nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 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
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "walk_statements.h"
  43 #include "warning.h"
  44 #include "entitymap_t.h"
  45 #include "driver/firm_opt.h"
  46 #include "driver/firm_cmdline.h"
  47
  48 /* some idents needed for name mangling */
  49 static ident *id_underscore;
  50 static ident *id_imp;
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int             next_value_number_function;
  58 static ir_node        *continue_label;
  59 static ir_node        *break_label;
  60 static ir_node        *current_switch_cond;
  61 static bool            saw_default_label;
  62 static declaration_t **all_labels;
  63 static declaration_t **inner_functions;
  64 static int             inner_function_idx;
  65 static ir_node        *ijmp_list;
  66 static bool            constant_folding;
  67
  68 extern bool            have_const_functions;
  69
  70 static const declaration_t *current_function_decl;
  71 static ir_node             *current_function_name;
  72 static ir_node             *current_funcsig;
  73 static switch_statement_t  *current_switch;
  74 static ir_graph            *current_function;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_FUNCTION,
  83         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  84         DECLARATION_KIND_GLOBAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE,
  86         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  87         DECLARATION_KIND_COMPOUND_MEMBER,
  88         DECLARATION_KIND_LABEL_BLOCK,
  89         DECLARATION_KIND_ENUM_ENTRY,
  90         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  91         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  92         DECLARATION_KIND_TYPE,
  93         DECLARATION_KIND_INNER_FUNCTION
  94 } declaration_kind_t;
  95
  96 static ir_type *get_ir_type(type_t *type);
  97 static ir_type *get_ir_type_incomplete(type_t *type);
  98
  99 static void enqueue_inner_function(declaration_t *declaration) {
 100         if (inner_functions == NULL) {
 101                 inner_functions = NEW_ARR_F(declaration_t *, 16);
 102                 inner_functions[0] = declaration;
 103                 inner_function_idx = 1;
 104         } else {
 105                 int size = ARR_LEN(inner_functions);
 106                 if (inner_function_idx >= size) {
 107                         ARR_RESIZE(declaration_t *, inner_functions, size + 16);
 108                 }
 109                 inner_functions[inner_function_idx++] = declaration;
 110         }
 111 }
 112
 113 static declaration_t *next_inner_function(void) {
 114         if (inner_function_idx == 0)
 115                 return 0;
 116         return inner_functions[--inner_function_idx];
 117 }
 118
 119 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 120 {
 121         const declaration_t *declaration = get_irg_loc_description(irg, pos);
 122
 123         if (declaration != NULL) {
 124                 warningf(&declaration->source_position,
 125                          "variable '%#T' might be used uninitialized",
 126                          declaration->type, declaration->symbol);
 127         }
 128         return new_r_Unknown(irg, mode);
 129 }
 130
 131 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 132 {
 133         const source_position_t *pos = (const source_position_t*) dbg;
 134         if (pos == NULL)
 135                 return 0;
 136         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 137                                    pos->linenr);
 138 }
 139
 140 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 141 {
 142         const source_position_t *pos = (const source_position_t*) dbg;
 143         if (pos == NULL)
 144                 return NULL;
 145         if (line != NULL)
 146                 *line = pos->linenr;
 147         return pos->input_name;
 148 }
 149
 150 static dbg_info *get_dbg_info(const source_position_t *pos)
 151 {
 152         return (dbg_info*) pos;
 153 }
 154
 155 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 156
 157 static ir_mode *mode_int, *mode_uint;
 158
 159 static ir_node *_expression_to_firm(const expression_t *expression);
 160 static ir_node *expression_to_firm(const expression_t *expression);
 161 static inline ir_mode *get_ir_mode(type_t *type);
 162 static void create_local_declaration(declaration_t *declaration);
 163
 164 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 165 {
 166         unsigned flags = get_atomic_type_flags(kind);
 167         unsigned size  = get_atomic_type_size(kind);
 168         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 169                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 170                 char            name[64];
 171                 ir_mode_sort    sort;
 172                 unsigned        bit_size     = size * 8;
 173                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 174                 ir_mode_arithmetic arithmetic;
 175                 unsigned        modulo_shift;
 176
 177                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 178                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 179                         snprintf(name, sizeof(name), "i%s%u", is_signed ? "" : "u", bit_size);
 180                         sort         = irms_int_number;
 181                         arithmetic   = irma_twos_complement;
 182                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 183                 } else {
 184                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 185                         snprintf(name, sizeof(name), "f%u", bit_size);
 186                         sort         = irms_float_number;
 187                         arithmetic   = irma_ieee754;
 188                         modulo_shift = 0;
 189                 }
 190                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 191                                    modulo_shift);
 192         }
 193
 194         return NULL;
 195 }
 196
 197 /**
 198  * Initialises the atomic modes depending on the machine size.
 199  */
 200 static void init_atomic_modes(void)
 201 {
 202         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 203                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 204         }
 205         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 206         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 207
 208         /* there's no real void type in firm */
 209         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 210
 211         /* initialize pointer modes */
 212         char            name[64];
 213         ir_mode_sort    sort         = irms_reference;
 214         unsigned        bit_size     = machine_size;
 215         bool            is_signed    = 0;
 216         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 217         unsigned        modulo_shift
 218                 = bit_size < machine_size ? machine_size : bit_size;
 219
 220         snprintf(name, sizeof(name), "p%u", machine_size);
 221         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 222                                         modulo_shift);
 223
 224         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 225         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 226
 227         /* Hmm, pointers should be machine size */
 228         set_modeP_data(ptr_mode);
 229         set_modeP_code(ptr_mode);
 230 }
 231
 232 static unsigned get_compound_type_size(compound_type_t *type)
 233 {
 234         ir_type *irtype = get_ir_type((type_t*) type);
 235         return get_type_size_bytes(irtype);
 236 }
 237
 238 static unsigned get_array_type_size(array_type_t *type)
 239 {
 240         assert(!type->is_vla);
 241         ir_type *irtype = get_ir_type((type_t*) type);
 242         return get_type_size_bytes(irtype);
 243 }
 244
 245
 246 static unsigned get_type_size_const(type_t *type)
 247 {
 248         switch(type->kind) {
 249         case TYPE_ERROR:
 250                 panic("error type occurred");
 251         case TYPE_ATOMIC:
 252                 return get_atomic_type_size(type->atomic.akind);
 253         case TYPE_COMPLEX:
 254                 return 2 * get_atomic_type_size(type->complex.akind);
 255         case TYPE_IMAGINARY:
 256                 return get_atomic_type_size(type->imaginary.akind);
 257         case TYPE_ENUM:
 258                 return get_mode_size_bytes(mode_int);
 259         case TYPE_COMPOUND_UNION:
 260         case TYPE_COMPOUND_STRUCT:
 261                 return get_compound_type_size(&type->compound);
 262         case TYPE_FUNCTION:
 263                 /* just a pointer to the function */
 264                 return get_mode_size_bytes(mode_P_code);
 265         case TYPE_POINTER:
 266                 return get_mode_size_bytes(mode_P_data);
 267         case TYPE_ARRAY:
 268                 return get_array_type_size(&type->array);
 269         case TYPE_BUILTIN:
 270                 return get_type_size_const(type->builtin.real_type);
 271         case TYPE_BITFIELD:
 272                 panic("type size of bitfield request");
 273         case TYPE_TYPEDEF:
 274         case TYPE_TYPEOF:
 275         case TYPE_INVALID:
 276                 break;
 277         }
 278         panic("Trying to determine size of invalid type");
 279 }
 280
 281 static ir_node *get_type_size(type_t *type)
 282 {
 283         type = skip_typeref(type);
 284
 285         if (is_type_array(type) && type->array.is_vla) {
 286                 ir_node *size_node = type->array.size_node;
 287                 if (size_node == NULL) {
 288                         size_node = expression_to_firm(type->array.size_expression);
 289                         assert(!is_Const(size_node));
 290                         type->array.size_node = size_node;
 291                 }
 292
 293                 ir_node *elem_size = get_type_size(type->array.element_type);
 294                 ir_mode *mode      = get_irn_mode(size_node);
 295                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 296                 return real_size;
 297         }
 298
 299         ir_mode *mode = get_ir_mode(type_size_t);
 300         symconst_symbol sym;
 301         sym.type_p = get_ir_type(type);
 302         return new_SymConst(mode, sym, symconst_type_size);
 303 }
 304
 305 static unsigned count_parameters(const function_type_t *function_type)
 306 {
 307         unsigned count = 0;
 308
 309         function_parameter_t *parameter = function_type->parameters;
 310         for ( ; parameter != NULL; parameter = parameter->next) {
 311                 ++count;
 312         }
 313
 314         return count;
 315 }
 316
 317 /**
 318  * Creates a Firm type for an atomic type
 319  */
 320 static ir_type *create_atomic_type(const atomic_type_t *type)
 321 {
 322         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 323         atomic_type_kind_t  kind      = type->akind;
 324         ir_mode            *mode      = _atomic_modes[kind];
 325         ident              *id        = get_mode_ident(mode);
 326         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 327
 328         set_type_alignment_bytes(irtype, type->base.alignment);
 329
 330         return irtype;
 331 }
 332
 333 /**
 334  * Creates a Firm type for a complex type
 335  */
 336 static ir_type *create_complex_type(const complex_type_t *type)
 337 {
 338         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 339         atomic_type_kind_t  kind      = type->akind;
 340         ir_mode            *mode      = _atomic_modes[kind];
 341         ident              *id        = get_mode_ident(mode);
 342
 343         (void) id;
 344         (void) dbgi;
 345
 346         /* FIXME: finish the array */
 347         return NULL;
 348 }
 349
 350 /**
 351  * Creates a Firm type for an imaginary type
 352  */
 353 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 354 {
 355         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 356         atomic_type_kind_t  kind      = type->akind;
 357         ir_mode            *mode      = _atomic_modes[kind];
 358         ident              *id        = get_mode_ident(mode);
 359         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 360
 361         set_type_alignment_bytes(irtype, type->base.alignment);
 362
 363         return irtype;
 364 }
 365
 366 /**
 367  * return type of a parameter (and take transparent union gnu extension into
 368  * account)
 369  */
 370 static type_t *get_parameter_type(type_t *type)
 371 {
 372         type = skip_typeref(type);
 373         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 374                 declaration_t *decl = type->compound.declaration;
 375                 type                = decl->scope.declarations->type;
 376         }
 377
 378         return type;
 379 }
 380
 381 static ir_type *create_method_type(const function_type_t *function_type)
 382 {
 383         type_t  *return_type  = function_type->return_type;
 384
 385         ident   *id           = id_unique("functiontype.%u");
 386         int      n_parameters = count_parameters(function_type);
 387         int      n_results    = return_type == type_void ? 0 : 1;
 388         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 389         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 390
 391         if (return_type != type_void) {
 392                 ir_type *restype = get_ir_type(return_type);
 393                 set_method_res_type(irtype, 0, restype);
 394         }
 395
 396         function_parameter_t *parameter = function_type->parameters;
 397         int                   n         = 0;
 398         for ( ; parameter != NULL; parameter = parameter->next) {
 399                 type_t  *type     = get_parameter_type(parameter->type);
 400                 ir_type *p_irtype = get_ir_type(type);
 401                 set_method_param_type(irtype, n, p_irtype);
 402                 ++n;
 403         }
 404
 405         if (function_type->variadic || function_type->unspecified_parameters) {
 406                 set_method_variadicity(irtype, variadicity_variadic);
 407         }
 408
 409         unsigned cc = get_method_calling_convention(irtype);
 410         switch (function_type->calling_convention) {
 411         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 412         case CC_CDECL:
 413 is_cdecl:
 414                 set_method_calling_convention(irtype, SET_CDECL(cc));
 415                 break;
 416
 417         case CC_STDCALL:
 418                 if (function_type->variadic || function_type->unspecified_parameters)
 419                         goto is_cdecl;
 420
 421                 /* only non-variadic function can use stdcall, else use cdecl */
 422                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 423                 break;
 424
 425         case CC_FASTCALL:
 426                 if (function_type->variadic || function_type->unspecified_parameters)
 427                         goto is_cdecl;
 428                 /* only non-variadic function can use fastcall, else use cdecl */
 429                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 430                 break;
 431
 432         case CC_THISCALL:
 433                 /* Hmm, leave default, not accepted by the parser yet. */
 434                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 435                 break;
 436         }
 437         return irtype;
 438 }
 439
 440 static ir_type *create_pointer_type(pointer_type_t *type)
 441 {
 442         type_t   *points_to    = type->points_to;
 443         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 444         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 445         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 446                                                     ir_points_to, mode_P_data, dbgi);
 447
 448         return ir_type;
 449 }
 450
 451 static ir_type *create_array_type(array_type_t *type)
 452 {
 453         type_t  *element_type    = type->element_type;
 454         ir_type *ir_element_type = get_ir_type(element_type);
 455
 456         ident    *id      = id_unique("array.%u");
 457         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 458         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 459
 460         const int align = get_type_alignment_bytes(ir_element_type);
 461         set_type_alignment_bytes(ir_type, align);
 462
 463         if (type->size_constant) {
 464                 int n_elements = type->size;
 465
 466                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 467
 468                 size_t elemsize = get_type_size_bytes(ir_element_type);
 469                 if (elemsize % align > 0) {
 470                         elemsize += align - (elemsize % align);
 471                 }
 472                 set_type_size_bytes(ir_type, n_elements * elemsize);
 473         } else {
 474                 set_array_lower_bound_int(ir_type, 0, 0);
 475         }
 476         set_type_state(ir_type, layout_fixed);
 477
 478         return ir_type;
 479 }
 480
 481 /**
 482  * Return the signed integer type of size bits.
 483  *
 484  * @param size   the size
 485  */
 486 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 487                                                  unsigned size)
 488 {
 489         static ir_mode *s_modes[64 + 1] = {NULL, };
 490         ir_type *res;
 491         ir_mode *mode;
 492
 493         if (size <= 0 || size > 64)
 494                 return NULL;
 495
 496         mode = s_modes[size];
 497         if (mode == NULL) {
 498                 char name[32];
 499
 500                 snprintf(name, sizeof(name), "bf_I%u", size);
 501                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 502                                    size <= 32 ? 32 : size );
 503                 s_modes[size] = mode;
 504         }
 505
 506         char name[32];
 507         snprintf(name, sizeof(name), "I%u", size);
 508         ident *id = new_id_from_str(name);
 509         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 510         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 511         set_primitive_base_type(res, base_tp);
 512
 513         return res;
 514 }
 515
 516 /**
 517  * Return the unsigned integer type of size bits.
 518  *
 519  * @param size   the size
 520  */
 521 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 522                                                    unsigned size)
 523 {
 524         static ir_mode *u_modes[64 + 1] = {NULL, };
 525         ir_type *res;
 526         ir_mode *mode;
 527
 528         if (size <= 0 || size > 64)
 529                 return NULL;
 530
 531         mode = u_modes[size];
 532         if (mode == NULL) {
 533                 char name[32];
 534
 535                 snprintf(name, sizeof(name), "bf_U%u", size);
 536                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 537                                    size <= 32 ? 32 : size );
 538                 u_modes[size] = mode;
 539         }
 540
 541         char name[32];
 542
 543         snprintf(name, sizeof(name), "U%u", size);
 544         ident *id = new_id_from_str(name);
 545         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 546         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 547         set_primitive_base_type(res, base_tp);
 548
 549         return res;
 550 }
 551
 552 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 553 {
 554         type_t *base = skip_typeref(type->base_type);
 555         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 556         ir_type *irbase = get_ir_type(base);
 557
 558         unsigned size = type->bit_size;
 559
 560         assert(!is_type_float(base));
 561         if (is_type_signed(base)) {
 562                 return get_signed_int_type_for_bit_size(irbase, size);
 563         } else {
 564                 return get_unsigned_int_type_for_bit_size(irbase, size);
 565         }
 566 }
 567
 568 #define INVALID_TYPE ((ir_type_ptr)-1)
 569
 570 enum {
 571         COMPOUND_IS_STRUCT = false,
 572         COMPOUND_IS_UNION  = true
 573 };
 574
 575 /**
 576  * Construct firm type from ast struct type.
 577  *
 578  * As anonymous inner structs get flattened to a single firm type, we might get
 579  * irtype, outer_offset and out_align passed (they represent the position of
 580  * the anonymous inner struct inside the resulting firm struct)
 581  */
 582 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 583                                      size_t *outer_offset, size_t *outer_align,
 584                                      bool incomplete, bool is_union)
 585 {
 586         declaration_t      *declaration = type->declaration;
 587         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 588
 589         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 590                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 591                                 && incomplete))
 592                 return declaration->v.irtype;
 593
 594         size_t align_all  = 1;
 595         size_t offset     = 0;
 596         size_t bit_offset = 0;
 597         size_t size       = 0;
 598
 599         if (irtype == NULL) {
 600                 symbol_t *symbol = declaration->symbol;
 601                 ident    *id;
 602                 if (symbol != NULL) {
 603                         id = new_id_from_str(symbol->string);
 604                 } else {
 605                         if (is_union) {
 606                                 id = id_unique("__anonymous_union.%u");
 607                         } else {
 608                                 id = id_unique("__anonymous_struct.%u");
 609                         }
 610                 }
 611                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 612
 613                 if (is_union) {
 614                         irtype = new_d_type_union(id, dbgi);
 615                 } else {
 616                         irtype = new_d_type_struct(id, dbgi);
 617                 }
 618
 619                 declaration->declaration_kind
 620                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 621                 declaration->v.irtype         = irtype;
 622                 //type->base.firm_type          = irtype;
 623         } else {
 624                 offset    = *outer_offset;
 625                 align_all = *outer_align;
 626         }
 627
 628         if (incomplete)
 629                 return irtype;
 630
 631         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 632
 633         declaration_t *entry = declaration->scope.declarations;
 634         for( ; entry != NULL; entry = entry->next) {
 635                 if (entry->namespc != NAMESPACE_NORMAL)
 636                         continue;
 637
 638                 size_t prev_offset = offset;
 639
 640                 symbol_t *symbol     = entry->symbol;
 641                 type_t   *entry_type = skip_typeref(entry->type);
 642                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 643
 644                 ident    *ident;
 645                 if (symbol != NULL) {
 646                         ident = new_id_from_str(symbol->string);
 647                 } else {
 648                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 649                                 create_compound_type(&entry_type->compound, irtype, &offset,
 650                                                      &align_all, false, COMPOUND_IS_STRUCT);
 651                                 goto finished_member;
 652                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 653                                 create_compound_type(&entry_type->compound, irtype, &offset,
 654                                                      &align_all, false, COMPOUND_IS_UNION);
 655                                 goto finished_member;
 656                         } else {
 657                                 assert(entry_type->kind == TYPE_BITFIELD);
 658                         }
 659                         ident = id_unique("anon.%u");
 660                 }
 661
 662                 ir_type *base_irtype;
 663                 if (entry_type->kind == TYPE_BITFIELD) {
 664                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 665                 } else {
 666                         base_irtype = get_ir_type(entry_type);
 667                 }
 668
 669                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 670                 size_t misalign        = offset % entry_alignment;
 671
 672                 ir_type   *entry_irtype = get_ir_type(entry_type);
 673                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 674
 675                 size_t base;
 676                 size_t bits_remainder;
 677                 if (entry_type->kind == TYPE_BITFIELD) {
 678                         size_t size_bits      = entry_type->bitfield.bit_size;
 679                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 680
 681                         if (size_bits > rest_size_bits) {
 682                                 /* start a new bucket */
 683                                 offset     += entry_alignment - misalign;
 684                                 bit_offset  = 0;
 685
 686                                 base           = offset;
 687                                 bits_remainder = 0;
 688                         } else {
 689                                 /* put into current bucket */
 690                                 base           = offset - misalign;
 691                                 bits_remainder = misalign * 8 + bit_offset;
 692                         }
 693
 694                         offset     += size_bits / 8;
 695                         bit_offset  = bit_offset + (size_bits % 8);
 696                 } else {
 697                         size_t entry_size = get_type_size_bytes(base_irtype);
 698                         if (misalign > 0 || bit_offset > 0)
 699                                 offset += entry_alignment - misalign;
 700
 701                         base           = offset;
 702                         bits_remainder = 0;
 703                         offset        += entry_size;
 704                         bit_offset     = 0;
 705                 }
 706
 707                 if (entry_alignment > align_all) {
 708                         if (entry_alignment % align_all != 0) {
 709                                 panic("uneven alignments not supported yet");
 710                         }
 711                         align_all = entry_alignment;
 712                 }
 713
 714                 set_entity_offset(entity, base);
 715                 set_entity_offset_bits_remainder(entity,
 716                                                  (unsigned char) bits_remainder);
 717                 //add_struct_member(irtype, entity);
 718                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 719                 assert(entry->v.entity == NULL);
 720                 entry->v.entity         = entity;
 721
 722 finished_member:
 723                 if (is_union) {
 724                         size_t entry_size = offset - prev_offset;
 725                         if (entry_size > size) {
 726                                 size = entry_size;
 727                         }
 728                         offset     = 0;
 729                         bit_offset = 0;
 730                 }
 731         }
 732
 733         if (!is_union) {
 734                 size = offset;
 735         }
 736
 737         size_t misalign = offset % align_all;
 738         if (misalign > 0 || bit_offset > 0) {
 739                 size += align_all - misalign;
 740         }
 741
 742         if (outer_offset != NULL) {
 743                 if (!is_union) {
 744                         *outer_offset = offset;
 745                 } else {
 746                         *outer_offset += size;
 747                 }
 748
 749                 if (align_all > *outer_align) {
 750                         if (align_all % *outer_align != 0) {
 751                                 panic("uneven alignments not supported yet");
 752                         }
 753                         *outer_align = align_all;
 754                 }
 755         } else {
 756                 set_type_alignment_bytes(irtype, align_all);
 757                 set_type_size_bytes(irtype, size);
 758                 set_type_state(irtype, layout_fixed);
 759         }
 760
 761         return irtype;
 762 }
 763
 764 static ir_type *create_enum_type(enum_type_t *const type)
 765 {
 766         type->base.firm_type = ir_type_int;
 767
 768         ir_mode *const mode    = mode_int;
 769         tarval  *const one     = get_mode_one(mode);
 770         tarval  *      tv_next = get_tarval_null(mode);
 771
 772         bool constant_folding_old = constant_folding;
 773         constant_folding = true;
 774
 775         declaration_t *declaration = type->declaration->next;
 776         for (; declaration != NULL; declaration = declaration->next) {
 777                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 778                         break;
 779
 780                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 781
 782                 expression_t *const init = declaration->init.enum_value;
 783                 if (init != NULL) {
 784                         ir_node *const cnst = expression_to_firm(init);
 785                         if (!is_Const(cnst)) {
 786                                 panic("couldn't fold constant");
 787                         }
 788                         tv_next = get_Const_tarval(cnst);
 789                 }
 790                 declaration->v.enum_val = tv_next;
 791                 tv_next = tarval_add(tv_next, one);
 792         }
 793
 794         constant_folding = constant_folding_old;
 795
 796         return ir_type_int;
 797 }
 798
 799 static ir_type *get_ir_type_incomplete(type_t *type)
 800 {
 801         assert(type != NULL);
 802         type = skip_typeref(type);
 803
 804         if (type->base.firm_type != NULL) {
 805                 assert(type->base.firm_type != INVALID_TYPE);
 806                 return type->base.firm_type;
 807         }
 808
 809         switch (type->kind) {
 810         case TYPE_COMPOUND_STRUCT:
 811                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 812                                             true, COMPOUND_IS_STRUCT);
 813         case TYPE_COMPOUND_UNION:
 814                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 815                                             true, COMPOUND_IS_UNION);
 816         default:
 817                 return get_ir_type(type);
 818         }
 819 }
 820
 821 static ir_type *get_ir_type(type_t *type)
 822 {
 823         assert(type != NULL);
 824
 825         type = skip_typeref(type);
 826
 827         if (type->base.firm_type != NULL) {
 828                 assert(type->base.firm_type != INVALID_TYPE);
 829                 return type->base.firm_type;
 830         }
 831
 832         ir_type *firm_type = NULL;
 833         switch (type->kind) {
 834         case TYPE_ERROR:
 835                 /* Happens while constant folding, when there was an error */
 836                 return create_atomic_type(&type_void->atomic);
 837
 838         case TYPE_ATOMIC:
 839                 firm_type = create_atomic_type(&type->atomic);
 840                 break;
 841         case TYPE_COMPLEX:
 842                 firm_type = create_complex_type(&type->complex);
 843                 break;
 844         case TYPE_IMAGINARY:
 845                 firm_type = create_imaginary_type(&type->imaginary);
 846                 break;
 847         case TYPE_FUNCTION:
 848                 firm_type = create_method_type(&type->function);
 849                 break;
 850         case TYPE_POINTER:
 851                 firm_type = create_pointer_type(&type->pointer);
 852                 break;
 853         case TYPE_ARRAY:
 854                 firm_type = create_array_type(&type->array);
 855                 break;
 856         case TYPE_COMPOUND_STRUCT:
 857                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 858                                                  false, COMPOUND_IS_STRUCT);
 859                 break;
 860         case TYPE_COMPOUND_UNION:
 861                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 862                                                  false, COMPOUND_IS_UNION);
 863                 break;
 864         case TYPE_ENUM:
 865                 firm_type = create_enum_type(&type->enumt);
 866                 break;
 867         case TYPE_BUILTIN:
 868                 firm_type = get_ir_type(type->builtin.real_type);
 869                 break;
 870         case TYPE_BITFIELD:
 871                 firm_type = create_bitfield_type(&type->bitfield);
 872                 break;
 873
 874         case TYPE_TYPEOF:
 875         case TYPE_TYPEDEF:
 876         case TYPE_INVALID:
 877                 break;
 878         }
 879         if (firm_type == NULL)
 880                 panic("unknown type found");
 881
 882         type->base.firm_type = firm_type;
 883         return firm_type;
 884 }
 885
 886 static inline ir_mode *get_ir_mode(type_t *type)
 887 {
 888         ir_type *irtype = get_ir_type(type);
 889
 890         /* firm doesn't report a mode for arrays somehow... */
 891         if (is_Array_type(irtype)) {
 892                 return mode_P_data;
 893         }
 894
 895         ir_mode *mode = get_type_mode(irtype);
 896         assert(mode != NULL);
 897         return mode;
 898 }
 899
 900 /** Names of the runtime functions. */
 901 static const struct {
 902         int        id;           /**< the rts id */
 903         int        n_res;        /**< number of return values */
 904         const char *name;        /**< the name of the rts function */
 905         int        n_params;     /**< number of parameters */
 906         unsigned   flags;        /**< language flags */
 907 } rts_data[] = {
 908         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 909         { rts_abort,      0, "abort",        0, _C89 },
 910         { rts_alloca,     1, "alloca",       1, _ALL },
 911         { rts_abs,        1, "abs",          1, _C89 },
 912         { rts_labs,       1, "labs",         1, _C89 },
 913         { rts_llabs,      1, "llabs",        1, _C99 },
 914         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 915
 916         { rts_fabs,       1, "fabs",         1, _C89 },
 917         { rts_sqrt,       1, "sqrt",         1, _C89 },
 918         { rts_cbrt,       1, "cbrt",         1, _C99 },
 919         { rts_exp,        1, "exp",          1, _C89 },
 920         { rts_exp2,       1, "exp2",         1, _C89 },
 921         { rts_exp10,      1, "exp10",        1, _GNUC },
 922         { rts_log,        1, "log",          1, _C89 },
 923         { rts_log2,       1, "log2",         1, _C89 },
 924         { rts_log10,      1, "log10",        1, _C89 },
 925         { rts_pow,        1, "pow",          2, _C89 },
 926         { rts_sin,        1, "sin",          1, _C89 },
 927         { rts_cos,        1, "cos",          1, _C89 },
 928         { rts_tan,        1, "tan",          1, _C89 },
 929         { rts_asin,       1, "asin",         1, _C89 },
 930         { rts_acos,       1, "acos",         1, _C89 },
 931         { rts_atan,       1, "atan",         1, _C89 },
 932         { rts_sinh,       1, "sinh",         1, _C89 },
 933         { rts_cosh,       1, "cosh",         1, _C89 },
 934         { rts_tanh,       1, "tanh",         1, _C89 },
 935
 936         { rts_fabsf,      1, "fabsf",        1, _C99 },
 937         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 938         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 939         { rts_expf,       1, "expf",         1, _C99 },
 940         { rts_exp2f,      1, "exp2f",        1, _C99 },
 941         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 942         { rts_logf,       1, "logf",         1, _C99 },
 943         { rts_log2f,      1, "log2f",        1, _C99 },
 944         { rts_log10f,     1, "log10f",       1, _C99 },
 945         { rts_powf,       1, "powf",         2, _C99 },
 946         { rts_sinf,       1, "sinf",         1, _C99 },
 947         { rts_cosf,       1, "cosf",         1, _C99 },
 948         { rts_tanf,       1, "tanf",         1, _C99 },
 949         { rts_asinf,      1, "asinf",        1, _C99 },
 950         { rts_acosf,      1, "acosf",        1, _C99 },
 951         { rts_atanf,      1, "atanf",        1, _C99 },
 952         { rts_sinhf,      1, "sinhf",        1, _C99 },
 953         { rts_coshf,      1, "coshf",        1, _C99 },
 954         { rts_tanhf,      1, "tanhf",        1, _C99 },
 955
 956         { rts_fabsl,      1, "fabsl",        1, _C99 },
 957         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 958         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 959         { rts_expl,       1, "expl",         1, _C99 },
 960         { rts_exp2l,      1, "exp2l",        1, _C99 },
 961         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 962         { rts_logl,       1, "logl",         1, _C99 },
 963         { rts_log2l,      1, "log2l",        1, _C99 },
 964         { rts_log10l,     1, "log10l",       1, _C99 },
 965         { rts_powl,       1, "powl",         2, _C99 },
 966         { rts_sinl,       1, "sinl",         1, _C99 },
 967         { rts_cosl,       1, "cosl",         1, _C99 },
 968         { rts_tanl,       1, "tanl",         1, _C99 },
 969         { rts_asinl,      1, "asinl",        1, _C99 },
 970         { rts_acosl,      1, "acosl",        1, _C99 },
 971         { rts_atanl,      1, "atanl",        1, _C99 },
 972         { rts_sinhl,      1, "sinhl",        1, _C99 },
 973         { rts_coshl,      1, "coshl",        1, _C99 },
 974         { rts_tanhl,      1, "tanhl",        1, _C99 },
 975
 976         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 977         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 978         { rts_strcmp,     1, "strcmp",       2, _C89 },
 979         { rts_strncmp,    1, "strncmp",      3, _C89 }
 980 };
 981
 982 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 983
 984 /**
 985  * Mangles an entity linker (ld) name for win32 usage.
 986  *
 987  * @param ent          the entity to be mangled
 988  * @param declaration  the declaration
 989  */
 990 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 991 {
 992         ident *id;
 993
 994         if (is_Method_type(get_entity_type(ent)))
 995                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 996         else {
 997                 /* always add an underscore in win32 */
 998                 id = mangle(id_underscore, get_entity_ident(ent));
 999         }
1000
1001         decl_modifiers_t decl_modifiers = declaration->modifiers;
1002         if (decl_modifiers & DM_DLLIMPORT) {
1003                 /* add prefix for imported symbols */
1004                 id = mangle(id_imp, id);
1005         }
1006         return id;
1007 }
1008
1009 /**
1010  * Mangles an entity linker (ld) name for Linux ELF usage.
1011  *
1012  * @param ent          the entity to be mangled
1013  * @param declaration  the declaration
1014  */
1015 static ident *create_ld_ident_linux_elf(ir_entity *entity,
1016                                         declaration_t *declaration)
1017 {
1018         (void) declaration;
1019         return get_entity_ident(entity);
1020 }
1021
1022 /**
1023  * Mangles an entity linker (ld) name for Mach-O usage.
1024  *
1025  * @param ent          the entity to be mangled
1026  * @param declaration  the declaration
1027  */
1028 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1029 {
1030         (void) declaration;
1031         ident *id = mangle(id_underscore, get_entity_ident(ent));
1032         return id;
1033 }
1034
1035 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1036                                        declaration_t *declaration);
1037 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1038
1039 /**
1040  * Handle GNU attributes for entities
1041  *
1042  * @param ent   the entity
1043  * @param decl  the routine declaration
1044  */
1045 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1046 {
1047         if (decl->modifiers & DM_PURE) {
1048                 /* TRUE if the declaration includes the GNU
1049                    __attribute__((pure)) specifier. */
1050                 set_entity_additional_property(ent, mtp_property_pure);
1051         }
1052         if (decl->modifiers & DM_CONST) {
1053                 set_entity_additional_property(ent, mtp_property_const);
1054                 have_const_functions = true;
1055         }
1056         if (decl->modifiers & DM_USED) {
1057                 /* TRUE if the declaration includes the GNU
1058                    __attribute__((used)) specifier. */
1059                 set_entity_stickyness(ent, stickyness_sticky);
1060         }
1061 }
1062
1063 /**
1064  * Creates an entity representing a function.
1065  *
1066  * @param declaration  the function declaration
1067  */
1068 static ir_entity *get_function_entity(declaration_t *declaration)
1069 {
1070         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION ||
1071             declaration->declaration_kind == DECLARATION_KIND_INNER_FUNCTION)
1072                 return declaration->v.entity;
1073         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1074
1075         symbol_t *symbol = declaration->symbol;
1076         ident    *id     = new_id_from_str(symbol->string);
1077
1078         ir_type  *global_type    = get_glob_type();
1079         ir_type  *ir_type_method = get_ir_type(declaration->type);
1080         assert(is_Method_type(ir_type_method));
1081
1082         /* already an entity defined? */
1083         ir_entity *entity = entitymap_get(&entitymap, symbol);
1084         if (entity != NULL) {
1085                 if (get_entity_visibility(entity) == visibility_external_allocated
1086                                 && declaration->init.statement != NULL) {
1087                         set_entity_visibility(entity, visibility_external_visible);
1088                 }
1089                 goto entity_created;
1090         }
1091
1092         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1093         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1094         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1095
1096         handle_gnu_attributes_ent(entity, declaration);
1097
1098         /* static inline             => local
1099          * extern inline             => local
1100          * inline without definition => local
1101          * inline with definition    => external_visible */
1102         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1103         bool                const is_inline     = declaration->is_inline;
1104         bool                const has_body      = declaration->init.statement != NULL;
1105         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1106                 set_entity_visibility(entity, visibility_external_visible);
1107         } else if (storage_class == STORAGE_CLASS_STATIC ||
1108                    (is_inline && has_body)) {
1109                 if (!has_body) {
1110                         /* this entity was declared, but is defined nowhere */
1111                         set_entity_peculiarity(entity, peculiarity_description);
1112                 }
1113                 set_entity_visibility(entity, visibility_local);
1114         } else if (has_body) {
1115                 set_entity_visibility(entity, visibility_external_visible);
1116         } else {
1117                 set_entity_visibility(entity, visibility_external_allocated);
1118         }
1119         set_entity_allocation(entity, allocation_static);
1120
1121         /* We should check for file scope here, but as long as we compile C only
1122            this is not needed. */
1123         if (! firm_opt.freestanding) {
1124                 /* check for a known runtime function */
1125                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1126                         if (id != rts_idents[i])
1127                                 continue;
1128
1129                         /* ignore those rts functions not necessary needed for current mode */
1130                         if ((c_mode & rts_data[i].flags) == 0)
1131                                 continue;
1132                         assert(rts_entities[rts_data[i].id] == NULL);
1133                         rts_entities[rts_data[i].id] = entity;
1134                 }
1135         }
1136
1137         entitymap_insert(&entitymap, symbol, entity);
1138
1139 entity_created:
1140         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1141         declaration->v.entity         = entity;
1142
1143         return entity;
1144 }
1145
1146 /**
1147  * Creates a Const node representing a constant.
1148  */
1149 static ir_node *const_to_firm(const const_expression_t *cnst)
1150 {
1151         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1152         ir_mode  *mode = get_ir_mode(cnst->base.type);
1153
1154         char    buf[128];
1155         tarval *tv;
1156         size_t  len;
1157         if (mode_is_float(mode)) {
1158                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1159         } else {
1160                 if (mode_is_signed(mode)) {
1161                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1162                 } else {
1163                         len = snprintf(buf, sizeof(buf), "%llu",
1164                                        (unsigned long long) cnst->v.int_value);
1165                 }
1166                 tv = new_tarval_from_str(buf, len, mode);
1167         }
1168
1169         return new_d_Const(dbgi, mode, tv);
1170 }
1171
1172 /**
1173  * Creates a Const node representing a character constant.
1174  */
1175 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1176 {
1177         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1178         ir_mode  *mode = get_ir_mode(cnst->base.type);
1179
1180         long long int v = 0;
1181         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1182                 if (char_is_signed) {
1183                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1184                 } else {
1185                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1186                 }
1187         }
1188         char    buf[128];
1189         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1190         tarval *tv = new_tarval_from_str(buf, len, mode);
1191
1192         return new_d_Const(dbgi, mode, tv);
1193 }
1194
1195 /**
1196  * Creates a Const node representing a wide character constant.
1197  */
1198 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1199 {
1200         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1201         ir_mode  *mode = get_ir_mode(cnst->base.type);
1202
1203         long long int v = cnst->v.wide_character.begin[0];
1204
1205         char    buf[128];
1206         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1207         tarval *tv = new_tarval_from_str(buf, len, mode);
1208
1209         return new_d_Const(dbgi, mode, tv);
1210 }
1211
1212 /**
1213  * Creates a SymConst for a given entity.
1214  *
1215  * @param dbgi    debug info
1216  * @param mode    the (reference) mode for the SymConst
1217  * @param entity  the entity
1218  */
1219 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1220                               ir_entity *entity)
1221 {
1222         assert(entity != NULL);
1223         union symconst_symbol sym;
1224         sym.entity_p = entity;
1225         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1226 }
1227
1228 /**
1229  * Creates a SymConst node representing a string constant.
1230  *
1231  * @param src_pos    the source position of the string constant
1232  * @param id_prefix  a prefix for the name of the generated string constant
1233  * @param value      the value of the string constant
1234  */
1235 static ir_node *string_to_firm(const source_position_t *const src_pos,
1236                                const char *const id_prefix,
1237                                const string_t *const value)
1238 {
1239         ir_type  *const global_type = get_glob_type();
1240         dbg_info *const dbgi        = get_dbg_info(src_pos);
1241         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1242                                                        ir_type_const_char, dbgi);
1243
1244         ident     *const id     = id_unique(id_prefix);
1245         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1246         set_entity_ld_ident(entity, id);
1247         set_entity_variability(entity, variability_constant);
1248         set_entity_allocation(entity, allocation_static);
1249
1250         ir_type *const elem_type = ir_type_const_char;
1251         ir_mode *const mode      = get_type_mode(elem_type);
1252
1253         const char* const string = value->begin;
1254         const size_t      slen   = value->size;
1255
1256         set_array_lower_bound_int(type, 0, 0);
1257         set_array_upper_bound_int(type, 0, slen);
1258         set_type_size_bytes(type, slen);
1259         set_type_state(type, layout_fixed);
1260
1261         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1262         for(size_t i = 0; i < slen; ++i) {
1263                 tvs[i] = new_tarval_from_long(string[i], mode);
1264         }
1265
1266         set_array_entity_values(entity, tvs, slen);
1267         free(tvs);
1268
1269         return create_symconst(dbgi, mode_P_data, entity);
1270 }
1271
1272 /**
1273  * Creates a SymConst node representing a string literal.
1274  *
1275  * @param literal   the string literal
1276  */
1277 static ir_node *string_literal_to_firm(
1278                 const string_literal_expression_t* literal)
1279 {
1280         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1281                               &literal->value);
1282 }
1283
1284 /**
1285  * Creates a SymConst node representing a wide string literal.
1286  *
1287  * @param literal   the wide string literal
1288  */
1289 static ir_node *wide_string_literal_to_firm(
1290         const wide_string_literal_expression_t* const literal)
1291 {
1292         ir_type *const global_type = get_glob_type();
1293         ir_type *const elem_type   = ir_type_wchar_t;
1294         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1295         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1296                                                     elem_type, dbgi);
1297
1298         ident     *const id     = id_unique("Lstr.%u");
1299         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1300         set_entity_ld_ident(entity, id);
1301         set_entity_variability(entity, variability_constant);
1302         set_entity_allocation(entity, allocation_static);
1303
1304         ir_mode *const mode      = get_type_mode(elem_type);
1305
1306         const wchar_rep_t *const string = literal->value.begin;
1307         const size_t             slen   = literal->value.size;
1308
1309         set_array_lower_bound_int(type, 0, 0);
1310         set_array_upper_bound_int(type, 0, slen);
1311         set_type_size_bytes(type, slen);
1312         set_type_state(type, layout_fixed);
1313
1314         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1315         for(size_t i = 0; i < slen; ++i) {
1316                 tvs[i] = new_tarval_from_long(string[i], mode);
1317         }
1318
1319         set_array_entity_values(entity, tvs, slen);
1320         free(tvs);
1321
1322         return create_symconst(dbgi, mode_P_data, entity);
1323 }
1324
1325 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1326                                       ir_node *const addr)
1327 {
1328         ir_type *irtype = get_ir_type(type);
1329         if (is_compound_type(irtype)
1330                         || is_Method_type(irtype)
1331                         || is_Array_type(irtype)) {
1332                 return addr;
1333         }
1334
1335         ir_mode *const mode     = get_type_mode(irtype);
1336         ir_node *const memory   = get_store();
1337         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1338         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1339         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1340
1341         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1342                 set_Load_volatility(load, volatility_is_volatile);
1343         }
1344
1345         set_store(load_mem);
1346         return load_res;
1347 }
1348
1349 /**
1350  * Creates a strict Conv if neccessary.
1351  */
1352 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1353 {
1354         ir_mode *mode = get_irn_mode(node);
1355
1356         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1357                 return node;
1358         if (!mode_is_float(mode))
1359                 return node;
1360
1361         /* check if there is already a Conv */
1362         if (is_Conv(node)) {
1363                 /* convert it into a strict Conv */
1364                 set_Conv_strict(node, 1);
1365                 return node;
1366         }
1367
1368         /* otherwise create a new one */
1369         return new_d_strictConv(dbgi, node, mode);
1370 }
1371
1372 static ir_node *get_global_var_address(dbg_info *const dbgi,
1373                                        const declaration_t *const decl)
1374 {
1375         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1376
1377         ir_entity *const entity = decl->v.entity;
1378         switch ((storage_class_tag_t)decl->storage_class) {
1379                 case STORAGE_CLASS_THREAD:
1380                 case STORAGE_CLASS_THREAD_EXTERN:
1381                 case STORAGE_CLASS_THREAD_STATIC: {
1382                         ir_node *const no_mem = new_NoMem();
1383                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1384                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1385                 }
1386
1387                 default:
1388                         return create_symconst(dbgi, mode_P_data, entity);
1389         }
1390 }
1391
1392 /**
1393  * Returns the correct base address depending on whether it is a parameter or a
1394  * normal local variable.
1395  */
1396 static ir_node *get_local_frame(ir_entity *const ent)
1397 {
1398         ir_graph      *const irg   = current_ir_graph;
1399         const ir_type *const owner = get_entity_owner(ent);
1400         if (owner == get_irg_frame_type(irg)) {
1401                 return get_irg_frame(irg);
1402         } else {
1403                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1404                 return get_irg_value_param_base(irg);
1405         }
1406 }
1407
1408 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1409 {
1410         ir_mode *value_mode = get_irn_mode(value);
1411
1412         if (value_mode == dest_mode || is_Bad(value))
1413                 return value;
1414
1415         if (dest_mode == mode_b) {
1416                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1417                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1418                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1419                 return proj;
1420         }
1421
1422         return new_d_Conv(dbgi, value, dest_mode);
1423 }
1424
1425 /**
1426  * Keep all memory edges of the given block.
1427  */
1428 static void keep_all_memory(ir_node *block) {
1429         ir_node *old = get_cur_block();
1430
1431         set_cur_block(block);
1432         keep_alive(get_store());
1433         /* TODO: keep all memory edges from restricted pointers */
1434         set_cur_block(old);
1435 }
1436
1437 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1438 {
1439         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1440         declaration_t *declaration = ref->declaration;
1441         type_t        *type        = skip_typeref(declaration->type);
1442
1443         /* make sure the type is constructed */
1444         (void) get_ir_type(type);
1445
1446         switch ((declaration_kind_t)declaration->declaration_kind) {
1447         case DECLARATION_KIND_TYPE:
1448         case DECLARATION_KIND_UNKNOWN:
1449                 break;
1450
1451         case DECLARATION_KIND_ENUM_ENTRY: {
1452                 ir_mode *const mode = get_ir_mode(type);
1453                 return new_Const(mode, declaration->v.enum_val);
1454         }
1455
1456         case DECLARATION_KIND_LOCAL_VARIABLE: {
1457                 ir_mode *const mode = get_ir_mode(type);
1458                 return get_value(declaration->v.value_number, mode);
1459         }
1460         case DECLARATION_KIND_FUNCTION: {
1461                 ir_mode *const mode = get_ir_mode(type);
1462                 return create_symconst(dbgi, mode, declaration->v.entity);
1463         }
1464         case DECLARATION_KIND_INNER_FUNCTION: {
1465                 ir_mode *const mode = get_ir_mode(type);
1466                 if (! declaration->goto_to_outer && !declaration->need_closure) {
1467                         /* inner function not using the closure */
1468                         return create_symconst(dbgi, mode, declaration->v.entity);
1469                 } else {
1470                         /* TODO: need trampoline here */
1471                         panic("Trampoline code not implemented");
1472                         return create_symconst(dbgi, mode, declaration->v.entity);
1473                 }
1474         }
1475         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1476                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1477                 return deref_address(dbgi, declaration->type, addr);
1478         }
1479
1480         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1481                 ir_entity *entity = declaration->v.entity;
1482                 ir_node   *frame  = get_local_frame(entity);
1483                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1484                 return deref_address(dbgi, declaration->type, sel);
1485         }
1486
1487         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1488                 return declaration->v.vla_base;
1489
1490         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1491         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1492         case DECLARATION_KIND_COMPOUND_MEMBER:
1493         case DECLARATION_KIND_LABEL_BLOCK:
1494                 panic("not implemented reference type");
1495         }
1496
1497         panic("reference to declaration with unknown type found");
1498 }
1499
1500 static ir_node *reference_addr(const reference_expression_t *ref)
1501 {
1502         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1503         declaration_t *declaration = ref->declaration;
1504
1505         switch((declaration_kind_t) declaration->declaration_kind) {
1506         case DECLARATION_KIND_TYPE:
1507         case DECLARATION_KIND_UNKNOWN:
1508                 break;
1509         case DECLARATION_KIND_LOCAL_VARIABLE:
1510                 /* you can store to a local variable (so we don't panic but return NULL
1511                  * as an indicator for no real address) */
1512                 return NULL;
1513         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1514                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1515                 return addr;
1516         }
1517         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1518                 ir_entity *entity = declaration->v.entity;
1519                 ir_node   *frame  = get_local_frame(entity);
1520                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1521
1522                 return sel;
1523         }
1524
1525         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1526                 return declaration->v.vla_base;
1527
1528         case DECLARATION_KIND_ENUM_ENTRY:
1529                 panic("trying to reference enum entry");
1530
1531         case DECLARATION_KIND_FUNCTION: {
1532                 type_t  *const type = skip_typeref(declaration->type);
1533                 ir_mode *const mode = get_ir_mode(type);
1534                 return create_symconst(dbgi, mode, declaration->v.entity);
1535         }
1536
1537         case DECLARATION_KIND_INNER_FUNCTION:
1538         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1539         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1540         case DECLARATION_KIND_COMPOUND_MEMBER:
1541         case DECLARATION_KIND_LABEL_BLOCK:
1542                 panic("not implemented reference type");
1543         }
1544
1545         panic("reference to declaration with unknown type found");
1546 }
1547
1548 /**
1549  * Transform calls to builtin functions.
1550  */
1551 static ir_node *process_builtin_call(const call_expression_t *call)
1552 {
1553         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1554
1555         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1556         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1557
1558         type_t *type = skip_typeref(builtin->base.type);
1559         assert(is_type_pointer(type));
1560
1561         type_t   *function_type = skip_typeref(type->pointer.points_to);
1562         symbol_t *symbol        = builtin->symbol;
1563
1564         switch(symbol->ID) {
1565         case T___builtin_alloca: {
1566                 if (call->arguments == NULL || call->arguments->next != NULL) {
1567                         panic("invalid number of parameters on __builtin_alloca");
1568                 }
1569                 expression_t *argument = call->arguments->expression;
1570                 ir_node      *size     = expression_to_firm(argument);
1571
1572                 ir_node *store  = get_store();
1573                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1574                                               stack_alloc);
1575                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1576                 set_store(proj_m);
1577                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1578
1579                 return res;
1580         }
1581
1582         case T___builtin_huge_val:
1583         case T___builtin_inf:
1584         case T___builtin_inff:
1585         case T___builtin_infl: {
1586                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1587                 tarval  *tv   = get_mode_infinite(mode);
1588                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1589                 return   res;
1590         }
1591         case T___builtin_nan:
1592         case T___builtin_nanf:
1593         case T___builtin_nanl: {
1594                 /* Ignore string for now... */
1595                 assert(is_type_function(function_type));
1596                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1597                 tarval  *tv   = get_mode_NAN(mode);
1598                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1599                 return res;
1600         }
1601         case T___builtin_va_end:
1602                 return NULL;
1603         default:
1604                 panic("Unsupported builtin found\n");
1605         }
1606 }
1607
1608 /**
1609  * Transform a call expression.
1610  * Handles some special cases, like alloca() calls, which must be resolved
1611  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1612  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1613  * handled right...
1614  */
1615 static ir_node *call_expression_to_firm(const call_expression_t *call)
1616 {
1617         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1618         assert(get_cur_block() != NULL);
1619
1620         expression_t *function = call->function;
1621         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1622                 return process_builtin_call(call);
1623         }
1624         if (function->kind == EXPR_REFERENCE) {
1625                 const reference_expression_t *ref = &function->reference;
1626                 declaration_t *declaration = ref->declaration;
1627
1628                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1629                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1630                                 /* handle alloca() call */
1631                                 expression_t *argument = call->arguments->expression;
1632                                 ir_node      *size     = expression_to_firm(argument);
1633
1634                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1635
1636                                 ir_node  *store  = get_store();
1637                                 dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1638                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1639                                                                stack_alloc);
1640                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1641                                 set_store(proj_m);
1642                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1643
1644                                 return res;
1645                         }
1646                 }
1647         }
1648         ir_node *callee = expression_to_firm(function);
1649
1650         type_t *type = skip_typeref(function->base.type);
1651         assert(is_type_pointer(type));
1652         pointer_type_t *pointer_type = &type->pointer;
1653         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1654         assert(is_type_function(points_to));
1655         function_type_t *function_type = &points_to->function;
1656
1657         int      n_parameters = 0;
1658         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1659         ir_type *new_method_type = NULL;
1660         if (function_type->variadic || function_type->unspecified_parameters) {
1661                 const call_argument_t *argument = call->arguments;
1662                 for( ; argument != NULL; argument = argument->next) {
1663                         ++n_parameters;
1664                 }
1665
1666                 /* we need to construct a new method type matching the call
1667                  * arguments... */
1668                 int n_res       = get_method_n_ress(ir_method_type);
1669                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1670                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1671                                                     n_parameters, n_res, dbgi);
1672                 set_method_calling_convention(new_method_type,
1673                                get_method_calling_convention(ir_method_type));
1674                 set_method_additional_properties(new_method_type,
1675                                get_method_additional_properties(ir_method_type));
1676                 set_method_variadicity(new_method_type,
1677                                        get_method_variadicity(ir_method_type));
1678
1679                 for(int i = 0; i < n_res; ++i) {
1680                         set_method_res_type(new_method_type, i,
1681                                             get_method_res_type(ir_method_type, i));
1682                 }
1683                 argument = call->arguments;
1684                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1685                         expression_t *expression = argument->expression;
1686                         ir_type      *irtype     = get_ir_type(expression->base.type);
1687                         set_method_param_type(new_method_type, i, irtype);
1688                 }
1689                 ir_method_type = new_method_type;
1690         } else {
1691                 n_parameters = get_method_n_params(ir_method_type);
1692         }
1693
1694         ir_node *in[n_parameters];
1695
1696         const call_argument_t *argument = call->arguments;
1697         for(int n = 0; n < n_parameters; ++n) {
1698                 expression_t *expression = argument->expression;
1699                 ir_node      *arg_node   = expression_to_firm(expression);
1700
1701                 arg_node = do_strict_conv(dbgi, arg_node);
1702
1703                 in[n] = arg_node;
1704
1705                 argument = argument->next;
1706         }
1707
1708         ir_node  *store = get_store();
1709         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1710                                      ir_method_type);
1711         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1712         set_store(mem);
1713
1714         type_t  *return_type = skip_typeref(function_type->return_type);
1715         ir_node *result      = NULL;
1716
1717         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1718                 ir_mode *mode;
1719                 if (is_type_scalar(return_type)) {
1720                         mode = get_ir_mode(return_type);
1721                 } else {
1722                         mode = mode_P_data;
1723                 }
1724                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1725                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1726         }
1727
1728         if (function->kind == EXPR_REFERENCE &&
1729             function->reference.declaration->modifiers & DM_NORETURN) {
1730                 /* A dead end:  Keep the Call and the Block.  Also place all further
1731                  * nodes into a new and unreachable block. */
1732                 keep_alive(node);
1733                 keep_alive(get_cur_block());
1734                 new_Block(0, NULL);
1735         }
1736
1737         return result;
1738 }
1739
1740 static void statement_to_firm(statement_t *statement);
1741 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1742
1743 static ir_node *expression_to_addr(const expression_t *expression);
1744 static ir_node *create_condition_evaluation(const expression_t *expression,
1745                                             ir_node *true_block,
1746                                             ir_node *false_block);
1747
1748 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1749                          ir_node *value)
1750 {
1751         value = do_strict_conv(dbgi, value);
1752
1753         ir_node *memory = get_store();
1754
1755         if (is_type_scalar(type)) {
1756                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1757                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1758                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1759                         set_Store_volatility(store, volatility_is_volatile);
1760                 set_store(store_mem);
1761         } else {
1762                 ir_type *irtype    = get_ir_type(type);
1763                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1764                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1765                 set_store(copyb_mem);
1766         }
1767 }
1768
1769 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1770 {
1771         tarval *all_one   = get_mode_all_one(mode);
1772         int     mode_size = get_mode_size_bits(mode);
1773
1774         assert(offset >= 0);
1775         assert(size   >= 0);
1776         assert(offset + size <= mode_size);
1777         if (size == mode_size) {
1778                 return all_one;
1779         }
1780
1781         long    shiftr    = get_mode_size_bits(mode) - size;
1782         long    shiftl    = offset;
1783         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1784         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1785         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1786         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1787
1788         return mask1;
1789 }
1790
1791 static void bitfield_store_to_firm(dbg_info *dbgi,
1792                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1793 {
1794         ir_type *entity_type = get_entity_type(entity);
1795         ir_type *base_type   = get_primitive_base_type(entity_type);
1796         assert(base_type != NULL);
1797         ir_mode *mode        = get_type_mode(base_type);
1798
1799         value = create_conv(dbgi, value, mode);
1800
1801         /* kill upper bits of value and shift to right position */
1802         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1803         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1804
1805         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1806         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1807         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1808         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1809         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1810         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1811
1812         /* load current value */
1813         ir_node  *mem             = get_store();
1814         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1815         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1816         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1817         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1818         tarval   *inv_mask        = tarval_not(shift_mask);
1819         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1820         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1821
1822         /* construct new value and store */
1823         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1824         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1825         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1826         set_store(store_mem);
1827
1828         if (set_volatile) {
1829                 set_Load_volatility(load, volatility_is_volatile);
1830                 set_Store_volatility(store, volatility_is_volatile);
1831         }
1832 }
1833
1834 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1835                 ir_node *addr)
1836 {
1837         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1838         type_t   *type     = expression->base.type;
1839         ir_mode  *mode     = get_ir_mode(type);
1840         ir_node  *mem      = get_store();
1841         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1842         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1843         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1844
1845         load_res           = create_conv(dbgi, load_res, mode_int);
1846
1847         set_store(load_mem);
1848
1849         /* kill upper bits */
1850         ir_entity *entity       = expression->compound_entry->v.entity;
1851         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1852         ir_type   *entity_type  = get_entity_type(entity);
1853         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1854         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1855         assert(shift_bitsl >= 0);
1856         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1857         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1858         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1859
1860         long       shift_bitsr  = bitoffset + shift_bitsl;
1861         assert(shift_bitsr <= (long) machine_size);
1862         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1863         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1864         ir_node   *shiftr;
1865         if (mode_is_signed(mode)) {
1866                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1867         } else {
1868                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1869         }
1870
1871         return create_conv(dbgi, shiftr, mode);
1872 }
1873
1874 static void set_value_for_expression_addr(const expression_t *expression,
1875                                           ir_node *value, ir_node *addr)
1876 {
1877         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1878         value          = do_strict_conv(dbgi, value);
1879
1880         if (expression->kind == EXPR_REFERENCE) {
1881                 const reference_expression_t *ref = &expression->reference;
1882
1883                 declaration_t *declaration = ref->declaration;
1884                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1885                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1886                         set_value(declaration->v.value_number, value);
1887                         return;
1888                 }
1889         }
1890
1891         if (addr == NULL)
1892                 addr = expression_to_addr(expression);
1893
1894         type_t *type = skip_typeref(expression->base.type);
1895
1896         if (expression->kind == EXPR_SELECT) {
1897                 const select_expression_t *select = &expression->select;
1898
1899                 declaration_t *declaration = select->compound_entry;
1900                 if (declaration->type->kind == TYPE_BITFIELD) {
1901                         ir_entity *entity = select->compound_entry->v.entity;
1902                         bool       set_volatile
1903                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1904                         bitfield_store_to_firm(dbgi, entity, addr, value, set_volatile);
1905                         return;
1906                 }
1907         }
1908
1909         assign_value(dbgi, addr, type, value);
1910 }
1911
1912 static void set_value_for_expression(const expression_t *expression,
1913                                      ir_node *value)
1914 {
1915         set_value_for_expression_addr(expression, value, NULL);
1916 }
1917
1918 static ir_node *get_value_from_lvalue(const expression_t *expression,
1919                                       ir_node *addr)
1920 {
1921         if (expression->kind == EXPR_REFERENCE) {
1922                 const reference_expression_t *ref = &expression->reference;
1923
1924                 declaration_t *declaration = ref->declaration;
1925                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1926                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1927                         assert(addr == NULL);
1928                         ir_mode *mode = get_ir_mode(expression->base.type);
1929                         return get_value(declaration->v.value_number, mode);
1930                 }
1931         }
1932
1933         assert(addr != NULL);
1934         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1935
1936         ir_node *value;
1937         if (expression->kind == EXPR_SELECT &&
1938             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1939                 value = bitfield_extract_to_firm(&expression->select, addr);
1940         } else {
1941                 value = deref_address(dbgi, expression->base.type, addr);
1942         }
1943
1944         return value;
1945 }
1946
1947
1948 static ir_node *create_incdec(const unary_expression_t *expression)
1949 {
1950         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1951         const expression_t *value_expr = expression->value;
1952         ir_node            *addr       = expression_to_addr(value_expr);
1953         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1954
1955         type_t  *type = skip_typeref(expression->base.type);
1956         ir_mode *mode = get_ir_mode(expression->base.type);
1957
1958         ir_node *offset;
1959         if (is_type_pointer(type)) {
1960                 pointer_type_t *pointer_type = &type->pointer;
1961                 offset                       = get_type_size(pointer_type->points_to);
1962         } else {
1963                 assert(is_type_arithmetic(type));
1964                 offset = new_Const(mode, get_mode_one(mode));
1965         }
1966
1967         ir_node *result;
1968         ir_node *store_value;
1969         switch(expression->base.kind) {
1970         case EXPR_UNARY_POSTFIX_INCREMENT:
1971                 result      = value;
1972                 store_value = new_d_Add(dbgi, value, offset, mode);
1973                 break;
1974         case EXPR_UNARY_POSTFIX_DECREMENT:
1975                 result      = value;
1976                 store_value = new_d_Sub(dbgi, value, offset, mode);
1977                 break;
1978         case EXPR_UNARY_PREFIX_INCREMENT:
1979                 result      = new_d_Add(dbgi, value, offset, mode);
1980                 store_value = result;
1981                 break;
1982         case EXPR_UNARY_PREFIX_DECREMENT:
1983                 result      = new_d_Sub(dbgi, value, offset, mode);
1984                 store_value = result;
1985                 break;
1986         default:
1987                 panic("no incdec expr in create_incdec");
1988         }
1989
1990         set_value_for_expression_addr(value_expr, store_value, addr);
1991
1992         return result;
1993 }
1994
1995 static bool is_local_variable(expression_t *expression)
1996 {
1997         if (expression->kind != EXPR_REFERENCE)
1998                 return false;
1999         reference_expression_t *ref_expr    = &expression->reference;
2000         declaration_t          *declaration = ref_expr->declaration;
2001         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
2002 }
2003
2004 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2005 {
2006         switch(kind) {
2007         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2008         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2009         case EXPR_BINARY_NOTEQUAL:
2010                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2011         case EXPR_BINARY_ISLESS:
2012         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2013         case EXPR_BINARY_ISLESSEQUAL:
2014         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2015         case EXPR_BINARY_ISGREATER:
2016         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2017         case EXPR_BINARY_ISGREATEREQUAL:
2018         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2019         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2020
2021         default:
2022                 break;
2023         }
2024         panic("trying to get pn_Cmp from non-comparison binexpr type");
2025 }
2026
2027 /**
2028  * Handle the assume optimizer hint: check if a Confirm
2029  * node can be created.
2030  *
2031  * @param dbi    debug info
2032  * @param expr   the IL assume expression
2033  *
2034  * we support here only some simple cases:
2035  *  - var rel const
2036  *  - const rel val
2037  *  - var rel var
2038  */
2039 static ir_node *handle_assume_compare(dbg_info *dbi,
2040                                       const binary_expression_t *expression)
2041 {
2042         expression_t  *op1 = expression->left;
2043         expression_t  *op2 = expression->right;
2044         declaration_t *var2, *var = NULL;
2045         ir_node       *res = NULL;
2046         pn_Cmp         cmp_val;
2047
2048         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2049
2050         if (is_local_variable(op1) && is_local_variable(op2)) {
2051         var  = op1->reference.declaration;
2052             var2 = op2->reference.declaration;
2053
2054                 type_t  *const type = skip_typeref(var->type);
2055                 ir_mode *const mode = get_ir_mode(type);
2056
2057                 ir_node *const irn1 = get_value(var->v.value_number, mode);
2058                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2059
2060                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2061                 set_value(var2->v.value_number, res);
2062
2063                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2064                 set_value(var->v.value_number, res);
2065
2066                 return res;
2067         }
2068
2069         expression_t *con;
2070         if (is_local_variable(op1) && is_constant_expression(op2)) {
2071                 var = op1->reference.declaration;
2072                 con = op2;
2073         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2074                 cmp_val = get_inversed_pnc(cmp_val);
2075                 var = op2->reference.declaration;
2076                 con = op1;
2077         }
2078
2079         if (var != NULL) {
2080                 type_t  *const type = skip_typeref(var->type);
2081                 ir_mode *const mode = get_ir_mode(type);
2082
2083                 res = get_value(var->v.value_number, mode);
2084                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2085                 set_value(var->v.value_number, res);
2086         }
2087         return res;
2088 }
2089
2090 /**
2091  * Handle the assume optimizer hint.
2092  *
2093  * @param dbi    debug info
2094  * @param expr   the IL assume expression
2095  */
2096 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2097         switch(expression->kind) {
2098         case EXPR_BINARY_EQUAL:
2099         case EXPR_BINARY_NOTEQUAL:
2100         case EXPR_BINARY_LESS:
2101         case EXPR_BINARY_LESSEQUAL:
2102         case EXPR_BINARY_GREATER:
2103         case EXPR_BINARY_GREATEREQUAL:
2104                 return handle_assume_compare(dbi, &expression->binary);
2105         default:
2106                 return NULL;
2107         }
2108 }
2109
2110 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2111 {
2112         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2113         type_t   *type = skip_typeref(expression->base.type);
2114
2115         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2116                 return expression_to_addr(expression->value);
2117
2118         const expression_t *value = expression->value;
2119
2120         switch(expression->base.kind) {
2121         case EXPR_UNARY_NEGATE: {
2122                 ir_node *value_node = expression_to_firm(value);
2123                 ir_mode *mode = get_ir_mode(type);
2124                 return new_d_Minus(dbgi, value_node, mode);
2125         }
2126         case EXPR_UNARY_PLUS:
2127                 return expression_to_firm(value);
2128         case EXPR_UNARY_BITWISE_NEGATE: {
2129                 ir_node *value_node = expression_to_firm(value);
2130                 ir_mode *mode = get_ir_mode(type);
2131                 return new_d_Not(dbgi, value_node, mode);
2132         }
2133         case EXPR_UNARY_NOT: {
2134                 ir_node *value_node = _expression_to_firm(value);
2135                 value_node          = create_conv(dbgi, value_node, mode_b);
2136                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2137                 return res;
2138         }
2139         case EXPR_UNARY_DEREFERENCE: {
2140                 ir_node *value_node = expression_to_firm(value);
2141                 type_t  *value_type = skip_typeref(value->base.type);
2142                 assert(is_type_pointer(value_type));
2143                 type_t  *points_to  = value_type->pointer.points_to;
2144                 return deref_address(dbgi, points_to, value_node);
2145         }
2146         case EXPR_UNARY_POSTFIX_INCREMENT:
2147         case EXPR_UNARY_POSTFIX_DECREMENT:
2148         case EXPR_UNARY_PREFIX_INCREMENT:
2149         case EXPR_UNARY_PREFIX_DECREMENT:
2150                 return create_incdec(expression);
2151         case EXPR_UNARY_CAST: {
2152                 ir_node *value_node = expression_to_firm(value);
2153                 if (is_type_scalar(type)) {
2154                         ir_mode *mode = get_ir_mode(type);
2155                         ir_node *node = create_conv(dbgi, value_node, mode);
2156                         node = do_strict_conv(dbgi, node);
2157                         return node;
2158                 } else {
2159                         /* make sure firm type is constructed */
2160                         (void) get_ir_type(type);
2161                         return value_node;
2162                 }
2163         }
2164         case EXPR_UNARY_CAST_IMPLICIT: {
2165                 ir_node *value_node = expression_to_firm(value);
2166                 if (is_type_scalar(type)) {
2167                         ir_mode *mode = get_ir_mode(type);
2168                         return create_conv(dbgi, value_node, mode);
2169                 } else {
2170                         return value_node;
2171                 }
2172         }
2173         case EXPR_UNARY_ASSUME:
2174                 if (firm_opt.confirm)
2175                         return handle_assume(dbgi, value);
2176                 else
2177                         return NULL;
2178
2179         default:
2180                 break;
2181         }
2182         panic("invalid UNEXPR type found");
2183 }
2184
2185 /**
2186  * produces a 0/1 depending of the value of a mode_b node
2187  */
2188 static ir_node *produce_condition_result(const expression_t *expression,
2189                                          dbg_info *dbgi)
2190 {
2191         ir_mode *mode      = get_ir_mode(expression->base.type);
2192         ir_node *cur_block = get_cur_block();
2193
2194         ir_node *one_block = new_immBlock();
2195         ir_node *one       = new_Const(mode, get_mode_one(mode));
2196         ir_node *jmp_one   = new_d_Jmp(dbgi);
2197
2198         ir_node *zero_block = new_immBlock();
2199         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2200         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2201
2202         set_cur_block(cur_block);
2203         create_condition_evaluation(expression, one_block, zero_block);
2204         mature_immBlock(one_block);
2205         mature_immBlock(zero_block);
2206
2207         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2208         new_Block(2, in_cf);
2209
2210         ir_node *in[2] = { one, zero };
2211         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2212
2213         return val;
2214 }
2215
2216 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2217                 ir_node *value, type_t *type)
2218 {
2219         pointer_type_t *const pointer_type = &type->pointer;
2220         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2221         unsigned              elem_size    = get_type_size_const(points_to);
2222
2223         /* gcc extension: allow arithmetic with void * and function * */
2224         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2225             is_type_function(points_to))  {
2226                 elem_size = 1;
2227         }
2228
2229         assert(elem_size >= 1);
2230         if (elem_size == 1)
2231                 return value;
2232
2233         value = create_conv(dbgi, value, mode_int);
2234         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2235         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2236         return mul;
2237 }
2238
2239 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2240                           ir_node *left, ir_node *right)
2241 {
2242         ir_mode  *mode;
2243         type_t   *type_left  = skip_typeref(expression->left->base.type);
2244         type_t   *type_right = skip_typeref(expression->right->base.type);
2245
2246         expression_kind_t kind = expression->base.kind;
2247
2248         switch (kind) {
2249         case EXPR_BINARY_SHIFTLEFT:
2250         case EXPR_BINARY_SHIFTRIGHT:
2251         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2252         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2253                 mode  = get_irn_mode(left);
2254                 right = create_conv(dbgi, right, mode_uint);
2255                 break;
2256
2257         case EXPR_BINARY_SUB:
2258                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2259                         const pointer_type_t *const ptr_type = &type_left->pointer;
2260
2261                         mode = get_ir_mode(expression->base.type);
2262                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2263                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2264                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2265                         ir_node *const no_mem    = new_NoMem();
2266                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2267                                                                                                    mode, op_pin_state_floats);
2268                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2269                 }
2270                 /* fallthrough */
2271         case EXPR_BINARY_SUB_ASSIGN:
2272                 if (is_type_pointer(type_left)) {
2273                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2274                         mode  = get_ir_mode(type_left);
2275                         break;
2276                 }
2277                 goto normal_node;
2278
2279         case EXPR_BINARY_ADD:
2280         case EXPR_BINARY_ADD_ASSIGN:
2281                 if (is_type_pointer(type_left)) {
2282                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2283                         mode  = get_ir_mode(type_left);
2284                         break;
2285                 } else if (is_type_pointer(type_right)) {
2286                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2287                         mode  = get_ir_mode(type_right);
2288                         break;
2289                 }
2290                 goto normal_node;
2291
2292         default:
2293 normal_node:
2294                 mode = get_irn_mode(right);
2295                 left = create_conv(dbgi, left, mode);
2296                 break;
2297         }
2298
2299         switch (kind) {
2300         case EXPR_BINARY_ADD_ASSIGN:
2301         case EXPR_BINARY_ADD:
2302                 return new_d_Add(dbgi, left, right, mode);
2303         case EXPR_BINARY_SUB_ASSIGN:
2304         case EXPR_BINARY_SUB:
2305                 return new_d_Sub(dbgi, left, right, mode);
2306         case EXPR_BINARY_MUL_ASSIGN:
2307         case EXPR_BINARY_MUL:
2308                 return new_d_Mul(dbgi, left, right, mode);
2309         case EXPR_BINARY_BITWISE_AND:
2310         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2311                 return new_d_And(dbgi, left, right, mode);
2312         case EXPR_BINARY_BITWISE_OR:
2313         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2314                 return new_d_Or(dbgi, left, right, mode);
2315         case EXPR_BINARY_BITWISE_XOR:
2316         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2317                 return new_d_Eor(dbgi, left, right, mode);
2318         case EXPR_BINARY_SHIFTLEFT:
2319         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2320                 return new_d_Shl(dbgi, left, right, mode);
2321         case EXPR_BINARY_SHIFTRIGHT:
2322         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2323                 if (mode_is_signed(mode)) {
2324                         return new_d_Shrs(dbgi, left, right, mode);
2325                 } else {
2326                         return new_d_Shr(dbgi, left, right, mode);
2327                 }
2328         case EXPR_BINARY_DIV:
2329         case EXPR_BINARY_DIV_ASSIGN: {
2330                 ir_node *pin = new_Pin(new_NoMem());
2331                 ir_node *op;
2332                 ir_node *res;
2333                 if (mode_is_float(mode)) {
2334                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2335                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2336                 } else {
2337                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2338                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2339                 }
2340                 return res;
2341         }
2342         case EXPR_BINARY_MOD:
2343         case EXPR_BINARY_MOD_ASSIGN: {
2344                 ir_node *pin = new_Pin(new_NoMem());
2345                 assert(!mode_is_float(mode));
2346                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2347                                          op_pin_state_floats);
2348                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2349                 return res;
2350         }
2351         default:
2352                 panic("unexpected expression kind");
2353         }
2354 }
2355
2356 static ir_node *create_lazy_op(const binary_expression_t *expression)
2357 {
2358         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2359         type_t   *type = expression->base.type;
2360         ir_mode  *mode = get_ir_mode(type);
2361
2362         if (is_constant_expression(expression->left)) {
2363                 long val = fold_constant(expression->left);
2364                 expression_kind_t ekind = expression->base.kind;
2365                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2366                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2367                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2368                         return expression_to_firm(expression->right);
2369                 } else {
2370                         return new_Const(mode, get_mode_one(mode));
2371                 }
2372         }
2373
2374         return produce_condition_result((const expression_t*) expression, dbgi);
2375 }
2376
2377 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2378                                             ir_node *right, ir_mode *mode);
2379
2380 static ir_node *create_assign_binop(const binary_expression_t *expression)
2381 {
2382         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2383         const expression_t *left_expr = expression->left;
2384         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2385         ir_node            *right     = expression_to_firm(expression->right);
2386         ir_node            *left_addr = expression_to_addr(left_expr);
2387         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2388         ir_node            *result    = create_op(dbgi, expression, left, right);
2389
2390         result = create_conv(dbgi, result, left_mode);
2391         result = do_strict_conv(dbgi, result);
2392
2393         set_value_for_expression_addr(left_expr, result, left_addr);
2394
2395         return result;
2396 }
2397
2398 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2399 {
2400         expression_kind_t kind = expression->base.kind;
2401
2402         switch(kind) {
2403         case EXPR_BINARY_EQUAL:
2404         case EXPR_BINARY_NOTEQUAL:
2405         case EXPR_BINARY_LESS:
2406         case EXPR_BINARY_LESSEQUAL:
2407         case EXPR_BINARY_GREATER:
2408         case EXPR_BINARY_GREATEREQUAL:
2409         case EXPR_BINARY_ISGREATER:
2410         case EXPR_BINARY_ISGREATEREQUAL:
2411         case EXPR_BINARY_ISLESS:
2412         case EXPR_BINARY_ISLESSEQUAL:
2413         case EXPR_BINARY_ISLESSGREATER:
2414         case EXPR_BINARY_ISUNORDERED: {
2415                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2416                 ir_node *left  = expression_to_firm(expression->left);
2417                 ir_node *right = expression_to_firm(expression->right);
2418                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2419                 long     pnc   = get_pnc(kind, expression->left->base.type);
2420                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2421                 return proj;
2422         }
2423         case EXPR_BINARY_ASSIGN: {
2424                 ir_node *addr  = expression_to_addr(expression->left);
2425                 ir_node *right = expression_to_firm(expression->right);
2426                 set_value_for_expression_addr(expression->left, right, addr);
2427
2428                 return right;
2429         }
2430         case EXPR_BINARY_ADD:
2431         case EXPR_BINARY_SUB:
2432         case EXPR_BINARY_MUL:
2433         case EXPR_BINARY_DIV:
2434         case EXPR_BINARY_MOD:
2435         case EXPR_BINARY_BITWISE_AND:
2436         case EXPR_BINARY_BITWISE_OR:
2437         case EXPR_BINARY_BITWISE_XOR:
2438         case EXPR_BINARY_SHIFTLEFT:
2439         case EXPR_BINARY_SHIFTRIGHT:
2440         {
2441                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2442                 ir_node  *left  = expression_to_firm(expression->left);
2443                 ir_node  *right = expression_to_firm(expression->right);
2444                 return create_op(dbgi, expression, left, right);
2445         }
2446         case EXPR_BINARY_LOGICAL_AND:
2447         case EXPR_BINARY_LOGICAL_OR:
2448                 return create_lazy_op(expression);
2449         case EXPR_BINARY_COMMA:
2450                 /* create side effects of left side */
2451                 (void) expression_to_firm(expression->left);
2452                 return _expression_to_firm(expression->right);
2453
2454         case EXPR_BINARY_ADD_ASSIGN:
2455         case EXPR_BINARY_SUB_ASSIGN:
2456         case EXPR_BINARY_MUL_ASSIGN:
2457         case EXPR_BINARY_MOD_ASSIGN:
2458         case EXPR_BINARY_DIV_ASSIGN:
2459         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2460         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2461         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2462         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2463         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2464                 return create_assign_binop(expression);
2465         case EXPR_BINARY_BUILTIN_EXPECT:
2466                 return _expression_to_firm(expression->left);
2467         default:
2468                 panic("TODO binexpr type");
2469         }
2470 }
2471
2472 static ir_node *array_access_addr(const array_access_expression_t *expression)
2473 {
2474         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2475         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2476         ir_node  *offset    = expression_to_firm(expression->index);
2477
2478         type_t  *offset_type = skip_typeref(expression->index->base.type);
2479         ir_mode *mode;
2480         if (is_type_signed(offset_type)) {
2481                 mode = get_ir_mode(type_ssize_t);
2482         } else {
2483                 mode = get_ir_mode(type_size_t);
2484         }
2485         offset = create_conv(dbgi, offset, mode);
2486
2487         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2488         assert(is_type_pointer(ref_type));
2489         pointer_type_t *pointer_type = &ref_type->pointer;
2490
2491         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2492         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2493         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2494                                              mode);
2495         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2496
2497         return result;
2498 }
2499
2500 static ir_node *array_access_to_firm(
2501                 const array_access_expression_t *expression)
2502 {
2503         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2504         ir_node  *addr   = array_access_addr(expression);
2505         type_t   *type   = revert_automatic_type_conversion(
2506                         (const expression_t*) expression);
2507         type             = skip_typeref(type);
2508
2509         return deref_address(dbgi, type, addr);
2510 }
2511
2512 static long get_offsetof_offset(const offsetof_expression_t *expression)
2513 {
2514         type_t *orig_type = expression->type;
2515         long    offset    = 0;
2516
2517         designator_t *designator = expression->designator;
2518         for( ; designator != NULL; designator = designator->next) {
2519                 type_t *type = skip_typeref(orig_type);
2520                 /* be sure the type is constructed */
2521                 (void) get_ir_type(type);
2522
2523                 if (designator->symbol != NULL) {
2524                         assert(is_type_compound(type));
2525                         symbol_t *symbol = designator->symbol;
2526
2527                         declaration_t *declaration = type->compound.declaration;
2528                         declaration_t *iter        = declaration->scope.declarations;
2529                         for( ; iter != NULL; iter = iter->next) {
2530                                 if (iter->symbol == symbol) {
2531                                         break;
2532                                 }
2533                         }
2534                         assert(iter != NULL);
2535
2536                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2537                         offset += get_entity_offset(iter->v.entity);
2538
2539                         orig_type = iter->type;
2540                 } else {
2541                         expression_t *array_index = designator->array_index;
2542                         assert(designator->array_index != NULL);
2543                         assert(is_type_array(type));
2544
2545                         long index         = fold_constant(array_index);
2546                         ir_type *arr_type  = get_ir_type(type);
2547                         ir_type *elem_type = get_array_element_type(arr_type);
2548                         long     elem_size = get_type_size_bytes(elem_type);
2549
2550                         offset += index * elem_size;
2551
2552                         orig_type = type->array.element_type;
2553                 }
2554         }
2555
2556         return offset;
2557 }
2558
2559 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2560 {
2561         ir_mode  *mode   = get_ir_mode(expression->base.type);
2562         long      offset = get_offsetof_offset(expression);
2563         tarval   *tv     = new_tarval_from_long(offset, mode);
2564         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2565
2566         return new_d_Const(dbgi, mode, tv);
2567 }
2568
2569 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2570                                      ir_entity *entity, type_t *type);
2571
2572 static ir_node *compound_literal_to_firm(
2573                 const compound_literal_expression_t *expression)
2574 {
2575         type_t *type = expression->type;
2576
2577         /* create an entity on the stack */
2578         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2579
2580         ident     *const id     = id_unique("CompLit.%u");
2581         ir_type   *const irtype = get_ir_type(type);
2582         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2583         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2584         set_entity_ld_ident(entity, id);
2585
2586         set_entity_variability(entity, variability_uninitialized);
2587
2588         /* create initialisation code */
2589         initializer_t *initializer = expression->initializer;
2590         create_local_initializer(initializer, dbgi, entity, type);
2591
2592         /* create a sel for the compound literal address */
2593         ir_node *frame = get_local_frame(entity);
2594         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2595         return sel;
2596 }
2597
2598 /**
2599  * Transform a sizeof expression into Firm code.
2600  */
2601 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2602 {
2603         type_t *type = expression->type;
2604         if (type == NULL) {
2605                 type = expression->tp_expression->base.type;
2606                 assert(type != NULL);
2607         }
2608
2609         type = skip_typeref(type);
2610         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2611         if (is_type_array(type) && type->array.is_vla
2612                         && expression->tp_expression != NULL) {
2613                 expression_to_firm(expression->tp_expression);
2614         }
2615
2616         return get_type_size(type);
2617 }
2618
2619 /**
2620  * Transform an alignof expression into Firm code.
2621  */
2622 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2623 {
2624         type_t *type = expression->type;
2625         if (type == NULL) {
2626                 /* beware: if expression is a variable reference, return the
2627                    alignment of the variable. */
2628                 const expression_t *tp_expression = expression->tp_expression;
2629                 const declaration_t *declaration = expr_is_variable(tp_expression);
2630                 if (declaration != NULL) {
2631                         /* TODO: get the alignment of this variable. */
2632                 }
2633                 type = tp_expression->base.type;
2634                 assert(type != NULL);
2635         }
2636
2637         ir_mode *const mode = get_ir_mode(expression->base.type);
2638         symconst_symbol sym;
2639         sym.type_p = get_ir_type(type);
2640         return new_SymConst(mode, sym, symconst_type_align);
2641 }
2642
2643 static void init_ir_types(void);
2644
2645 long fold_constant(const expression_t *expression)
2646 {
2647         assert(is_type_valid(skip_typeref(expression->base.type)));
2648
2649         bool constant_folding_old = constant_folding;
2650         constant_folding = true;
2651
2652         init_ir_types();
2653
2654         assert(is_constant_expression(expression));
2655
2656         ir_graph *old_current_ir_graph = current_ir_graph;
2657         if (current_ir_graph == NULL) {
2658                 current_ir_graph = get_const_code_irg();
2659         }
2660
2661         ir_node *cnst = expression_to_firm(expression);
2662         current_ir_graph = old_current_ir_graph;
2663
2664         if (!is_Const(cnst)) {
2665                 panic("couldn't fold constant\n");
2666         }
2667
2668         tarval *tv = get_Const_tarval(cnst);
2669         if (!tarval_is_long(tv)) {
2670                 panic("result of constant folding is not integer\n");
2671         }
2672
2673         constant_folding = constant_folding_old;
2674
2675         return get_tarval_long(tv);
2676 }
2677
2678 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2679 {
2680         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2681
2682         /* first try to fold a constant condition */
2683         if (is_constant_expression(expression->condition)) {
2684                 long val = fold_constant(expression->condition);
2685                 if (val) {
2686                         expression_t *true_expression = expression->true_expression;
2687                         if (true_expression == NULL)
2688                                 true_expression = expression->condition;
2689                         return expression_to_firm(true_expression);
2690                 } else {
2691                         return expression_to_firm(expression->false_expression);
2692                 }
2693         }
2694
2695         ir_node *cur_block   = get_cur_block();
2696
2697         /* create the true block */
2698         ir_node *true_block  = new_immBlock();
2699
2700         ir_node *true_val = expression->true_expression != NULL ?
2701                 expression_to_firm(expression->true_expression) : NULL;
2702         ir_node *true_jmp = new_Jmp();
2703
2704         /* create the false block */
2705         ir_node *false_block = new_immBlock();
2706
2707         ir_node *false_val = expression_to_firm(expression->false_expression);
2708         ir_node *false_jmp = new_Jmp();
2709
2710         /* create the condition evaluation */
2711         set_cur_block(cur_block);
2712         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2713         if (expression->true_expression == NULL) {
2714                 if (cond_expr != NULL) {
2715                         true_val = cond_expr;
2716                 } else {
2717                         /* Condition ended with a short circuit (&&, ||, !) operation.
2718                          * Generate a "1" as value for the true branch. */
2719                         ir_mode *const mode = mode_Is;
2720                         true_val = new_Const(mode, get_mode_one(mode));
2721                 }
2722         }
2723         mature_immBlock(true_block);
2724         mature_immBlock(false_block);
2725
2726         /* create the common block */
2727         ir_node *in_cf[2] = { true_jmp, false_jmp };
2728         new_Block(2, in_cf);
2729
2730         /* TODO improve static semantics, so either both or no values are NULL */
2731         if (true_val == NULL || false_val == NULL)
2732                 return NULL;
2733
2734         ir_node *in[2] = { true_val, false_val };
2735         ir_mode *mode  = get_irn_mode(true_val);
2736         assert(get_irn_mode(false_val) == mode);
2737         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2738
2739         return val;
2740 }
2741
2742 /**
2743  * Returns an IR-node representing the address of a field.
2744  */
2745 static ir_node *select_addr(const select_expression_t *expression)
2746 {
2747         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2748
2749         ir_node *compound_addr = expression_to_firm(expression->compound);
2750
2751         /* make sure the type is constructed */
2752         type_t *type = skip_typeref(expression->compound->base.type);
2753         if (is_type_pointer(type)) {
2754                 type = type->pointer.points_to;
2755         }
2756         (void) get_ir_type(type);
2757
2758         declaration_t *entry = expression->compound_entry;
2759         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2760         ir_entity     *entity = entry->v.entity;
2761
2762         assert(entity != NULL);
2763
2764         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2765
2766         return sel;
2767 }
2768
2769 static ir_node *select_to_firm(const select_expression_t *expression)
2770 {
2771         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2772         ir_node  *addr = select_addr(expression);
2773         type_t   *type = revert_automatic_type_conversion(
2774                         (const expression_t*) expression);
2775         type           = skip_typeref(type);
2776
2777         declaration_t *entry      = expression->compound_entry;
2778         type_t        *entry_type = skip_typeref(entry->type);
2779
2780         if (entry_type->kind == TYPE_BITFIELD) {
2781                 return bitfield_extract_to_firm(expression, addr);
2782         }
2783
2784         return deref_address(dbgi, type, addr);
2785 }
2786
2787 /* Values returned by __builtin_classify_type. */
2788 typedef enum gcc_type_class
2789 {
2790         no_type_class = -1,
2791         void_type_class,
2792         integer_type_class,
2793         char_type_class,
2794         enumeral_type_class,
2795         boolean_type_class,
2796         pointer_type_class,
2797         reference_type_class,
2798         offset_type_class,
2799         real_type_class,
2800         complex_type_class,
2801         function_type_class,
2802         method_type_class,
2803         record_type_class,
2804         union_type_class,
2805         array_type_class,
2806         string_type_class,
2807         set_type_class,
2808         file_type_class,
2809         lang_type_class
2810 } gcc_type_class;
2811
2812 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2813 {
2814         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2815
2816         gcc_type_class tc;
2817         switch (type->kind)
2818         {
2819                 case TYPE_ATOMIC: {
2820                         const atomic_type_t *const atomic_type = &type->atomic;
2821                         switch (atomic_type->akind) {
2822                                 /* should not be reached */
2823                                 case ATOMIC_TYPE_INVALID:
2824                                         tc = no_type_class;
2825                                         goto make_const;
2826
2827                                 /* gcc cannot do that */
2828                                 case ATOMIC_TYPE_VOID:
2829                                         tc = void_type_class;
2830                                         goto make_const;
2831
2832                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2833                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2834                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2835                                 case ATOMIC_TYPE_SHORT:
2836                                 case ATOMIC_TYPE_USHORT:
2837                                 case ATOMIC_TYPE_INT:
2838                                 case ATOMIC_TYPE_UINT:
2839                                 case ATOMIC_TYPE_LONG:
2840                                 case ATOMIC_TYPE_ULONG:
2841                                 case ATOMIC_TYPE_LONGLONG:
2842                                 case ATOMIC_TYPE_ULONGLONG:
2843                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2844                                         tc = integer_type_class;
2845                                         goto make_const;
2846
2847                                 case ATOMIC_TYPE_FLOAT:
2848                                 case ATOMIC_TYPE_DOUBLE:
2849                                 case ATOMIC_TYPE_LONG_DOUBLE:
2850                                         tc = real_type_class;
2851                                         goto make_const;
2852                         }
2853                         panic("Unexpected atomic type in classify_type_to_firm().");
2854                 }
2855
2856                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2857                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2858                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2859                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2860                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2861                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2862                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2863                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2864
2865                 /* gcc handles this as integer */
2866                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2867
2868                 case TYPE_BUILTIN:
2869                 /* typedef/typeof should be skipped already */
2870                 case TYPE_TYPEDEF:
2871                 case TYPE_TYPEOF:
2872                 case TYPE_INVALID:
2873                 case TYPE_ERROR:
2874                         break;
2875         }
2876         panic("unexpected TYPE classify_type_to_firm().");
2877
2878 make_const: ;
2879         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2880         ir_mode  *const mode = mode_int;
2881         tarval   *const tv   = new_tarval_from_long(tc, mode);
2882         return new_d_Const(dbgi, mode, tv);
2883 }
2884
2885 static ir_node *function_name_to_firm(
2886                 const funcname_expression_t *const expr)
2887 {
2888         switch(expr->kind) {
2889         case FUNCNAME_FUNCTION:
2890         case FUNCNAME_PRETTY_FUNCTION:
2891         case FUNCNAME_FUNCDNAME:
2892                 if (current_function_name == NULL) {
2893                         const source_position_t *const src_pos = &expr->base.source_position;
2894                         const char *const name = current_function_decl->symbol->string;
2895                         const string_t string = { name, strlen(name) + 1 };
2896                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2897                 }
2898                 return current_function_name;
2899         case FUNCNAME_FUNCSIG:
2900                 if (current_funcsig == NULL) {
2901                         const source_position_t *const src_pos = &expr->base.source_position;
2902                         ir_entity *ent = get_irg_entity(current_ir_graph);
2903                         const char *const name = get_entity_ld_name(ent);
2904                         const string_t string = { name, strlen(name) + 1 };
2905                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2906                 }
2907                 return current_funcsig;
2908         }
2909         panic("Unsupported function name");
2910 }
2911
2912 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2913 {
2914         statement_t *statement = expr->statement;
2915
2916         assert(statement->kind == STATEMENT_COMPOUND);
2917         return compound_statement_to_firm(&statement->compound);
2918 }
2919
2920 static ir_node *va_start_expression_to_firm(
2921         const va_start_expression_t *const expr)
2922 {
2923         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2924         int        const n           = get_method_n_params(method_type) - 1;
2925         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2926         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2927         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2928         ir_node   *const no_mem      = new_NoMem();
2929         ir_node   *const arg_sel     =
2930                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2931
2932         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2933         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2934         set_value_for_expression(expr->ap, add);
2935
2936         return NULL;
2937 }
2938
2939 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2940 {
2941         type_t       *const type    = expr->base.type;
2942         expression_t *const ap_expr = expr->ap;
2943         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2944         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2945         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2946         ir_node      *const res     = deref_address(dbgi, type, ap);
2947
2948         ir_node      *const cnst    = get_type_size(expr->base.type);
2949         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2950
2951         set_value_for_expression_addr(ap_expr, add, ap_addr);
2952
2953         return res;
2954 }
2955
2956 static ir_node *dereference_addr(const unary_expression_t *const expression)
2957 {
2958         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2959         return expression_to_firm(expression->value);
2960 }
2961
2962 /**
2963  * Returns a IR-node representing an lvalue of the given expression.
2964  */
2965 static ir_node *expression_to_addr(const expression_t *expression)
2966 {
2967         switch(expression->kind) {
2968         case EXPR_REFERENCE:
2969                 return reference_addr(&expression->reference);
2970         case EXPR_ARRAY_ACCESS:
2971                 return array_access_addr(&expression->array_access);
2972         case EXPR_SELECT:
2973                 return select_addr(&expression->select);
2974         case EXPR_CALL:
2975                 return call_expression_to_firm(&expression->call);
2976         case EXPR_UNARY_DEREFERENCE: {
2977                 return dereference_addr(&expression->unary);
2978         }
2979         default:
2980                 break;
2981         }
2982         panic("trying to get address of non-lvalue");
2983 }
2984
2985 static ir_node *builtin_constant_to_firm(
2986                 const builtin_constant_expression_t *expression)
2987 {
2988         ir_mode *mode = get_ir_mode(expression->base.type);
2989         long     v;
2990
2991         if (is_constant_expression(expression->value)) {
2992                 v = 1;
2993         } else {
2994                 v = 0;
2995         }
2996         return new_Const_long(mode, v);
2997 }
2998
2999 static ir_node *builtin_prefetch_to_firm(
3000                 const builtin_prefetch_expression_t *expression)
3001 {
3002         ir_node *adr = expression_to_firm(expression->adr);
3003         /* no Firm support for prefetch yet */
3004         (void) adr;
3005         return NULL;
3006 }
3007
3008 static ir_node *get_label_block(declaration_t *label)
3009 {
3010         assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
3011
3012         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3013                 return label->v.block;
3014         }
3015         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3016
3017         /* beware: might be called from create initializer with current_ir_graph
3018          * set to const_code_irg. */
3019         ir_graph *rem    = current_ir_graph;
3020         current_ir_graph = current_function;
3021
3022         ir_node *old_cur_block = get_cur_block();
3023         ir_node *block         = new_immBlock();
3024         set_cur_block(old_cur_block);
3025
3026         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3027         label->v.block          = block;
3028
3029         ARR_APP1(declaration_t *, all_labels, label);
3030
3031         current_ir_graph = rem;
3032         return block;
3033 }
3034
3035 /**
3036  * Pointer to a label.  This is used for the
3037  * GNU address-of-label extension.
3038  */
3039 static ir_node *label_address_to_firm(
3040                 const label_address_expression_t *label)
3041 {
3042         ir_node    *block = get_label_block(label->declaration);
3043         ir_label_t  nr    = get_Block_label(block);
3044
3045         if (nr == 0) {
3046                 nr = get_irp_next_label_nr();
3047                 set_Block_label(block, nr);
3048         }
3049         symconst_symbol value;
3050         value.label = nr;
3051         return new_SymConst(mode_P_code, value, symconst_label);
3052 }
3053
3054 /**
3055  * creates firm nodes for an expression. The difference between this function
3056  * and expression_to_firm is, that this version might produce mode_b nodes
3057  * instead of mode_Is.
3058  */
3059 static ir_node *_expression_to_firm(const expression_t *expression)
3060 {
3061 #ifndef NDEBUG
3062         if (!constant_folding) {
3063                 assert(!expression->base.transformed);
3064                 ((expression_t*) expression)->base.transformed = true;
3065         }
3066 #endif
3067
3068         switch (expression->kind) {
3069         case EXPR_CHARACTER_CONSTANT:
3070                 return character_constant_to_firm(&expression->conste);
3071         case EXPR_WIDE_CHARACTER_CONSTANT:
3072                 return wide_character_constant_to_firm(&expression->conste);
3073         case EXPR_CONST:
3074                 return const_to_firm(&expression->conste);
3075         case EXPR_STRING_LITERAL:
3076                 return string_literal_to_firm(&expression->string);
3077         case EXPR_WIDE_STRING_LITERAL:
3078                 return wide_string_literal_to_firm(&expression->wide_string);
3079         case EXPR_REFERENCE:
3080                 return reference_expression_to_firm(&expression->reference);
3081         case EXPR_CALL:
3082                 return call_expression_to_firm(&expression->call);
3083         EXPR_UNARY_CASES
3084                 return unary_expression_to_firm(&expression->unary);
3085         EXPR_BINARY_CASES
3086                 return binary_expression_to_firm(&expression->binary);
3087         case EXPR_ARRAY_ACCESS:
3088                 return array_access_to_firm(&expression->array_access);
3089         case EXPR_SIZEOF:
3090                 return sizeof_to_firm(&expression->typeprop);
3091         case EXPR_ALIGNOF:
3092                 return alignof_to_firm(&expression->typeprop);
3093         case EXPR_CONDITIONAL:
3094                 return conditional_to_firm(&expression->conditional);
3095         case EXPR_SELECT:
3096                 return select_to_firm(&expression->select);
3097         case EXPR_CLASSIFY_TYPE:
3098                 return classify_type_to_firm(&expression->classify_type);
3099         case EXPR_FUNCNAME:
3100                 return function_name_to_firm(&expression->funcname);
3101         case EXPR_STATEMENT:
3102                 return statement_expression_to_firm(&expression->statement);
3103         case EXPR_VA_START:
3104                 return va_start_expression_to_firm(&expression->va_starte);
3105         case EXPR_VA_ARG:
3106                 return va_arg_expression_to_firm(&expression->va_arge);
3107         case EXPR_BUILTIN_SYMBOL:
3108                 panic("unimplemented expression found");
3109         case EXPR_BUILTIN_CONSTANT_P:
3110                 return builtin_constant_to_firm(&expression->builtin_constant);
3111         case EXPR_BUILTIN_PREFETCH:
3112                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3113         case EXPR_OFFSETOF:
3114                 return offsetof_to_firm(&expression->offsetofe);
3115         case EXPR_COMPOUND_LITERAL:
3116                 return compound_literal_to_firm(&expression->compound_literal);
3117         case EXPR_LABEL_ADDRESS:
3118                 return label_address_to_firm(&expression->label_address);
3119
3120         case EXPR_UNKNOWN:
3121         case EXPR_INVALID:
3122                 break;
3123         }
3124         panic("invalid expression found");
3125 }
3126
3127 static bool produces_mode_b(const expression_t *expression)
3128 {
3129         switch (expression->kind) {
3130         case EXPR_BINARY_EQUAL:
3131         case EXPR_BINARY_NOTEQUAL:
3132         case EXPR_BINARY_LESS:
3133         case EXPR_BINARY_LESSEQUAL:
3134         case EXPR_BINARY_GREATER:
3135         case EXPR_BINARY_GREATEREQUAL:
3136         case EXPR_BINARY_ISGREATER:
3137         case EXPR_BINARY_ISGREATEREQUAL:
3138         case EXPR_BINARY_ISLESS:
3139         case EXPR_BINARY_ISLESSEQUAL:
3140         case EXPR_BINARY_ISLESSGREATER:
3141         case EXPR_BINARY_ISUNORDERED:
3142         case EXPR_UNARY_NOT:
3143                 return true;
3144
3145         case EXPR_BINARY_BUILTIN_EXPECT:
3146                 return produces_mode_b(expression->binary.left);
3147         case EXPR_BINARY_COMMA:
3148                 return produces_mode_b(expression->binary.right);
3149
3150         default:
3151                 return false;
3152         }
3153 }
3154
3155 static ir_node *expression_to_firm(const expression_t *expression)
3156 {
3157         if (!produces_mode_b(expression)) {
3158                 ir_node *res = _expression_to_firm(expression);
3159                 assert(res == NULL || get_irn_mode(res) != mode_b);
3160                 return res;
3161         }
3162
3163         if (is_constant_expression(expression)) {
3164                 ir_node *res  = _expression_to_firm(expression);
3165                 ir_mode *mode = get_ir_mode(expression->base.type);
3166                 assert(is_Const(res));
3167                 if (is_Const_null(res)) {
3168                         return new_Const_long(mode, 0);
3169                 } else {
3170                         return new_Const_long(mode, 1);
3171                 }
3172         }
3173
3174         /* we have to produce a 0/1 from the mode_b expression */
3175         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3176         return produce_condition_result(expression, dbgi);
3177 }
3178
3179 /**
3180  * create a short-circuit expression evaluation that tries to construct
3181  * efficient control flow structures for &&, || and ! expressions
3182  */
3183 static ir_node *create_condition_evaluation(const expression_t *expression,
3184                                             ir_node *true_block,
3185                                             ir_node *false_block)
3186 {
3187         switch(expression->kind) {
3188         case EXPR_UNARY_NOT: {
3189                 const unary_expression_t *unary_expression = &expression->unary;
3190                 create_condition_evaluation(unary_expression->value, false_block,
3191                                             true_block);
3192                 return NULL;
3193         }
3194         case EXPR_BINARY_LOGICAL_AND: {
3195                 const binary_expression_t *binary_expression = &expression->binary;
3196
3197                 ir_node *cur_block   = get_cur_block();
3198                 ir_node *extra_block = new_immBlock();
3199                 set_cur_block(cur_block);
3200                 create_condition_evaluation(binary_expression->left, extra_block,
3201                                             false_block);
3202                 mature_immBlock(extra_block);
3203                 set_cur_block(extra_block);
3204                 create_condition_evaluation(binary_expression->right, true_block,
3205                                             false_block);
3206                 return NULL;
3207         }
3208         case EXPR_BINARY_LOGICAL_OR: {
3209                 const binary_expression_t *binary_expression = &expression->binary;
3210
3211                 ir_node *cur_block   = get_cur_block();
3212                 ir_node *extra_block = new_immBlock();
3213                 set_cur_block(cur_block);
3214                 create_condition_evaluation(binary_expression->left, true_block,
3215                                             extra_block);
3216                 mature_immBlock(extra_block);
3217                 set_cur_block(extra_block);
3218                 create_condition_evaluation(binary_expression->right, true_block,
3219                                             false_block);
3220                 return NULL;
3221         }
3222         default:
3223                 break;
3224         }
3225
3226         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3227         ir_node  *cond_expr  = _expression_to_firm(expression);
3228         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3229         ir_node  *cond       = new_d_Cond(dbgi, condition);
3230         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3231         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3232
3233         /* set branch prediction info based on __builtin_expect */
3234         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3235                 long               cnst = fold_constant(expression->binary.right);
3236                 cond_jmp_predicate pred;
3237
3238                 if (cnst == 0) {
3239                         pred = COND_JMP_PRED_FALSE;
3240                 } else {
3241                         pred = COND_JMP_PRED_TRUE;
3242                 }
3243                 set_Cond_jmp_pred(cond, pred);
3244         }
3245
3246         add_immBlock_pred(true_block, true_proj);
3247         if (false_block != NULL) {
3248                 add_immBlock_pred(false_block, false_proj);
3249         }
3250
3251         set_cur_block(NULL);
3252         return cond_expr;
3253 }
3254
3255
3256
3257 static void create_declaration_entity(declaration_t *declaration,
3258                                       declaration_kind_t declaration_kind,
3259                                       ir_type *parent_type)
3260 {
3261         type_t    *const type   = skip_typeref(declaration->type);
3262         if (is_type_function(type)) {
3263                 (void) get_function_entity(declaration);
3264                 return;
3265         }
3266
3267         ident     *const id     = new_id_from_str(declaration->symbol->string);
3268         ir_type   *const irtype = get_ir_type(type);
3269         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3270         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3271
3272         handle_gnu_attributes_ent(entity, declaration);
3273
3274         declaration->declaration_kind = (unsigned char) declaration_kind;
3275         declaration->v.entity         = entity;
3276         set_entity_variability(entity, variability_uninitialized);
3277         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3278         if (parent_type == get_tls_type())
3279                 set_entity_allocation(entity, allocation_automatic);
3280         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3281                 set_entity_allocation(entity, allocation_static);
3282
3283         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3284                 set_entity_volatility(entity, volatility_is_volatile);
3285         }
3286 }
3287
3288
3289 typedef struct type_path_entry_t type_path_entry_t;
3290 struct type_path_entry_t {
3291         type_t           *type;
3292         ir_initializer_t *initializer;
3293         size_t            index;
3294         declaration_t    *compound_entry;
3295 };
3296
3297 typedef struct type_path_t type_path_t;
3298 struct type_path_t {
3299         type_path_entry_t *path;
3300         type_t            *top_type;
3301         bool               invalid;
3302 };
3303
3304 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3305 {
3306         size_t len = ARR_LEN(path->path);
3307
3308         for(size_t i = 0; i < len; ++i) {
3309                 const type_path_entry_t *entry = & path->path[i];
3310
3311                 type_t *type = skip_typeref(entry->type);
3312                 if (is_type_compound(type)) {
3313                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3314                 } else if (is_type_array(type)) {
3315                         fprintf(stderr, "[%zu]", entry->index);
3316                 } else {
3317                         fprintf(stderr, "-INVALID-");
3318                 }
3319         }
3320         fprintf(stderr, "  (");
3321         print_type(path->top_type);
3322         fprintf(stderr, ")");
3323 }
3324
3325 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3326 {
3327         size_t len = ARR_LEN(path->path);
3328         assert(len > 0);
3329         return & path->path[len-1];
3330 }
3331
3332 static type_path_entry_t *append_to_type_path(type_path_t *path)
3333 {
3334         size_t len = ARR_LEN(path->path);
3335         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3336
3337         type_path_entry_t *result = & path->path[len];
3338         memset(result, 0, sizeof(result[0]));
3339         return result;
3340 }
3341
3342 static size_t get_compound_size(const compound_type_t *type)
3343 {
3344         declaration_t *declaration = type->declaration;
3345         declaration_t *member      = declaration->scope.declarations;
3346         size_t         size        = 0;
3347         for( ; member != NULL; member = member->next) {
3348                 ++size;
3349         }
3350         /* TODO: cache results? */
3351
3352         return size;
3353 }
3354
3355 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3356 {
3357         type_t *orig_top_type = path->top_type;
3358         type_t *top_type      = skip_typeref(orig_top_type);
3359
3360         assert(is_type_compound(top_type) || is_type_array(top_type));
3361
3362         if (ARR_LEN(path->path) == 0) {
3363                 return NULL;
3364         } else {
3365                 type_path_entry_t *top         = get_type_path_top(path);
3366                 ir_initializer_t  *initializer = top->initializer;
3367                 return get_initializer_compound_value(initializer, top->index);
3368         }
3369 }
3370
3371 static void descend_into_subtype(type_path_t *path)
3372 {
3373         type_t *orig_top_type = path->top_type;
3374         type_t *top_type      = skip_typeref(orig_top_type);
3375
3376         assert(is_type_compound(top_type) || is_type_array(top_type));
3377
3378         ir_initializer_t *initializer = get_initializer_entry(path);
3379
3380         type_path_entry_t *top = append_to_type_path(path);
3381         top->type              = top_type;
3382
3383         size_t len;
3384
3385         if (is_type_compound(top_type)) {
3386                 declaration_t *declaration = top_type->compound.declaration;
3387                 declaration_t *entry       = declaration->scope.declarations;
3388
3389                 top->compound_entry = entry;
3390                 top->index          = 0;
3391                 len                 = get_compound_size(&top_type->compound);
3392                 if (entry != NULL)
3393                         path->top_type = entry->type;
3394         } else {
3395                 assert(is_type_array(top_type));
3396                 assert(top_type->array.size > 0);
3397
3398                 top->index     = 0;
3399                 path->top_type = top_type->array.element_type;
3400                 len            = top_type->array.size;
3401         }
3402         if (initializer == NULL
3403                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3404                 initializer = create_initializer_compound(len);
3405                 /* we have to set the entry at the 2nd latest path entry... */
3406                 size_t path_len = ARR_LEN(path->path);
3407                 assert(path_len >= 1);
3408                 if (path_len > 1) {
3409                         type_path_entry_t *entry        = & path->path[path_len-2];
3410                         ir_initializer_t  *tinitializer = entry->initializer;
3411                         set_initializer_compound_value(tinitializer, entry->index,
3412                                                        initializer);
3413                 }
3414         }
3415         top->initializer = initializer;
3416 }
3417
3418 static void ascend_from_subtype(type_path_t *path)
3419 {
3420         type_path_entry_t *top = get_type_path_top(path);
3421
3422         path->top_type = top->type;
3423
3424         size_t len = ARR_LEN(path->path);
3425         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3426 }
3427
3428 static void walk_designator(type_path_t *path, const designator_t *designator)
3429 {
3430         /* designators start at current object type */
3431         ARR_RESIZE(type_path_entry_t, path->path, 1);
3432
3433         for( ; designator != NULL; designator = designator->next) {
3434                 type_path_entry_t *top         = get_type_path_top(path);
3435                 type_t            *orig_type   = top->type;
3436                 type_t            *type        = skip_typeref(orig_type);
3437
3438                 if (designator->symbol != NULL) {
3439                         assert(is_type_compound(type));
3440                         size_t    index  = 0;
3441                         symbol_t *symbol = designator->symbol;
3442
3443                         declaration_t *declaration = type->compound.declaration;
3444                         declaration_t *iter        = declaration->scope.declarations;
3445                         for( ; iter != NULL; iter = iter->next, ++index) {
3446                                 if (iter->symbol == symbol) {
3447                                         break;
3448                                 }
3449                         }
3450                         assert(iter != NULL);
3451
3452                         top->type           = orig_type;
3453                         top->compound_entry = iter;
3454                         top->index          = index;
3455                         orig_type           = iter->type;
3456                 } else {
3457                         expression_t *array_index = designator->array_index;
3458                         assert(designator->array_index != NULL);
3459                         assert(is_type_array(type));
3460
3461                         long index = fold_constant(array_index);
3462                         assert(index >= 0);
3463 #ifndef NDEBUG
3464                         if (type->array.size_constant) {
3465                                 long array_size = type->array.size;
3466                                 assert(index < array_size);
3467                         }
3468 #endif
3469
3470                         top->type  = orig_type;
3471                         top->index = (size_t) index;
3472                         orig_type  = type->array.element_type;
3473                 }
3474                 path->top_type = orig_type;
3475
3476                 if (designator->next != NULL) {
3477                         descend_into_subtype(path);
3478                 }
3479         }
3480
3481         path->invalid  = false;
3482 }
3483
3484 static void advance_current_object(type_path_t *path)
3485 {
3486         if (path->invalid) {
3487                 /* TODO: handle this... */
3488                 panic("invalid initializer in ast2firm (excessive elements)");
3489                 return;
3490         }
3491
3492         type_path_entry_t *top = get_type_path_top(path);
3493
3494         type_t *type = skip_typeref(top->type);
3495         if (is_type_union(type)) {
3496                 top->compound_entry = NULL;
3497         } else if (is_type_struct(type)) {
3498                 declaration_t *entry = top->compound_entry;
3499
3500                 top->index++;
3501                 entry               = entry->next;
3502                 top->compound_entry = entry;
3503                 if (entry != NULL) {
3504                         path->top_type = entry->type;
3505                         return;
3506                 }
3507         } else {
3508                 assert(is_type_array(type));
3509
3510                 top->index++;
3511                 if (!type->array.size_constant || top->index < type->array.size) {
3512                         return;
3513                 }
3514         }
3515
3516         /* we're past the last member of the current sub-aggregate, try if we
3517          * can ascend in the type hierarchy and continue with another subobject */
3518         size_t len = ARR_LEN(path->path);
3519
3520         if (len > 1) {
3521                 ascend_from_subtype(path);
3522                 advance_current_object(path);
3523         } else {
3524                 path->invalid = true;
3525         }
3526 }
3527
3528
3529 static ir_initializer_t *create_ir_initializer(
3530                 const initializer_t *initializer, type_t *type);
3531
3532 static ir_initializer_t *create_ir_initializer_value(
3533                 const initializer_value_t *initializer)
3534 {
3535         if (is_type_compound(initializer->value->base.type)) {
3536                 panic("initializer creation for compounds not implemented yet");
3537         }
3538         ir_node *value = expression_to_firm(initializer->value);
3539         return create_initializer_const(value);
3540 }
3541
3542 static ir_initializer_t *create_ir_initializer_list(
3543                 const initializer_list_t *initializer, type_t *type)
3544 {
3545         type_path_t path;
3546         memset(&path, 0, sizeof(path));
3547         path.top_type = type;
3548         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3549
3550         descend_into_subtype(&path);
3551
3552         for(size_t i = 0; i < initializer->len; ++i) {
3553                 const initializer_t *sub_initializer = initializer->initializers[i];
3554
3555                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3556                         walk_designator(&path, sub_initializer->designator.designator);
3557                         continue;
3558                 }
3559
3560                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3561                         /* we might have to descend into types until we're at a scalar
3562                          * type */
3563                         while(true) {
3564                                 type_t *orig_top_type = path.top_type;
3565                                 type_t *top_type      = skip_typeref(orig_top_type);
3566
3567                                 if (is_type_scalar(top_type))
3568                                         break;
3569                                 descend_into_subtype(&path);
3570                         }
3571                 }
3572
3573                 ir_initializer_t *sub_irinitializer
3574                         = create_ir_initializer(sub_initializer, path.top_type);
3575
3576                 size_t path_len = ARR_LEN(path.path);
3577                 assert(path_len >= 1);
3578                 type_path_entry_t *entry        = & path.path[path_len-1];
3579                 ir_initializer_t  *tinitializer = entry->initializer;
3580                 set_initializer_compound_value(tinitializer, entry->index,
3581                                                sub_irinitializer);
3582
3583                 advance_current_object(&path);
3584         }
3585
3586         assert(ARR_LEN(path.path) >= 1);
3587         ir_initializer_t *result = path.path[0].initializer;
3588         DEL_ARR_F(path.path);
3589
3590         return result;
3591 }
3592
3593 static ir_initializer_t *create_ir_initializer_string(
3594                 const initializer_string_t *initializer, type_t *type)
3595 {
3596         type = skip_typeref(type);
3597
3598         size_t            string_len    = initializer->string.size;
3599         assert(type->kind == TYPE_ARRAY);
3600         assert(type->array.size_constant);
3601         size_t            len           = type->array.size;
3602         ir_initializer_t *irinitializer = create_initializer_compound(len);
3603
3604         const char *string = initializer->string.begin;
3605         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3606
3607         for(size_t i = 0; i < len; ++i) {
3608                 char c = 0;
3609                 if (i < string_len)
3610                         c = string[i];
3611
3612                 tarval           *tv = new_tarval_from_long(c, mode);
3613                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3614
3615                 set_initializer_compound_value(irinitializer, i, char_initializer);
3616         }
3617
3618         return irinitializer;
3619 }
3620
3621 static ir_initializer_t *create_ir_initializer_wide_string(
3622                 const initializer_wide_string_t *initializer, type_t *type)
3623 {
3624         size_t            string_len    = initializer->string.size;
3625         assert(type->kind == TYPE_ARRAY);
3626         assert(type->array.size_constant);
3627         size_t            len           = type->array.size;
3628         ir_initializer_t *irinitializer = create_initializer_compound(len);
3629
3630         const wchar_rep_t *string = initializer->string.begin;
3631         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3632
3633         for(size_t i = 0; i < len; ++i) {
3634                 wchar_rep_t c = 0;
3635                 if (i < string_len) {
3636                         c = string[i];
3637                 }
3638                 tarval *tv = new_tarval_from_long(c, mode);
3639                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3640
3641                 set_initializer_compound_value(irinitializer, i, char_initializer);
3642         }
3643
3644         return irinitializer;
3645 }
3646
3647 static ir_initializer_t *create_ir_initializer(
3648                 const initializer_t *initializer, type_t *type)
3649 {
3650         switch(initializer->kind) {
3651                 case INITIALIZER_STRING:
3652                         return create_ir_initializer_string(&initializer->string, type);
3653
3654                 case INITIALIZER_WIDE_STRING:
3655                         return create_ir_initializer_wide_string(&initializer->wide_string,
3656                                                                  type);
3657
3658                 case INITIALIZER_LIST:
3659                         return create_ir_initializer_list(&initializer->list, type);
3660
3661                 case INITIALIZER_VALUE:
3662                         return create_ir_initializer_value(&initializer->value);
3663
3664                 case INITIALIZER_DESIGNATOR:
3665                         panic("unexpected designator initializer found");
3666         }
3667         panic("unknown initializer");
3668 }
3669
3670 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3671                 ir_node *base_addr)
3672 {
3673         if (is_atomic_type(type)) {
3674                 ir_mode *mode = get_type_mode(type);
3675                 tarval  *zero = get_mode_null(mode);
3676                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3677
3678                 /* TODO: bitfields */
3679                 ir_node *mem    = get_store();
3680                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3681                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3682                 set_store(proj_m);
3683         } else {
3684                 assert(is_compound_type(type));
3685
3686                 int n_members;
3687                 if (is_Array_type(type)) {
3688                         assert(has_array_upper_bound(type, 0));
3689                         n_members = get_array_upper_bound_int(type, 0);
3690                 } else {
3691                         n_members = get_compound_n_members(type);
3692                 }
3693
3694                 for(int i = 0; i < n_members; ++i) {
3695                         ir_node *addr;
3696                         ir_type *irtype;
3697                         if (is_Array_type(type)) {
3698                                 ir_entity *entity   = get_array_element_entity(type);
3699                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3700                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3701                                 ir_node   *in[1]    = { cnst };
3702                                 irtype = get_array_element_type(type);
3703                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3704                         } else {
3705                                 ir_entity *member = get_compound_member(type, i);
3706
3707                                 irtype = get_entity_type(member);
3708                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3709                         }
3710
3711                         create_dynamic_null_initializer(irtype, dbgi, addr);
3712                 }
3713         }
3714 }
3715
3716 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3717                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3718 {
3719         switch(get_initializer_kind(initializer)) {
3720         case IR_INITIALIZER_NULL: {
3721                 create_dynamic_null_initializer(type, dbgi, base_addr);
3722                 return;
3723         }
3724         case IR_INITIALIZER_CONST: {
3725                 ir_node *node     = get_initializer_const_value(initializer);
3726                 ir_mode *mode     = get_irn_mode(node);
3727                 ir_type *ent_type = get_entity_type(entity);
3728
3729                 /* is it a bitfield type? */
3730                 if (is_Primitive_type(ent_type) &&
3731                                 get_primitive_base_type(ent_type) != NULL) {
3732                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3733                         return;
3734                 }
3735
3736                 assert(get_type_mode(type) == mode);
3737                 ir_node *mem    = get_store();
3738                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3739                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3740                 set_store(proj_m);
3741                 return;
3742         }
3743         case IR_INITIALIZER_TARVAL: {
3744                 tarval  *tv       = get_initializer_tarval_value(initializer);
3745                 ir_mode *mode     = get_tarval_mode(tv);
3746                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3747                 ir_type *ent_type = get_entity_type(entity);
3748
3749                 /* is it a bitfield type? */
3750                 if (is_Primitive_type(ent_type) &&
3751                                 get_primitive_base_type(ent_type) != NULL) {
3752                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3753                         return;
3754                 }
3755
3756                 assert(get_type_mode(type) == mode);
3757                 ir_node *mem    = get_store();
3758                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3759                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3760                 set_store(proj_m);
3761                 return;
3762         }
3763         case IR_INITIALIZER_COMPOUND: {
3764                 assert(is_compound_type(type));
3765                 int n_members;
3766                 if (is_Array_type(type)) {
3767                         assert(has_array_upper_bound(type, 0));
3768                         n_members = get_array_upper_bound_int(type, 0);
3769                 } else {
3770                         n_members = get_compound_n_members(type);
3771                 }
3772
3773                 if (get_initializer_compound_n_entries(initializer)
3774                                 != (unsigned) n_members)
3775                         panic("initializer doesn't match compound type");
3776
3777                 for(int i = 0; i < n_members; ++i) {
3778                         ir_node   *addr;
3779                         ir_type   *irtype;
3780                         ir_entity *sub_entity;
3781                         if (is_Array_type(type)) {
3782                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3783                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3784                                 ir_node   *in[1]    = { cnst };
3785                                 irtype     = get_array_element_type(type);
3786                                 sub_entity = get_array_element_entity(type);
3787                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3788                                                        sub_entity);
3789                         } else {
3790                                 sub_entity = get_compound_member(type, i);
3791                                 irtype     = get_entity_type(sub_entity);
3792                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3793                                                              sub_entity);
3794                         }
3795
3796                         ir_initializer_t *sub_init
3797                                 = get_initializer_compound_value(initializer, i);
3798
3799                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3800                                                        addr);
3801                 }
3802                 return;
3803         }
3804         }
3805
3806         panic("invalid IR_INITIALIZER found");
3807 }
3808
3809 static void create_dynamic_initializer(ir_initializer_t *initializer,
3810                 dbg_info *dbgi, ir_entity *entity)
3811 {
3812         ir_node *frame     = get_local_frame(entity);
3813         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3814         ir_type *type      = get_entity_type(entity);
3815
3816         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3817 }
3818
3819 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3820                                      ir_entity *entity, type_t *type)
3821 {
3822         ir_node *memory = get_store();
3823         ir_node *nomem  = new_NoMem();
3824         ir_node *frame  = get_irg_frame(current_ir_graph);
3825         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3826
3827         if (initializer->kind == INITIALIZER_VALUE) {
3828                 initializer_value_t *initializer_value = &initializer->value;
3829
3830                 ir_node *value = expression_to_firm(initializer_value->value);
3831                 type = skip_typeref(type);
3832                 assign_value(dbgi, addr, type, value);
3833                 return;
3834         }
3835
3836         if (!is_constant_initializer(initializer)) {
3837                 ir_initializer_t *irinitializer
3838                         = create_ir_initializer(initializer, type);
3839
3840                 create_dynamic_initializer(irinitializer, dbgi, entity);
3841                 return;
3842         }
3843
3844         /* create the ir_initializer */
3845         ir_graph *const old_current_ir_graph = current_ir_graph;
3846         current_ir_graph = get_const_code_irg();
3847
3848         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3849
3850         assert(current_ir_graph == get_const_code_irg());
3851         current_ir_graph = old_current_ir_graph;
3852
3853         /* create a "template" entity which is copied to the entity on the stack */
3854         ident     *const id          = id_unique("initializer.%u");
3855         ir_type   *const irtype      = get_ir_type(type);
3856         ir_type   *const global_type = get_glob_type();
3857         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3858         set_entity_ld_ident(init_entity, id);
3859
3860         set_entity_variability(init_entity, variability_initialized);
3861         set_entity_visibility(init_entity, visibility_local);
3862         set_entity_allocation(init_entity, allocation_static);
3863
3864         set_entity_initializer(init_entity, irinitializer);
3865
3866         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3867         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3868
3869         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3870         set_store(copyb_mem);
3871 }
3872
3873 static void create_initializer_local_variable_entity(declaration_t *declaration)
3874 {
3875         initializer_t *initializer = declaration->init.initializer;
3876         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3877         ir_entity     *entity      = declaration->v.entity;
3878         type_t        *type        = declaration->type;
3879         create_local_initializer(initializer, dbgi, entity, type);
3880 }
3881
3882 static void create_declaration_initializer(declaration_t *declaration)
3883 {
3884         initializer_t *initializer = declaration->init.initializer;
3885         if (initializer == NULL)
3886                 return;
3887
3888         declaration_kind_t declaration_kind
3889                 = (declaration_kind_t) declaration->declaration_kind;
3890         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3891                 create_initializer_local_variable_entity(declaration);
3892                 return;
3893         }
3894
3895         type_t            *type = declaration->type;
3896         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3897
3898         if (initializer->kind == INITIALIZER_VALUE) {
3899                 initializer_value_t *initializer_value = &initializer->value;
3900                 dbg_info            *dbgi
3901                         = get_dbg_info(&declaration->source_position);
3902
3903                 ir_node *value = expression_to_firm(initializer_value->value);
3904                 value = do_strict_conv(dbgi, value);
3905
3906                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3907                         set_value(declaration->v.value_number, value);
3908                 } else {
3909                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3910
3911                         ir_entity *entity = declaration->v.entity;
3912
3913                         if (tq & TYPE_QUALIFIER_CONST) {
3914                                 set_entity_variability(entity, variability_constant);
3915                         } else {
3916                                 set_entity_variability(entity, variability_initialized);
3917                         }
3918                         set_atomic_ent_value(entity, value);
3919                 }
3920         } else {
3921                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3922                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3923
3924                 ir_entity        *entity        = declaration->v.entity;
3925                 ir_initializer_t *irinitializer
3926                         = create_ir_initializer(initializer, type);
3927
3928                 if (tq & TYPE_QUALIFIER_CONST) {
3929                         set_entity_variability(entity, variability_constant);
3930                 } else {
3931                         set_entity_variability(entity, variability_initialized);
3932                 }
3933                 set_entity_initializer(entity, irinitializer);
3934         }
3935 }
3936
3937 static void create_variable_length_array(declaration_t *declaration)
3938 {
3939         /* initializers are not allowed for VLAs */
3940         assert(declaration->init.initializer == NULL);
3941
3942         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3943         declaration->v.vla_base       = NULL;
3944
3945         /* TODO: record VLA somewhere so we create the free node when we leave
3946          * it's scope */
3947 }
3948
3949 static void allocate_variable_length_array(declaration_t *declaration)
3950 {
3951         /* initializers are not allowed for VLAs */
3952         assert(declaration->init.initializer == NULL);
3953         assert(get_cur_block() != NULL);
3954
3955         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3956         type_t   *type      = declaration->type;
3957         ir_type  *el_type   = get_ir_type(type->array.element_type);
3958
3959         /* make sure size_node is calculated */
3960         get_type_size(type);
3961         ir_node  *elems = type->array.size_node;
3962         ir_node  *mem   = get_store();
3963         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3964
3965         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3966         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3967         set_store(proj_m);
3968
3969         assert(declaration->declaration_kind
3970                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3971         declaration->v.vla_base       = addr;
3972 }
3973
3974 /**
3975  * Creates a Firm local variable from a declaration.
3976  */
3977 static void create_local_variable(declaration_t *declaration)
3978 {
3979         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3980
3981         bool needs_entity = declaration->address_taken;
3982         type_t *type = skip_typeref(declaration->type);
3983
3984         /* is it a variable length array? */
3985         if (is_type_array(type) && !type->array.size_constant) {
3986                 create_variable_length_array(declaration);
3987                 return;
3988         } else if (is_type_array(type) || is_type_compound(type)) {
3989                 needs_entity = true;
3990         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3991                 needs_entity = true;
3992         }
3993
3994         if (needs_entity) {
3995                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3996                 create_declaration_entity(declaration,
3997                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3998                                           frame_type);
3999         } else {
4000                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4001                 declaration->v.value_number   = next_value_number_function;
4002                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
4003                 ++next_value_number_function;
4004         }
4005 }
4006
4007 static void create_local_static_variable(declaration_t *declaration)
4008 {
4009         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
4010
4011         type_t    *const type        = skip_typeref(declaration->type);
4012         ir_type   *const global_type = get_glob_type();
4013         ir_type   *const irtype      = get_ir_type(type);
4014         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
4015
4016         size_t l = strlen(declaration->symbol->string);
4017         char   buf[l + sizeof(".%u")];
4018         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
4019         ident     *const id = id_unique(buf);
4020
4021         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
4022
4023         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4024                 set_entity_volatility(entity, volatility_is_volatile);
4025         }
4026
4027         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4028         declaration->v.entity         = entity;
4029         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
4030         set_entity_variability(entity, variability_uninitialized);
4031         set_entity_visibility(entity, visibility_local);
4032         set_entity_allocation(entity, allocation_static);
4033
4034         ir_graph *const old_current_ir_graph = current_ir_graph;
4035         current_ir_graph = get_const_code_irg();
4036
4037         create_declaration_initializer(declaration);
4038
4039         assert(current_ir_graph == get_const_code_irg());
4040         current_ir_graph = old_current_ir_graph;
4041 }
4042
4043
4044
4045 static void return_statement_to_firm(return_statement_t *statement)
4046 {
4047         if (get_cur_block() == NULL)
4048                 return;
4049
4050         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4051         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
4052
4053
4054         ir_node *in[1];
4055         int      in_len;
4056         if (get_method_n_ress(func_irtype) > 0) {
4057                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4058
4059                 if (statement->value != NULL) {
4060                         ir_node *node = expression_to_firm(statement->value);
4061                         node  = do_strict_conv(dbgi, node);
4062                         in[0] = node;
4063                 } else {
4064                         ir_mode *mode;
4065                         if (is_compound_type(res_type)) {
4066                                 mode = mode_P_data;
4067                         } else {
4068                                 mode = get_type_mode(res_type);
4069                         }
4070                         in[0] = new_Unknown(mode);
4071                 }
4072                 in_len = 1;
4073         } else {
4074                 /* build return_value for its side effects */
4075                 if (statement->value != NULL) {
4076                         expression_to_firm(statement->value);
4077                 }
4078                 in_len = 0;
4079         }
4080
4081         ir_node  *store = get_store();
4082         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4083
4084         ir_node *end_block = get_irg_end_block(current_ir_graph);
4085         add_immBlock_pred(end_block, ret);
4086
4087         set_cur_block(NULL);
4088 }
4089
4090 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4091 {
4092         if (get_cur_block() == NULL)
4093                 return NULL;
4094
4095         return expression_to_firm(statement->expression);
4096 }
4097
4098 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4099 {
4100         declaration_t *declaration = compound->scope.declarations;
4101         for( ; declaration != NULL; declaration = declaration->next) {
4102                 create_local_declaration(declaration);
4103         }
4104
4105         ir_node     *result    = NULL;
4106         statement_t *statement = compound->statements;
4107         for( ; statement != NULL; statement = statement->base.next) {
4108                 if (statement->base.next == NULL
4109                                 && statement->kind == STATEMENT_EXPRESSION) {
4110                         result = expression_statement_to_firm(
4111                                         &statement->expression);
4112                         break;
4113                 }
4114                 statement_to_firm(statement);
4115         }
4116
4117         return result;
4118 }
4119
4120 static void create_global_variable(declaration_t *declaration)
4121 {
4122         ir_visibility  vis;
4123         ir_type       *var_type;
4124         switch ((storage_class_tag_t)declaration->storage_class) {
4125                 case STORAGE_CLASS_STATIC:
4126                         vis = visibility_local;
4127                         goto global_var;
4128
4129                 case STORAGE_CLASS_EXTERN:
4130                         vis = visibility_external_allocated;
4131                         goto global_var;
4132
4133                 case STORAGE_CLASS_NONE:
4134                         vis = visibility_external_visible;
4135                         goto global_var;
4136
4137                 case STORAGE_CLASS_THREAD:
4138                         vis = visibility_external_visible;
4139                         goto tls_var;
4140
4141                 case STORAGE_CLASS_THREAD_EXTERN:
4142                         vis = visibility_external_allocated;
4143                         goto tls_var;
4144
4145                 case STORAGE_CLASS_THREAD_STATIC:
4146                         vis = visibility_local;
4147                         goto tls_var;
4148
4149 tls_var:
4150                         var_type = get_tls_type();
4151                         goto create_var;
4152
4153 global_var:
4154                         var_type = get_glob_type();
4155                         goto create_var;
4156
4157 create_var:
4158                         create_declaration_entity(declaration,
4159                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4160                                                   var_type);
4161                         if (!is_type_function(skip_typeref(declaration->type))) {
4162                                 set_entity_visibility(declaration->v.entity, vis);
4163                         }
4164
4165                         return;
4166
4167                 case STORAGE_CLASS_TYPEDEF:
4168                 case STORAGE_CLASS_AUTO:
4169                 case STORAGE_CLASS_REGISTER:
4170                 case STORAGE_CLASS_ENUM_ENTRY:
4171                         break;
4172         }
4173         panic("Invalid storage class for global variable");
4174 }
4175
4176 static void create_local_declaration(declaration_t *declaration)
4177 {
4178         if (declaration->namespc != NAMESPACE_NORMAL)
4179                 return;
4180         /* construct type */
4181         (void) get_ir_type(declaration->type);
4182         if (declaration->symbol == NULL) {
4183                 return;
4184         }
4185
4186         type_t *type = skip_typeref(declaration->type);
4187
4188         switch ((storage_class_tag_t) declaration->storage_class) {
4189         case STORAGE_CLASS_STATIC:
4190                 create_local_static_variable(declaration);
4191                 return;
4192         case STORAGE_CLASS_EXTERN:
4193                 create_global_variable(declaration);
4194                 create_declaration_initializer(declaration);
4195                 return;
4196         case STORAGE_CLASS_NONE:
4197         case STORAGE_CLASS_AUTO:
4198         case STORAGE_CLASS_REGISTER:
4199                 if (is_type_function(type)) {
4200                         if (declaration->init.statement != NULL) {
4201                                 get_function_entity(declaration);
4202                                 declaration->declaration_kind = DECLARATION_KIND_INNER_FUNCTION;
4203                                 enqueue_inner_function(declaration);
4204                         } else {
4205                                 get_function_entity(declaration);
4206                         }
4207                 } else {
4208                         create_local_variable(declaration);
4209                 }
4210                 return;
4211         case STORAGE_CLASS_ENUM_ENTRY:
4212                 /* should already be handled */
4213                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4214                 return;
4215         case STORAGE_CLASS_TYPEDEF:
4216                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4217                 return;
4218         case STORAGE_CLASS_THREAD:
4219         case STORAGE_CLASS_THREAD_EXTERN:
4220         case STORAGE_CLASS_THREAD_STATIC:
4221                 break;
4222         }
4223         panic("invalid storage class found");
4224 }
4225
4226 static void initialize_local_declaration(declaration_t *declaration)
4227 {
4228         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4229                 return;
4230
4231         switch ((declaration_kind_t) declaration->declaration_kind) {
4232         case DECLARATION_KIND_LOCAL_VARIABLE:
4233         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4234                 create_declaration_initializer(declaration);
4235                 return;
4236
4237         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4238                 allocate_variable_length_array(declaration);
4239                 return;
4240
4241         case DECLARATION_KIND_LABEL_BLOCK:
4242         case DECLARATION_KIND_COMPOUND_MEMBER:
4243         case DECLARATION_KIND_GLOBAL_VARIABLE:
4244         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4245         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4246         case DECLARATION_KIND_FUNCTION:
4247         case DECLARATION_KIND_TYPE:
4248         case DECLARATION_KIND_ENUM_ENTRY:
4249         case DECLARATION_KIND_INNER_FUNCTION:
4250                 return;
4251
4252         case DECLARATION_KIND_UNKNOWN:
4253                 panic("can't initialize unknown declaration");
4254         }
4255         panic("invalid declaration kind");
4256 }
4257
4258 static void declaration_statement_to_firm(declaration_statement_t *statement)
4259 {
4260         declaration_t *declaration = statement->declarations_begin;
4261         declaration_t *end         = statement->declarations_end->next;
4262         for( ; declaration != end; declaration = declaration->next) {
4263                 if (declaration->namespc != NAMESPACE_NORMAL)
4264                         continue;
4265                 initialize_local_declaration(declaration);
4266         }
4267 }
4268
4269 static void if_statement_to_firm(if_statement_t *statement)
4270 {
4271         ir_node *cur_block = get_cur_block();
4272
4273         ir_node *fallthrough_block = NULL;
4274
4275         /* the true (blocks) */
4276         ir_node *true_block = NULL;
4277         if (statement->true_statement != NULL) {
4278                 true_block = new_immBlock();
4279                 statement_to_firm(statement->true_statement);
4280                 if (get_cur_block() != NULL) {
4281                         ir_node *jmp = new_Jmp();
4282                         if (fallthrough_block == NULL)
4283                                 fallthrough_block = new_immBlock();
4284                         add_immBlock_pred(fallthrough_block, jmp);
4285                 }
4286         }
4287
4288         /* the false (blocks) */
4289         ir_node *false_block = NULL;
4290         if (statement->false_statement != NULL) {
4291                 false_block = new_immBlock();
4292
4293                 statement_to_firm(statement->false_statement);
4294                 if (get_cur_block() != NULL) {
4295                         ir_node *jmp = new_Jmp();
4296                         if (fallthrough_block == NULL)
4297                                 fallthrough_block = new_immBlock();
4298                         add_immBlock_pred(fallthrough_block, jmp);
4299                 }
4300         }
4301
4302         /* create the condition */
4303         if (cur_block != NULL) {
4304                 if (true_block == NULL || false_block == NULL) {
4305                         if (fallthrough_block == NULL)
4306                                 fallthrough_block = new_immBlock();
4307                         if (true_block == NULL)
4308                                 true_block = fallthrough_block;
4309                         if (false_block == NULL)
4310                                 false_block = fallthrough_block;
4311                 }
4312
4313                 set_cur_block(cur_block);
4314                 create_condition_evaluation(statement->condition, true_block,
4315                                             false_block);
4316         }
4317
4318         mature_immBlock(true_block);
4319         if (false_block != fallthrough_block && false_block != NULL) {
4320                 mature_immBlock(false_block);
4321         }
4322         if (fallthrough_block != NULL) {
4323                 mature_immBlock(fallthrough_block);
4324         }
4325
4326         set_cur_block(fallthrough_block);
4327 }
4328
4329 static void while_statement_to_firm(while_statement_t *statement)
4330 {
4331         ir_node *jmp = NULL;
4332         if (get_cur_block() != NULL) {
4333                 jmp = new_Jmp();
4334         }
4335
4336         /* create the header block */
4337         ir_node *header_block = new_immBlock();
4338         if (jmp != NULL) {
4339                 add_immBlock_pred(header_block, jmp);
4340         }
4341
4342         /* the loop body */
4343         ir_node *old_continue_label = continue_label;
4344         ir_node *old_break_label    = break_label;
4345         continue_label              = header_block;
4346         break_label                 = NULL;
4347
4348         ir_node *body_block = new_immBlock();
4349         statement_to_firm(statement->body);
4350         ir_node *false_block = break_label;
4351
4352         assert(continue_label == header_block);
4353         continue_label = old_continue_label;
4354         break_label    = old_break_label;
4355
4356         if (get_cur_block() != NULL) {
4357                 jmp = new_Jmp();
4358                 add_immBlock_pred(header_block, jmp);
4359         }
4360
4361         /* shortcut for while(true) */
4362         if (is_constant_expression(statement->condition)
4363                         && fold_constant(statement->condition) != 0) {
4364                 set_cur_block(header_block);
4365                 ir_node *header_jmp = new_Jmp();
4366                 add_immBlock_pred(body_block, header_jmp);
4367
4368                 keep_alive(body_block);
4369                 keep_all_memory(body_block);
4370                 set_cur_block(body_block);
4371         } else {
4372                 if (false_block == NULL) {
4373                         false_block = new_immBlock();
4374                 }
4375
4376                 /* create the condition */
4377                 set_cur_block(header_block);
4378
4379                 create_condition_evaluation(statement->condition, body_block,
4380                                             false_block);
4381         }
4382
4383         mature_immBlock(body_block);
4384         mature_immBlock(header_block);
4385         if (false_block != NULL) {
4386                 mature_immBlock(false_block);
4387         }
4388
4389         set_cur_block(false_block);
4390 }
4391
4392 static void do_while_statement_to_firm(do_while_statement_t *statement)
4393 {
4394         ir_node *jmp = NULL;
4395         if (get_cur_block() != NULL) {
4396                 jmp = new_Jmp();
4397         }
4398
4399         /* create the header block */
4400         ir_node *header_block = new_immBlock();
4401
4402         /* the loop body */
4403         ir_node *body_block = new_immBlock();
4404         if (jmp != NULL) {
4405                 add_immBlock_pred(body_block, jmp);
4406         }
4407
4408         ir_node *old_continue_label = continue_label;
4409         ir_node *old_break_label    = break_label;
4410         continue_label              = header_block;
4411         break_label                 = NULL;
4412
4413         statement_to_firm(statement->body);
4414         ir_node *false_block = break_label;
4415
4416         assert(continue_label == header_block);
4417         continue_label = old_continue_label;
4418         break_label    = old_break_label;
4419
4420         if (get_cur_block() != NULL) {
4421                 ir_node *body_jmp = new_Jmp();
4422                 add_immBlock_pred(header_block, body_jmp);
4423                 mature_immBlock(header_block);
4424         }
4425
4426         if (false_block == NULL) {
4427                 false_block = new_immBlock();
4428         }
4429
4430         /* create the condition */
4431         set_cur_block(header_block);
4432
4433         create_condition_evaluation(statement->condition, body_block, false_block);
4434         mature_immBlock(body_block);
4435         mature_immBlock(header_block);
4436         if (false_block != NULL) {
4437                 mature_immBlock(false_block);
4438         }
4439
4440         set_cur_block(false_block);
4441 }
4442
4443 static void for_statement_to_firm(for_statement_t *statement)
4444 {
4445         ir_node *jmp = NULL;
4446
4447         /* create declarations */
4448         declaration_t *declaration = statement->scope.declarations;
4449         for( ; declaration != NULL; declaration = declaration->next) {
4450                 create_local_declaration(declaration);
4451         }
4452
4453         if (get_cur_block() != NULL) {
4454                 declaration = statement->scope.declarations;
4455                 for( ; declaration != NULL; declaration = declaration->next) {
4456                         initialize_local_declaration(declaration);
4457                 }
4458
4459                 if (statement->initialisation != NULL) {
4460                         expression_to_firm(statement->initialisation);
4461                 }
4462
4463                 jmp = new_Jmp();
4464         }
4465
4466
4467         /* create the step block */
4468         ir_node *const step_block = new_immBlock();
4469         if (statement->step != NULL) {
4470                 expression_to_firm(statement->step);
4471         }
4472         ir_node *const step_jmp = new_Jmp();
4473
4474         /* create the header block */
4475         ir_node *const header_block = new_immBlock();
4476         if (jmp != NULL) {
4477                 add_immBlock_pred(header_block, jmp);
4478         }
4479         add_immBlock_pred(header_block, step_jmp);
4480
4481         /* the false block */
4482         ir_node *const false_block = new_immBlock();
4483
4484         /* the loop body */
4485         ir_node * body_block;
4486         if (statement->body != NULL) {
4487                 ir_node *const old_continue_label = continue_label;
4488                 ir_node *const old_break_label    = break_label;
4489                 continue_label = step_block;
4490                 break_label    = false_block;
4491
4492                 body_block = new_immBlock();
4493                 statement_to_firm(statement->body);
4494
4495                 assert(continue_label == step_block);
4496                 assert(break_label    == false_block);
4497                 continue_label = old_continue_label;
4498                 break_label    = old_break_label;
4499
4500                 if (get_cur_block() != NULL) {
4501                         jmp = new_Jmp();
4502                         add_immBlock_pred(step_block, jmp);
4503                 }
4504         } else {
4505                 body_block = step_block;
4506         }
4507
4508         /* create the condition */
4509         set_cur_block(header_block);
4510         if (statement->condition != NULL) {
4511                 create_condition_evaluation(statement->condition, body_block,
4512                                             false_block);
4513         } else {
4514                 keep_alive(header_block);
4515                 keep_all_memory(header_block);
4516                 jmp = new_Jmp();
4517                 add_immBlock_pred(body_block, jmp);
4518         }
4519
4520         mature_immBlock(body_block);
4521         mature_immBlock(false_block);
4522         mature_immBlock(step_block);
4523         mature_immBlock(header_block);
4524         mature_immBlock(false_block);
4525
4526         set_cur_block(false_block);
4527 }
4528
4529 static void create_jump_statement(const statement_t *statement,
4530                                   ir_node *target_block)
4531 {
4532         if (get_cur_block() == NULL)
4533                 return;
4534
4535         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4536         ir_node  *jump = new_d_Jmp(dbgi);
4537         add_immBlock_pred(target_block, jump);
4538
4539         set_cur_block(NULL);
4540 }
4541
4542 static ir_node *get_break_label(void)
4543 {
4544         if (break_label == NULL) {
4545                 ir_node *cur_block = get_cur_block();
4546                 break_label = new_immBlock();
4547                 set_cur_block(cur_block);
4548         }
4549         return break_label;
4550 }
4551
4552 static void switch_statement_to_firm(switch_statement_t *statement)
4553 {
4554         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4555
4556         ir_node *expression  = expression_to_firm(statement->expression);
4557         ir_node *cond        = new_d_Cond(dbgi, expression);
4558
4559         set_cur_block(NULL);
4560
4561         ir_node *const old_switch_cond       = current_switch_cond;
4562         ir_node *const old_break_label       = break_label;
4563         const bool     old_saw_default_label = saw_default_label;
4564         saw_default_label                    = false;
4565         current_switch_cond                  = cond;
4566         break_label                          = NULL;
4567         switch_statement_t *const old_switch = current_switch;
4568         current_switch                       = statement;
4569
4570         /* determine a free number for the default label */
4571         unsigned long num_cases = 0;
4572         long def_nr = 0;
4573         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4574                 if (l->expression == NULL) {
4575                         /* default case */
4576                         continue;
4577                 }
4578                 if (l->last_case >= l->first_case)
4579                         num_cases += l->last_case - l->first_case + 1;
4580                 if (l->last_case > def_nr)
4581                         def_nr = l->last_case;
4582         }
4583
4584         if (def_nr + 1 < 0) {
4585                 /* Bad: an overflow occurred, we cannot be sure that the
4586          * maximum + 1 is a free number. Scan the values a second
4587          * time to find a free number.
4588          */
4589                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4590                 unsigned long i;
4591
4592                 memset(bits, 0, (num_cases + 7) >> 3);
4593                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4594                         if (l->expression == NULL) {
4595                                 /* default case */
4596                                 continue;
4597                         }
4598                         if (l->first_case < num_cases && l->last_case >= 0) {
4599                                 long start = l->first_case > 0 ? l->first_case : 0;
4600                                 long end   = (unsigned long)l->last_case < num_cases ?
4601                                         l->last_case : num_cases - 1;
4602                                 for (long cns = start; cns <= end; ++cns) {
4603                                         bits[cns >> 3] |= (1 << (cns & 7));
4604                                 }
4605                         }
4606                 }
4607                 /* We look at the first num_cases constants:
4608                  * Either they are densed, so we took the last (num_cases)
4609                  * one, or they are non densed, so we will find one free
4610                  * there...
4611                  */
4612                 for (i = 0; i < num_cases; ++i)
4613                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4614                                 break;
4615
4616                 free(bits);
4617                 def_nr = i;
4618         } else {
4619                 ++def_nr;
4620         }
4621         statement->default_proj_nr = def_nr;
4622
4623         if (statement->body != NULL) {
4624                 statement_to_firm(statement->body);
4625         }
4626
4627         if (get_cur_block() != NULL) {
4628                 ir_node *jmp = new_Jmp();
4629                 add_immBlock_pred(get_break_label(), jmp);
4630         }
4631
4632         if (!saw_default_label) {
4633                 set_cur_block(get_nodes_block(cond));
4634                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4635                                                         statement->default_proj_nr);
4636                 add_immBlock_pred(get_break_label(), proj);
4637         }
4638
4639         if (break_label != NULL) {
4640                 mature_immBlock(break_label);
4641         }
4642         set_cur_block(break_label);
4643
4644         assert(current_switch_cond == cond);
4645         current_switch      = old_switch;
4646         current_switch_cond = old_switch_cond;
4647         break_label         = old_break_label;
4648         saw_default_label   = old_saw_default_label;
4649 }
4650
4651 static void case_label_to_firm(const case_label_statement_t *statement)
4652 {
4653         if (statement->is_empty_range)
4654                 return;
4655
4656         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4657
4658         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4659
4660         ir_node *proj;
4661         ir_node *old_block = get_nodes_block(current_switch_cond);
4662         ir_node *block     = new_immBlock();
4663
4664         set_cur_block(old_block);
4665         if (statement->expression != NULL) {
4666                 long pn     = statement->first_case;
4667                 long end_pn = statement->last_case;
4668                 assert(pn <= end_pn);
4669                 /* create jumps for all cases in the given range */
4670                 do {
4671                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4672                         add_immBlock_pred(block, proj);
4673                 } while(pn++ < end_pn);
4674         } else {
4675                 saw_default_label = true;
4676                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4677                                          current_switch->default_proj_nr);
4678
4679                 add_immBlock_pred(block, proj);
4680         }
4681
4682         if (fallthrough != NULL) {
4683                 add_immBlock_pred(block, fallthrough);
4684         }
4685         mature_immBlock(block);
4686         set_cur_block(block);
4687
4688         if (statement->statement != NULL) {
4689                 statement_to_firm(statement->statement);
4690         }
4691 }
4692
4693 static void label_to_firm(const label_statement_t *statement)
4694 {
4695         ir_node *block = get_label_block(statement->label);
4696
4697         if (get_cur_block() != NULL) {
4698                 ir_node *jmp = new_Jmp();
4699                 add_immBlock_pred(block, jmp);
4700         }
4701
4702         set_cur_block(block);
4703         keep_alive(block);
4704         keep_all_memory(block);
4705
4706         if (statement->statement != NULL) {
4707                 statement_to_firm(statement->statement);
4708         }
4709 }
4710
4711 static void goto_to_firm(const goto_statement_t *statement)
4712 {
4713         if (get_cur_block() == NULL)
4714                 return;
4715
4716         if (statement->expression) {
4717                 ir_node  *irn  = expression_to_firm(statement->expression);
4718                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4719                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4720
4721                 set_irn_link(ijmp, ijmp_list);
4722                 ijmp_list = ijmp;
4723         } else {
4724                 ir_node *block = get_label_block(statement->label);
4725                 ir_node *jmp   = new_Jmp();
4726                 add_immBlock_pred(block, jmp);
4727         }
4728         set_cur_block(NULL);
4729 }
4730
4731 static void asm_statement_to_firm(const asm_statement_t *statement)
4732 {
4733         bool needs_memory = false;
4734
4735         if (statement->is_volatile) {
4736                 needs_memory = true;
4737         }
4738
4739         size_t         n_clobbers = 0;
4740         asm_clobber_t *clobber    = statement->clobbers;
4741         for( ; clobber != NULL; clobber = clobber->next) {
4742                 const char *clobber_str = clobber->clobber.begin;
4743
4744                 if (!be_is_valid_clobber(clobber_str)) {
4745                         errorf(&statement->base.source_position,
4746                                    "invalid clobber '%s' specified", clobber->clobber);
4747                         continue;
4748                 }
4749
4750                 if (strcmp(clobber_str, "memory") == 0) {
4751                         needs_memory = true;
4752                         continue;
4753                 }
4754
4755                 ident *id = new_id_from_str(clobber_str);
4756                 obstack_ptr_grow(&asm_obst, id);
4757                 ++n_clobbers;
4758         }
4759         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4760         ident **clobbers = NULL;
4761         if (n_clobbers > 0) {
4762                 clobbers = obstack_finish(&asm_obst);
4763         }
4764
4765         size_t n_inputs  = 0;
4766         asm_argument_t *argument = statement->inputs;
4767         for ( ; argument != NULL; argument = argument->next)
4768                 n_inputs++;
4769         size_t n_outputs = 0;
4770         argument = statement->outputs;
4771         for ( ; argument != NULL; argument = argument->next)
4772                 n_outputs++;
4773
4774         unsigned next_pos = 0;
4775
4776         ir_node *ins[n_inputs + n_outputs + 1];
4777         size_t   in_size = 0;
4778
4779         ir_asm_constraint tmp_in_constraints[n_outputs];
4780
4781         const expression_t *out_exprs[n_outputs];
4782         ir_node            *out_addrs[n_outputs];
4783         size_t              out_size = 0;
4784
4785         argument = statement->outputs;
4786         for ( ; argument != NULL; argument = argument->next) {
4787                 const char *constraints = argument->constraints.begin;
4788                 asm_constraint_flags_t asm_flags
4789                         = be_parse_asm_constraints(constraints);
4790
4791                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4792                         errorf(&statement->base.source_position,
4793                                "some constraints in '%s' are not supported", constraints);
4794                         continue;
4795                 }
4796                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4797                         errorf(&statement->base.source_position,
4798                                "some constraints in '%s' are invalid", constraints);
4799                         continue;
4800                 }
4801                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4802                         errorf(&statement->base.source_position,
4803                                "no write flag specified for output constraints '%s'",
4804                                constraints);
4805                         continue;
4806                 }
4807
4808                 unsigned pos = next_pos++;
4809                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4810                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4811                         expression_t *expr = argument->expression;
4812                         ir_node      *addr = expression_to_addr(expr);
4813                         /* in+output, construct an artifical same_as constraint on the
4814                          * input */
4815                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4816                                 char     buf[64];
4817                                 ir_node *value = get_value_from_lvalue(expr, addr);
4818
4819                                 snprintf(buf, sizeof(buf), "%u", pos);
4820
4821                                 ir_asm_constraint constraint;
4822                                 constraint.pos              = pos;
4823                                 constraint.constraint       = new_id_from_str(buf);
4824                                 constraint.mode             = get_ir_mode(expr->base.type);
4825                                 tmp_in_constraints[in_size] = constraint;
4826                                 ins[in_size] = value;
4827
4828                                 ++in_size;
4829                         }
4830
4831                         out_exprs[out_size] = expr;
4832                         out_addrs[out_size] = addr;
4833                         ++out_size;
4834                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4835                         /* pure memory ops need no input (but we have to make sure we
4836                          * attach to the memory) */
4837                         assert(! (asm_flags &
4838                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4839                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4840                         needs_memory = true;
4841
4842                         /* we need to attach the address to the inputs */
4843                         expression_t *expr = argument->expression;
4844
4845                         ir_asm_constraint constraint;
4846                         constraint.pos              = pos;
4847                         constraint.constraint       = new_id_from_str(constraints);
4848                         constraint.mode             = NULL;
4849                         tmp_in_constraints[in_size] = constraint;
4850
4851                         ins[in_size]          = expression_to_addr(expr);
4852                         ++in_size;
4853                         continue;
4854                 } else {
4855                         errorf(&statement->base.source_position,
4856                                "only modifiers but no place set in constraints '%s'",
4857                                constraints);
4858                         continue;
4859                 }
4860
4861                 ir_asm_constraint constraint;
4862                 constraint.pos        = pos;
4863                 constraint.constraint = new_id_from_str(constraints);
4864                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4865
4866                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4867         }
4868         assert(obstack_object_size(&asm_obst)
4869                         == out_size * sizeof(ir_asm_constraint));
4870         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4871
4872
4873         obstack_grow(&asm_obst, tmp_in_constraints,
4874                      in_size * sizeof(tmp_in_constraints[0]));
4875         /* find and count input and output arguments */
4876         argument = statement->inputs;
4877         for( ; argument != NULL; argument = argument->next) {
4878                 const char *constraints = argument->constraints.begin;
4879                 asm_constraint_flags_t asm_flags
4880                         = be_parse_asm_constraints(constraints);
4881
4882                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4883                         errorf(&statement->base.source_position,
4884                                "some constraints in '%s' are not supported", constraints);
4885                         continue;
4886                 }
4887                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4888                         errorf(&statement->base.source_position,
4889                                "some constraints in '%s' are invalid", constraints);
4890                         continue;
4891                 }
4892                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4893                         errorf(&statement->base.source_position,
4894                                "write flag specified for input constraints '%s'",
4895                                constraints);
4896                         continue;
4897                 }
4898
4899                 ir_node *input;
4900                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4901                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4902                         /* we can treat this as "normal" input */
4903                         input = expression_to_firm(argument->expression);
4904                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4905                         /* pure memory ops need no input (but we have to make sure we
4906                          * attach to the memory) */
4907                         assert(! (asm_flags &
4908                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4909                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4910                         needs_memory = true;
4911                         input = expression_to_addr(argument->expression);
4912                 } else {
4913                         errorf(&statement->base.source_position,
4914                                "only modifiers but no place set in constraints '%s'",
4915                                constraints);
4916                         continue;
4917                 }
4918
4919                 ir_asm_constraint constraint;
4920                 constraint.pos        = next_pos++;
4921                 constraint.constraint = new_id_from_str(constraints);
4922                 constraint.mode       = get_irn_mode(input);
4923
4924                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4925                 ins[in_size++] = input;
4926         }
4927
4928         if (needs_memory) {
4929                 ir_asm_constraint constraint;
4930                 constraint.pos        = next_pos++;
4931                 constraint.constraint = new_id_from_str("");
4932                 constraint.mode       = mode_M;
4933
4934                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4935                 ins[in_size++] = get_store();
4936         }
4937
4938         assert(obstack_object_size(&asm_obst)
4939                         == in_size * sizeof(ir_asm_constraint));
4940         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4941
4942         /* create asm node */
4943         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4944
4945         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4946
4947         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4948                                   out_size, output_constraints,
4949                                   n_clobbers, clobbers, asm_text);
4950
4951         if (statement->is_volatile) {
4952                 set_irn_pinned(node, op_pin_state_pinned);
4953         } else {
4954                 set_irn_pinned(node, op_pin_state_floats);
4955         }
4956
4957         /* create output projs & connect them */
4958         if (needs_memory) {
4959                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4960                 set_store(projm);
4961         }
4962
4963         size_t i;
4964         for (i = 0; i < out_size; ++i) {
4965                 const expression_t *out_expr = out_exprs[i];
4966                 long                pn       = i;
4967                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4968                 ir_node            *proj     = new_Proj(node, mode, pn);
4969                 ir_node            *addr     = out_addrs[i];
4970
4971                 set_value_for_expression_addr(out_expr, proj, addr);
4972         }
4973 }
4974
4975 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4976         statement_to_firm(statement->try_statement);
4977         warningf(&statement->base.source_position, "structured exception handling ignored");
4978 }
4979
4980 static void     leave_statement_to_firm(leave_statement_t *statement) {
4981         errorf(&statement->base.source_position, "__leave not supported yet");
4982 }
4983
4984 /**
4985  * Transform a statement.
4986  */
4987 static void statement_to_firm(statement_t *statement)
4988 {
4989 #ifndef NDEBUG
4990         assert(!statement->base.transformed);
4991         statement->base.transformed = true;
4992 #endif
4993
4994         switch(statement->kind) {
4995         case STATEMENT_INVALID:
4996                 panic("invalid statement found");
4997                 return;
4998         case STATEMENT_EMPTY:
4999                 /* nothing */
5000                 return;
5001         case STATEMENT_COMPOUND:
5002                 compound_statement_to_firm(&statement->compound);
5003                 return;
5004         case STATEMENT_RETURN:
5005                 return_statement_to_firm(&statement->returns);
5006                 return;
5007         case STATEMENT_EXPRESSION:
5008                 expression_statement_to_firm(&statement->expression);
5009                 return;
5010         case STATEMENT_IF:
5011                 if_statement_to_firm(&statement->ifs);
5012                 return;
5013         case STATEMENT_WHILE:
5014                 while_statement_to_firm(&statement->whiles);
5015                 return;
5016         case STATEMENT_DO_WHILE:
5017                 do_while_statement_to_firm(&statement->do_while);
5018                 return;
5019         case STATEMENT_DECLARATION:
5020                 declaration_statement_to_firm(&statement->declaration);
5021                 return;
5022         case STATEMENT_BREAK:
5023                 create_jump_statement(statement, get_break_label());
5024                 return;
5025         case STATEMENT_CONTINUE:
5026                 create_jump_statement(statement, continue_label);
5027                 return;
5028         case STATEMENT_SWITCH:
5029                 switch_statement_to_firm(&statement->switchs);
5030                 return;
5031         case STATEMENT_CASE_LABEL:
5032                 case_label_to_firm(&statement->case_label);
5033                 return;
5034         case STATEMENT_FOR:
5035                 for_statement_to_firm(&statement->fors);
5036                 return;
5037         case STATEMENT_LABEL:
5038                 label_to_firm(&statement->label);
5039                 return;
5040         case STATEMENT_GOTO:
5041                 goto_to_firm(&statement->gotos);
5042                 return;
5043         case STATEMENT_ASM:
5044                 asm_statement_to_firm(&statement->asms);
5045                 return;
5046         case STATEMENT_MS_TRY:
5047                 ms_try_statement_to_firm(&statement->ms_try);
5048                 return;
5049         case STATEMENT_LEAVE:
5050                 leave_statement_to_firm(&statement->leave);
5051                 return;
5052         }
5053         panic("Statement not implemented\n");
5054 }
5055
5056 static int count_local_declarations(const declaration_t *      decl,
5057                                     const declaration_t *const end)
5058 {
5059         int count = 0;
5060         for (; decl != end; decl = decl->next) {
5061                 if (decl->namespc != NAMESPACE_NORMAL)
5062                         continue;
5063                 type_t *type = skip_typeref(decl->type);
5064
5065                 if (!decl->address_taken && is_type_scalar(type))
5066                         ++count;
5067         }
5068         return count;
5069 }
5070
5071 static void count_decls_in_stmt(statement_t *stmt, void *const env)
5072 {
5073         int *const count = env;
5074
5075         switch (stmt->kind) {
5076                 case STATEMENT_DECLARATION: {
5077                         const declaration_statement_t *const decl_stmt = &stmt->declaration;
5078                         *count += count_local_declarations(decl_stmt->declarations_begin,
5079                                                                                                                                                                  decl_stmt->declarations_end->next);
5080                         break;
5081                 }
5082
5083                 case STATEMENT_FOR:
5084                         *count += count_local_declarations(stmt->fors.scope.declarations, NULL);
5085                         break;
5086
5087                 default:
5088                         break;
5089         }
5090 }
5091
5092 static int get_function_n_local_vars(declaration_t *declaration)
5093 {
5094         int count = 0;
5095
5096         /* count parameters */
5097         count += count_local_declarations(declaration->scope.declarations, NULL);
5098
5099         /* count local variables declared in body */
5100         walk_statements(declaration->init.statement, count_decls_in_stmt, &count);
5101         return count;
5102 }
5103
5104 static void initialize_function_parameters(declaration_t *declaration)
5105 {
5106         ir_graph        *irg             = current_ir_graph;
5107         ir_node         *args            = get_irg_args(irg);
5108         ir_node         *start_block     = get_irg_start_block(irg);
5109         ir_type         *function_irtype = get_ir_type(declaration->type);
5110
5111         int            n         = 0;
5112         declaration_t *parameter = declaration->scope.declarations;
5113         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5114                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5115                 type_t *type = skip_typeref(parameter->type);
5116
5117                 bool needs_entity = parameter->address_taken;
5118                 assert(!is_type_array(type));
5119                 if (is_type_compound(type)) {
5120                         needs_entity = true;
5121                 }
5122
5123                 if (needs_entity) {
5124                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5125                         ident     *id     = new_id_from_str(parameter->symbol->string);
5126                         set_entity_ident(entity, id);
5127
5128                         parameter->declaration_kind
5129                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5130                         parameter->v.entity = entity;
5131                         continue;
5132                 }
5133
5134                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5135                 ir_mode *param_mode   = get_type_mode(param_irtype);
5136
5137                 long     pn    = n;
5138                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5139
5140                 ir_mode *mode = get_ir_mode(type);
5141                 value = create_conv(NULL, value, mode);
5142                 value = do_strict_conv(NULL, value);
5143
5144                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5145                 parameter->v.value_number   = next_value_number_function;
5146                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5147                 ++next_value_number_function;
5148
5149                 set_value(parameter->v.value_number, value);
5150         }
5151 }
5152
5153 /**
5154  * Handle additional decl modifiers for IR-graphs
5155  *
5156  * @param irg            the IR-graph
5157  * @param dec_modifiers  additional modifiers
5158  */
5159 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5160 {
5161         if (decl_modifiers & DM_NORETURN) {
5162                 /* TRUE if the declaration includes the Microsoft
5163                    __declspec(noreturn) specifier. */
5164                 set_irg_additional_property(irg, mtp_property_noreturn);
5165         }
5166         if (decl_modifiers & DM_NOTHROW) {
5167                 /* TRUE if the declaration includes the Microsoft
5168                    __declspec(nothrow) specifier. */
5169                 set_irg_additional_property(irg, mtp_property_nothrow);
5170         }
5171         if (decl_modifiers & DM_NAKED) {
5172                 /* TRUE if the declaration includes the Microsoft
5173                    __declspec(naked) specifier. */
5174                 set_irg_additional_property(irg, mtp_property_naked);
5175         }
5176         if (decl_modifiers & DM_FORCEINLINE) {
5177                 /* TRUE if the declaration includes the
5178                    Microsoft __forceinline specifier. */
5179                 set_irg_inline_property(irg, irg_inline_forced);
5180         }
5181         if (decl_modifiers & DM_NOINLINE) {
5182                 /* TRUE if the declaration includes the Microsoft
5183                    __declspec(noinline) specifier. */
5184                 set_irg_inline_property(irg, irg_inline_forbidden);
5185         }
5186 }
5187
5188 static void add_function_pointer(ir_type *segment, ir_entity *method,
5189                                  const char *unique_template)
5190 {
5191         ir_type   *method_type  = get_entity_type(method);
5192         ident     *id           = id_unique(unique_template);
5193         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5194
5195         ident     *ide          = id_unique(unique_template);
5196         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5197         ir_graph  *irg          = get_const_code_irg();
5198         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5199                                                            method, NULL);
5200
5201         set_entity_compiler_generated(ptr, 1);
5202         set_entity_variability(ptr, variability_constant);
5203         set_atomic_ent_value(ptr, val);
5204 }
5205
5206 /**
5207  * Generate possible IJmp branches to a given label block.
5208  */
5209 static void gen_ijmp_branches(ir_node *block) {
5210         ir_node *ijmp;
5211         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5212                 add_immBlock_pred(block, ijmp);
5213         }
5214 }
5215
5216 /**
5217  * Create code for a function.
5218  */
5219 static void create_function(declaration_t *declaration)
5220 {
5221         ir_entity *function_entity = get_function_entity(declaration);
5222
5223         if (declaration->init.statement == NULL)
5224                 return;
5225
5226         if (declaration->modifiers & DM_CONSTRUCTOR) {
5227                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5228                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5229         }
5230         if (declaration->modifiers & DM_DESTRUCTOR) {
5231                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5232                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5233         }
5234
5235         current_function_decl = declaration;
5236         current_function_name = NULL;
5237         current_funcsig       = NULL;
5238
5239         assert(all_labels == NULL);
5240         all_labels = NEW_ARR_F(declaration_t *, 0);
5241         ijmp_list  = NULL;
5242
5243         int       n_local_vars = get_function_n_local_vars(declaration);
5244         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5245
5246         ir_graph *old_current_function = current_function;
5247         current_function = irg;
5248
5249         set_irg_fp_model(irg, firm_opt.fp_model);
5250         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5251         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5252
5253         ir_node *first_block = get_cur_block();
5254
5255         /* set inline flags */
5256         if (declaration->is_inline)
5257                 set_irg_inline_property(irg, irg_inline_recomended);
5258         handle_decl_modifier_irg(irg, declaration->modifiers);
5259
5260         next_value_number_function = 0;
5261         initialize_function_parameters(declaration);
5262
5263         statement_to_firm(declaration->init.statement);
5264
5265         ir_node *end_block = get_irg_end_block(irg);
5266
5267         /* do we have a return statement yet? */
5268         if (get_cur_block() != NULL) {
5269                 type_t *type = skip_typeref(declaration->type);
5270                 assert(is_type_function(type));
5271                 const function_type_t *func_type   = &type->function;
5272                 const type_t          *return_type
5273                         = skip_typeref(func_type->return_type);
5274
5275                 ir_node *ret;
5276                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5277                         ret = new_Return(get_store(), 0, NULL);
5278                 } else {
5279                         ir_mode *mode;
5280                         if (is_type_scalar(return_type)) {
5281                                 mode = get_ir_mode(func_type->return_type);
5282                         } else {
5283                                 mode = mode_P_data;
5284                         }
5285
5286                         ir_node *in[1];
5287                         /* §5.1.2.2.3 main implicitly returns 0 */
5288                         if (strcmp(declaration->symbol->string, "main") == 0) {
5289                                 in[0] = new_Const(mode, get_mode_null(mode));
5290                         } else {
5291                                 in[0] = new_Unknown(mode);
5292                         }
5293                         ret = new_Return(get_store(), 1, in);
5294                 }
5295                 add_immBlock_pred(end_block, ret);
5296         }
5297
5298         bool has_computed_gotos = false;
5299         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5300                 declaration_t *label = all_labels[i];
5301                 if (label->address_taken) {
5302                         gen_ijmp_branches(label->v.block);
5303                         has_computed_gotos = true;
5304                 }
5305                 mature_immBlock(label->v.block);
5306         }
5307         if (has_computed_gotos) {
5308                 /* if we have computed goto's in the function, we cannot inline it */
5309                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5310                         warningf(&declaration->source_position,
5311                                 "function '%Y' can never be inlined because it contains a computed goto",
5312                                 declaration->symbol);
5313                 }
5314                 set_irg_inline_property(irg, irg_inline_forbidden);
5315         }
5316
5317         DEL_ARR_F(all_labels);
5318         all_labels = NULL;
5319
5320         mature_immBlock(first_block);
5321         mature_immBlock(end_block);
5322
5323         irg_finalize_cons(irg);
5324
5325         /* finalize the frame type */
5326         ir_type *frame_type = get_irg_frame_type(irg);
5327         int      n          = get_compound_n_members(frame_type);
5328         int      align_all  = 4;
5329         int      offset     = 0;
5330         for(int i = 0; i < n; ++i) {
5331                 ir_entity *entity      = get_compound_member(frame_type, i);
5332                 ir_type   *entity_type = get_entity_type(entity);
5333
5334                 int align = get_type_alignment_bytes(entity_type);
5335                 if (align > align_all)
5336                         align_all = align;
5337                 int misalign = 0;
5338                 if (align > 0) {
5339                         misalign  = offset % align;
5340                         if (misalign > 0) {
5341                                 offset += align - misalign;
5342                         }
5343                 }
5344
5345                 set_entity_offset(entity, offset);
5346                 offset += get_type_size_bytes(entity_type);
5347         }
5348         set_type_size_bytes(frame_type, offset);
5349         set_type_alignment_bytes(frame_type, align_all);
5350
5351         irg_vrfy(irg);
5352         current_function = old_current_function;
5353 }
5354
5355 static void scope_to_firm(scope_t *scope)
5356 {
5357         /* first pass: create declarations */
5358         declaration_t *declaration = scope->declarations;
5359         for( ; declaration != NULL; declaration = declaration->next) {
5360                 if (declaration->namespc != NAMESPACE_NORMAL)
5361                         continue;
5362                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5363                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5364                         continue;
5365                 if (declaration->symbol == NULL)
5366                         continue;
5367
5368                 type_t *type = skip_typeref(declaration->type);
5369                 if (is_type_function(type)) {
5370                         get_function_entity(declaration);
5371                 } else {
5372                         create_global_variable(declaration);
5373                 }
5374         }
5375
5376         /* second pass: create code/initializers */
5377         declaration = scope->declarations;
5378         for( ; declaration != NULL; declaration = declaration->next) {
5379                 if (declaration->namespc != NAMESPACE_NORMAL)
5380                         continue;
5381                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5382                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5383                         continue;
5384                 if (declaration->symbol == NULL)
5385                         continue;
5386
5387                 type_t *type = declaration->type;
5388                 if (type->kind == TYPE_FUNCTION) {
5389                         create_function(declaration);
5390                         declaration_t *inner;
5391                         for (inner = next_inner_function(); inner != NULL;
5392                              inner = next_inner_function())
5393                                  create_function(inner);
5394                 } else {
5395                         assert(declaration->declaration_kind
5396                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5397                         current_ir_graph = get_const_code_irg();
5398                         create_declaration_initializer(declaration);
5399                 }
5400         }
5401 }
5402
5403 static void set_be_option(const char *option)
5404 {
5405         int res = firm_be_option(option);
5406         assert(res);
5407 }
5408
5409 void init_ast2firm(void)
5410 {
5411         obstack_init(&asm_obst);
5412         init_atomic_modes();
5413
5414         id_underscore = new_id_from_chars("_", 1);
5415         id_imp        = new_id_from_chars("__imp_", 6);
5416
5417         /* OS option must be set to the backend */
5418         switch (firm_opt.os_support) {
5419         case OS_SUPPORT_MINGW:
5420                 create_ld_ident = create_ld_ident_win32;
5421                 set_be_option("ia32-gasmode=mingw");
5422                 break;
5423         case OS_SUPPORT_LINUX:
5424                 create_ld_ident = create_ld_ident_linux_elf;
5425                 set_be_option("ia32-gasmode=elf");
5426                 break;
5427         case OS_SUPPORT_MACHO:
5428                 create_ld_ident = create_ld_ident_macho;
5429                 set_be_option("ia32-gasmode=macho");
5430                 set_be_option("ia32-stackalign=4");
5431                 set_be_option("pic");
5432                 break;
5433         }
5434
5435         /* create idents for all known runtime functions */
5436         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5437                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5438         }
5439
5440         entitymap_init(&entitymap);
5441 }
5442
5443 static void init_ir_types(void)
5444 {
5445         static int ir_types_initialized = 0;
5446         if (ir_types_initialized)
5447                 return;
5448         ir_types_initialized = 1;
5449
5450         ir_type_int        = get_ir_type(type_int);
5451         ir_type_const_char = get_ir_type(type_const_char);
5452         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5453         ir_type_void       = get_ir_type(type_void);
5454 }
5455
5456 void exit_ast2firm(void)
5457 {
5458         entitymap_destroy(&entitymap);
5459         obstack_free(&asm_obst, NULL);
5460 }
5461
5462 static void global_asm_to_firm(statement_t *s)
5463 {
5464         for (; s != NULL; s = s->base.next) {
5465                 assert(s->kind == STATEMENT_ASM);
5466
5467                 char const *const text = s->asms.asm_text.begin;
5468                 size_t            size = s->asms.asm_text.size;
5469
5470                 /* skip the last \0 */
5471                 if (text[size - 1] == '\0')
5472                         --size;
5473
5474                 ident *const id = new_id_from_chars(text, size);
5475                 add_irp_asm(id);
5476         }
5477 }
5478
5479 void translation_unit_to_firm(translation_unit_t *unit)
5480 {
5481         /* just to be sure */
5482         continue_label      = NULL;
5483         break_label         = NULL;
5484         current_switch_cond = NULL;
5485
5486         init_ir_types();
5487
5488         scope_to_firm(&unit->scope);
5489         global_asm_to_firm(unit->global_asm);
5490
5491         current_ir_graph = NULL;
5492 }