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 <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 typedef struct trampoline_region trampoline_region;
  54 struct trampoline_region {
  55         ir_entity        *function;    /**< The function that is called by this trampoline */
  56         ir_entity        *region;      /**< created region for the trampoline */
  57 };
  58
  59 static const backend_params *be_params;
  60
  61 static ir_type *ir_type_char;
  62 static ir_type *ir_type_const_char;
  63 static ir_type *ir_type_wchar_t;
  64 static ir_type *ir_type_void;
  65 static ir_type *ir_type_int;
  66
  67 /* architecture specific floating point arithmetic mode (if any) */
  68 static ir_mode *mode_float_arithmetic;
  69
  70 /* alignment of stack parameters */
  71 static unsigned stack_param_align;
  72
  73 static int        next_value_number_function;
  74 static ir_node   *continue_label;
  75 static ir_node   *break_label;
  76 static ir_node   *current_switch_cond;
  77 static bool       saw_default_label;
  78 static label_t  **all_labels;
  79 static entity_t **inner_functions;
  80 static ir_node   *ijmp_list;
  81 static bool       constant_folding;
  82
  83 extern bool       have_const_functions;
  84
  85 static const entity_t     *current_function_entity;
  86 static ir_node            *current_function_name;
  87 static ir_node            *current_funcsig;
  88 static switch_statement_t *current_switch;
  89 static ir_graph           *current_function;
  90 static translation_unit_t *current_translation_unit;
  91 static trampoline_region  *current_trampolines;
  92 static ir_type            *current_outer_frame;
  93 static ir_type            *current_outer_value_type;
  94 static ir_node            *current_static_link;
  95
  96 static entitymap_t  entitymap;
  97
  98 static struct obstack asm_obst;
  99
 100 typedef enum declaration_kind_t {
 101         DECLARATION_KIND_UNKNOWN,
 102         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 103         DECLARATION_KIND_GLOBAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 106         DECLARATION_KIND_PARAMETER,
 107         DECLARATION_KIND_PARAMETER_ENTITY,
 108         DECLARATION_KIND_FUNCTION,
 109         DECLARATION_KIND_COMPOUND_MEMBER,
 110         DECLARATION_KIND_INNER_FUNCTION
 111 } declaration_kind_t;
 112
 113 static ir_mode *get_ir_mode_storage(type_t *type);
 114 /*
 115  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 116  * int that it returns bigger modes for floating point on some platforms
 117  * (x87 internally does arithemtic with 80bits)
 118  */
 119 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 120
 121 static ir_type *get_ir_type_incomplete(type_t *type);
 122
 123 static void enqueue_inner_function(entity_t *entity)
 124 {
 125         if (inner_functions == NULL)
 126                 inner_functions = NEW_ARR_F(entity_t *, 0);
 127         ARR_APP1(entity_t*, inner_functions, entity);
 128 }
 129
 130 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 131 {
 132         const entity_t *entity = get_irg_loc_description(irg, pos);
 133
 134         if (entity != NULL) {
 135                 warningf(&entity->base.source_position,
 136                          "%s '%#T' might be used uninitialized",
 137                          get_entity_kind_name(entity->kind),
 138                          entity->declaration.type, entity->base.symbol);
 139         }
 140         return new_r_Unknown(irg, mode);
 141 }
 142
 143 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 144 {
 145         const source_position_t *pos = (const source_position_t*) dbg;
 146         if (pos == NULL)
 147                 return 0;
 148         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 149                                    pos->linenr);
 150 }
 151
 152 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 153 {
 154         const source_position_t *pos = (const source_position_t*) dbg;
 155         if (pos == NULL)
 156                 return NULL;
 157         if (line != NULL)
 158                 *line = pos->linenr;
 159         return pos->input_name;
 160 }
 161
 162 static dbg_info *get_dbg_info(const source_position_t *pos)
 163 {
 164         return (dbg_info*) pos;
 165 }
 166
 167 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 168
 169 static ir_mode *mode_int, *mode_uint;
 170
 171 static ir_node *_expression_to_firm(const expression_t *expression);
 172 static ir_node *expression_to_firm(const expression_t *expression);
 173 static void create_local_declaration(entity_t *entity);
 174
 175 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 176 {
 177         unsigned flags = get_atomic_type_flags(kind);
 178         unsigned size  = get_atomic_type_size(kind);
 179         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 180                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 181                 char            name[64];
 182                 ir_mode_sort    sort;
 183                 unsigned        bit_size     = size * 8;
 184                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 185                 unsigned        modulo_shift;
 186                 ir_mode_arithmetic arithmetic;
 187
 188                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 189                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 190                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 191                                  bit_size);
 192                         sort         = irms_int_number;
 193                         arithmetic   = irma_twos_complement;
 194                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 195                 } else {
 196                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 197                         snprintf(name, sizeof(name), "F%u", bit_size);
 198                         sort         = irms_float_number;
 199                         arithmetic   = irma_ieee754;
 200                         modulo_shift = 0;
 201                 }
 202                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 203                                    modulo_shift);
 204         }
 205
 206         return NULL;
 207 }
 208
 209 /**
 210  * Initialises the atomic modes depending on the machine size.
 211  */
 212 static void init_atomic_modes(void)
 213 {
 214         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 215                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 216         }
 217         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 218         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 219
 220         /* there's no real void type in firm */
 221         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 222
 223         /* initialize pointer modes */
 224         char            name[64];
 225         ir_mode_sort    sort         = irms_reference;
 226         unsigned        bit_size     = machine_size;
 227         bool            is_signed    = 0;
 228         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 229         unsigned        modulo_shift
 230                 = bit_size < machine_size ? machine_size : bit_size;
 231
 232         snprintf(name, sizeof(name), "p%u", machine_size);
 233         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 234                                         modulo_shift);
 235
 236         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 237         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 238
 239         /* Hmm, pointers should be machine size */
 240         set_modeP_data(ptr_mode);
 241         set_modeP_code(ptr_mode);
 242 }
 243
 244 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 245 {
 246         assert(kind <= ATOMIC_TYPE_LAST);
 247         return atomic_modes[kind];
 248 }
 249
 250 static ir_node *get_vla_size(array_type_t *const type)
 251 {
 252         ir_node *size_node = type->size_node;
 253         if (size_node == NULL) {
 254                 size_node = expression_to_firm(type->size_expression);
 255                 type->size_node = size_node;
 256         }
 257         return size_node;
 258 }
 259
 260 /**
 261  * Return a node representing the size of a type.
 262  */
 263 static ir_node *get_type_size_node(type_t *type)
 264 {
 265         type = skip_typeref(type);
 266
 267         if (is_type_array(type) && type->array.is_vla) {
 268                 ir_node *size_node = get_vla_size(&type->array);
 269                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 270                 ir_mode *mode      = get_irn_mode(size_node);
 271                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 272                 return real_size;
 273         }
 274
 275         ir_mode *mode = get_ir_mode_storage(type_size_t);
 276         symconst_symbol sym;
 277         sym.type_p = get_ir_type(type);
 278         return new_SymConst(mode, sym, symconst_type_size);
 279 }
 280
 281 static unsigned count_parameters(const function_type_t *function_type)
 282 {
 283         unsigned count = 0;
 284
 285         function_parameter_t *parameter = function_type->parameters;
 286         for ( ; parameter != NULL; parameter = parameter->next) {
 287                 ++count;
 288         }
 289
 290         return count;
 291 }
 292
 293 /**
 294  * Creates a Firm type for an atomic type
 295  */
 296 static ir_type *create_atomic_type(atomic_type_kind_t akind)
 297 {
 298         ir_mode        *mode      = atomic_modes[akind];
 299         ident          *id        = get_mode_ident(mode);
 300         ir_type        *irtype    = new_type_primitive(id, mode);
 301         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 302
 303         set_type_alignment_bytes(irtype, alignment);
 304
 305         return irtype;
 306 }
 307
 308 /**
 309  * Creates a Firm type for a complex type
 310  */
 311 static ir_type *create_complex_type(const complex_type_t *type)
 312 {
 313         atomic_type_kind_t  kind = type->akind;
 314         ir_mode            *mode = atomic_modes[kind];
 315         ident              *id   = get_mode_ident(mode);
 316
 317         (void) id;
 318
 319         /* FIXME: finish the array */
 320         return NULL;
 321 }
 322
 323 /**
 324  * Creates a Firm type for an imaginary type
 325  */
 326 static ir_type *create_imaginary_type(imaginary_type_t *type)
 327 {
 328         atomic_type_kind_t  kind      = type->akind;
 329         ir_mode            *mode      = atomic_modes[kind];
 330         ident              *id        = get_mode_ident(mode);
 331         ir_type            *irtype    = new_type_primitive(id, mode);
 332         il_alignment_t      alignment = get_type_alignment((type_t*) type);
 333
 334         set_type_alignment_bytes(irtype, alignment);
 335
 336         return irtype;
 337 }
 338
 339 /**
 340  * return type of a parameter (and take transparent union gnu extension into
 341  * account)
 342  */
 343 static type_t *get_parameter_type(type_t *orig_type)
 344 {
 345         type_t *type = skip_typeref(orig_type);
 346         if (is_type_union(type)
 347                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 348                 compound_t *compound = type->compound.compound;
 349                 type                 = compound->members.entities->declaration.type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 356 {
 357         type_t  *return_type  = skip_typeref(function_type->return_type);
 358
 359         ident   *id           = id_unique("functiontype.%u");
 360         int      n_parameters = count_parameters(function_type) + (for_closure ? 1 : 0);
 361         int      n_results    = return_type == type_void ? 0 : 1;
 362         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 363
 364         if (return_type != type_void) {
 365                 ir_type *restype = get_ir_type(return_type);
 366                 set_method_res_type(irtype, 0, restype);
 367         }
 368
 369         function_parameter_t *parameter = function_type->parameters;
 370         int                   n         = 0;
 371         if (for_closure) {
 372                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 373                 set_method_param_type(irtype, n, p_irtype);
 374                 ++n;
 375         }
 376         for ( ; parameter != NULL; parameter = parameter->next) {
 377                 type_t  *type     = get_parameter_type(parameter->type);
 378                 ir_type *p_irtype = get_ir_type(type);
 379                 set_method_param_type(irtype, n, p_irtype);
 380                 ++n;
 381         }
 382
 383         bool is_variadic = function_type->variadic ||
 384                            (function_type->unspecified_parameters && !function_type->prototyped);
 385
 386         if (is_variadic)
 387                 set_method_variadicity(irtype, variadicity_variadic);
 388
 389         unsigned cc = get_method_calling_convention(irtype);
 390         switch (function_type->calling_convention) {
 391         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 392         case CC_CDECL:
 393 is_cdecl:
 394                 set_method_calling_convention(irtype, SET_CDECL(cc));
 395                 break;
 396
 397         case CC_STDCALL:
 398                 if (is_variadic)
 399                         goto is_cdecl;
 400
 401                 /* only non-variadic function can use stdcall, else use cdecl */
 402                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 403                 break;
 404
 405         case CC_FASTCALL:
 406                 if (is_variadic)
 407                         goto is_cdecl;
 408                 /* only non-variadic function can use fastcall, else use cdecl */
 409                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 410                 break;
 411
 412         case CC_THISCALL:
 413                 /* Hmm, leave default, not accepted by the parser yet. */
 414                 break;
 415         }
 416
 417         if (for_closure)
 418                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 419
 420         return irtype;
 421 }
 422
 423 static ir_type *create_pointer_type(pointer_type_t *type)
 424 {
 425         type_t   *points_to    = type->points_to;
 426         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 427         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 428                                                   ir_points_to, mode_P_data);
 429
 430         return ir_type;
 431 }
 432
 433 static ir_type *create_reference_type(reference_type_t *type)
 434 {
 435         type_t  *refers_to    = type->refers_to;
 436         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 437         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 438                                                  ir_refers_to, mode_P_data);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_type *create_array_type(array_type_t *type)
 444 {
 445         type_t  *element_type    = type->element_type;
 446         ir_type *ir_element_type = get_ir_type(element_type);
 447
 448         ident    *id      = id_unique("array.%u");
 449         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 450
 451         const int align = get_type_alignment_bytes(ir_element_type);
 452         set_type_alignment_bytes(ir_type, align);
 453
 454         if (type->size_constant) {
 455                 int n_elements = type->size;
 456
 457                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 458
 459                 size_t elemsize = get_type_size_bytes(ir_element_type);
 460                 if (elemsize % align > 0) {
 461                         elemsize += align - (elemsize % align);
 462                 }
 463                 set_type_size_bytes(ir_type, n_elements * elemsize);
 464         } else {
 465                 set_array_lower_bound_int(ir_type, 0, 0);
 466         }
 467         set_type_state(ir_type, layout_fixed);
 468
 469         return ir_type;
 470 }
 471
 472 /**
 473  * Return the signed integer type of size bits.
 474  *
 475  * @param size   the size
 476  */
 477 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 478                                                  unsigned size)
 479 {
 480         static ir_mode *s_modes[64 + 1] = {NULL, };
 481         ir_type *res;
 482         ir_mode *mode;
 483
 484         if (size <= 0 || size > 64)
 485                 return NULL;
 486
 487         mode = s_modes[size];
 488         if (mode == NULL) {
 489                 char name[32];
 490
 491                 snprintf(name, sizeof(name), "bf_I%u", size);
 492                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 493                                    size <= 32 ? 32 : size );
 494                 s_modes[size] = mode;
 495         }
 496
 497         char name[32];
 498         snprintf(name, sizeof(name), "I%u", size);
 499         ident *id = new_id_from_str(name);
 500         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 501         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 502         set_primitive_base_type(res, base_tp);
 503
 504         return res;
 505 }
 506
 507 /**
 508  * Return the unsigned integer type of size bits.
 509  *
 510  * @param size   the size
 511  */
 512 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 513                                                    unsigned size)
 514 {
 515         static ir_mode *u_modes[64 + 1] = {NULL, };
 516         ir_type *res;
 517         ir_mode *mode;
 518
 519         if (size <= 0 || size > 64)
 520                 return NULL;
 521
 522         mode = u_modes[size];
 523         if (mode == NULL) {
 524                 char name[32];
 525
 526                 snprintf(name, sizeof(name), "bf_U%u", size);
 527                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 528                                    size <= 32 ? 32 : size );
 529                 u_modes[size] = mode;
 530         }
 531
 532         char name[32];
 533
 534         snprintf(name, sizeof(name), "U%u", size);
 535         ident *id = new_id_from_str(name);
 536         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 537         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 538         set_primitive_base_type(res, base_tp);
 539
 540         return res;
 541 }
 542
 543 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 544 {
 545         type_t *base = skip_typeref(type->base_type);
 546         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 547         ir_type *irbase = get_ir_type(base);
 548
 549         unsigned size = type->bit_size;
 550
 551         assert(!is_type_float(base));
 552         if (is_type_signed(base)) {
 553                 return get_signed_int_type_for_bit_size(irbase, size);
 554         } else {
 555                 return get_unsigned_int_type_for_bit_size(irbase, size);
 556         }
 557 }
 558
 559 #define INVALID_TYPE ((ir_type_ptr)-1)
 560
 561 enum {
 562         COMPOUND_IS_STRUCT = false,
 563         COMPOUND_IS_UNION  = true
 564 };
 565
 566 /**
 567  * Construct firm type from ast struct type.
 568  */
 569 static ir_type *create_compound_type(compound_type_t *type,
 570                                      bool incomplete, bool is_union)
 571 {
 572         compound_t *compound = type->compound;
 573
 574         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 575                 return compound->irtype;
 576         }
 577
 578         symbol_t *symbol = compound->base.symbol;
 579         ident    *id;
 580         if (symbol != NULL) {
 581                 id = new_id_from_str(symbol->string);
 582         } else {
 583                 if (is_union) {
 584                         id = id_unique("__anonymous_union.%u");
 585                 } else {
 586                         id = id_unique("__anonymous_struct.%u");
 587                 }
 588         }
 589         dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 590
 591         ir_type *irtype;
 592         if (is_union) {
 593                 irtype = new_d_type_union(id, dbgi);
 594         } else {
 595                 irtype = new_d_type_struct(id, dbgi);
 596         }
 597
 598         compound->irtype_complete = false;
 599         compound->irtype          = irtype;
 600
 601         if (incomplete)
 602                 return irtype;
 603
 604         if (is_union) {
 605                 layout_union_type(type);
 606         } else {
 607                 layout_struct_type(type);
 608         }
 609
 610         compound->irtype_complete = true;
 611
 612         entity_t *entry = compound->members.entities;
 613         for ( ; entry != NULL; entry = entry->base.next) {
 614                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 615                         continue;
 616
 617                 symbol_t *symbol     = entry->base.symbol;
 618                 type_t   *entry_type = entry->declaration.type;
 619                 ident    *ident;
 620                 if (symbol == NULL) {
 621                         /* anonymous bitfield member, skip */
 622                         if (entry_type->kind == TYPE_BITFIELD)
 623                                 continue;
 624                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 625                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 626                         ident = id_unique("anon.%u");
 627                 } else {
 628                         ident = new_id_from_str(symbol->string);
 629                 }
 630
 631                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 632
 633                 ir_type   *entry_irtype = get_ir_type(entry_type);
 634                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 635
 636                 set_entity_offset(entity, entry->compound_member.offset);
 637                 set_entity_offset_bits_remainder(entity,
 638                                                  entry->compound_member.bit_offset);
 639
 640                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 641                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 642                 entry->compound_member.entity = entity;
 643         }
 644
 645         set_type_alignment_bytes(irtype, compound->alignment);
 646         set_type_size_bytes(irtype, compound->size);
 647         set_type_state(irtype, layout_fixed);
 648
 649         return irtype;
 650 }
 651
 652 static ir_type *create_enum_type(enum_type_t *const type)
 653 {
 654         type->base.firm_type = ir_type_int;
 655
 656         ir_mode *const mode    = mode_int;
 657         tarval  *const one     = get_mode_one(mode);
 658         tarval  *      tv_next = get_tarval_null(mode);
 659
 660         bool constant_folding_old = constant_folding;
 661         constant_folding = true;
 662
 663         enum_t   *enume = type->enume;
 664         entity_t *entry = enume->base.next;
 665         for (; entry != NULL; entry = entry->base.next) {
 666                 if (entry->kind != ENTITY_ENUM_VALUE)
 667                         break;
 668
 669                 expression_t *const init = entry->enum_value.value;
 670                 if (init != NULL) {
 671                         ir_node *const cnst = expression_to_firm(init);
 672                         if (!is_Const(cnst)) {
 673                                 panic("couldn't fold constant");
 674                         }
 675                         tv_next = get_Const_tarval(cnst);
 676                 }
 677                 entry->enum_value.tv = tv_next;
 678                 tv_next = tarval_add(tv_next, one);
 679         }
 680
 681         constant_folding = constant_folding_old;
 682
 683         return create_atomic_type(type->akind);
 684 }
 685
 686 static ir_type *get_ir_type_incomplete(type_t *type)
 687 {
 688         assert(type != NULL);
 689         type = skip_typeref(type);
 690
 691         if (type->base.firm_type != NULL) {
 692                 assert(type->base.firm_type != INVALID_TYPE);
 693                 return type->base.firm_type;
 694         }
 695
 696         switch (type->kind) {
 697         case TYPE_COMPOUND_STRUCT:
 698                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 699         case TYPE_COMPOUND_UNION:
 700                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 701         default:
 702                 return get_ir_type(type);
 703         }
 704 }
 705
 706 ir_type *get_ir_type(type_t *type)
 707 {
 708         assert(type != NULL);
 709
 710         type = skip_typeref(type);
 711
 712         if (type->base.firm_type != NULL) {
 713                 assert(type->base.firm_type != INVALID_TYPE);
 714                 return type->base.firm_type;
 715         }
 716
 717         ir_type *firm_type = NULL;
 718         switch (type->kind) {
 719         case TYPE_ERROR:
 720                 /* Happens while constant folding, when there was an error */
 721                 return create_atomic_type(ATOMIC_TYPE_VOID);
 722
 723         case TYPE_ATOMIC:
 724                 firm_type = create_atomic_type(type->atomic.akind);
 725                 break;
 726         case TYPE_COMPLEX:
 727                 firm_type = create_complex_type(&type->complex);
 728                 break;
 729         case TYPE_IMAGINARY:
 730                 firm_type = create_imaginary_type(&type->imaginary);
 731                 break;
 732         case TYPE_FUNCTION:
 733                 firm_type = create_method_type(&type->function, false);
 734                 break;
 735         case TYPE_POINTER:
 736                 firm_type = create_pointer_type(&type->pointer);
 737                 break;
 738         case TYPE_REFERENCE:
 739                 firm_type = create_reference_type(&type->reference);
 740                 break;
 741         case TYPE_ARRAY:
 742                 firm_type = create_array_type(&type->array);
 743                 break;
 744         case TYPE_COMPOUND_STRUCT:
 745                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 746                 break;
 747         case TYPE_COMPOUND_UNION:
 748                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 749                 break;
 750         case TYPE_ENUM:
 751                 firm_type = create_enum_type(&type->enumt);
 752                 break;
 753         case TYPE_BUILTIN:
 754                 firm_type = get_ir_type(type->builtin.real_type);
 755                 break;
 756         case TYPE_BITFIELD:
 757                 firm_type = create_bitfield_type(&type->bitfield);
 758                 break;
 759
 760         case TYPE_TYPEOF:
 761         case TYPE_TYPEDEF:
 762         case TYPE_INVALID:
 763                 break;
 764         }
 765         if (firm_type == NULL)
 766                 panic("unknown type found");
 767
 768         type->base.firm_type = firm_type;
 769         return firm_type;
 770 }
 771
 772 static ir_mode *get_ir_mode_storage(type_t *type)
 773 {
 774         ir_type *irtype = get_ir_type(type);
 775
 776         /* firm doesn't report a mode for arrays somehow... */
 777         if (is_Array_type(irtype)) {
 778                 return mode_P_data;
 779         }
 780
 781         ir_mode *mode = get_type_mode(irtype);
 782         assert(mode != NULL);
 783         return mode;
 784 }
 785
 786 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 787 {
 788         ir_mode *mode = get_ir_mode_storage(type);
 789         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 790                 return mode_float_arithmetic;
 791         }
 792
 793         return mode;
 794 }
 795
 796 /** Names of the runtime functions. */
 797 static const struct {
 798         int        id;           /**< the rts id */
 799         int        n_res;        /**< number of return values */
 800         const char *name;        /**< the name of the rts function */
 801         int        n_params;     /**< number of parameters */
 802         unsigned   flags;        /**< language flags */
 803 } rts_data[] = {
 804         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 805         { rts_abort,      0, "abort",        0, _C89 },
 806         { rts_alloca,     1, "alloca",       1, _ALL },
 807         { rts_abs,        1, "abs",          1, _C89 },
 808         { rts_labs,       1, "labs",         1, _C89 },
 809         { rts_llabs,      1, "llabs",        1, _C99 },
 810         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 811
 812         { rts_fabs,       1, "fabs",         1, _C89 },
 813         { rts_sqrt,       1, "sqrt",         1, _C89 },
 814         { rts_cbrt,       1, "cbrt",         1, _C99 },
 815         { rts_exp,        1, "exp",          1, _C89 },
 816         { rts_exp2,       1, "exp2",         1, _C89 },
 817         { rts_exp10,      1, "exp10",        1, _GNUC },
 818         { rts_log,        1, "log",          1, _C89 },
 819         { rts_log2,       1, "log2",         1, _C89 },
 820         { rts_log10,      1, "log10",        1, _C89 },
 821         { rts_pow,        1, "pow",          2, _C89 },
 822         { rts_sin,        1, "sin",          1, _C89 },
 823         { rts_cos,        1, "cos",          1, _C89 },
 824         { rts_tan,        1, "tan",          1, _C89 },
 825         { rts_asin,       1, "asin",         1, _C89 },
 826         { rts_acos,       1, "acos",         1, _C89 },
 827         { rts_atan,       1, "atan",         1, _C89 },
 828         { rts_sinh,       1, "sinh",         1, _C89 },
 829         { rts_cosh,       1, "cosh",         1, _C89 },
 830         { rts_tanh,       1, "tanh",         1, _C89 },
 831
 832         { rts_fabsf,      1, "fabsf",        1, _C99 },
 833         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 834         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 835         { rts_expf,       1, "expf",         1, _C99 },
 836         { rts_exp2f,      1, "exp2f",        1, _C99 },
 837         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 838         { rts_logf,       1, "logf",         1, _C99 },
 839         { rts_log2f,      1, "log2f",        1, _C99 },
 840         { rts_log10f,     1, "log10f",       1, _C99 },
 841         { rts_powf,       1, "powf",         2, _C99 },
 842         { rts_sinf,       1, "sinf",         1, _C99 },
 843         { rts_cosf,       1, "cosf",         1, _C99 },
 844         { rts_tanf,       1, "tanf",         1, _C99 },
 845         { rts_asinf,      1, "asinf",        1, _C99 },
 846         { rts_acosf,      1, "acosf",        1, _C99 },
 847         { rts_atanf,      1, "atanf",        1, _C99 },
 848         { rts_sinhf,      1, "sinhf",        1, _C99 },
 849         { rts_coshf,      1, "coshf",        1, _C99 },
 850         { rts_tanhf,      1, "tanhf",        1, _C99 },
 851
 852         { rts_fabsl,      1, "fabsl",        1, _C99 },
 853         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 854         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 855         { rts_expl,       1, "expl",         1, _C99 },
 856         { rts_exp2l,      1, "exp2l",        1, _C99 },
 857         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 858         { rts_logl,       1, "logl",         1, _C99 },
 859         { rts_log2l,      1, "log2l",        1, _C99 },
 860         { rts_log10l,     1, "log10l",       1, _C99 },
 861         { rts_powl,       1, "powl",         2, _C99 },
 862         { rts_sinl,       1, "sinl",         1, _C99 },
 863         { rts_cosl,       1, "cosl",         1, _C99 },
 864         { rts_tanl,       1, "tanl",         1, _C99 },
 865         { rts_asinl,      1, "asinl",        1, _C99 },
 866         { rts_acosl,      1, "acosl",        1, _C99 },
 867         { rts_atanl,      1, "atanl",        1, _C99 },
 868         { rts_sinhl,      1, "sinhl",        1, _C99 },
 869         { rts_coshl,      1, "coshl",        1, _C99 },
 870         { rts_tanhl,      1, "tanhl",        1, _C99 },
 871
 872         { rts_strcmp,     1, "strcmp",       2, _C89 },
 873         { rts_strncmp,    1, "strncmp",      3, _C89 },
 874         { rts_strcpy,     1, "strcpy",       2, _C89 },
 875         { rts_strlen,     1, "strlen",       1, _C89 },
 876         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 877         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 878         { rts_memmove,    1, "memmove",      3, _C89 },  /* HMM, man say its C99 */
 879         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 880         { rts_memcmp,     1, "memcmp",       3, _C89 },  /* HMM, man say its C99 */
 881 };
 882
 883 static ident *rts_idents[lengthof(rts_data)];
 884
 885 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 886
 887 /**
 888  * Handle GNU attributes for entities
 889  *
 890  * @param ent   the entity
 891  * @param decl  the routine declaration
 892  */
 893 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 894 {
 895         assert(is_declaration(entity));
 896         decl_modifiers_t modifiers = entity->declaration.modifiers;
 897         if (modifiers & DM_PURE) {
 898                 /* TRUE if the declaration includes the GNU
 899                    __attribute__((pure)) specifier. */
 900                 set_entity_additional_property(irentity, mtp_property_pure);
 901         }
 902         if (modifiers & DM_CONST) {
 903                 set_entity_additional_property(irentity, mtp_property_const);
 904                 have_const_functions = true;
 905         }
 906         if (modifiers & DM_USED) {
 907                 /* TRUE if the declaration includes the GNU
 908                    __attribute__((used)) specifier. */
 909                 set_entity_stickyness(irentity, stickyness_sticky);
 910         }
 911 }
 912
 913 static bool is_main(entity_t *entity)
 914 {
 915         static symbol_t *sym_main = NULL;
 916         if (sym_main == NULL) {
 917                 sym_main = symbol_table_insert("main");
 918         }
 919
 920         if (entity->base.symbol != sym_main)
 921                 return false;
 922         /* must be in outermost scope */
 923         if (entity->base.parent_scope != &current_translation_unit->scope)
 924                 return false;
 925
 926         return true;
 927 }
 928
 929 /**
 930  * Creates an entity representing a function.
 931  *
 932  * @param declaration  the function declaration
 933  * @param owner_type   the owner type of this function, NULL
 934  *                     for global functions
 935  */
 936 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 937 {
 938         assert(entity->kind == ENTITY_FUNCTION);
 939         if (entity->function.irentity != NULL) {
 940                 return entity->function.irentity;
 941         }
 942
 943         if (is_main(entity)) {
 944                 /* force main to C linkage */
 945                 type_t *type = entity->declaration.type;
 946                 assert(is_type_function(type));
 947                 if (type->function.linkage != LINKAGE_C) {
 948                         type_t *new_type           = duplicate_type(type);
 949                         new_type->function.linkage = LINKAGE_C;
 950                         type                       = identify_new_type(new_type);
 951                         entity->declaration.type   = type;
 952                 }
 953         }
 954
 955         symbol_t *symbol = entity->base.symbol;
 956         ident    *id     = new_id_from_str(symbol->string);
 957
 958
 959         /* already an entity defined? */
 960         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 961         bool const has_body = entity->function.statement != NULL;
 962         if (irentity != NULL) {
 963                 if (get_entity_visibility(irentity) == visibility_external_allocated
 964                                 && has_body) {
 965                         set_entity_visibility(irentity, visibility_external_visible);
 966                 }
 967                 goto entity_created;
 968         }
 969
 970         ir_type *ir_type_method;
 971         if (entity->function.need_closure)
 972                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 973         else
 974                 ir_type_method = get_ir_type(entity->declaration.type);
 975
 976         bool nested_function = false;
 977         if (owner_type == NULL)
 978                 owner_type = get_glob_type();
 979         else
 980                 nested_function = true;
 981
 982         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 983         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 984
 985         ident *ld_id;
 986         if (nested_function)
 987                 ld_id = id_unique("inner.%u");
 988         else
 989                 ld_id = create_ld_ident(entity);
 990         set_entity_ld_ident(irentity, ld_id);
 991
 992         handle_decl_modifiers(irentity, entity);
 993
 994         if (! nested_function) {
 995                 /* static inline             => local
 996                  * extern inline             => local
 997                  * inline without definition => local
 998                  * inline with definition    => external_visible */
 999                 storage_class_tag_t const storage_class
1000                         = (storage_class_tag_t) entity->declaration.storage_class;
1001                 bool                const is_inline     = entity->function.is_inline;
1002
1003                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1004                         set_entity_visibility(irentity, visibility_external_visible);
1005                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1006                            (is_inline && has_body)) {
1007                         if (!has_body) {
1008                                 /* this entity was declared, but is defined nowhere */
1009                                 set_entity_peculiarity(irentity, peculiarity_description);
1010                         }
1011                         set_entity_visibility(irentity, visibility_local);
1012                 } else if (has_body) {
1013                         set_entity_visibility(irentity, visibility_external_visible);
1014                 } else {
1015                         set_entity_visibility(irentity, visibility_external_allocated);
1016                 }
1017         } else {
1018                 /* nested functions are always local */
1019                 set_entity_visibility(irentity, visibility_local);
1020         }
1021         set_entity_allocation(irentity, allocation_static);
1022
1023         /* We should check for file scope here, but as long as we compile C only
1024            this is not needed. */
1025         if (! firm_opt.freestanding && !has_body) {
1026                 /* check for a known runtime function */
1027                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1028                         if (id != rts_idents[i])
1029                                 continue;
1030
1031                         /* ignore those rts functions not necessary needed for current mode */
1032                         if ((c_mode & rts_data[i].flags) == 0)
1033                                 continue;
1034                         assert(rts_entities[rts_data[i].id] == NULL);
1035                         rts_entities[rts_data[i].id] = irentity;
1036                 }
1037         }
1038
1039         entitymap_insert(&entitymap, symbol, irentity);
1040
1041 entity_created:
1042         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1043         entity->function.irentity = irentity;
1044
1045         return irentity;
1046 }
1047
1048 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1049 {
1050         ir_mode *value_mode = get_irn_mode(value);
1051
1052         if (value_mode == dest_mode || is_Bad(value))
1053                 return value;
1054
1055         if (dest_mode == mode_b) {
1056                 ir_node *zero = new_Const(get_mode_null(value_mode));
1057                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1058                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1059                 return proj;
1060         }
1061
1062         return new_d_Conv(dbgi, value, dest_mode);
1063 }
1064
1065 /**
1066  * Creates a Const node representing a constant.
1067  */
1068 static ir_node *const_to_firm(const const_expression_t *cnst)
1069 {
1070         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1071         type_t   *type = skip_typeref(cnst->base.type);
1072         ir_mode  *mode = get_ir_mode_storage(type);
1073
1074         char    buf[128];
1075         tarval *tv;
1076         size_t  len;
1077         if (mode_is_float(mode)) {
1078                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1079         } else {
1080                 if (mode_is_signed(mode)) {
1081                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1082                 } else {
1083                         len = snprintf(buf, sizeof(buf), "%llu",
1084                                        (unsigned long long) cnst->v.int_value);
1085                 }
1086                 tv = new_tarval_from_str(buf, len, mode);
1087         }
1088
1089         ir_node *res        = new_d_Const(dbgi, tv);
1090         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1091         return create_conv(dbgi, res, mode_arith);
1092 }
1093
1094 /**
1095  * Creates a Const node representing a character constant.
1096  */
1097 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1098 {
1099         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1100         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1101
1102         long long int v;
1103         size_t const  size = cnst->v.character.size;
1104         if (size == 1 && char_is_signed) {
1105                 v = (signed char)cnst->v.character.begin[0];
1106         } else {
1107                 v = 0;
1108                 for (size_t i = 0; i < size; ++i) {
1109                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1110                 }
1111         }
1112         char    buf[128];
1113         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1114         tarval *tv = new_tarval_from_str(buf, len, mode);
1115
1116         return new_d_Const(dbgi, tv);
1117 }
1118
1119 /**
1120  * Creates a Const node representing a wide character constant.
1121  */
1122 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1123 {
1124         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1125         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1126
1127         long long int v = cnst->v.wide_character.begin[0];
1128
1129         char    buf[128];
1130         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1131         tarval *tv = new_tarval_from_str(buf, len, mode);
1132
1133         return new_d_Const(dbgi, tv);
1134 }
1135
1136 /*
1137  * Allocate an area of size bytes aligned at alignment
1138  * at a frame type.
1139  */
1140 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment) {
1141         static unsigned area_cnt = 0;
1142         char buf[32];
1143
1144         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1145         ident *name = new_id_from_str(buf);
1146
1147         ir_type *tp = new_type_array(id_mangle_u(get_type_ident(frame_type), name), 1, ir_type_char);
1148         set_array_bounds_int(tp, 0, 0, size);
1149         set_type_alignment_bytes(tp, alignment);
1150
1151         ir_entity *area = new_entity(frame_type, name, tp);
1152
1153         /* mark this entity as compiler generated */
1154         set_entity_compiler_generated(area, 1);
1155         return area;
1156 }
1157
1158 /**
1159  * Return a node representing a trampoline reagion
1160  * for a given entity.
1161  *
1162  * @param dbgi    debug info
1163  * @param entity  the entity
1164  */
1165 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1166 {
1167         ir_entity *region = NULL;
1168         int        i;
1169
1170         if (current_trampolines != NULL) {
1171                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1172                         if (current_trampolines[i].function == entity) {
1173                                 region = current_trampolines[i].region;
1174                                 break;
1175                         }
1176                 }
1177         } else {
1178                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1179         }
1180         ir_graph *irg = current_ir_graph;
1181         if (region == NULL) {
1182                 /* create a new region */
1183                 ir_type           *frame_tp = get_irg_frame_type(irg);
1184                 trampoline_region  reg;
1185                 reg.function = entity;
1186
1187                 reg.region   = alloc_trampoline(frame_tp,
1188                                                 be_params->trampoline_size,
1189                                                 be_params->trampoline_align);
1190                 ARR_APP1(trampoline_region, current_trampolines, reg);
1191                 region = reg.region;
1192         }
1193         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1194                                region);
1195 }
1196
1197
1198 /**
1199  * Creates a SymConst for a given entity.
1200  *
1201  * @param dbgi    debug info
1202  * @param mode    the (reference) mode for the SymConst
1203  * @param entity  the entity
1204  */
1205 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1206                                 ir_entity *entity)
1207 {
1208         assert(entity != NULL);
1209         union symconst_symbol sym;
1210         sym.entity_p = entity;
1211         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1212 }
1213
1214 /**
1215  * Creates a SymConst for a given trampoline of an entity.
1216  *
1217  * @param dbgi    debug info
1218  * @param mode    the (reference) mode for the SymConst
1219  * @param entity  the entity
1220  */
1221 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1222                                   ir_entity *entity)
1223 {
1224         assert(entity != NULL);
1225         ir_node *in[3];
1226         in[0] = get_trampoline_region(dbgi, entity);
1227         in[1] = create_symconst(dbgi, mode, entity);
1228         in[2] = get_irg_frame(current_ir_graph);
1229
1230         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1231         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1232         return new_Proj(irn, mode, pn_Builtin_1_result);
1233 }
1234
1235 /**
1236  * Creates a SymConst node representing a string constant.
1237  *
1238  * @param src_pos    the source position of the string constant
1239  * @param id_prefix  a prefix for the name of the generated string constant
1240  * @param value      the value of the string constant
1241  */
1242 static ir_node *string_to_firm(const source_position_t *const src_pos,
1243                                const char *const id_prefix,
1244                                const string_t *const value)
1245 {
1246         ir_type  *const global_type = get_glob_type();
1247         dbg_info *const dbgi        = get_dbg_info(src_pos);
1248         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1249                                                        ir_type_const_char, dbgi);
1250
1251         ident     *const id     = id_unique(id_prefix);
1252         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1253         set_entity_ld_ident(entity, id);
1254         set_entity_variability(entity, variability_constant);
1255         set_entity_allocation(entity, allocation_static);
1256         set_entity_visibility(entity, visibility_local);
1257
1258         ir_type *const elem_type = ir_type_const_char;
1259         ir_mode *const mode      = get_type_mode(elem_type);
1260
1261         const char* const string = value->begin;
1262         const size_t      slen   = value->size;
1263
1264         set_array_lower_bound_int(type, 0, 0);
1265         set_array_upper_bound_int(type, 0, slen);
1266         set_type_size_bytes(type, slen);
1267         set_type_state(type, layout_fixed);
1268
1269         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1270         for (size_t i = 0; i < slen; ++i) {
1271                 tvs[i] = new_tarval_from_long(string[i], mode);
1272         }
1273
1274         set_array_entity_values(entity, tvs, slen);
1275         free(tvs);
1276
1277         return create_symconst(dbgi, mode_P_data, entity);
1278 }
1279
1280 /**
1281  * Creates a SymConst node representing a string literal.
1282  *
1283  * @param literal   the string literal
1284  */
1285 static ir_node *string_literal_to_firm(
1286                 const string_literal_expression_t* literal)
1287 {
1288         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1289                               &literal->value);
1290 }
1291
1292 /**
1293  * Creates a SymConst node representing a wide string literal.
1294  *
1295  * @param literal   the wide string literal
1296  */
1297 static ir_node *wide_string_literal_to_firm(
1298         const wide_string_literal_expression_t* const literal)
1299 {
1300         ir_type *const global_type = get_glob_type();
1301         ir_type *const elem_type   = ir_type_wchar_t;
1302         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1303         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1304                                                     elem_type, dbgi);
1305
1306         ident     *const id     = id_unique("Lstr.%u");
1307         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1308         set_entity_ld_ident(entity, id);
1309         set_entity_variability(entity, variability_constant);
1310         set_entity_allocation(entity, allocation_static);
1311
1312         ir_mode *const mode      = get_type_mode(elem_type);
1313
1314         const wchar_rep_t *const string = literal->value.begin;
1315         const size_t             slen   = literal->value.size;
1316
1317         set_array_lower_bound_int(type, 0, 0);
1318         set_array_upper_bound_int(type, 0, slen);
1319         set_type_size_bytes(type, slen);
1320         set_type_state(type, layout_fixed);
1321
1322         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1323         for (size_t i = 0; i < slen; ++i) {
1324                 tvs[i] = new_tarval_from_long(string[i], mode);
1325         }
1326
1327         set_array_entity_values(entity, tvs, slen);
1328         free(tvs);
1329
1330         return create_symconst(dbgi, mode_P_data, entity);
1331 }
1332
1333 /**
1334  * Dereference an address.
1335  *
1336  * @param dbgi  debug info
1337  * @param type  the type of the dereferenced result (the points_to type)
1338  * @param addr  the address to dereference
1339  */
1340 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1341                                       ir_node *const addr)
1342 {
1343         ir_type *irtype = get_ir_type(type);
1344         if (is_compound_type(irtype)
1345                         || is_Method_type(irtype)
1346                         || is_Array_type(irtype)) {
1347                 return addr;
1348         }
1349
1350         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1351                                   ? cons_volatile : cons_none;
1352         ir_mode *const mode     = get_type_mode(irtype);
1353         ir_node *const memory   = get_store();
1354         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1355         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1356         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1357
1358         set_store(load_mem);
1359
1360         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1361         return create_conv(dbgi, load_res, mode_arithmetic);
1362 }
1363
1364 /**
1365  * Creates a strict Conv (to the node's mode) if necessary.
1366  *
1367  * @param dbgi  debug info
1368  * @param node  the node to strict conv
1369  */
1370 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1371 {
1372         ir_mode *mode = get_irn_mode(node);
1373
1374         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1375                 return node;
1376         if (!mode_is_float(mode))
1377                 return node;
1378
1379         /* check if there is already a Conv */
1380         if (is_Conv(node)) {
1381                 /* convert it into a strict Conv */
1382                 set_Conv_strict(node, 1);
1383                 return node;
1384         }
1385
1386         /* otherwise create a new one */
1387         return new_d_strictConv(dbgi, node, mode);
1388 }
1389
1390 /**
1391  * Returns the address of a global variable.
1392  *
1393  * @param dbgi      debug info
1394  * @param variable  the variable
1395  */
1396 static ir_node *get_global_var_address(dbg_info *const dbgi,
1397                                        const variable_t *const variable)
1398 {
1399         ir_entity *const irentity = variable->v.entity;
1400         if (variable->thread_local) {
1401                 ir_node *const no_mem = new_NoMem();
1402                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1403                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1404         } else {
1405                 return create_symconst(dbgi, mode_P_data, irentity);
1406         }
1407 }
1408
1409 /**
1410  * Returns the correct base address depending on whether it is a parameter or a
1411  * normal local variable.
1412  */
1413 static ir_node *get_local_frame(ir_entity *const ent)
1414 {
1415         ir_graph      *const irg   = current_ir_graph;
1416         const ir_type *const owner = get_entity_owner(ent);
1417         if (owner == current_outer_frame || owner == current_outer_value_type) {
1418                 assert(current_static_link != NULL);
1419                 return current_static_link;
1420         } else {
1421                 return get_irg_frame(irg);
1422         }
1423 }
1424
1425 /**
1426  * Keep all memory edges of the given block.
1427  */
1428 static void keep_all_memory(ir_node *block)
1429 {
1430         ir_node *old = get_cur_block();
1431
1432         set_cur_block(block);
1433         keep_alive(get_store());
1434         /* TODO: keep all memory edges from restricted pointers */
1435         set_cur_block(old);
1436 }
1437
1438 static ir_node *reference_expression_enum_value_to_firm(
1439                 const reference_expression_t *ref)
1440 {
1441         entity_t *entity = ref->entity;
1442         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1443         /* make sure the type is constructed */
1444         (void) get_ir_type(type);
1445
1446         return new_Const(entity->enum_value.tv);
1447 }
1448
1449 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1450 {
1451         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1452         entity_t *entity = ref->entity;
1453         assert(is_declaration(entity));
1454         type_t   *type   = skip_typeref(entity->declaration.type);
1455
1456         /* make sure the type is constructed */
1457         (void) get_ir_type(type);
1458
1459         switch ((declaration_kind_t) entity->declaration.kind) {
1460         case DECLARATION_KIND_UNKNOWN:
1461                 break;
1462
1463         case DECLARATION_KIND_LOCAL_VARIABLE: {
1464                 ir_mode *const mode  = get_ir_mode_storage(type);
1465                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1466                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1467         }
1468         case DECLARATION_KIND_PARAMETER: {
1469                 ir_mode *const mode  = get_ir_mode_storage(type);
1470                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1471                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1472         }
1473         case DECLARATION_KIND_FUNCTION: {
1474                 ir_mode *const mode = get_ir_mode_storage(type);
1475
1476                 if (entity->function.btk != bk_none) {
1477                         /* for gcc compatibility we have to produce (dummy) addresses for some
1478                          * builtins */
1479                         if (warning.other) {
1480                                 warningf(&ref->base.source_position,
1481                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1482                         }
1483
1484                         /* simply create a NULL pointer */
1485                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1486                         ir_node  *res  = new_Const_long(mode, 0);
1487
1488                         return res;
1489                 }
1490                 return create_symconst(dbgi, mode, entity->function.irentity);
1491         }
1492         case DECLARATION_KIND_INNER_FUNCTION: {
1493                 ir_mode *const mode = get_ir_mode_storage(type);
1494                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1495                         /* inner function not using the closure */
1496                         return create_symconst(dbgi, mode, entity->function.irentity);
1497                 } else {
1498                         /* need trampoline here */
1499                         return create_trampoline(dbgi, mode, entity->function.irentity);
1500                 }
1501         }
1502         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1503                 const variable_t *variable = &entity->variable;
1504                 ir_node *const addr = get_global_var_address(dbgi, variable);
1505                 return deref_address(dbgi, variable->base.type, addr);
1506         }
1507
1508         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1509                 ir_entity *irentity = entity->variable.v.entity;
1510                 ir_node   *frame    = get_local_frame(irentity);
1511                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1512                 return deref_address(dbgi, entity->declaration.type, sel);
1513         }
1514         case DECLARATION_KIND_PARAMETER_ENTITY: {
1515                 ir_entity *irentity = entity->parameter.v.entity;
1516                 ir_node   *frame    = get_local_frame(irentity);
1517                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518                 return deref_address(dbgi, entity->declaration.type, sel);
1519         }
1520
1521         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1522                 return entity->variable.v.vla_base;
1523
1524         case DECLARATION_KIND_COMPOUND_MEMBER:
1525                 panic("not implemented reference type");
1526         }
1527
1528         panic("reference to declaration with unknown type found");
1529 }
1530
1531 static ir_node *reference_addr(const reference_expression_t *ref)
1532 {
1533         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1534         entity_t *entity = ref->entity;
1535         assert(is_declaration(entity));
1536
1537         switch((declaration_kind_t) entity->declaration.kind) {
1538         case DECLARATION_KIND_UNKNOWN:
1539                 break;
1540         case DECLARATION_KIND_PARAMETER:
1541         case DECLARATION_KIND_LOCAL_VARIABLE:
1542                 /* you can store to a local variable (so we don't panic but return NULL
1543                  * as an indicator for no real address) */
1544                 return NULL;
1545         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1546                 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1547                 return addr;
1548         }
1549         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1550                 ir_entity *irentity = entity->variable.v.entity;
1551                 ir_node   *frame    = get_local_frame(irentity);
1552                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1553
1554                 return sel;
1555         }
1556         case DECLARATION_KIND_PARAMETER_ENTITY: {
1557                 ir_entity *irentity = entity->parameter.v.entity;
1558                 ir_node   *frame    = get_local_frame(irentity);
1559                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1560
1561                 return sel;
1562         }
1563
1564         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1565                 return entity->variable.v.vla_base;
1566
1567         case DECLARATION_KIND_FUNCTION: {
1568                 type_t  *const type = skip_typeref(entity->declaration.type);
1569                 ir_mode *const mode = get_ir_mode_storage(type);
1570                 return create_symconst(dbgi, mode, entity->function.irentity);
1571         }
1572
1573         case DECLARATION_KIND_INNER_FUNCTION: {
1574                 type_t  *const type = skip_typeref(entity->declaration.type);
1575                 ir_mode *const mode = get_ir_mode_storage(type);
1576                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1577                         /* inner function not using the closure */
1578                         return create_symconst(dbgi, mode, entity->function.irentity);
1579                 } else {
1580                         /* need trampoline here */
1581                         return create_trampoline(dbgi, mode, entity->function.irentity);
1582                 }
1583         }
1584
1585         case DECLARATION_KIND_COMPOUND_MEMBER:
1586                 panic("not implemented reference type");
1587         }
1588
1589         panic("reference to declaration with unknown type found");
1590 }
1591
1592 /**
1593  * Generate an unary builtin.
1594  *
1595  * @param kind           the builtin kind to generate
1596  * @param op             the operand
1597  * @param function_type  the function type for the GNU builtin routine
1598  * @param db             debug info
1599  */
1600 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1601 {
1602         ir_node *in[1];
1603         in[0] = expression_to_firm(op);
1604
1605         ir_type *tp  = get_ir_type(function_type);
1606         ir_type *res = get_method_res_type(tp, 0);
1607         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1608         set_irn_pinned(irn, op_pin_state_floats);
1609         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1610 }
1611
1612 /**
1613  * Generate a pinned unary builtin.
1614  *
1615  * @param kind           the builtin kind to generate
1616  * @param op             the operand
1617  * @param function_type  the function type for the GNU builtin routine
1618  * @param db             debug info
1619  */
1620 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1621 {
1622         ir_node *in[1];
1623         in[0] = expression_to_firm(op);
1624
1625         ir_type *tp  = get_ir_type(function_type);
1626         ir_type *res = get_method_res_type(tp, 0);
1627         ir_node *mem = get_store();
1628         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1629         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1630         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1631 }
1632
1633
1634 /**
1635  * Generate an binary-void-return builtin.
1636  *
1637  * @param kind           the builtin kind to generate
1638  * @param op1            the first operand
1639  * @param op2            the second operand
1640  * @param function_type  the function type for the GNU builtin routine
1641  * @param db             debug info
1642  */
1643 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1, expression_t *op2,
1644                                                                            type_t *function_type, dbg_info *db)
1645 {
1646         ir_node *in[2];
1647         in[0] = expression_to_firm(op1);
1648         in[1] = expression_to_firm(op2);
1649
1650         ir_type *tp  = get_ir_type(function_type);
1651         ir_node *mem = get_store();
1652         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1653         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1654         return NULL;
1655 }
1656
1657 /**
1658  * Transform calls to builtin functions.
1659  */
1660 static ir_node *process_builtin_call(const call_expression_t *call)
1661 {
1662         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1663
1664         assert(call->function->kind == EXPR_REFERENCE);
1665         reference_expression_t *builtin = &call->function->reference;
1666
1667         type_t *type = skip_typeref(builtin->base.type);
1668         assert(is_type_pointer(type));
1669
1670         type_t   *function_type = skip_typeref(type->pointer.points_to);
1671
1672         switch (builtin->entity->function.btk) {
1673         case bk_gnu_builtin_alloca: {
1674                 if (call->arguments == NULL || call->arguments->next != NULL) {
1675                         panic("invalid number of parameters on __builtin_alloca");
1676                 }
1677                 expression_t *argument = call->arguments->expression;
1678                 ir_node      *size     = expression_to_firm(argument);
1679
1680                 ir_node *store  = get_store();
1681                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1682                                               stack_alloc);
1683                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1684                 set_store(proj_m);
1685                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1686
1687                 return res;
1688         }
1689
1690         case bk_gnu_builtin_huge_val:
1691         case bk_gnu_builtin_inf:
1692         case bk_gnu_builtin_inff:
1693         case bk_gnu_builtin_infl: {
1694                 type_t  *type = function_type->function.return_type;
1695                 ir_mode *mode = get_ir_mode_arithmetic(type);
1696                 tarval  *tv   = get_mode_infinite(mode);
1697                 ir_node *res  = new_d_Const(dbgi, tv);
1698                 return   res;
1699         }
1700         case bk_gnu_builtin_nan:
1701         case bk_gnu_builtin_nanf:
1702         case bk_gnu_builtin_nanl: {
1703                 /* Ignore string for now... */
1704                 assert(is_type_function(function_type));
1705                 type_t  *type = function_type->function.return_type;
1706                 ir_mode *mode = get_ir_mode_arithmetic(type);
1707                 tarval  *tv   = get_mode_NAN(mode);
1708                 ir_node *res  = new_d_Const(dbgi, tv);
1709                 return res;
1710         }
1711         case bk_gnu_builtin_expect: {
1712                 expression_t *argument = call->arguments->expression;
1713                 return _expression_to_firm(argument);
1714         }
1715         case bk_gnu_builtin_va_end:
1716                 /* evaluate the argument of va_end for its side effects */
1717                 _expression_to_firm(call->arguments->expression);
1718                 return NULL;
1719         case bk_gnu_builtin_frame_address: {
1720                 expression_t *const expression = call->arguments->expression;
1721                 bool val = fold_constant_to_bool(expression);
1722                 if (!val) {
1723                         /* the nice case */
1724                         return get_irg_frame(current_ir_graph);
1725                 } else {
1726                         /* get the argument */
1727                         ir_node *in[2];
1728
1729                         in[0] = expression_to_firm(expression);
1730                         in[1] = get_irg_frame(current_ir_graph);
1731                         ir_type *tp  = get_ir_type(function_type);
1732                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1733                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1734                 }
1735         }
1736         case bk_gnu_builtin_return_address: {
1737
1738                 expression_t *const expression = call->arguments->expression;
1739                 ir_node *in[2];
1740
1741                 in[0] = expression_to_firm(expression);
1742                 in[1] = get_irg_frame(current_ir_graph);
1743                 ir_type *tp  = get_ir_type(function_type);
1744                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1745                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1746         }
1747         case bk_gnu_builtin_ffs:
1748                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1749         case bk_gnu_builtin_clz:
1750                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1751         case bk_gnu_builtin_ctz:
1752                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1753         case bk_gnu_builtin_popcount:
1754         case bk_ms__popcount:
1755                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1756         case bk_gnu_builtin_parity:
1757                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1758         case bk_gnu_builtin_prefetch: {
1759                 call_argument_t *const args = call->arguments;
1760                 expression_t *const addr    = args->expression;
1761                 ir_node *in[3];
1762
1763                 in[0] = _expression_to_firm(addr);
1764                 if (args->next != NULL) {
1765                         expression_t *const rw = args->next->expression;
1766
1767                         in[1] = _expression_to_firm(rw);
1768
1769                         if (args->next->next != NULL) {
1770                                 expression_t *const locality = args->next->next->expression;
1771
1772                                 in[2] = expression_to_firm(locality);
1773                         } else {
1774                                 in[2] = new_Const_long(mode_int, 3);
1775                         }
1776                 } else {
1777                         in[1] = new_Const_long(mode_int, 0);
1778                         in[2] = new_Const_long(mode_int, 3);
1779                 }
1780                 ir_type *tp  = get_ir_type(function_type);
1781                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1782                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1783                 return NULL;
1784         }
1785         case bk_gnu_builtin_trap:
1786         case bk_ms__ud2:
1787         {
1788                 ir_type *tp  = get_ir_type(function_type);
1789                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1790                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1791                 return NULL;
1792         }
1793         case bk_ms__debugbreak: {
1794                 ir_type *tp  = get_ir_type(function_type);
1795                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1796                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1797                 return NULL;
1798         }
1799         case bk_ms_ReturnAddress: {
1800                 ir_node *in[2];
1801
1802                 in[0] = new_Const_long(mode_int, 0);
1803                 in[1] = get_irg_frame(current_ir_graph);
1804                 ir_type *tp  = get_ir_type(function_type);
1805                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1806                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1807         }
1808         case bk_ms_rotl:
1809         case bk_ms_rotl64: {
1810                 ir_node *val  = expression_to_firm(call->arguments->expression);
1811                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1812                 ir_mode *mode = get_irn_mode(val);
1813                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1814         }
1815         case bk_ms_rotr:
1816         case bk_ms_rotr64: {
1817                 ir_node *val  = expression_to_firm(call->arguments->expression);
1818                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1819                 ir_mode *mode = get_irn_mode(val);
1820                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1821                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1822                 return new_d_Rotl(dbgi, val, sub, mode);
1823         }
1824         case bk_ms_byteswap_ushort:
1825         case bk_ms_byteswap_ulong:
1826         case bk_ms_byteswap_uint64:
1827                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1828         case bk_ms__inbyte:
1829         case bk_ms__inword:
1830         case bk_ms__indword:
1831                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1832         case bk_ms__outbyte:
1833         case bk_ms__outword:
1834         case bk_ms__outdword:
1835                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1836                         call->arguments->next->expression, function_type, dbgi);
1837         default:
1838                 panic("unsupported builtin found");
1839         }
1840 }
1841
1842 /**
1843  * Transform a call expression.
1844  * Handles some special cases, like alloca() calls, which must be resolved
1845  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1846  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1847  * handled right...
1848  */
1849 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1850 {
1851         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1852         assert(get_cur_block() != NULL);
1853
1854         expression_t *function = call->function;
1855         if (function->kind == EXPR_REFERENCE) {
1856                 const reference_expression_t *ref    = &function->reference;
1857                 entity_t                     *entity = ref->entity;
1858
1859                 if (entity->kind == ENTITY_FUNCTION) {
1860                         if (entity->function.btk != bk_none) {
1861                                 return process_builtin_call(call);
1862                         }
1863
1864                         ir_entity *irentity = entity->function.irentity;
1865                         if (irentity == NULL)
1866                                 irentity = get_function_entity(entity, NULL);
1867
1868                         if (irentity == rts_entities[rts_alloca]) {
1869                                 /* handle alloca() call */
1870                                 expression_t *argument = call->arguments->expression;
1871                                 ir_node      *size     = expression_to_firm(argument);
1872                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1873
1874                                 size = create_conv(dbgi, size, mode);
1875
1876                                 ir_node  *store  = get_store();
1877                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1878                                                                firm_unknown_type, stack_alloc);
1879                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1880                                 set_store(proj_m);
1881                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1882
1883                                 return res;
1884                         }
1885                 }
1886         }
1887         ir_node *callee = expression_to_firm(function);
1888
1889         type_t *type = skip_typeref(function->base.type);
1890         assert(is_type_pointer(type));
1891         pointer_type_t *pointer_type = &type->pointer;
1892         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1893         assert(is_type_function(points_to));
1894         function_type_t *function_type = &points_to->function;
1895
1896         int      n_parameters = 0;
1897         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1898         ir_type *new_method_type = NULL;
1899         if (function_type->variadic || function_type->unspecified_parameters) {
1900                 const call_argument_t *argument = call->arguments;
1901                 for ( ; argument != NULL; argument = argument->next) {
1902                         ++n_parameters;
1903                 }
1904
1905                 /* we need to construct a new method type matching the call
1906                  * arguments... */
1907                 int n_res       = get_method_n_ress(ir_method_type);
1908                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1909                                                     n_parameters, n_res, dbgi);
1910                 set_method_calling_convention(new_method_type,
1911                                get_method_calling_convention(ir_method_type));
1912                 set_method_additional_properties(new_method_type,
1913                                get_method_additional_properties(ir_method_type));
1914                 set_method_variadicity(new_method_type,
1915                                        get_method_variadicity(ir_method_type));
1916
1917                 for (int i = 0; i < n_res; ++i) {
1918                         set_method_res_type(new_method_type, i,
1919                                             get_method_res_type(ir_method_type, i));
1920                 }
1921                 argument = call->arguments;
1922                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1923                         expression_t *expression = argument->expression;
1924                         ir_type      *irtype     = get_ir_type(expression->base.type);
1925                         set_method_param_type(new_method_type, i, irtype);
1926                 }
1927                 ir_method_type = new_method_type;
1928         } else {
1929                 n_parameters = get_method_n_params(ir_method_type);
1930         }
1931
1932         ir_node *in[n_parameters];
1933
1934         const call_argument_t *argument = call->arguments;
1935         for (int n = 0; n < n_parameters; ++n) {
1936                 expression_t *expression = argument->expression;
1937                 ir_node      *arg_node   = expression_to_firm(expression);
1938
1939                 type_t  *type = skip_typeref(expression->base.type);
1940                 if (!is_type_compound(type)) {
1941                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1942                         arg_node      = create_conv(dbgi, arg_node, mode);
1943                         arg_node      = do_strict_conv(dbgi, arg_node);
1944                 }
1945
1946                 in[n] = arg_node;
1947
1948                 argument = argument->next;
1949         }
1950
1951         ir_node  *store = get_store();
1952         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1953                                      ir_method_type);
1954         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1955         set_store(mem);
1956
1957         type_t  *return_type = skip_typeref(function_type->return_type);
1958         ir_node *result      = NULL;
1959
1960         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1961                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1962
1963                 if (is_type_scalar(return_type)) {
1964                         ir_mode *mode       = get_ir_mode_storage(return_type);
1965                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1966                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1967                         result              = create_conv(NULL, result, mode_arith);
1968                 } else {
1969                         ir_mode *mode = mode_P_data;
1970                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1971                 }
1972         }
1973
1974         if (function->kind == EXPR_REFERENCE &&
1975             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1976                 /* A dead end:  Keep the Call and the Block.  Also place all further
1977                  * nodes into a new and unreachable block. */
1978                 keep_alive(node);
1979                 keep_alive(get_cur_block());
1980                 new_Block(0, NULL);
1981         }
1982
1983         return result;
1984 }
1985
1986 static void statement_to_firm(statement_t *statement);
1987 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1988
1989 static ir_node *expression_to_addr(const expression_t *expression);
1990 static ir_node *create_condition_evaluation(const expression_t *expression,
1991                                             ir_node *true_block,
1992                                             ir_node *false_block);
1993
1994 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1995                          ir_node *value)
1996 {
1997         if (!is_type_compound(type)) {
1998                 ir_mode *mode = get_ir_mode_storage(type);
1999                 value         = create_conv(dbgi, value, mode);
2000                 value         = do_strict_conv(dbgi, value);
2001         }
2002
2003         ir_node *memory = get_store();
2004
2005         if (is_type_scalar(type)) {
2006                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2007                                       ? cons_volatile : cons_none;
2008                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2009                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2010                 set_store(store_mem);
2011         } else {
2012                 ir_type *irtype    = get_ir_type(type);
2013                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2014                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2015                 set_store(copyb_mem);
2016         }
2017 }
2018
2019 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2020 {
2021         tarval *all_one   = get_mode_all_one(mode);
2022         int     mode_size = get_mode_size_bits(mode);
2023
2024         assert(offset >= 0);
2025         assert(size   >= 0);
2026         assert(offset + size <= mode_size);
2027         if (size == mode_size) {
2028                 return all_one;
2029         }
2030
2031         long    shiftr    = get_mode_size_bits(mode) - size;
2032         long    shiftl    = offset;
2033         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2034         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2035         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2036         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2037
2038         return mask1;
2039 }
2040
2041 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2042                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2043 {
2044         ir_type *entity_type = get_entity_type(entity);
2045         ir_type *base_type   = get_primitive_base_type(entity_type);
2046         assert(base_type != NULL);
2047         ir_mode *mode        = get_type_mode(base_type);
2048
2049         value = create_conv(dbgi, value, mode);
2050
2051         /* kill upper bits of value and shift to right position */
2052         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2053         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2054
2055         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
2056         ir_node *mask_node       = new_d_Const(dbgi, mask);
2057         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2058         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2059         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
2060         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2061
2062         /* load current value */
2063         ir_node  *mem             = get_store();
2064         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
2065                                         set_volatile ? cons_volatile : cons_none);
2066         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2067         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2068         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2069         tarval   *inv_mask        = tarval_not(shift_mask);
2070         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2071         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2072
2073         /* construct new value and store */
2074         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2075         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2076                                          set_volatile ? cons_volatile : cons_none);
2077         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2078         set_store(store_mem);
2079
2080         return value_masked;
2081 }
2082
2083 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2084                 ir_node *addr)
2085 {
2086         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2087         type_t   *type     = expression->base.type;
2088         ir_mode  *mode     = get_ir_mode_storage(type);
2089         ir_node  *mem      = get_store();
2090         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2091         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2092         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2093
2094         load_res           = create_conv(dbgi, load_res, mode_int);
2095
2096         set_store(load_mem);
2097
2098         /* kill upper bits */
2099         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2100         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2101         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2102         ir_type   *entity_type  = get_entity_type(entity);
2103         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2104         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2105         assert(shift_bitsl >= 0);
2106         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2107         ir_node   *countl       = new_d_Const(dbgi, tvl);
2108         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2109
2110         long       shift_bitsr  = bitoffset + shift_bitsl;
2111         assert(shift_bitsr <= (long) machine_size);
2112         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2113         ir_node   *countr       = new_d_Const(dbgi, tvr);
2114         ir_node   *shiftr;
2115         if (mode_is_signed(mode)) {
2116                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2117         } else {
2118                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2119         }
2120
2121         return create_conv(dbgi, shiftr, mode);
2122 }
2123
2124 /* make sure the selected compound type is constructed */
2125 static void construct_select_compound(const select_expression_t *expression)
2126 {
2127         type_t *type = skip_typeref(expression->compound->base.type);
2128         if (is_type_pointer(type)) {
2129                 type = type->pointer.points_to;
2130         }
2131         (void) get_ir_type(type);
2132 }
2133
2134 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2135                                               ir_node *value, ir_node *addr)
2136 {
2137         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2138         type_t   *type = skip_typeref(expression->base.type);
2139
2140         if (!is_type_compound(type)) {
2141                 ir_mode  *mode = get_ir_mode_storage(type);
2142                 value          = create_conv(dbgi, value, mode);
2143                 value          = do_strict_conv(dbgi, value);
2144         }
2145
2146         if (expression->kind == EXPR_REFERENCE) {
2147                 const reference_expression_t *ref = &expression->reference;
2148
2149                 entity_t *entity = ref->entity;
2150                 assert(is_declaration(entity));
2151                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2152                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2153                         set_value(entity->variable.v.value_number, value);
2154                         return value;
2155                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2156                         set_value(entity->parameter.v.value_number, value);
2157                         return value;
2158                 }
2159         }
2160
2161         if (addr == NULL)
2162                 addr = expression_to_addr(expression);
2163         assert(addr != NULL);
2164
2165         if (expression->kind == EXPR_SELECT) {
2166                 const select_expression_t *select = &expression->select;
2167
2168                 construct_select_compound(select);
2169
2170                 entity_t *entity = select->compound_entry;
2171                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2172                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2173                         ir_entity *irentity = entity->compound_member.entity;
2174                         bool       set_volatile
2175                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2176                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2177                                                        set_volatile);
2178                         return value;
2179                 }
2180         }
2181
2182         assign_value(dbgi, addr, type, value);
2183         return value;
2184 }
2185
2186 static void set_value_for_expression(const expression_t *expression,
2187                                      ir_node *value)
2188 {
2189         set_value_for_expression_addr(expression, value, NULL);
2190 }
2191
2192 static ir_node *get_value_from_lvalue(const expression_t *expression,
2193                                       ir_node *addr)
2194 {
2195         if (expression->kind == EXPR_REFERENCE) {
2196                 const reference_expression_t *ref = &expression->reference;
2197
2198                 entity_t *entity = ref->entity;
2199                 assert(entity->kind == ENTITY_VARIABLE
2200                                 || entity->kind == ENTITY_PARAMETER);
2201                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2202                 int value_number;
2203                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2204                         value_number = entity->variable.v.value_number;
2205                         assert(addr == NULL);
2206                         type_t  *type = skip_typeref(expression->base.type);
2207                         ir_mode *mode = get_ir_mode_storage(type);
2208                         ir_node *res  = get_value(value_number, mode);
2209                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2210                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2211                         value_number = entity->parameter.v.value_number;
2212                         assert(addr == NULL);
2213                         type_t  *type = skip_typeref(expression->base.type);
2214                         ir_mode *mode = get_ir_mode_storage(type);
2215                         ir_node *res  = get_value(value_number, mode);
2216                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2217                 }
2218         }
2219
2220         assert(addr != NULL);
2221         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2222
2223         ir_node *value;
2224         if (expression->kind == EXPR_SELECT &&
2225             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2226             construct_select_compound(&expression->select);
2227                 value = bitfield_extract_to_firm(&expression->select, addr);
2228         } else {
2229                 value = deref_address(dbgi, expression->base.type, addr);
2230         }
2231
2232         return value;
2233 }
2234
2235
2236 static ir_node *create_incdec(const unary_expression_t *expression)
2237 {
2238         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2239         const expression_t *value_expr = expression->value;
2240         ir_node            *addr       = expression_to_addr(value_expr);
2241         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2242
2243         type_t  *type = skip_typeref(expression->base.type);
2244         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2245
2246         ir_node *offset;
2247         if (is_type_pointer(type)) {
2248                 pointer_type_t *pointer_type = &type->pointer;
2249                 offset = get_type_size_node(pointer_type->points_to);
2250         } else {
2251                 assert(is_type_arithmetic(type));
2252                 offset = new_Const(get_mode_one(mode));
2253         }
2254
2255         ir_node *result;
2256         ir_node *store_value;
2257         switch(expression->base.kind) {
2258         case EXPR_UNARY_POSTFIX_INCREMENT:
2259                 result      = value;
2260                 store_value = new_d_Add(dbgi, value, offset, mode);
2261                 break;
2262         case EXPR_UNARY_POSTFIX_DECREMENT:
2263                 result      = value;
2264                 store_value = new_d_Sub(dbgi, value, offset, mode);
2265                 break;
2266         case EXPR_UNARY_PREFIX_INCREMENT:
2267                 result      = new_d_Add(dbgi, value, offset, mode);
2268                 store_value = result;
2269                 break;
2270         case EXPR_UNARY_PREFIX_DECREMENT:
2271                 result      = new_d_Sub(dbgi, value, offset, mode);
2272                 store_value = result;
2273                 break;
2274         default:
2275                 panic("no incdec expr in create_incdec");
2276         }
2277
2278         set_value_for_expression_addr(value_expr, store_value, addr);
2279
2280         return result;
2281 }
2282
2283 static bool is_local_variable(expression_t *expression)
2284 {
2285         if (expression->kind != EXPR_REFERENCE)
2286                 return false;
2287         reference_expression_t *ref_expr = &expression->reference;
2288         entity_t               *entity   = ref_expr->entity;
2289         if (entity->kind != ENTITY_VARIABLE)
2290                 return false;
2291         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2292         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2293 }
2294
2295 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2296 {
2297         switch(kind) {
2298         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2299         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2300         case EXPR_BINARY_NOTEQUAL:
2301                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2302         case EXPR_BINARY_ISLESS:
2303         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2304         case EXPR_BINARY_ISLESSEQUAL:
2305         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2306         case EXPR_BINARY_ISGREATER:
2307         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2308         case EXPR_BINARY_ISGREATEREQUAL:
2309         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2310         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2311
2312         default:
2313                 break;
2314         }
2315         panic("trying to get pn_Cmp from non-comparison binexpr type");
2316 }
2317
2318 /**
2319  * Handle the assume optimizer hint: check if a Confirm
2320  * node can be created.
2321  *
2322  * @param dbi    debug info
2323  * @param expr   the IL assume expression
2324  *
2325  * we support here only some simple cases:
2326  *  - var rel const
2327  *  - const rel val
2328  *  - var rel var
2329  */
2330 static ir_node *handle_assume_compare(dbg_info *dbi,
2331                                       const binary_expression_t *expression)
2332 {
2333         expression_t *op1 = expression->left;
2334         expression_t *op2 = expression->right;
2335         entity_t     *var2, *var = NULL;
2336         ir_node      *res = NULL;
2337         pn_Cmp        cmp_val;
2338
2339         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2340
2341         if (is_local_variable(op1) && is_local_variable(op2)) {
2342         var  = op1->reference.entity;
2343             var2 = op2->reference.entity;
2344
2345                 type_t  *const type = skip_typeref(var->declaration.type);
2346                 ir_mode *const mode = get_ir_mode_storage(type);
2347
2348                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2349                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2350
2351                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2352                 set_value(var2->variable.v.value_number, res);
2353
2354                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2355                 set_value(var->variable.v.value_number, res);
2356
2357                 return res;
2358         }
2359
2360         expression_t *con;
2361         if (is_local_variable(op1) && is_constant_expression(op2)) {
2362                 var = op1->reference.entity;
2363                 con = op2;
2364         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2365                 cmp_val = get_inversed_pnc(cmp_val);
2366                 var = op2->reference.entity;
2367                 con = op1;
2368         }
2369
2370         if (var != NULL) {
2371                 type_t  *const type = skip_typeref(var->declaration.type);
2372                 ir_mode *const mode = get_ir_mode_storage(type);
2373
2374                 res = get_value(var->variable.v.value_number, mode);
2375                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2376                 set_value(var->variable.v.value_number, res);
2377         }
2378         return res;
2379 }
2380
2381 /**
2382  * Handle the assume optimizer hint.
2383  *
2384  * @param dbi    debug info
2385  * @param expr   the IL assume expression
2386  */
2387 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2388 {
2389         switch(expression->kind) {
2390         case EXPR_BINARY_EQUAL:
2391         case EXPR_BINARY_NOTEQUAL:
2392         case EXPR_BINARY_LESS:
2393         case EXPR_BINARY_LESSEQUAL:
2394         case EXPR_BINARY_GREATER:
2395         case EXPR_BINARY_GREATEREQUAL:
2396                 return handle_assume_compare(dbi, &expression->binary);
2397         default:
2398                 return NULL;
2399         }
2400 }
2401
2402 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2403 {
2404         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2405         type_t   *type = skip_typeref(expression->base.type);
2406
2407         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2408                 return expression_to_addr(expression->value);
2409
2410         const expression_t *value = expression->value;
2411
2412         switch(expression->base.kind) {
2413         case EXPR_UNARY_NEGATE: {
2414                 ir_node *value_node = expression_to_firm(value);
2415                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2416                 return new_d_Minus(dbgi, value_node, mode);
2417         }
2418         case EXPR_UNARY_PLUS:
2419                 return expression_to_firm(value);
2420         case EXPR_UNARY_BITWISE_NEGATE: {
2421                 ir_node *value_node = expression_to_firm(value);
2422                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2423                 return new_d_Not(dbgi, value_node, mode);
2424         }
2425         case EXPR_UNARY_NOT: {
2426                 ir_node *value_node = _expression_to_firm(value);
2427                 value_node          = create_conv(dbgi, value_node, mode_b);
2428                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2429                 return res;
2430         }
2431         case EXPR_UNARY_DEREFERENCE: {
2432                 ir_node *value_node = expression_to_firm(value);
2433                 type_t  *value_type = skip_typeref(value->base.type);
2434                 assert(is_type_pointer(value_type));
2435
2436                 /* check for __based */
2437                 const variable_t *const base_var = value_type->pointer.base_variable;
2438                 if (base_var != NULL) {
2439                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2440                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2441                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2442                 }
2443                 type_t  *points_to  = value_type->pointer.points_to;
2444                 return deref_address(dbgi, points_to, value_node);
2445         }
2446         case EXPR_UNARY_POSTFIX_INCREMENT:
2447         case EXPR_UNARY_POSTFIX_DECREMENT:
2448         case EXPR_UNARY_PREFIX_INCREMENT:
2449         case EXPR_UNARY_PREFIX_DECREMENT:
2450                 return create_incdec(expression);
2451         case EXPR_UNARY_CAST: {
2452                 ir_node *value_node = expression_to_firm(value);
2453                 if (is_type_scalar(type)) {
2454                         ir_mode *mode      = get_ir_mode_storage(type);
2455                         type_t  *from_type = skip_typeref(value->base.type);
2456                         /* check for conversion from / to __based types */
2457                         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2458                                 const variable_t *from_var = from_type->pointer.base_variable;
2459                                 const variable_t *to_var   = type->pointer.base_variable;
2460                                 if (from_var != to_var) {
2461                                         if (from_var != NULL) {
2462                                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2463                                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2464                                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2465                                         }
2466                                         if (to_var != NULL) {
2467                                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2468                                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2469                                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2470                                         }
2471                                 }
2472                         }
2473                         ir_node *node       = create_conv(dbgi, value_node, mode);
2474                         node                = do_strict_conv(dbgi, node);
2475                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2476                         node                = create_conv(dbgi, node, mode_arith);
2477                         return node;
2478                 } else {
2479                         /* make sure firm type is constructed */
2480                         (void) get_ir_type(type);
2481                         return value_node;
2482                 }
2483         }
2484         case EXPR_UNARY_CAST_IMPLICIT: {
2485                 ir_node *value_node = expression_to_firm(value);
2486                 if (is_type_scalar(type)) {
2487                         ir_mode *mode       = get_ir_mode_storage(type);
2488                         ir_node *res        = create_conv(dbgi, value_node, mode);
2489                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2490                         res                 = create_conv(dbgi, res, mode_arith);
2491                         return res;
2492                 } else {
2493                         return value_node;
2494                 }
2495         }
2496         case EXPR_UNARY_ASSUME:
2497                 if (firm_opt.confirm)
2498                         return handle_assume(dbgi, value);
2499                 else
2500                         return NULL;
2501
2502         default:
2503                 break;
2504         }
2505         panic("invalid UNEXPR type found");
2506 }
2507
2508 /**
2509  * produces a 0/1 depending of the value of a mode_b node
2510  */
2511 static ir_node *produce_condition_result(const expression_t *expression,
2512                                          ir_mode *mode, dbg_info *dbgi)
2513 {
2514         ir_node *cur_block = get_cur_block();
2515
2516         ir_node *one_block = new_immBlock();
2517         set_cur_block(one_block);
2518         ir_node *one       = new_Const(get_mode_one(mode));
2519         ir_node *jmp_one   = new_d_Jmp(dbgi);
2520
2521         ir_node *zero_block = new_immBlock();
2522         set_cur_block(zero_block);
2523         ir_node *zero       = new_Const(get_mode_null(mode));
2524         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2525
2526         set_cur_block(cur_block);
2527         create_condition_evaluation(expression, one_block, zero_block);
2528         mature_immBlock(one_block);
2529         mature_immBlock(zero_block);
2530
2531         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2532         new_Block(2, in_cf);
2533
2534         ir_node *in[2] = { one, zero };
2535         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2536
2537         return val;
2538 }
2539
2540 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2541                 ir_node *value, type_t *type)
2542 {
2543         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2544         assert(is_type_pointer(type));
2545         pointer_type_t *const pointer_type = &type->pointer;
2546         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2547         ir_node        *      elem_size    = get_type_size_node(points_to);
2548         elem_size                          = create_conv(dbgi, elem_size, mode);
2549         value                              = create_conv(dbgi, value,     mode);
2550         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2551         return mul;
2552 }
2553
2554 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2555                           ir_node *left, ir_node *right)
2556 {
2557         ir_mode  *mode;
2558         type_t   *type_left  = skip_typeref(expression->left->base.type);
2559         type_t   *type_right = skip_typeref(expression->right->base.type);
2560
2561         expression_kind_t kind = expression->base.kind;
2562
2563         switch (kind) {
2564         case EXPR_BINARY_SHIFTLEFT:
2565         case EXPR_BINARY_SHIFTRIGHT:
2566         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2567         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2568                 mode  = get_irn_mode(left);
2569                 right = create_conv(dbgi, right, mode_uint);
2570                 break;
2571
2572         case EXPR_BINARY_SUB:
2573                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2574                         const pointer_type_t *const ptr_type = &type_left->pointer;
2575
2576                         mode = get_ir_mode_arithmetic(expression->base.type);
2577                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2578                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2579                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2580                         ir_node *const no_mem    = new_NoMem();
2581                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2582                                                                                                    mode, op_pin_state_floats);
2583                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2584                 }
2585                 /* fallthrough */
2586         case EXPR_BINARY_SUB_ASSIGN:
2587                 if (is_type_pointer(type_left)) {
2588                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2589                         mode  = get_ir_mode_arithmetic(type_left);
2590                         break;
2591                 }
2592                 goto normal_node;
2593
2594         case EXPR_BINARY_ADD:
2595         case EXPR_BINARY_ADD_ASSIGN:
2596                 if (is_type_pointer(type_left)) {
2597                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2598                         mode  = get_ir_mode_arithmetic(type_left);
2599                         break;
2600                 } else if (is_type_pointer(type_right)) {
2601                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2602                         mode  = get_ir_mode_arithmetic(type_right);
2603                         break;
2604                 }
2605                 goto normal_node;
2606
2607         default:
2608 normal_node:
2609                 mode = get_ir_mode_arithmetic(type_right);
2610                 left = create_conv(dbgi, left, mode);
2611                 break;
2612         }
2613
2614         switch (kind) {
2615         case EXPR_BINARY_ADD_ASSIGN:
2616         case EXPR_BINARY_ADD:
2617                 return new_d_Add(dbgi, left, right, mode);
2618         case EXPR_BINARY_SUB_ASSIGN:
2619         case EXPR_BINARY_SUB:
2620                 return new_d_Sub(dbgi, left, right, mode);
2621         case EXPR_BINARY_MUL_ASSIGN:
2622         case EXPR_BINARY_MUL:
2623                 return new_d_Mul(dbgi, left, right, mode);
2624         case EXPR_BINARY_BITWISE_AND:
2625         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2626                 return new_d_And(dbgi, left, right, mode);
2627         case EXPR_BINARY_BITWISE_OR:
2628         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2629                 return new_d_Or(dbgi, left, right, mode);
2630         case EXPR_BINARY_BITWISE_XOR:
2631         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2632                 return new_d_Eor(dbgi, left, right, mode);
2633         case EXPR_BINARY_SHIFTLEFT:
2634         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2635                 return new_d_Shl(dbgi, left, right, mode);
2636         case EXPR_BINARY_SHIFTRIGHT:
2637         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2638                 if (mode_is_signed(mode)) {
2639                         return new_d_Shrs(dbgi, left, right, mode);
2640                 } else {
2641                         return new_d_Shr(dbgi, left, right, mode);
2642                 }
2643         case EXPR_BINARY_DIV:
2644         case EXPR_BINARY_DIV_ASSIGN: {
2645                 ir_node *pin = new_Pin(new_NoMem());
2646                 ir_node *op;
2647                 ir_node *res;
2648                 if (mode_is_float(mode)) {
2649                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2650                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2651                 } else {
2652                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2653                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2654                 }
2655                 return res;
2656         }
2657         case EXPR_BINARY_MOD:
2658         case EXPR_BINARY_MOD_ASSIGN: {
2659                 ir_node *pin = new_Pin(new_NoMem());
2660                 assert(!mode_is_float(mode));
2661                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2662                                          op_pin_state_floats);
2663                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2664                 return res;
2665         }
2666         default:
2667                 panic("unexpected expression kind");
2668         }
2669 }
2670
2671 static ir_node *create_lazy_op(const binary_expression_t *expression)
2672 {
2673         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2674         type_t   *type = skip_typeref(expression->base.type);
2675         ir_mode  *mode = get_ir_mode_arithmetic(type);
2676
2677         if (is_constant_expression(expression->left)) {
2678                 bool val = fold_constant_to_bool(expression->left);
2679                 expression_kind_t ekind = expression->base.kind;
2680                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2681                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2682                         if (!val) {
2683                                 return new_Const(get_mode_null(mode));
2684                         }
2685                 } else {
2686                         if (val) {
2687                                 return new_Const(get_mode_one(mode));
2688                         }
2689                 }
2690
2691                 if (is_constant_expression(expression->right)) {
2692                         bool valr = fold_constant_to_bool(expression->right);
2693                         return valr ?
2694                                 new_Const(get_mode_one(mode)) :
2695                                 new_Const(get_mode_null(mode));
2696                 }
2697
2698                 return produce_condition_result(expression->right, mode, dbgi);
2699         }
2700
2701         return produce_condition_result((const expression_t*) expression, mode,
2702                                         dbgi);
2703 }
2704
2705 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2706                                             ir_node *right, ir_mode *mode);
2707
2708 static ir_node *create_assign_binop(const binary_expression_t *expression)
2709 {
2710         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2711         const expression_t *left_expr = expression->left;
2712         type_t             *type      = skip_typeref(left_expr->base.type);
2713         ir_mode            *left_mode = get_ir_mode_storage(type);
2714         ir_node            *right     = expression_to_firm(expression->right);
2715         ir_node            *left_addr = expression_to_addr(left_expr);
2716         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2717         ir_node            *result    = create_op(dbgi, expression, left, right);
2718
2719         result = create_conv(dbgi, result, left_mode);
2720         result = do_strict_conv(dbgi, result);
2721
2722         result = set_value_for_expression_addr(left_expr, result, left_addr);
2723
2724         if (!is_type_compound(type)) {
2725                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2726                 result = create_conv(dbgi, result, mode_arithmetic);
2727         }
2728         return result;
2729 }
2730
2731 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2732 {
2733         expression_kind_t kind = expression->base.kind;
2734
2735         switch(kind) {
2736         case EXPR_BINARY_EQUAL:
2737         case EXPR_BINARY_NOTEQUAL:
2738         case EXPR_BINARY_LESS:
2739         case EXPR_BINARY_LESSEQUAL:
2740         case EXPR_BINARY_GREATER:
2741         case EXPR_BINARY_GREATEREQUAL:
2742         case EXPR_BINARY_ISGREATER:
2743         case EXPR_BINARY_ISGREATEREQUAL:
2744         case EXPR_BINARY_ISLESS:
2745         case EXPR_BINARY_ISLESSEQUAL:
2746         case EXPR_BINARY_ISLESSGREATER:
2747         case EXPR_BINARY_ISUNORDERED: {
2748                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2749                 ir_node *left  = expression_to_firm(expression->left);
2750                 ir_node *right = expression_to_firm(expression->right);
2751                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2752                 long     pnc   = get_pnc(kind, expression->left->base.type);
2753                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2754                 return proj;
2755         }
2756         case EXPR_BINARY_ASSIGN: {
2757                 ir_node *addr  = expression_to_addr(expression->left);
2758                 ir_node *right = expression_to_firm(expression->right);
2759                 ir_node *res
2760                         = set_value_for_expression_addr(expression->left, right, addr);
2761
2762                 type_t  *type            = skip_typeref(expression->base.type);
2763                 if (!is_type_compound(type)) {
2764                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2765                         res                      = create_conv(NULL, res, mode_arithmetic);
2766                 }
2767                 return res;
2768         }
2769         case EXPR_BINARY_ADD:
2770         case EXPR_BINARY_SUB:
2771         case EXPR_BINARY_MUL:
2772         case EXPR_BINARY_DIV:
2773         case EXPR_BINARY_MOD:
2774         case EXPR_BINARY_BITWISE_AND:
2775         case EXPR_BINARY_BITWISE_OR:
2776         case EXPR_BINARY_BITWISE_XOR:
2777         case EXPR_BINARY_SHIFTLEFT:
2778         case EXPR_BINARY_SHIFTRIGHT:
2779         {
2780                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2781                 ir_node  *left  = expression_to_firm(expression->left);
2782                 ir_node  *right = expression_to_firm(expression->right);
2783                 return create_op(dbgi, expression, left, right);
2784         }
2785         case EXPR_BINARY_LOGICAL_AND:
2786         case EXPR_BINARY_LOGICAL_OR:
2787                 return create_lazy_op(expression);
2788         case EXPR_BINARY_COMMA:
2789                 /* create side effects of left side */
2790                 (void) expression_to_firm(expression->left);
2791                 return _expression_to_firm(expression->right);
2792
2793         case EXPR_BINARY_ADD_ASSIGN:
2794         case EXPR_BINARY_SUB_ASSIGN:
2795         case EXPR_BINARY_MUL_ASSIGN:
2796         case EXPR_BINARY_MOD_ASSIGN:
2797         case EXPR_BINARY_DIV_ASSIGN:
2798         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2799         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2800         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2801         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2802         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2803                 return create_assign_binop(expression);
2804         default:
2805                 panic("TODO binexpr type");
2806         }
2807 }
2808
2809 static ir_node *array_access_addr(const array_access_expression_t *expression)
2810 {
2811         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2812         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2813         ir_node  *offset      = expression_to_firm(expression->index);
2814         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2815         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2816         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2817
2818         return result;
2819 }
2820
2821 static ir_node *array_access_to_firm(
2822                 const array_access_expression_t *expression)
2823 {
2824         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2825         ir_node  *addr   = array_access_addr(expression);
2826         type_t   *type   = revert_automatic_type_conversion(
2827                         (const expression_t*) expression);
2828         type             = skip_typeref(type);
2829
2830         return deref_address(dbgi, type, addr);
2831 }
2832
2833 static long get_offsetof_offset(const offsetof_expression_t *expression)
2834 {
2835         type_t *orig_type = expression->type;
2836         long    offset    = 0;
2837
2838         designator_t *designator = expression->designator;
2839         for ( ; designator != NULL; designator = designator->next) {
2840                 type_t *type = skip_typeref(orig_type);
2841                 /* be sure the type is constructed */
2842                 (void) get_ir_type(type);
2843
2844                 if (designator->symbol != NULL) {
2845                         assert(is_type_compound(type));
2846                         symbol_t *symbol = designator->symbol;
2847
2848                         compound_t *compound = type->compound.compound;
2849                         entity_t   *iter     = compound->members.entities;
2850                         for ( ; iter != NULL; iter = iter->base.next) {
2851                                 if (iter->base.symbol == symbol) {
2852                                         break;
2853                                 }
2854                         }
2855                         assert(iter != NULL);
2856
2857                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2858                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2859                         offset += get_entity_offset(iter->compound_member.entity);
2860
2861                         orig_type = iter->declaration.type;
2862                 } else {
2863                         expression_t *array_index = designator->array_index;
2864                         assert(designator->array_index != NULL);
2865                         assert(is_type_array(type));
2866
2867                         long index         = fold_constant_to_int(array_index);
2868                         ir_type *arr_type  = get_ir_type(type);
2869                         ir_type *elem_type = get_array_element_type(arr_type);
2870                         long     elem_size = get_type_size_bytes(elem_type);
2871
2872                         offset += index * elem_size;
2873
2874                         orig_type = type->array.element_type;
2875                 }
2876         }
2877
2878         return offset;
2879 }
2880
2881 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2882 {
2883         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2884         long      offset = get_offsetof_offset(expression);
2885         tarval   *tv     = new_tarval_from_long(offset, mode);
2886         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2887
2888         return new_d_Const(dbgi, tv);
2889 }
2890
2891 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2892                                      ir_entity *entity, type_t *type);
2893
2894 static ir_node *compound_literal_to_firm(
2895                 const compound_literal_expression_t *expression)
2896 {
2897         type_t *type = expression->type;
2898
2899         /* create an entity on the stack */
2900         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2901
2902         ident     *const id     = id_unique("CompLit.%u");
2903         ir_type   *const irtype = get_ir_type(type);
2904         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2905         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2906         set_entity_ld_ident(entity, id);
2907
2908         set_entity_variability(entity, variability_uninitialized);
2909
2910         /* create initialisation code */
2911         initializer_t *initializer = expression->initializer;
2912         create_local_initializer(initializer, dbgi, entity, type);
2913
2914         /* create a sel for the compound literal address */
2915         ir_node *frame = get_irg_frame(current_ir_graph);
2916         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2917         return sel;
2918 }
2919
2920 /**
2921  * Transform a sizeof expression into Firm code.
2922  */
2923 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2924 {
2925         type_t *const type = skip_typeref(expression->type);
2926         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2927         if (is_type_array(type) && type->array.is_vla
2928                         && expression->tp_expression != NULL) {
2929                 expression_to_firm(expression->tp_expression);
2930         }
2931
2932         return get_type_size_node(type);
2933 }
2934
2935 static entity_t *get_expression_entity(const expression_t *expression)
2936 {
2937         if (expression->kind != EXPR_REFERENCE)
2938                 return NULL;
2939
2940         return expression->reference.entity;
2941 }
2942
2943 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2944 {
2945         switch(entity->kind) {
2946         DECLARATION_KIND_CASES
2947                 return entity->declaration.alignment;
2948         case ENTITY_STRUCT:
2949         case ENTITY_UNION:
2950                 return entity->compound.alignment;
2951         case ENTITY_TYPEDEF:
2952                 return entity->typedefe.alignment;
2953         default:
2954                 break;
2955         }
2956         return 0;
2957 }
2958
2959 /**
2960  * Transform an alignof expression into Firm code.
2961  */
2962 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2963 {
2964         unsigned alignment = 0;
2965
2966         const expression_t *tp_expression = expression->tp_expression;
2967         if (tp_expression != NULL) {
2968                 entity_t *entity = get_expression_entity(tp_expression);
2969                 if (entity != NULL) {
2970                         alignment = get_cparser_entity_alignment(entity);
2971                 }
2972         }
2973
2974         if (alignment == 0) {
2975                 type_t *type = expression->type;
2976                 alignment = get_type_alignment(type);
2977         }
2978
2979         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2980         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
2981         tarval   *tv   = new_tarval_from_long(alignment, mode);
2982         return new_d_Const(dbgi, tv);
2983 }
2984
2985 static void init_ir_types(void);
2986
2987 static tarval *fold_constant_to_tarval(const expression_t *expression)
2988 {
2989         assert(is_type_valid(skip_typeref(expression->base.type)));
2990
2991         bool constant_folding_old = constant_folding;
2992         constant_folding = true;
2993
2994         init_ir_types();
2995
2996         assert(is_constant_expression(expression));
2997
2998         ir_graph *old_current_ir_graph = current_ir_graph;
2999         current_ir_graph = get_const_code_irg();
3000
3001         ir_node *cnst = expression_to_firm(expression);
3002         current_ir_graph = old_current_ir_graph;
3003
3004         if (!is_Const(cnst)) {
3005                 panic("couldn't fold constant");
3006         }
3007
3008         constant_folding = constant_folding_old;
3009
3010         tarval *tv = get_Const_tarval(cnst);
3011         return tv;
3012 }
3013
3014 long fold_constant_to_int(const expression_t *expression)
3015 {
3016         if (expression->kind == EXPR_INVALID)
3017                 return 0;
3018
3019         tarval *tv = fold_constant_to_tarval(expression);
3020         if (!tarval_is_long(tv)) {
3021                 panic("result of constant folding is not integer");
3022         }
3023
3024         return get_tarval_long(tv);
3025 }
3026
3027 bool fold_constant_to_bool(const expression_t *expression)
3028 {
3029         if (expression->kind == EXPR_INVALID)
3030                 return false;
3031         tarval *tv = fold_constant_to_tarval(expression);
3032         return !tarval_is_null(tv);
3033 }
3034
3035 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3036 {
3037         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3038
3039         /* first try to fold a constant condition */
3040         if (is_constant_expression(expression->condition)) {
3041                 bool val = fold_constant_to_bool(expression->condition);
3042                 if (val) {
3043                         expression_t *true_expression = expression->true_expression;
3044                         if (true_expression == NULL)
3045                                 true_expression = expression->condition;
3046                         return expression_to_firm(true_expression);
3047                 } else {
3048                         return expression_to_firm(expression->false_expression);
3049                 }
3050         }
3051
3052         ir_node *cur_block   = get_cur_block();
3053
3054         /* create the true block */
3055         ir_node *true_block  = new_immBlock();
3056         set_cur_block(true_block);
3057
3058         ir_node *true_val = expression->true_expression != NULL ?
3059                 expression_to_firm(expression->true_expression) : NULL;
3060         ir_node *true_jmp = new_Jmp();
3061
3062         /* create the false block */
3063         ir_node *false_block = new_immBlock();
3064         set_cur_block(false_block);
3065
3066         ir_node *false_val = expression_to_firm(expression->false_expression);
3067         ir_node *false_jmp = new_Jmp();
3068
3069         /* create the condition evaluation */
3070         set_cur_block(cur_block);
3071         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3072         if (expression->true_expression == NULL) {
3073                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3074                         true_val = cond_expr;
3075                 } else {
3076                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3077                          * comparison.  Generate a "1" as value for the true branch. */
3078                         true_val = new_Const(get_mode_one(mode_Is));
3079                 }
3080         }
3081         mature_immBlock(true_block);
3082         mature_immBlock(false_block);
3083
3084         /* create the common block */
3085         ir_node *in_cf[2] = { true_jmp, false_jmp };
3086         new_Block(2, in_cf);
3087
3088         /* TODO improve static semantics, so either both or no values are NULL */
3089         if (true_val == NULL || false_val == NULL)
3090                 return NULL;
3091
3092         ir_node *in[2] = { true_val, false_val };
3093         ir_mode *mode  = get_irn_mode(true_val);
3094         assert(get_irn_mode(false_val) == mode);
3095         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3096
3097         return val;
3098 }
3099
3100 /**
3101  * Returns an IR-node representing the address of a field.
3102  */
3103 static ir_node *select_addr(const select_expression_t *expression)
3104 {
3105         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3106
3107         construct_select_compound(expression);
3108
3109         ir_node *compound_addr = expression_to_firm(expression->compound);
3110
3111         entity_t *entry = expression->compound_entry;
3112         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3113         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3114
3115         if (constant_folding) {
3116                 ir_mode *mode = get_irn_mode(compound_addr);
3117                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3118                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3119                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3120         } else {
3121                 ir_entity *irentity = entry->compound_member.entity;
3122                 assert(irentity != NULL);
3123                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3124         }
3125 }
3126
3127 static ir_node *select_to_firm(const select_expression_t *expression)
3128 {
3129         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3130         ir_node  *addr = select_addr(expression);
3131         type_t   *type = revert_automatic_type_conversion(
3132                         (const expression_t*) expression);
3133         type           = skip_typeref(type);
3134
3135         entity_t *entry      = expression->compound_entry;
3136         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3137         type_t   *entry_type = skip_typeref(entry->declaration.type);
3138
3139         if (entry_type->kind == TYPE_BITFIELD) {
3140                 return bitfield_extract_to_firm(expression, addr);
3141         }
3142
3143         return deref_address(dbgi, type, addr);
3144 }
3145
3146 /* Values returned by __builtin_classify_type. */
3147 typedef enum gcc_type_class
3148 {
3149         no_type_class = -1,
3150         void_type_class,
3151         integer_type_class,
3152         char_type_class,
3153         enumeral_type_class,
3154         boolean_type_class,
3155         pointer_type_class,
3156         reference_type_class,
3157         offset_type_class,
3158         real_type_class,
3159         complex_type_class,
3160         function_type_class,
3161         method_type_class,
3162         record_type_class,
3163         union_type_class,
3164         array_type_class,
3165         string_type_class,
3166         set_type_class,
3167         file_type_class,
3168         lang_type_class
3169 } gcc_type_class;
3170
3171 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3172 {
3173         type_t *type = expr->type_expression->base.type;
3174
3175         /* FIXME gcc returns different values depending on whether compiling C or C++
3176          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3177         gcc_type_class tc;
3178         for (;;) {
3179                 type = skip_typeref(type);
3180                 switch (type->kind) {
3181                         case TYPE_ATOMIC: {
3182                                 const atomic_type_t *const atomic_type = &type->atomic;
3183                                 switch (atomic_type->akind) {
3184                                         /* should not be reached */
3185                                         case ATOMIC_TYPE_INVALID:
3186                                                 tc = no_type_class;
3187                                                 goto make_const;
3188
3189                                         /* gcc cannot do that */
3190                                         case ATOMIC_TYPE_VOID:
3191                                                 tc = void_type_class;
3192                                                 goto make_const;
3193
3194                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3195                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3196                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3197                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3198                                         case ATOMIC_TYPE_SHORT:
3199                                         case ATOMIC_TYPE_USHORT:
3200                                         case ATOMIC_TYPE_INT:
3201                                         case ATOMIC_TYPE_UINT:
3202                                         case ATOMIC_TYPE_LONG:
3203                                         case ATOMIC_TYPE_ULONG:
3204                                         case ATOMIC_TYPE_LONGLONG:
3205                                         case ATOMIC_TYPE_ULONGLONG:
3206                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3207                                                 tc = integer_type_class;
3208                                                 goto make_const;
3209
3210                                         case ATOMIC_TYPE_FLOAT:
3211                                         case ATOMIC_TYPE_DOUBLE:
3212                                         case ATOMIC_TYPE_LONG_DOUBLE:
3213                                                 tc = real_type_class;
3214                                                 goto make_const;
3215                                 }
3216                                 panic("Unexpected atomic type in classify_type_to_firm().");
3217                         }
3218
3219                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3220                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3221                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3222                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3223                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3224                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3225                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3226                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3227
3228                         /* gcc handles this as integer */
3229                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3230
3231                         /* gcc classifies the referenced type */
3232                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3233
3234                         case TYPE_BUILTIN:
3235                         /* typedef/typeof should be skipped already */
3236                         case TYPE_TYPEDEF:
3237                         case TYPE_TYPEOF:
3238                         case TYPE_INVALID:
3239                         case TYPE_ERROR:
3240                                 break;
3241                 }
3242                 panic("unexpected TYPE classify_type_to_firm().");
3243         }
3244
3245 make_const:;
3246         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3247         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3248         return new_d_Const(dbgi, tv);
3249 }
3250
3251 static ir_node *function_name_to_firm(
3252                 const funcname_expression_t *const expr)
3253 {
3254         switch(expr->kind) {
3255         case FUNCNAME_FUNCTION:
3256         case FUNCNAME_PRETTY_FUNCTION:
3257         case FUNCNAME_FUNCDNAME:
3258                 if (current_function_name == NULL) {
3259                         const source_position_t *const src_pos = &expr->base.source_position;
3260                         const char    *name  = current_function_entity->base.symbol->string;
3261                         const string_t string = { name, strlen(name) + 1 };
3262                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3263                 }
3264                 return current_function_name;
3265         case FUNCNAME_FUNCSIG:
3266                 if (current_funcsig == NULL) {
3267                         const source_position_t *const src_pos = &expr->base.source_position;
3268                         ir_entity *ent = get_irg_entity(current_ir_graph);
3269                         const char *const name = get_entity_ld_name(ent);
3270                         const string_t string = { name, strlen(name) + 1 };
3271                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3272                 }
3273                 return current_funcsig;
3274         }
3275         panic("Unsupported function name");
3276 }
3277
3278 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3279 {
3280         statement_t *statement = expr->statement;
3281
3282         assert(statement->kind == STATEMENT_COMPOUND);
3283         return compound_statement_to_firm(&statement->compound);
3284 }
3285
3286 static ir_node *va_start_expression_to_firm(
3287         const va_start_expression_t *const expr)
3288 {
3289         type_t    *const type        = current_function_entity->declaration.type;
3290         ir_type   *const method_type = get_ir_type(type);
3291         int        const n           = get_method_n_params(method_type) - 1;
3292         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3293         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3294         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3295         ir_node   *const no_mem      = new_NoMem();
3296         ir_node   *const arg_sel     =
3297                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3298
3299         type_t    *const param_type  = expr->parameter->base.type;
3300         ir_node   *const cnst        = get_type_size_node(param_type);
3301         ir_mode   *const mode        = get_irn_mode(cnst);
3302         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3303         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3304         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3305         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3306         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3307         set_value_for_expression(expr->ap, add);
3308
3309         return NULL;
3310 }
3311
3312 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3313 {
3314         type_t       *const type    = expr->base.type;
3315         expression_t *const ap_expr = expr->ap;
3316         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3317         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3318         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3319         ir_node      *const res     = deref_address(dbgi, type, ap);
3320
3321         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3322         ir_mode      *const mode    = get_irn_mode(cnst);
3323         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3324         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3325         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3326         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3327         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3328
3329         set_value_for_expression_addr(ap_expr, add, ap_addr);
3330
3331         return res;
3332 }
3333
3334 /**
3335  * Generate Firm for a va_copy expression.
3336  */
3337 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3338 {
3339         ir_node *const src = expression_to_firm(expr->src);
3340         set_value_for_expression(expr->dst, src);
3341         return NULL;
3342 }
3343
3344 static ir_node *dereference_addr(const unary_expression_t *const expression)
3345 {
3346         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3347         return expression_to_firm(expression->value);
3348 }
3349
3350 /**
3351  * Returns a IR-node representing an lvalue of the given expression.
3352  */
3353 static ir_node *expression_to_addr(const expression_t *expression)
3354 {
3355         switch(expression->kind) {
3356         case EXPR_ARRAY_ACCESS:
3357                 return array_access_addr(&expression->array_access);
3358         case EXPR_CALL:
3359                 return call_expression_to_firm(&expression->call);
3360         case EXPR_COMPOUND_LITERAL:
3361                 return compound_literal_to_firm(&expression->compound_literal);
3362         case EXPR_REFERENCE:
3363                 return reference_addr(&expression->reference);
3364         case EXPR_SELECT:
3365                 return select_addr(&expression->select);
3366         case EXPR_UNARY_DEREFERENCE:
3367                 return dereference_addr(&expression->unary);
3368         default:
3369                 break;
3370         }
3371         panic("trying to get address of non-lvalue");
3372 }
3373
3374 static ir_node *builtin_constant_to_firm(
3375                 const builtin_constant_expression_t *expression)
3376 {
3377         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3378         long     v;
3379
3380         if (is_constant_expression(expression->value)) {
3381                 v = 1;
3382         } else {
3383                 v = 0;
3384         }
3385         return new_Const_long(mode, v);
3386 }
3387
3388 static ir_node *builtin_types_compatible_to_firm(
3389                 const builtin_types_compatible_expression_t *expression)
3390 {
3391         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3392         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3393         long     const value = types_compatible(left, right) ? 1 : 0;
3394         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3395         return new_Const_long(mode, value);
3396 }
3397
3398 static ir_node *get_label_block(label_t *label)
3399 {
3400         if (label->block != NULL)
3401                 return label->block;
3402
3403         /* beware: might be called from create initializer with current_ir_graph
3404          * set to const_code_irg. */
3405         ir_graph *rem    = current_ir_graph;
3406         current_ir_graph = current_function;
3407
3408         ir_node *block = new_immBlock();
3409
3410         label->block = block;
3411
3412         ARR_APP1(label_t *, all_labels, label);
3413
3414         current_ir_graph = rem;
3415         return block;
3416 }
3417
3418 /**
3419  * Pointer to a label.  This is used for the
3420  * GNU address-of-label extension.
3421  */
3422 static ir_node *label_address_to_firm(
3423                 const label_address_expression_t *label)
3424 {
3425         ir_node    *block = get_label_block(label->label);
3426         ir_label_t  nr    = get_Block_label(block);
3427
3428         if (nr == 0) {
3429                 nr = get_irp_next_label_nr();
3430                 set_Block_label(block, nr);
3431         }
3432         symconst_symbol value;
3433         value.label = nr;
3434         return new_SymConst(mode_P_code, value, symconst_label);
3435 }
3436
3437 /**
3438  * creates firm nodes for an expression. The difference between this function
3439  * and expression_to_firm is, that this version might produce mode_b nodes
3440  * instead of mode_Is.
3441  */
3442 static ir_node *_expression_to_firm(const expression_t *expression)
3443 {
3444 #ifndef NDEBUG
3445         if (!constant_folding) {
3446                 assert(!expression->base.transformed);
3447                 ((expression_t*) expression)->base.transformed = true;
3448         }
3449 #endif
3450
3451         switch (expression->kind) {
3452         case EXPR_CHARACTER_CONSTANT:
3453                 return character_constant_to_firm(&expression->conste);
3454         case EXPR_WIDE_CHARACTER_CONSTANT:
3455                 return wide_character_constant_to_firm(&expression->conste);
3456         case EXPR_CONST:
3457                 return const_to_firm(&expression->conste);
3458         case EXPR_STRING_LITERAL:
3459                 return string_literal_to_firm(&expression->string);
3460         case EXPR_WIDE_STRING_LITERAL:
3461                 return wide_string_literal_to_firm(&expression->wide_string);
3462         case EXPR_REFERENCE:
3463                 return reference_expression_to_firm(&expression->reference);
3464         case EXPR_REFERENCE_ENUM_VALUE:
3465                 return reference_expression_enum_value_to_firm(&expression->reference);
3466         case EXPR_CALL:
3467                 return call_expression_to_firm(&expression->call);
3468         EXPR_UNARY_CASES
3469                 return unary_expression_to_firm(&expression->unary);
3470         EXPR_BINARY_CASES
3471                 return binary_expression_to_firm(&expression->binary);
3472         case EXPR_ARRAY_ACCESS:
3473                 return array_access_to_firm(&expression->array_access);
3474         case EXPR_SIZEOF:
3475                 return sizeof_to_firm(&expression->typeprop);
3476         case EXPR_ALIGNOF:
3477                 return alignof_to_firm(&expression->typeprop);
3478         case EXPR_CONDITIONAL:
3479                 return conditional_to_firm(&expression->conditional);
3480         case EXPR_SELECT:
3481                 return select_to_firm(&expression->select);
3482         case EXPR_CLASSIFY_TYPE:
3483                 return classify_type_to_firm(&expression->classify_type);
3484         case EXPR_FUNCNAME:
3485                 return function_name_to_firm(&expression->funcname);
3486         case EXPR_STATEMENT:
3487                 return statement_expression_to_firm(&expression->statement);
3488         case EXPR_VA_START:
3489                 return va_start_expression_to_firm(&expression->va_starte);
3490         case EXPR_VA_ARG:
3491                 return va_arg_expression_to_firm(&expression->va_arge);
3492         case EXPR_VA_COPY:
3493                 return va_copy_expression_to_firm(&expression->va_copye);
3494         case EXPR_BUILTIN_CONSTANT_P:
3495                 return builtin_constant_to_firm(&expression->builtin_constant);
3496         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3497                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3498         case EXPR_OFFSETOF:
3499                 return offsetof_to_firm(&expression->offsetofe);
3500         case EXPR_COMPOUND_LITERAL:
3501                 return compound_literal_to_firm(&expression->compound_literal);
3502         case EXPR_LABEL_ADDRESS:
3503                 return label_address_to_firm(&expression->label_address);
3504
3505         case EXPR_UNKNOWN:
3506         case EXPR_INVALID:
3507                 break;
3508         }
3509         panic("invalid expression found");
3510 }
3511
3512 /**
3513  * Check if a given expression is a GNU __builtin_expect() call.
3514  */
3515 static bool is_builtin_expect(const expression_t *expression)
3516 {
3517         if (expression->kind != EXPR_CALL)
3518                 return false;
3519
3520         expression_t *function = expression->call.function;
3521         if (function->kind != EXPR_REFERENCE)
3522                 return false;
3523         reference_expression_t *ref = &function->reference;
3524         if (ref->entity->kind         != ENTITY_FUNCTION ||
3525             ref->entity->function.btk != bk_gnu_builtin_expect)
3526                 return false;
3527
3528         return true;
3529 }
3530
3531 static bool produces_mode_b(const expression_t *expression)
3532 {
3533         switch (expression->kind) {
3534         case EXPR_BINARY_EQUAL:
3535         case EXPR_BINARY_NOTEQUAL:
3536         case EXPR_BINARY_LESS:
3537         case EXPR_BINARY_LESSEQUAL:
3538         case EXPR_BINARY_GREATER:
3539         case EXPR_BINARY_GREATEREQUAL:
3540         case EXPR_BINARY_ISGREATER:
3541         case EXPR_BINARY_ISGREATEREQUAL:
3542         case EXPR_BINARY_ISLESS:
3543         case EXPR_BINARY_ISLESSEQUAL:
3544         case EXPR_BINARY_ISLESSGREATER:
3545         case EXPR_BINARY_ISUNORDERED:
3546         case EXPR_UNARY_NOT:
3547                 return true;
3548
3549         case EXPR_CALL:
3550                 if (is_builtin_expect(expression)) {
3551                         expression_t *argument = expression->call.arguments->expression;
3552                         return produces_mode_b(argument);
3553                 }
3554                 return false;
3555         case EXPR_BINARY_COMMA:
3556                 return produces_mode_b(expression->binary.right);
3557
3558         default:
3559                 return false;
3560         }
3561 }
3562
3563 static ir_node *expression_to_firm(const expression_t *expression)
3564 {
3565         if (!produces_mode_b(expression)) {
3566                 ir_node *res = _expression_to_firm(expression);
3567                 assert(res == NULL || get_irn_mode(res) != mode_b);
3568                 return res;
3569         }
3570
3571         if (is_constant_expression(expression)) {
3572                 ir_node *res  = _expression_to_firm(expression);
3573                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3574                 assert(is_Const(res));
3575                 if (is_Const_null(res)) {
3576                         return new_Const_long(mode, 0);
3577                 } else {
3578                         return new_Const_long(mode, 1);
3579                 }
3580         }
3581
3582         /* we have to produce a 0/1 from the mode_b expression */
3583         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3584         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3585         return produce_condition_result(expression, mode, dbgi);
3586 }
3587
3588 /**
3589  * create a short-circuit expression evaluation that tries to construct
3590  * efficient control flow structures for &&, || and ! expressions
3591  */
3592 static ir_node *create_condition_evaluation(const expression_t *expression,
3593                                             ir_node *true_block,
3594                                             ir_node *false_block)
3595 {
3596         switch(expression->kind) {
3597         case EXPR_UNARY_NOT: {
3598                 const unary_expression_t *unary_expression = &expression->unary;
3599                 create_condition_evaluation(unary_expression->value, false_block,
3600                                             true_block);
3601                 return NULL;
3602         }
3603         case EXPR_BINARY_LOGICAL_AND: {
3604                 const binary_expression_t *binary_expression = &expression->binary;
3605
3606                 ir_node *extra_block = new_immBlock();
3607                 create_condition_evaluation(binary_expression->left, extra_block,
3608                                             false_block);
3609                 mature_immBlock(extra_block);
3610                 set_cur_block(extra_block);
3611                 create_condition_evaluation(binary_expression->right, true_block,
3612                                             false_block);
3613                 return NULL;
3614         }
3615         case EXPR_BINARY_LOGICAL_OR: {
3616                 const binary_expression_t *binary_expression = &expression->binary;
3617
3618                 ir_node *extra_block = new_immBlock();
3619                 create_condition_evaluation(binary_expression->left, true_block,
3620                                             extra_block);
3621                 mature_immBlock(extra_block);
3622                 set_cur_block(extra_block);
3623                 create_condition_evaluation(binary_expression->right, true_block,
3624                                             false_block);
3625                 return NULL;
3626         }
3627         default:
3628                 break;
3629         }
3630
3631         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3632         ir_node  *cond_expr  = _expression_to_firm(expression);
3633         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3634         ir_node  *cond       = new_d_Cond(dbgi, condition);
3635         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3636         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3637
3638         /* set branch prediction info based on __builtin_expect */
3639         if (is_builtin_expect(expression) && is_Cond(cond)) {
3640                 call_argument_t *argument = expression->call.arguments->next;
3641                 if (is_constant_expression(argument->expression)) {
3642                         bool             cnst = fold_constant_to_bool(argument->expression);
3643                         cond_jmp_predicate pred;
3644
3645                         if (cnst == false) {
3646                                 pred = COND_JMP_PRED_FALSE;
3647                         } else {
3648                                 pred = COND_JMP_PRED_TRUE;
3649                         }
3650                         set_Cond_jmp_pred(cond, pred);
3651                 }
3652         }
3653
3654         add_immBlock_pred(true_block, true_proj);
3655         add_immBlock_pred(false_block, false_proj);
3656
3657         set_cur_block(NULL);
3658         return cond_expr;
3659 }
3660
3661 static void create_variable_entity(entity_t *variable,
3662                                    declaration_kind_t declaration_kind,
3663                                    ir_type *parent_type)
3664 {
3665         assert(variable->kind == ENTITY_VARIABLE);
3666         type_t    *type = skip_typeref(variable->declaration.type);
3667
3668         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3669         ir_type   *const irtype    = get_ir_type(type);
3670         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3671         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3672         unsigned         alignment = variable->declaration.alignment;
3673
3674         set_entity_alignment(irentity, alignment);
3675
3676         handle_decl_modifiers(irentity, variable);
3677
3678         variable->declaration.kind  = (unsigned char) declaration_kind;
3679         variable->variable.v.entity = irentity;
3680         set_entity_variability(irentity, variability_uninitialized);
3681         set_entity_ld_ident(irentity, create_ld_ident(variable));
3682
3683         if (parent_type == get_tls_type())
3684                 set_entity_allocation(irentity, allocation_automatic);
3685         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3686                 set_entity_allocation(irentity, allocation_static);
3687
3688         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3689                 set_entity_volatility(irentity, volatility_is_volatile);
3690         }
3691 }
3692
3693
3694 typedef struct type_path_entry_t type_path_entry_t;
3695 struct type_path_entry_t {
3696         type_t           *type;
3697         ir_initializer_t *initializer;
3698         size_t            index;
3699         entity_t         *compound_entry;
3700 };
3701
3702 typedef struct type_path_t type_path_t;
3703 struct type_path_t {
3704         type_path_entry_t *path;
3705         type_t            *top_type;
3706         bool               invalid;
3707 };
3708
3709 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3710 {
3711         size_t len = ARR_LEN(path->path);
3712
3713         for (size_t i = 0; i < len; ++i) {
3714                 const type_path_entry_t *entry = & path->path[i];
3715
3716                 type_t *type = skip_typeref(entry->type);
3717                 if (is_type_compound(type)) {
3718                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3719                 } else if (is_type_array(type)) {
3720                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3721                 } else {
3722                         fprintf(stderr, "-INVALID-");
3723                 }
3724         }
3725         fprintf(stderr, "  (");
3726         print_type(path->top_type);
3727         fprintf(stderr, ")");
3728 }
3729
3730 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3731 {
3732         size_t len = ARR_LEN(path->path);
3733         assert(len > 0);
3734         return & path->path[len-1];
3735 }
3736
3737 static type_path_entry_t *append_to_type_path(type_path_t *path)
3738 {
3739         size_t len = ARR_LEN(path->path);
3740         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3741
3742         type_path_entry_t *result = & path->path[len];
3743         memset(result, 0, sizeof(result[0]));
3744         return result;
3745 }
3746
3747 static size_t get_compound_member_count(const compound_type_t *type)
3748 {
3749         compound_t *compound  = type->compound;
3750         size_t      n_members = 0;
3751         entity_t   *member    = compound->members.entities;
3752         for ( ; member != NULL; member = member->base.next) {
3753                 ++n_members;
3754         }
3755
3756         return n_members;
3757 }
3758
3759 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3760 {
3761         type_t *orig_top_type = path->top_type;
3762         type_t *top_type      = skip_typeref(orig_top_type);
3763
3764         assert(is_type_compound(top_type) || is_type_array(top_type));
3765
3766         if (ARR_LEN(path->path) == 0) {
3767                 return NULL;
3768         } else {
3769                 type_path_entry_t *top         = get_type_path_top(path);
3770                 ir_initializer_t  *initializer = top->initializer;
3771                 return get_initializer_compound_value(initializer, top->index);
3772         }
3773 }
3774
3775 static void descend_into_subtype(type_path_t *path)
3776 {
3777         type_t *orig_top_type = path->top_type;
3778         type_t *top_type      = skip_typeref(orig_top_type);
3779
3780         assert(is_type_compound(top_type) || is_type_array(top_type));
3781
3782         ir_initializer_t *initializer = get_initializer_entry(path);
3783
3784         type_path_entry_t *top = append_to_type_path(path);
3785         top->type              = top_type;
3786
3787         size_t len;
3788
3789         if (is_type_compound(top_type)) {
3790                 compound_t *compound = top_type->compound.compound;
3791                 entity_t   *entry    = compound->members.entities;
3792
3793                 top->compound_entry = entry;
3794                 top->index          = 0;
3795                 len                 = get_compound_member_count(&top_type->compound);
3796                 if (entry != NULL) {
3797                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3798                         path->top_type = entry->declaration.type;
3799                 }
3800         } else {
3801                 assert(is_type_array(top_type));
3802                 assert(top_type->array.size > 0);
3803
3804                 top->index     = 0;
3805                 path->top_type = top_type->array.element_type;
3806                 len            = top_type->array.size;
3807         }
3808         if (initializer == NULL
3809                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3810                 initializer = create_initializer_compound(len);
3811                 /* we have to set the entry at the 2nd latest path entry... */
3812                 size_t path_len = ARR_LEN(path->path);
3813                 assert(path_len >= 1);
3814                 if (path_len > 1) {
3815                         type_path_entry_t *entry        = & path->path[path_len-2];
3816                         ir_initializer_t  *tinitializer = entry->initializer;
3817                         set_initializer_compound_value(tinitializer, entry->index,
3818                                                        initializer);
3819                 }
3820         }
3821         top->initializer = initializer;
3822 }
3823
3824 static void ascend_from_subtype(type_path_t *path)
3825 {
3826         type_path_entry_t *top = get_type_path_top(path);
3827
3828         path->top_type = top->type;
3829
3830         size_t len = ARR_LEN(path->path);
3831         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3832 }
3833
3834 static void walk_designator(type_path_t *path, const designator_t *designator)
3835 {
3836         /* designators start at current object type */
3837         ARR_RESIZE(type_path_entry_t, path->path, 1);
3838
3839         for ( ; designator != NULL; designator = designator->next) {
3840                 type_path_entry_t *top         = get_type_path_top(path);
3841                 type_t            *orig_type   = top->type;
3842                 type_t            *type        = skip_typeref(orig_type);
3843
3844                 if (designator->symbol != NULL) {
3845                         assert(is_type_compound(type));
3846                         size_t    index  = 0;
3847                         symbol_t *symbol = designator->symbol;
3848
3849                         compound_t *compound = type->compound.compound;
3850                         entity_t   *iter     = compound->members.entities;
3851                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3852                                 if (iter->base.symbol == symbol) {
3853                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3854                                         break;
3855                                 }
3856                         }
3857                         assert(iter != NULL);
3858
3859                         top->type           = orig_type;
3860                         top->compound_entry = iter;
3861                         top->index          = index;
3862                         orig_type           = iter->declaration.type;
3863                 } else {
3864                         expression_t *array_index = designator->array_index;
3865                         assert(designator->array_index != NULL);
3866                         assert(is_type_array(type));
3867
3868                         long index = fold_constant_to_int(array_index);
3869                         assert(index >= 0);
3870 #ifndef NDEBUG
3871                         if (type->array.size_constant) {
3872                                 long array_size = type->array.size;
3873                                 assert(index < array_size);
3874                         }
3875 #endif
3876
3877                         top->type  = orig_type;
3878                         top->index = (size_t) index;
3879                         orig_type  = type->array.element_type;
3880                 }
3881                 path->top_type = orig_type;
3882
3883                 if (designator->next != NULL) {
3884                         descend_into_subtype(path);
3885                 }
3886         }
3887
3888         path->invalid  = false;
3889 }
3890
3891 static void advance_current_object(type_path_t *path)
3892 {
3893         if (path->invalid) {
3894                 /* TODO: handle this... */
3895                 panic("invalid initializer in ast2firm (excessive elements)");
3896         }
3897
3898         type_path_entry_t *top = get_type_path_top(path);
3899
3900         type_t *type = skip_typeref(top->type);
3901         if (is_type_union(type)) {
3902                 top->compound_entry = NULL;
3903         } else if (is_type_struct(type)) {
3904                 entity_t *entry = top->compound_entry;
3905
3906                 top->index++;
3907                 entry               = entry->base.next;
3908                 top->compound_entry = entry;
3909                 if (entry != NULL) {
3910                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3911                         path->top_type = entry->declaration.type;
3912                         return;
3913                 }
3914         } else {
3915                 assert(is_type_array(type));
3916
3917                 top->index++;
3918                 if (!type->array.size_constant || top->index < type->array.size) {
3919                         return;
3920                 }
3921         }
3922
3923         /* we're past the last member of the current sub-aggregate, try if we
3924          * can ascend in the type hierarchy and continue with another subobject */
3925         size_t len = ARR_LEN(path->path);
3926
3927         if (len > 1) {
3928                 ascend_from_subtype(path);
3929                 advance_current_object(path);
3930         } else {
3931                 path->invalid = true;
3932         }
3933 }
3934
3935
3936 static ir_initializer_t *create_ir_initializer(
3937                 const initializer_t *initializer, type_t *type);
3938
3939 static ir_initializer_t *create_ir_initializer_value(
3940                 const initializer_value_t *initializer)
3941 {
3942         if (is_type_compound(initializer->value->base.type)) {
3943                 panic("initializer creation for compounds not implemented yet");
3944         }
3945         ir_node *value = expression_to_firm(initializer->value);
3946         type_t  *type  = initializer->value->base.type;
3947         ir_mode *mode  = get_ir_mode_storage(type);
3948         value          = create_conv(NULL, value, mode);
3949         return create_initializer_const(value);
3950 }
3951
3952 /** test wether type can be initialized by a string constant */
3953 static bool is_string_type(type_t *type)
3954 {
3955         type_t *inner;
3956         if (is_type_pointer(type)) {
3957                 inner = skip_typeref(type->pointer.points_to);
3958         } else if(is_type_array(type)) {
3959                 inner = skip_typeref(type->array.element_type);
3960         } else {
3961                 return false;
3962         }
3963
3964         return is_type_integer(inner);
3965 }
3966
3967 static ir_initializer_t *create_ir_initializer_list(
3968                 const initializer_list_t *initializer, type_t *type)
3969 {
3970         type_path_t path;
3971         memset(&path, 0, sizeof(path));
3972         path.top_type = type;
3973         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3974
3975         descend_into_subtype(&path);
3976
3977         for (size_t i = 0; i < initializer->len; ++i) {
3978                 const initializer_t *sub_initializer = initializer->initializers[i];
3979
3980                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3981                         walk_designator(&path, sub_initializer->designator.designator);
3982                         continue;
3983                 }
3984
3985                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3986                         /* we might have to descend into types until we're at a scalar
3987                          * type */
3988                         while(true) {
3989                                 type_t *orig_top_type = path.top_type;
3990                                 type_t *top_type      = skip_typeref(orig_top_type);
3991
3992                                 if (is_type_scalar(top_type))
3993                                         break;
3994                                 descend_into_subtype(&path);
3995                         }
3996                 } else if (sub_initializer->kind == INITIALIZER_STRING
3997                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3998                         /* we might have to descend into types until we're at a scalar
3999                          * type */
4000                         while (true) {
4001                                 type_t *orig_top_type = path.top_type;
4002                                 type_t *top_type      = skip_typeref(orig_top_type);
4003
4004                                 if (is_string_type(top_type))
4005                                         break;
4006                                 descend_into_subtype(&path);
4007                         }
4008                 }
4009
4010                 ir_initializer_t *sub_irinitializer
4011                         = create_ir_initializer(sub_initializer, path.top_type);
4012
4013                 size_t path_len = ARR_LEN(path.path);
4014                 assert(path_len >= 1);
4015                 type_path_entry_t *entry        = & path.path[path_len-1];
4016                 ir_initializer_t  *tinitializer = entry->initializer;
4017                 set_initializer_compound_value(tinitializer, entry->index,
4018                                                sub_irinitializer);
4019
4020                 advance_current_object(&path);
4021         }
4022
4023         assert(ARR_LEN(path.path) >= 1);
4024         ir_initializer_t *result = path.path[0].initializer;
4025         DEL_ARR_F(path.path);
4026
4027         return result;
4028 }
4029
4030 static ir_initializer_t *create_ir_initializer_string(
4031                 const initializer_string_t *initializer, type_t *type)
4032 {
4033         type = skip_typeref(type);
4034
4035         size_t            string_len    = initializer->string.size;
4036         assert(type->kind == TYPE_ARRAY);
4037         assert(type->array.size_constant);
4038         size_t            len           = type->array.size;
4039         ir_initializer_t *irinitializer = create_initializer_compound(len);
4040
4041         const char *string = initializer->string.begin;
4042         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4043
4044         for (size_t i = 0; i < len; ++i) {
4045                 char c = 0;
4046                 if (i < string_len)
4047                         c = string[i];
4048
4049                 tarval           *tv = new_tarval_from_long(c, mode);
4050                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4051
4052                 set_initializer_compound_value(irinitializer, i, char_initializer);
4053         }
4054
4055         return irinitializer;
4056 }
4057
4058 static ir_initializer_t *create_ir_initializer_wide_string(
4059                 const initializer_wide_string_t *initializer, type_t *type)
4060 {
4061         size_t            string_len    = initializer->string.size;
4062         assert(type->kind == TYPE_ARRAY);
4063         assert(type->array.size_constant);
4064         size_t            len           = type->array.size;
4065         ir_initializer_t *irinitializer = create_initializer_compound(len);
4066
4067         const wchar_rep_t *string = initializer->string.begin;
4068         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
4069
4070         for (size_t i = 0; i < len; ++i) {
4071                 wchar_rep_t c = 0;
4072                 if (i < string_len) {
4073                         c = string[i];
4074                 }
4075                 tarval *tv = new_tarval_from_long(c, mode);
4076                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4077
4078                 set_initializer_compound_value(irinitializer, i, char_initializer);
4079         }
4080
4081         return irinitializer;
4082 }
4083
4084 static ir_initializer_t *create_ir_initializer(
4085                 const initializer_t *initializer, type_t *type)
4086 {
4087         switch(initializer->kind) {
4088                 case INITIALIZER_STRING:
4089                         return create_ir_initializer_string(&initializer->string, type);
4090
4091                 case INITIALIZER_WIDE_STRING:
4092                         return create_ir_initializer_wide_string(&initializer->wide_string,
4093                                                                  type);
4094
4095                 case INITIALIZER_LIST:
4096                         return create_ir_initializer_list(&initializer->list, type);
4097
4098                 case INITIALIZER_VALUE:
4099                         return create_ir_initializer_value(&initializer->value);
4100
4101                 case INITIALIZER_DESIGNATOR:
4102                         panic("unexpected designator initializer found");
4103         }
4104         panic("unknown initializer");
4105 }
4106
4107 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
4108                 ir_node *base_addr)
4109 {
4110         if (is_atomic_type(type)) {
4111                 ir_mode *mode = get_type_mode(type);
4112                 tarval  *zero = get_mode_null(mode);
4113                 ir_node *cnst = new_d_Const(dbgi, zero);
4114
4115                 /* TODO: bitfields */
4116                 ir_node *mem    = get_store();
4117                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4118                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4119                 set_store(proj_m);
4120         } else {
4121                 assert(is_compound_type(type));
4122
4123                 int n_members;
4124                 if (is_Array_type(type)) {
4125                         assert(has_array_upper_bound(type, 0));
4126                         n_members = get_array_upper_bound_int(type, 0);
4127                 } else {
4128                         n_members = get_compound_n_members(type);
4129                 }
4130
4131                 for (int i = 0; i < n_members; ++i) {
4132                         ir_node *addr;
4133                         ir_type *irtype;
4134                         if (is_Array_type(type)) {
4135                                 ir_entity *entity   = get_array_element_entity(type);
4136                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4137                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4138                                 ir_node   *in[1]    = { cnst };
4139                                 irtype = get_array_element_type(type);
4140                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
4141                         } else {
4142                                 ir_entity *member = get_compound_member(type, i);
4143
4144                                 irtype = get_entity_type(member);
4145                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
4146                         }
4147
4148                         create_dynamic_null_initializer(irtype, dbgi, addr);
4149                 }
4150         }
4151 }
4152
4153 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4154                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4155 {
4156         switch(get_initializer_kind(initializer)) {
4157         case IR_INITIALIZER_NULL: {
4158                 create_dynamic_null_initializer(type, dbgi, base_addr);
4159                 return;
4160         }
4161         case IR_INITIALIZER_CONST: {
4162                 ir_node *node     = get_initializer_const_value(initializer);
4163                 ir_mode *mode     = get_irn_mode(node);
4164                 ir_type *ent_type = get_entity_type(entity);
4165
4166                 /* is it a bitfield type? */
4167                 if (is_Primitive_type(ent_type) &&
4168                                 get_primitive_base_type(ent_type) != NULL) {
4169                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4170                         return;
4171                 }
4172
4173                 assert(get_type_mode(type) == mode);
4174                 ir_node *mem    = get_store();
4175                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4176                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4177                 set_store(proj_m);
4178                 return;
4179         }
4180         case IR_INITIALIZER_TARVAL: {
4181                 tarval  *tv       = get_initializer_tarval_value(initializer);
4182                 ir_mode *mode     = get_tarval_mode(tv);
4183                 ir_node *cnst     = new_d_Const(dbgi, tv);
4184                 ir_type *ent_type = get_entity_type(entity);
4185
4186                 /* is it a bitfield type? */
4187                 if (is_Primitive_type(ent_type) &&
4188                                 get_primitive_base_type(ent_type) != NULL) {
4189                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4190                         return;
4191                 }
4192
4193                 assert(get_type_mode(type) == mode);
4194                 ir_node *mem    = get_store();
4195                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4196                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4197                 set_store(proj_m);
4198                 return;
4199         }
4200         case IR_INITIALIZER_COMPOUND: {
4201                 assert(is_compound_type(type));
4202                 int n_members;
4203                 if (is_Array_type(type)) {
4204                         assert(has_array_upper_bound(type, 0));
4205                         n_members = get_array_upper_bound_int(type, 0);
4206                 } else {
4207                         n_members = get_compound_n_members(type);
4208                 }
4209
4210                 if (get_initializer_compound_n_entries(initializer)
4211                                 != (unsigned) n_members)
4212                         panic("initializer doesn't match compound type");
4213
4214                 for (int i = 0; i < n_members; ++i) {
4215                         ir_node   *addr;
4216                         ir_type   *irtype;
4217                         ir_entity *sub_entity;
4218                         if (is_Array_type(type)) {
4219                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4220                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4221                                 ir_node   *in[1]    = { cnst };
4222                                 irtype     = get_array_element_type(type);
4223                                 sub_entity = get_array_element_entity(type);
4224                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4225                                                        sub_entity);
4226                         } else {
4227                                 sub_entity = get_compound_member(type, i);
4228                                 irtype     = get_entity_type(sub_entity);
4229                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4230                                                              sub_entity);
4231                         }
4232
4233                         ir_initializer_t *sub_init
4234                                 = get_initializer_compound_value(initializer, i);
4235
4236                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4237                                                        addr);
4238                 }
4239                 return;
4240         }
4241         }
4242
4243         panic("invalid IR_INITIALIZER found");
4244 }
4245
4246 static void create_dynamic_initializer(ir_initializer_t *initializer,
4247                 dbg_info *dbgi, ir_entity *entity)
4248 {
4249         ir_node *frame     = get_irg_frame(current_ir_graph);
4250         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4251         ir_type *type      = get_entity_type(entity);
4252
4253         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4254 }
4255
4256 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4257                                      ir_entity *entity, type_t *type)
4258 {
4259         ir_node *memory = get_store();
4260         ir_node *nomem  = new_NoMem();
4261         ir_node *frame  = get_irg_frame(current_ir_graph);
4262         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4263
4264         if (initializer->kind == INITIALIZER_VALUE) {
4265                 initializer_value_t *initializer_value = &initializer->value;
4266
4267                 ir_node *value = expression_to_firm(initializer_value->value);
4268                 type = skip_typeref(type);
4269                 assign_value(dbgi, addr, type, value);
4270                 return;
4271         }
4272
4273         if (!is_constant_initializer(initializer)) {
4274                 ir_initializer_t *irinitializer
4275                         = create_ir_initializer(initializer, type);
4276
4277                 create_dynamic_initializer(irinitializer, dbgi, entity);
4278                 return;
4279         }
4280
4281         /* create the ir_initializer */
4282         ir_graph *const old_current_ir_graph = current_ir_graph;
4283         current_ir_graph = get_const_code_irg();
4284
4285         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4286
4287         assert(current_ir_graph == get_const_code_irg());
4288         current_ir_graph = old_current_ir_graph;
4289
4290         /* create a "template" entity which is copied to the entity on the stack */
4291         ident     *const id          = id_unique("initializer.%u");
4292         ir_type   *const irtype      = get_ir_type(type);
4293         ir_type   *const global_type = get_glob_type();
4294         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4295         set_entity_ld_ident(init_entity, id);
4296
4297         set_entity_variability(init_entity, variability_initialized);
4298         set_entity_visibility(init_entity, visibility_local);
4299         set_entity_allocation(init_entity, allocation_static);
4300
4301         set_entity_initializer(init_entity, irinitializer);
4302
4303         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4304         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4305
4306         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4307         set_store(copyb_mem);
4308 }
4309
4310 static void create_initializer_local_variable_entity(entity_t *entity)
4311 {
4312         assert(entity->kind == ENTITY_VARIABLE);
4313         initializer_t *initializer = entity->variable.initializer;
4314         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4315         ir_entity     *irentity    = entity->variable.v.entity;
4316         type_t        *type        = entity->declaration.type;
4317
4318         create_local_initializer(initializer, dbgi, irentity, type);
4319 }
4320
4321 static void create_variable_initializer(entity_t *entity)
4322 {
4323         assert(entity->kind == ENTITY_VARIABLE);
4324         initializer_t *initializer = entity->variable.initializer;
4325         if (initializer == NULL)
4326                 return;
4327
4328         declaration_kind_t declaration_kind
4329                 = (declaration_kind_t) entity->declaration.kind;
4330         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4331                 create_initializer_local_variable_entity(entity);
4332                 return;
4333         }
4334
4335         type_t            *type = entity->declaration.type;
4336         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4337
4338         if (initializer->kind == INITIALIZER_VALUE) {
4339                 initializer_value_t *initializer_value = &initializer->value;
4340                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4341
4342                 ir_node *value = expression_to_firm(initializer_value->value);
4343
4344                 type_t  *type = initializer_value->value->base.type;
4345                 ir_mode *mode = get_ir_mode_storage(type);
4346                 value = create_conv(dbgi, value, mode);
4347                 value = do_strict_conv(dbgi, value);
4348
4349                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4350                         set_value(entity->variable.v.value_number, value);
4351                 } else {
4352                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4353
4354                         ir_entity *irentity = entity->variable.v.entity;
4355
4356                         if (tq & TYPE_QUALIFIER_CONST) {
4357                                 set_entity_variability(irentity, variability_constant);
4358                         } else {
4359                                 set_entity_variability(irentity, variability_initialized);
4360                         }
4361                         set_atomic_ent_value(irentity, value);
4362                 }
4363         } else {
4364                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4365                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4366
4367                 ir_entity        *irentity        = entity->variable.v.entity;
4368                 ir_initializer_t *irinitializer
4369                         = create_ir_initializer(initializer, type);
4370
4371                 if (tq & TYPE_QUALIFIER_CONST) {
4372                         set_entity_variability(irentity, variability_constant);
4373                 } else {
4374                         set_entity_variability(irentity, variability_initialized);
4375                 }
4376                 set_entity_initializer(irentity, irinitializer);
4377         }
4378 }
4379
4380 static void create_variable_length_array(entity_t *entity)
4381 {
4382         assert(entity->kind == ENTITY_VARIABLE);
4383         assert(entity->variable.initializer == NULL);
4384
4385         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4386         entity->variable.v.vla_base = NULL;
4387
4388         /* TODO: record VLA somewhere so we create the free node when we leave
4389          * it's scope */
4390 }
4391
4392 static void allocate_variable_length_array(entity_t *entity)
4393 {
4394         assert(entity->kind == ENTITY_VARIABLE);
4395         assert(entity->variable.initializer == NULL);
4396         assert(get_cur_block() != NULL);
4397
4398         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4399         type_t   *type      = entity->declaration.type;
4400         ir_type  *el_type   = get_ir_type(type->array.element_type);
4401
4402         /* make sure size_node is calculated */
4403         get_type_size_node(type);
4404         ir_node  *elems = type->array.size_node;
4405         ir_node  *mem   = get_store();
4406         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4407
4408         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4409         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4410         set_store(proj_m);
4411
4412         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4413         entity->variable.v.vla_base = addr;
4414 }
4415
4416 /**
4417  * Creates a Firm local variable from a declaration.
4418  */
4419 static void create_local_variable(entity_t *entity)
4420 {
4421         assert(entity->kind == ENTITY_VARIABLE);
4422         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4423
4424         bool needs_entity = entity->variable.address_taken;
4425         type_t *type = skip_typeref(entity->declaration.type);
4426
4427         /* is it a variable length array? */
4428         if (is_type_array(type) && !type->array.size_constant) {
4429                 create_variable_length_array(entity);
4430                 return;
4431         } else if (is_type_array(type) || is_type_compound(type)) {
4432                 needs_entity = true;
4433         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4434                 needs_entity = true;
4435         }
4436
4437         if (needs_entity) {
4438                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4439                 create_variable_entity(entity,
4440                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4441                                        frame_type);
4442         } else {
4443                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4444                 entity->variable.v.value_number = next_value_number_function;
4445                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4446                                         entity);
4447                 ++next_value_number_function;
4448         }
4449 }
4450
4451 static void create_local_static_variable(entity_t *entity)
4452 {
4453         assert(entity->kind == ENTITY_VARIABLE);
4454         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4455
4456         type_t   *type           = skip_typeref(entity->declaration.type);
4457         ir_type  *const var_type = entity->variable.thread_local ?
4458                 get_tls_type() : get_glob_type();
4459         ir_type  *const irtype   = get_ir_type(type);
4460         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4461
4462         size_t l = strlen(entity->base.symbol->string);
4463         char   buf[l + sizeof(".%u")];
4464         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4465         ident     *const id = id_unique(buf);
4466
4467         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4468
4469         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4470                 set_entity_volatility(irentity, volatility_is_volatile);
4471         }
4472
4473         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4474         entity->variable.v.entity = irentity;
4475
4476         set_entity_ld_ident(irentity, id);
4477         set_entity_variability(irentity, variability_uninitialized);
4478         set_entity_visibility(irentity, visibility_local);
4479         set_entity_allocation(irentity, entity->variable.thread_local ?
4480                 allocation_automatic : allocation_static);
4481
4482         ir_graph *const old_current_ir_graph = current_ir_graph;
4483         current_ir_graph = get_const_code_irg();
4484
4485         create_variable_initializer(entity);
4486
4487         assert(current_ir_graph == get_const_code_irg());
4488         current_ir_graph = old_current_ir_graph;
4489 }
4490
4491
4492
4493 static void return_statement_to_firm(return_statement_t *statement)
4494 {
4495         if (get_cur_block() == NULL)
4496                 return;
4497
4498         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4499         type_t   *type        = current_function_entity->declaration.type;
4500         ir_type  *func_irtype = get_ir_type(type);
4501
4502
4503         ir_node *in[1];
4504         int      in_len;
4505         if (get_method_n_ress(func_irtype) > 0) {
4506                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4507
4508                 if (statement->value != NULL) {
4509                         ir_node *node = expression_to_firm(statement->value);
4510                         if (!is_compound_type(res_type)) {
4511                                 type_t  *type = statement->value->base.type;
4512                                 ir_mode *mode = get_ir_mode_storage(type);
4513                                 node          = create_conv(dbgi, node, mode);
4514                                 node          = do_strict_conv(dbgi, node);
4515                         }
4516                         in[0] = node;
4517                 } else {
4518                         ir_mode *mode;
4519                         if (is_compound_type(res_type)) {
4520                                 mode = mode_P_data;
4521                         } else {
4522                                 mode = get_type_mode(res_type);
4523                         }
4524                         in[0] = new_Unknown(mode);
4525                 }
4526                 in_len = 1;
4527         } else {
4528                 /* build return_value for its side effects */
4529                 if (statement->value != NULL) {
4530                         expression_to_firm(statement->value);
4531                 }
4532                 in_len = 0;
4533         }
4534
4535         ir_node  *store = get_store();
4536         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4537
4538         ir_node *end_block = get_irg_end_block(current_ir_graph);
4539         add_immBlock_pred(end_block, ret);
4540
4541         set_cur_block(NULL);
4542 }
4543
4544 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4545 {
4546         if (get_cur_block() == NULL)
4547                 return NULL;
4548
4549         return expression_to_firm(statement->expression);
4550 }
4551
4552 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4553 {
4554         entity_t *entity = compound->scope.entities;
4555         for ( ; entity != NULL; entity = entity->base.next) {
4556                 if (!is_declaration(entity))
4557                         continue;
4558
4559                 create_local_declaration(entity);
4560         }
4561
4562         ir_node     *result    = NULL;
4563         statement_t *statement = compound->statements;
4564         for ( ; statement != NULL; statement = statement->base.next) {
4565                 if (statement->base.next == NULL
4566                                 && statement->kind == STATEMENT_EXPRESSION) {
4567                         result = expression_statement_to_firm(
4568                                         &statement->expression);
4569                         break;
4570                 }
4571                 statement_to_firm(statement);
4572         }
4573
4574         return result;
4575 }
4576
4577 static void create_global_variable(entity_t *entity)
4578 {
4579         assert(entity->kind == ENTITY_VARIABLE);
4580
4581         ir_visibility vis;
4582         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4583                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4584                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4585                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4586
4587                 default: panic("Invalid storage class for global variable");
4588         }
4589
4590         ir_type *var_type = entity->variable.thread_local ?
4591                 get_tls_type() : get_glob_type();
4592         create_variable_entity(entity,
4593                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4594         set_entity_visibility(entity->variable.v.entity, vis);
4595 }
4596
4597 static void create_local_declaration(entity_t *entity)
4598 {
4599         assert(is_declaration(entity));
4600
4601         /* construct type */
4602         (void) get_ir_type(entity->declaration.type);
4603         if (entity->base.symbol == NULL) {
4604                 return;
4605         }
4606
4607         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4608         case STORAGE_CLASS_STATIC:
4609                 create_local_static_variable(entity);
4610                 return;
4611         case STORAGE_CLASS_EXTERN:
4612                 if (entity->kind == ENTITY_FUNCTION) {
4613                         assert(entity->function.statement == NULL);
4614                         (void)get_function_entity(entity, NULL);
4615                 } else {
4616                         create_global_variable(entity);
4617                         create_variable_initializer(entity);
4618                 }
4619                 return;
4620         case STORAGE_CLASS_NONE:
4621         case STORAGE_CLASS_AUTO:
4622         case STORAGE_CLASS_REGISTER:
4623                 if (entity->kind == ENTITY_FUNCTION) {
4624                         if (entity->function.statement != NULL) {
4625                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4626                                 (void)get_function_entity(entity, owner);
4627                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4628                                 enqueue_inner_function(entity);
4629                         } else {
4630                                 (void)get_function_entity(entity, NULL);
4631                         }
4632                 } else {
4633                         create_local_variable(entity);
4634                 }
4635                 return;
4636         case STORAGE_CLASS_TYPEDEF:
4637                 break;
4638         }
4639         panic("invalid storage class found");
4640 }
4641
4642 static void initialize_local_declaration(entity_t *entity)
4643 {
4644         if (entity->base.symbol == NULL)
4645                 return;
4646
4647         // no need to emit code in dead blocks
4648         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4649                         && get_cur_block() == NULL)
4650                 return;
4651
4652         switch ((declaration_kind_t) entity->declaration.kind) {
4653         case DECLARATION_KIND_LOCAL_VARIABLE:
4654         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4655                 create_variable_initializer(entity);
4656                 return;
4657
4658         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4659                 allocate_variable_length_array(entity);
4660                 return;
4661
4662         case DECLARATION_KIND_COMPOUND_MEMBER:
4663         case DECLARATION_KIND_GLOBAL_VARIABLE:
4664         case DECLARATION_KIND_FUNCTION:
4665         case DECLARATION_KIND_INNER_FUNCTION:
4666                 return;
4667
4668         case DECLARATION_KIND_PARAMETER:
4669         case DECLARATION_KIND_PARAMETER_ENTITY:
4670                 panic("can't initialize parameters");
4671
4672         case DECLARATION_KIND_UNKNOWN:
4673                 panic("can't initialize unknown declaration");
4674         }
4675         panic("invalid declaration kind");
4676 }
4677
4678 static void declaration_statement_to_firm(declaration_statement_t *statement)
4679 {
4680         entity_t *entity = statement->declarations_begin;
4681         if (entity == NULL)
4682                 return;
4683
4684         entity_t *const last = statement->declarations_end;
4685         for ( ;; entity = entity->base.next) {
4686                 if (is_declaration(entity)) {
4687                         initialize_local_declaration(entity);
4688                 } else if (entity->kind == ENTITY_TYPEDEF) {
4689                         /* §6.7.7:3  Any array size expressions associated with variable length
4690                          * array declarators are evaluated each time the declaration of the
4691                          * typedef name is reached in the order of execution. */
4692                         type_t *const type = skip_typeref(entity->typedefe.type);
4693                         if (is_type_array(type) && type->array.is_vla)
4694                                 get_vla_size(&type->array);
4695                 }
4696                 if (entity == last)
4697                         break;
4698         }
4699 }
4700
4701 static void if_statement_to_firm(if_statement_t *statement)
4702 {
4703         ir_node *cur_block = get_cur_block();
4704
4705         ir_node *fallthrough_block = NULL;
4706
4707         /* the true (blocks) */
4708         ir_node *true_block = NULL;
4709         if (statement->true_statement != NULL) {
4710                 true_block = new_immBlock();
4711                 set_cur_block(true_block);
4712                 statement_to_firm(statement->true_statement);
4713                 if (get_cur_block() != NULL) {
4714                         ir_node *jmp = new_Jmp();
4715                         if (fallthrough_block == NULL)
4716                                 fallthrough_block = new_immBlock();
4717                         add_immBlock_pred(fallthrough_block, jmp);
4718                 }
4719         }
4720
4721         /* the false (blocks) */
4722         ir_node *false_block = NULL;
4723         if (statement->false_statement != NULL) {
4724                 false_block = new_immBlock();
4725                 set_cur_block(false_block);
4726
4727                 statement_to_firm(statement->false_statement);
4728                 if (get_cur_block() != NULL) {
4729                         ir_node *jmp = new_Jmp();
4730                         if (fallthrough_block == NULL)
4731                                 fallthrough_block = new_immBlock();
4732                         add_immBlock_pred(fallthrough_block, jmp);
4733                 }
4734         }
4735
4736         /* create the condition */
4737         if (cur_block != NULL) {
4738                 if (true_block == NULL || false_block == NULL) {
4739                         if (fallthrough_block == NULL)
4740                                 fallthrough_block = new_immBlock();
4741                         if (true_block == NULL)
4742                                 true_block = fallthrough_block;
4743                         if (false_block == NULL)
4744                                 false_block = fallthrough_block;
4745                 }
4746
4747                 set_cur_block(cur_block);
4748                 create_condition_evaluation(statement->condition, true_block,
4749                                             false_block);
4750         }
4751
4752         mature_immBlock(true_block);
4753         if (false_block != fallthrough_block && false_block != NULL) {
4754                 mature_immBlock(false_block);
4755         }
4756         if (fallthrough_block != NULL) {
4757                 mature_immBlock(fallthrough_block);
4758         }
4759
4760         set_cur_block(fallthrough_block);
4761 }
4762
4763 static void while_statement_to_firm(while_statement_t *statement)
4764 {
4765         ir_node *jmp = NULL;
4766         if (get_cur_block() != NULL) {
4767                 jmp = new_Jmp();
4768         }
4769
4770         /* create the header block */
4771         ir_node *header_block = new_immBlock();
4772         if (jmp != NULL) {
4773                 add_immBlock_pred(header_block, jmp);
4774         }
4775
4776         /* the loop body */
4777         ir_node *old_continue_label = continue_label;
4778         ir_node *old_break_label    = break_label;
4779         continue_label              = header_block;
4780         break_label                 = NULL;
4781
4782         ir_node *body_block = new_immBlock();
4783         set_cur_block(body_block);
4784         statement_to_firm(statement->body);
4785         ir_node *false_block = break_label;
4786
4787         assert(continue_label == header_block);
4788         continue_label = old_continue_label;
4789         break_label    = old_break_label;
4790
4791         if (get_cur_block() != NULL) {
4792                 jmp = new_Jmp();
4793                 add_immBlock_pred(header_block, jmp);
4794         }
4795
4796         /* shortcut for while(true) */
4797         if (is_constant_expression(statement->condition)
4798                         && fold_constant_to_bool(statement->condition) != 0) {
4799                 set_cur_block(header_block);
4800                 ir_node *header_jmp = new_Jmp();
4801                 add_immBlock_pred(body_block, header_jmp);
4802
4803                 keep_alive(body_block);
4804                 keep_all_memory(body_block);
4805                 set_cur_block(body_block);
4806         } else {
4807                 if (false_block == NULL) {
4808                         false_block = new_immBlock();
4809                 }
4810
4811                 /* create the condition */
4812                 set_cur_block(header_block);
4813
4814                 create_condition_evaluation(statement->condition, body_block,
4815                                             false_block);
4816         }
4817
4818         mature_immBlock(body_block);
4819         mature_immBlock(header_block);
4820         if (false_block != NULL) {
4821                 mature_immBlock(false_block);
4822         }
4823
4824         set_cur_block(false_block);
4825 }
4826
4827 static void do_while_statement_to_firm(do_while_statement_t *statement)
4828 {
4829         ir_node *jmp = NULL;
4830         if (get_cur_block() != NULL) {
4831                 jmp = new_Jmp();
4832         }
4833
4834         /* create the header block */
4835         ir_node *header_block = new_immBlock();
4836
4837         /* the loop body */
4838         ir_node *body_block = new_immBlock();
4839         if (jmp != NULL) {
4840                 add_immBlock_pred(body_block, jmp);
4841         }
4842
4843         ir_node *old_continue_label = continue_label;
4844         ir_node *old_break_label    = break_label;
4845         continue_label              = header_block;
4846         break_label                 = NULL;
4847
4848         set_cur_block(body_block);
4849         statement_to_firm(statement->body);
4850         ir_node *false_block = break_label;
4851
4852         assert(continue_label == header_block);
4853         continue_label = old_continue_label;
4854         break_label    = old_break_label;
4855
4856         if (get_cur_block() != NULL) {
4857                 ir_node *body_jmp = new_Jmp();
4858                 add_immBlock_pred(header_block, body_jmp);
4859                 mature_immBlock(header_block);
4860         }
4861
4862         if (false_block == NULL) {
4863                 false_block = new_immBlock();
4864         }
4865
4866         /* create the condition */
4867         set_cur_block(header_block);
4868
4869         create_condition_evaluation(statement->condition, body_block, false_block);
4870         mature_immBlock(body_block);
4871         mature_immBlock(header_block);
4872         mature_immBlock(false_block);
4873
4874         set_cur_block(false_block);
4875 }
4876
4877 static void for_statement_to_firm(for_statement_t *statement)
4878 {
4879         ir_node *jmp = NULL;
4880
4881         /* create declarations */
4882         entity_t *entity = statement->scope.entities;
4883         for ( ; entity != NULL; entity = entity->base.next) {
4884                 if (!is_declaration(entity))
4885                         continue;
4886
4887                 create_local_declaration(entity);
4888         }
4889
4890         if (get_cur_block() != NULL) {
4891                 entity = statement->scope.entities;
4892                 for ( ; entity != NULL; entity = entity->base.next) {
4893                         if (!is_declaration(entity))
4894                                 continue;
4895
4896                         initialize_local_declaration(entity);
4897                 }
4898
4899                 if (statement->initialisation != NULL) {
4900                         expression_to_firm(statement->initialisation);
4901                 }
4902
4903                 jmp = new_Jmp();
4904         }
4905
4906
4907         /* create the step block */
4908         ir_node *const step_block = new_immBlock();
4909         set_cur_block(step_block);
4910         if (statement->step != NULL) {
4911                 expression_to_firm(statement->step);
4912         }
4913         ir_node *const step_jmp = new_Jmp();
4914
4915         /* create the header block */
4916         ir_node *const header_block = new_immBlock();
4917         set_cur_block(header_block);
4918         if (jmp != NULL) {
4919                 add_immBlock_pred(header_block, jmp);
4920         }
4921         add_immBlock_pred(header_block, step_jmp);
4922
4923         /* the false block */
4924         ir_node *const false_block = new_immBlock();
4925
4926         /* the loop body */
4927         ir_node *body_block;
4928         if (statement->body != NULL) {
4929                 ir_node *const old_continue_label = continue_label;
4930                 ir_node *const old_break_label    = break_label;
4931                 continue_label = step_block;
4932                 break_label    = false_block;
4933
4934                 body_block = new_immBlock();
4935                 set_cur_block(body_block);
4936                 statement_to_firm(statement->body);
4937
4938                 assert(continue_label == step_block);
4939                 assert(break_label    == false_block);
4940                 continue_label = old_continue_label;
4941                 break_label    = old_break_label;
4942
4943                 if (get_cur_block() != NULL) {
4944                         jmp = new_Jmp();
4945                         add_immBlock_pred(step_block, jmp);
4946                 }
4947         } else {
4948                 body_block = step_block;
4949         }
4950
4951         /* create the condition */
4952         set_cur_block(header_block);
4953         if (statement->condition != NULL) {
4954                 create_condition_evaluation(statement->condition, body_block,
4955                                             false_block);
4956         } else {
4957                 keep_alive(header_block);
4958                 keep_all_memory(header_block);
4959                 jmp = new_Jmp();
4960                 add_immBlock_pred(body_block, jmp);
4961         }
4962
4963         mature_immBlock(body_block);
4964         mature_immBlock(false_block);
4965         mature_immBlock(step_block);
4966         mature_immBlock(header_block);
4967         mature_immBlock(false_block);
4968
4969         set_cur_block(false_block);
4970 }
4971
4972 static void create_jump_statement(const statement_t *statement,
4973                                   ir_node *target_block)
4974 {
4975         if (get_cur_block() == NULL)
4976                 return;
4977
4978         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4979         ir_node  *jump = new_d_Jmp(dbgi);
4980         add_immBlock_pred(target_block, jump);
4981
4982         set_cur_block(NULL);
4983 }
4984
4985 static ir_node *get_break_label(void)
4986 {
4987         if (break_label == NULL) {
4988                 break_label = new_immBlock();
4989         }
4990         return break_label;
4991 }
4992
4993 static void switch_statement_to_firm(switch_statement_t *statement)
4994 {
4995         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4996
4997         ir_node *expression  = expression_to_firm(statement->expression);
4998         ir_node *cond        = new_d_Cond(dbgi, expression);
4999
5000         set_cur_block(NULL);
5001
5002         ir_node *const old_switch_cond       = current_switch_cond;
5003         ir_node *const old_break_label       = break_label;
5004         const bool     old_saw_default_label = saw_default_label;
5005         saw_default_label                    = false;
5006         current_switch_cond                  = cond;
5007         break_label                          = NULL;
5008         switch_statement_t *const old_switch = current_switch;
5009         current_switch                       = statement;
5010
5011         /* determine a free number for the default label */
5012         unsigned long num_cases = 0;
5013         long def_nr = 0;
5014         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5015                 if (l->expression == NULL) {
5016                         /* default case */
5017                         continue;
5018                 }
5019                 if (l->last_case >= l->first_case)
5020                         num_cases += l->last_case - l->first_case + 1;
5021                 if (l->last_case > def_nr)
5022                         def_nr = l->last_case;
5023         }
5024
5025         if (def_nr == INT_MAX) {
5026                 /* Bad: an overflow will occur, we cannot be sure that the
5027                  * maximum + 1 is a free number. Scan the values a second
5028                  * time to find a free number.
5029                  */
5030                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5031
5032                 memset(bits, 0, (num_cases + 7) >> 3);
5033                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5034                         if (l->expression == NULL) {
5035                                 /* default case */
5036                                 continue;
5037                         }
5038                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5039                         if (start < num_cases && l->last_case >= 0) {
5040                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5041                                         (unsigned long)l->last_case : num_cases - 1;
5042                                 for (unsigned long cns = start; cns <= end; ++cns) {
5043                                         bits[cns >> 3] |= (1 << (cns & 7));
5044                                 }
5045                         }
5046                 }
5047                 /* We look at the first num_cases constants:
5048                  * Either they are dense, so we took the last (num_cases)
5049                  * one, or they are not dense, so we will find one free
5050                  * there...
5051                  */
5052                 unsigned long i;
5053                 for (i = 0; i < num_cases; ++i)
5054                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5055                                 break;
5056
5057                 free(bits);
5058                 def_nr = i;
5059         } else {
5060                 ++def_nr;
5061         }
5062         statement->default_proj_nr = def_nr;
5063
5064         if (statement->body != NULL) {
5065                 statement_to_firm(statement->body);
5066         }
5067
5068         if (get_cur_block() != NULL) {
5069                 ir_node *jmp = new_Jmp();
5070                 add_immBlock_pred(get_break_label(), jmp);
5071         }
5072
5073         if (!saw_default_label) {
5074                 set_cur_block(get_nodes_block(cond));
5075                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
5076                                                         statement->default_proj_nr);
5077                 add_immBlock_pred(get_break_label(), proj);
5078         }
5079
5080         if (break_label != NULL) {
5081                 mature_immBlock(break_label);
5082         }
5083         set_cur_block(break_label);
5084
5085         assert(current_switch_cond == cond);
5086         current_switch      = old_switch;
5087         current_switch_cond = old_switch_cond;
5088         break_label         = old_break_label;
5089         saw_default_label   = old_saw_default_label;
5090 }
5091
5092 static void case_label_to_firm(const case_label_statement_t *statement)
5093 {
5094         if (statement->is_empty_range)
5095                 return;
5096
5097         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5098
5099         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5100
5101         ir_node *proj;
5102         ir_node *block     = new_immBlock();
5103
5104         set_cur_block(get_nodes_block(current_switch_cond));
5105         if (statement->expression != NULL) {
5106                 long pn     = statement->first_case;
5107                 long end_pn = statement->last_case;
5108                 assert(pn <= end_pn);
5109                 /* create jumps for all cases in the given range */
5110                 do {
5111                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5112                         add_immBlock_pred(block, proj);
5113                 } while (pn++ < end_pn);
5114         } else {
5115                 saw_default_label = true;
5116                 proj = new_d_defaultProj(dbgi, current_switch_cond,
5117                                          current_switch->default_proj_nr);
5118
5119                 add_immBlock_pred(block, proj);
5120         }
5121
5122         if (fallthrough != NULL) {
5123                 add_immBlock_pred(block, fallthrough);
5124         }
5125         mature_immBlock(block);
5126         set_cur_block(block);
5127
5128         if (statement->statement != NULL) {
5129                 statement_to_firm(statement->statement);
5130         }
5131 }
5132
5133 static void label_to_firm(const label_statement_t *statement)
5134 {
5135         ir_node *block = get_label_block(statement->label);
5136
5137         if (get_cur_block() != NULL) {
5138                 ir_node *jmp = new_Jmp();
5139                 add_immBlock_pred(block, jmp);
5140         }
5141
5142         set_cur_block(block);
5143         keep_alive(block);
5144         keep_all_memory(block);
5145
5146         if (statement->statement != NULL) {
5147                 statement_to_firm(statement->statement);
5148         }
5149 }
5150
5151 static void goto_to_firm(const goto_statement_t *statement)
5152 {
5153         if (get_cur_block() == NULL)
5154                 return;
5155
5156         if (statement->expression) {
5157                 ir_node  *irn  = expression_to_firm(statement->expression);
5158                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5159                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5160
5161                 set_irn_link(ijmp, ijmp_list);
5162                 ijmp_list = ijmp;
5163         } else {
5164                 ir_node *block = get_label_block(statement->label);
5165                 ir_node *jmp   = new_Jmp();
5166                 add_immBlock_pred(block, jmp);
5167         }
5168         set_cur_block(NULL);
5169 }
5170
5171 static void asm_statement_to_firm(const asm_statement_t *statement)
5172 {
5173         bool needs_memory = false;
5174
5175         if (statement->is_volatile) {
5176                 needs_memory = true;
5177         }
5178
5179         size_t         n_clobbers = 0;
5180         asm_clobber_t *clobber    = statement->clobbers;
5181         for ( ; clobber != NULL; clobber = clobber->next) {
5182                 const char *clobber_str = clobber->clobber.begin;
5183
5184                 if (!be_is_valid_clobber(clobber_str)) {
5185                         errorf(&statement->base.source_position,
5186                                    "invalid clobber '%s' specified", clobber->clobber);
5187                         continue;
5188                 }
5189
5190                 if (strcmp(clobber_str, "memory") == 0) {
5191                         needs_memory = true;
5192                         continue;
5193                 }
5194
5195                 ident *id = new_id_from_str(clobber_str);
5196                 obstack_ptr_grow(&asm_obst, id);
5197                 ++n_clobbers;
5198         }
5199         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5200         ident **clobbers = NULL;
5201         if (n_clobbers > 0) {
5202                 clobbers = obstack_finish(&asm_obst);
5203         }
5204
5205         size_t n_inputs  = 0;
5206         asm_argument_t *argument = statement->inputs;
5207         for ( ; argument != NULL; argument = argument->next)
5208                 n_inputs++;
5209         size_t n_outputs = 0;
5210         argument = statement->outputs;
5211         for ( ; argument != NULL; argument = argument->next)
5212                 n_outputs++;
5213
5214         unsigned next_pos = 0;
5215
5216         ir_node *ins[n_inputs + n_outputs + 1];
5217         size_t   in_size = 0;
5218
5219         ir_asm_constraint tmp_in_constraints[n_outputs];
5220
5221         const expression_t *out_exprs[n_outputs];
5222         ir_node            *out_addrs[n_outputs];
5223         size_t              out_size = 0;
5224
5225         argument = statement->outputs;
5226         for ( ; argument != NULL; argument = argument->next) {
5227                 const char *constraints = argument->constraints.begin;
5228                 asm_constraint_flags_t asm_flags
5229                         = be_parse_asm_constraints(constraints);
5230
5231                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5232                         warningf(&statement->base.source_position,
5233                                "some constraints in '%s' are not supported", constraints);
5234                 }
5235                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5236                         errorf(&statement->base.source_position,
5237                                "some constraints in '%s' are invalid", constraints);
5238                         continue;
5239                 }
5240                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5241                         errorf(&statement->base.source_position,
5242                                "no write flag specified for output constraints '%s'",
5243                                constraints);
5244                         continue;
5245                 }
5246
5247                 unsigned pos = next_pos++;
5248                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5249                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5250                         expression_t *expr = argument->expression;
5251                         ir_node      *addr = expression_to_addr(expr);
5252                         /* in+output, construct an artifical same_as constraint on the
5253                          * input */
5254                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5255                                 char     buf[64];
5256                                 ir_node *value = get_value_from_lvalue(expr, addr);
5257
5258                                 snprintf(buf, sizeof(buf), "%u", pos);
5259
5260                                 ir_asm_constraint constraint;
5261                                 constraint.pos              = pos;
5262                                 constraint.constraint       = new_id_from_str(buf);
5263                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5264                                 tmp_in_constraints[in_size] = constraint;
5265                                 ins[in_size] = value;
5266
5267                                 ++in_size;
5268                         }
5269
5270                         out_exprs[out_size] = expr;
5271                         out_addrs[out_size] = addr;
5272                         ++out_size;
5273                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5274                         /* pure memory ops need no input (but we have to make sure we
5275                          * attach to the memory) */
5276                         assert(! (asm_flags &
5277                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5278                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5279                         needs_memory = true;
5280
5281                         /* we need to attach the address to the inputs */
5282                         expression_t *expr = argument->expression;
5283
5284                         ir_asm_constraint constraint;
5285                         constraint.pos              = pos;
5286                         constraint.constraint       = new_id_from_str(constraints);
5287                         constraint.mode             = NULL;
5288                         tmp_in_constraints[in_size] = constraint;
5289
5290                         ins[in_size]          = expression_to_addr(expr);
5291                         ++in_size;
5292                         continue;
5293                 } else {
5294                         errorf(&statement->base.source_position,
5295                                "only modifiers but no place set in constraints '%s'",
5296                                constraints);
5297                         continue;
5298                 }
5299
5300                 ir_asm_constraint constraint;
5301                 constraint.pos        = pos;
5302                 constraint.constraint = new_id_from_str(constraints);
5303                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5304
5305                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5306         }
5307         assert(obstack_object_size(&asm_obst)
5308                         == out_size * sizeof(ir_asm_constraint));
5309         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5310
5311
5312         obstack_grow(&asm_obst, tmp_in_constraints,
5313                      in_size * sizeof(tmp_in_constraints[0]));
5314         /* find and count input and output arguments */
5315         argument = statement->inputs;
5316         for ( ; argument != NULL; argument = argument->next) {
5317                 const char *constraints = argument->constraints.begin;
5318                 asm_constraint_flags_t asm_flags
5319                         = be_parse_asm_constraints(constraints);
5320
5321                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5322                         errorf(&statement->base.source_position,
5323                                "some constraints in '%s' are not supported", constraints);
5324                         continue;
5325                 }
5326                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5327                         errorf(&statement->base.source_position,
5328                                "some constraints in '%s' are invalid", constraints);
5329                         continue;
5330                 }
5331                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5332                         errorf(&statement->base.source_position,
5333                                "write flag specified for input constraints '%s'",
5334                                constraints);
5335                         continue;
5336                 }
5337
5338                 ir_node *input;
5339                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5340                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5341                         /* we can treat this as "normal" input */
5342                         input = expression_to_firm(argument->expression);
5343                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5344                         /* pure memory ops need no input (but we have to make sure we
5345                          * attach to the memory) */
5346                         assert(! (asm_flags &
5347                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5348                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5349                         needs_memory = true;
5350                         input = expression_to_addr(argument->expression);
5351                 } else {
5352                         errorf(&statement->base.source_position,
5353                                "only modifiers but no place set in constraints '%s'",
5354                                constraints);
5355                         continue;
5356                 }
5357
5358                 ir_asm_constraint constraint;
5359                 constraint.pos        = next_pos++;
5360                 constraint.constraint = new_id_from_str(constraints);
5361                 constraint.mode       = get_irn_mode(input);
5362
5363                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5364                 ins[in_size++] = input;
5365         }
5366
5367         if (needs_memory) {
5368                 ir_asm_constraint constraint;
5369                 constraint.pos        = next_pos++;
5370                 constraint.constraint = new_id_from_str("");
5371                 constraint.mode       = mode_M;
5372
5373                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5374                 ins[in_size++] = get_store();
5375         }
5376
5377         assert(obstack_object_size(&asm_obst)
5378                         == in_size * sizeof(ir_asm_constraint));
5379         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5380
5381         /* create asm node */
5382         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5383
5384         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5385
5386         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5387                                   out_size, output_constraints,
5388                                   n_clobbers, clobbers, asm_text);
5389
5390         if (statement->is_volatile) {
5391                 set_irn_pinned(node, op_pin_state_pinned);
5392         } else {
5393                 set_irn_pinned(node, op_pin_state_floats);
5394         }
5395
5396         /* create output projs & connect them */
5397         if (needs_memory) {
5398                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5399                 set_store(projm);
5400         }
5401
5402         size_t i;
5403         for (i = 0; i < out_size; ++i) {
5404                 const expression_t *out_expr = out_exprs[i];
5405                 long                pn       = i;
5406                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5407                 ir_node            *proj     = new_Proj(node, mode, pn);
5408                 ir_node            *addr     = out_addrs[i];
5409
5410                 set_value_for_expression_addr(out_expr, proj, addr);
5411         }
5412 }
5413
5414 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5415 {
5416         statement_to_firm(statement->try_statement);
5417         warningf(&statement->base.source_position, "structured exception handling ignored");
5418 }
5419
5420 static void     leave_statement_to_firm(leave_statement_t *statement)
5421 {
5422         errorf(&statement->base.source_position, "__leave not supported yet");
5423 }
5424
5425 /**
5426  * Transform a statement.
5427  */
5428 static void statement_to_firm(statement_t *statement)
5429 {
5430 #ifndef NDEBUG
5431         assert(!statement->base.transformed);
5432         statement->base.transformed = true;
5433 #endif
5434
5435         switch (statement->kind) {
5436         case STATEMENT_INVALID:
5437                 panic("invalid statement found");
5438         case STATEMENT_EMPTY:
5439                 /* nothing */
5440                 return;
5441         case STATEMENT_COMPOUND:
5442                 compound_statement_to_firm(&statement->compound);
5443                 return;
5444         case STATEMENT_RETURN:
5445                 return_statement_to_firm(&statement->returns);
5446                 return;
5447         case STATEMENT_EXPRESSION:
5448                 expression_statement_to_firm(&statement->expression);
5449                 return;
5450         case STATEMENT_IF:
5451                 if_statement_to_firm(&statement->ifs);
5452                 return;
5453         case STATEMENT_WHILE:
5454                 while_statement_to_firm(&statement->whiles);
5455                 return;
5456         case STATEMENT_DO_WHILE:
5457                 do_while_statement_to_firm(&statement->do_while);
5458                 return;
5459         case STATEMENT_DECLARATION:
5460                 declaration_statement_to_firm(&statement->declaration);
5461                 return;
5462         case STATEMENT_BREAK:
5463                 create_jump_statement(statement, get_break_label());
5464                 return;
5465         case STATEMENT_CONTINUE:
5466                 create_jump_statement(statement, continue_label);
5467                 return;
5468         case STATEMENT_SWITCH:
5469                 switch_statement_to_firm(&statement->switchs);
5470                 return;
5471         case STATEMENT_CASE_LABEL:
5472                 case_label_to_firm(&statement->case_label);
5473                 return;
5474         case STATEMENT_FOR:
5475                 for_statement_to_firm(&statement->fors);
5476                 return;
5477         case STATEMENT_LABEL:
5478                 label_to_firm(&statement->label);
5479                 return;
5480         case STATEMENT_GOTO:
5481                 goto_to_firm(&statement->gotos);
5482                 return;
5483         case STATEMENT_ASM:
5484                 asm_statement_to_firm(&statement->asms);
5485                 return;
5486         case STATEMENT_MS_TRY:
5487                 ms_try_statement_to_firm(&statement->ms_try);
5488                 return;
5489         case STATEMENT_LEAVE:
5490                 leave_statement_to_firm(&statement->leave);
5491                 return;
5492         }
5493         panic("statement not implemented");
5494 }
5495
5496 static int count_local_variables(const entity_t *entity,
5497                                  const entity_t *const last)
5498 {
5499         int count = 0;
5500         entity_t const *const end = last != NULL ? last->base.next : NULL;
5501         for (; entity != end; entity = entity->base.next) {
5502                 type_t *type;
5503                 bool    address_taken;
5504
5505                 if (entity->kind == ENTITY_VARIABLE) {
5506                         type          = skip_typeref(entity->declaration.type);
5507                         address_taken = entity->variable.address_taken;
5508                 } else if (entity->kind == ENTITY_PARAMETER) {
5509                         type          = skip_typeref(entity->declaration.type);
5510                         address_taken = entity->parameter.address_taken;
5511                 } else {
5512                         continue;
5513                 }
5514
5515                 if (!address_taken && is_type_scalar(type))
5516                         ++count;
5517         }
5518         return count;
5519 }
5520
5521 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5522 {
5523         int *const count = env;
5524
5525         switch (stmt->kind) {
5526         case STATEMENT_DECLARATION: {
5527                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5528                 *count += count_local_variables(decl_stmt->declarations_begin,
5529                                 decl_stmt->declarations_end);
5530                 break;
5531         }
5532
5533         case STATEMENT_FOR:
5534                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5535                 break;
5536
5537         default:
5538                 break;
5539         }
5540 }
5541
5542 /**
5543  * Return the number of local (alias free) variables used by a function.
5544  */
5545 static int get_function_n_local_vars(entity_t *entity)
5546 {
5547         const function_t *function = &entity->function;
5548         int count = 0;
5549
5550         /* count parameters */
5551         count += count_local_variables(function->parameters.entities, NULL);
5552
5553         /* count local variables declared in body */
5554         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5555         return count;
5556 }
5557
5558 /**
5559  * Build Firm code for the parameters of a function.
5560  */
5561 static void initialize_function_parameters(entity_t *entity)
5562 {
5563         assert(entity->kind == ENTITY_FUNCTION);
5564         ir_graph *irg             = current_ir_graph;
5565         ir_node  *args            = get_irg_args(irg);
5566         ir_node  *start_block     = get_irg_start_block(irg);
5567         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5568         int      first_param_nr   = 0;
5569
5570         if (entity->function.need_closure) {
5571                 /* add an extra parameter for the static link */
5572                 entity->function.static_link = new_r_Proj(irg, start_block, args, mode_P_data, 0);
5573                 ++first_param_nr;
5574         }
5575
5576         int       n         = 0;
5577         entity_t *parameter = entity->function.parameters.entities;
5578         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5579                 if (parameter->kind != ENTITY_PARAMETER)
5580                         continue;
5581
5582                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5583                 type_t *type = skip_typeref(parameter->declaration.type);
5584
5585                 bool needs_entity = parameter->parameter.address_taken;
5586                 assert(!is_type_array(type));
5587                 if (is_type_compound(type)) {
5588                         needs_entity = true;
5589                 }
5590
5591                 if (needs_entity) {
5592                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5593                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5594                         set_entity_ident(entity, id);
5595
5596                         parameter->declaration.kind
5597                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5598                         parameter->parameter.v.entity = entity;
5599                         continue;
5600                 }
5601
5602                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5603                 ir_mode *param_mode   = get_type_mode(param_irtype);
5604
5605                 long     pn    = n + first_param_nr;
5606                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5607
5608                 ir_mode *mode = get_ir_mode_storage(type);
5609                 value = create_conv(NULL, value, mode);
5610                 value = do_strict_conv(NULL, value);
5611
5612                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5613                 parameter->parameter.v.value_number = next_value_number_function;
5614                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5615                                         parameter);
5616                 ++next_value_number_function;
5617
5618                 set_value(parameter->parameter.v.value_number, value);
5619         }
5620 }
5621
5622 /**
5623  * Handle additional decl modifiers for IR-graphs
5624  *
5625  * @param irg            the IR-graph
5626  * @param dec_modifiers  additional modifiers
5627  */
5628 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5629                                      decl_modifiers_t decl_modifiers)
5630 {
5631         if (decl_modifiers & DM_RETURNS_TWICE) {
5632                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5633                 set_irg_additional_property(irg, mtp_property_returns_twice);
5634         }
5635         if (decl_modifiers & DM_NORETURN) {
5636                 /* TRUE if the declaration includes the Microsoft
5637                    __declspec(noreturn) specifier. */
5638                 set_irg_additional_property(irg, mtp_property_noreturn);
5639         }
5640         if (decl_modifiers & DM_NOTHROW) {
5641                 /* TRUE if the declaration includes the Microsoft
5642                    __declspec(nothrow) specifier. */
5643                 set_irg_additional_property(irg, mtp_property_nothrow);
5644         }
5645         if (decl_modifiers & DM_NAKED) {
5646                 /* TRUE if the declaration includes the Microsoft
5647                    __declspec(naked) specifier. */
5648                 set_irg_additional_property(irg, mtp_property_naked);
5649         }
5650         if (decl_modifiers & DM_FORCEINLINE) {
5651                 /* TRUE if the declaration includes the
5652                    Microsoft __forceinline specifier. */
5653                 set_irg_inline_property(irg, irg_inline_forced);
5654         }
5655         if (decl_modifiers & DM_NOINLINE) {
5656                 /* TRUE if the declaration includes the Microsoft
5657                    __declspec(noinline) specifier. */
5658                 set_irg_inline_property(irg, irg_inline_forbidden);
5659         }
5660 }
5661
5662 static void add_function_pointer(ir_type *segment, ir_entity *method,
5663                                  const char *unique_template)
5664 {
5665         ir_type   *method_type  = get_entity_type(method);
5666         ident     *id           = id_unique(unique_template);
5667         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5668
5669         ident     *ide          = id_unique(unique_template);
5670         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5671         ir_graph  *irg          = get_const_code_irg();
5672         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5673                                                            method, NULL);
5674
5675         set_entity_compiler_generated(ptr, 1);
5676         set_entity_variability(ptr, variability_constant);
5677         set_atomic_ent_value(ptr, val);
5678 }
5679
5680 /**
5681  * Generate possible IJmp branches to a given label block.
5682  */
5683 static void gen_ijmp_branches(ir_node *block)
5684 {
5685         ir_node *ijmp;
5686         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5687                 add_immBlock_pred(block, ijmp);
5688         }
5689 }
5690
5691 /**
5692  * Create code for a function and all inner functions.
5693  *
5694  * @param entity  the function entity
5695  */
5696 static void create_function(entity_t *entity)
5697 {
5698         assert(entity->kind == ENTITY_FUNCTION);
5699         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5700
5701         if (entity->function.statement == NULL)
5702                 return;
5703
5704         if (is_main(entity) && firm_opt.os_support == OS_SUPPORT_MINGW) {
5705                 prepare_main_collect2(entity);
5706         }
5707
5708         inner_functions     = NULL;
5709         current_trampolines = NULL;
5710
5711         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5712                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5713                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5714         }
5715         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5716                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5717                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5718         }
5719
5720         current_function_entity = entity;
5721         current_function_name   = NULL;
5722         current_funcsig         = NULL;
5723
5724         assert(all_labels == NULL);
5725         all_labels = NEW_ARR_F(label_t *, 0);
5726         ijmp_list  = NULL;
5727
5728         int       n_local_vars = get_function_n_local_vars(entity);
5729         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5730
5731         ir_graph *old_current_function = current_function;
5732         current_function = irg;
5733
5734         set_irg_fp_model(irg, firm_opt.fp_model);
5735         tarval_enable_fp_ops(1);
5736         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5737
5738         ir_node *first_block = get_cur_block();
5739
5740         /* set inline flags */
5741         if (entity->function.is_inline)
5742                 set_irg_inline_property(irg, irg_inline_recomended);
5743         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5744
5745         next_value_number_function = 0;
5746         initialize_function_parameters(entity);
5747         current_static_link = entity->function.static_link;
5748
5749         statement_to_firm(entity->function.statement);
5750
5751         ir_node *end_block = get_irg_end_block(irg);
5752
5753         /* do we have a return statement yet? */
5754         if (get_cur_block() != NULL) {
5755                 type_t *type = skip_typeref(entity->declaration.type);
5756                 assert(is_type_function(type));
5757                 const function_type_t *func_type   = &type->function;
5758                 const type_t          *return_type
5759                         = skip_typeref(func_type->return_type);
5760
5761                 ir_node *ret;
5762                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5763                         ret = new_Return(get_store(), 0, NULL);
5764                 } else {
5765                         ir_mode *mode;
5766                         if (is_type_scalar(return_type)) {
5767                                 mode = get_ir_mode_storage(func_type->return_type);
5768                         } else {
5769                                 mode = mode_P_data;
5770                         }
5771
5772                         ir_node *in[1];
5773                         /* §5.1.2.2.3 main implicitly returns 0 */
5774                         if (is_main(entity)) {
5775                                 in[0] = new_Const(get_mode_null(mode));
5776                         } else {
5777                                 in[0] = new_Unknown(mode);
5778                         }
5779                         ret = new_Return(get_store(), 1, in);
5780                 }
5781                 add_immBlock_pred(end_block, ret);
5782         }
5783
5784         bool has_computed_gotos = false;
5785         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5786                 label_t *label = all_labels[i];
5787                 if (label->address_taken) {
5788                         gen_ijmp_branches(label->block);
5789                         has_computed_gotos = true;
5790                 }
5791                 mature_immBlock(label->block);
5792         }
5793         if (has_computed_gotos) {
5794                 /* if we have computed goto's in the function, we cannot inline it */
5795                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5796                         warningf(&entity->base.source_position,
5797                                  "function '%Y' can never be inlined because it contains a computed goto",
5798                                  entity->base.symbol);
5799                 }
5800                 set_irg_inline_property(irg, irg_inline_forbidden);
5801         }
5802
5803         DEL_ARR_F(all_labels);
5804         all_labels = NULL;
5805
5806         mature_immBlock(first_block);
5807         mature_immBlock(end_block);
5808
5809         irg_finalize_cons(irg);
5810
5811         /* finalize the frame type */
5812         ir_type *frame_type = get_irg_frame_type(irg);
5813         int      n          = get_compound_n_members(frame_type);
5814         int      align_all  = 4;
5815         int      offset     = 0;
5816         for (int i = 0; i < n; ++i) {
5817                 ir_entity *entity      = get_compound_member(frame_type, i);
5818                 ir_type   *entity_type = get_entity_type(entity);
5819
5820                 int align = get_type_alignment_bytes(entity_type);
5821                 if (align > align_all)
5822                         align_all = align;
5823                 int misalign = 0;
5824                 if (align > 0) {
5825                         misalign  = offset % align;
5826                         if (misalign > 0) {
5827                                 offset += align - misalign;
5828                         }
5829                 }
5830
5831                 set_entity_offset(entity, offset);
5832                 offset += get_type_size_bytes(entity_type);
5833         }
5834         set_type_size_bytes(frame_type, offset);
5835         set_type_alignment_bytes(frame_type, align_all);
5836
5837         irg_vrfy(irg);
5838         current_function = old_current_function;
5839
5840         if (current_trampolines != NULL) {
5841                 DEL_ARR_F(current_trampolines);
5842                 current_trampolines = NULL;
5843         }
5844
5845         /* create inner functions if any */
5846         entity_t **inner = inner_functions;
5847         if (inner != NULL) {
5848                 ir_type *rem_outer_frame      = current_outer_frame;
5849                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5850                 ir_type *rem_outer_value_type = current_outer_value_type;
5851                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5852                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5853                         create_function(inner[i]);
5854                 }
5855                 DEL_ARR_F(inner);
5856
5857                 current_outer_value_type = rem_outer_value_type;
5858                 current_outer_frame      = rem_outer_frame;
5859         }
5860 }
5861
5862 static void scope_to_firm(scope_t *scope)
5863 {
5864         /* first pass: create declarations */
5865         entity_t *entity = scope->entities;
5866         for ( ; entity != NULL; entity = entity->base.next) {
5867                 if (entity->base.symbol == NULL)
5868                         continue;
5869
5870                 if (entity->kind == ENTITY_FUNCTION) {
5871                         if (entity->function.btk != bk_none) {
5872                                 /* builtins have no representation */
5873                                 continue;
5874                         }
5875                         (void)get_function_entity(entity, NULL);
5876                 } else if (entity->kind == ENTITY_VARIABLE) {
5877                         create_global_variable(entity);
5878                 }
5879         }
5880
5881         /* second pass: create code/initializers */
5882         entity = scope->entities;
5883         for ( ; entity != NULL; entity = entity->base.next) {
5884                 if (entity->base.symbol == NULL)
5885                         continue;
5886
5887                 if (entity->kind == ENTITY_FUNCTION) {
5888                         if (entity->function.btk != bk_none) {
5889                                 /* builtins have no representation */
5890                                 continue;
5891                         }
5892                         create_function(entity);
5893                 } else if (entity->kind == ENTITY_VARIABLE) {
5894                         assert(entity->declaration.kind
5895                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5896                         current_ir_graph = get_const_code_irg();
5897                         create_variable_initializer(entity);
5898                 }
5899         }
5900 }
5901
5902 void init_ast2firm(void)
5903 {
5904         obstack_init(&asm_obst);
5905         init_atomic_modes();
5906
5907         /* OS option must be set to the backend */
5908         switch (firm_opt.os_support) {
5909         case OS_SUPPORT_MINGW:
5910                 create_ld_ident = create_name_win32;
5911                 break;
5912         case OS_SUPPORT_LINUX:
5913                 create_ld_ident = create_name_linux_elf;
5914                 break;
5915         case OS_SUPPORT_MACHO:
5916                 create_ld_ident = create_name_macho;
5917                 break;
5918         default:
5919                 panic("unexpected OS support mode");
5920         }
5921
5922         /* create idents for all known runtime functions */
5923         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5924                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5925         }
5926
5927         entitymap_init(&entitymap);
5928 }
5929
5930 static void init_ir_types(void)
5931 {
5932         static int ir_types_initialized = 0;
5933         if (ir_types_initialized)
5934                 return;
5935         ir_types_initialized = 1;
5936
5937         ir_type_int        = get_ir_type(type_int);
5938         ir_type_char       = get_ir_type(type_char);
5939         ir_type_const_char = get_ir_type(type_const_char);
5940         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5941         ir_type_void       = get_ir_type(type_void);
5942
5943         be_params             = be_get_backend_param();
5944         mode_float_arithmetic = be_params->mode_float_arithmetic;
5945
5946         stack_param_align     = be_params->stack_param_align;
5947 }
5948
5949 void exit_ast2firm(void)
5950 {
5951         entitymap_destroy(&entitymap);
5952         obstack_free(&asm_obst, NULL);
5953 }
5954
5955 static void global_asm_to_firm(statement_t *s)
5956 {
5957         for (; s != NULL; s = s->base.next) {
5958                 assert(s->kind == STATEMENT_ASM);
5959
5960                 char const *const text = s->asms.asm_text.begin;
5961                 size_t            size = s->asms.asm_text.size;
5962
5963                 /* skip the last \0 */
5964                 if (text[size - 1] == '\0')
5965                         --size;
5966
5967                 ident *const id = new_id_from_chars(text, size);
5968                 add_irp_asm(id);
5969         }
5970 }
5971
5972 void translation_unit_to_firm(translation_unit_t *unit)
5973 {
5974         /* just to be sure */
5975         continue_label           = NULL;
5976         break_label              = NULL;
5977         current_switch_cond      = NULL;
5978         current_translation_unit = unit;
5979
5980         init_ir_types();
5981
5982         scope_to_firm(&unit->scope);
5983         global_asm_to_firm(unit->global_asm);
5984
5985         current_ir_graph         = NULL;
5986         current_translation_unit = NULL;
5987 }