert(len > 0);
3510         return & path->path[len-1];
3511 }
3512
3513 static type_path_entry_t *append_to_type_path(type_path_t *path)
3514 {
3515         size_t len = ARR_LEN(path->path);
3516         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3517
3518         type_path_entry_t *result = & path->path[len];
3519         memset(result, 0, sizeof(result[0]));
3520         return result;
3521 }
3522
3523 static size_t get_compound_member_count(const compound_type_t *type)
3524 {
3525         compound_t *compound  = type->compound;
3526         size_t      n_members = 0;
3527         entity_t   *member    = compound->members.entities;
3528         for ( ; member != NULL; member = member->base.next) {
3529                 ++n_members;
3530         }
3531
3532         return n_members;
3533 }
3534
3535 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3536 {
3537         type_t *orig_top_type = path->top_type;
3538         type_t *top_type      = skip_typeref(orig_top_type);
3539
3540         assert(is_type_compound(top_type) || is_type_array(top_type));
3541
3542         if (ARR_LEN(path->path) == 0) {
3543                 return NULL;
3544         } else {
3545                 type_path_entry_t *top         = get_type_path_top(path);
3546                 ir_initializer_t  *initializer = top->initializer;
3547                 return get_initializer_compound_value(initializer, top->index);
3548         }
3549 }
3550
3551 static void descend_into_subtype(type_path_t *path)
3552 {
3553         type_t *orig_top_type = path->top_type;
3554         type_t *top_type      = skip_typeref(orig_top_type);
3555
3556         assert(is_type_compound(top_type) || is_type_array(top_type));
3557
3558         ir_initializer_t *initializer = get_initializer_entry(path);
3559
3560         type_path_entry_t *top = append_to_type_path(path);
3561         top->type              = top_type;
3562
3563         size_t len;
3564
3565         if (is_type_compound(top_type)) {
3566                 compound_t *const compound = top_type->compound.compound;
3567                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3568
3569                 top->compound_entry = entry;
3570                 top->index          = 0;
3571                 len                 = get_compound_member_count(&top_type->compound);
3572                 if (entry != NULL) {
3573                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3574                         path->top_type = entry->declaration.type;
3575                 }
3576         } else {
3577                 assert(is_type_array(top_type));
3578                 assert(top_type->array.size > 0);
3579
3580                 top->index     = 0;
3581                 path->top_type = top_type->array.element_type;
3582                 len            = top_type->array.size;
3583         }
3584         if (initializer == NULL
3585                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3586                 initializer = create_initializer_compound(len);
3587                 /* we have to set the entry at the 2nd latest path entry... */
3588                 size_t path_len = ARR_LEN(path->path);
3589                 assert(path_len >= 1);
3590                 if (path_len > 1) {
3591                         type_path_entry_t *entry        = & path->path[path_len-2];
3592                         ir_initializer_t  *tinitializer = entry->initializer;
3593                         set_initializer_compound_value(tinitializer, entry->index,
3594                                                        initializer);
3595                 }
3596         }
3597         top->initializer = initializer;
3598 }
3599
3600 static void ascend_from_subtype(type_path_t *path)
3601 {
3602         type_path_entry_t *top = get_type_path_top(path);
3603
3604         path->top_type = top->type;
3605
3606         size_t len = ARR_LEN(path->path);
3607         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3608 }
3609
3610 static void walk_designator(type_path_t *path, const designator_t *designator)
3611 {
3612         /* designators start at current object type */
3613         ARR_RESIZE(type_path_entry_t, path->path, 1);
3614
3615         for ( ; designator != NULL; designator = designator->next) {
3616                 type_path_entry_t *top         = get_type_path_top(path);
3617                 type_t            *orig_type   = top->type;
3618                 type_t            *type        = skip_typeref(orig_type);
3619
3620                 if (designator->symbol != NULL) {
3621                         assert(is_type_compound(type));
3622                         size_t    index  = 0;
3623                         symbol_t *symbol = designator->symbol;
3624
3625                         compound_t *compound = type->compound.compound;
3626                         entity_t   *iter     = compound->members.entities;
3627                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3628                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3629
3630                         /* revert previous initialisations of other union elements */
3631                         if (type->kind == TYPE_COMPOUND_UNION) {
3632                                 ir_initializer_t *initializer = top->initializer;
3633                                 if (initializer != NULL
3634                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3635                                         /* are we writing to a new element? */
3636                                         ir_initializer_t *oldi
3637                                                 = get_initializer_compound_value(initializer, index);
3638                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3639                                                 /* clear initializer */
3640                                                 size_t len
3641                                                         = get_initializer_compound_n_entries(initializer);
3642                                                 ir_initializer_t *nulli = get_initializer_null();
3643                                                 for (size_t i = 0; i < len; ++i) {
3644                                                         set_initializer_compound_value(initializer, i,
3645                                                                                        nulli);
3646                                                 }
3647                                         }
3648                                 }
3649                         }
3650
3651                         top->type           = orig_type;
3652                         top->compound_entry = iter;
3653                         top->index          = index;
3654                         orig_type           = iter->declaration.type;
3655                 } else {
3656                         expression_t *array_index = designator->array_index;
3657                         assert(is_type_array(type));
3658
3659                         long index = fold_constant_to_int(array_index);
3660                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3661
3662                         top->type  = orig_type;
3663                         top->index = (size_t) index;
3664                         orig_type  = type->array.element_type;
3665                 }
3666                 path->top_type = orig_type;
3667
3668                 if (designator->next != NULL) {
3669                         descend_into_subtype(path);
3670                 }
3671         }
3672
3673         path->invalid  = false;
3674 }
3675
3676 static void advance_current_object(type_path_t *path)
3677 {
3678         if (path->invalid) {
3679                 /* TODO: handle this... */
3680                 panic("invalid initializer in ast2firm (excessive elements)");
3681         }
3682
3683         type_path_entry_t *top = get_type_path_top(path);
3684
3685         type_t *type = skip_typeref(top->type);
3686         if (is_type_union(type)) {
3687                 /* only the first element is initialized in unions */
3688                 top->compound_entry = NULL;
3689         } else if (is_type_struct(type)) {
3690                 entity_t *entry = top->compound_entry;
3691
3692                 top->index++;
3693                 entry               = skip_unnamed_bitfields(entry->base.next);
3694                 top->compound_entry = entry;
3695                 if (entry != NULL) {
3696                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3697                         path->top_type = entry->declaration.type;
3698                         return;
3699                 }
3700         } else {
3701                 assert(is_type_array(type));
3702
3703                 top->index++;
3704                 if (!type->array.size_constant || top->index < type->array.size) {
3705                         return;
3706                 }
3707         }
3708
3709         /* we're past the last member of the current sub-aggregate, try if we
3710          * can ascend in the type hierarchy and continue with another subobject */
3711         size_t len = ARR_LEN(path->path);
3712
3713         if (len > 1) {
3714                 ascend_from_subtype(path);
3715                 advance_current_object(path);
3716         } else {
3717                 path->invalid = true;
3718         }
3719 }
3720
3721
3722 static ir_initializer_t *create_ir_initializer_value(
3723                 const initializer_value_t *initializer)
3724 {
3725         if (is_type_compound(initializer->value->base.type)) {
3726                 panic("initializer creation for compounds not implemented yet");
3727         }
3728         type_t       *type = initializer->value->base.type;
3729         expression_t *expr = initializer->value;
3730         ir_node *value = expression_to_firm(expr);
3731         ir_mode *mode  = get_ir_mode_storage(type);
3732         value          = create_conv(NULL, value, mode);
3733         return create_initializer_const(value);
3734 }
3735
3736 /** test wether type can be initialized by a string constant */
3737 static bool is_string_type(type_t *type)
3738 {
3739         if (!is_type_array(type))
3740                 return false;
3741
3742         type_t *const inner = skip_typeref(type->array.element_type);
3743         return is_type_integer(inner);
3744 }
3745
3746 static ir_initializer_t *create_ir_initializer_list(
3747                 const initializer_list_t *initializer, type_t *type)
3748 {
3749         type_path_t path;
3750         memset(&path, 0, sizeof(path));
3751         path.top_type = type;
3752         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3753
3754         descend_into_subtype(&path);
3755
3756         for (size_t i = 0; i < initializer->len; ++i) {
3757                 const initializer_t *sub_initializer = initializer->initializers[i];
3758
3759                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3760                         walk_designator(&path, sub_initializer->designator.designator);
3761                         continue;
3762                 }
3763
3764                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3765                         /* we might have to descend into types until we're at a scalar
3766                          * type */
3767                         while(true) {
3768                                 type_t *orig_top_type = path.top_type;
3769                                 type_t *top_type      = skip_typeref(orig_top_type);
3770
3771                                 if (is_type_scalar(top_type))
3772                                         break;
3773                                 descend_into_subtype(&path);
3774                         }
3775                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3776                         /* we might have to descend into types until we're at a scalar
3777                          * type */
3778                         while (true) {
3779                                 type_t *orig_top_type = path.top_type;
3780                                 type_t *top_type      = skip_typeref(orig_top_type);
3781
3782                                 if (is_string_type(top_type))
3783                                         break;
3784                                 descend_into_subtype(&path);
3785                         }
3786                 }
3787
3788                 ir_initializer_t *sub_irinitializer
3789                         = create_ir_initializer(sub_initializer, path.top_type);
3790
3791                 size_t path_len = ARR_LEN(path.path);
3792                 assert(path_len >= 1);
3793                 type_path_entry_t *entry        = & path.path[path_len-1];
3794                 ir_initializer_t  *tinitializer = entry->initializer;
3795                 set_initializer_compound_value(tinitializer, entry->index,
3796                                                sub_irinitializer);
3797
3798                 advance_current_object(&path);
3799         }
3800
3801         assert(ARR_LEN(path.path) >= 1);
3802         ir_initializer_t *result = path.path[0].initializer;
3803         DEL_ARR_F(path.path);
3804
3805         return result;
3806 }
3807
3808 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3809 {
3810         type = skip_typeref(type);
3811
3812         assert(type->kind == TYPE_ARRAY);
3813         assert(type->array.size_constant);
3814         string_literal_expression_t const *const str = get_init_string(init);
3815         size_t            const str_len = str->value.size;
3816         size_t            const arr_len = type->array.size;
3817         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
3818         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
3819         char const       *      p       = str->value.begin;
3820         switch (str->value.encoding) {
3821         case STRING_ENCODING_CHAR:
3822                 for (size_t i = 0; i != arr_len; ++i) {
3823                         char              const c      = i < str_len ? *p++ : 0;
3824                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3825                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3826                         set_initializer_compound_value(irinit, i, tvinit);
3827                 }
3828                 break;
3829
3830         case STRING_ENCODING_WIDE:
3831                 for (size_t i = 0; i != arr_len; ++i) {
3832                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
3833                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
3834                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3835                         set_initializer_compound_value(irinit, i, tvinit);
3836                 }
3837                 break;
3838         }
3839
3840         return irinit;
3841 }
3842
3843 static ir_initializer_t *create_ir_initializer(
3844                 const initializer_t *initializer, type_t *type)
3845 {
3846         switch(initializer->kind) {
3847                 case INITIALIZER_STRING:
3848                         return create_ir_initializer_string(initializer, type);
3849
3850                 case INITIALIZER_LIST:
3851                         return create_ir_initializer_list(&initializer->list, type);
3852
3853                 case INITIALIZER_VALUE:
3854                         return create_ir_initializer_value(&initializer->value);
3855
3856                 case INITIALIZER_DESIGNATOR:
3857                         panic("unexpected designator initializer found");
3858         }
3859         panic("unknown initializer");
3860 }
3861
3862 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
3863  *  are elements [...] the remainder of the aggregate shall be initialized
3864  *  implicitly the same as objects that have static storage duration. */
3865 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3866                 ir_node *base_addr)
3867 {
3868         /* for unions we must NOT do anything for null initializers */
3869         ir_type *owner = get_entity_owner(entity);
3870         if (is_Union_type(owner)) {
3871                 return;
3872         }
3873
3874         ir_type *ent_type = get_entity_type(entity);
3875         /* create sub-initializers for a compound type */
3876         if (is_compound_type(ent_type)) {
3877                 unsigned n_members = get_compound_n_members(ent_type);
3878                 for (unsigned n = 0; n < n_members; ++n) {
3879                         ir_entity *member = get_compound_member(ent_type, n);
3880                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3881                                                                 member);
3882                         create_dynamic_null_initializer(member, dbgi, addr);
3883                 }
3884                 return;
3885         }
3886         if (is_Array_type(ent_type)) {
3887                 assert(has_array_upper_bound(ent_type, 0));
3888                 long n = get_array_upper_bound_int(ent_type, 0);
3889                 for (long i = 0; i < n; ++i) {
3890                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3891                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3892                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3893                         ir_node   *in[1]    = { cnst };
3894                         ir_entity *arrent   = get_array_element_entity(ent_type);
3895                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3896                                                         arrent);
3897                         create_dynamic_null_initializer(arrent, dbgi, addr);
3898                 }
3899                 return;
3900         }
3901
3902         ir_mode *value_mode = get_type_mode(ent_type);
3903         ir_node *node       = new_Const(get_mode_null(value_mode));
3904
3905         /* is it a bitfield type? */
3906         if (is_Primitive_type(ent_type) &&
3907                         get_primitive_base_type(ent_type) != NULL) {
3908                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3909                 return;
3910         }
3911
3912         ir_node *mem    = get_store();
3913         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3914         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3915         set_store(proj_m);
3916 }
3917
3918 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3919                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3920 {
3921         switch(get_initializer_kind(initializer)) {
3922         case IR_INITIALIZER_NULL:
3923                 create_dynamic_null_initializer(entity, dbgi, base_addr);
3924                 return;
3925         case IR_INITIALIZER_CONST: {
3926                 ir_node *node     = get_initializer_const_value(initializer);
3927                 ir_type *ent_type = get_entity_type(entity);
3928
3929                 /* is it a bitfield type? */
3930                 if (is_Primitive_type(ent_type) &&
3931                                 get_primitive_base_type(ent_type) != NULL) {
3932                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3933                         return;
3934                 }
3935
3936                 assert(get_type_mode(type) == get_irn_mode(node));
3937                 ir_node *mem    = get_store();
3938                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3939                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3940                 set_store(proj_m);
3941                 return;
3942         }
3943         case IR_INITIALIZER_TARVAL: {
3944                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
3945                 ir_node   *cnst     = new_d_Const(dbgi, tv);
3946                 ir_type   *ent_type = get_entity_type(entity);
3947
3948                 /* is it a bitfield type? */
3949                 if (is_Primitive_type(ent_type) &&
3950                                 get_primitive_base_type(ent_type) != NULL) {
3951                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
3952                         return;
3953                 }
3954
3955                 assert(get_type_mode(type) == get_tarval_mode(tv));
3956                 ir_node *mem    = get_store();
3957                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3958                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3959                 set_store(proj_m);
3960                 return;
3961         }
3962         case IR_INITIALIZER_COMPOUND: {
3963                 assert(is_compound_type(type) || is_Array_type(type));
3964                 int n_members;
3965                 if (is_Array_type(type)) {
3966                         assert(has_array_upper_bound(type, 0));
3967                         n_members = get_array_upper_bound_int(type, 0);
3968                 } else {
3969                         n_members = get_compound_n_members(type);
3970                 }
3971
3972                 if (get_initializer_compound_n_entries(initializer)
3973                                 != (unsigned) n_members)
3974                         panic("initializer doesn't match compound type");
3975
3976                 for (int i = 0; i < n_members; ++i) {
3977                         ir_node   *addr;
3978                         ir_type   *irtype;
3979                         ir_entity *sub_entity;
3980                         if (is_Array_type(type)) {
3981                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3982                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3983                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3984                                 ir_node   *in[1]    = { cnst };
3985                                 irtype     = get_array_element_type(type);
3986                                 sub_entity = get_array_element_entity(type);
3987                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3988                                                        sub_entity);
3989                         } else {
3990                                 sub_entity = get_compound_member(type, i);
3991                                 irtype     = get_entity_type(sub_entity);
3992                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3993                                                              sub_entity);
3994                         }
3995
3996                         ir_initializer_t *sub_init
3997                                 = get_initializer_compound_value(initializer, i);
3998
3999                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4000                                                        addr);
4001                 }
4002                 return;
4003         }
4004         }
4005
4006         panic("invalid IR_INITIALIZER found");
4007 }
4008
4009 static void create_dynamic_initializer(ir_initializer_t *initializer,
4010                 dbg_info *dbgi, ir_entity *entity)
4011 {
4012         ir_node *frame     = get_irg_frame(current_ir_graph);
4013         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4014         ir_type *type      = get_entity_type(entity);
4015
4016         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4017 }
4018
4019 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4020                                      ir_entity *entity, type_t *type)
4021 {
4022         ir_node *memory = get_store();
4023         ir_node *nomem  = new_NoMem();
4024         ir_node *frame  = get_irg_frame(current_ir_graph);
4025         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4026
4027         if (initializer->kind == INITIALIZER_VALUE) {
4028                 initializer_value_t *initializer_value = &initializer->value;
4029
4030                 ir_node *value = expression_to_firm(initializer_value->value);
4031                 type = skip_typeref(type);
4032                 assign_value(dbgi, addr, type, value);
4033                 return;
4034         }
4035
4036         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4037                 ir_initializer_t *irinitializer
4038                         = create_ir_initializer(initializer, type);
4039
4040                 create_dynamic_initializer(irinitializer, dbgi, entity);
4041                 return;
4042         }
4043
4044         /* create a "template" entity which is copied to the entity on the stack */
4045         ir_entity *const init_entity
4046                 = create_initializer_entity(dbgi, initializer, type);
4047         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4048         ir_type *const irtype   = get_ir_type(type);
4049         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4050
4051         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4052         set_store(copyb_mem);
4053 }
4054
4055 static void create_initializer_local_variable_entity(entity_t *entity)
4056 {
4057         assert(entity->kind == ENTITY_VARIABLE);
4058         initializer_t *initializer = entity->variable.initializer;
4059         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4060         ir_entity     *irentity    = entity->variable.v.entity;
4061         type_t        *type        = entity->declaration.type;
4062
4063         create_local_initializer(initializer, dbgi, irentity, type);
4064 }
4065
4066 static void create_variable_initializer(entity_t *entity)
4067 {
4068         assert(entity->kind == ENTITY_VARIABLE);
4069         initializer_t *initializer = entity->variable.initializer;
4070         if (initializer == NULL)
4071                 return;
4072
4073         declaration_kind_t declaration_kind
4074                 = (declaration_kind_t) entity->declaration.kind;
4075         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4076                 create_initializer_local_variable_entity(entity);
4077                 return;
4078         }
4079
4080         type_t            *type = entity->declaration.type;
4081         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4082
4083         if (initializer->kind == INITIALIZER_VALUE) {
4084                 expression_t *      value     = initializer->value.value;
4085                 type_t       *const init_type = skip_typeref(value->base.type);
4086
4087                 if (!is_type_scalar(init_type)) {
4088                         /* skip convs */
4089                         while (value->kind == EXPR_UNARY_CAST)
4090                                 value = value->unary.value;
4091
4092                         if (value->kind != EXPR_COMPOUND_LITERAL)
4093                                 panic("expected non-scalar initializer to be a compound literal");
4094                         initializer = value->compound_literal.initializer;
4095                         goto have_initializer;
4096                 }
4097
4098                 ir_node  *      node = expression_to_firm(value);
4099                 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4100                 ir_mode  *const mode = get_ir_mode_storage(init_type);
4101                 node = create_conv(dbgi, node, mode);
4102
4103                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4104                         set_value(entity->variable.v.value_number, node);
4105                 } else {
4106                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4107
4108                         ir_entity *irentity = entity->variable.v.entity;
4109
4110                         if (tq & TYPE_QUALIFIER_CONST
4111                                         && get_entity_owner(irentity) != get_tls_type()) {
4112                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4113                         }
4114                         set_atomic_ent_value(irentity, node);
4115                 }
4116         } else {
4117 have_initializer:
4118                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4119                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4120
4121                 ir_entity        *irentity        = entity->variable.v.entity;
4122                 ir_initializer_t *irinitializer
4123                         = create_ir_initializer(initializer, type);
4124
4125                 if (tq & TYPE_QUALIFIER_CONST) {
4126                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4127                 }
4128                 set_entity_initializer(irentity, irinitializer);
4129         }
4130 }
4131
4132 static void create_variable_length_array(entity_t *entity)
4133 {
4134         assert(entity->kind == ENTITY_VARIABLE);
4135         assert(entity->variable.initializer == NULL);
4136
4137         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4138         entity->variable.v.vla_base = NULL;
4139
4140         /* TODO: record VLA somewhere so we create the free node when we leave
4141          * it's scope */
4142 }
4143
4144 static void allocate_variable_length_array(entity_t *entity)
4145 {
4146         assert(entity->kind == ENTITY_VARIABLE);
4147         assert(entity->variable.initializer == NULL);
4148         assert(currently_reachable());
4149
4150         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4151         type_t   *type      = entity->declaration.type;
4152         ir_type  *el_type   = get_ir_type(type->array.element_type);
4153
4154         /* make sure size_node is calculated */
4155         get_type_size_node(type);
4156         ir_node  *elems = type->array.size_node;
4157         ir_node  *mem   = get_store();
4158         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4159
4160         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4161         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4162         set_store(proj_m);
4163
4164         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4165         entity->variable.v.vla_base = addr;
4166 }
4167
4168 static bool var_needs_entity(variable_t const *const var)
4169 {
4170         if (var->address_taken)
4171                 return true;
4172         type_t *const type = skip_typeref(var->base.type);
4173         return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4174 }
4175
4176 /**
4177  * Creates a Firm local variable from a declaration.
4178  */
4179 static void create_local_variable(entity_t *entity)
4180 {
4181         assert(entity->kind == ENTITY_VARIABLE);
4182         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4183
4184         if (!var_needs_entity(&entity->variable)) {
4185                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4186                 entity->variable.v.value_number = next_value_number_function;
4187                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4188                 ++next_value_number_function;
4189                 return;
4190         }
4191
4192         /* is it a variable length array? */
4193         type_t *const type = skip_typeref(entity->declaration.type);
4194         if (is_type_array(type) && !type->array.size_constant) {
4195                 create_variable_length_array(entity);
4196                 return;
4197         }
4198
4199         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4200         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4201 }
4202
4203 static void create_local_static_variable(entity_t *entity)
4204 {
4205         assert(entity->kind == ENTITY_VARIABLE);
4206         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4207
4208         type_t   *type           = skip_typeref(entity->declaration.type);
4209         ir_type  *const var_type = entity->variable.thread_local ?
4210                 get_tls_type() : get_glob_type();
4211         ir_type  *const irtype   = get_ir_type(type);
4212         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4213
4214         size_t l = strlen(entity->base.symbol->string);
4215         char   buf[l + sizeof(".%u")];
4216         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4217         ident     *const id       = id_unique(buf);
4218         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4219
4220         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4221                 set_entity_volatility(irentity, volatility_is_volatile);
4222         }
4223
4224         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4225         entity->variable.v.entity = irentity;
4226
4227         set_entity_ld_ident(irentity, id);
4228         set_entity_visibility(irentity, ir_visibility_local);
4229
4230         if (entity->variable.initializer == NULL) {
4231                 ir_initializer_t *null_init = get_initializer_null();
4232                 set_entity_initializer(irentity, null_init);
4233         }
4234
4235         PUSH_IRG(get_const_code_irg());
4236         create_variable_initializer(entity);
4237         POP_IRG();
4238 }
4239
4240
4241
4242 static ir_node *return_statement_to_firm(return_statement_t *statement)
4243 {
4244         if (!currently_reachable())
4245                 return NULL;
4246
4247         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4248         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4249         ir_node  *      res  = statement->value ? expression_to_firm(statement->value) : NULL;
4250
4251         int in_len;
4252         if (!is_type_void(type)) {
4253                 ir_mode *const mode = get_ir_mode_storage(type);
4254                 if (res) {
4255                         res = create_conv(dbgi, res, mode);
4256                 } else {
4257                         res = new_Unknown(mode);
4258                 }
4259                 in_len = 1;
4260         } else {
4261                 in_len = 0;
4262         }
4263
4264         ir_node *const in[1] = { res };
4265         ir_node *const store = get_store();
4266         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4267
4268         ir_node *end_block = get_irg_end_block(current_ir_graph);
4269         add_immBlock_pred(end_block, ret);
4270
4271         set_unreachable_now();
4272         return NULL;
4273 }
4274
4275 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4276 {
4277         if (!currently_reachable())
4278                 return NULL;
4279
4280         return expression_to_firm(statement->expression);
4281 }
4282
4283 static void create_local_declarations(entity_t*);
4284
4285 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4286 {
4287         create_local_declarations(compound->scope.entities);
4288
4289         ir_node     *result    = NULL;
4290         statement_t *statement = compound->statements;
4291         for ( ; statement != NULL; statement = statement->base.next) {
4292                 result = statement_to_firm(statement);
4293         }
4294
4295         return result;
4296 }
4297
4298 static void create_global_variable(entity_t *entity)
4299 {
4300         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4301         ir_visibility       visibility = ir_visibility_external;
4302         storage_class_tag_t storage
4303                 = (storage_class_tag_t)entity->declaration.storage_class;
4304         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4305         assert(entity->kind == ENTITY_VARIABLE);
4306
4307         switch (storage) {
4308         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4309         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4310         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4311         case STORAGE_CLASS_TYPEDEF:
4312         case STORAGE_CLASS_AUTO:
4313         case STORAGE_CLASS_REGISTER:
4314                 panic("invalid storage class for global var");
4315         }
4316
4317         /* "common" symbols */
4318         if (storage == STORAGE_CLASS_NONE
4319             && entity->variable.initializer == NULL
4320             && !entity->variable.thread_local
4321             && (modifiers & DM_WEAK) == 0) {
4322                 linkage |= IR_LINKAGE_MERGE;
4323         }
4324
4325         ir_type *var_type = get_glob_type();
4326         if (entity->variable.thread_local) {
4327                 var_type = get_tls_type();
4328         }
4329         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4330         ir_entity *irentity = entity->variable.v.entity;
4331         add_entity_linkage(irentity, linkage);
4332         set_entity_visibility(irentity, visibility);
4333         if (entity->variable.initializer == NULL
4334             && storage != STORAGE_CLASS_EXTERN) {
4335                 ir_initializer_t *null_init = get_initializer_null();
4336                 set_entity_initializer(irentity, null_init);
4337         }
4338 }
4339
4340 static void create_local_declaration(entity_t *entity)
4341 {
4342         assert(is_declaration(entity));
4343
4344         /* construct type */
4345         (void) get_ir_type(entity->declaration.type);
4346         if (entity->base.symbol == NULL) {
4347                 return;
4348         }
4349
4350         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4351         case STORAGE_CLASS_STATIC:
4352                 if (entity->kind == ENTITY_FUNCTION) {
4353                         (void)get_function_entity(entity, NULL);
4354                 } else {
4355                         create_local_static_variable(entity);
4356                 }
4357                 return;
4358         case STORAGE_CLASS_EXTERN:
4359                 if (entity->kind == ENTITY_FUNCTION) {
4360                         assert(entity->function.body == NULL);
4361                         (void)get_function_entity(entity, NULL);
4362                 } else {
4363                         create_global_variable(entity);
4364                         create_variable_initializer(entity);
4365                 }
4366                 return;
4367         case STORAGE_CLASS_NONE:
4368         case STORAGE_CLASS_AUTO:
4369         case STORAGE_CLASS_REGISTER:
4370                 if (entity->kind == ENTITY_FUNCTION) {
4371                         if (entity->function.body != NULL) {
4372                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4373                                 (void)get_function_entity(entity, owner);
4374                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4375                                 enqueue_inner_function(entity);
4376                         } else {
4377                                 (void)get_function_entity(entity, NULL);
4378                         }
4379                 } else {
4380                         create_local_variable(entity);
4381                 }
4382                 return;
4383         case STORAGE_CLASS_TYPEDEF:
4384                 break;
4385         }
4386         panic("invalid storage class found");
4387 }
4388
4389 static void create_local_declarations(entity_t *e)
4390 {
4391         for (; e; e = e->base.next) {
4392                 if (is_declaration(e))
4393                         create_local_declaration(e);
4394         }
4395 }
4396
4397 static void initialize_local_declaration(entity_t *entity)
4398 {
4399         if (entity->base.symbol == NULL)
4400                 return;
4401
4402         // no need to emit code in dead blocks
4403         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4404                         && !currently_reachable())
4405                 return;
4406
4407         switch ((declaration_kind_t) entity->declaration.kind) {
4408         case DECLARATION_KIND_LOCAL_VARIABLE:
4409         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4410                 create_variable_initializer(entity);
4411                 return;
4412
4413         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4414                 allocate_variable_length_array(entity);
4415                 return;
4416
4417         case DECLARATION_KIND_COMPOUND_MEMBER:
4418         case DECLARATION_KIND_GLOBAL_VARIABLE:
4419         case DECLARATION_KIND_FUNCTION:
4420         case DECLARATION_KIND_INNER_FUNCTION:
4421                 return;
4422
4423         case DECLARATION_KIND_PARAMETER:
4424         case DECLARATION_KIND_PARAMETER_ENTITY:
4425                 panic("can't initialize parameters");
4426
4427         case DECLARATION_KIND_UNKNOWN:
4428                 panic("can't initialize unknown declaration");
4429         }
4430         panic("invalid declaration kind");
4431 }
4432
4433 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4434 {
4435         entity_t *entity = statement->declarations_begin;
4436         if (entity == NULL)
4437                 return NULL;
4438
4439         entity_t *const last = statement->declarations_end;
4440         for ( ;; entity = entity->base.next) {
4441                 if (is_declaration(entity)) {
4442                         initialize_local_declaration(entity);
4443                 } else if (entity->kind == ENTITY_TYPEDEF) {
4444                         /* §6.7.7:3  Any array size expressions associated with variable length
4445                          * array declarators are evaluated each time the declaration of the
4446                          * typedef name is reached in the order of execution. */
4447                         type_t *const type = skip_typeref(entity->typedefe.type);
4448                         if (is_type_array(type) && type->array.is_vla)
4449                                 get_vla_size(&type->array);
4450                 }
4451                 if (entity == last)
4452                         break;
4453         }
4454
4455         return NULL;
4456 }
4457
4458 static ir_node *if_statement_to_firm(if_statement_t *statement)
4459 {
4460         create_local_declarations(statement->scope.entities);
4461
4462         /* Create the condition. */
4463         ir_node *true_block  = NULL;
4464         ir_node *false_block = NULL;
4465         if (currently_reachable()) {
4466                 true_block  = new_immBlock();
4467                 false_block = new_immBlock();
4468                 create_condition_evaluation(statement->condition, true_block, false_block);
4469                 mature_immBlock(true_block);
4470                 mature_immBlock(false_block);
4471         }
4472
4473         /* Create the true statement. */
4474         set_cur_block(true_block);
4475         statement_to_firm(statement->true_statement);
4476         ir_node *fallthrough_block = get_cur_block();
4477
4478         /* Create the false statement. */
4479         set_cur_block(false_block);
4480         if (statement->false_statement != NULL) {
4481                 statement_to_firm(statement->false_statement);
4482         }
4483
4484         /* Handle the block after the if-statement.  Minor simplification and
4485          * optimisation: Reuse the false/true block as fallthrough block, if the
4486          * true/false statement does not pass control to the fallthrough block, e.g.
4487          * in the typical if (x) return; pattern. */
4488         if (fallthrough_block) {
4489                 if (currently_reachable()) {
4490                         ir_node *const t_jump = new_r_Jmp(fallthrough_block);
4491                         ir_node *const f_jump = new_Jmp();
4492                         ir_node *const in[]   = { t_jump, f_jump };
4493                         fallthrough_block = new_Block(2, in);
4494                 }
4495                 set_cur_block(fallthrough_block);
4496         }
4497
4498         return NULL;
4499 }
4500
4501 /**
4502  * Add an unconditional jump to the target block.  If the source block is not
4503  * reachable, then a Bad predecessor is created to prevent Phi-less unreachable
4504  * loops.  This is necessary if the jump potentially enters a loop.
4505  */
4506 static void jump_to(ir_node *const target_block)
4507 {
4508         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4509         add_immBlock_pred(target_block, pred);
4510         set_cur_block(target_block);
4511 }
4512
4513 /**
4514  * Add an unconditional jump to the target block, if the current block is
4515  * reachable and do nothing otherwise.  This is only valid if the jump does not
4516  * enter a loop (a back edge is ok).
4517  */
4518 static void jump_if_reachable(ir_node *const target_block)
4519 {
4520         if (currently_reachable())
4521                 add_immBlock_pred(target_block, new_Jmp());
4522 }
4523
4524 static ir_node *get_break_label(void)
4525 {
4526         if (break_label == NULL) {
4527                 break_label = new_immBlock();
4528         }
4529         return break_label;
4530 }
4531
4532 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4533 {
4534         create_local_declarations(statement->scope.entities);
4535
4536         /* create the header block */
4537         ir_node *header_block = new_immBlock();
4538
4539         PUSH_BREAK(NULL);
4540         PUSH_CONTINUE(header_block);
4541
4542         /* The loop body. */
4543         ir_node            *body_block = NULL;
4544         expression_t *const cond       = statement->condition;
4545         /* Avoid an explicit body block in case of do ... while (0);. */
4546         if (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || fold_constant_to_bool(cond)) {
4547                 /* Not do ... while (0);. */
4548                 body_block = new_immBlock();
4549                 jump_to(body_block);
4550         }
4551         statement_to_firm(statement->body);
4552
4553         /* create the condition */
4554         jump_if_reachable(header_block);
4555         mature_immBlock(header_block);
4556         set_cur_block(header_block);
4557         ir_node *const false_block = get_break_label();
4558         if (body_block) {
4559                 create_condition_evaluation(statement->condition, body_block, false_block);
4560                 mature_immBlock(body_block);
4561         } else {
4562                 jump_if_reachable(false_block);
4563         }
4564         mature_immBlock(false_block);
4565         set_cur_block(false_block);
4566
4567         POP_CONTINUE();
4568         POP_BREAK();
4569         return NULL;
4570 }
4571
4572 static ir_node *for_statement_to_firm(for_statement_t *statement)
4573 {
4574         create_local_declarations(statement->scope.entities);
4575
4576         if (currently_reachable()) {
4577                 entity_t *entity = statement->scope.entities;
4578                 for ( ; entity != NULL; entity = entity->base.next) {
4579                         if (!is_declaration(entity))
4580                                 continue;
4581
4582                         initialize_local_declaration(entity);
4583                 }
4584
4585                 if (statement->initialisation != NULL) {
4586                         expression_to_firm(statement->initialisation);
4587                 }
4588         }
4589
4590         /* Create the header block */
4591         ir_node *const header_block = new_immBlock();
4592         jump_to(header_block);
4593
4594         /* Create the condition. */
4595         ir_node            *false_block;
4596         expression_t *const cond = statement->condition;
4597         if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4598                 false_block = new_immBlock();
4599
4600                 ir_node *const body_block = new_immBlock();
4601                 create_condition_evaluation(cond, body_block, false_block);
4602                 mature_immBlock(body_block);
4603                 set_cur_block(body_block);
4604         } else {
4605                 /* for-ever. */
4606                 false_block = NULL;
4607
4608                 keep_alive(header_block);
4609                 keep_all_memory(header_block);
4610         }
4611
4612         /* Create the step block, if necessary. */
4613         ir_node      *      step_block = header_block;
4614         expression_t *const step       = statement->step;
4615         if (step != NULL) {
4616                 step_block = new_immBlock();
4617         }
4618
4619         PUSH_BREAK(false_block);
4620         PUSH_CONTINUE(step_block);
4621
4622         /* Create the loop body. */
4623         statement_to_firm(statement->body);
4624         jump_if_reachable(step_block);
4625
4626         /* Create the step code. */
4627         if (step != NULL) {
4628                 mature_immBlock(step_block);
4629                 set_cur_block(step_block);
4630                 expression_to_firm(step);
4631                 jump_if_reachable(header_block);
4632         }
4633
4634         mature_immBlock(header_block);
4635         assert(false_block == NULL || false_block == break_label);
4636         false_block = break_label;
4637         if (false_block != NULL) {
4638                 mature_immBlock(false_block);
4639         }
4640         set_cur_block(false_block);
4641
4642         POP_CONTINUE();
4643         POP_BREAK();
4644         return NULL;
4645 }
4646
4647 static ir_node *create_jump_statement(const statement_t *statement, ir_node *target_block)
4648 {
4649         if (!currently_reachable())
4650                 return NULL;
4651
4652         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4653         ir_node  *jump = new_d_Jmp(dbgi);
4654         add_immBlock_pred(target_block, jump);
4655
4656         set_unreachable_now();
4657         return NULL;
4658 }
4659
4660 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4661 {
4662         /* determine number of cases */
4663         size_t n_cases = 0;
4664         for (case_label_statement_t *l = statement->first_case; l != NULL;
4665              l = l->next) {
4666                 /* default case */
4667                 if (l->expression == NULL)
4668                         continue;
4669                 if (l->is_empty_range)
4670                         continue;
4671                 ++n_cases;
4672         }
4673
4674         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4675         size_t           i   = 0;
4676         for (case_label_statement_t *l = statement->first_case; l != NULL;
4677              l = l->next) {
4678             if (l->expression == NULL) {
4679                         l->pn = pn_Switch_default;
4680                         continue;
4681                 }
4682                 if (l->is_empty_range)
4683                         continue;
4684                 ir_tarval *min = fold_constant_to_tarval(l->expression);
4685                 ir_tarval *max = min;
4686                 long       pn  = (long) i+1;
4687                 if (l->end_range != NULL)
4688                         max = fold_constant_to_tarval(l->end_range);
4689                 ir_switch_table_set(res, i++, min, max, pn);
4690                 l->pn = pn;
4691         }
4692         return res;
4693 }
4694
4695 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4696 {
4697         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4698         ir_node  *switch_node = NULL;
4699
4700         if (currently_reachable()) {
4701                 ir_node *expression = expression_to_firm(statement->expression);
4702                 ir_switch_table *table = create_switch_table(statement);
4703                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4704
4705                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4706         }
4707
4708         set_unreachable_now();
4709
4710         PUSH_BREAK(NULL);
4711         ir_node *const old_switch            = current_switch;
4712         const bool     old_saw_default_label = saw_default_label;
4713         saw_default_label                    = false;
4714         current_switch                       = switch_node;
4715
4716         statement_to_firm(statement->body);
4717
4718         if (currently_reachable()) {
4719                 add_immBlock_pred(get_break_label(), new_Jmp());
4720         }
4721
4722         if (!saw_default_label && switch_node) {
4723                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4724                 add_immBlock_pred(get_break_label(), proj);
4725         }
4726
4727         if (break_label != NULL) {
4728                 mature_immBlock(break_label);
4729         }
4730         set_cur_block(break_label);
4731
4732         assert(current_switch == switch_node);
4733         current_switch    = old_switch;
4734         saw_default_label = old_saw_default_label;
4735         POP_BREAK();
4736         return NULL;
4737 }
4738
4739 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4740 {
4741         if (statement->is_empty_range)
4742                 return NULL;
4743
4744         if (current_switch != NULL) {
4745                 ir_node *block = new_immBlock();
4746                 /* Fallthrough from previous case */
4747                 jump_if_reachable(block);
4748
4749                 ir_node  *const proj = new_Proj(current_switch, mode_X, statement->pn);
4750                 add_immBlock_pred(block, proj);
4751                 if (statement->expression == NULL)
4752                         saw_default_label = true;
4753
4754                 mature_immBlock(block);
4755                 set_cur_block(block);
4756         }
4757
4758         return statement_to_firm(statement->statement);
4759 }
4760
4761 static ir_node *label_to_firm(const label_statement_t *statement)
4762 {
4763         ir_node *block = get_label_block(statement->label);
4764         jump_to(block);
4765
4766         keep_alive(block);
4767         keep_all_memory(block);
4768
4769         return statement_to_firm(statement->statement);
4770 }
4771
4772 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4773 {
4774         if (!currently_reachable())
4775                 return NULL;
4776
4777         ir_node  *const irn  = expression_to_firm(statement->expression);
4778         dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
4779         ir_node  *const ijmp = new_d_IJmp(dbgi, irn);
4780
4781         set_irn_link(ijmp, ijmp_list);
4782         ijmp_list = ijmp;
4783
4784         set_unreachable_now();
4785         return NULL;
4786 }
4787
4788 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4789 {
4790         bool           needs_memory = statement->is_volatile;
4791         size_t         n_clobbers   = 0;
4792         asm_clobber_t *clobber      = statement->clobbers;
4793         for ( ; clobber != NULL; clobber = clobber->next) {
4794                 const char *clobber_str = clobber->clobber.begin;
4795
4796                 if (!be_is_valid_clobber(clobber_str)) {
4797                         errorf(&statement->base.source_position,
4798                                    "invalid clobber '%s' specified", clobber->clobber);
4799                         continue;
4800                 }
4801
4802                 if (streq(clobber_str, "memory")) {
4803                         needs_memory = true;
4804                         continue;
4805                 }
4806
4807                 ident *id = new_id_from_str(clobber_str);
4808                 obstack_ptr_grow(&asm_obst, id);
4809                 ++n_clobbers;
4810         }
4811         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4812         ident **clobbers = NULL;
4813         if (n_clobbers > 0) {
4814                 clobbers = obstack_finish(&asm_obst);
4815         }
4816
4817         size_t n_inputs  = 0;
4818         asm_argument_t *argument = statement->inputs;
4819         for ( ; argument != NULL; argument = argument->next)
4820                 n_inputs++;
4821         size_t n_outputs = 0;
4822         argument = statement->outputs;
4823         for ( ; argument != NULL; argument = argument->next)
4824                 n_outputs++;
4825
4826         unsigned next_pos = 0;
4827
4828         ir_node *ins[n_inputs + n_outputs + 1];
4829         size_t   in_size = 0;
4830
4831         ir_asm_constraint tmp_in_constraints[n_outputs];
4832
4833         const expression_t *out_exprs[n_outputs];
4834         ir_node            *out_addrs[n_outputs];
4835         size_t              out_size = 0;
4836
4837         argument = statement->outputs;
4838         for ( ; argument != NULL; argument = argument->next) {
4839                 const char *constraints = argument->constraints.begin;
4840                 asm_constraint_flags_t asm_flags
4841                         = be_parse_asm_constraints(constraints);
4842
4843                 {
4844                         source_position_t const *const pos = &statement->base.source_position;
4845                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4846                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4847                         }
4848                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4849                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
4850                                 continue;
4851                         }
4852                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4853                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4854                                 continue;
4855                         }
4856                 }
4857
4858                 unsigned pos = next_pos++;
4859                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4860                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4861                         expression_t *expr = argument->expression;
4862                         ir_node      *addr = expression_to_addr(expr);
4863                         /* in+output, construct an artifical same_as constraint on the
4864                          * input */
4865                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4866                                 char     buf[64];
4867                                 ir_node *value = get_value_from_lvalue(expr, addr);
4868
4869                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4870
4871                                 ir_asm_constraint constraint;
4872                                 constraint.pos              = pos;
4873                                 constraint.constraint       = new_id_from_str(buf);
4874                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4875                                 tmp_in_constraints[in_size] = constraint;
4876                                 ins[in_size] = value;
4877
4878                                 ++in_size;
4879                         }
4880
4881                         out_exprs[out_size] = expr;
4882                         out_addrs[out_size] = addr;
4883                         ++out_size;
4884                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4885                         /* pure memory ops need no input (but we have to make sure we
4886                          * attach to the memory) */
4887                         assert(! (asm_flags &
4888                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4889                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4890                         needs_memory = true;
4891
4892                         /* we need to attach the address to the inputs */
4893                         expression_t *expr = argument->expression;
4894
4895                         ir_asm_constraint constraint;
4896                         constraint.pos              = pos;
4897                         constraint.constraint       = new_id_from_str(constraints);
4898                         constraint.mode             = mode_M;
4899                         tmp_in_constraints[in_size] = constraint;
4900
4901                         ins[in_size] = expression_to_addr(expr);
4902                         ++in_size;
4903                         continue;
4904                 } else {
4905                         errorf(&statement->base.source_position,
4906                                "only modifiers but no place set in constraints '%s'",
4907                                constraints);
4908                         continue;
4909                 }
4910
4911                 ir_asm_constraint constraint;
4912                 constraint.pos        = pos;
4913                 constraint.constraint = new_id_from_str(constraints);
4914                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
4915
4916                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4917         }
4918         assert(obstack_object_size(&asm_obst)
4919                         == out_size * sizeof(ir_asm_constraint));
4920         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4921
4922
4923         obstack_grow(&asm_obst, tmp_in_constraints,
4924                      in_size * sizeof(tmp_in_constraints[0]));
4925         /* find and count input and output arguments */
4926         argument = statement->inputs;
4927         for ( ; argument != NULL; argument = argument->next) {
4928                 const char *constraints = argument->constraints.begin;
4929                 asm_constraint_flags_t asm_flags
4930                         = be_parse_asm_constraints(constraints);
4931
4932                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4933                         errorf(&statement->base.source_position,
4934                                "some constraints in '%s' are not supported", constraints);
4935                         continue;
4936                 }
4937                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4938                         errorf(&statement->base.source_position,
4939                                "some constraints in '%s' are invalid", constraints);
4940                         continue;
4941                 }
4942                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4943                         errorf(&statement->base.source_position,
4944                                "write flag specified for input constraints '%s'",
4945                                constraints);
4946                         continue;
4947                 }
4948
4949                 ir_node *input;
4950                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4951                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4952                         /* we can treat this as "normal" input */
4953                         input = expression_to_firm(argument->expression);
4954                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4955                         /* pure memory ops need no input (but we have to make sure we
4956                          * attach to the memory) */
4957                         assert(! (asm_flags &
4958                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4959                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4960                         needs_memory = true;
4961                         input = expression_to_addr(argument->expression);
4962                 } else {
4963                         errorf(&statement->base.source_position,
4964                                "only modifiers but no place set in constraints '%s'",
4965                                constraints);
4966                         continue;
4967                 }
4968
4969                 ir_asm_constraint constraint;
4970                 constraint.pos        = next_pos++;
4971                 constraint.constraint = new_id_from_str(constraints);
4972                 constraint.mode       = get_irn_mode(input);
4973
4974                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4975                 ins[in_size++] = input;
4976         }
4977
4978         ir_node *mem = needs_memory ? get_store() : new_NoMem();
4979         assert(obstack_object_size(&asm_obst)
4980                         == in_size * sizeof(ir_asm_constraint));
4981         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4982
4983         /* create asm node */
4984         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4985
4986         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4987
4988         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4989                                   out_size, output_constraints,
4990                                   n_clobbers, clobbers, asm_text);
4991
4992         if (statement->is_volatile) {
4993                 set_irn_pinned(node, op_pin_state_pinned);
4994         } else {
4995                 set_irn_pinned(node, op_pin_state_floats);
4996         }
4997
4998         /* create output projs & connect them */
4999         if (needs_memory) {
5000                 ir_node *projm = new_Proj(node, mode_M, out_size);
5001                 set_store(projm);
5002         }
5003
5004         size_t i;
5005         for (i = 0; i < out_size; ++i) {
5006                 const expression_t *out_expr = out_exprs[i];
5007                 long                pn       = i;
5008                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5009                 ir_node            *proj     = new_Proj(node, mode, pn);
5010                 ir_node            *addr     = out_addrs[i];
5011
5012                 set_value_for_expression_addr(out_expr, proj, addr);
5013         }
5014
5015         return NULL;
5016 }
5017
5018 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5019 {
5020         statement_to_firm(statement->try_statement);
5021         source_position_t const *const pos = &statement->base.source_position;
5022         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5023         return NULL;
5024 }
5025
5026 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5027 {
5028         errorf(&statement->base.source_position, "__leave not supported yet");
5029         return NULL;
5030 }
5031
5032 /**
5033  * Transform a statement.
5034  */
5035 static ir_node *statement_to_firm(statement_t *const stmt)
5036 {
5037 #ifndef NDEBUG
5038         assert(!stmt->base.transformed);
5039         stmt->base.transformed = true;
5040 #endif
5041
5042         switch (stmt->kind) {
5043         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5044         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5045         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5046         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5047         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5048         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5049         case STATEMENT_EMPTY:         return NULL; /* nothing */
5050         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5051         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5052         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5053         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5054         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5055         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5056         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5057         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5058
5059         case STATEMENT_BREAK:         return create_jump_statement(stmt, get_break_label());
5060         case STATEMENT_CONTINUE:      return create_jump_statement(stmt, continue_label);
5061         case STATEMENT_GOTO:          return create_jump_statement(stmt, get_label_block(stmt->gotos.label));
5062
5063         case STATEMENT_ERROR: panic("error statement found");
5064         }
5065         panic("statement not implemented");
5066 }
5067
5068 static int count_local_variables(const entity_t *entity,
5069                                  const entity_t *const last)
5070 {
5071         int count = 0;
5072         entity_t const *const end = last != NULL ? last->base.next : NULL;
5073         for (; entity != end; entity = entity->base.next) {
5074                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5075                     !var_needs_entity(&entity->variable))
5076                         ++count;
5077         }
5078         return count;
5079 }
5080
5081 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5082 {
5083         int *const count = env;
5084
5085         switch (stmt->kind) {
5086         case STATEMENT_DECLARATION: {
5087                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5088                 *count += count_local_variables(decl_stmt->declarations_begin,
5089                                 decl_stmt->declarations_end);
5090                 break;
5091         }
5092
5093         case STATEMENT_FOR:
5094                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5095                 break;
5096
5097         default:
5098                 break;
5099         }
5100 }
5101
5102 /**
5103  * Return the number of local (alias free) variables used by a function.
5104  */
5105 static int get_function_n_local_vars(entity_t *entity)
5106 {
5107         const function_t *function = &entity->function;
5108         int count = 0;
5109
5110         /* count parameters */
5111         count += count_local_variables(function->parameters.entities, NULL);
5112
5113         /* count local variables declared in body */
5114         walk_statements(function->body, count_local_variables_in_stmt, &count);
5115         return count;
5116 }
5117
5118 /**
5119  * Build Firm code for the parameters of a function.
5120  */
5121 static void initialize_function_parameters(entity_t *entity)
5122 {
5123         assert(entity->kind == ENTITY_FUNCTION);
5124         ir_graph *irg             = current_ir_graph;
5125         ir_node  *args            = get_irg_args(irg);
5126         int       n               = 0;
5127         ir_type  *function_irtype;
5128
5129         if (entity->function.need_closure) {
5130                 /* add an extra parameter for the static link */
5131                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5132                 ++n;
5133
5134                 /* Matze: IMO this is wrong, nested functions should have an own
5135                  * type and not rely on strange parameters... */
5136                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5137         } else {
5138                 function_irtype = get_ir_type(entity->declaration.type);
5139         }
5140
5141
5142
5143         entity_t *parameter = entity->function.parameters.entities;
5144         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5145                 if (parameter->kind != ENTITY_PARAMETER)
5146                         continue;
5147
5148                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5149                 type_t *type = skip_typeref(parameter->declaration.type);
5150
5151                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.source_position);
5152                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5153                 if (var_needs_entity(&parameter->variable)) {
5154                         ir_type   *frame_type = get_irg_frame_type(irg);
5155                         ir_entity *param
5156                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5157                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5158                         parameter->variable.v.entity = param;
5159                         continue;
5160                 }
5161
5162                 ir_mode *param_mode = get_type_mode(param_irtype);
5163                 long     pn         = n;
5164                 ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5165
5166                 ir_mode *mode = get_ir_mode_storage(type);
5167                 value = create_conv(NULL, value, mode);
5168
5169                 parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5170                 parameter->variable.v.value_number = next_value_number_function;
5171                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5172                                         parameter);
5173                 ++next_value_number_function;
5174
5175                 set_value(parameter->variable.v.value_number, value);
5176         }
5177 }
5178
5179 /**
5180  * Handle additional decl modifiers for IR-graphs
5181  *
5182  * @param irg            the IR-graph
5183  * @param dec_modifiers  additional modifiers
5184  */
5185 static void handle_decl_modifier_irg(ir_graph *irg,
5186                                      decl_modifiers_t decl_modifiers)
5187 {
5188         if (decl_modifiers & DM_NAKED) {
5189                 /* TRUE if the declaration includes the Microsoft
5190                    __declspec(naked) specifier. */
5191                 add_irg_additional_properties(irg, mtp_property_naked);
5192         }
5193         if (decl_modifiers & DM_FORCEINLINE) {
5194                 /* TRUE if the declaration includes the
5195                    Microsoft __forceinline specifier. */
5196                 set_irg_inline_property(irg, irg_inline_forced);
5197         }
5198         if (decl_modifiers & DM_NOINLINE) {
5199                 /* TRUE if the declaration includes the Microsoft
5200                    __declspec(noinline) specifier. */
5201                 set_irg_inline_property(irg, irg_inline_forbidden);
5202         }
5203 }
5204
5205 static void add_function_pointer(ir_type *segment, ir_entity *method,
5206                                  const char *unique_template)
5207 {
5208         ir_type   *method_type  = get_entity_type(method);
5209         ir_type   *ptr_type     = new_type_pointer(method_type);
5210
5211         /* these entities don't really have a name but firm only allows
5212          * "" in ld_ident.
5213          * Note that we mustn't give these entities a name since for example
5214          * Mach-O doesn't allow them. */
5215         ident     *ide          = id_unique(unique_template);
5216         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5217         ir_graph  *irg          = get_const_code_irg();
5218         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5219                                                            method);
5220
5221         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5222         set_entity_compiler_generated(ptr, 1);
5223         set_entity_visibility(ptr, ir_visibility_private);
5224         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5225         set_atomic_ent_value(ptr, val);
5226 }
5227
5228 /**
5229  * Generate possible IJmp branches to a given label block.
5230  */
5231 static void gen_ijmp_branches(ir_node *block)
5232 {
5233         ir_node *ijmp;
5234         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5235                 add_immBlock_pred(block, ijmp);
5236         }
5237 }
5238
5239 /**
5240  * Create code for a function and all inner functions.
5241  *
5242  * @param entity  the function entity
5243  */
5244 static void create_function(entity_t *entity)
5245 {
5246         assert(entity->kind == ENTITY_FUNCTION);
5247         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5248
5249         if (entity->function.body == NULL)
5250                 return;
5251
5252         inner_functions     = NULL;
5253         current_trampolines = NULL;
5254
5255         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5256                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5257                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5258         }
5259         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5260                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5261                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5262         }
5263
5264         current_function_entity = entity;
5265         current_function_name   = NULL;
5266         current_funcsig         = NULL;
5267
5268         assert(all_labels == NULL);
5269         all_labels = NEW_ARR_F(label_t *, 0);
5270         ijmp_list  = NULL;
5271
5272         int       n_local_vars = get_function_n_local_vars(entity);
5273         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5274         current_ir_graph = irg;
5275
5276         ir_graph *old_current_function = current_function;
5277         current_function = irg;
5278
5279         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5280         current_vararg_entity = NULL;
5281
5282         set_irg_fp_model(irg, firm_fp_model);
5283         tarval_enable_fp_ops(1);
5284         set_irn_dbg_info(get_irg_start_block(irg),
5285                          get_entity_dbg_info(function_entity));
5286
5287         /* set inline flags */
5288         if (entity->function.is_inline)
5289                 set_irg_inline_property(irg, irg_inline_recomended);
5290         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5291
5292         next_value_number_function = 0;
5293         initialize_function_parameters(entity);
5294         current_static_link = entity->function.static_link;
5295
5296         statement_to_firm(entity->function.body);
5297
5298         ir_node *end_block = get_irg_end_block(irg);
5299
5300         /* do we have a return statement yet? */
5301         if (currently_reachable()) {
5302                 type_t *type = skip_typeref(entity->declaration.type);
5303                 assert(is_type_function(type));
5304                 type_t *const return_type = skip_typeref(type->function.return_type);
5305
5306                 ir_node *ret;
5307                 if (is_type_void(return_type)) {
5308                         ret = new_Return(get_store(), 0, NULL);
5309                 } else {
5310                         ir_mode *const mode = get_ir_mode_storage(return_type);
5311
5312                         ir_node *in[1];
5313                         /* §5.1.2.2.3 main implicitly returns 0 */
5314                         if (is_main(entity)) {
5315                                 in[0] = new_Const(get_mode_null(mode));
5316                         } else {
5317                                 in[0] = new_Unknown(mode);
5318                         }
5319                         ret = new_Return(get_store(), 1, in);
5320                 }
5321                 add_immBlock_pred(end_block, ret);
5322         }
5323
5324         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5325                 label_t *label = all_labels[i];
5326                 if (label->address_taken) {
5327                         gen_ijmp_branches(label->block);
5328                 }
5329                 mature_immBlock(label->block);
5330         }
5331
5332         DEL_ARR_F(all_labels);
5333         all_labels = NULL;
5334
5335         irg_finalize_cons(irg);
5336
5337         /* finalize the frame type */
5338         ir_type *frame_type = get_irg_frame_type(irg);
5339         int      n          = get_compound_n_members(frame_type);
5340         int      align_all  = 4;
5341         int      offset     = 0;
5342         for (int i = 0; i < n; ++i) {
5343                 ir_entity *member      = get_compound_member(frame_type, i);
5344                 ir_type   *entity_type = get_entity_type(member);
5345
5346                 int align = get_type_alignment_bytes(entity_type);
5347                 if (align > align_all)
5348                         align_all = align;
5349                 int misalign = 0;
5350                 if (align > 0) {
5351                         misalign  = offset % align;
5352                         if (misalign > 0) {
5353                                 offset += align - misalign;
5354                         }
5355                 }
5356
5357                 set_entity_offset(member, offset);
5358                 offset += get_type_size_bytes(entity_type);
5359         }
5360         set_type_size_bytes(frame_type, offset);
5361         set_type_alignment_bytes(frame_type, align_all);
5362
5363         irg_verify(irg, VERIFY_ENFORCE_SSA);
5364         current_vararg_entity = old_current_vararg_entity;
5365         current_function      = old_current_function;
5366
5367         if (current_trampolines != NULL) {
5368                 DEL_ARR_F(current_trampolines);
5369                 current_trampolines = NULL;
5370         }
5371
5372         /* create inner functions if any */
5373         entity_t **inner = inner_functions;
5374         if (inner != NULL) {
5375                 ir_type *rem_outer_frame      = current_outer_frame;
5376                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5377                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5378                         create_function(inner[i]);
5379                 }
5380                 DEL_ARR_F(inner);
5381
5382                 current_outer_frame      = rem_outer_frame;
5383         }
5384 }
5385
5386 static void scope_to_firm(scope_t *scope)
5387 {
5388         /* first pass: create declarations */
5389         entity_t *entity = scope->entities;
5390         for ( ; entity != NULL; entity = entity->base.next) {
5391                 if (entity->base.symbol == NULL)
5392                         continue;
5393
5394                 if (entity->kind == ENTITY_FUNCTION) {
5395                         if (entity->function.btk != BUILTIN_NONE) {
5396                                 /* builtins have no representation */
5397                                 continue;
5398                         }
5399                         (void)get_function_entity(entity, NULL);
5400                 } else if (entity->kind == ENTITY_VARIABLE) {
5401                         create_global_variable(entity);
5402                 } else if (entity->kind == ENTITY_NAMESPACE) {
5403                         scope_to_firm(&entity->namespacee.members);
5404                 }
5405         }
5406
5407         /* second pass: create code/initializers */
5408         entity = scope->entities;
5409         for ( ; entity != NULL; entity = entity->base.next) {
5410                 if (entity->base.symbol == NULL)
5411                         continue;
5412
5413                 if (entity->kind == ENTITY_FUNCTION) {
5414                         if (entity->function.btk != BUILTIN_NONE) {
5415                                 /* builtins have no representation */
5416                                 continue;
5417                         }
5418                         create_function(entity);
5419                 } else if (entity->kind == ENTITY_VARIABLE) {
5420                         assert(entity->declaration.kind
5421                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5422                         current_ir_graph = get_const_code_irg();
5423                         create_variable_initializer(entity);
5424                 }
5425         }
5426 }
5427
5428 void init_ast2firm(void)
5429 {
5430         obstack_init(&asm_obst);
5431         init_atomic_modes();
5432
5433         ir_set_debug_retrieve(dbg_retrieve);
5434         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5435
5436         /* create idents for all known runtime functions */
5437         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5438                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5439         }
5440
5441         entitymap_init(&entitymap);
5442 }
5443
5444 static void init_ir_types(void)
5445 {
5446         static int ir_types_initialized = 0;
5447         if (ir_types_initialized)
5448                 return;
5449         ir_types_initialized = 1;
5450
5451         ir_type_char    = get_ir_type(type_char);
5452         ir_type_wchar_t = get_ir_type(type_wchar_t);
5453
5454         be_params             = be_get_backend_param();
5455         mode_float_arithmetic = be_params->mode_float_arithmetic;
5456
5457         stack_param_align     = be_params->stack_param_align;
5458 }
5459
5460 void exit_ast2firm(void)
5461 {
5462         entitymap_destroy(&entitymap);
5463         obstack_free(&asm_obst, NULL);
5464 }
5465
5466 static void global_asm_to_firm(statement_t *s)
5467 {
5468         for (; s != NULL; s = s->base.next) {
5469                 assert(s->kind == STATEMENT_ASM);
5470
5471                 char const *const text = s->asms.asm_text.begin;
5472                 size_t      const size = s->asms.asm_text.size;
5473                 ident      *const id   = new_id_from_chars(text, size);
5474                 add_irp_asm(id);
5475         }
5476 }
5477
5478 static const char *get_cwd(void)
5479 {
5480         static char buf[1024];
5481         if (buf[0] == '\0') {
5482                 return getcwd(buf, sizeof(buf));
5483         }
5484         return buf;
5485 }
5486
5487 void translation_unit_to_firm(translation_unit_t *unit)
5488 {
5489         if (c_mode & _CXX) {
5490                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5491         } else if (c_mode & _C99) {
5492                 be_dwarf_set_source_language(DW_LANG_C99);
5493         } else if (c_mode & _C89) {
5494                 be_dwarf_set_source_language(DW_LANG_C89);
5495         } else {
5496                 be_dwarf_set_source_language(DW_LANG_C);
5497         }
5498         const char *cwd = get_cwd();
5499         if (cwd != NULL) {
5500                 be_dwarf_set_compilation_directory(cwd);
5501         }
5502
5503         /* initialize firm arithmetic */
5504         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5505         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5506
5507         /* just to be sure */
5508         continue_label           = NULL;
5509         break_label              = NULL;
5510         current_switch           = NULL;
5511         current_translation_unit = unit;
5512
5513         init_ir_types();
5514
5515         scope_to_firm(&unit->scope);
5516         global_asm_to_firm(unit->global_asm);
5517
5518         current_ir_graph         = NULL;
5519         current_translation_unit = NULL;
5520 }