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 static bool       initializer_use_bitfield_basetype;
  83
  84 extern bool       have_const_functions;
  85
  86 static const entity_t     *current_function_entity;
  87 static ir_node            *current_function_name;
  88 static ir_node            *current_funcsig;
  89 static switch_statement_t *current_switch;
  90 static ir_graph           *current_function;
  91 static translation_unit_t *current_translation_unit;
  92 static trampoline_region  *current_trampolines;
  93 static ir_type            *current_outer_frame;
  94 static ir_type            *current_outer_value_type;
  95 static ir_node            *current_static_link;
  96
  97 static entitymap_t  entitymap;
  98
  99 static struct obstack asm_obst;
 100
 101 typedef enum declaration_kind_t {
 102         DECLARATION_KIND_UNKNOWN,
 103         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 104         DECLARATION_KIND_GLOBAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 107         DECLARATION_KIND_PARAMETER,
 108         DECLARATION_KIND_PARAMETER_ENTITY,
 109         DECLARATION_KIND_FUNCTION,
 110         DECLARATION_KIND_COMPOUND_MEMBER,
 111         DECLARATION_KIND_INNER_FUNCTION
 112 } declaration_kind_t;
 113
 114 static ir_mode *get_ir_mode_storage(type_t *type);
 115 /*
 116  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 117  * int that it returns bigger modes for floating point on some platforms
 118  * (x87 internally does arithemtic with 80bits)
 119  */
 120 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 121
 122 static ir_type *get_ir_type_incomplete(type_t *type);
 123
 124 static void enqueue_inner_function(entity_t *entity)
 125 {
 126         if (inner_functions == NULL)
 127                 inner_functions = NEW_ARR_F(entity_t *, 0);
 128         ARR_APP1(entity_t*, inner_functions, entity);
 129 }
 130
 131 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 132 {
 133         const entity_t *entity = get_irg_loc_description(irg, pos);
 134
 135         if (entity != NULL) {
 136                 warningf(&entity->base.source_position,
 137                          "%s '%#T' might be used uninitialized",
 138                          get_entity_kind_name(entity->kind),
 139                          entity->declaration.type, entity->base.symbol);
 140         }
 141         return new_r_Unknown(irg, mode);
 142 }
 143
 144 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 145 {
 146         const source_position_t *pos = (const source_position_t*) dbg;
 147         if (pos == NULL)
 148                 return 0;
 149         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 150                                    pos->linenr);
 151 }
 152
 153 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 154 {
 155         const source_position_t *pos = (const source_position_t*) dbg;
 156         if (pos == NULL)
 157                 return NULL;
 158         if (line != NULL)
 159                 *line = pos->linenr;
 160         return pos->input_name;
 161 }
 162
 163 static dbg_info *get_dbg_info(const source_position_t *pos)
 164 {
 165         return (dbg_info*) pos;
 166 }
 167
 168 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 169
 170 static ir_mode *mode_int, *mode_uint;
 171
 172 static ir_node *_expression_to_firm(const expression_t *expression);
 173 static ir_node *expression_to_firm(const expression_t *expression);
 174 static void create_local_declaration(entity_t *entity);
 175
 176 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 177 {
 178         unsigned flags = get_atomic_type_flags(kind);
 179         unsigned size  = get_atomic_type_size(kind);
 180         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 181                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 182                 char            name[64];
 183                 ir_mode_sort    sort;
 184                 unsigned        bit_size     = size * 8;
 185                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 186                 unsigned        modulo_shift;
 187                 ir_mode_arithmetic arithmetic;
 188
 189                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 190                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 191                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 192                                  bit_size);
 193                         sort         = irms_int_number;
 194                         arithmetic   = irma_twos_complement;
 195                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 196                 } else {
 197                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 198                         snprintf(name, sizeof(name), "F%u", bit_size);
 199                         sort         = irms_float_number;
 200                         arithmetic   = irma_ieee754;
 201                         modulo_shift = 0;
 202                 }
 203                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 204                                    modulo_shift);
 205         }
 206
 207         return NULL;
 208 }
 209
 210 /**
 211  * Initialises the atomic modes depending on the machine size.
 212  */
 213 static void init_atomic_modes(void)
 214 {
 215         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 216                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 217         }
 218         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 219         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 220
 221         /* there's no real void type in firm */
 222         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 223
 224         /* initialize pointer modes */
 225         char            name[64];
 226         ir_mode_sort    sort         = irms_reference;
 227         unsigned        bit_size     = machine_size;
 228         bool            is_signed    = 0;
 229         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 230         unsigned        modulo_shift
 231                 = bit_size < machine_size ? machine_size : bit_size;
 232
 233         snprintf(name, sizeof(name), "p%u", machine_size);
 234         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 235                                         modulo_shift);
 236
 237         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 238         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 239
 240         /* Hmm, pointers should be machine size */
 241         set_modeP_data(ptr_mode);
 242         set_modeP_code(ptr_mode);
 243 }
 244
 245 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 246 {
 247         assert(kind <= ATOMIC_TYPE_LAST);
 248         return atomic_modes[kind];
 249 }
 250
 251 static ir_node *get_vla_size(array_type_t *const type)
 252 {
 253         ir_node *size_node = type->size_node;
 254         if (size_node == NULL) {
 255                 size_node = expression_to_firm(type->size_expression);
 256                 type->size_node = size_node;
 257         }
 258         return size_node;
 259 }
 260
 261 /**
 262  * Return a node representing the size of a type.
 263  */
 264 static ir_node *get_type_size_node(type_t *type)
 265 {
 266         type = skip_typeref(type);
 267
 268         if (is_type_array(type) && type->array.is_vla) {
 269                 ir_node *size_node = get_vla_size(&type->array);
 270                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 271                 ir_mode *mode      = get_irn_mode(size_node);
 272                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 273                 return real_size;
 274         }
 275
 276         ir_mode *mode = get_ir_mode_storage(type_size_t);
 277         symconst_symbol sym;
 278         sym.type_p = get_ir_type(type);
 279         return new_SymConst(mode, sym, symconst_type_size);
 280 }
 281
 282 static unsigned count_parameters(const function_type_t *function_type)
 283 {
 284         unsigned count = 0;
 285
 286         function_parameter_t *parameter = function_type->parameters;
 287         for ( ; parameter != NULL; parameter = parameter->next) {
 288                 ++count;
 289         }
 290
 291         return count;
 292 }
 293
 294 /**
 295  * Creates a Firm type for an atomic type
 296  */
 297 static ir_type *create_atomic_type(atomic_type_kind_t akind)
 298 {
 299         ir_mode        *mode      = atomic_modes[akind];
 300         ident          *id        = get_mode_ident(mode);
 301         ir_type        *irtype    = new_type_primitive(id, mode);
 302         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 303
 304         set_type_alignment_bytes(irtype, alignment);
 305
 306         return irtype;
 307 }
 308
 309 /**
 310  * Creates a Firm type for a complex type
 311  */
 312 static ir_type *create_complex_type(const complex_type_t *type)
 313 {
 314         atomic_type_kind_t  kind = type->akind;
 315         ir_mode            *mode = atomic_modes[kind];
 316         ident              *id   = get_mode_ident(mode);
 317
 318         (void) id;
 319
 320         /* FIXME: finish the array */
 321         return NULL;
 322 }
 323
 324 /**
 325  * Creates a Firm type for an imaginary type
 326  */
 327 static ir_type *create_imaginary_type(imaginary_type_t *type)
 328 {
 329         atomic_type_kind_t  kind      = type->akind;
 330         ir_mode            *mode      = atomic_modes[kind];
 331         ident              *id        = get_mode_ident(mode);
 332         ir_type            *irtype    = new_type_primitive(id, mode);
 333         il_alignment_t      alignment = get_type_alignment((type_t*) type);
 334
 335         set_type_alignment_bytes(irtype, alignment);
 336
 337         return irtype;
 338 }
 339
 340 /**
 341  * return type of a parameter (and take transparent union gnu extension into
 342  * account)
 343  */
 344 static type_t *get_parameter_type(type_t *orig_type)
 345 {
 346         type_t *type = skip_typeref(orig_type);
 347         if (is_type_union(type)
 348                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 349                 compound_t *compound = type->compound.compound;
 350                 type                 = compound->members.entities->declaration.type;
 351         }
 352
 353         return type;
 354 }
 355
 356 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 357 {
 358         type_t  *return_type  = skip_typeref(function_type->return_type);
 359
 360         ident   *id           = id_unique("functiontype.%u");
 361         int      n_parameters = count_parameters(function_type) + (for_closure ? 1 : 0);
 362         int      n_results    = return_type == type_void ? 0 : 1;
 363         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         if (for_closure) {
 373                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 374                 set_method_param_type(irtype, n, p_irtype);
 375                 ++n;
 376         }
 377         for ( ; parameter != NULL; parameter = parameter->next) {
 378                 type_t  *type     = get_parameter_type(parameter->type);
 379                 ir_type *p_irtype = get_ir_type(type);
 380                 set_method_param_type(irtype, n, p_irtype);
 381                 ++n;
 382         }
 383
 384         bool is_variadic = function_type->variadic;
 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         /* for gcc compatibility we have to produce (dummy) addresses for some
1460          * builtins */
1461         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1462                 if (warning.other) {
1463                         warningf(&ref->base.source_position,
1464                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1465                 }
1466
1467                 /* simply create a NULL pointer */
1468                 ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1469                 ir_node  *res  = new_Const_long(mode, 0);
1470
1471                 return res;
1472         }
1473
1474         switch ((declaration_kind_t) entity->declaration.kind) {
1475         case DECLARATION_KIND_UNKNOWN:
1476                 break;
1477
1478         case DECLARATION_KIND_LOCAL_VARIABLE: {
1479                 ir_mode *const mode  = get_ir_mode_storage(type);
1480                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1481                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1482         }
1483         case DECLARATION_KIND_PARAMETER: {
1484                 ir_mode *const mode  = get_ir_mode_storage(type);
1485                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1486                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1487         }
1488         case DECLARATION_KIND_FUNCTION: {
1489                 ir_mode *const mode = get_ir_mode_storage(type);
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 *cast_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         const expression_t *value      = expression->value;
2407         ir_node            *value_node = expression_to_firm(value);
2408
2409         if (!is_type_scalar(type)) {
2410                 /* make sure firm type is constructed */
2411                 (void) get_ir_type(type);
2412                 return value_node;
2413         }
2414
2415         type_t  *from_type = skip_typeref(value->base.type);
2416         ir_mode *mode      = get_ir_mode_storage(type);
2417         /* check for conversion from / to __based types */
2418         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2419                 const variable_t *from_var = from_type->pointer.base_variable;
2420                 const variable_t *to_var   = type->pointer.base_variable;
2421                 if (from_var != to_var) {
2422                         if (from_var != NULL) {
2423                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2424                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2425                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2426                         }
2427                         if (to_var != NULL) {
2428                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2429                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2430                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2431                         }
2432                 }
2433         }
2434
2435         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2436         ir_node *node       = create_conv(dbgi, value_node, mode);
2437         node                = do_strict_conv(dbgi, node);
2438         node                = create_conv(dbgi, node, mode_arith);
2439
2440         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2441                 /* bool adjustments (have to compare to get 0/1 value */
2442                 ir_node *zero = new_Const(get_mode_null(mode_arith));
2443                 ir_node *cmp  = new_d_Cmp(dbgi, node, zero);
2444                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
2445                 ir_node *one  = new_Const_long(mode_arith, 1);
2446                 node          = new_d_Mux(dbgi, proj, zero, one, mode_arith);
2447         }
2448
2449         return node;
2450 }
2451
2452 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2453 {
2454         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2455         type_t   *type = skip_typeref(expression->base.type);
2456
2457         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2458                 return expression_to_addr(expression->value);
2459
2460         const expression_t *value = expression->value;
2461
2462         switch(expression->base.kind) {
2463         case EXPR_UNARY_NEGATE: {
2464                 ir_node *value_node = expression_to_firm(value);
2465                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2466                 return new_d_Minus(dbgi, value_node, mode);
2467         }
2468         case EXPR_UNARY_PLUS:
2469                 return expression_to_firm(value);
2470         case EXPR_UNARY_BITWISE_NEGATE: {
2471                 ir_node *value_node = expression_to_firm(value);
2472                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2473                 return new_d_Not(dbgi, value_node, mode);
2474         }
2475         case EXPR_UNARY_NOT: {
2476                 ir_node *value_node = _expression_to_firm(value);
2477                 value_node          = create_conv(dbgi, value_node, mode_b);
2478                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2479                 return res;
2480         }
2481         case EXPR_UNARY_DEREFERENCE: {
2482                 ir_node *value_node = expression_to_firm(value);
2483                 type_t  *value_type = skip_typeref(value->base.type);
2484                 assert(is_type_pointer(value_type));
2485
2486                 /* check for __based */
2487                 const variable_t *const base_var = value_type->pointer.base_variable;
2488                 if (base_var != NULL) {
2489                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2490                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2491                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2492                 }
2493                 type_t  *points_to  = value_type->pointer.points_to;
2494                 return deref_address(dbgi, points_to, value_node);
2495         }
2496         case EXPR_UNARY_POSTFIX_INCREMENT:
2497         case EXPR_UNARY_POSTFIX_DECREMENT:
2498         case EXPR_UNARY_PREFIX_INCREMENT:
2499         case EXPR_UNARY_PREFIX_DECREMENT:
2500                 return create_incdec(expression);
2501         case EXPR_UNARY_CAST_IMPLICIT:
2502         case EXPR_UNARY_CAST:
2503                 return cast_to_firm(expression);
2504         case EXPR_UNARY_ASSUME:
2505                 if (firm_opt.confirm)
2506                         return handle_assume(dbgi, value);
2507                 else
2508                         return NULL;
2509
2510         default:
2511                 break;
2512         }
2513         panic("invalid UNEXPR type found");
2514 }
2515
2516 /**
2517  * produces a 0/1 depending of the value of a mode_b node
2518  */
2519 static ir_node *produce_condition_result(const expression_t *expression,
2520                                          ir_mode *mode, dbg_info *dbgi)
2521 {
2522         ir_node *cur_block = get_cur_block();
2523
2524         ir_node *one_block = new_immBlock();
2525         set_cur_block(one_block);
2526         ir_node *one       = new_Const(get_mode_one(mode));
2527         ir_node *jmp_one   = new_d_Jmp(dbgi);
2528
2529         ir_node *zero_block = new_immBlock();
2530         set_cur_block(zero_block);
2531         ir_node *zero       = new_Const(get_mode_null(mode));
2532         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2533
2534         set_cur_block(cur_block);
2535         create_condition_evaluation(expression, one_block, zero_block);
2536         mature_immBlock(one_block);
2537         mature_immBlock(zero_block);
2538
2539         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2540         new_Block(2, in_cf);
2541
2542         ir_node *in[2] = { one, zero };
2543         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2544
2545         return val;
2546 }
2547
2548 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2549                 ir_node *value, type_t *type)
2550 {
2551         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2552         assert(is_type_pointer(type));
2553         pointer_type_t *const pointer_type = &type->pointer;
2554         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2555         ir_node        *      elem_size    = get_type_size_node(points_to);
2556         elem_size                          = create_conv(dbgi, elem_size, mode);
2557         value                              = create_conv(dbgi, value,     mode);
2558         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2559         return mul;
2560 }
2561
2562 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2563                           ir_node *left, ir_node *right)
2564 {
2565         ir_mode  *mode;
2566         type_t   *type_left  = skip_typeref(expression->left->base.type);
2567         type_t   *type_right = skip_typeref(expression->right->base.type);
2568
2569         expression_kind_t kind = expression->base.kind;
2570
2571         switch (kind) {
2572         case EXPR_BINARY_SHIFTLEFT:
2573         case EXPR_BINARY_SHIFTRIGHT:
2574         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2575         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2576                 mode  = get_irn_mode(left);
2577                 right = create_conv(dbgi, right, mode_uint);
2578                 break;
2579
2580         case EXPR_BINARY_SUB:
2581                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2582                         const pointer_type_t *const ptr_type = &type_left->pointer;
2583
2584                         mode = get_ir_mode_arithmetic(expression->base.type);
2585                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2586                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2587                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2588                         ir_node *const no_mem    = new_NoMem();
2589                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2590                                                                                                    mode, op_pin_state_floats);
2591                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2592                 }
2593                 /* fallthrough */
2594         case EXPR_BINARY_SUB_ASSIGN:
2595                 if (is_type_pointer(type_left)) {
2596                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2597                         mode  = get_ir_mode_arithmetic(type_left);
2598                         break;
2599                 }
2600                 goto normal_node;
2601
2602         case EXPR_BINARY_ADD:
2603         case EXPR_BINARY_ADD_ASSIGN:
2604                 if (is_type_pointer(type_left)) {
2605                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2606                         mode  = get_ir_mode_arithmetic(type_left);
2607                         break;
2608                 } else if (is_type_pointer(type_right)) {
2609                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2610                         mode  = get_ir_mode_arithmetic(type_right);
2611                         break;
2612                 }
2613                 goto normal_node;
2614
2615         default:
2616 normal_node:
2617                 mode = get_ir_mode_arithmetic(type_right);
2618                 left = create_conv(dbgi, left, mode);
2619                 break;
2620         }
2621
2622         switch (kind) {
2623         case EXPR_BINARY_ADD_ASSIGN:
2624         case EXPR_BINARY_ADD:
2625                 return new_d_Add(dbgi, left, right, mode);
2626         case EXPR_BINARY_SUB_ASSIGN:
2627         case EXPR_BINARY_SUB:
2628                 return new_d_Sub(dbgi, left, right, mode);
2629         case EXPR_BINARY_MUL_ASSIGN:
2630         case EXPR_BINARY_MUL:
2631                 return new_d_Mul(dbgi, left, right, mode);
2632         case EXPR_BINARY_BITWISE_AND:
2633         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2634                 return new_d_And(dbgi, left, right, mode);
2635         case EXPR_BINARY_BITWISE_OR:
2636         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2637                 return new_d_Or(dbgi, left, right, mode);
2638         case EXPR_BINARY_BITWISE_XOR:
2639         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2640                 return new_d_Eor(dbgi, left, right, mode);
2641         case EXPR_BINARY_SHIFTLEFT:
2642         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2643                 return new_d_Shl(dbgi, left, right, mode);
2644         case EXPR_BINARY_SHIFTRIGHT:
2645         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2646                 if (mode_is_signed(mode)) {
2647                         return new_d_Shrs(dbgi, left, right, mode);
2648                 } else {
2649                         return new_d_Shr(dbgi, left, right, mode);
2650                 }
2651         case EXPR_BINARY_DIV:
2652         case EXPR_BINARY_DIV_ASSIGN: {
2653                 ir_node *pin = new_Pin(new_NoMem());
2654                 ir_node *op;
2655                 ir_node *res;
2656                 if (mode_is_float(mode)) {
2657                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2658                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2659                 } else {
2660                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2661                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2662                 }
2663                 return res;
2664         }
2665         case EXPR_BINARY_MOD:
2666         case EXPR_BINARY_MOD_ASSIGN: {
2667                 ir_node *pin = new_Pin(new_NoMem());
2668                 assert(!mode_is_float(mode));
2669                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2670                                          op_pin_state_floats);
2671                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2672                 return res;
2673         }
2674         default:
2675                 panic("unexpected expression kind");
2676         }
2677 }
2678
2679 static ir_node *create_lazy_op(const binary_expression_t *expression)
2680 {
2681         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2682         type_t   *type = skip_typeref(expression->base.type);
2683         ir_mode  *mode = get_ir_mode_arithmetic(type);
2684
2685         if (is_constant_expression(expression->left)) {
2686                 bool val = fold_constant_to_bool(expression->left);
2687                 expression_kind_t ekind = expression->base.kind;
2688                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2689                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2690                         if (!val) {
2691                                 return new_Const(get_mode_null(mode));
2692                         }
2693                 } else {
2694                         if (val) {
2695                                 return new_Const(get_mode_one(mode));
2696                         }
2697                 }
2698
2699                 if (is_constant_expression(expression->right)) {
2700                         bool valr = fold_constant_to_bool(expression->right);
2701                         return valr ?
2702                                 new_Const(get_mode_one(mode)) :
2703                                 new_Const(get_mode_null(mode));
2704                 }
2705
2706                 return produce_condition_result(expression->right, mode, dbgi);
2707         }
2708
2709         return produce_condition_result((const expression_t*) expression, mode,
2710                                         dbgi);
2711 }
2712
2713 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2714                                             ir_node *right, ir_mode *mode);
2715
2716 static ir_node *create_assign_binop(const binary_expression_t *expression)
2717 {
2718         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2719         const expression_t *left_expr = expression->left;
2720         type_t             *type      = skip_typeref(left_expr->base.type);
2721         ir_mode            *left_mode = get_ir_mode_storage(type);
2722         ir_node            *right     = expression_to_firm(expression->right);
2723         ir_node            *left_addr = expression_to_addr(left_expr);
2724         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2725         ir_node            *result    = create_op(dbgi, expression, left, right);
2726
2727         result = create_conv(dbgi, result, left_mode);
2728         result = do_strict_conv(dbgi, result);
2729
2730         result = set_value_for_expression_addr(left_expr, result, left_addr);
2731
2732         if (!is_type_compound(type)) {
2733                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2734                 result = create_conv(dbgi, result, mode_arithmetic);
2735         }
2736         return result;
2737 }
2738
2739 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2740 {
2741         expression_kind_t kind = expression->base.kind;
2742
2743         switch(kind) {
2744         case EXPR_BINARY_EQUAL:
2745         case EXPR_BINARY_NOTEQUAL:
2746         case EXPR_BINARY_LESS:
2747         case EXPR_BINARY_LESSEQUAL:
2748         case EXPR_BINARY_GREATER:
2749         case EXPR_BINARY_GREATEREQUAL:
2750         case EXPR_BINARY_ISGREATER:
2751         case EXPR_BINARY_ISGREATEREQUAL:
2752         case EXPR_BINARY_ISLESS:
2753         case EXPR_BINARY_ISLESSEQUAL:
2754         case EXPR_BINARY_ISLESSGREATER:
2755         case EXPR_BINARY_ISUNORDERED: {
2756                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2757                 ir_node *left  = expression_to_firm(expression->left);
2758                 ir_node *right = expression_to_firm(expression->right);
2759                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2760                 long     pnc   = get_pnc(kind, expression->left->base.type);
2761                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2762                 return proj;
2763         }
2764         case EXPR_BINARY_ASSIGN: {
2765                 ir_node *addr  = expression_to_addr(expression->left);
2766                 ir_node *right = expression_to_firm(expression->right);
2767                 ir_node *res
2768                         = set_value_for_expression_addr(expression->left, right, addr);
2769
2770                 type_t  *type            = skip_typeref(expression->base.type);
2771                 if (!is_type_compound(type)) {
2772                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2773                         res                      = create_conv(NULL, res, mode_arithmetic);
2774                 }
2775                 return res;
2776         }
2777         case EXPR_BINARY_ADD:
2778         case EXPR_BINARY_SUB:
2779         case EXPR_BINARY_MUL:
2780         case EXPR_BINARY_DIV:
2781         case EXPR_BINARY_MOD:
2782         case EXPR_BINARY_BITWISE_AND:
2783         case EXPR_BINARY_BITWISE_OR:
2784         case EXPR_BINARY_BITWISE_XOR:
2785         case EXPR_BINARY_SHIFTLEFT:
2786         case EXPR_BINARY_SHIFTRIGHT:
2787         {
2788                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2789                 ir_node  *left  = expression_to_firm(expression->left);
2790                 ir_node  *right = expression_to_firm(expression->right);
2791                 return create_op(dbgi, expression, left, right);
2792         }
2793         case EXPR_BINARY_LOGICAL_AND:
2794         case EXPR_BINARY_LOGICAL_OR:
2795                 return create_lazy_op(expression);
2796         case EXPR_BINARY_COMMA:
2797                 /* create side effects of left side */
2798                 (void) expression_to_firm(expression->left);
2799                 return _expression_to_firm(expression->right);
2800
2801         case EXPR_BINARY_ADD_ASSIGN:
2802         case EXPR_BINARY_SUB_ASSIGN:
2803         case EXPR_BINARY_MUL_ASSIGN:
2804         case EXPR_BINARY_MOD_ASSIGN:
2805         case EXPR_BINARY_DIV_ASSIGN:
2806         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2807         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2808         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2809         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2810         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2811                 return create_assign_binop(expression);
2812         default:
2813                 panic("TODO binexpr type");
2814         }
2815 }
2816
2817 static ir_node *array_access_addr(const array_access_expression_t *expression)
2818 {
2819         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2820         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2821         ir_node  *offset      = expression_to_firm(expression->index);
2822         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2823         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2824         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2825
2826         return result;
2827 }
2828
2829 static ir_node *array_access_to_firm(
2830                 const array_access_expression_t *expression)
2831 {
2832         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2833         ir_node  *addr   = array_access_addr(expression);
2834         type_t   *type   = revert_automatic_type_conversion(
2835                         (const expression_t*) expression);
2836         type             = skip_typeref(type);
2837
2838         return deref_address(dbgi, type, addr);
2839 }
2840
2841 static long get_offsetof_offset(const offsetof_expression_t *expression)
2842 {
2843         type_t *orig_type = expression->type;
2844         long    offset    = 0;
2845
2846         designator_t *designator = expression->designator;
2847         for ( ; designator != NULL; designator = designator->next) {
2848                 type_t *type = skip_typeref(orig_type);
2849                 /* be sure the type is constructed */
2850                 (void) get_ir_type(type);
2851
2852                 if (designator->symbol != NULL) {
2853                         assert(is_type_compound(type));
2854                         symbol_t *symbol = designator->symbol;
2855
2856                         compound_t *compound = type->compound.compound;
2857                         entity_t   *iter     = compound->members.entities;
2858                         for ( ; iter != NULL; iter = iter->base.next) {
2859                                 if (iter->base.symbol == symbol) {
2860                                         break;
2861                                 }
2862                         }
2863                         assert(iter != NULL);
2864
2865                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2866                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2867                         offset += get_entity_offset(iter->compound_member.entity);
2868
2869                         orig_type = iter->declaration.type;
2870                 } else {
2871                         expression_t *array_index = designator->array_index;
2872                         assert(designator->array_index != NULL);
2873                         assert(is_type_array(type));
2874
2875                         long index         = fold_constant_to_int(array_index);
2876                         ir_type *arr_type  = get_ir_type(type);
2877                         ir_type *elem_type = get_array_element_type(arr_type);
2878                         long     elem_size = get_type_size_bytes(elem_type);
2879
2880                         offset += index * elem_size;
2881
2882                         orig_type = type->array.element_type;
2883                 }
2884         }
2885
2886         return offset;
2887 }
2888
2889 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2890 {
2891         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2892         long      offset = get_offsetof_offset(expression);
2893         tarval   *tv     = new_tarval_from_long(offset, mode);
2894         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2895
2896         return new_d_Const(dbgi, tv);
2897 }
2898
2899 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2900                                      ir_entity *entity, type_t *type);
2901
2902 static ir_node *compound_literal_to_firm(
2903                 const compound_literal_expression_t *expression)
2904 {
2905         type_t *type = expression->type;
2906
2907         /* create an entity on the stack */
2908         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2909
2910         ident     *const id     = id_unique("CompLit.%u");
2911         ir_type   *const irtype = get_ir_type(type);
2912         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2913         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2914         set_entity_ld_ident(entity, id);
2915
2916         set_entity_variability(entity, variability_uninitialized);
2917
2918         /* create initialisation code */
2919         initializer_t *initializer = expression->initializer;
2920         create_local_initializer(initializer, dbgi, entity, type);
2921
2922         /* create a sel for the compound literal address */
2923         ir_node *frame = get_irg_frame(current_ir_graph);
2924         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2925         return sel;
2926 }
2927
2928 /**
2929  * Transform a sizeof expression into Firm code.
2930  */
2931 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2932 {
2933         type_t *const type = skip_typeref(expression->type);
2934         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2935         if (is_type_array(type) && type->array.is_vla
2936                         && expression->tp_expression != NULL) {
2937                 expression_to_firm(expression->tp_expression);
2938         }
2939
2940         return get_type_size_node(type);
2941 }
2942
2943 static entity_t *get_expression_entity(const expression_t *expression)
2944 {
2945         if (expression->kind != EXPR_REFERENCE)
2946                 return NULL;
2947
2948         return expression->reference.entity;
2949 }
2950
2951 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2952 {
2953         switch(entity->kind) {
2954         DECLARATION_KIND_CASES
2955                 return entity->declaration.alignment;
2956         case ENTITY_STRUCT:
2957         case ENTITY_UNION:
2958                 return entity->compound.alignment;
2959         case ENTITY_TYPEDEF:
2960                 return entity->typedefe.alignment;
2961         default:
2962                 break;
2963         }
2964         return 0;
2965 }
2966
2967 /**
2968  * Transform an alignof expression into Firm code.
2969  */
2970 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2971 {
2972         unsigned alignment = 0;
2973
2974         const expression_t *tp_expression = expression->tp_expression;
2975         if (tp_expression != NULL) {
2976                 entity_t *entity = get_expression_entity(tp_expression);
2977                 if (entity != NULL) {
2978                         alignment = get_cparser_entity_alignment(entity);
2979                 }
2980         }
2981
2982         if (alignment == 0) {
2983                 type_t *type = expression->type;
2984                 alignment = get_type_alignment(type);
2985         }
2986
2987         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2988         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
2989         tarval   *tv   = new_tarval_from_long(alignment, mode);
2990         return new_d_Const(dbgi, tv);
2991 }
2992
2993 static void init_ir_types(void);
2994
2995 static tarval *fold_constant_to_tarval(const expression_t *expression)
2996 {
2997         assert(is_type_valid(skip_typeref(expression->base.type)));
2998
2999         bool constant_folding_old = constant_folding;
3000         constant_folding = true;
3001
3002         init_ir_types();
3003
3004         assert(is_constant_expression(expression));
3005
3006         ir_graph *old_current_ir_graph = current_ir_graph;
3007         current_ir_graph = get_const_code_irg();
3008
3009         ir_node *cnst = expression_to_firm(expression);
3010         current_ir_graph = old_current_ir_graph;
3011
3012         if (!is_Const(cnst)) {
3013                 panic("couldn't fold constant");
3014         }
3015
3016         constant_folding = constant_folding_old;
3017
3018         tarval *tv = get_Const_tarval(cnst);
3019         return tv;
3020 }
3021
3022 long fold_constant_to_int(const expression_t *expression)
3023 {
3024         if (expression->kind == EXPR_INVALID)
3025                 return 0;
3026
3027         tarval *tv = fold_constant_to_tarval(expression);
3028         if (!tarval_is_long(tv)) {
3029                 panic("result of constant folding is not integer");
3030         }
3031
3032         return get_tarval_long(tv);
3033 }
3034
3035 bool fold_constant_to_bool(const expression_t *expression)
3036 {
3037         if (expression->kind == EXPR_INVALID)
3038                 return false;
3039         tarval *tv = fold_constant_to_tarval(expression);
3040         return !tarval_is_null(tv);
3041 }
3042
3043 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3044 {
3045         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3046
3047         /* first try to fold a constant condition */
3048         if (is_constant_expression(expression->condition)) {
3049                 bool val = fold_constant_to_bool(expression->condition);
3050                 if (val) {
3051                         expression_t *true_expression = expression->true_expression;
3052                         if (true_expression == NULL)
3053                                 true_expression = expression->condition;
3054                         return expression_to_firm(true_expression);
3055                 } else {
3056                         return expression_to_firm(expression->false_expression);
3057                 }
3058         }
3059
3060         ir_node *cur_block   = get_cur_block();
3061
3062         /* create the true block */
3063         ir_node *true_block  = new_immBlock();
3064         set_cur_block(true_block);
3065
3066         ir_node *true_val = expression->true_expression != NULL ?
3067                 expression_to_firm(expression->true_expression) : NULL;
3068         ir_node *true_jmp = new_Jmp();
3069
3070         /* create the false block */
3071         ir_node *false_block = new_immBlock();
3072         set_cur_block(false_block);
3073
3074         ir_node *false_val = expression_to_firm(expression->false_expression);
3075         ir_node *false_jmp = new_Jmp();
3076
3077         /* create the condition evaluation */
3078         set_cur_block(cur_block);
3079         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3080         if (expression->true_expression == NULL) {
3081                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3082                         true_val = cond_expr;
3083                 } else {
3084                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3085                          * comparison.  Generate a "1" as value for the true branch. */
3086                         true_val = new_Const(get_mode_one(mode_Is));
3087                 }
3088         }
3089         mature_immBlock(true_block);
3090         mature_immBlock(false_block);
3091
3092         /* create the common block */
3093         ir_node *in_cf[2] = { true_jmp, false_jmp };
3094         new_Block(2, in_cf);
3095
3096         /* TODO improve static semantics, so either both or no values are NULL */
3097         if (true_val == NULL || false_val == NULL)
3098                 return NULL;
3099
3100         ir_node *in[2] = { true_val, false_val };
3101         ir_mode *mode  = get_irn_mode(true_val);
3102         assert(get_irn_mode(false_val) == mode);
3103         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3104
3105         return val;
3106 }
3107
3108 /**
3109  * Returns an IR-node representing the address of a field.
3110  */
3111 static ir_node *select_addr(const select_expression_t *expression)
3112 {
3113         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3114
3115         construct_select_compound(expression);
3116
3117         ir_node *compound_addr = expression_to_firm(expression->compound);
3118
3119         entity_t *entry = expression->compound_entry;
3120         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3121         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3122
3123         if (constant_folding) {
3124                 ir_mode *mode = get_irn_mode(compound_addr);
3125                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3126                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3127                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3128         } else {
3129                 ir_entity *irentity = entry->compound_member.entity;
3130                 assert(irentity != NULL);
3131                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3132         }
3133 }
3134
3135 static ir_node *select_to_firm(const select_expression_t *expression)
3136 {
3137         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3138         ir_node  *addr = select_addr(expression);
3139         type_t   *type = revert_automatic_type_conversion(
3140                         (const expression_t*) expression);
3141         type           = skip_typeref(type);
3142
3143         entity_t *entry      = expression->compound_entry;
3144         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3145         type_t   *entry_type = skip_typeref(entry->declaration.type);
3146
3147         if (entry_type->kind == TYPE_BITFIELD) {
3148                 return bitfield_extract_to_firm(expression, addr);
3149         }
3150
3151         return deref_address(dbgi, type, addr);
3152 }
3153
3154 /* Values returned by __builtin_classify_type. */
3155 typedef enum gcc_type_class
3156 {
3157         no_type_class = -1,
3158         void_type_class,
3159         integer_type_class,
3160         char_type_class,
3161         enumeral_type_class,
3162         boolean_type_class,
3163         pointer_type_class,
3164         reference_type_class,
3165         offset_type_class,
3166         real_type_class,
3167         complex_type_class,
3168         function_type_class,
3169         method_type_class,
3170         record_type_class,
3171         union_type_class,
3172         array_type_class,
3173         string_type_class,
3174         set_type_class,
3175         file_type_class,
3176         lang_type_class
3177 } gcc_type_class;
3178
3179 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3180 {
3181         type_t *type = expr->type_expression->base.type;
3182
3183         /* FIXME gcc returns different values depending on whether compiling C or C++
3184          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3185         gcc_type_class tc;
3186         for (;;) {
3187                 type = skip_typeref(type);
3188                 switch (type->kind) {
3189                         case TYPE_ATOMIC: {
3190                                 const atomic_type_t *const atomic_type = &type->atomic;
3191                                 switch (atomic_type->akind) {
3192                                         /* should not be reached */
3193                                         case ATOMIC_TYPE_INVALID:
3194                                                 tc = no_type_class;
3195                                                 goto make_const;
3196
3197                                         /* gcc cannot do that */
3198                                         case ATOMIC_TYPE_VOID:
3199                                                 tc = void_type_class;
3200                                                 goto make_const;
3201
3202                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3203                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3204                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3205                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3206                                         case ATOMIC_TYPE_SHORT:
3207                                         case ATOMIC_TYPE_USHORT:
3208                                         case ATOMIC_TYPE_INT:
3209                                         case ATOMIC_TYPE_UINT:
3210                                         case ATOMIC_TYPE_LONG:
3211                                         case ATOMIC_TYPE_ULONG:
3212                                         case ATOMIC_TYPE_LONGLONG:
3213                                         case ATOMIC_TYPE_ULONGLONG:
3214                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3215                                                 tc = integer_type_class;
3216                                                 goto make_const;
3217
3218                                         case ATOMIC_TYPE_FLOAT:
3219                                         case ATOMIC_TYPE_DOUBLE:
3220                                         case ATOMIC_TYPE_LONG_DOUBLE:
3221                                                 tc = real_type_class;
3222                                                 goto make_const;
3223                                 }
3224                                 panic("Unexpected atomic type in classify_type_to_firm().");
3225                         }
3226
3227                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3228                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3229                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3230                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3231                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3232                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3233                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3234                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3235
3236                         /* gcc handles this as integer */
3237                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3238
3239                         /* gcc classifies the referenced type */
3240                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3241
3242                         case TYPE_BUILTIN:
3243                         /* typedef/typeof should be skipped already */
3244                         case TYPE_TYPEDEF:
3245                         case TYPE_TYPEOF:
3246                         case TYPE_INVALID:
3247                         case TYPE_ERROR:
3248                                 break;
3249                 }
3250                 panic("unexpected TYPE classify_type_to_firm().");
3251         }
3252
3253 make_const:;
3254         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3255         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3256         return new_d_Const(dbgi, tv);
3257 }
3258
3259 static ir_node *function_name_to_firm(
3260                 const funcname_expression_t *const expr)
3261 {
3262         switch(expr->kind) {
3263         case FUNCNAME_FUNCTION:
3264         case FUNCNAME_PRETTY_FUNCTION:
3265         case FUNCNAME_FUNCDNAME:
3266                 if (current_function_name == NULL) {
3267                         const source_position_t *const src_pos = &expr->base.source_position;
3268                         const char    *name  = current_function_entity->base.symbol->string;
3269                         const string_t string = { name, strlen(name) + 1 };
3270                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3271                 }
3272                 return current_function_name;
3273         case FUNCNAME_FUNCSIG:
3274                 if (current_funcsig == NULL) {
3275                         const source_position_t *const src_pos = &expr->base.source_position;
3276                         ir_entity *ent = get_irg_entity(current_ir_graph);
3277                         const char *const name = get_entity_ld_name(ent);
3278                         const string_t string = { name, strlen(name) + 1 };
3279                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3280                 }
3281                 return current_funcsig;
3282         }
3283         panic("Unsupported function name");
3284 }
3285
3286 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3287 {
3288         statement_t *statement = expr->statement;
3289
3290         assert(statement->kind == STATEMENT_COMPOUND);
3291         return compound_statement_to_firm(&statement->compound);
3292 }
3293
3294 static ir_node *va_start_expression_to_firm(
3295         const va_start_expression_t *const expr)
3296 {
3297         type_t    *const type        = current_function_entity->declaration.type;
3298         ir_type   *const method_type = get_ir_type(type);
3299         int        const n           = get_method_n_params(method_type) - 1;
3300         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3301         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3302         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3303         ir_node   *const no_mem      = new_NoMem();
3304         ir_node   *const arg_sel     =
3305                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3306
3307         type_t    *const param_type  = expr->parameter->base.type;
3308         ir_node   *const cnst        = get_type_size_node(param_type);
3309         ir_mode   *const mode        = get_irn_mode(cnst);
3310         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3311         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3312         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3313         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3314         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3315         set_value_for_expression(expr->ap, add);
3316
3317         return NULL;
3318 }
3319
3320 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3321 {
3322         type_t       *const type    = expr->base.type;
3323         expression_t *const ap_expr = expr->ap;
3324         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3325         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3326         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3327         ir_node      *const res     = deref_address(dbgi, type, ap);
3328
3329         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3330         ir_mode      *const mode    = get_irn_mode(cnst);
3331         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3332         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3333         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3334         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3335         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3336
3337         set_value_for_expression_addr(ap_expr, add, ap_addr);
3338
3339         return res;
3340 }
3341
3342 /**
3343  * Generate Firm for a va_copy expression.
3344  */
3345 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3346 {
3347         ir_node *const src = expression_to_firm(expr->src);
3348         set_value_for_expression(expr->dst, src);
3349         return NULL;
3350 }
3351
3352 static ir_node *dereference_addr(const unary_expression_t *const expression)
3353 {
3354         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3355         return expression_to_firm(expression->value);
3356 }
3357
3358 /**
3359  * Returns a IR-node representing an lvalue of the given expression.
3360  */
3361 static ir_node *expression_to_addr(const expression_t *expression)
3362 {
3363         switch(expression->kind) {
3364         case EXPR_ARRAY_ACCESS:
3365                 return array_access_addr(&expression->array_access);
3366         case EXPR_CALL:
3367                 return call_expression_to_firm(&expression->call);
3368         case EXPR_COMPOUND_LITERAL:
3369                 return compound_literal_to_firm(&expression->compound_literal);
3370         case EXPR_REFERENCE:
3371                 return reference_addr(&expression->reference);
3372         case EXPR_SELECT:
3373                 return select_addr(&expression->select);
3374         case EXPR_UNARY_DEREFERENCE:
3375                 return dereference_addr(&expression->unary);
3376         default:
3377                 break;
3378         }
3379         panic("trying to get address of non-lvalue");
3380 }
3381
3382 static ir_node *builtin_constant_to_firm(
3383                 const builtin_constant_expression_t *expression)
3384 {
3385         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3386         long     v;
3387
3388         if (is_constant_expression(expression->value)) {
3389                 v = 1;
3390         } else {
3391                 v = 0;
3392         }
3393         return new_Const_long(mode, v);
3394 }
3395
3396 static ir_node *builtin_types_compatible_to_firm(
3397                 const builtin_types_compatible_expression_t *expression)
3398 {
3399         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3400         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3401         long     const value = types_compatible(left, right) ? 1 : 0;
3402         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3403         return new_Const_long(mode, value);
3404 }
3405
3406 static ir_node *get_label_block(label_t *label)
3407 {
3408         if (label->block != NULL)
3409                 return label->block;
3410
3411         /* beware: might be called from create initializer with current_ir_graph
3412          * set to const_code_irg. */
3413         ir_graph *rem    = current_ir_graph;
3414         current_ir_graph = current_function;
3415
3416         ir_node *block = new_immBlock();
3417
3418         label->block = block;
3419
3420         ARR_APP1(label_t *, all_labels, label);
3421
3422         current_ir_graph = rem;
3423         return block;
3424 }
3425
3426 /**
3427  * Pointer to a label.  This is used for the
3428  * GNU address-of-label extension.
3429  */
3430 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3431 {
3432         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3433         ir_node   *block  = get_label_block(label->label);
3434         ir_entity *entity = create_Block_entity(block);
3435
3436         symconst_symbol value;
3437         value.entity_p = entity;
3438         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3439 }
3440
3441 /**
3442  * creates firm nodes for an expression. The difference between this function
3443  * and expression_to_firm is, that this version might produce mode_b nodes
3444  * instead of mode_Is.
3445  */
3446 static ir_node *_expression_to_firm(const expression_t *expression)
3447 {
3448 #ifndef NDEBUG
3449         if (!constant_folding) {
3450                 assert(!expression->base.transformed);
3451                 ((expression_t*) expression)->base.transformed = true;
3452         }
3453 #endif
3454
3455         switch (expression->kind) {
3456         case EXPR_CHARACTER_CONSTANT:
3457                 return character_constant_to_firm(&expression->conste);
3458         case EXPR_WIDE_CHARACTER_CONSTANT:
3459                 return wide_character_constant_to_firm(&expression->conste);
3460         case EXPR_CONST:
3461                 return const_to_firm(&expression->conste);
3462         case EXPR_STRING_LITERAL:
3463                 return string_literal_to_firm(&expression->string);
3464         case EXPR_WIDE_STRING_LITERAL:
3465                 return wide_string_literal_to_firm(&expression->wide_string);
3466         case EXPR_REFERENCE:
3467                 return reference_expression_to_firm(&expression->reference);
3468         case EXPR_REFERENCE_ENUM_VALUE:
3469                 return reference_expression_enum_value_to_firm(&expression->reference);
3470         case EXPR_CALL:
3471                 return call_expression_to_firm(&expression->call);
3472         EXPR_UNARY_CASES
3473                 return unary_expression_to_firm(&expression->unary);
3474         EXPR_BINARY_CASES
3475                 return binary_expression_to_firm(&expression->binary);
3476         case EXPR_ARRAY_ACCESS:
3477                 return array_access_to_firm(&expression->array_access);
3478         case EXPR_SIZEOF:
3479                 return sizeof_to_firm(&expression->typeprop);
3480         case EXPR_ALIGNOF:
3481                 return alignof_to_firm(&expression->typeprop);
3482         case EXPR_CONDITIONAL:
3483                 return conditional_to_firm(&expression->conditional);
3484         case EXPR_SELECT:
3485                 return select_to_firm(&expression->select);
3486         case EXPR_CLASSIFY_TYPE:
3487                 return classify_type_to_firm(&expression->classify_type);
3488         case EXPR_FUNCNAME:
3489                 return function_name_to_firm(&expression->funcname);
3490         case EXPR_STATEMENT:
3491                 return statement_expression_to_firm(&expression->statement);
3492         case EXPR_VA_START:
3493                 return va_start_expression_to_firm(&expression->va_starte);
3494         case EXPR_VA_ARG:
3495                 return va_arg_expression_to_firm(&expression->va_arge);
3496         case EXPR_VA_COPY:
3497                 return va_copy_expression_to_firm(&expression->va_copye);
3498         case EXPR_BUILTIN_CONSTANT_P:
3499                 return builtin_constant_to_firm(&expression->builtin_constant);
3500         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3501                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3502         case EXPR_OFFSETOF:
3503                 return offsetof_to_firm(&expression->offsetofe);
3504         case EXPR_COMPOUND_LITERAL:
3505                 return compound_literal_to_firm(&expression->compound_literal);
3506         case EXPR_LABEL_ADDRESS:
3507                 return label_address_to_firm(&expression->label_address);
3508
3509         case EXPR_UNKNOWN:
3510         case EXPR_INVALID:
3511                 break;
3512         }
3513         panic("invalid expression found");
3514 }
3515
3516 /**
3517  * Check if a given expression is a GNU __builtin_expect() call.
3518  */
3519 static bool is_builtin_expect(const expression_t *expression)
3520 {
3521         if (expression->kind != EXPR_CALL)
3522                 return false;
3523
3524         expression_t *function = expression->call.function;
3525         if (function->kind != EXPR_REFERENCE)
3526                 return false;
3527         reference_expression_t *ref = &function->reference;
3528         if (ref->entity->kind         != ENTITY_FUNCTION ||
3529             ref->entity->function.btk != bk_gnu_builtin_expect)
3530                 return false;
3531
3532         return true;
3533 }
3534
3535 static bool produces_mode_b(const expression_t *expression)
3536 {
3537         switch (expression->kind) {
3538         case EXPR_BINARY_EQUAL:
3539         case EXPR_BINARY_NOTEQUAL:
3540         case EXPR_BINARY_LESS:
3541         case EXPR_BINARY_LESSEQUAL:
3542         case EXPR_BINARY_GREATER:
3543         case EXPR_BINARY_GREATEREQUAL:
3544         case EXPR_BINARY_ISGREATER:
3545         case EXPR_BINARY_ISGREATEREQUAL:
3546         case EXPR_BINARY_ISLESS:
3547         case EXPR_BINARY_ISLESSEQUAL:
3548         case EXPR_BINARY_ISLESSGREATER:
3549         case EXPR_BINARY_ISUNORDERED:
3550         case EXPR_UNARY_NOT:
3551                 return true;
3552
3553         case EXPR_CALL:
3554                 if (is_builtin_expect(expression)) {
3555                         expression_t *argument = expression->call.arguments->expression;
3556                         return produces_mode_b(argument);
3557                 }
3558                 return false;
3559         case EXPR_BINARY_COMMA:
3560                 return produces_mode_b(expression->binary.right);
3561
3562         default:
3563                 return false;
3564         }
3565 }
3566
3567 static ir_node *expression_to_firm(const expression_t *expression)
3568 {
3569         if (!produces_mode_b(expression)) {
3570                 ir_node *res = _expression_to_firm(expression);
3571                 assert(res == NULL || get_irn_mode(res) != mode_b);
3572                 return res;
3573         }
3574
3575         if (is_constant_expression(expression)) {
3576                 ir_node *res  = _expression_to_firm(expression);
3577                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3578                 assert(is_Const(res));
3579                 if (is_Const_null(res)) {
3580                         return new_Const_long(mode, 0);
3581                 } else {
3582                         return new_Const_long(mode, 1);
3583                 }
3584         }
3585
3586         /* we have to produce a 0/1 from the mode_b expression */
3587         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3588         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3589         return produce_condition_result(expression, mode, dbgi);
3590 }
3591
3592 /**
3593  * create a short-circuit expression evaluation that tries to construct
3594  * efficient control flow structures for &&, || and ! expressions
3595  */
3596 static ir_node *create_condition_evaluation(const expression_t *expression,
3597                                             ir_node *true_block,
3598                                             ir_node *false_block)
3599 {
3600         switch(expression->kind) {
3601         case EXPR_UNARY_NOT: {
3602                 const unary_expression_t *unary_expression = &expression->unary;
3603                 create_condition_evaluation(unary_expression->value, false_block,
3604                                             true_block);
3605                 return NULL;
3606         }
3607         case EXPR_BINARY_LOGICAL_AND: {
3608                 const binary_expression_t *binary_expression = &expression->binary;
3609
3610                 ir_node *extra_block = new_immBlock();
3611                 create_condition_evaluation(binary_expression->left, extra_block,
3612                                             false_block);
3613                 mature_immBlock(extra_block);
3614                 set_cur_block(extra_block);
3615                 create_condition_evaluation(binary_expression->right, true_block,
3616                                             false_block);
3617                 return NULL;
3618         }
3619         case EXPR_BINARY_LOGICAL_OR: {
3620                 const binary_expression_t *binary_expression = &expression->binary;
3621
3622                 ir_node *extra_block = new_immBlock();
3623                 create_condition_evaluation(binary_expression->left, true_block,
3624                                             extra_block);
3625                 mature_immBlock(extra_block);
3626                 set_cur_block(extra_block);
3627                 create_condition_evaluation(binary_expression->right, true_block,
3628                                             false_block);
3629                 return NULL;
3630         }
3631         default:
3632                 break;
3633         }
3634
3635         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3636         ir_node  *cond_expr  = _expression_to_firm(expression);
3637         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3638         ir_node  *cond       = new_d_Cond(dbgi, condition);
3639         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3640         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3641
3642         /* set branch prediction info based on __builtin_expect */
3643         if (is_builtin_expect(expression) && is_Cond(cond)) {
3644                 call_argument_t *argument = expression->call.arguments->next;
3645                 if (is_constant_expression(argument->expression)) {
3646                         bool             cnst = fold_constant_to_bool(argument->expression);
3647                         cond_jmp_predicate pred;
3648
3649                         if (cnst == false) {
3650                                 pred = COND_JMP_PRED_FALSE;
3651                         } else {
3652                                 pred = COND_JMP_PRED_TRUE;
3653                         }
3654                         set_Cond_jmp_pred(cond, pred);
3655                 }
3656         }
3657
3658         add_immBlock_pred(true_block, true_proj);
3659         add_immBlock_pred(false_block, false_proj);
3660
3661         set_cur_block(NULL);
3662         return cond_expr;
3663 }
3664
3665 static void create_variable_entity(entity_t *variable,
3666                                    declaration_kind_t declaration_kind,
3667                                    ir_type *parent_type)
3668 {
3669         assert(variable->kind == ENTITY_VARIABLE);
3670         type_t    *type = skip_typeref(variable->declaration.type);
3671
3672         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3673         ir_type   *const irtype    = get_ir_type(type);
3674         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3675         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3676         unsigned         alignment = variable->declaration.alignment;
3677
3678         set_entity_alignment(irentity, alignment);
3679
3680         handle_decl_modifiers(irentity, variable);
3681
3682         variable->declaration.kind  = (unsigned char) declaration_kind;
3683         variable->variable.v.entity = irentity;
3684         set_entity_variability(irentity, variability_uninitialized);
3685         set_entity_ld_ident(irentity, create_ld_ident(variable));
3686
3687         if (parent_type == get_tls_type())
3688                 set_entity_allocation(irentity, allocation_automatic);
3689         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3690                 set_entity_allocation(irentity, allocation_static);
3691
3692         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3693                 set_entity_volatility(irentity, volatility_is_volatile);
3694         }
3695 }
3696
3697
3698 typedef struct type_path_entry_t type_path_entry_t;
3699 struct type_path_entry_t {
3700         type_t           *type;
3701         ir_initializer_t *initializer;
3702         size_t            index;
3703         entity_t         *compound_entry;
3704 };
3705
3706 typedef struct type_path_t type_path_t;
3707 struct type_path_t {
3708         type_path_entry_t *path;
3709         type_t            *top_type;
3710         bool               invalid;
3711 };
3712
3713 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3714 {
3715         size_t len = ARR_LEN(path->path);
3716
3717         for (size_t i = 0; i < len; ++i) {
3718                 const type_path_entry_t *entry = & path->path[i];
3719
3720                 type_t *type = skip_typeref(entry->type);
3721                 if (is_type_compound(type)) {
3722                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3723                 } else if (is_type_array(type)) {
3724                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3725                 } else {
3726                         fprintf(stderr, "-INVALID-");
3727                 }
3728         }
3729         fprintf(stderr, "  (");
3730         print_type(path->top_type);
3731         fprintf(stderr, ")");
3732 }
3733
3734 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3735 {
3736         size_t len = ARR_LEN(path->path);
3737         assert(len > 0);
3738         return & path->path[len-1];
3739 }
3740
3741 static type_path_entry_t *append_to_type_path(type_path_t *path)
3742 {
3743         size_t len = ARR_LEN(path->path);
3744         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3745
3746         type_path_entry_t *result = & path->path[len];
3747         memset(result, 0, sizeof(result[0]));
3748         return result;
3749 }
3750
3751 static size_t get_compound_member_count(const compound_type_t *type)
3752 {
3753         compound_t *compound  = type->compound;
3754         size_t      n_members = 0;
3755         entity_t   *member    = compound->members.entities;
3756         for ( ; member != NULL; member = member->base.next) {
3757                 ++n_members;
3758         }
3759
3760         return n_members;
3761 }
3762
3763 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3764 {
3765         type_t *orig_top_type = path->top_type;
3766         type_t *top_type      = skip_typeref(orig_top_type);
3767
3768         assert(is_type_compound(top_type) || is_type_array(top_type));
3769
3770         if (ARR_LEN(path->path) == 0) {
3771                 return NULL;
3772         } else {
3773                 type_path_entry_t *top         = get_type_path_top(path);
3774                 ir_initializer_t  *initializer = top->initializer;
3775                 return get_initializer_compound_value(initializer, top->index);
3776         }
3777 }
3778
3779 static void descend_into_subtype(type_path_t *path)
3780 {
3781         type_t *orig_top_type = path->top_type;
3782         type_t *top_type      = skip_typeref(orig_top_type);
3783
3784         assert(is_type_compound(top_type) || is_type_array(top_type));
3785
3786         ir_initializer_t *initializer = get_initializer_entry(path);
3787
3788         type_path_entry_t *top = append_to_type_path(path);
3789         top->type              = top_type;
3790
3791         size_t len;
3792
3793         if (is_type_compound(top_type)) {
3794                 compound_t *compound = top_type->compound.compound;
3795                 entity_t   *entry    = compound->members.entities;
3796
3797                 top->compound_entry = entry;
3798                 top->index          = 0;
3799                 len                 = get_compound_member_count(&top_type->compound);
3800                 if (entry != NULL) {
3801                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3802                         path->top_type = entry->declaration.type;
3803                 }
3804         } else {
3805                 assert(is_type_array(top_type));
3806                 assert(top_type->array.size > 0);
3807
3808                 top->index     = 0;
3809                 path->top_type = top_type->array.element_type;
3810                 len            = top_type->array.size;
3811         }
3812         if (initializer == NULL
3813                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3814                 initializer = create_initializer_compound(len);
3815                 /* we have to set the entry at the 2nd latest path entry... */
3816                 size_t path_len = ARR_LEN(path->path);
3817                 assert(path_len >= 1);
3818                 if (path_len > 1) {
3819                         type_path_entry_t *entry        = & path->path[path_len-2];
3820                         ir_initializer_t  *tinitializer = entry->initializer;
3821                         set_initializer_compound_value(tinitializer, entry->index,
3822                                                        initializer);
3823                 }
3824         }
3825         top->initializer = initializer;
3826 }
3827
3828 static void ascend_from_subtype(type_path_t *path)
3829 {
3830         type_path_entry_t *top = get_type_path_top(path);
3831
3832         path->top_type = top->type;
3833
3834         size_t len = ARR_LEN(path->path);
3835         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3836 }
3837
3838 static void walk_designator(type_path_t *path, const designator_t *designator)
3839 {
3840         /* designators start at current object type */
3841         ARR_RESIZE(type_path_entry_t, path->path, 1);
3842
3843         for ( ; designator != NULL; designator = designator->next) {
3844                 type_path_entry_t *top         = get_type_path_top(path);
3845                 type_t            *orig_type   = top->type;
3846                 type_t            *type        = skip_typeref(orig_type);
3847
3848                 if (designator->symbol != NULL) {
3849                         assert(is_type_compound(type));
3850                         size_t    index  = 0;
3851                         symbol_t *symbol = designator->symbol;
3852
3853                         compound_t *compound = type->compound.compound;
3854                         entity_t   *iter     = compound->members.entities;
3855                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3856                                 if (iter->base.symbol == symbol) {
3857                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3858                                         break;
3859                                 }
3860                         }
3861                         assert(iter != NULL);
3862
3863                         /* revert previous initialisations of other union elements */
3864                         if (type->kind == TYPE_COMPOUND_UNION) {
3865                                 ir_initializer_t *initializer = top->initializer;
3866                                 if (initializer != NULL
3867                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3868                                         /* are we writing to a new element? */
3869                                         ir_initializer_t *oldi
3870                                                 = get_initializer_compound_value(initializer, index);
3871                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3872                                                 /* clear initializer */
3873                                                 size_t len
3874                                                         = get_initializer_compound_n_entries(initializer);
3875                                                 ir_initializer_t *nulli = get_initializer_null();
3876                                                 for (size_t i = 0; i < len; ++i) {
3877                                                         set_initializer_compound_value(initializer, i,
3878                                                                                        nulli);
3879                                                 }
3880                                         }
3881                                 }
3882                         }
3883
3884                         top->type           = orig_type;
3885                         top->compound_entry = iter;
3886                         top->index          = index;
3887                         orig_type           = iter->declaration.type;
3888                 } else {
3889                         expression_t *array_index = designator->array_index;
3890                         assert(designator->array_index != NULL);
3891                         assert(is_type_array(type));
3892
3893                         long index = fold_constant_to_int(array_index);
3894                         assert(index >= 0);
3895 #ifndef NDEBUG
3896                         if (type->array.size_constant) {
3897                                 long array_size = type->array.size;
3898                                 assert(index < array_size);
3899                         }
3900 #endif
3901
3902                         top->type  = orig_type;
3903                         top->index = (size_t) index;
3904                         orig_type  = type->array.element_type;
3905                 }
3906                 path->top_type = orig_type;
3907
3908                 if (designator->next != NULL) {
3909                         descend_into_subtype(path);
3910                 }
3911         }
3912
3913         path->invalid  = false;
3914 }
3915
3916 static void advance_current_object(type_path_t *path)
3917 {
3918         if (path->invalid) {
3919                 /* TODO: handle this... */
3920                 panic("invalid initializer in ast2firm (excessive elements)");
3921         }
3922
3923         type_path_entry_t *top = get_type_path_top(path);
3924
3925         type_t *type = skip_typeref(top->type);
3926         if (is_type_union(type)) {
3927                 /* only the first element is initialized in unions */
3928                 top->compound_entry = NULL;
3929         } else if (is_type_struct(type)) {
3930                 entity_t *entry = top->compound_entry;
3931
3932                 top->index++;
3933                 entry               = entry->base.next;
3934                 top->compound_entry = entry;
3935                 if (entry != NULL) {
3936                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3937                         path->top_type = entry->declaration.type;
3938                         return;
3939                 }
3940         } else {
3941                 assert(is_type_array(type));
3942
3943                 top->index++;
3944                 if (!type->array.size_constant || top->index < type->array.size) {
3945                         return;
3946                 }
3947         }
3948
3949         /* we're past the last member of the current sub-aggregate, try if we
3950          * can ascend in the type hierarchy and continue with another subobject */
3951         size_t len = ARR_LEN(path->path);
3952
3953         if (len > 1) {
3954                 ascend_from_subtype(path);
3955                 advance_current_object(path);
3956         } else {
3957                 path->invalid = true;
3958         }
3959 }
3960
3961
3962 static ir_initializer_t *create_ir_initializer(
3963                 const initializer_t *initializer, type_t *type);
3964
3965 static ir_initializer_t *create_ir_initializer_value(
3966                 const initializer_value_t *initializer)
3967 {
3968         if (is_type_compound(initializer->value->base.type)) {
3969                 panic("initializer creation for compounds not implemented yet");
3970         }
3971         type_t       *type = initializer->value->base.type;
3972         expression_t *expr = initializer->value;
3973         if (initializer_use_bitfield_basetype) {
3974                 type_t *skipped = skip_typeref(type);
3975                 if (skipped->kind == TYPE_BITFIELD) {
3976                         /* remove the bitfield cast... */
3977                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
3978                         expr = expr->unary.value;
3979                         type = skipped->bitfield.base_type;
3980                 }
3981         }
3982         ir_node *value = expression_to_firm(expr);
3983         ir_mode *mode  = get_ir_mode_storage(type);
3984         value          = create_conv(NULL, value, mode);
3985         return create_initializer_const(value);
3986 }
3987
3988 /** test wether type can be initialized by a string constant */
3989 static bool is_string_type(type_t *type)
3990 {
3991         type_t *inner;
3992         if (is_type_pointer(type)) {
3993                 inner = skip_typeref(type->pointer.points_to);
3994         } else if(is_type_array(type)) {
3995                 inner = skip_typeref(type->array.element_type);
3996         } else {
3997                 return false;
3998         }
3999
4000         return is_type_integer(inner);
4001 }
4002
4003 static ir_initializer_t *create_ir_initializer_list(
4004                 const initializer_list_t *initializer, type_t *type)
4005 {
4006         type_path_t path;
4007         memset(&path, 0, sizeof(path));
4008         path.top_type = type;
4009         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4010
4011         descend_into_subtype(&path);
4012
4013         for (size_t i = 0; i < initializer->len; ++i) {
4014                 const initializer_t *sub_initializer = initializer->initializers[i];
4015
4016                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4017                         walk_designator(&path, sub_initializer->designator.designator);
4018                         continue;
4019                 }
4020
4021                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4022                         /* we might have to descend into types until we're at a scalar
4023                          * type */
4024                         while(true) {
4025                                 type_t *orig_top_type = path.top_type;
4026                                 type_t *top_type      = skip_typeref(orig_top_type);
4027
4028                                 if (is_type_scalar(top_type))
4029                                         break;
4030                                 descend_into_subtype(&path);
4031                         }
4032                 } else if (sub_initializer->kind == INITIALIZER_STRING
4033                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4034                         /* we might have to descend into types until we're at a scalar
4035                          * type */
4036                         while (true) {
4037                                 type_t *orig_top_type = path.top_type;
4038                                 type_t *top_type      = skip_typeref(orig_top_type);
4039
4040                                 if (is_string_type(top_type))
4041                                         break;
4042                                 descend_into_subtype(&path);
4043                         }
4044                 }
4045
4046                 ir_initializer_t *sub_irinitializer
4047                         = create_ir_initializer(sub_initializer, path.top_type);
4048
4049                 size_t path_len = ARR_LEN(path.path);
4050                 assert(path_len >= 1);
4051                 type_path_entry_t *entry        = & path.path[path_len-1];
4052                 ir_initializer_t  *tinitializer = entry->initializer;
4053                 set_initializer_compound_value(tinitializer, entry->index,
4054                                                sub_irinitializer);
4055
4056                 advance_current_object(&path);
4057         }
4058
4059         assert(ARR_LEN(path.path) >= 1);
4060         ir_initializer_t *result = path.path[0].initializer;
4061         DEL_ARR_F(path.path);
4062
4063         return result;
4064 }
4065
4066 static ir_initializer_t *create_ir_initializer_string(
4067                 const initializer_string_t *initializer, type_t *type)
4068 {
4069         type = skip_typeref(type);
4070
4071         size_t            string_len    = initializer->string.size;
4072         assert(type->kind == TYPE_ARRAY);
4073         assert(type->array.size_constant);
4074         size_t            len           = type->array.size;
4075         ir_initializer_t *irinitializer = create_initializer_compound(len);
4076
4077         const char *string = initializer->string.begin;
4078         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4079
4080         for (size_t i = 0; i < len; ++i) {
4081                 char c = 0;
4082                 if (i < string_len)
4083                         c = string[i];
4084
4085                 tarval           *tv = new_tarval_from_long(c, mode);
4086                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4087
4088                 set_initializer_compound_value(irinitializer, i, char_initializer);
4089         }
4090
4091         return irinitializer;
4092 }
4093
4094 static ir_initializer_t *create_ir_initializer_wide_string(
4095                 const initializer_wide_string_t *initializer, type_t *type)
4096 {
4097         size_t            string_len    = initializer->string.size;
4098         assert(type->kind == TYPE_ARRAY);
4099         assert(type->array.size_constant);
4100         size_t            len           = type->array.size;
4101         ir_initializer_t *irinitializer = create_initializer_compound(len);
4102
4103         const wchar_rep_t *string = initializer->string.begin;
4104         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
4105
4106         for (size_t i = 0; i < len; ++i) {
4107                 wchar_rep_t c = 0;
4108                 if (i < string_len) {
4109                         c = string[i];
4110                 }
4111                 tarval *tv = new_tarval_from_long(c, mode);
4112                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4113
4114                 set_initializer_compound_value(irinitializer, i, char_initializer);
4115         }
4116
4117         return irinitializer;
4118 }
4119
4120 static ir_initializer_t *create_ir_initializer(
4121                 const initializer_t *initializer, type_t *type)
4122 {
4123         switch(initializer->kind) {
4124                 case INITIALIZER_STRING:
4125                         return create_ir_initializer_string(&initializer->string, type);
4126
4127                 case INITIALIZER_WIDE_STRING:
4128                         return create_ir_initializer_wide_string(&initializer->wide_string,
4129                                                                  type);
4130
4131                 case INITIALIZER_LIST:
4132                         return create_ir_initializer_list(&initializer->list, type);
4133
4134                 case INITIALIZER_VALUE:
4135                         return create_ir_initializer_value(&initializer->value);
4136
4137                 case INITIALIZER_DESIGNATOR:
4138                         panic("unexpected designator initializer found");
4139         }
4140         panic("unknown initializer");
4141 }
4142
4143 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4144                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4145 {
4146         switch(get_initializer_kind(initializer)) {
4147         case IR_INITIALIZER_NULL: {
4148                 /* NULL is undefined for dynamic initializers */
4149                 return;
4150         }
4151         case IR_INITIALIZER_CONST: {
4152                 ir_node *node     = get_initializer_const_value(initializer);
4153                 ir_mode *mode     = get_irn_mode(node);
4154                 ir_type *ent_type = get_entity_type(entity);
4155
4156                 /* is it a bitfield type? */
4157                 if (is_Primitive_type(ent_type) &&
4158                                 get_primitive_base_type(ent_type) != NULL) {
4159                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4160                         return;
4161                 }
4162
4163                 assert(get_type_mode(type) == mode);
4164                 ir_node *mem    = get_store();
4165                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4166                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4167                 set_store(proj_m);
4168                 return;
4169         }
4170         case IR_INITIALIZER_TARVAL: {
4171                 tarval  *tv       = get_initializer_tarval_value(initializer);
4172                 ir_mode *mode     = get_tarval_mode(tv);
4173                 ir_node *cnst     = new_d_Const(dbgi, tv);
4174                 ir_type *ent_type = get_entity_type(entity);
4175
4176                 /* is it a bitfield type? */
4177                 if (is_Primitive_type(ent_type) &&
4178                                 get_primitive_base_type(ent_type) != NULL) {
4179                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4180                         return;
4181                 }
4182
4183                 assert(get_type_mode(type) == mode);
4184                 ir_node *mem    = get_store();
4185                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4186                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4187                 set_store(proj_m);
4188                 return;
4189         }
4190         case IR_INITIALIZER_COMPOUND: {
4191                 assert(is_compound_type(type));
4192                 int n_members;
4193                 if (is_Array_type(type)) {
4194                         assert(has_array_upper_bound(type, 0));
4195                         n_members = get_array_upper_bound_int(type, 0);
4196                 } else {
4197                         n_members = get_compound_n_members(type);
4198                 }
4199
4200                 if (get_initializer_compound_n_entries(initializer)
4201                                 != (unsigned) n_members)
4202                         panic("initializer doesn't match compound type");
4203
4204                 for (int i = 0; i < n_members; ++i) {
4205                         ir_node   *addr;
4206                         ir_type   *irtype;
4207                         ir_entity *sub_entity;
4208                         if (is_Array_type(type)) {
4209                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4210                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4211                                 ir_node   *in[1]    = { cnst };
4212                                 irtype     = get_array_element_type(type);
4213                                 sub_entity = get_array_element_entity(type);
4214                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4215                                                        sub_entity);
4216                         } else {
4217                                 sub_entity = get_compound_member(type, i);
4218                                 irtype     = get_entity_type(sub_entity);
4219                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4220                                                              sub_entity);
4221                         }
4222
4223                         ir_initializer_t *sub_init
4224                                 = get_initializer_compound_value(initializer, i);
4225
4226                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4227                                                        addr);
4228                 }
4229                 return;
4230         }
4231         }
4232
4233         panic("invalid IR_INITIALIZER found");
4234 }
4235
4236 static void create_dynamic_initializer(ir_initializer_t *initializer,
4237                 dbg_info *dbgi, ir_entity *entity)
4238 {
4239         ir_node *frame     = get_irg_frame(current_ir_graph);
4240         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4241         ir_type *type      = get_entity_type(entity);
4242
4243         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4244 }
4245
4246 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4247                                      ir_entity *entity, type_t *type)
4248 {
4249         ir_node *memory = get_store();
4250         ir_node *nomem  = new_NoMem();
4251         ir_node *frame  = get_irg_frame(current_ir_graph);
4252         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4253
4254         if (initializer->kind == INITIALIZER_VALUE) {
4255                 initializer_value_t *initializer_value = &initializer->value;
4256
4257                 ir_node *value = expression_to_firm(initializer_value->value);
4258                 type = skip_typeref(type);
4259                 assign_value(dbgi, addr, type, value);
4260                 return;
4261         }
4262
4263         if (!is_constant_initializer(initializer)) {
4264                 bool old_initializer_use_bitfield_basetype
4265                         = initializer_use_bitfield_basetype;
4266                 initializer_use_bitfield_basetype = true;
4267                 ir_initializer_t *irinitializer
4268                         = create_ir_initializer(initializer, type);
4269                 initializer_use_bitfield_basetype
4270                         = old_initializer_use_bitfield_basetype;
4271
4272                 create_dynamic_initializer(irinitializer, dbgi, entity);
4273                 return;
4274         }
4275
4276         /* create the ir_initializer */
4277         ir_graph *const old_current_ir_graph = current_ir_graph;
4278         current_ir_graph = get_const_code_irg();
4279
4280         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4281
4282         assert(current_ir_graph == get_const_code_irg());
4283         current_ir_graph = old_current_ir_graph;
4284
4285         /* create a "template" entity which is copied to the entity on the stack */
4286         ident     *const id          = id_unique("initializer.%u");
4287         ir_type   *const irtype      = get_ir_type(type);
4288         ir_type   *const global_type = get_glob_type();
4289         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4290         set_entity_ld_ident(init_entity, id);
4291
4292         set_entity_variability(init_entity, variability_initialized);
4293         set_entity_visibility(init_entity, visibility_local);
4294         set_entity_allocation(init_entity, allocation_static);
4295
4296         set_entity_initializer(init_entity, irinitializer);
4297
4298         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4299         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4300
4301         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4302         set_store(copyb_mem);
4303 }
4304
4305 static void create_initializer_local_variable_entity(entity_t *entity)
4306 {
4307         assert(entity->kind == ENTITY_VARIABLE);
4308         initializer_t *initializer = entity->variable.initializer;
4309         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4310         ir_entity     *irentity    = entity->variable.v.entity;
4311         type_t        *type        = entity->declaration.type;
4312
4313         create_local_initializer(initializer, dbgi, irentity, type);
4314 }
4315
4316 static void create_variable_initializer(entity_t *entity)
4317 {
4318         assert(entity->kind == ENTITY_VARIABLE);
4319         initializer_t *initializer = entity->variable.initializer;
4320         if (initializer == NULL)
4321                 return;
4322
4323         declaration_kind_t declaration_kind
4324                 = (declaration_kind_t) entity->declaration.kind;
4325         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4326                 create_initializer_local_variable_entity(entity);
4327                 return;
4328         }
4329
4330         type_t            *type = entity->declaration.type;
4331         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4332
4333         if (initializer->kind == INITIALIZER_VALUE) {
4334                 initializer_value_t *initializer_value = &initializer->value;
4335                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4336
4337                 ir_node *value = expression_to_firm(initializer_value->value);
4338
4339                 type_t  *type = initializer_value->value->base.type;
4340                 ir_mode *mode = get_ir_mode_storage(type);
4341                 value = create_conv(dbgi, value, mode);
4342                 value = do_strict_conv(dbgi, value);
4343
4344                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4345                         set_value(entity->variable.v.value_number, value);
4346                 } else {
4347                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4348
4349                         ir_entity *irentity = entity->variable.v.entity;
4350
4351                         if (tq & TYPE_QUALIFIER_CONST) {
4352                                 set_entity_variability(irentity, variability_constant);
4353                         } else {
4354                                 set_entity_variability(irentity, variability_initialized);
4355                         }
4356                         set_atomic_ent_value(irentity, value);
4357                 }
4358         } else {
4359                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4360                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4361
4362                 ir_entity        *irentity        = entity->variable.v.entity;
4363                 ir_initializer_t *irinitializer
4364                         = create_ir_initializer(initializer, type);
4365
4366                 if (tq & TYPE_QUALIFIER_CONST) {
4367                         set_entity_variability(irentity, variability_constant);
4368                 } else {
4369                         set_entity_variability(irentity, variability_initialized);
4370                 }
4371                 set_entity_initializer(irentity, irinitializer);
4372         }
4373 }
4374
4375 static void create_variable_length_array(entity_t *entity)
4376 {
4377         assert(entity->kind == ENTITY_VARIABLE);
4378         assert(entity->variable.initializer == NULL);
4379
4380         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4381         entity->variable.v.vla_base = NULL;
4382
4383         /* TODO: record VLA somewhere so we create the free node when we leave
4384          * it's scope */
4385 }
4386
4387 static void allocate_variable_length_array(entity_t *entity)
4388 {
4389         assert(entity->kind == ENTITY_VARIABLE);
4390         assert(entity->variable.initializer == NULL);
4391         assert(get_cur_block() != NULL);
4392
4393         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4394         type_t   *type      = entity->declaration.type;
4395         ir_type  *el_type   = get_ir_type(type->array.element_type);
4396
4397         /* make sure size_node is calculated */
4398         get_type_size_node(type);
4399         ir_node  *elems = type->array.size_node;
4400         ir_node  *mem   = get_store();
4401         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4402
4403         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4404         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4405         set_store(proj_m);
4406
4407         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4408         entity->variable.v.vla_base = addr;
4409 }
4410
4411 /**
4412  * Creates a Firm local variable from a declaration.
4413  */
4414 static void create_local_variable(entity_t *entity)
4415 {
4416         assert(entity->kind == ENTITY_VARIABLE);
4417         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4418
4419         bool needs_entity = entity->variable.address_taken;
4420         type_t *type = skip_typeref(entity->declaration.type);
4421
4422         /* is it a variable length array? */
4423         if (is_type_array(type) && !type->array.size_constant) {
4424                 create_variable_length_array(entity);
4425                 return;
4426         } else if (is_type_array(type) || is_type_compound(type)) {
4427                 needs_entity = true;
4428         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4429                 needs_entity = true;
4430         }
4431
4432         if (needs_entity) {
4433                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4434                 create_variable_entity(entity,
4435                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4436                                        frame_type);
4437         } else {
4438                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4439                 entity->variable.v.value_number = next_value_number_function;
4440                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4441                                         entity);
4442                 ++next_value_number_function;
4443         }
4444 }
4445
4446 static void create_local_static_variable(entity_t *entity)
4447 {
4448         assert(entity->kind == ENTITY_VARIABLE);
4449         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4450
4451         type_t   *type           = skip_typeref(entity->declaration.type);
4452         ir_type  *const var_type = entity->variable.thread_local ?
4453                 get_tls_type() : get_glob_type();
4454         ir_type  *const irtype   = get_ir_type(type);
4455         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4456
4457         size_t l = strlen(entity->base.symbol->string);
4458         char   buf[l + sizeof(".%u")];
4459         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4460         ident     *const id = id_unique(buf);
4461
4462         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4463
4464         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4465                 set_entity_volatility(irentity, volatility_is_volatile);
4466         }
4467
4468         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4469         entity->variable.v.entity = irentity;
4470
4471         set_entity_ld_ident(irentity, id);
4472         set_entity_variability(irentity, variability_uninitialized);
4473         set_entity_visibility(irentity, visibility_local);
4474         set_entity_allocation(irentity, entity->variable.thread_local ?
4475                 allocation_automatic : allocation_static);
4476
4477         ir_graph *const old_current_ir_graph = current_ir_graph;
4478         current_ir_graph = get_const_code_irg();
4479
4480         create_variable_initializer(entity);
4481
4482         assert(current_ir_graph == get_const_code_irg());
4483         current_ir_graph = old_current_ir_graph;
4484 }
4485
4486
4487
4488 static void return_statement_to_firm(return_statement_t *statement)
4489 {
4490         if (get_cur_block() == NULL)
4491                 return;
4492
4493         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4494         type_t   *type        = current_function_entity->declaration.type;
4495         ir_type  *func_irtype = get_ir_type(type);
4496
4497
4498         ir_node *in[1];
4499         int      in_len;
4500         if (get_method_n_ress(func_irtype) > 0) {
4501                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4502
4503                 if (statement->value != NULL) {
4504                         ir_node *node = expression_to_firm(statement->value);
4505                         if (!is_compound_type(res_type)) {
4506                                 type_t  *type = statement->value->base.type;
4507                                 ir_mode *mode = get_ir_mode_storage(type);
4508                                 node          = create_conv(dbgi, node, mode);
4509                                 node          = do_strict_conv(dbgi, node);
4510                         }
4511                         in[0] = node;
4512                 } else {
4513                         ir_mode *mode;
4514                         if (is_compound_type(res_type)) {
4515                                 mode = mode_P_data;
4516                         } else {
4517                                 mode = get_type_mode(res_type);
4518                         }
4519                         in[0] = new_Unknown(mode);
4520                 }
4521                 in_len = 1;
4522         } else {
4523                 /* build return_value for its side effects */
4524                 if (statement->value != NULL) {
4525                         expression_to_firm(statement->value);
4526                 }
4527                 in_len = 0;
4528         }
4529
4530         ir_node  *store = get_store();
4531         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4532
4533         ir_node *end_block = get_irg_end_block(current_ir_graph);
4534         add_immBlock_pred(end_block, ret);
4535
4536         set_cur_block(NULL);
4537 }
4538
4539 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4540 {
4541         if (get_cur_block() == NULL)
4542                 return NULL;
4543
4544         return expression_to_firm(statement->expression);
4545 }
4546
4547 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4548 {
4549         entity_t *entity = compound->scope.entities;
4550         for ( ; entity != NULL; entity = entity->base.next) {
4551                 if (!is_declaration(entity))
4552                         continue;
4553
4554                 create_local_declaration(entity);
4555         }
4556
4557         ir_node     *result    = NULL;
4558         statement_t *statement = compound->statements;
4559         for ( ; statement != NULL; statement = statement->base.next) {
4560                 if (statement->base.next == NULL
4561                                 && statement->kind == STATEMENT_EXPRESSION) {
4562                         result = expression_statement_to_firm(
4563                                         &statement->expression);
4564                         break;
4565                 }
4566                 statement_to_firm(statement);
4567         }
4568
4569         return result;
4570 }
4571
4572 static void create_global_variable(entity_t *entity)
4573 {
4574         assert(entity->kind == ENTITY_VARIABLE);
4575
4576         ir_visibility vis;
4577         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4578                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4579                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4580                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4581
4582                 default: panic("Invalid storage class for global variable");
4583         }
4584
4585         ir_type *var_type = entity->variable.thread_local ?
4586                 get_tls_type() : get_glob_type();
4587         create_variable_entity(entity,
4588                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4589         set_entity_visibility(entity->variable.v.entity, vis);
4590 }
4591
4592 static void create_local_declaration(entity_t *entity)
4593 {
4594         assert(is_declaration(entity));
4595
4596         /* construct type */
4597         (void) get_ir_type(entity->declaration.type);
4598         if (entity->base.symbol == NULL) {
4599                 return;
4600         }
4601
4602         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4603         case STORAGE_CLASS_STATIC:
4604                 if (entity->kind == ENTITY_FUNCTION) {
4605                         (void)get_function_entity(entity, NULL);
4606                 } else {
4607                         create_local_static_variable(entity);
4608                 }
4609                 return;
4610         case STORAGE_CLASS_EXTERN:
4611                 if (entity->kind == ENTITY_FUNCTION) {
4612                         assert(entity->function.statement == NULL);
4613                         (void)get_function_entity(entity, NULL);
4614                 } else {
4615                         create_global_variable(entity);
4616                         create_variable_initializer(entity);
4617                 }
4618                 return;
4619         case STORAGE_CLASS_NONE:
4620         case STORAGE_CLASS_AUTO:
4621         case STORAGE_CLASS_REGISTER:
4622                 if (entity->kind == ENTITY_FUNCTION) {
4623                         if (entity->function.statement != NULL) {
4624                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4625                                 (void)get_function_entity(entity, owner);
4626                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4627                                 enqueue_inner_function(entity);
4628                         } else {
4629                                 (void)get_function_entity(entity, NULL);
4630                         }
4631                 } else {
4632                         create_local_variable(entity);
4633                 }
4634                 return;
4635         case STORAGE_CLASS_TYPEDEF:
4636                 break;
4637         }
4638         panic("invalid storage class found");
4639 }
4640
4641 static void initialize_local_declaration(entity_t *entity)
4642 {
4643         if (entity->base.symbol == NULL)
4644                 return;
4645
4646         // no need to emit code in dead blocks
4647         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4648                         && get_cur_block() == NULL)
4649                 return;
4650
4651         switch ((declaration_kind_t) entity->declaration.kind) {
4652         case DECLARATION_KIND_LOCAL_VARIABLE:
4653         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4654                 create_variable_initializer(entity);
4655                 return;
4656
4657         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4658                 allocate_variable_length_array(entity);
4659                 return;
4660
4661         case DECLARATION_KIND_COMPOUND_MEMBER:
4662         case DECLARATION_KIND_GLOBAL_VARIABLE:
4663         case DECLARATION_KIND_FUNCTION:
4664         case DECLARATION_KIND_INNER_FUNCTION:
4665                 return;
4666
4667         case DECLARATION_KIND_PARAMETER:
4668         case DECLARATION_KIND_PARAMETER_ENTITY:
4669                 panic("can't initialize parameters");
4670
4671         case DECLARATION_KIND_UNKNOWN:
4672                 panic("can't initialize unknown declaration");
4673         }
4674         panic("invalid declaration kind");
4675 }
4676
4677 static void declaration_statement_to_firm(declaration_statement_t *statement)
4678 {
4679         entity_t *entity = statement->declarations_begin;
4680         if (entity == NULL)
4681                 return;
4682
4683         entity_t *const last = statement->declarations_end;
4684         for ( ;; entity = entity->base.next) {
4685                 if (is_declaration(entity)) {
4686                         initialize_local_declaration(entity);
4687                 } else if (entity->kind == ENTITY_TYPEDEF) {
4688                         /* §6.7.7:3  Any array size expressions associated with variable length
4689                          * array declarators are evaluated each time the declaration of the
4690                          * typedef name is reached in the order of execution. */
4691                         type_t *const type = skip_typeref(entity->typedefe.type);
4692                         if (is_type_array(type) && type->array.is_vla)
4693                                 get_vla_size(&type->array);
4694                 }
4695                 if (entity == last)
4696                         break;
4697         }
4698 }
4699
4700 static void if_statement_to_firm(if_statement_t *statement)
4701 {
4702         ir_node *cur_block = get_cur_block();
4703
4704         ir_node *fallthrough_block = NULL;
4705
4706         /* the true (blocks) */
4707         ir_node *true_block = NULL;
4708         if (statement->true_statement != NULL) {
4709                 true_block = new_immBlock();
4710                 set_cur_block(true_block);
4711                 statement_to_firm(statement->true_statement);
4712                 if (get_cur_block() != NULL) {
4713                         ir_node *jmp = new_Jmp();
4714                         if (fallthrough_block == NULL)
4715                                 fallthrough_block = new_immBlock();
4716                         add_immBlock_pred(fallthrough_block, jmp);
4717                 }
4718         }
4719
4720         /* the false (blocks) */
4721         ir_node *false_block = NULL;
4722         if (statement->false_statement != NULL) {
4723                 false_block = new_immBlock();
4724                 set_cur_block(false_block);
4725
4726                 statement_to_firm(statement->false_statement);
4727                 if (get_cur_block() != NULL) {
4728                         ir_node *jmp = new_Jmp();
4729                         if (fallthrough_block == NULL)
4730                                 fallthrough_block = new_immBlock();
4731                         add_immBlock_pred(fallthrough_block, jmp);
4732                 }
4733         }
4734
4735         /* create the condition */
4736         if (cur_block != NULL) {
4737                 if (true_block == NULL || false_block == NULL) {
4738                         if (fallthrough_block == NULL)
4739                                 fallthrough_block = new_immBlock();
4740                         if (true_block == NULL)
4741                                 true_block = fallthrough_block;
4742                         if (false_block == NULL)
4743                                 false_block = fallthrough_block;
4744                 }
4745
4746                 set_cur_block(cur_block);
4747                 create_condition_evaluation(statement->condition, true_block,
4748                                             false_block);
4749         }
4750
4751         mature_immBlock(true_block);
4752         if (false_block != fallthrough_block && false_block != NULL) {
4753                 mature_immBlock(false_block);
4754         }
4755         if (fallthrough_block != NULL) {
4756                 mature_immBlock(fallthrough_block);
4757         }
4758
4759         set_cur_block(fallthrough_block);
4760 }
4761
4762 static void while_statement_to_firm(while_statement_t *statement)
4763 {
4764         ir_node *jmp = NULL;
4765         if (get_cur_block() != NULL) {
4766                 jmp = new_Jmp();
4767         }
4768
4769         /* create the header block */
4770         ir_node *header_block = new_immBlock();
4771         if (jmp != NULL) {
4772                 add_immBlock_pred(header_block, jmp);
4773         }
4774
4775         /* the loop body */
4776         ir_node *old_continue_label = continue_label;
4777         ir_node *old_break_label    = break_label;
4778         continue_label              = header_block;
4779         break_label                 = NULL;
4780
4781         ir_node *body_block = new_immBlock();
4782         set_cur_block(body_block);
4783         statement_to_firm(statement->body);
4784         ir_node *false_block = break_label;
4785
4786         assert(continue_label == header_block);
4787         continue_label = old_continue_label;
4788         break_label    = old_break_label;
4789
4790         if (get_cur_block() != NULL) {
4791                 jmp = new_Jmp();
4792                 add_immBlock_pred(header_block, jmp);
4793         }
4794
4795         /* shortcut for while(true) */
4796         if (is_constant_expression(statement->condition)
4797                         && fold_constant_to_bool(statement->condition) != 0) {
4798                 set_cur_block(header_block);
4799                 ir_node *header_jmp = new_Jmp();
4800                 add_immBlock_pred(body_block, header_jmp);
4801
4802                 keep_alive(body_block);
4803                 keep_all_memory(body_block);
4804                 set_cur_block(body_block);
4805         } else {
4806                 if (false_block == NULL) {
4807                         false_block = new_immBlock();
4808                 }
4809
4810                 /* create the condition */
4811                 set_cur_block(header_block);
4812
4813                 create_condition_evaluation(statement->condition, body_block,
4814                                             false_block);
4815         }
4816
4817         mature_immBlock(body_block);
4818         mature_immBlock(header_block);
4819         if (false_block != NULL) {
4820                 mature_immBlock(false_block);
4821         }
4822
4823         set_cur_block(false_block);
4824 }
4825
4826 static void do_while_statement_to_firm(do_while_statement_t *statement)
4827 {
4828         ir_node *jmp = NULL;
4829         if (get_cur_block() != NULL) {
4830                 jmp = new_Jmp();
4831         }
4832
4833         /* create the header block */
4834         ir_node *header_block = new_immBlock();
4835
4836         /* the loop body */
4837         ir_node *body_block = new_immBlock();
4838         if (jmp != NULL) {
4839                 add_immBlock_pred(body_block, jmp);
4840         }
4841
4842         ir_node *old_continue_label = continue_label;
4843         ir_node *old_break_label    = break_label;
4844         continue_label              = header_block;
4845         break_label                 = NULL;
4846
4847         set_cur_block(body_block);
4848         statement_to_firm(statement->body);
4849         ir_node *false_block = break_label;
4850
4851         assert(continue_label == header_block);
4852         continue_label = old_continue_label;
4853         break_label    = old_break_label;
4854
4855         if (get_cur_block() != NULL) {
4856                 ir_node *body_jmp = new_Jmp();
4857                 add_immBlock_pred(header_block, body_jmp);
4858                 mature_immBlock(header_block);
4859         }
4860
4861         if (false_block == NULL) {
4862                 false_block = new_immBlock();
4863         }
4864
4865         /* create the condition */
4866         set_cur_block(header_block);
4867
4868         create_condition_evaluation(statement->condition, body_block, false_block);
4869         mature_immBlock(body_block);
4870         mature_immBlock(header_block);
4871         mature_immBlock(false_block);
4872
4873         set_cur_block(false_block);
4874 }
4875
4876 static void for_statement_to_firm(for_statement_t *statement)
4877 {
4878         ir_node *jmp = NULL;
4879
4880         /* create declarations */
4881         entity_t *entity = statement->scope.entities;
4882         for ( ; entity != NULL; entity = entity->base.next) {
4883                 if (!is_declaration(entity))
4884                         continue;
4885
4886                 create_local_declaration(entity);
4887         }
4888
4889         if (get_cur_block() != NULL) {
4890                 entity = statement->scope.entities;
4891                 for ( ; entity != NULL; entity = entity->base.next) {
4892                         if (!is_declaration(entity))
4893                                 continue;
4894
4895                         initialize_local_declaration(entity);
4896                 }
4897
4898                 if (statement->initialisation != NULL) {
4899                         expression_to_firm(statement->initialisation);
4900                 }
4901
4902                 jmp = new_Jmp();
4903         }
4904
4905
4906         /* create the step block */
4907         ir_node *const step_block = new_immBlock();
4908         set_cur_block(step_block);
4909         if (statement->step != NULL) {
4910                 expression_to_firm(statement->step);
4911         }
4912         ir_node *const step_jmp = new_Jmp();
4913
4914         /* create the header block */
4915         ir_node *const header_block = new_immBlock();
4916         set_cur_block(header_block);
4917         if (jmp != NULL) {
4918                 add_immBlock_pred(header_block, jmp);
4919         }
4920         add_immBlock_pred(header_block, step_jmp);
4921
4922         /* the false block */
4923         ir_node *const false_block = new_immBlock();
4924
4925         /* the loop body */
4926         ir_node *body_block;
4927         if (statement->body != NULL) {
4928                 ir_node *const old_continue_label = continue_label;
4929                 ir_node *const old_break_label    = break_label;
4930                 continue_label = step_block;
4931                 break_label    = false_block;
4932
4933                 body_block = new_immBlock();
4934                 set_cur_block(body_block);
4935                 statement_to_firm(statement->body);
4936
4937                 assert(continue_label == step_block);
4938                 assert(break_label    == false_block);
4939                 continue_label = old_continue_label;
4940                 break_label    = old_break_label;
4941
4942                 if (get_cur_block() != NULL) {
4943                         jmp = new_Jmp();
4944                         add_immBlock_pred(step_block, jmp);
4945                 }
4946         } else {
4947                 body_block = step_block;
4948         }
4949
4950         /* create the condition */
4951         set_cur_block(header_block);
4952         if (statement->condition != NULL) {
4953                 create_condition_evaluation(statement->condition, body_block,
4954                                             false_block);
4955         } else {
4956                 keep_alive(header_block);
4957                 keep_all_memory(header_block);
4958                 jmp = new_Jmp();
4959                 add_immBlock_pred(body_block, jmp);
4960         }
4961
4962         mature_immBlock(body_block);
4963         mature_immBlock(false_block);
4964         mature_immBlock(step_block);
4965         mature_immBlock(header_block);
4966         mature_immBlock(false_block);
4967
4968         set_cur_block(false_block);
4969 }
4970
4971 static void create_jump_statement(const statement_t *statement,
4972                                   ir_node *target_block)
4973 {
4974         if (get_cur_block() == NULL)
4975                 return;
4976
4977         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4978         ir_node  *jump = new_d_Jmp(dbgi);
4979         add_immBlock_pred(target_block, jump);
4980
4981         set_cur_block(NULL);
4982 }
4983
4984 static ir_node *get_break_label(void)
4985 {
4986         if (break_label == NULL) {
4987                 break_label = new_immBlock();
4988         }
4989         return break_label;
4990 }
4991
4992 static void switch_statement_to_firm(switch_statement_t *statement)
4993 {
4994         ir_node  *first_block = get_cur_block();
4995         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4996         ir_node  *cond        = NULL;
4997         if (first_block != NULL) {
4998                 ir_node *expression = expression_to_firm(statement->expression);
4999                 cond                = new_d_Cond(dbgi, expression);
5000         }
5001
5002         set_cur_block(NULL);
5003
5004         ir_node *const old_switch_cond       = current_switch_cond;
5005         ir_node *const old_break_label       = break_label;
5006         const bool     old_saw_default_label = saw_default_label;
5007         saw_default_label                    = false;
5008         current_switch_cond                  = cond;
5009         break_label                          = NULL;
5010         switch_statement_t *const old_switch = current_switch;
5011         current_switch                       = statement;
5012
5013         /* determine a free number for the default label */
5014         unsigned long num_cases = 0;
5015         long def_nr = 0;
5016         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5017                 if (l->expression == NULL) {
5018                         /* default case */
5019                         continue;
5020                 }
5021                 if (l->last_case >= l->first_case)
5022                         num_cases += l->last_case - l->first_case + 1;
5023                 if (l->last_case > def_nr)
5024                         def_nr = l->last_case;
5025         }
5026
5027         if (def_nr == INT_MAX) {
5028                 /* Bad: an overflow will occur, we cannot be sure that the
5029                  * maximum + 1 is a free number. Scan the values a second
5030                  * time to find a free number.
5031                  */
5032                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5033
5034                 memset(bits, 0, (num_cases + 7) >> 3);
5035                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5036                         if (l->expression == NULL) {
5037                                 /* default case */
5038                                 continue;
5039                         }
5040                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5041                         if (start < num_cases && l->last_case >= 0) {
5042                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5043                                         (unsigned long)l->last_case : num_cases - 1;
5044                                 for (unsigned long cns = start; cns <= end; ++cns) {
5045                                         bits[cns >> 3] |= (1 << (cns & 7));
5046                                 }
5047                         }
5048                 }
5049                 /* We look at the first num_cases constants:
5050                  * Either they are dense, so we took the last (num_cases)
5051                  * one, or they are not dense, so we will find one free
5052                  * there...
5053                  */
5054                 unsigned long i;
5055                 for (i = 0; i < num_cases; ++i)
5056                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5057                                 break;
5058
5059                 free(bits);
5060                 def_nr = i;
5061         } else {
5062                 ++def_nr;
5063         }
5064         statement->default_proj_nr = def_nr;
5065
5066         if (statement->body != NULL) {
5067                 statement_to_firm(statement->body);
5068         }
5069
5070         if (get_cur_block() != NULL) {
5071                 ir_node *jmp = new_Jmp();
5072                 add_immBlock_pred(get_break_label(), jmp);
5073         }
5074
5075         if (!saw_default_label && first_block != NULL) {
5076                 set_cur_block(first_block);
5077                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
5078                                                         statement->default_proj_nr);
5079                 add_immBlock_pred(get_break_label(), proj);
5080         }
5081
5082         if (break_label != NULL) {
5083                 mature_immBlock(break_label);
5084         }
5085         set_cur_block(break_label);
5086
5087         assert(current_switch_cond == cond);
5088         current_switch      = old_switch;
5089         current_switch_cond = old_switch_cond;
5090         break_label         = old_break_label;
5091         saw_default_label   = old_saw_default_label;
5092 }
5093
5094 static void case_label_to_firm(const case_label_statement_t *statement)
5095 {
5096         if (statement->is_empty_range)
5097                 return;
5098
5099         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5100
5101         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5102
5103         ir_node *proj;
5104         ir_node *block = new_immBlock();
5105
5106         if (current_switch_cond != NULL) {
5107                 set_cur_block(get_nodes_block(current_switch_cond));
5108                 if (statement->expression != NULL) {
5109                         long pn     = statement->first_case;
5110                         long end_pn = statement->last_case;
5111                         assert(pn <= end_pn);
5112                         /* create jumps for all cases in the given range */
5113                         do {
5114                                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5115                                 add_immBlock_pred(block, proj);
5116                         } while (pn++ < end_pn);
5117                 } else {
5118                         saw_default_label = true;
5119                         proj = new_d_defaultProj(dbgi, current_switch_cond,
5120                                                                          current_switch->default_proj_nr);
5121
5122                         add_immBlock_pred(block, proj);
5123                 }
5124         }
5125
5126         if (fallthrough != NULL) {
5127                 add_immBlock_pred(block, fallthrough);
5128         }
5129         mature_immBlock(block);
5130         set_cur_block(block);
5131
5132         if (statement->statement != NULL) {
5133                 statement_to_firm(statement->statement);
5134         }
5135 }
5136
5137 static void label_to_firm(const label_statement_t *statement)
5138 {
5139         ir_node *block = get_label_block(statement->label);
5140
5141         if (get_cur_block() != NULL) {
5142                 ir_node *jmp = new_Jmp();
5143                 add_immBlock_pred(block, jmp);
5144         }
5145
5146         set_cur_block(block);
5147         keep_alive(block);
5148         keep_all_memory(block);
5149
5150         if (statement->statement != NULL) {
5151                 statement_to_firm(statement->statement);
5152         }
5153 }
5154
5155 static void goto_to_firm(const goto_statement_t *statement)
5156 {
5157         if (get_cur_block() == NULL)
5158                 return;
5159
5160         if (statement->expression) {
5161                 ir_node  *irn  = expression_to_firm(statement->expression);
5162                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5163                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5164
5165                 set_irn_link(ijmp, ijmp_list);
5166                 ijmp_list = ijmp;
5167         } else {
5168                 ir_node *block = get_label_block(statement->label);
5169                 ir_node *jmp   = new_Jmp();
5170                 add_immBlock_pred(block, jmp);
5171         }
5172         set_cur_block(NULL);
5173 }
5174
5175 static void asm_statement_to_firm(const asm_statement_t *statement)
5176 {
5177         bool needs_memory = false;
5178
5179         if (statement->is_volatile) {
5180                 needs_memory = true;
5181         }
5182
5183         size_t         n_clobbers = 0;
5184         asm_clobber_t *clobber    = statement->clobbers;
5185         for ( ; clobber != NULL; clobber = clobber->next) {
5186                 const char *clobber_str = clobber->clobber.begin;
5187
5188                 if (!be_is_valid_clobber(clobber_str)) {
5189                         errorf(&statement->base.source_position,
5190                                    "invalid clobber '%s' specified", clobber->clobber);
5191                         continue;
5192                 }
5193
5194                 if (strcmp(clobber_str, "memory") == 0) {
5195                         needs_memory = true;
5196                         continue;
5197                 }
5198
5199                 ident *id = new_id_from_str(clobber_str);
5200                 obstack_ptr_grow(&asm_obst, id);
5201                 ++n_clobbers;
5202         }
5203         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5204         ident **clobbers = NULL;
5205         if (n_clobbers > 0) {
5206                 clobbers = obstack_finish(&asm_obst);
5207         }
5208
5209         size_t n_inputs  = 0;
5210         asm_argument_t *argument = statement->inputs;
5211         for ( ; argument != NULL; argument = argument->next)
5212                 n_inputs++;
5213         size_t n_outputs = 0;
5214         argument = statement->outputs;
5215         for ( ; argument != NULL; argument = argument->next)
5216                 n_outputs++;
5217
5218         unsigned next_pos = 0;
5219
5220         ir_node *ins[n_inputs + n_outputs + 1];
5221         size_t   in_size = 0;
5222
5223         ir_asm_constraint tmp_in_constraints[n_outputs];
5224
5225         const expression_t *out_exprs[n_outputs];
5226         ir_node            *out_addrs[n_outputs];
5227         size_t              out_size = 0;
5228
5229         argument = statement->outputs;
5230         for ( ; argument != NULL; argument = argument->next) {
5231                 const char *constraints = argument->constraints.begin;
5232                 asm_constraint_flags_t asm_flags
5233                         = be_parse_asm_constraints(constraints);
5234
5235                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5236                         warningf(&statement->base.source_position,
5237                                "some constraints in '%s' are not supported", constraints);
5238                 }
5239                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5240                         errorf(&statement->base.source_position,
5241                                "some constraints in '%s' are invalid", constraints);
5242                         continue;
5243                 }
5244                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5245                         errorf(&statement->base.source_position,
5246                                "no write flag specified for output constraints '%s'",
5247                                constraints);
5248                         continue;
5249                 }
5250
5251                 unsigned pos = next_pos++;
5252                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5253                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5254                         expression_t *expr = argument->expression;
5255                         ir_node      *addr = expression_to_addr(expr);
5256                         /* in+output, construct an artifical same_as constraint on the
5257                          * input */
5258                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5259                                 char     buf[64];
5260                                 ir_node *value = get_value_from_lvalue(expr, addr);
5261
5262                                 snprintf(buf, sizeof(buf), "%u", pos);
5263
5264                                 ir_asm_constraint constraint;
5265                                 constraint.pos              = pos;
5266                                 constraint.constraint       = new_id_from_str(buf);
5267                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5268                                 tmp_in_constraints[in_size] = constraint;
5269                                 ins[in_size] = value;
5270
5271                                 ++in_size;
5272                         }
5273
5274                         out_exprs[out_size] = expr;
5275                         out_addrs[out_size] = addr;
5276                         ++out_size;
5277                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5278                         /* pure memory ops need no input (but we have to make sure we
5279                          * attach to the memory) */
5280                         assert(! (asm_flags &
5281                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5282                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5283                         needs_memory = true;
5284
5285                         /* we need to attach the address to the inputs */
5286                         expression_t *expr = argument->expression;
5287
5288                         ir_asm_constraint constraint;
5289                         constraint.pos              = pos;
5290                         constraint.constraint       = new_id_from_str(constraints);
5291                         constraint.mode             = NULL;
5292                         tmp_in_constraints[in_size] = constraint;
5293
5294                         ins[in_size]          = expression_to_addr(expr);
5295                         ++in_size;
5296                         continue;
5297                 } else {
5298                         errorf(&statement->base.source_position,
5299                                "only modifiers but no place set in constraints '%s'",
5300                                constraints);
5301                         continue;
5302                 }
5303
5304                 ir_asm_constraint constraint;
5305                 constraint.pos        = pos;
5306                 constraint.constraint = new_id_from_str(constraints);
5307                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5308
5309                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5310         }
5311         assert(obstack_object_size(&asm_obst)
5312                         == out_size * sizeof(ir_asm_constraint));
5313         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5314
5315
5316         obstack_grow(&asm_obst, tmp_in_constraints,
5317                      in_size * sizeof(tmp_in_constraints[0]));
5318         /* find and count input and output arguments */
5319         argument = statement->inputs;
5320         for ( ; argument != NULL; argument = argument->next) {
5321                 const char *constraints = argument->constraints.begin;
5322                 asm_constraint_flags_t asm_flags
5323                         = be_parse_asm_constraints(constraints);
5324
5325                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5326                         errorf(&statement->base.source_position,
5327                                "some constraints in '%s' are not supported", constraints);
5328                         continue;
5329                 }
5330                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5331                         errorf(&statement->base.source_position,
5332                                "some constraints in '%s' are invalid", constraints);
5333                         continue;
5334                 }
5335                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5336                         errorf(&statement->base.source_position,
5337                                "write flag specified for input constraints '%s'",
5338                                constraints);
5339                         continue;
5340                 }
5341
5342                 ir_node *input;
5343                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5344                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5345                         /* we can treat this as "normal" input */
5346                         input = expression_to_firm(argument->expression);
5347                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5348                         /* pure memory ops need no input (but we have to make sure we
5349                          * attach to the memory) */
5350                         assert(! (asm_flags &
5351                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5352                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5353                         needs_memory = true;
5354                         input = expression_to_addr(argument->expression);
5355                 } else {
5356                         errorf(&statement->base.source_position,
5357                                "only modifiers but no place set in constraints '%s'",
5358                                constraints);
5359                         continue;
5360                 }
5361
5362                 ir_asm_constraint constraint;
5363                 constraint.pos        = next_pos++;
5364                 constraint.constraint = new_id_from_str(constraints);
5365                 constraint.mode       = get_irn_mode(input);
5366
5367                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5368                 ins[in_size++] = input;
5369         }
5370
5371         if (needs_memory) {
5372                 ir_asm_constraint constraint;
5373                 constraint.pos        = next_pos++;
5374                 constraint.constraint = new_id_from_str("");
5375                 constraint.mode       = mode_M;
5376
5377                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5378                 ins[in_size++] = get_store();
5379         }
5380
5381         assert(obstack_object_size(&asm_obst)
5382                         == in_size * sizeof(ir_asm_constraint));
5383         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5384
5385         /* create asm node */
5386         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5387
5388         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5389
5390         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5391                                   out_size, output_constraints,
5392                                   n_clobbers, clobbers, asm_text);
5393
5394         if (statement->is_volatile) {
5395                 set_irn_pinned(node, op_pin_state_pinned);
5396         } else {
5397                 set_irn_pinned(node, op_pin_state_floats);
5398         }
5399
5400         /* create output projs & connect them */
5401         if (needs_memory) {
5402                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5403                 set_store(projm);
5404         }
5405
5406         size_t i;
5407         for (i = 0; i < out_size; ++i) {
5408                 const expression_t *out_expr = out_exprs[i];
5409                 long                pn       = i;
5410                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5411                 ir_node            *proj     = new_Proj(node, mode, pn);
5412                 ir_node            *addr     = out_addrs[i];
5413
5414                 set_value_for_expression_addr(out_expr, proj, addr);
5415         }
5416 }
5417
5418 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5419 {
5420         statement_to_firm(statement->try_statement);
5421         warningf(&statement->base.source_position, "structured exception handling ignored");
5422 }
5423
5424 static void     leave_statement_to_firm(leave_statement_t *statement)
5425 {
5426         errorf(&statement->base.source_position, "__leave not supported yet");
5427 }
5428
5429 /**
5430  * Transform a statement.
5431  */
5432 static void statement_to_firm(statement_t *statement)
5433 {
5434 #ifndef NDEBUG
5435         assert(!statement->base.transformed);
5436         statement->base.transformed = true;
5437 #endif
5438
5439         switch (statement->kind) {
5440         case STATEMENT_INVALID:
5441                 panic("invalid statement found");
5442         case STATEMENT_EMPTY:
5443                 /* nothing */
5444                 return;
5445         case STATEMENT_COMPOUND:
5446                 compound_statement_to_firm(&statement->compound);
5447                 return;
5448         case STATEMENT_RETURN:
5449                 return_statement_to_firm(&statement->returns);
5450                 return;
5451         case STATEMENT_EXPRESSION:
5452                 expression_statement_to_firm(&statement->expression);
5453                 return;
5454         case STATEMENT_IF:
5455                 if_statement_to_firm(&statement->ifs);
5456                 return;
5457         case STATEMENT_WHILE:
5458                 while_statement_to_firm(&statement->whiles);
5459                 return;
5460         case STATEMENT_DO_WHILE:
5461                 do_while_statement_to_firm(&statement->do_while);
5462                 return;
5463         case STATEMENT_DECLARATION:
5464                 declaration_statement_to_firm(&statement->declaration);
5465                 return;
5466         case STATEMENT_BREAK:
5467                 create_jump_statement(statement, get_break_label());
5468                 return;
5469         case STATEMENT_CONTINUE:
5470                 create_jump_statement(statement, continue_label);
5471                 return;
5472         case STATEMENT_SWITCH:
5473                 switch_statement_to_firm(&statement->switchs);
5474                 return;
5475         case STATEMENT_CASE_LABEL:
5476                 case_label_to_firm(&statement->case_label);
5477                 return;
5478         case STATEMENT_FOR:
5479                 for_statement_to_firm(&statement->fors);
5480                 return;
5481         case STATEMENT_LABEL:
5482                 label_to_firm(&statement->label);
5483                 return;
5484         case STATEMENT_GOTO:
5485                 goto_to_firm(&statement->gotos);
5486                 return;
5487         case STATEMENT_ASM:
5488                 asm_statement_to_firm(&statement->asms);
5489                 return;
5490         case STATEMENT_MS_TRY:
5491                 ms_try_statement_to_firm(&statement->ms_try);
5492                 return;
5493         case STATEMENT_LEAVE:
5494                 leave_statement_to_firm(&statement->leave);
5495                 return;
5496         }
5497         panic("statement not implemented");
5498 }
5499
5500 static int count_local_variables(const entity_t *entity,
5501                                  const entity_t *const last)
5502 {
5503         int count = 0;
5504         entity_t const *const end = last != NULL ? last->base.next : NULL;
5505         for (; entity != end; entity = entity->base.next) {
5506                 type_t *type;
5507                 bool    address_taken;
5508
5509                 if (entity->kind == ENTITY_VARIABLE) {
5510                         type          = skip_typeref(entity->declaration.type);
5511                         address_taken = entity->variable.address_taken;
5512                 } else if (entity->kind == ENTITY_PARAMETER) {
5513                         type          = skip_typeref(entity->declaration.type);
5514                         address_taken = entity->parameter.address_taken;
5515                 } else {
5516                         continue;
5517                 }
5518
5519                 if (!address_taken && is_type_scalar(type))
5520                         ++count;
5521         }
5522         return count;
5523 }
5524
5525 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5526 {
5527         int *const count = env;
5528
5529         switch (stmt->kind) {
5530         case STATEMENT_DECLARATION: {
5531                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5532                 *count += count_local_variables(decl_stmt->declarations_begin,
5533                                 decl_stmt->declarations_end);
5534                 break;
5535         }
5536
5537         case STATEMENT_FOR:
5538                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5539                 break;
5540
5541         default:
5542                 break;
5543         }
5544 }
5545
5546 /**
5547  * Return the number of local (alias free) variables used by a function.
5548  */
5549 static int get_function_n_local_vars(entity_t *entity)
5550 {
5551         const function_t *function = &entity->function;
5552         int count = 0;
5553
5554         /* count parameters */
5555         count += count_local_variables(function->parameters.entities, NULL);
5556
5557         /* count local variables declared in body */
5558         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5559         return count;
5560 }
5561
5562 /**
5563  * Build Firm code for the parameters of a function.
5564  */
5565 static void initialize_function_parameters(entity_t *entity)
5566 {
5567         assert(entity->kind == ENTITY_FUNCTION);
5568         ir_graph *irg             = current_ir_graph;
5569         ir_node  *args            = get_irg_args(irg);
5570         ir_node  *start_block     = get_irg_start_block(irg);
5571         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5572         int      first_param_nr   = 0;
5573
5574         if (entity->function.need_closure) {
5575                 /* add an extra parameter for the static link */
5576                 entity->function.static_link = new_r_Proj(irg, start_block, args, mode_P_data, 0);
5577                 ++first_param_nr;
5578         }
5579
5580         int       n         = 0;
5581         entity_t *parameter = entity->function.parameters.entities;
5582         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5583                 if (parameter->kind != ENTITY_PARAMETER)
5584                         continue;
5585
5586                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5587                 type_t *type = skip_typeref(parameter->declaration.type);
5588
5589                 bool needs_entity = parameter->parameter.address_taken;
5590                 assert(!is_type_array(type));
5591                 if (is_type_compound(type)) {
5592                         needs_entity = true;
5593                 }
5594
5595                 if (needs_entity) {
5596                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5597                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5598                         set_entity_ident(entity, id);
5599
5600                         parameter->declaration.kind
5601                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5602                         parameter->parameter.v.entity = entity;
5603                         continue;
5604                 }
5605
5606                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5607                 ir_mode *param_mode   = get_type_mode(param_irtype);
5608
5609                 long     pn    = n + first_param_nr;
5610                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5611
5612                 ir_mode *mode = get_ir_mode_storage(type);
5613                 value = create_conv(NULL, value, mode);
5614                 value = do_strict_conv(NULL, value);
5615
5616                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5617                 parameter->parameter.v.value_number = next_value_number_function;
5618                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5619                                         parameter);
5620                 ++next_value_number_function;
5621
5622                 set_value(parameter->parameter.v.value_number, value);
5623         }
5624 }
5625
5626 /**
5627  * Handle additional decl modifiers for IR-graphs
5628  *
5629  * @param irg            the IR-graph
5630  * @param dec_modifiers  additional modifiers
5631  */
5632 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5633                                      decl_modifiers_t decl_modifiers)
5634 {
5635         if (decl_modifiers & DM_RETURNS_TWICE) {
5636                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5637                 set_irg_additional_property(irg, mtp_property_returns_twice);
5638         }
5639         if (decl_modifiers & DM_NORETURN) {
5640                 /* TRUE if the declaration includes the Microsoft
5641                    __declspec(noreturn) specifier. */
5642                 set_irg_additional_property(irg, mtp_property_noreturn);
5643         }
5644         if (decl_modifiers & DM_NOTHROW) {
5645                 /* TRUE if the declaration includes the Microsoft
5646                    __declspec(nothrow) specifier. */
5647                 set_irg_additional_property(irg, mtp_property_nothrow);
5648         }
5649         if (decl_modifiers & DM_NAKED) {
5650                 /* TRUE if the declaration includes the Microsoft
5651                    __declspec(naked) specifier. */
5652                 set_irg_additional_property(irg, mtp_property_naked);
5653         }
5654         if (decl_modifiers & DM_FORCEINLINE) {
5655                 /* TRUE if the declaration includes the
5656                    Microsoft __forceinline specifier. */
5657                 set_irg_inline_property(irg, irg_inline_forced);
5658         }
5659         if (decl_modifiers & DM_NOINLINE) {
5660                 /* TRUE if the declaration includes the Microsoft
5661                    __declspec(noinline) specifier. */
5662                 set_irg_inline_property(irg, irg_inline_forbidden);
5663         }
5664 }
5665
5666 static void add_function_pointer(ir_type *segment, ir_entity *method,
5667                                  const char *unique_template)
5668 {
5669         ir_type   *method_type  = get_entity_type(method);
5670         ident     *id           = id_unique(unique_template);
5671         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5672
5673         ident     *ide          = id_unique(unique_template);
5674         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5675         ir_graph  *irg          = get_const_code_irg();
5676         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5677                                                            method, NULL);
5678
5679         set_entity_compiler_generated(ptr, 1);
5680         set_entity_variability(ptr, variability_constant);
5681         set_atomic_ent_value(ptr, val);
5682 }
5683
5684 /**
5685  * Generate possible IJmp branches to a given label block.
5686  */
5687 static void gen_ijmp_branches(ir_node *block)
5688 {
5689         ir_node *ijmp;
5690         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5691                 add_immBlock_pred(block, ijmp);
5692         }
5693 }
5694
5695 /**
5696  * Create code for a function and all inner functions.
5697  *
5698  * @param entity  the function entity
5699  */
5700 static void create_function(entity_t *entity)
5701 {
5702         assert(entity->kind == ENTITY_FUNCTION);
5703         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5704
5705         if (entity->function.statement == NULL)
5706                 return;
5707
5708         if (is_main(entity) && firm_opt.os_support == OS_SUPPORT_MINGW) {
5709                 prepare_main_collect2(entity);
5710         }
5711
5712         inner_functions     = NULL;
5713         current_trampolines = NULL;
5714
5715         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5716                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5717                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5718         }
5719         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5720                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5721                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5722         }
5723
5724         current_function_entity = entity;
5725         current_function_name   = NULL;
5726         current_funcsig         = NULL;
5727
5728         assert(all_labels == NULL);
5729         all_labels = NEW_ARR_F(label_t *, 0);
5730         ijmp_list  = NULL;
5731
5732         int       n_local_vars = get_function_n_local_vars(entity);
5733         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5734
5735         ir_graph *old_current_function = current_function;
5736         current_function = irg;
5737
5738         set_irg_fp_model(irg, firm_opt.fp_model);
5739         tarval_enable_fp_ops(1);
5740         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5741
5742         ir_node *first_block = get_cur_block();
5743
5744         /* set inline flags */
5745         if (entity->function.is_inline)
5746                 set_irg_inline_property(irg, irg_inline_recomended);
5747         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5748
5749         next_value_number_function = 0;
5750         initialize_function_parameters(entity);
5751         current_static_link = entity->function.static_link;
5752
5753         statement_to_firm(entity->function.statement);
5754
5755         ir_node *end_block = get_irg_end_block(irg);
5756
5757         /* do we have a return statement yet? */
5758         if (get_cur_block() != NULL) {
5759                 type_t *type = skip_typeref(entity->declaration.type);
5760                 assert(is_type_function(type));
5761                 const function_type_t *func_type   = &type->function;
5762                 const type_t          *return_type
5763                         = skip_typeref(func_type->return_type);
5764
5765                 ir_node *ret;
5766                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5767                         ret = new_Return(get_store(), 0, NULL);
5768                 } else {
5769                         ir_mode *mode;
5770                         if (is_type_scalar(return_type)) {
5771                                 mode = get_ir_mode_storage(func_type->return_type);
5772                         } else {
5773                                 mode = mode_P_data;
5774                         }
5775
5776                         ir_node *in[1];
5777                         /* §5.1.2.2.3 main implicitly returns 0 */
5778                         if (is_main(entity)) {
5779                                 in[0] = new_Const(get_mode_null(mode));
5780                         } else {
5781                                 in[0] = new_Unknown(mode);
5782                         }
5783                         ret = new_Return(get_store(), 1, in);
5784                 }
5785                 add_immBlock_pred(end_block, ret);
5786         }
5787
5788         bool has_computed_gotos = false;
5789         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5790                 label_t *label = all_labels[i];
5791                 if (label->address_taken) {
5792                         gen_ijmp_branches(label->block);
5793                         has_computed_gotos = true;
5794                 }
5795                 mature_immBlock(label->block);
5796         }
5797         if (has_computed_gotos) {
5798                 /* if we have computed goto's in the function, we cannot inline it */
5799                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5800                         warningf(&entity->base.source_position,
5801                                  "function '%Y' can never be inlined because it contains a computed goto",
5802                                  entity->base.symbol);
5803                 }
5804                 set_irg_inline_property(irg, irg_inline_forbidden);
5805         }
5806
5807         DEL_ARR_F(all_labels);
5808         all_labels = NULL;
5809
5810         mature_immBlock(first_block);
5811         mature_immBlock(end_block);
5812
5813         irg_finalize_cons(irg);
5814
5815         /* finalize the frame type */
5816         ir_type *frame_type = get_irg_frame_type(irg);
5817         int      n          = get_compound_n_members(frame_type);
5818         int      align_all  = 4;
5819         int      offset     = 0;
5820         for (int i = 0; i < n; ++i) {
5821                 ir_entity *entity      = get_compound_member(frame_type, i);
5822                 ir_type   *entity_type = get_entity_type(entity);
5823
5824                 int align = get_type_alignment_bytes(entity_type);
5825                 if (align > align_all)
5826                         align_all = align;
5827                 int misalign = 0;
5828                 if (align > 0) {
5829                         misalign  = offset % align;
5830                         if (misalign > 0) {
5831                                 offset += align - misalign;
5832                         }
5833                 }
5834
5835                 set_entity_offset(entity, offset);
5836                 offset += get_type_size_bytes(entity_type);
5837         }
5838         set_type_size_bytes(frame_type, offset);
5839         set_type_alignment_bytes(frame_type, align_all);
5840
5841         irg_vrfy(irg);
5842         current_function = old_current_function;
5843
5844         if (current_trampolines != NULL) {
5845                 DEL_ARR_F(current_trampolines);
5846                 current_trampolines = NULL;
5847         }
5848
5849         /* create inner functions if any */
5850         entity_t **inner = inner_functions;
5851         if (inner != NULL) {
5852                 ir_type *rem_outer_frame      = current_outer_frame;
5853                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5854                 ir_type *rem_outer_value_type = current_outer_value_type;
5855                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5856                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5857                         create_function(inner[i]);
5858                 }
5859                 DEL_ARR_F(inner);
5860
5861                 current_outer_value_type = rem_outer_value_type;
5862                 current_outer_frame      = rem_outer_frame;
5863         }
5864 }
5865
5866 static void scope_to_firm(scope_t *scope)
5867 {
5868         /* first pass: create declarations */
5869         entity_t *entity = scope->entities;
5870         for ( ; entity != NULL; entity = entity->base.next) {
5871                 if (entity->base.symbol == NULL)
5872                         continue;
5873
5874                 if (entity->kind == ENTITY_FUNCTION) {
5875                         if (entity->function.btk != bk_none) {
5876                                 /* builtins have no representation */
5877                                 continue;
5878                         }
5879                         (void)get_function_entity(entity, NULL);
5880                 } else if (entity->kind == ENTITY_VARIABLE) {
5881                         create_global_variable(entity);
5882                 }
5883         }
5884
5885         /* second pass: create code/initializers */
5886         entity = scope->entities;
5887         for ( ; entity != NULL; entity = entity->base.next) {
5888                 if (entity->base.symbol == NULL)
5889                         continue;
5890
5891                 if (entity->kind == ENTITY_FUNCTION) {
5892                         if (entity->function.btk != bk_none) {
5893                                 /* builtins have no representation */
5894                                 continue;
5895                         }
5896                         create_function(entity);
5897                 } else if (entity->kind == ENTITY_VARIABLE) {
5898                         assert(entity->declaration.kind
5899                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5900                         current_ir_graph = get_const_code_irg();
5901                         create_variable_initializer(entity);
5902                 }
5903         }
5904 }
5905
5906 void init_ast2firm(void)
5907 {
5908         obstack_init(&asm_obst);
5909         init_atomic_modes();
5910
5911         /* OS option must be set to the backend */
5912         switch (firm_opt.os_support) {
5913         case OS_SUPPORT_MINGW:
5914                 create_ld_ident = create_name_win32;
5915                 break;
5916         case OS_SUPPORT_LINUX:
5917                 create_ld_ident = create_name_linux_elf;
5918                 break;
5919         case OS_SUPPORT_MACHO:
5920                 create_ld_ident = create_name_macho;
5921                 break;
5922         default:
5923                 panic("unexpected OS support mode");
5924         }
5925
5926         /* create idents for all known runtime functions */
5927         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5928                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5929         }
5930
5931         entitymap_init(&entitymap);
5932 }
5933
5934 static void init_ir_types(void)
5935 {
5936         static int ir_types_initialized = 0;
5937         if (ir_types_initialized)
5938                 return;
5939         ir_types_initialized = 1;
5940
5941         ir_type_int        = get_ir_type(type_int);
5942         ir_type_char       = get_ir_type(type_char);
5943         ir_type_const_char = get_ir_type(type_const_char);
5944         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5945         ir_type_void       = get_ir_type(type_void);
5946
5947         be_params             = be_get_backend_param();
5948         mode_float_arithmetic = be_params->mode_float_arithmetic;
5949
5950         stack_param_align     = be_params->stack_param_align;
5951 }
5952
5953 void exit_ast2firm(void)
5954 {
5955         entitymap_destroy(&entitymap);
5956         obstack_free(&asm_obst, NULL);
5957 }
5958
5959 static void global_asm_to_firm(statement_t *s)
5960 {
5961         for (; s != NULL; s = s->base.next) {
5962                 assert(s->kind == STATEMENT_ASM);
5963
5964                 char const *const text = s->asms.asm_text.begin;
5965                 size_t            size = s->asms.asm_text.size;
5966
5967                 /* skip the last \0 */
5968                 if (text[size - 1] == '\0')
5969                         --size;
5970
5971                 ident *const id = new_id_from_chars(text, size);
5972                 add_irp_asm(id);
5973         }
5974 }
5975
5976 void translation_unit_to_firm(translation_unit_t *unit)
5977 {
5978         /* just to be sure */
5979         continue_label           = NULL;
5980         break_label              = NULL;
5981         current_switch_cond      = NULL;
5982         current_translation_unit = unit;
5983
5984         init_ir_types();
5985
5986         scope_to_firm(&unit->scope);
5987         global_asm_to_firm(unit->global_asm);
5988
5989         current_ir_graph         = NULL;
5990         current_translation_unit = NULL;
5991 }