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
  29 #include "ast2firm.h"
  30
  31 #include "adt/error.h"
  32 #include "adt/array.h"
  33 #include "symbol_t.h"
  34 #include "token_t.h"
  35 #include "type_t.h"
  36 #include "ast_t.h"
  37 #include "parser.h"
  38 #include "diagnostic.h"
  39 #include "lang_features.h"
  40 #include "types.h"
  41 #include "driver/firm_opt.h"
  42 #include "driver/firm_cmdline.h"
  43
  44 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  45
  46 static ir_type *ir_type_const_char;
  47 static ir_type *ir_type_wchar_t;
  48 static ir_type *ir_type_void;
  49 static ir_type *ir_type_int;
  50
  51 static type_t *type_const_char;
  52
  53 static int       next_value_number_function;
  54 static ir_node  *continue_label;
  55 static ir_node  *break_label;
  56 static ir_node  *current_switch_cond;
  57 static bool      saw_default_label;
  58 static ir_node **imature_blocks;
  59
  60 static const declaration_t *current_function_decl;
  61 static ir_node             *current_function_name;
  62 static ir_node             *current_funcsig;
  63
  64 static struct obstack asm_obst;
  65
  66 typedef enum declaration_kind_t {
  67         DECLARATION_KIND_UNKNOWN,
  68         DECLARATION_KIND_FUNCTION,
  69         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  70         DECLARATION_KIND_GLOBAL_VARIABLE,
  71         DECLARATION_KIND_LOCAL_VARIABLE,
  72         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  73         DECLARATION_KIND_COMPOUND_MEMBER,
  74         DECLARATION_KIND_LABEL_BLOCK,
  75         DECLARATION_KIND_ENUM_ENTRY
  76 } declaration_kind_t;
  77
  78 static ir_type *get_ir_type(type_t *type);
  79 static int count_decls_in_stmts(const statement_t *stmt);
  80
  81 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  82 {
  83         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  84
  85         warningf(&declaration->source_position,
  86                  "variable '%#T' might be used uninitialized",
  87                  declaration->type, declaration->symbol);
  88         return new_r_Unknown(irg, mode);
  89 }
  90
  91 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  92 {
  93         const source_position_t *pos = (const source_position_t*) dbg;
  94         if(pos == NULL)
  95                 return 0;
  96         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  97                                    pos->linenr);
  98 }
  99
 100 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 101 {
 102         const source_position_t *pos = (const source_position_t*) dbg;
 103         if(pos == NULL)
 104                 return NULL;
 105         if(line != NULL)
 106                 *line = pos->linenr;
 107         return pos->input_name;
 108 }
 109
 110 static dbg_info *get_dbg_info(const source_position_t *pos)
 111 {
 112         return (dbg_info*) pos;
 113 }
 114
 115 static unsigned unique_id = 0;
 116
 117 static ident *unique_ident(const char *tag)
 118 {
 119         char buf[256];
 120
 121         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 122         unique_id++;
 123         return new_id_from_str(buf);
 124 }
 125
 126 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 127
 128 static ir_mode *mode_int, *mode_uint;
 129
 130 static ir_node *expression_to_firm(const expression_t *expression);
 131 static inline ir_mode *get_ir_mode(type_t *type);
 132
 133 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 134 {
 135         unsigned flags = get_atomic_type_flags(kind);
 136         unsigned size  = get_atomic_type_size(kind);
 137         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 138                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 139                 char            name[64];
 140                 mode_sort       sort;
 141                 unsigned        bit_size     = size * 8;
 142                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 143                 mode_arithmetic arithmetic;
 144                 unsigned        modulo_shift;
 145
 146                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 147                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 148                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 149                         sort         = irms_int_number;
 150                         arithmetic   = irma_twos_complement;
 151                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 152                 } else {
 153                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 154                         snprintf(name, sizeof(name), "f%d", bit_size);
 155                         sort         = irms_float_number;
 156                         arithmetic   = irma_ieee754;
 157                         modulo_shift = 0;
 158                 }
 159                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 160                                    modulo_shift);
 161         }
 162
 163         return NULL;
 164 }
 165
 166 /**
 167  * Initialises the atomic modes depending on the machine size.
 168  */
 169 static void init_atomic_modes(void)
 170 {
 171         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 172                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 173         }
 174         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 175         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 176
 177         /* there's no real void type in firm */
 178         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 179
 180         /* initialize pointer modes */
 181         char            name[64];
 182         mode_sort       sort         = irms_reference;
 183         unsigned        bit_size     = machine_size;
 184         bool            is_signed    = 0;
 185         mode_arithmetic arithmetic   = irma_twos_complement;
 186         unsigned        modulo_shift
 187                 = bit_size < machine_size ? machine_size : bit_size;
 188
 189         snprintf(name, sizeof(name), "p%d", machine_size);
 190         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 191                                         modulo_shift);
 192
 193         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 194         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 195
 196         /* Hmm, pointers should be machine size */
 197         set_modeP_data(ptr_mode);
 198         set_modeP_code(ptr_mode);
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type((type_t*) type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         assert(!type->is_vla);
 210         ir_type *irtype = get_ir_type((type_t*) type);
 211         return get_type_size_bytes(irtype);
 212 }
 213
 214
 215 static unsigned get_type_size_const(type_t *type)
 216 {
 217         type = skip_typeref(type);
 218
 219         switch(type->kind) {
 220         case TYPE_ERROR:
 221                 panic("error type occured");
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size(type->atomic.akind);
 224         case TYPE_COMPLEX:
 225                 return 2 * get_atomic_type_size(type->complex.akind);
 226         case TYPE_IMAGINARY:
 227                 return get_atomic_type_size(type->imaginary.akind);
 228         case TYPE_ENUM:
 229                 return get_mode_size_bytes(mode_int);
 230         case TYPE_COMPOUND_UNION:
 231         case TYPE_COMPOUND_STRUCT:
 232                 return get_compound_type_size(&type->compound);
 233         case TYPE_FUNCTION:
 234                 /* just a pointer to the function */
 235                 return get_mode_size_bytes(mode_P_code);
 236         case TYPE_POINTER:
 237                 return get_mode_size_bytes(mode_P_data);
 238         case TYPE_ARRAY:
 239                 return get_array_type_size(&type->array);
 240         case TYPE_BUILTIN:
 241                 return get_type_size_const(type->builtin.real_type);
 242         case TYPE_BITFIELD:
 243                 panic("type size of bitfield request");
 244         case TYPE_TYPEDEF:
 245         case TYPE_TYPEOF:
 246         case TYPE_INVALID:
 247                 break;
 248         }
 249         panic("Trying to determine size of invalid type");
 250 }
 251
 252 static ir_node *get_type_size(type_t *type)
 253 {
 254         type = skip_typeref(type);
 255
 256         if(is_type_array(type) && type->array.is_vla) {
 257                 ir_node *size_node = type->array.size_node;
 258                 if(size_node == NULL) {
 259                         size_node = expression_to_firm(type->array.size_expression);
 260                         assert(!is_Const(size_node));
 261                         type->array.size_node = size_node;
 262                 }
 263
 264                 ir_node *elem_size = get_type_size(type->array.element_type);
 265                 ir_mode *mode      = get_irn_mode(size_node);
 266                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 267                 return real_size;
 268         }
 269
 270         ir_mode *mode = get_ir_mode(type_size_t);
 271         symconst_symbol sym;
 272         sym.type_p = get_ir_type(type);
 273         return new_SymConst(mode, sym, symconst_type_size);
 274 }
 275
 276 static unsigned count_parameters(const function_type_t *function_type)
 277 {
 278         unsigned count = 0;
 279
 280         function_parameter_t *parameter = function_type->parameters;
 281         for ( ; parameter != NULL; parameter = parameter->next) {
 282                 ++count;
 283         }
 284
 285         return count;
 286 }
 287
 288 /**
 289  * Creates a Firm type for an atomic type
 290  */
 291 static ir_type *create_atomic_type(const atomic_type_t *type)
 292 {
 293         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 294         atomic_type_kind_t  kind      = type->akind;
 295         ir_mode            *mode      = _atomic_modes[kind];
 296         ident              *id        = get_mode_ident(mode);
 297         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 298
 299         set_type_alignment_bytes(irtype, type->base.alignment);
 300
 301         return irtype;
 302 }
 303
 304 /**
 305  * Creates a Firm type for a complex type
 306  */
 307 static ir_type *create_complex_type(const complex_type_t *type)
 308 {
 309         /*
 310         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 311         atomic_type_kind_t  kind      = type->akind;
 312         ir_mode            *mode      = _atomic_modes[kind];
 313         ident              *id        = get_mode_ident(mode);
 314         */
 315         (void)type;
 316
 317         /* FIXME: finish the array */
 318         return NULL;
 319 }
 320
 321 /**
 322  * Creates a Firm type for an imaginary type
 323  */
 324 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 325 {
 326         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 327         atomic_type_kind_t  kind      = type->akind;
 328         ir_mode            *mode      = _atomic_modes[kind];
 329         ident              *id        = get_mode_ident(mode);
 330         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 331
 332         set_type_alignment_bytes(irtype, type->base.alignment);
 333
 334         return irtype;
 335 }
 336
 337 static ir_type *create_method_type(const function_type_t *function_type)
 338 {
 339         type_t  *return_type  = function_type->return_type;
 340
 341         ident   *id           = unique_ident("functiontype");
 342         int      n_parameters = count_parameters(function_type);
 343         int      n_results    = return_type == type_void ? 0 : 1;
 344         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 345         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 346
 347         if(return_type != type_void) {
 348                 ir_type *restype = get_ir_type(return_type);
 349                 set_method_res_type(irtype, 0, restype);
 350         }
 351
 352         function_parameter_t *parameter = function_type->parameters;
 353         int                   n         = 0;
 354         for( ; parameter != NULL; parameter = parameter->next) {
 355                 ir_type *p_irtype = get_ir_type(parameter->type);
 356                 set_method_param_type(irtype, n, p_irtype);
 357                 ++n;
 358         }
 359
 360         if(function_type->variadic || function_type->unspecified_parameters) {
 361                 set_method_variadicity(irtype, variadicity_variadic);
 362         }
 363
 364         return irtype;
 365 }
 366
 367 static ir_type *create_pointer_type(pointer_type_t *type)
 368 {
 369         type_t  *points_to = type->points_to;
 370         ir_type *ir_points_to;
 371         /* Avoid endless recursion if the points_to type contains this poiner type
 372          * again (might be a struct). We therefore first create a void* pointer
 373          * and then set the real points_to type
 374          */
 375         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 376         ir_type  *ir_type = new_d_type_pointer(unique_ident("pointer"),
 377                                             ir_type_void, mode_P_data, dbgi);
 378         type->base.firm_type  = ir_type;
 379
 380         ir_points_to = get_ir_type(points_to);
 381         set_pointer_points_to_type(ir_type, ir_points_to);
 382
 383         return ir_type;
 384 }
 385
 386 static ir_type *create_array_type(array_type_t *type)
 387 {
 388         type_t  *element_type    = type->element_type;
 389         ir_type *ir_element_type = get_ir_type(element_type);
 390
 391         ident    *id      = unique_ident("array");
 392         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 393         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 394
 395         const int align = get_type_alignment_bytes(ir_element_type);
 396         set_type_alignment_bytes(ir_type, align);
 397
 398         if(type->size_constant) {
 399                 int n_elements = type->size;
 400
 401                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 402
 403                 size_t elemsize = get_type_size_bytes(ir_element_type);
 404                 if(elemsize % align > 0) {
 405                         elemsize += align - (elemsize % align);
 406                 }
 407                 set_type_size_bytes(ir_type, n_elements * elemsize);
 408         } else {
 409                 set_array_lower_bound_int(ir_type, 0, 0);
 410         }
 411         set_type_state(ir_type, layout_fixed);
 412
 413         return ir_type;
 414 }
 415
 416 /**
 417  * Return the signed integer type of size bits.
 418  *
 419  * @param size   the size
 420  */
 421 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 422                                                  unsigned size)
 423 {
 424         static ir_mode *s_modes[64 + 1] = {NULL, };
 425         ir_type *res;
 426         ir_mode *mode;
 427
 428         if (size <= 0 || size > 64)
 429                 return NULL;
 430
 431         mode = s_modes[size];
 432         if (mode == NULL) {
 433                 char name[32];
 434
 435                 snprintf(name, sizeof(name), "bf_I%u", size);
 436                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 437                                    size <= 32 ? 32 : size );
 438                 s_modes[size] = mode;
 439         }
 440
 441         char name[32];
 442         snprintf(name, sizeof(name), "I%u", size);
 443         ident *id = new_id_from_str(name);
 444         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 445         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 446         set_primitive_base_type(res, base_tp);
 447
 448         return res;
 449 }
 450
 451 /**
 452  * Return the unsigned integer type of size bits.
 453  *
 454  * @param size   the size
 455  */
 456 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 457                                                    unsigned size)
 458 {
 459         static ir_mode *u_modes[64 + 1] = {NULL, };
 460         ir_type *res;
 461         ir_mode *mode;
 462
 463         if (size <= 0 || size > 64)
 464                 return NULL;
 465
 466         mode = u_modes[size];
 467         if (mode == NULL) {
 468                 char name[32];
 469
 470                 snprintf(name, sizeof(name), "bf_U%u", size);
 471                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 472                                    size <= 32 ? 32 : size );
 473                 u_modes[size] = mode;
 474         }
 475
 476         char name[32];
 477
 478         snprintf(name, sizeof(name), "U%u", size);
 479         ident *id = new_id_from_str(name);
 480         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 481         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 482         set_primitive_base_type(res, base_tp);
 483
 484         return res;
 485 }
 486
 487 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 488 {
 489         type_t *base = skip_typeref(type->base_type);
 490         assert(base->kind == TYPE_ATOMIC);
 491         ir_type *irbase = get_ir_type(base);
 492
 493         unsigned size = fold_constant(type->size);
 494
 495         assert(!is_type_float(base));
 496         if(is_type_signed(base)) {
 497                 return get_signed_int_type_for_bit_size(irbase, size);
 498         } else {
 499                 return get_unsigned_int_type_for_bit_size(irbase, size);
 500         }
 501 }
 502
 503 #define INVALID_TYPE ((ir_type_ptr)-1)
 504
 505 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 506                                   size_t *outer_offset, size_t *outer_align);
 507
 508 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
 509                                    size_t *outer_offset, size_t *outer_align)
 510 {
 511         declaration_t *declaration = type->declaration;
 512         if(declaration->v.irtype != NULL) {
 513                 return declaration->v.irtype;
 514         }
 515
 516         size_t align_all  = 1;
 517         size_t offset     = 0;
 518         size_t bit_offset = 0;
 519         if(irtype == NULL) {
 520                 symbol_t *symbol = declaration->symbol;
 521                 ident    *id;
 522                 if(symbol != NULL) {
 523                         id = unique_ident(symbol->string);
 524                 } else {
 525                         id = unique_ident("__anonymous_struct");
 526                 }
 527                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 528
 529                 irtype = new_d_type_struct(id, dbgi);
 530
 531                 declaration->v.irtype = irtype;
 532                 type->base.firm_type  = irtype;
 533         } else {
 534                 offset    = *outer_offset;
 535                 align_all = *outer_align;
 536         }
 537
 538         declaration_t *entry = declaration->scope.declarations;
 539         for( ; entry != NULL; entry = entry->next) {
 540                 if(entry->namespc != NAMESPACE_NORMAL)
 541                         continue;
 542
 543                 symbol_t *symbol     = entry->symbol;
 544                 type_t   *entry_type = skip_typeref(entry->type);
 545                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 546                 ident    *ident;
 547                 if(symbol != NULL) {
 548                         ident = new_id_from_str(symbol->string);
 549                 } else {
 550                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 551                                 create_struct_type(&entry_type->compound, irtype, &offset,
 552                                                    &align_all);
 553                                 continue;
 554                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 555                                 create_union_type(&entry_type->compound, irtype, &offset,
 556                                                   &align_all);
 557                                 continue;
 558                         } else {
 559                                 assert(entry_type->kind == TYPE_BITFIELD);
 560                         }
 561                         ident = unique_ident("anon");
 562                 }
 563
 564                 ir_type *base_irtype;
 565                 if(entry_type->kind == TYPE_BITFIELD) {
 566                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 567                 } else {
 568                         base_irtype = get_ir_type(entry_type);
 569                 }
 570
 571                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 572                 size_t misalign        = offset % entry_alignment;
 573
 574                 ir_type   *entry_irtype = get_ir_type(entry_type);
 575                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 576
 577                 size_t base;
 578                 size_t bits_remainder;
 579                 if(entry_type->kind == TYPE_BITFIELD) {
 580                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 581                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 582
 583                         if(size_bits > rest_size_bits) {
 584                                 /* start a new bucket */
 585                                 offset     += entry_alignment - misalign;
 586                                 bit_offset  = 0;
 587
 588                                 base           = offset;
 589                                 bits_remainder = 0;
 590                         } else {
 591                                 /* put into current bucket */
 592                                 base           = offset - misalign;
 593                                 bits_remainder = misalign * 8 + bit_offset;
 594                         }
 595
 596                         offset     += size_bits / 8;
 597                         bit_offset  = bit_offset + (size_bits % 8);
 598                 } else {
 599                         size_t entry_size = get_type_size_bytes(base_irtype);
 600                         if(misalign > 0 || bit_offset > 0)
 601                                 offset += entry_alignment - misalign;
 602
 603                         base           = offset;
 604                         bits_remainder = 0;
 605                         offset        += entry_size;
 606                         bit_offset     = 0;
 607                 }
 608
 609                 if(entry_alignment > align_all) {
 610                         if(entry_alignment % align_all != 0) {
 611                                 panic("uneven alignments not supported yet");
 612                         }
 613                         align_all = entry_alignment;
 614                 }
 615
 616                 set_entity_offset(entity, base);
 617                 set_entity_offset_bits_remainder(entity,
 618                                                  (unsigned char) bits_remainder);
 619                 //add_struct_member(irtype, entity);
 620                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 621                 assert(entry->v.entity == NULL);
 622                 entry->v.entity         = entity;
 623         }
 624
 625         size_t misalign = offset % align_all;
 626         if(misalign > 0 || bit_offset > 0) {
 627                 offset += align_all - misalign;
 628         }
 629
 630         if(outer_offset != NULL) {
 631                 *outer_offset = offset;
 632                 *outer_align  = align_all;
 633         } else {
 634                 set_type_alignment_bytes(irtype, align_all);
 635                 set_type_size_bytes(irtype, offset);
 636                 set_type_state(irtype, layout_fixed);
 637         }
 638
 639         return irtype;
 640 }
 641
 642 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 643                                   size_t *outer_offset, size_t *outer_align)
 644 {
 645         declaration_t *declaration = type->declaration;
 646         if(declaration->v.irtype != NULL) {
 647                 return declaration->v.irtype;
 648         }
 649
 650         size_t align_all = 1;
 651         size_t offset    = 0;
 652         size_t size      = 0;
 653
 654         if(irtype == NULL) {
 655                 symbol_t      *symbol      = declaration->symbol;
 656                 ident         *id;
 657                 if(symbol != NULL) {
 658                         id = unique_ident(symbol->string);
 659                 } else {
 660                         id = unique_ident("__anonymous_union");
 661                 }
 662                 dbg_info *dbgi = get_dbg_info(&type->base.source_position);
 663
 664                 irtype = new_d_type_union(id, dbgi);
 665
 666                 declaration->v.irtype = irtype;
 667                 type->base.firm_type  = irtype;
 668         } else {
 669                 offset    = *outer_offset;
 670                 align_all = *outer_align;
 671         }
 672
 673         type->base.firm_type = irtype;
 674
 675         declaration_t *entry = declaration->scope.declarations;
 676         for( ; entry != NULL; entry = entry->next) {
 677                 if(entry->namespc != NAMESPACE_NORMAL)
 678                         continue;
 679
 680                 symbol_t *symbol        = entry->symbol;
 681                 type_t   *entry_type    = skip_typeref(entry->type);
 682                 ir_type  *entry_ir_type = get_ir_type(entry_type);
 683
 684                 ident *ident;
 685                 if(symbol != NULL) {
 686                         ident = new_id_from_str(entry->symbol->string);
 687                 } else {
 688                         size_t offs = offset;
 689                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 690                                 create_struct_type(&entry_type->compound, irtype, &offs,
 691                                                    &align_all);
 692                                 continue;
 693                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 694                                 create_union_type(&entry_type->compound, irtype, &offs,
 695                                                   &align_all);
 696                                 continue;
 697                         } else {
 698                                 panic("anonymous union member must be struct or union");
 699                         }
 700                         size_t entry_size = offs - offset;
 701                         if(entry_size > size) {
 702                                 size = entry_size;
 703                         }
 704                         ident = unique_ident("anon");
 705                 }
 706
 707                 size_t entry_size      = get_type_size_bytes(entry_ir_type);
 708                 size_t entry_alignment = get_type_alignment_bytes(entry_ir_type);
 709
 710                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 711                 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
 712                                                        dbgi);
 713                 //add_union_member(irtype, entity);
 714                 set_entity_offset(entity, 0);
 715                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 716                 assert(entry->v.entity == NULL);
 717                 entry->v.entity         = entity;
 718
 719                 if(entry_size > size) {
 720                         size = entry_size;
 721                 }
 722                 if(entry_alignment > align_all) {
 723                         if(entry_alignment % align_all != 0) {
 724                                 panic("Uneven alignments not supported yet");
 725                         }
 726                         align_all = entry_alignment;
 727                 }
 728         }
 729
 730         if(outer_offset != NULL) {
 731                 assert(*outer_offset == offset);
 732
 733                 size_t misalign = offset % align_all;
 734                 if (misalign != 0)
 735                         size += align_all - misalign;
 736                 *outer_offset += size;
 737
 738                 if(align_all > *outer_align) {
 739                         if(align_all % *outer_align != 0) {
 740                                 panic("uneven alignments not supported yet");
 741                         }
 742                         *outer_align = align_all;
 743                 }
 744         } else {
 745                 set_type_alignment_bytes(irtype, align_all);
 746                 set_type_size_bytes(irtype, size);
 747                 set_type_state(irtype, layout_fixed);
 748                 declaration->v.irtype = irtype;
 749         }
 750
 751         return irtype;
 752 }
 753
 754 static ir_type *create_enum_type(enum_type_t *const type)
 755 {
 756         type->base.firm_type = ir_type_int;
 757
 758         ir_mode *const mode    = mode_int;
 759         tarval  *const one     = get_mode_one(mode);
 760         tarval  *      tv_next = get_tarval_null(mode);
 761
 762         declaration_t *declaration = type->declaration->next;
 763         for (; declaration != NULL; declaration = declaration->next) {
 764                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 765                         break;
 766
 767                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 768
 769                 expression_t *const init = declaration->init.enum_value;
 770                 if (init != NULL) {
 771                         ir_node *const cnst = expression_to_firm(init);
 772                         if (!is_Const(cnst)) {
 773                                 panic("couldn't fold constant");
 774                         }
 775                         tv_next = get_Const_tarval(cnst);
 776                 }
 777                 declaration->v.enum_val = tv_next;
 778                 tv_next = tarval_add(tv_next, one);
 779         }
 780
 781         return ir_type_int;
 782 }
 783
 784 static ir_type *get_ir_type(type_t *type)
 785 {
 786         assert(type != NULL);
 787
 788         type = skip_typeref(type);
 789
 790         if(type->base.firm_type != NULL) {
 791                 assert(type->base.firm_type != INVALID_TYPE);
 792                 return type->base.firm_type;
 793         }
 794
 795         ir_type *firm_type = NULL;
 796         switch(type->kind) {
 797         case TYPE_ERROR:
 798                 panic("error type occurred");
 799         case TYPE_ATOMIC:
 800                 firm_type = create_atomic_type(&type->atomic);
 801                 break;
 802         case TYPE_COMPLEX:
 803                 firm_type = create_complex_type(&type->complex);
 804                 break;
 805         case TYPE_IMAGINARY:
 806                 firm_type = create_imaginary_type(&type->imaginary);
 807                 break;
 808         case TYPE_FUNCTION:
 809                 firm_type = create_method_type(&type->function);
 810                 break;
 811         case TYPE_POINTER:
 812                 firm_type = create_pointer_type(&type->pointer);
 813                 break;
 814         case TYPE_ARRAY:
 815                 firm_type = create_array_type(&type->array);
 816                 break;
 817         case TYPE_COMPOUND_STRUCT:
 818                 firm_type = create_struct_type(&type->compound, NULL, NULL, NULL);
 819                 break;
 820         case TYPE_COMPOUND_UNION:
 821                 firm_type = create_union_type(&type->compound, NULL, NULL, NULL);
 822                 break;
 823         case TYPE_ENUM:
 824                 firm_type = create_enum_type(&type->enumt);
 825                 break;
 826         case TYPE_BUILTIN:
 827                 firm_type = get_ir_type(type->builtin.real_type);
 828                 break;
 829         case TYPE_BITFIELD:
 830                 firm_type = create_bitfield_type(&type->bitfield);
 831                 break;
 832
 833         case TYPE_TYPEOF:
 834         case TYPE_TYPEDEF:
 835         case TYPE_INVALID:
 836                 break;
 837         }
 838         if(firm_type == NULL)
 839                 panic("unknown type found");
 840
 841         type->base.firm_type = firm_type;
 842         return firm_type;
 843 }
 844
 845 static inline ir_mode *get_ir_mode(type_t *type)
 846 {
 847         ir_type *irtype = get_ir_type(type);
 848
 849         /* firm doesn't report a mode for arrays somehow... */
 850         if(is_Array_type(irtype)) {
 851                 return mode_P_data;
 852         }
 853
 854         ir_mode *mode = get_type_mode(irtype);
 855         assert(mode != NULL);
 856         return mode;
 857 }
 858
 859 static ident *predef_idents[rts_max];
 860
 861 /** Names of the runtime functions. */
 862 static const struct {
 863         int        id;           /**< the rts id */
 864         int        n_res;        /**< number of return values */
 865         const char *name;        /**< the name of the rts function */
 866         int        n_params;     /**< number of parameters */
 867         unsigned   flags;        /**< language flags */
 868 } rts_data[] = {
 869         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 870         { rts_abort,      0, "abort",        0, _C89 },
 871         { rts_abs,        1, "abs",          1, _C89 },
 872         { rts_labs,       1, "labs",         1, _C89 },
 873         { rts_llabs,      1, "llabs",        1, _C99 },
 874         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 875
 876         { rts_fabs,       1, "fabs",         1, _C89 },
 877         { rts_sqrt,       1, "sqrt",         1, _C89 },
 878         { rts_cbrt,       1, "cbrt",         1, _C99 },
 879         { rts_exp,        1, "exp",          1, _C89 },
 880         { rts_exp2,       1, "exp2",         1, _C89 },
 881         { rts_exp10,      1, "exp10",        1, _GNUC },
 882         { rts_log,        1, "log",          1, _C89 },
 883         { rts_log2,       1, "log2",         1, _C89 },
 884         { rts_log10,      1, "log10",        1, _C89 },
 885         { rts_pow,        1, "pow",          2, _C89 },
 886         { rts_sin,        1, "sin",          1, _C89 },
 887         { rts_cos,        1, "cos",          1, _C89 },
 888         { rts_tan,        1, "tan",          1, _C89 },
 889         { rts_asin,       1, "asin",         1, _C89 },
 890         { rts_acos,       1, "acos",         1, _C89 },
 891         { rts_atan,       1, "atan",         1, _C89 },
 892         { rts_sinh,       1, "sinh",         1, _C89 },
 893         { rts_cosh,       1, "cosh",         1, _C89 },
 894         { rts_tanh,       1, "tanh",         1, _C89 },
 895
 896         { rts_fabsf,      1, "fabsf",        1, _C99 },
 897         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 898         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 899         { rts_expf,       1, "expf",         1, _C99 },
 900         { rts_exp2f,      1, "exp2f",        1, _C99 },
 901         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 902         { rts_logf,       1, "logf",         1, _C99 },
 903         { rts_log2f,      1, "log2f",        1, _C99 },
 904         { rts_log10f,     1, "log10f",       1, _C99 },
 905         { rts_powf,       1, "powf",         2, _C99 },
 906         { rts_sinf,       1, "sinf",         1, _C99 },
 907         { rts_cosf,       1, "cosf",         1, _C99 },
 908         { rts_tanf,       1, "tanf",         1, _C99 },
 909         { rts_asinf,      1, "asinf",        1, _C99 },
 910         { rts_acosf,      1, "acosf",        1, _C99 },
 911         { rts_atanf,      1, "atanf",        1, _C99 },
 912         { rts_sinhf,      1, "sinhf",        1, _C99 },
 913         { rts_coshf,      1, "coshf",        1, _C99 },
 914         { rts_tanhf,      1, "tanhf",        1, _C99 },
 915
 916         { rts_fabsl,      1, "fabsl",        1, _C99 },
 917         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 918         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 919         { rts_expl,       1, "expl",         1, _C99 },
 920         { rts_exp2l,      1, "exp2l",        1, _C99 },
 921         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 922         { rts_logl,       1, "logl",         1, _C99 },
 923         { rts_log2l,      1, "log2l",        1, _C99 },
 924         { rts_log10l,     1, "log10l",       1, _C99 },
 925         { rts_powl,       1, "powl",         2, _C99 },
 926         { rts_sinl,       1, "sinl",         1, _C99 },
 927         { rts_cosl,       1, "cosl",         1, _C99 },
 928         { rts_tanl,       1, "tanl",         1, _C99 },
 929         { rts_asinl,      1, "asinl",        1, _C99 },
 930         { rts_acosl,      1, "acosl",        1, _C99 },
 931         { rts_atanl,      1, "atanl",        1, _C99 },
 932         { rts_sinhl,      1, "sinhl",        1, _C99 },
 933         { rts_coshl,      1, "coshl",        1, _C99 },
 934         { rts_tanhl,      1, "tanhl",        1, _C99 },
 935
 936         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 937         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 938         { rts_strcmp,     1, "strcmp",       2, _C89 },
 939         { rts_strncmp,    1, "strncmp",      3, _C89 }
 940 };
 941
 942 /**
 943  * Mangles an entity linker (ld) name for win32 usage.
 944  *
 945  * @param ent             the entity to be mangled
 946  * @param decl_modifiers  the set of modifiers for this entity
 947  */
 948 static ir_ident_ptr decorate_win32(ir_entity_ptr ent, decl_modifiers_t decl_modifiers) {
 949         ir_ident_ptr id;
 950
 951         if (is_Method_type(get_entity_type(ent)))
 952                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 953         else {
 954                 /* always add an underscore in win32 */
 955                 id = mangle(new_id_from_chars("_", 1), get_entity_ident(ent));
 956         }
 957
 958         if (decl_modifiers & DM_DLLIMPORT) {
 959                 /* add prefix for imported symbols */
 960                 id = mangle(new_id_from_chars("__imp_", 6), id);
 961         }
 962         return id;
 963 }
 964
 965 /**
 966  * Mangles an entity linker (ld) name from a declaration.
 967  *
 968  * @param ent             the entity to be mangled
 969  * @param declaration     the declaration
 970  */
 971 static void mangle_ent_from_decl(ir_entity *ent, declaration_t *declaration)
 972 {
 973         ident *id;
 974
 975         if (firm_opt.os_support == OS_SUPPORT_MINGW)
 976                 id = decorate_win32(ent, declaration->decl_modifiers);
 977         else
 978                 id = get_entity_ident(ent);
 979
 980         set_entity_ld_ident(ent, id);
 981 }
 982
 983 static ir_entity* get_function_entity(declaration_t *declaration)
 984 {
 985         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 986                 return declaration->v.entity;
 987         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 988
 989         symbol_t *symbol = declaration->symbol;
 990         ident    *id     = new_id_from_str(symbol->string);
 991
 992         ir_type  *global_type    = get_glob_type();
 993         ir_type  *ir_type_method = get_ir_type(declaration->type);
 994         assert(is_Method_type(ir_type_method));
 995
 996         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 997         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 998         mangle_ent_from_decl(entity, declaration);
 999         if(declaration->storage_class == STORAGE_CLASS_STATIC
1000                         || declaration->is_inline) {
1001                 set_entity_visibility(entity, visibility_local);
1002         } else if(declaration->init.statement != NULL) {
1003                 set_entity_visibility(entity, visibility_external_visible);
1004         } else {
1005                 set_entity_visibility(entity, visibility_external_allocated);
1006
1007                 /* We should check for file scope here, but as long as we compile C only
1008                    this is not needed. */
1009                 int    n_params = get_method_n_params(ir_type_method);
1010                 int    n_res    = get_method_n_ress(ir_type_method);
1011                 int    i;
1012
1013                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
1014                         /* found abort(), store for later */
1015                         //abort_ent = ent;
1016                         //abort_tp  = ftype;
1017                 } else {
1018                         if (! firm_opt.freestanding) {
1019                                 /* check for a known runtime function */
1020                                 for (i = 0; i < rts_max; ++i) {
1021                                         /* ignore those rts functions not necessary needed for current mode */
1022                                         if ((c_mode & rts_data[i].flags) == 0)
1023                                                 continue;
1024                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1025                                                 id == predef_idents[rts_data[i].id])
1026                                                 rts_entities[rts_data[i].id] = entity;
1027                                 }
1028                         }
1029                 }
1030         }
1031         set_entity_allocation(entity, allocation_static);
1032
1033         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1034         declaration->v.entity         = entity;
1035
1036         return entity;
1037 }
1038
1039 static ir_node *const_to_firm(const const_expression_t *cnst)
1040 {
1041         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1042         ir_mode  *mode = get_ir_mode(cnst->base.type);
1043
1044         char    buf[128];
1045         tarval *tv;
1046         size_t  len;
1047         if(mode_is_float(mode)) {
1048                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1049         } else {
1050                 if(mode_is_signed(mode)) {
1051                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1052                 } else {
1053                         len = snprintf(buf, sizeof(buf), "%llu",
1054                                        (unsigned long long) cnst->v.int_value);
1055                 }
1056                 tv = new_tarval_from_str(buf, len, mode);
1057         }
1058
1059         return new_d_Const(dbgi, mode, tv);
1060 }
1061
1062 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1063 {
1064         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1065         ir_mode  *mode = get_ir_mode(cnst->base.type);
1066
1067         long long int v = 0;
1068         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1069                 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1070         }
1071         char    buf[128];
1072         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1073         tarval *tv = new_tarval_from_str(buf, len, mode);
1074
1075         return new_d_Const(dbgi, mode, tv);
1076 }
1077
1078 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1079 {
1080         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1081         ir_mode  *mode = get_ir_mode(cnst->base.type);
1082
1083         long long int v = cnst->v.wide_character.begin[0];
1084
1085         char    buf[128];
1086         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1087         tarval *tv = new_tarval_from_str(buf, len, mode);
1088
1089         return new_d_Const(dbgi, mode, tv);
1090 }
1091
1092 static ir_node *create_global(dbg_info *dbgi, ir_mode *mode,
1093                                 ir_entity *entity)
1094 {
1095         assert(entity != NULL);
1096         if(firm_opt.pic) {
1097                 ir_graph *irg = current_ir_graph;
1098                 return new_d_simpleSel(dbgi, get_irg_no_mem(irg),
1099                                 get_irg_globals(irg), entity);
1100         } else {
1101                 symconst_symbol sym;
1102                 sym.entity_p = entity;
1103                 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1104         }
1105 }
1106
1107 static ir_node *string_to_firm(const source_position_t *const src_pos,
1108                                const char *const id_prefix,
1109                                const string_t *const value)
1110 {
1111         ir_type  *const global_type = get_glob_type();
1112         dbg_info *const dbgi        = get_dbg_info(src_pos);
1113         ir_type  *const type        = new_d_type_array(unique_ident("strtype"), 1,
1114                                                        ir_type_const_char, dbgi);
1115
1116         ident     *const id     = unique_ident(id_prefix);
1117         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1118         set_entity_ld_ident(entity, id);
1119         set_entity_variability(entity, variability_constant);
1120         set_entity_allocation(entity, allocation_static);
1121
1122         ir_type *const elem_type = ir_type_const_char;
1123         ir_mode *const mode      = get_type_mode(elem_type);
1124
1125         const char* const string = value->begin;
1126         const size_t      slen   = value->size;
1127
1128         set_array_lower_bound_int(type, 0, 0);
1129         set_array_upper_bound_int(type, 0, slen);
1130         set_type_size_bytes(type, slen);
1131         set_type_state(type, layout_fixed);
1132
1133         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1134         for(size_t i = 0; i < slen; ++i) {
1135                 tvs[i] = new_tarval_from_long(string[i], mode);
1136         }
1137
1138         set_array_entity_values(entity, tvs, slen);
1139         free(tvs);
1140
1141         return create_global(dbgi, mode_P_data, entity);
1142 }
1143
1144 static ir_node *string_literal_to_firm(
1145                 const string_literal_expression_t* literal)
1146 {
1147         return string_to_firm(&literal->base.source_position, "Lstr",
1148                               &literal->value);
1149 }
1150
1151 static ir_node *wide_string_literal_to_firm(
1152         const wide_string_literal_expression_t* const literal)
1153 {
1154         ir_type *const global_type = get_glob_type();
1155         ir_type *const elem_type   = ir_type_wchar_t;
1156         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1157         ir_type *const type        = new_d_type_array(unique_ident("strtype"), 1,
1158                                                     elem_type, dbgi);
1159
1160         ident     *const id     = unique_ident("Lstr");
1161         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1162         set_entity_ld_ident(entity, id);
1163         set_entity_variability(entity, variability_constant);
1164         set_entity_allocation(entity, allocation_static);
1165
1166         ir_mode *const mode      = get_type_mode(elem_type);
1167
1168         const wchar_rep_t *const string = literal->value.begin;
1169         const size_t             slen   = literal->value.size;
1170
1171         set_array_lower_bound_int(type, 0, 0);
1172         set_array_upper_bound_int(type, 0, slen);
1173         set_type_size_bytes(type, slen);
1174         set_type_state(type, layout_fixed);
1175
1176         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1177         for(size_t i = 0; i < slen; ++i) {
1178                 tvs[i] = new_tarval_from_long(string[i], mode);
1179         }
1180
1181         set_array_entity_values(entity, tvs, slen);
1182         free(tvs);
1183
1184         return create_global(dbgi, mode_P_data, entity);
1185 }
1186
1187 static ir_node *deref_address(type_t *const type, ir_node *const addr,
1188                               dbg_info *const dbgi)
1189 {
1190         ir_type *irtype = get_ir_type(type);
1191         if (is_compound_type(irtype)
1192                         || is_Method_type(irtype)
1193                         || is_Array_type(irtype)) {
1194                 return addr;
1195         }
1196
1197         ir_mode *const mode     = get_type_mode(irtype);
1198         ir_node *const memory   = get_store();
1199         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1200         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1201         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1202
1203         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1204                 set_Load_volatility(load, volatility_is_volatile);
1205         }
1206
1207         set_store(load_mem);
1208         return load_res;
1209 }
1210
1211 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1212 {
1213         ir_mode *mode = get_irn_mode(node);
1214
1215         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1216                 return node;
1217         if(!mode_is_float(mode))
1218                 return node;
1219
1220         /* check if there is already a Conv */
1221         if (get_irn_op(node) == op_Conv) {
1222                 /* convert it into a strict Conv */
1223                 set_Conv_strict(node, 1);
1224                 return node;
1225         }
1226
1227         /* otherwise create a new one */
1228         return new_d_strictConv(dbgi, node, mode);
1229 }
1230
1231 static ir_node *get_global_var_address(dbg_info *const dbgi,
1232                                        const declaration_t *const decl)
1233 {
1234         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1235
1236         ir_entity *const entity = decl->v.entity;
1237         switch ((storage_class_tag_t)decl->storage_class) {
1238                 case STORAGE_CLASS_THREAD:
1239                 case STORAGE_CLASS_THREAD_EXTERN:
1240                 case STORAGE_CLASS_THREAD_STATIC: {
1241                         ir_node *const no_mem = new_NoMem();
1242                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1243                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1244                 }
1245
1246                 default:
1247                         return create_global(dbgi, mode_P_data, entity);
1248         }
1249 }
1250
1251 /* Returns the correct base address depending on whether it is a parameter or a
1252  * normal local variable */
1253 static ir_node *get_local_frame(ir_entity *const ent)
1254 {
1255         ir_graph      *const irg   = current_ir_graph;
1256         const ir_type *const owner = get_entity_owner(ent);
1257         if (owner == get_irg_frame_type(irg)) {
1258                 return get_irg_frame(irg);
1259         } else {
1260                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1261                 return get_irg_value_param_base(irg);
1262         }
1263 }
1264
1265 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1266 {
1267         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1268         declaration_t *declaration = ref->declaration;
1269         type_t        *type        = skip_typeref(declaration->type);
1270
1271         switch((declaration_kind_t) declaration->declaration_kind) {
1272         case DECLARATION_KIND_UNKNOWN:
1273                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1274                         break;
1275                 }
1276                 get_ir_type(type);
1277                 /* FALLTHROUGH */
1278
1279         case DECLARATION_KIND_ENUM_ENTRY: {
1280                 ir_mode *const mode = get_ir_mode(type);
1281                 return new_Const(mode, declaration->v.enum_val);
1282         }
1283
1284         case DECLARATION_KIND_LOCAL_VARIABLE: {
1285                 ir_mode *const mode = get_ir_mode(type);
1286                 return get_value(declaration->v.value_number, mode);
1287         }
1288         case DECLARATION_KIND_FUNCTION: {
1289                 ir_mode *const mode = get_ir_mode(type);
1290                 return create_global(dbgi, mode, declaration->v.entity);
1291         }
1292         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1293                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1294                 return deref_address(declaration->type, addr, dbgi);
1295         }
1296
1297         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1298                 ir_entity *entity = declaration->v.entity;
1299                 ir_node   *frame  = get_local_frame(entity);
1300                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1301                 return deref_address(declaration->type, sel, dbgi);
1302         }
1303
1304         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1305                 return declaration->v.vla_base;
1306
1307         case DECLARATION_KIND_COMPOUND_MEMBER:
1308         case DECLARATION_KIND_LABEL_BLOCK:
1309                 panic("not implemented reference type");
1310         }
1311
1312         panic("reference to declaration with unknown type found");
1313 }
1314
1315 static ir_node *reference_addr(const reference_expression_t *ref)
1316 {
1317         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1318         declaration_t *declaration = ref->declaration;
1319
1320         switch((declaration_kind_t) declaration->declaration_kind) {
1321         case DECLARATION_KIND_UNKNOWN:
1322                 break;
1323         case DECLARATION_KIND_LOCAL_VARIABLE:
1324                 panic("local variable without entity has no address");
1325         case DECLARATION_KIND_FUNCTION: {
1326                 type_t *const  type = skip_typeref(ref->base.type);
1327                 ir_mode *const mode = get_ir_mode(type);
1328                 return create_global(dbgi, mode, declaration->v.entity);
1329         }
1330         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1331                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1332                 return addr;
1333         }
1334         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1335                 ir_entity *entity = declaration->v.entity;
1336                 ir_node   *frame  = get_local_frame(entity);
1337                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1338
1339                 return sel;
1340         }
1341
1342         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1343                 return declaration->v.vla_base;
1344
1345         case DECLARATION_KIND_ENUM_ENTRY:
1346                 panic("trying to reference enum entry");
1347
1348         case DECLARATION_KIND_COMPOUND_MEMBER:
1349         case DECLARATION_KIND_LABEL_BLOCK:
1350                 panic("not implemented reference type");
1351         }
1352
1353         panic("reference to declaration with unknown type found");
1354 }
1355
1356 static ir_node *process_builtin_call(const call_expression_t *call)
1357 {
1358         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1359
1360         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1361         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1362
1363         type_t *type = skip_typeref(builtin->base.type);
1364         assert(is_type_pointer(type));
1365
1366         type_t   *function_type = skip_typeref(type->pointer.points_to);
1367         symbol_t *symbol        = builtin->symbol;
1368
1369         switch(symbol->ID) {
1370         case T___builtin_alloca: {
1371                 if(call->arguments == NULL || call->arguments->next != NULL) {
1372                         panic("invalid number of parameters on __builtin_alloca");
1373                 }
1374                 expression_t *argument = call->arguments->expression;
1375                 ir_node      *size     = expression_to_firm(argument);
1376
1377                 ir_node *store  = get_store();
1378                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1379                                               stack_alloc);
1380                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1381                 set_store(proj_m);
1382                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1383
1384                 return res;
1385         }
1386         case T___builtin_nan:
1387         case T___builtin_nanf:
1388         case T___builtin_nand: {
1389                 /* Ignore string for now... */
1390                 assert(is_type_function(function_type));
1391                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1392                 tarval  *tv   = get_mode_NAN(mode);
1393                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1394                 return res;
1395         }
1396         case T___builtin_va_end:
1397                 return NULL;
1398         default:
1399                 panic("Unsupported builtin found\n");
1400         }
1401 }
1402
1403 static ir_node *call_expression_to_firm(const call_expression_t *call)
1404 {
1405         assert(get_cur_block() != NULL);
1406
1407         expression_t *function = call->function;
1408         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1409                 return process_builtin_call(call);
1410         }
1411         ir_node *callee = expression_to_firm(function);
1412
1413         type_t *type = skip_typeref(function->base.type);
1414         assert(is_type_pointer(type));
1415         pointer_type_t *pointer_type = &type->pointer;
1416         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1417         assert(is_type_function(points_to));
1418         function_type_t *function_type = &points_to->function;
1419
1420         int              n_parameters = 0;
1421         call_argument_t *argument     = call->arguments;
1422         for( ; argument != NULL; argument = argument->next) {
1423                 ++n_parameters;
1424         }
1425
1426         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1427
1428         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1429         ir_type *new_method_type = NULL;
1430         if(function_type->variadic || function_type->unspecified_parameters) {
1431                 /* we need to construct a new method type matching the call
1432                  * arguments... */
1433                 int n_res       = get_method_n_ress(ir_method_type);
1434                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1435                 new_method_type = new_d_type_method(unique_ident("calltype"),
1436                                                   n_parameters, n_res, dbgi);
1437                 set_method_calling_convention(new_method_type,
1438                                get_method_calling_convention(ir_method_type));
1439                 set_method_additional_properties(new_method_type,
1440                                get_method_additional_properties(ir_method_type));
1441
1442                 for(int i = 0; i < n_res; ++i) {
1443                         set_method_res_type(new_method_type, i,
1444                                             get_method_res_type(ir_method_type, i));
1445                 }
1446         }
1447         ir_node *in[n_parameters];
1448
1449         argument = call->arguments;
1450         int n = 0;
1451         for( ; argument != NULL; argument = argument->next) {
1452                 expression_t *expression = argument->expression;
1453                 ir_node      *arg_node   = expression_to_firm(expression);
1454
1455                 arg_node = do_strict_conv(dbgi, arg_node);
1456
1457                 in[n] = arg_node;
1458                 if(new_method_type != NULL) {
1459                         ir_type *irtype = get_ir_type(expression->base.type);
1460                         set_method_param_type(new_method_type, n, irtype);
1461                 }
1462
1463                 n++;
1464         }
1465         assert(n == n_parameters);
1466
1467         if(new_method_type != NULL)
1468                 ir_method_type = new_method_type;
1469
1470         ir_node  *store = get_store();
1471         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1472                                      ir_method_type);
1473         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1474         set_store(mem);
1475
1476         type_t  *return_type = skip_typeref(function_type->return_type);
1477         ir_node *result      = NULL;
1478
1479         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1480                 ir_mode *mode;
1481                 if(is_type_scalar(return_type)) {
1482                         mode = get_ir_mode(return_type);
1483                 } else {
1484                         mode = mode_P_data;
1485                 }
1486                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1487                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1488         }
1489
1490         return result;
1491 }
1492
1493 static void statement_to_firm(statement_t *statement);
1494 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1495
1496 static ir_node *expression_to_addr(const expression_t *expression);
1497 static void create_condition_evaluation(const expression_t *expression,
1498                                         ir_node *true_block,
1499                                         ir_node *false_block);
1500
1501 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1502                          ir_node *value)
1503 {
1504         value = do_strict_conv(dbgi, value);
1505
1506         ir_node *memory = get_store();
1507
1508         if(is_type_scalar(type)) {
1509                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1510                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1511                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1512                         set_Store_volatility(store, volatility_is_volatile);
1513                 set_store(store_mem);
1514         } else {
1515                 ir_type *irtype    = get_ir_type(type);
1516                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1517                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1518                 set_store(copyb_mem);
1519         }
1520 }
1521
1522 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1523 {
1524         tarval *all_one   = get_mode_all_one(mode);
1525         int     mode_size = get_mode_size_bits(mode);
1526
1527         assert(offset >= 0 && size >= 0);
1528         assert(offset + size <= mode_size);
1529         if(size == mode_size) {
1530                 return all_one;
1531         }
1532
1533         long    shiftr    = get_mode_size_bits(mode) - size;
1534         long    shiftl    = offset;
1535         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1536         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1537         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1538         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1539
1540         return mask1;
1541 }
1542
1543 static void bitfield_store_to_firm(const unary_expression_t *expression,
1544                                    ir_node *value)
1545 {
1546         expression_t *select = expression->value;
1547         assert(select->kind == EXPR_SELECT);
1548         type_t       *type   = select->base.type;
1549         assert(type->kind == TYPE_BITFIELD);
1550         ir_mode      *mode   = get_ir_mode(type->bitfield.base_type);
1551         ir_node      *addr   = expression_to_addr(select);
1552
1553         assert(get_irn_mode(value) == mode);
1554
1555         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1556
1557         /* kill upper bits of value and shift to right position */
1558         ir_entity *entity       = select->select.compound_entry->v.entity;
1559         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1560         ir_type   *entity_type  = get_entity_type(entity);
1561         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1562
1563         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1564         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1565         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1566         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1567         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1568         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1569
1570         /* load current value */
1571         ir_node  *mem             = get_store();
1572         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1573         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1574         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1575         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1576         tarval   *inv_mask        = tarval_not(shift_mask);
1577         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1578         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1579
1580         /* construct new value and store */
1581         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1582         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1583         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1584         set_store(store_mem);
1585
1586         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1587                 set_Load_volatility(load, volatility_is_volatile);
1588                 set_Store_volatility(store, volatility_is_volatile);
1589         }
1590 }
1591
1592 static void set_value_for_expression(const expression_t *expression,
1593                                      ir_node *value)
1594 {
1595         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1596         value          = do_strict_conv(dbgi, value);
1597
1598         if(expression->kind == EXPR_REFERENCE) {
1599                 const reference_expression_t *ref = &expression->reference;
1600
1601                 declaration_t *declaration = ref->declaration;
1602                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1603                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1604                         set_value(declaration->v.value_number, value);
1605                         return;
1606                 }
1607         }
1608
1609         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1610                 bitfield_store_to_firm(&expression->unary, value);
1611                 return;
1612         }
1613
1614         ir_node *addr = expression_to_addr(expression);
1615         type_t  *type = skip_typeref(expression->base.type);
1616         assign_value(dbgi, addr, type, value);
1617 }
1618
1619 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1620 {
1621         ir_mode *value_mode = get_irn_mode(value);
1622
1623         if (value_mode == dest_mode || is_Bad(value))
1624                 return value;
1625
1626         if(dest_mode == mode_b) {
1627                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1628                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1629                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1630                 return proj;
1631         }
1632
1633         return new_d_Conv(dbgi, value, dest_mode);
1634 }
1635
1636 static ir_node *create_incdec(const unary_expression_t *expression)
1637 {
1638         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1639         type_t       *type  = skip_typeref(expression->base.type);
1640         ir_mode      *mode  = get_ir_mode(type);
1641         expression_t *value = expression->value;
1642
1643         ir_node *value_node = expression_to_firm(value);
1644
1645         ir_node *offset;
1646         if(is_type_pointer(type)) {
1647                 pointer_type_t *pointer_type = &type->pointer;
1648                 offset                       = get_type_size(pointer_type->points_to);
1649         } else {
1650                 assert(is_type_arithmetic(type));
1651                 offset = new_Const(mode, get_mode_one(mode));
1652         }
1653
1654         switch(expression->base.kind) {
1655         case EXPR_UNARY_POSTFIX_INCREMENT: {
1656                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1657                 set_value_for_expression(value, new_value);
1658                 return value_node;
1659         }
1660         case EXPR_UNARY_POSTFIX_DECREMENT: {
1661                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1662                 set_value_for_expression(value, new_value);
1663                 return value_node;
1664         }
1665         case EXPR_UNARY_PREFIX_INCREMENT: {
1666                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1667                 set_value_for_expression(value, new_value);
1668                 return new_value;
1669         }
1670         case EXPR_UNARY_PREFIX_DECREMENT: {
1671                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1672                 set_value_for_expression(value, new_value);
1673                 return new_value;
1674         }
1675         default:
1676                 panic("no incdec expr in create_incdec");
1677                 return NULL;
1678         }
1679 }
1680
1681 static bool is_local_variable(expression_t *expression)
1682 {
1683         if (expression->kind != EXPR_REFERENCE)
1684                 return false;
1685         reference_expression_t *ref_expr    = &expression->reference;
1686         declaration_t          *declaration = ref_expr->declaration;
1687         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1688 }
1689
1690 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1691 {
1692         switch(kind) {
1693         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1694         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1695         case EXPR_BINARY_NOTEQUAL:
1696                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1697         case EXPR_BINARY_ISLESS:
1698         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1699         case EXPR_BINARY_ISLESSEQUAL:
1700         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1701         case EXPR_BINARY_ISGREATER:
1702         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1703         case EXPR_BINARY_ISGREATEREQUAL:
1704         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1705         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1706
1707         default:
1708                 break;
1709         }
1710         panic("trying to get pn_Cmp from non-comparison binexpr type");
1711 }
1712
1713 /**
1714  * Handle the assume optimizer hint: check if a Confirm
1715  * node can be created.
1716  *
1717  * @param dbi    debug info
1718  * @param expr   the IL assume expression
1719  *
1720  * we support here only some simple cases:
1721  *  - var rel const
1722  *  - const rel val
1723  *  - var rel var
1724  */
1725 static ir_node *handle_assume_compare(dbg_info *dbi,
1726                                       const binary_expression_t *expression)
1727 {
1728         expression_t  *op1 = expression->left;
1729         expression_t  *op2 = expression->right;
1730         declaration_t *var2, *var = NULL;
1731         ir_node       *res = NULL;
1732         pn_Cmp         cmp_val;
1733
1734         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1735
1736         if (is_local_variable(op1) && is_local_variable(op2)) {
1737         var  = op1->reference.declaration;
1738             var2 = op2->reference.declaration;
1739
1740                 type_t  *const type = skip_typeref(var->type);
1741                 ir_mode *const mode = get_ir_mode(type);
1742
1743                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1744                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1745
1746                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1747                 set_value(var2->v.value_number, res);
1748
1749                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1750                 set_value(var->v.value_number, res);
1751
1752                 return res;
1753         }
1754
1755         expression_t *con;
1756         if (is_local_variable(op1) && is_constant_expression(op2)) {
1757                 var = op1->reference.declaration;
1758                 con = op2;
1759         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1760                 cmp_val = get_inversed_pnc(cmp_val);
1761                 var = op2->reference.declaration;
1762                 con = op1;
1763         }
1764
1765         if (var != NULL) {
1766                 type_t  *const type = skip_typeref(var->type);
1767                 ir_mode *const mode = get_ir_mode(type);
1768
1769                 res = get_value(var->v.value_number, mode);
1770                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1771                 set_value(var->v.value_number, res);
1772         }
1773         return res;
1774 }
1775
1776 /**
1777  * Handle the assume optimizer hint.
1778  *
1779  * @param dbi    debug info
1780  * @param expr   the IL assume expression
1781  */
1782 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1783         switch(expression->kind) {
1784         case EXPR_BINARY_EQUAL:
1785         case EXPR_BINARY_NOTEQUAL:
1786         case EXPR_BINARY_LESS:
1787         case EXPR_BINARY_LESSEQUAL:
1788         case EXPR_BINARY_GREATER:
1789         case EXPR_BINARY_GREATEREQUAL:
1790                 return handle_assume_compare(dbi, &expression->binary);
1791         default:
1792                 return NULL;
1793         }
1794 }
1795
1796 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1797 {
1798         expression_t *select = expression->value;
1799         assert(select->kind == EXPR_SELECT);
1800
1801         type_t   *type     = select->base.type;
1802         assert(type->kind == TYPE_BITFIELD);
1803         ir_mode  *mode     = get_ir_mode(type->bitfield.base_type);
1804         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1805         ir_node  *addr     = expression_to_addr(select);
1806         ir_node  *mem      = get_store();
1807         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1808         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1809         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1810
1811         load_res           = create_conv(dbgi, load_res, mode_int);
1812
1813         set_store(load_mem);
1814
1815         /* kill upper bits */
1816         ir_entity *entity       = select->select.compound_entry->v.entity;
1817         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1818         ir_type   *entity_type  = get_entity_type(entity);
1819         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1820         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1821         assert(shift_bitsl >= 0);
1822         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1823         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1824         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1825
1826         long       shift_bitsr  = bitoffset + shift_bitsl;
1827         assert(shift_bitsr <= (long) machine_size);
1828         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1829         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1830         ir_node   *shiftr;
1831         if(mode_is_signed(mode)) {
1832                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1833         } else {
1834                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1835         }
1836
1837         return create_conv(dbgi, shiftr, mode);
1838 }
1839
1840 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1841 {
1842         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1843         type_t   *type = skip_typeref(expression->base.type);
1844
1845         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1846                 return expression_to_addr(expression->value);
1847
1848         const expression_t *value = expression->value;
1849
1850         switch(expression->base.kind) {
1851         case EXPR_UNARY_NEGATE: {
1852                 ir_node *value_node = expression_to_firm(value);
1853                 ir_mode *mode = get_ir_mode(type);
1854                 return new_d_Minus(dbgi, value_node, mode);
1855         }
1856         case EXPR_UNARY_PLUS:
1857                 return expression_to_firm(value);
1858         case EXPR_UNARY_BITWISE_NEGATE: {
1859                 ir_node *value_node = expression_to_firm(value);
1860                 ir_mode *mode = get_ir_mode(type);
1861                 return new_d_Not(dbgi, value_node, mode);
1862         }
1863         case EXPR_UNARY_NOT: {
1864                 ir_node *value_node = expression_to_firm(value);
1865                 ir_mode *mode = get_ir_mode(type);
1866                 if(get_irn_mode(value_node) != mode_b) {
1867                         value_node = create_conv(dbgi, value_node, mode_b);
1868                 }
1869                 value_node = new_d_Not(dbgi, value_node, mode_b);
1870                 if(mode != mode_b) {
1871                         value_node = create_conv(dbgi, value_node, mode);
1872                 }
1873                 return value_node;
1874         }
1875         case EXPR_UNARY_DEREFERENCE: {
1876                 ir_node *value_node = expression_to_firm(value);
1877                 type_t  *value_type = skip_typeref(value->base.type);
1878                 assert(is_type_pointer(value_type));
1879                 type_t  *points_to  = value_type->pointer.points_to;
1880                 return deref_address(points_to, value_node, dbgi);
1881         }
1882         case EXPR_UNARY_POSTFIX_INCREMENT:
1883         case EXPR_UNARY_POSTFIX_DECREMENT:
1884         case EXPR_UNARY_PREFIX_INCREMENT:
1885         case EXPR_UNARY_PREFIX_DECREMENT:
1886                 return create_incdec(expression);
1887         case EXPR_UNARY_CAST: {
1888                 ir_node *value_node = expression_to_firm(value);
1889                 if(is_type_scalar(type)) {
1890                         ir_mode *mode = get_ir_mode(type);
1891                         ir_node *node = create_conv(dbgi, value_node, mode);
1892                         node = do_strict_conv(dbgi, node);
1893                         return node;
1894                 } else {
1895                         /* make sure firm type is constructed */
1896                         (void) get_ir_type(type);
1897                         return value_node;
1898                 }
1899         }
1900         case EXPR_UNARY_CAST_IMPLICIT: {
1901                 ir_node *value_node = expression_to_firm(value);
1902                 if(is_type_scalar(type)) {
1903                         ir_mode *mode = get_ir_mode(type);
1904                         return create_conv(dbgi, value_node, mode);
1905                 } else {
1906                         return value_node;
1907                 }
1908         }
1909         case EXPR_UNARY_ASSUME:
1910                 if(firm_opt.confirm)
1911                         return handle_assume(dbgi, value);
1912                 else
1913                         return NULL;
1914         case EXPR_UNARY_BITFIELD_EXTRACT:
1915                 return bitfield_extract_to_firm(expression);
1916
1917         default:
1918                 break;
1919         }
1920         panic("invalid UNEXPR type found");
1921 }
1922
1923 static ir_node *produce_condition_result(const expression_t *expression,
1924                                          dbg_info *dbgi)
1925 {
1926         ir_mode *mode      = get_ir_mode(expression->base.type);
1927         ir_node *cur_block = get_cur_block();
1928
1929         ir_node *one_block = new_immBlock();
1930         ir_node *one       = new_Const(mode, get_mode_one(mode));
1931         ir_node *jmp_one   = new_d_Jmp(dbgi);
1932
1933         ir_node *zero_block = new_immBlock();
1934         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1935         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1936
1937         set_cur_block(cur_block);
1938         create_condition_evaluation(expression, one_block, zero_block);
1939         mature_immBlock(one_block);
1940         mature_immBlock(zero_block);
1941
1942         ir_node *common_block = new_immBlock();
1943         add_immBlock_pred(common_block, jmp_one);
1944         add_immBlock_pred(common_block, jmp_zero);
1945         mature_immBlock(common_block);
1946
1947         ir_node *in[2] = { one, zero };
1948         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1949
1950         return val;
1951 }
1952
1953 static ir_node *create_lazy_op(const binary_expression_t *expression)
1954 {
1955         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1956         type_t   *type = expression->base.type;
1957         ir_mode  *mode = get_ir_mode(type);
1958
1959         if(is_constant_expression(expression->left)) {
1960                 long val = fold_constant(expression->left);
1961                 expression_kind_t ekind = expression->base.kind;
1962                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1963                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1964                         return expression_to_firm(expression->right);
1965                 } else {
1966                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1967                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1968                         return new_Const(mode, get_mode_one(mode));
1969                 }
1970         }
1971
1972         return produce_condition_result((const expression_t*) expression, dbgi);
1973 }
1974
1975 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1976                                             ir_node *right, ir_mode *mode);
1977
1978 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1979                                         create_arithmetic_func func)
1980 {
1981         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1982         ir_node  *left  = expression_to_firm(expression->left);
1983         ir_node  *right = expression_to_firm(expression->right);
1984         type_t   *type  = expression->right->base.type;
1985         /* be careful with the modes, because in arithmetic assign nodes only
1986          * the right operand has the mode of the arithmetic already */
1987         ir_mode  *mode  = get_ir_mode(type);
1988         left            = create_conv(dbgi, left, mode);
1989         ir_node  *res   = func(dbgi, left, right, mode);
1990
1991         return res;
1992 }
1993
1994 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1995                                    ir_node  *      integer,
1996                                    type_t   *const type,
1997                                    dbg_info *const dbgi,
1998                                    const create_arithmetic_func func)
1999 {
2000         pointer_type_t *const pointer_type = &type->pointer;
2001         type_t         *const points_to    = pointer_type->points_to;
2002         const unsigned        elem_size    = get_type_size_const(points_to);
2003
2004         assert(elem_size >= 1);
2005         if (elem_size > 1) {
2006                 integer             = create_conv(dbgi, integer, mode_int);
2007                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2008                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
2009                 integer = mul;
2010         }
2011
2012         ir_mode *const mode = get_ir_mode(type);
2013         return func(dbgi, pointer, integer, mode);
2014 }
2015
2016 static ir_node *create_arithmetic_assign_binop(
2017                 const binary_expression_t *expression, create_arithmetic_func func)
2018 {
2019         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2020         type_t   *const type = skip_typeref(expression->base.type);
2021         ir_node  *value;
2022
2023         if (is_type_pointer(type)) {
2024                 ir_node *const pointer = expression_to_firm(expression->left);
2025                 ir_node *      integer = expression_to_firm(expression->right);
2026                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
2027         } else {
2028                 value = create_arithmetic_binop(expression, func);
2029         }
2030
2031         ir_mode *const mode = get_ir_mode(type);
2032         value = create_conv(dbgi, value, mode);
2033         set_value_for_expression(expression->left, value);
2034
2035         return value;
2036 }
2037
2038 static ir_node *create_add(const binary_expression_t *expression)
2039 {
2040         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2041         ir_node  *left  = expression_to_firm(expression->left);
2042         ir_node  *right = expression_to_firm(expression->right);
2043         type_t   *type  = expression->base.type;
2044
2045         expression_t *expr_left  = expression->left;
2046         expression_t *expr_right = expression->right;
2047         type_t       *type_left  = skip_typeref(expr_left->base.type);
2048         type_t       *type_right = skip_typeref(expr_right->base.type);
2049
2050         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2051                 ir_mode *const mode = get_ir_mode(type);
2052                 return new_d_Add(dbgi, left, right, mode);
2053         }
2054
2055         if (is_type_pointer(type_left)) {
2056                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2057         } else {
2058                 assert(is_type_pointer(type_right));
2059                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2060         }
2061 }
2062
2063 static ir_node *create_sub(const binary_expression_t *expression)
2064 {
2065         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2066         expression_t *const expr_left  = expression->left;
2067         expression_t *const expr_right = expression->right;
2068         ir_node      *const left       = expression_to_firm(expr_left);
2069         ir_node      *const right      = expression_to_firm(expr_right);
2070         type_t       *const type       = expression->base.type;
2071         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2072         type_t       *const type_right = skip_typeref(expr_right->base.type);
2073
2074         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2075                 ir_mode *const mode = get_ir_mode(type);
2076                 return new_d_Sub(dbgi, left, right, mode);
2077         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2078                 const pointer_type_t *const ptr_type = &type_left->pointer;
2079
2080                 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2081                 ir_mode *const mode      = get_ir_mode(type);
2082                 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2083                 ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2084                 ir_node *const no_mem    = new_NoMem();
2085                 ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2086                                                        op_pin_state_floats);
2087                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2088         }
2089
2090         assert(is_type_pointer(type_left));
2091         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2092 }
2093
2094 static ir_node *create_shift(const binary_expression_t *expression)
2095 {
2096         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2097         ir_node  *left  = expression_to_firm(expression->left);
2098         ir_node  *right = expression_to_firm(expression->right);
2099         type_t   *type  = expression->base.type;
2100         ir_mode  *mode  = get_ir_mode(type);
2101
2102         /* firm always wants the shift count to be unsigned */
2103         right = create_conv(dbgi, right, mode_uint);
2104
2105         ir_node *res;
2106
2107         switch(expression->base.kind) {
2108         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2109         case EXPR_BINARY_SHIFTLEFT:
2110                 res = new_d_Shl(dbgi, left, right, mode);
2111                 break;
2112         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2113         case EXPR_BINARY_SHIFTRIGHT: {
2114                  expression_t *expr_left = expression->left;
2115                  type_t       *type_left = skip_typeref(expr_left->base.type);
2116
2117                  if(is_type_signed(type_left)) {
2118                         res = new_d_Shrs(dbgi, left, right, mode);
2119                  } else {
2120                          res = new_d_Shr(dbgi, left, right, mode);
2121                  }
2122                  break;
2123         }
2124         default:
2125                 panic("create shift op called for non-shift op");
2126         }
2127
2128         return res;
2129 }
2130
2131
2132 static ir_node *create_divmod(const binary_expression_t *expression)
2133 {
2134         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2135         ir_node  *left  = expression_to_firm(expression->left);
2136         ir_node  *right = expression_to_firm(expression->right);
2137         ir_node  *pin   = new_Pin(new_NoMem());
2138         /* be careful with the modes, because in arithmetic assign nodes only
2139          * the right operand has the mode of the arithmetic already */
2140         type_t   *type  = expression->right->base.type;
2141         ir_mode  *mode  = get_ir_mode(type);
2142         left            = create_conv(dbgi, left, mode);
2143         ir_node  *op;
2144         ir_node  *res;
2145
2146         switch (expression->base.kind) {
2147         case EXPR_BINARY_DIV:
2148         case EXPR_BINARY_DIV_ASSIGN:
2149                 if(mode_is_float(mode)) {
2150                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2151                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2152                 } else {
2153                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2154                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2155                 }
2156                 break;
2157
2158         case EXPR_BINARY_MOD:
2159         case EXPR_BINARY_MOD_ASSIGN:
2160                 assert(!mode_is_float(mode));
2161                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2162                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2163                 break;
2164
2165         default: panic("unexpected binary expression type in create_divmod()");
2166         }
2167
2168         return res;
2169 }
2170
2171 static ir_node *create_arithmetic_assign_divmod(
2172                 const binary_expression_t *expression)
2173 {
2174         ir_node  *      value = create_divmod(expression);
2175         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2176         type_t   *const type  = expression->base.type;
2177         ir_mode  *const mode  = get_ir_mode(type);
2178
2179         assert(type->kind != TYPE_POINTER);
2180
2181         value = create_conv(dbgi, value, mode);
2182         set_value_for_expression(expression->left, value);
2183
2184         return value;
2185 }
2186
2187 static ir_node *create_arithmetic_assign_shift(
2188                 const binary_expression_t *expression)
2189 {
2190         ir_node  *      value = create_shift(expression);
2191         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2192         type_t   *const type  = expression->base.type;
2193         ir_mode  *const mode  = get_ir_mode(type);
2194
2195         value = create_conv(dbgi, value, mode);
2196         set_value_for_expression(expression->left, value);
2197
2198         return value;
2199 }
2200
2201 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2202 {
2203         expression_kind_t kind = expression->base.kind;
2204
2205         switch(kind) {
2206         case EXPR_BINARY_EQUAL:
2207         case EXPR_BINARY_NOTEQUAL:
2208         case EXPR_BINARY_LESS:
2209         case EXPR_BINARY_LESSEQUAL:
2210         case EXPR_BINARY_GREATER:
2211         case EXPR_BINARY_GREATEREQUAL:
2212         case EXPR_BINARY_ISGREATER:
2213         case EXPR_BINARY_ISGREATEREQUAL:
2214         case EXPR_BINARY_ISLESS:
2215         case EXPR_BINARY_ISLESSEQUAL:
2216         case EXPR_BINARY_ISLESSGREATER:
2217         case EXPR_BINARY_ISUNORDERED: {
2218                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2219                 ir_node *left  = expression_to_firm(expression->left);
2220                 ir_node *right = expression_to_firm(expression->right);
2221                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2222                 long     pnc   = get_pnc(kind, expression->left->base.type);
2223                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2224                 return proj;
2225         }
2226         case EXPR_BINARY_ASSIGN: {
2227                 ir_node *right = expression_to_firm(expression->right);
2228                 set_value_for_expression(expression->left, right);
2229
2230                 return right;
2231         }
2232         case EXPR_BINARY_ADD:
2233                 return create_add(expression);
2234         case EXPR_BINARY_SUB:
2235                 return create_sub(expression);
2236         case EXPR_BINARY_MUL:
2237                 return create_arithmetic_binop(expression, new_d_Mul);
2238         case EXPR_BINARY_BITWISE_AND:
2239                 return create_arithmetic_binop(expression, new_d_And);
2240         case EXPR_BINARY_BITWISE_OR:
2241                 return create_arithmetic_binop(expression, new_d_Or);
2242         case EXPR_BINARY_BITWISE_XOR:
2243                 return create_arithmetic_binop(expression, new_d_Eor);
2244         case EXPR_BINARY_SHIFTLEFT:
2245         case EXPR_BINARY_SHIFTRIGHT:
2246                 return create_shift(expression);
2247         case EXPR_BINARY_DIV:
2248         case EXPR_BINARY_MOD:
2249                 return create_divmod(expression);
2250         case EXPR_BINARY_LOGICAL_AND:
2251         case EXPR_BINARY_LOGICAL_OR:
2252                 return create_lazy_op(expression);
2253         case EXPR_BINARY_COMMA:
2254                 expression_to_firm(expression->left);
2255                 return expression_to_firm(expression->right);
2256         case EXPR_BINARY_ADD_ASSIGN:
2257                 return create_arithmetic_assign_binop(expression, new_d_Add);
2258         case EXPR_BINARY_SUB_ASSIGN:
2259                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2260         case EXPR_BINARY_MUL_ASSIGN:
2261                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2262         case EXPR_BINARY_MOD_ASSIGN:
2263         case EXPR_BINARY_DIV_ASSIGN:
2264                 return create_arithmetic_assign_divmod(expression);
2265         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2266                 return create_arithmetic_assign_binop(expression, new_d_And);
2267         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2268                 return create_arithmetic_assign_binop(expression, new_d_Or);
2269         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2270                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2271         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2272         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2273                 return create_arithmetic_assign_shift(expression);
2274         case EXPR_BINARY_BUILTIN_EXPECT:
2275                 return expression_to_firm(expression->left);
2276         default:
2277                 panic("TODO binexpr type");
2278         }
2279 }
2280
2281 static ir_node *array_access_addr(const array_access_expression_t *expression)
2282 {
2283         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2284         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2285         ir_node  *offset    = expression_to_firm(expression->index);
2286         offset              = create_conv(dbgi, offset, mode_uint);
2287
2288         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2289         assert(is_type_pointer(ref_type));
2290         pointer_type_t *pointer_type = &ref_type->pointer;
2291
2292         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2293         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2294                                              mode_uint);
2295         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2296
2297         return result;
2298 }
2299
2300 static ir_node *array_access_to_firm(
2301                 const array_access_expression_t *expression)
2302 {
2303         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2304         ir_node  *addr   = array_access_addr(expression);
2305         type_t   *type   = revert_automatic_type_conversion(
2306                         (const expression_t*) expression);
2307         type             = skip_typeref(type);
2308
2309         return deref_address(type, addr, dbgi);
2310 }
2311
2312 static long get_offsetof_offset(const offsetof_expression_t *expression)
2313 {
2314         type_t *orig_type = expression->type;
2315         long    offset    = 0;
2316
2317         designator_t *designator = expression->designator;
2318         for( ; designator != NULL; designator = designator->next) {
2319                 type_t *type = skip_typeref(orig_type);
2320                 /* be sure the type is constructed */
2321                 (void) get_ir_type(type);
2322
2323                 if(designator->symbol != NULL) {
2324                         assert(is_type_compound(type));
2325                         symbol_t *symbol = designator->symbol;
2326
2327                         declaration_t *declaration = type->compound.declaration;
2328                         declaration_t *iter        = declaration->scope.declarations;
2329                         for( ; iter != NULL; iter = iter->next) {
2330                                 if(iter->symbol == symbol) {
2331                                         break;
2332                                 }
2333                         }
2334                         assert(iter != NULL);
2335
2336                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2337                         offset += get_entity_offset(iter->v.entity);
2338
2339                         orig_type = iter->type;
2340                 } else {
2341                         expression_t *array_index = designator->array_index;
2342                         assert(designator->array_index != NULL);
2343                         assert(is_type_array(type));
2344                         assert(is_type_valid(array_index->base.type));
2345
2346                         long index         = fold_constant(array_index);
2347                         ir_type *arr_type  = get_ir_type(type);
2348                         ir_type *elem_type = get_array_element_type(arr_type);
2349                         long     elem_size = get_type_size_bytes(elem_type);
2350
2351                         offset += index * elem_size;
2352
2353                         orig_type = type->array.element_type;
2354                 }
2355         }
2356
2357         return offset;
2358 }
2359
2360 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2361 {
2362         ir_mode  *mode   = get_ir_mode(expression->base.type);
2363         long      offset = get_offsetof_offset(expression);
2364         tarval   *tv     = new_tarval_from_long(offset, mode);
2365         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2366
2367         return new_d_Const(dbgi, mode, tv);
2368 }
2369
2370 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2371                                      ir_entity *entity, type_t *type);
2372
2373 static ir_node *compound_literal_to_firm(
2374                 const compound_literal_expression_t *expression)
2375 {
2376         type_t *type = expression->type;
2377
2378         /* create an entity on the stack */
2379         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2380
2381         ident     *const id     = unique_ident("CompLit");
2382         ir_type   *const irtype = get_ir_type(type);
2383         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2384         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2385         set_entity_ld_ident(entity, id);
2386
2387         set_entity_variability(entity, variability_uninitialized);
2388
2389         /* create initialisation code */
2390         initializer_t *initializer = expression->initializer;
2391         create_local_initializer(initializer, dbgi, entity, type);
2392
2393         /* create a sel for the compound literal address */
2394         ir_node *frame = get_local_frame(entity);
2395         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2396         return sel;
2397 }
2398
2399 /**
2400  * Transform a sizeof expression into Firm code.
2401  */
2402 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2403 {
2404         type_t *type = expression->type;
2405         if(type == NULL) {
2406                 type = expression->tp_expression->base.type;
2407                 assert(type != NULL);
2408         }
2409
2410         type = skip_typeref(type);
2411         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2412         if(is_type_array(type) && type->array.is_vla
2413                         && expression->tp_expression != NULL) {
2414                 expression_to_firm(expression->tp_expression);
2415         }
2416
2417         return get_type_size(type);
2418 }
2419
2420 /**
2421  * Transform an alignof expression into Firm code.
2422  */
2423 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2424 {
2425         type_t *type = expression->type;
2426         if(type == NULL) {
2427                 /* beware: if expression is a variable reference, return the
2428                    alignment of the variable. */
2429                 const expression_t *tp_expression = expression->tp_expression;
2430                 const declaration_t *declaration = expr_is_variable(tp_expression);
2431                 if (declaration != NULL) {
2432                         /* TODO: get the alignment of this variable. */
2433                 }
2434                 type = tp_expression->base.type;
2435                 assert(type != NULL);
2436         }
2437
2438         ir_mode *const mode = get_ir_mode(expression->base.type);
2439         symconst_symbol sym;
2440         sym.type_p = get_ir_type(type);
2441         return new_SymConst(mode, sym, symconst_type_align);
2442 }
2443
2444 static void init_ir_types(void);
2445 long fold_constant(const expression_t *expression)
2446 {
2447         init_ir_types();
2448
2449         assert(is_constant_expression(expression));
2450
2451         ir_graph *old_current_ir_graph = current_ir_graph;
2452         if(current_ir_graph == NULL) {
2453                 current_ir_graph = get_const_code_irg();
2454         }
2455
2456         ir_node *cnst = expression_to_firm(expression);
2457         current_ir_graph = old_current_ir_graph;
2458
2459         if(!is_Const(cnst)) {
2460                 panic("couldn't fold constant\n");
2461         }
2462
2463         tarval *tv = get_Const_tarval(cnst);
2464         if(!tarval_is_long(tv)) {
2465                 panic("result of constant folding is not integer\n");
2466         }
2467
2468         return get_tarval_long(tv);
2469 }
2470
2471 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2472 {
2473         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2474
2475         /* first try to fold a constant condition */
2476         if(is_constant_expression(expression->condition)) {
2477                 long val = fold_constant(expression->condition);
2478                 if(val) {
2479                         return expression_to_firm(expression->true_expression);
2480                 } else {
2481                         return expression_to_firm(expression->false_expression);
2482                 }
2483         }
2484
2485         ir_node *cur_block   = get_cur_block();
2486
2487         /* create the true block */
2488         ir_node *true_block  = new_immBlock();
2489
2490         ir_node *true_val = expression_to_firm(expression->true_expression);
2491         ir_node *true_jmp = new_Jmp();
2492
2493         /* create the false block */
2494         ir_node *false_block = new_immBlock();
2495
2496         ir_node *false_val = expression_to_firm(expression->false_expression);
2497         ir_node *false_jmp = new_Jmp();
2498
2499         /* create the condition evaluation */
2500         set_cur_block(cur_block);
2501         create_condition_evaluation(expression->condition, true_block, false_block);
2502         mature_immBlock(true_block);
2503         mature_immBlock(false_block);
2504
2505         /* create the common block */
2506         ir_node *common_block = new_immBlock();
2507         add_immBlock_pred(common_block, true_jmp);
2508         add_immBlock_pred(common_block, false_jmp);
2509         mature_immBlock(common_block);
2510
2511         /* TODO improve static semantics, so either both or no values are NULL */
2512         if (true_val == NULL || false_val == NULL)
2513                 return NULL;
2514
2515         ir_node *in[2] = { true_val, false_val };
2516         ir_mode *mode  = get_irn_mode(true_val);
2517         assert(get_irn_mode(false_val) == mode);
2518         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2519
2520         return val;
2521 }
2522
2523 static ir_node *select_addr(const select_expression_t *expression)
2524 {
2525         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2526
2527         ir_node *compound_addr = expression_to_firm(expression->compound);
2528
2529         declaration_t *entry = expression->compound_entry;
2530         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2531         ir_entity     *entity = entry->v.entity;
2532
2533         assert(entity != NULL);
2534
2535         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2536
2537         return sel;
2538 }
2539
2540 static ir_node *select_to_firm(const select_expression_t *expression)
2541 {
2542         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2543         ir_node  *addr   = select_addr(expression);
2544         type_t   *type   = revert_automatic_type_conversion(
2545                         (const expression_t*) expression);
2546         type             = skip_typeref(type);
2547
2548         return deref_address(type, addr, dbgi);
2549 }
2550
2551 /* Values returned by __builtin_classify_type. */
2552 typedef enum gcc_type_class
2553 {
2554         no_type_class = -1,
2555         void_type_class,
2556         integer_type_class,
2557         char_type_class,
2558         enumeral_type_class,
2559         boolean_type_class,
2560         pointer_type_class,
2561         reference_type_class,
2562         offset_type_class,
2563         real_type_class,
2564         complex_type_class,
2565         function_type_class,
2566         method_type_class,
2567         record_type_class,
2568         union_type_class,
2569         array_type_class,
2570         string_type_class,
2571         set_type_class,
2572         file_type_class,
2573         lang_type_class
2574 } gcc_type_class;
2575
2576 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2577 {
2578         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2579
2580         gcc_type_class tc;
2581         switch (type->kind)
2582         {
2583                 case TYPE_ATOMIC: {
2584                         const atomic_type_t *const atomic_type = &type->atomic;
2585                         switch (atomic_type->akind) {
2586                                 /* should not be reached */
2587                                 case ATOMIC_TYPE_INVALID:
2588                                         tc = no_type_class;
2589                                         goto make_const;
2590
2591                                 /* gcc cannot do that */
2592                                 case ATOMIC_TYPE_VOID:
2593                                         tc = void_type_class;
2594                                         goto make_const;
2595
2596                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2597                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2598                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2599                                 case ATOMIC_TYPE_SHORT:
2600                                 case ATOMIC_TYPE_USHORT:
2601                                 case ATOMIC_TYPE_INT:
2602                                 case ATOMIC_TYPE_UINT:
2603                                 case ATOMIC_TYPE_LONG:
2604                                 case ATOMIC_TYPE_ULONG:
2605                                 case ATOMIC_TYPE_LONGLONG:
2606                                 case ATOMIC_TYPE_ULONGLONG:
2607                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2608                                         tc = integer_type_class;
2609                                         goto make_const;
2610
2611                                 case ATOMIC_TYPE_FLOAT:
2612                                 case ATOMIC_TYPE_DOUBLE:
2613                                 case ATOMIC_TYPE_LONG_DOUBLE:
2614                                         tc = real_type_class;
2615                                         goto make_const;
2616                         }
2617                         panic("Unexpected atomic type in classify_type_to_firm().");
2618                 }
2619
2620                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2621                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2622                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2623                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2624                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2625                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2626                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2627                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2628
2629                 /* gcc handles this as integer */
2630                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2631
2632                 case TYPE_BUILTIN:
2633                 /* typedef/typeof should be skipped already */
2634                 case TYPE_TYPEDEF:
2635                 case TYPE_TYPEOF:
2636                 case TYPE_INVALID:
2637                 case TYPE_ERROR:
2638                         break;
2639         }
2640         panic("unexpected TYPE classify_type_to_firm().");
2641
2642 make_const: ;
2643         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2644         ir_mode  *const mode = mode_int;
2645         tarval   *const tv   = new_tarval_from_long(tc, mode);
2646         return new_d_Const(dbgi, mode, tv);
2647 }
2648
2649 static ir_node *function_name_to_firm(
2650                 const funcname_expression_t *const expr)
2651 {
2652         switch(expr->kind) {
2653         case FUNCNAME_FUNCTION:
2654         case FUNCNAME_PRETTY_FUNCTION:
2655         case FUNCNAME_FUNCDNAME:
2656                 if (current_function_name == NULL) {
2657                         const source_position_t *const src_pos = &expr->base.source_position;
2658                         const char *const name = current_function_decl->symbol->string;
2659                         const string_t string = { name, strlen(name) + 1 };
2660                         current_function_name = string_to_firm(src_pos, "__func__", &string);
2661                 }
2662                 return current_function_name;
2663         case FUNCNAME_FUNCSIG:
2664                 if (current_funcsig == NULL) {
2665                         const source_position_t *const src_pos = &expr->base.source_position;
2666                         ir_entity *ent = get_irg_entity(current_ir_graph);
2667                         const char *const name = get_entity_ld_name(ent);
2668                         const string_t string = { name, strlen(name) + 1 };
2669                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__", &string);
2670                 }
2671                 return current_funcsig;
2672         }
2673         panic("Unsupported function name");
2674 }
2675
2676 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2677 {
2678         statement_t *statement = expr->statement;
2679
2680         assert(statement->kind == STATEMENT_COMPOUND);
2681         return compound_statement_to_firm(&statement->compound);
2682 }
2683
2684 static ir_node *va_start_expression_to_firm(
2685         const va_start_expression_t *const expr)
2686 {
2687         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2688         int        const n           = get_method_n_params(method_type) - 1;
2689         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2690         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2691         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2692         ir_node   *const no_mem      = new_NoMem();
2693         ir_node   *const arg_sel     =
2694                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2695
2696         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2697         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2698         set_value_for_expression(expr->ap, add);
2699
2700         return NULL;
2701 }
2702
2703 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2704 {
2705         type_t   *const type   = expr->base.type;
2706         ir_node  *const ap     = expression_to_firm(expr->ap);
2707         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2708         ir_node  *const res    = deref_address(type, ap, dbgi);
2709
2710         ir_node  *const cnst   = get_type_size(expr->base.type);
2711         ir_node  *const add    = new_d_Add(dbgi, ap, cnst, mode_P_data);
2712         set_value_for_expression(expr->ap, add);
2713
2714         return res;
2715 }
2716
2717 static ir_node *dereference_addr(const unary_expression_t *const expression)
2718 {
2719         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2720         return expression_to_firm(expression->value);
2721 }
2722
2723 static ir_node *expression_to_addr(const expression_t *expression)
2724 {
2725         switch(expression->kind) {
2726         case EXPR_REFERENCE:
2727                 return reference_addr(&expression->reference);
2728         case EXPR_ARRAY_ACCESS:
2729                 return array_access_addr(&expression->array_access);
2730         case EXPR_SELECT:
2731                 return select_addr(&expression->select);
2732         case EXPR_CALL:
2733                 return call_expression_to_firm(&expression->call);
2734         case EXPR_UNARY_DEREFERENCE: {
2735                 return dereference_addr(&expression->unary);
2736         }
2737         default:
2738                 break;
2739         }
2740         panic("trying to get address of non-lvalue");
2741 }
2742
2743 static ir_node *builtin_constant_to_firm(
2744                 const builtin_constant_expression_t *expression)
2745 {
2746         ir_mode *mode = get_ir_mode(expression->base.type);
2747         long     v;
2748
2749         if (is_constant_expression(expression->value)) {
2750                 v = 1;
2751         } else {
2752                 v = 0;
2753         }
2754         return new_Const_long(mode, v);
2755 }
2756
2757 static ir_node *builtin_prefetch_to_firm(
2758                 const builtin_prefetch_expression_t *expression)
2759 {
2760         ir_node *adr = expression_to_firm(expression->adr);
2761         /* no Firm support for prefetch yet */
2762         (void) adr;
2763         return NULL;
2764 }
2765
2766 static ir_node *_expression_to_firm(const expression_t *expression)
2767 {
2768         switch(expression->kind) {
2769         case EXPR_CHARACTER_CONSTANT:
2770                 return character_constant_to_firm(&expression->conste);
2771         case EXPR_WIDE_CHARACTER_CONSTANT:
2772                 return wide_character_constant_to_firm(&expression->conste);
2773         case EXPR_CONST:
2774                 return const_to_firm(&expression->conste);
2775         case EXPR_STRING_LITERAL:
2776                 return string_literal_to_firm(&expression->string);
2777         case EXPR_WIDE_STRING_LITERAL:
2778                 return wide_string_literal_to_firm(&expression->wide_string);
2779         case EXPR_REFERENCE:
2780                 return reference_expression_to_firm(&expression->reference);
2781         case EXPR_CALL:
2782                 return call_expression_to_firm(&expression->call);
2783         EXPR_UNARY_CASES
2784                 return unary_expression_to_firm(&expression->unary);
2785         EXPR_BINARY_CASES
2786                 return binary_expression_to_firm(&expression->binary);
2787         case EXPR_ARRAY_ACCESS:
2788                 return array_access_to_firm(&expression->array_access);
2789         case EXPR_SIZEOF:
2790                 return sizeof_to_firm(&expression->typeprop);
2791         case EXPR_ALIGNOF:
2792                 return alignof_to_firm(&expression->typeprop);
2793         case EXPR_CONDITIONAL:
2794                 return conditional_to_firm(&expression->conditional);
2795         case EXPR_SELECT:
2796                 return select_to_firm(&expression->select);
2797         case EXPR_CLASSIFY_TYPE:
2798                 return classify_type_to_firm(&expression->classify_type);
2799         case EXPR_FUNCNAME:
2800                 return function_name_to_firm(&expression->funcname);
2801         case EXPR_STATEMENT:
2802                 return statement_expression_to_firm(&expression->statement);
2803         case EXPR_VA_START:
2804                 return va_start_expression_to_firm(&expression->va_starte);
2805         case EXPR_VA_ARG:
2806                 return va_arg_expression_to_firm(&expression->va_arge);
2807         case EXPR_BUILTIN_SYMBOL:
2808                 panic("unimplemented expression found");
2809         case EXPR_BUILTIN_CONSTANT_P:
2810                 return builtin_constant_to_firm(&expression->builtin_constant);
2811         case EXPR_BUILTIN_PREFETCH:
2812                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2813         case EXPR_OFFSETOF:
2814                 return offsetof_to_firm(&expression->offsetofe);
2815         case EXPR_COMPOUND_LITERAL:
2816                 return compound_literal_to_firm(&expression->compound_literal);
2817
2818         case EXPR_UNKNOWN:
2819         case EXPR_INVALID:
2820                 break;
2821         }
2822         panic("invalid expression found");
2823 }
2824
2825 static ir_node *expression_to_firm(const expression_t *expression)
2826 {
2827         ir_node *res = _expression_to_firm(expression);
2828
2829         if(res != NULL && get_irn_mode(res) == mode_b) {
2830                 ir_mode *mode = get_ir_mode(expression->base.type);
2831                 if(is_Const(res)) {
2832                         if(is_Const_null(res)) {
2833                                 return new_Const_long(mode, 0);
2834                         } else {
2835                                 assert(is_Const_one(res));
2836                                 return new_Const_long(mode, 1);
2837                         }
2838                 }
2839
2840                 dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2841                 return produce_condition_result(expression, dbgi);
2842         }
2843
2844         return res;
2845 }
2846
2847 static ir_node *expression_to_modeb(const expression_t *expression)
2848 {
2849         ir_node *res = _expression_to_firm(expression);
2850         res          = create_conv(NULL, res, mode_b);
2851
2852         return res;
2853 }
2854
2855 /**
2856  * create a short-circuit expression evaluation that tries to construct
2857  * efficient control flow structures for &&, || and ! expressions
2858  */
2859 static void create_condition_evaluation(const expression_t *expression,
2860                                         ir_node *true_block,
2861                                         ir_node *false_block)
2862 {
2863         switch(expression->kind) {
2864         case EXPR_UNARY_NOT: {
2865                 const unary_expression_t *unary_expression = &expression->unary;
2866                 create_condition_evaluation(unary_expression->value, false_block,
2867                                             true_block);
2868                 return;
2869         }
2870         case EXPR_BINARY_LOGICAL_AND: {
2871                 const binary_expression_t *binary_expression = &expression->binary;
2872
2873                 ir_node *cur_block   = get_cur_block();
2874                 ir_node *extra_block = new_immBlock();
2875                 set_cur_block(cur_block);
2876                 create_condition_evaluation(binary_expression->left, extra_block,
2877                                             false_block);
2878                 mature_immBlock(extra_block);
2879                 set_cur_block(extra_block);
2880                 create_condition_evaluation(binary_expression->right, true_block,
2881                                             false_block);
2882                 return;
2883         }
2884         case EXPR_BINARY_LOGICAL_OR: {
2885                 const binary_expression_t *binary_expression = &expression->binary;
2886
2887                 ir_node *cur_block   = get_cur_block();
2888                 ir_node *extra_block = new_immBlock();
2889                 set_cur_block(cur_block);
2890                 create_condition_evaluation(binary_expression->left, true_block,
2891                                             extra_block);
2892                 mature_immBlock(extra_block);
2893                 set_cur_block(extra_block);
2894                 create_condition_evaluation(binary_expression->right, true_block,
2895                                             false_block);
2896                 return;
2897         }
2898         default:
2899                 break;
2900         }
2901
2902         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2903         ir_node  *condition  = expression_to_modeb(expression);
2904         ir_node  *cond       = new_d_Cond(dbgi, condition);
2905         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2906         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2907
2908         /* set branch prediction info based on __builtin_expect */
2909         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2910                 long               cnst = fold_constant(expression->binary.right);
2911                 cond_jmp_predicate pred;
2912
2913                 if(cnst == 0) {
2914                         pred = COND_JMP_PRED_FALSE;
2915                 } else {
2916                         pred = COND_JMP_PRED_TRUE;
2917                 }
2918                 set_Cond_jmp_pred(cond, pred);
2919         }
2920
2921         add_immBlock_pred(true_block, true_proj);
2922         add_immBlock_pred(false_block, false_proj);
2923
2924         set_cur_block(NULL);
2925 }
2926
2927
2928
2929 static void create_declaration_entity(declaration_t *declaration,
2930                                       declaration_kind_t declaration_kind,
2931                                       ir_type *parent_type)
2932 {
2933         ident     *const id     = new_id_from_str(declaration->symbol->string);
2934         type_t    *const type   = skip_typeref(declaration->type);
2935         ir_type   *const irtype = get_ir_type(type);
2936         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2937         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2938         mangle_ent_from_decl(entity, declaration);
2939
2940         declaration->declaration_kind = (unsigned char) declaration_kind;
2941         declaration->v.entity         = entity;
2942         set_entity_variability(entity, variability_uninitialized);
2943         if(parent_type == get_tls_type())
2944                 set_entity_allocation(entity, allocation_automatic);
2945         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2946                 set_entity_allocation(entity, allocation_static);
2947
2948         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
2949                 set_entity_volatility(entity, volatility_is_volatile);
2950         }
2951 }
2952
2953
2954 typedef struct type_path_entry_t type_path_entry_t;
2955 struct type_path_entry_t {
2956         type_t           *type;
2957         ir_initializer_t *initializer;
2958         size_t            index;
2959         declaration_t    *compound_entry;
2960 };
2961
2962 typedef struct type_path_t type_path_t;
2963 struct type_path_t {
2964         type_path_entry_t *path;
2965         type_t            *top_type;
2966         bool               invalid;
2967 };
2968
2969 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2970 {
2971         size_t len = ARR_LEN(path->path);
2972
2973         for(size_t i = 0; i < len; ++i) {
2974                 const type_path_entry_t *entry = & path->path[i];
2975
2976                 type_t *type = skip_typeref(entry->type);
2977                 if(is_type_compound(type)) {
2978                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2979                 } else if(is_type_array(type)) {
2980                         fprintf(stderr, "[%zd]", entry->index);
2981                 } else {
2982                         fprintf(stderr, "-INVALID-");
2983                 }
2984         }
2985         fprintf(stderr, "  (");
2986         print_type(path->top_type);
2987         fprintf(stderr, ")");
2988 }
2989
2990 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2991 {
2992         size_t len = ARR_LEN(path->path);
2993         assert(len > 0);
2994         return & path->path[len-1];
2995 }
2996
2997 static type_path_entry_t *append_to_type_path(type_path_t *path)
2998 {
2999         size_t len = ARR_LEN(path->path);
3000         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3001
3002         type_path_entry_t *result = & path->path[len];
3003         memset(result, 0, sizeof(result[0]));
3004         return result;
3005 }
3006
3007 static size_t get_compound_size(const compound_type_t *type)
3008 {
3009         declaration_t *declaration = type->declaration;
3010         declaration_t *member      = declaration->scope.declarations;
3011         size_t         size        = 0;
3012         for( ; member != NULL; member = member->next) {
3013                 ++size;
3014         }
3015         /* TODO: cache results? */
3016
3017         return size;
3018 }
3019
3020 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3021 {
3022         type_t *orig_top_type = path->top_type;
3023         type_t *top_type      = skip_typeref(orig_top_type);
3024
3025         assert(is_type_compound(top_type) || is_type_array(top_type));
3026
3027         if(ARR_LEN(path->path) == 0) {
3028                 return NULL;
3029         } else {
3030                 type_path_entry_t *top         = get_type_path_top(path);
3031                 ir_initializer_t  *initializer = top->initializer;
3032                 return get_initializer_compound_value(initializer, top->index);
3033         }
3034 }
3035
3036 static void descend_into_subtype(type_path_t *path)
3037 {
3038         type_t *orig_top_type = path->top_type;
3039         type_t *top_type      = skip_typeref(orig_top_type);
3040
3041         assert(is_type_compound(top_type) || is_type_array(top_type));
3042
3043         ir_initializer_t *initializer = get_initializer_entry(path);
3044
3045         type_path_entry_t *top = append_to_type_path(path);
3046         top->type              = top_type;
3047
3048         size_t len;
3049
3050         if(is_type_compound(top_type)) {
3051                 declaration_t *declaration = top_type->compound.declaration;
3052                 declaration_t *entry       = declaration->scope.declarations;
3053
3054                 top->compound_entry = entry;
3055                 top->index          = 0;
3056                 len                 = get_compound_size(&top_type->compound);
3057                 if(entry != NULL)
3058                         path->top_type = entry->type;
3059         } else {
3060                 assert(is_type_array(top_type));
3061                 assert(top_type->array.size > 0);
3062
3063                 top->index     = 0;
3064                 path->top_type = top_type->array.element_type;
3065                 len            = top_type->array.size;
3066         }
3067         if(initializer == NULL
3068                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3069                 initializer = create_initializer_compound(len);
3070                 /* we have to set the entry at the 2nd latest path entry... */
3071                 size_t path_len = ARR_LEN(path->path);
3072                 assert(path_len >= 1);
3073                 if(path_len > 1) {
3074                         type_path_entry_t *entry        = & path->path[path_len-2];
3075                         ir_initializer_t  *tinitializer = entry->initializer;
3076                         set_initializer_compound_value(tinitializer, entry->index,
3077                                                        initializer);
3078                 }
3079         }
3080         top->initializer = initializer;
3081 }
3082
3083 static void ascend_from_subtype(type_path_t *path)
3084 {
3085         type_path_entry_t *top = get_type_path_top(path);
3086
3087         path->top_type = top->type;
3088
3089         size_t len = ARR_LEN(path->path);
3090         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3091 }
3092
3093 static void walk_designator(type_path_t *path, const designator_t *designator)
3094 {
3095         /* designators start at current object type */
3096         ARR_RESIZE(type_path_entry_t, path->path, 1);
3097
3098         for( ; designator != NULL; designator = designator->next) {
3099                 type_path_entry_t *top         = get_type_path_top(path);
3100                 type_t            *orig_type   = top->type;
3101                 type_t            *type        = skip_typeref(orig_type);
3102
3103                 if(designator->symbol != NULL) {
3104                         assert(is_type_compound(type));
3105                         size_t    index  = 0;
3106                         symbol_t *symbol = designator->symbol;
3107
3108                         declaration_t *declaration = type->compound.declaration;
3109                         declaration_t *iter        = declaration->scope.declarations;
3110                         for( ; iter != NULL; iter = iter->next, ++index) {
3111                                 if(iter->symbol == symbol) {
3112                                         break;
3113                                 }
3114                         }
3115                         assert(iter != NULL);
3116
3117                         top->type           = orig_type;
3118                         top->compound_entry = iter;
3119                         top->index          = index;
3120                         orig_type           = iter->type;
3121                 } else {
3122                         expression_t *array_index = designator->array_index;
3123                         assert(designator->array_index != NULL);
3124                         assert(is_type_array(type));
3125                         assert(is_type_valid(array_index->base.type));
3126
3127                         long index = fold_constant(array_index);
3128                         assert(index >= 0);
3129 #ifndef NDEBUG
3130                         if(type->array.size_constant == 1) {
3131                                 long array_size = type->array.size;
3132                                 assert(index < array_size);
3133                         }
3134 #endif
3135
3136                         top->type  = orig_type;
3137                         top->index = (size_t) index;
3138                         orig_type  = type->array.element_type;
3139                 }
3140                 path->top_type = orig_type;
3141
3142                 if(designator->next != NULL) {
3143                         descend_into_subtype(path);
3144                 }
3145         }
3146
3147         path->invalid  = false;
3148 }
3149
3150 static void advance_current_object(type_path_t *path)
3151 {
3152         if(path->invalid) {
3153                 /* TODO: handle this... */
3154                 panic("invalid initializer in ast2firm (excessive elements)");
3155                 return;
3156         }
3157
3158         type_path_entry_t *top = get_type_path_top(path);
3159
3160         type_t *type = skip_typeref(top->type);
3161         if(is_type_union(type)) {
3162                 top->compound_entry = NULL;
3163         } else if(is_type_struct(type)) {
3164                 declaration_t *entry = top->compound_entry;
3165
3166                 top->index++;
3167                 entry               = entry->next;
3168                 top->compound_entry = entry;
3169                 if(entry != NULL) {
3170                         path->top_type = entry->type;
3171                         return;
3172                 }
3173         } else {
3174                 assert(is_type_array(type));
3175
3176                 top->index++;
3177                 if(!type->array.size_constant || top->index < type->array.size) {
3178                         return;
3179                 }
3180         }
3181
3182         /* we're past the last member of the current sub-aggregate, try if we
3183          * can ascend in the type hierarchy and continue with another subobject */
3184         size_t len = ARR_LEN(path->path);
3185
3186         if(len > 1) {
3187                 ascend_from_subtype(path);
3188                 advance_current_object(path);
3189         } else {
3190                 path->invalid = true;
3191         }
3192 }
3193
3194
3195 static ir_initializer_t *create_ir_initializer(
3196                 const initializer_t *initializer, type_t *type);
3197
3198 static ir_initializer_t *create_ir_initializer_value(
3199                 const initializer_value_t *initializer)
3200 {
3201         ir_node *value = expression_to_firm(initializer->value);
3202         return create_initializer_const(value);
3203 }
3204
3205 static ir_initializer_t *create_ir_initializer_list(
3206                 const initializer_list_t *initializer, type_t *type)
3207 {
3208         type_path_t path;
3209         memset(&path, 0, sizeof(path));
3210         path.top_type = type;
3211         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3212
3213         descend_into_subtype(&path);
3214
3215         for(size_t i = 0; i < initializer->len; ++i) {
3216                 const initializer_t *sub_initializer = initializer->initializers[i];
3217
3218                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3219                         walk_designator(&path, sub_initializer->designator.designator);
3220                         continue;
3221                 }
3222
3223                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3224                         /* we might have to descend into types until we're at a scalar
3225                          * type */
3226                         while(true) {
3227                                 type_t *orig_top_type = path.top_type;
3228                                 type_t *top_type      = skip_typeref(orig_top_type);
3229
3230                                 if(is_type_scalar(top_type))
3231                                         break;
3232                                 descend_into_subtype(&path);
3233                         }
3234                 }
3235
3236                 ir_initializer_t *sub_irinitializer
3237                         = create_ir_initializer(sub_initializer, path.top_type);
3238
3239                 size_t path_len = ARR_LEN(path.path);
3240                 assert(path_len >= 1);
3241                 type_path_entry_t *entry        = & path.path[path_len-1];
3242                 ir_initializer_t  *tinitializer = entry->initializer;
3243                 set_initializer_compound_value(tinitializer, entry->index,
3244                                                sub_irinitializer);
3245
3246                 advance_current_object(&path);
3247         }
3248
3249         assert(ARR_LEN(path.path) >= 1);
3250         ir_initializer_t *result = path.path[0].initializer;
3251         DEL_ARR_F(path.path);
3252
3253         return result;
3254 }
3255
3256 static ir_initializer_t *create_ir_initializer_string(
3257                 const initializer_string_t *initializer, type_t *type)
3258 {
3259         type = skip_typeref(type);
3260
3261         size_t            string_len    = initializer->string.size;
3262         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3263         size_t            len           = type->array.size;
3264         ir_initializer_t *irinitializer = create_initializer_compound(len);
3265
3266         const char *string = initializer->string.begin;
3267         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3268
3269         for(size_t i = 0; i < len; ++i) {
3270                 char c = 0;
3271                 if(i < string_len)
3272                         c = string[i];
3273
3274                 tarval           *tv = new_tarval_from_long(string[i], mode);
3275                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3276
3277                 set_initializer_compound_value(irinitializer, i, char_initializer);
3278         }
3279
3280         return irinitializer;
3281 }
3282
3283 static ir_initializer_t *create_ir_initializer_wide_string(
3284                 const initializer_wide_string_t *initializer, type_t *type)
3285 {
3286         size_t            string_len    = initializer->string.size;
3287         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3288         size_t            len           = type->array.size;
3289         ir_initializer_t *irinitializer = create_initializer_compound(len);
3290
3291         const wchar_rep_t *string = initializer->string.begin;
3292         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3293
3294         for(size_t i = 0; i < len; ++i) {
3295                 wchar_rep_t c = 0;
3296                 if(i < string_len) {
3297                         c = string[i];
3298                 }
3299                 tarval *tv = new_tarval_from_long(string[i], mode);
3300                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3301
3302                 set_initializer_compound_value(irinitializer, i, char_initializer);
3303         }
3304
3305         return irinitializer;
3306 }
3307
3308 static ir_initializer_t *create_ir_initializer(
3309                 const initializer_t *initializer, type_t *type)
3310 {
3311         switch(initializer->kind) {
3312                 case INITIALIZER_STRING:
3313                         return create_ir_initializer_string(&initializer->string, type);
3314
3315                 case INITIALIZER_WIDE_STRING:
3316                         return create_ir_initializer_wide_string(&initializer->wide_string,
3317                                                                  type);
3318
3319                 case INITIALIZER_LIST:
3320                         return create_ir_initializer_list(&initializer->list, type);
3321
3322                 case INITIALIZER_VALUE:
3323                         return create_ir_initializer_value(&initializer->value);
3324
3325                 case INITIALIZER_DESIGNATOR:
3326                         panic("unexpected designator initializer found");
3327         }
3328         panic("unknown initializer");
3329 }
3330
3331 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3332                                             ir_node *base_addr)
3333 {
3334         ir_mode *mode = get_type_mode(type);
3335         tarval  *zero = get_mode_null(mode);
3336         ir_node *cnst = new_d_Const(dbgi, mode, zero);
3337
3338         /* TODO: bitfields */
3339         ir_node *mem    = get_store();
3340         ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3341         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3342         set_store(proj_m);
3343 }
3344
3345 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3346                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3347 {
3348         switch(get_initializer_kind(initializer)) {
3349         case IR_INITIALIZER_NULL: {
3350                 /* TODO: implement this for compound types... */
3351                 assert(type != NULL);
3352
3353                 ir_mode *mode = get_type_mode(type);
3354                 tarval  *zero = get_mode_null(mode);
3355                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3356
3357                 /* TODO: bitfields */
3358                 ir_node *mem    = get_store();
3359                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3360                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3361                 set_store(proj_m);
3362                 return;
3363         }
3364         case IR_INITIALIZER_CONST: {
3365                 ir_node *node = get_initializer_const_value(initializer);
3366                 ir_mode *mode = get_irn_mode(node);
3367                 assert(get_type_mode(type) == mode);
3368
3369                 /* TODO: bitfields... */
3370                 ir_node *mem    = get_store();
3371                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3372                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3373                 set_store(proj_m);
3374                 return;
3375         }
3376         case IR_INITIALIZER_TARVAL: {
3377                 tarval  *tv   = get_initializer_tarval_value(initializer);
3378                 ir_mode *mode = get_tarval_mode(tv);
3379                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3380                 assert(get_type_mode(type) == mode);
3381
3382                 /* TODO: bitfields... */
3383                 ir_node *mem    = get_store();
3384                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3385                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3386                 set_store(proj_m);
3387                 return;
3388         }
3389         case IR_INITIALIZER_COMPOUND: {
3390                 assert(is_compound_type(type));
3391                 int n_members;
3392                 if(is_Array_type(type)) {
3393                         assert(has_array_upper_bound(type, 0));
3394                         n_members = get_array_upper_bound_int(type, 0);
3395                 } else {
3396                         n_members = get_compound_n_members(type);
3397                 }
3398
3399                 if(get_initializer_compound_n_entries(initializer)
3400                                 != (unsigned) n_members)
3401                         panic("initializer doesn't match compound type");
3402
3403                 for(int i = 0; i < n_members; ++i) {
3404                         ir_node *addr;
3405                         ir_type *irtype;
3406                         if(is_Array_type(type)) {
3407                                 ir_entity *entity   = get_array_element_entity(type);
3408                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3409                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3410                                 ir_node   *in[1]    = { cnst };
3411                                 irtype = get_array_element_type(type);
3412                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3413                         } else {
3414                                 ir_entity *member = get_compound_member(type, i);
3415
3416                                 irtype = get_entity_type(member);
3417                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3418                         }
3419
3420                         ir_initializer_t *sub_init
3421                                 = get_initializer_compound_value(initializer, i);
3422
3423                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3424                 }
3425                 return;
3426         }
3427         }
3428
3429         panic("invalid IR_INITIALIZER found");
3430 }
3431
3432 static void create_dynamic_initializer(ir_initializer_t *initializer,
3433                 dbg_info *dbgi, ir_entity *entity)
3434 {
3435         ir_node *frame     = get_local_frame(entity);
3436         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3437         ir_type *type      = get_entity_type(entity);
3438
3439         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3440 }
3441
3442 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3443                                      ir_entity *entity, type_t *type)
3444 {
3445         ir_node *memory = get_store();
3446         ir_node *nomem  = new_NoMem();
3447         ir_node *frame  = get_irg_frame(current_ir_graph);
3448         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3449
3450         if(initializer->kind == INITIALIZER_VALUE) {
3451                 initializer_value_t *initializer_value = &initializer->value;
3452
3453                 ir_node *value = expression_to_firm(initializer_value->value);
3454                 type = skip_typeref(type);
3455                 assign_value(dbgi, addr, type, value);
3456                 return;
3457         }
3458
3459         if(!is_constant_initializer(initializer)) {
3460                 ir_initializer_t *irinitializer
3461                         = create_ir_initializer(initializer, type);
3462
3463                 create_dynamic_initializer(irinitializer, dbgi, entity);
3464                 return;
3465         }
3466
3467         /* create the ir_initializer */
3468         ir_graph *const old_current_ir_graph = current_ir_graph;
3469         current_ir_graph = get_const_code_irg();
3470
3471         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3472
3473         assert(current_ir_graph == get_const_code_irg());
3474         current_ir_graph = old_current_ir_graph;
3475
3476         /* create a "template" entity which is copied to the entity on the stack */
3477         ident     *const id          = unique_ident("initializer");
3478         ir_type   *const irtype      = get_ir_type(type);
3479         ir_type   *const global_type = get_glob_type();
3480         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3481         set_entity_ld_ident(init_entity, id);
3482
3483         set_entity_variability(init_entity, variability_initialized);
3484         set_entity_visibility(init_entity, visibility_local);
3485         set_entity_allocation(init_entity, allocation_static);
3486
3487         set_entity_initializer(init_entity, irinitializer);
3488
3489         ir_node *const src_addr = create_global(dbgi, mode_P_data, init_entity);
3490         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3491
3492         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3493         set_store(copyb_mem);
3494 }
3495
3496 static void create_initializer_local_variable_entity(declaration_t *declaration)
3497 {
3498         initializer_t *initializer = declaration->init.initializer;
3499         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3500         ir_entity     *entity      = declaration->v.entity;
3501         type_t        *type        = declaration->type;
3502         create_local_initializer(initializer, dbgi, entity, type);
3503 }
3504
3505 static void create_declaration_initializer(declaration_t *declaration)
3506 {
3507         initializer_t *initializer = declaration->init.initializer;
3508         if(initializer == NULL)
3509                 return;
3510
3511         declaration_kind_t declaration_kind
3512                 = (declaration_kind_t) declaration->declaration_kind;
3513         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3514                 create_initializer_local_variable_entity(declaration);
3515                 return;
3516         }
3517
3518         if(initializer->kind == INITIALIZER_VALUE) {
3519                 initializer_value_t *initializer_value = &initializer->value;
3520
3521                 ir_node *value = expression_to_firm(initializer_value->value);
3522
3523                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3524                         set_value(declaration->v.value_number, value);
3525                 } else {
3526                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3527
3528                         ir_entity *entity = declaration->v.entity;
3529
3530                         set_entity_variability(entity, variability_initialized);
3531                         set_atomic_ent_value(entity, value);
3532                 }
3533         } else {
3534                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3535                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3536
3537                 ir_entity        *entity        = declaration->v.entity;
3538                 ir_initializer_t *irinitializer
3539                         = create_ir_initializer(initializer, declaration->type);
3540
3541                 set_entity_variability(entity, variability_initialized);
3542                 set_entity_initializer(entity, irinitializer);
3543         }
3544 }
3545
3546 static void create_variable_length_array(declaration_t *declaration)
3547 {
3548         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3549         type_t   *type      = declaration->type;
3550         ir_node  *mem       = get_store();
3551         ir_type  *el_type   = get_ir_type(type->array.element_type);
3552
3553         /* make sure size_node is calculated */
3554         get_type_size(type);
3555         ir_node  *elems = type->array.size_node;
3556         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3557
3558         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3559         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3560         set_store(proj_m);
3561
3562         /* initializers are not allowed for VLAs */
3563         assert(declaration->init.initializer == NULL);
3564
3565         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3566         declaration->v.vla_base       = addr;
3567
3568         /* TODO: record VLA somewhere so we create the free node when we leave
3569          * it's scope */
3570 }
3571
3572 /**
3573  * Creates a Firm local variable from a declaration.
3574  */
3575 static void create_local_variable(declaration_t *declaration)
3576 {
3577         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3578
3579         bool needs_entity = declaration->address_taken;
3580         type_t *type = skip_typeref(declaration->type);
3581
3582         /* is it a variable length array? */
3583         if(is_type_array(type) && !type->array.size_constant) {
3584                 create_variable_length_array(declaration);
3585                 return;
3586         } else if(is_type_array(type) || is_type_compound(type)) {
3587                 needs_entity = true;
3588         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3589                 needs_entity = true;
3590         }
3591
3592         if(needs_entity) {
3593                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3594                 create_declaration_entity(declaration,
3595                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3596                                           frame_type);
3597         } else {
3598                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3599                 declaration->v.value_number   = next_value_number_function;
3600                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3601                 ++next_value_number_function;
3602         }
3603
3604         create_declaration_initializer(declaration);
3605 }
3606
3607 static void create_local_static_variable(declaration_t *declaration)
3608 {
3609         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3610
3611         type_t    *const type        = skip_typeref(declaration->type);
3612         ir_type   *const global_type = get_glob_type();
3613         ident     *const id          = unique_ident(declaration->symbol->string);
3614         ir_type   *const irtype      = get_ir_type(type);
3615         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3616         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3617         mangle_ent_from_decl(entity, declaration);
3618
3619         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3620                 set_entity_volatility(entity, volatility_is_volatile);
3621         }
3622
3623         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3624         declaration->v.entity         = entity;
3625         set_entity_variability(entity, variability_uninitialized);
3626         set_entity_visibility(entity, visibility_local);
3627         set_entity_allocation(entity, allocation_static);
3628
3629         ir_graph *const old_current_ir_graph = current_ir_graph;
3630         current_ir_graph = get_const_code_irg();
3631
3632         create_declaration_initializer(declaration);
3633
3634         assert(current_ir_graph == get_const_code_irg());
3635         current_ir_graph = old_current_ir_graph;
3636 }
3637
3638
3639
3640 static void return_statement_to_firm(return_statement_t *statement)
3641 {
3642         if(get_cur_block() == NULL)
3643                 return;
3644
3645         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3646         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3647
3648
3649         ir_node *in[1];
3650         int      in_len;
3651         if(get_method_n_ress(func_irtype) > 0) {
3652                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3653
3654                 if(statement->value != NULL) {
3655                         ir_node *node = expression_to_firm(statement->value);
3656                         node  = do_strict_conv(dbgi, node);
3657                         in[0] = node;
3658                 } else {
3659                         ir_mode *mode;
3660                         if(is_compound_type(res_type)) {
3661                                 mode = mode_P_data;
3662                         } else {
3663                                 mode = get_type_mode(res_type);
3664                         }
3665                         in[0] = new_Unknown(mode);
3666                 }
3667                 in_len = 1;
3668         } else {
3669                 /* build return_value for its side effects */
3670                 if(statement->value != NULL) {
3671                         expression_to_firm(statement->value);
3672                 }
3673                 in_len = 0;
3674         }
3675
3676         ir_node  *store = get_store();
3677         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3678
3679         ir_node *end_block = get_irg_end_block(current_ir_graph);
3680         add_immBlock_pred(end_block, ret);
3681
3682         set_cur_block(NULL);
3683 }
3684
3685 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3686 {
3687         if(get_cur_block() == NULL)
3688                 return NULL;
3689
3690         return expression_to_firm(statement->expression);
3691 }
3692
3693 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3694 {
3695         ir_node     *result    = NULL;
3696         statement_t *statement = compound->statements;
3697         for( ; statement != NULL; statement = statement->base.next) {
3698                 //context2firm(&statement->scope);
3699
3700                 if(statement->base.next == NULL
3701                                 && statement->kind == STATEMENT_EXPRESSION) {
3702                         result = expression_statement_to_firm(
3703                                         &statement->expression);
3704                         break;
3705                 }
3706                 statement_to_firm(statement);
3707         }
3708
3709         return result;
3710 }
3711
3712 static void create_global_variable(declaration_t *declaration)
3713 {
3714         ir_visibility  vis;
3715         ir_type       *var_type;
3716         switch ((storage_class_tag_t)declaration->storage_class) {
3717                 case STORAGE_CLASS_STATIC:
3718                         vis = visibility_local;
3719                         goto global_var;
3720
3721                 case STORAGE_CLASS_EXTERN:
3722                         vis = visibility_external_allocated;
3723                         goto global_var;
3724
3725                 case STORAGE_CLASS_NONE:
3726                         vis = visibility_external_visible;
3727                         goto global_var;
3728
3729                 case STORAGE_CLASS_THREAD:
3730                         vis = visibility_external_visible;
3731                         goto tls_var;
3732
3733                 case STORAGE_CLASS_THREAD_EXTERN:
3734                         vis = visibility_external_allocated;
3735                         goto tls_var;
3736
3737                 case STORAGE_CLASS_THREAD_STATIC:
3738                         vis = visibility_local;
3739                         goto tls_var;
3740
3741 tls_var:
3742                         var_type = get_tls_type();
3743                         goto create_var;
3744
3745 global_var:
3746                         var_type = get_glob_type();
3747                         goto create_var;
3748
3749 create_var:
3750                         create_declaration_entity(declaration,
3751                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3752                                                   var_type);
3753                         set_entity_visibility(declaration->v.entity, vis);
3754
3755                         return;
3756
3757                 case STORAGE_CLASS_TYPEDEF:
3758                 case STORAGE_CLASS_AUTO:
3759                 case STORAGE_CLASS_REGISTER:
3760                 case STORAGE_CLASS_ENUM_ENTRY:
3761                         break;
3762         }
3763         panic("Invalid storage class for global variable");
3764 }
3765
3766 static void create_local_declaration(declaration_t *declaration)
3767 {
3768         if(declaration->symbol == NULL)
3769                 return;
3770
3771         type_t *type = skip_typeref(declaration->type);
3772
3773         switch ((storage_class_tag_t) declaration->storage_class) {
3774         case STORAGE_CLASS_STATIC:
3775                 create_local_static_variable(declaration);
3776                 return;
3777         case STORAGE_CLASS_EXTERN:
3778                 create_global_variable(declaration);
3779                 create_declaration_initializer(declaration);
3780                 return;
3781         case STORAGE_CLASS_NONE:
3782         case STORAGE_CLASS_AUTO:
3783         case STORAGE_CLASS_REGISTER:
3784                 if(is_type_function(type)) {
3785                         if(declaration->init.statement != NULL) {
3786                                 panic("nested functions not supported yet");
3787                         } else {
3788                                 get_function_entity(declaration);
3789                         }
3790                 } else {
3791                         create_local_variable(declaration);
3792                 }
3793                 return;
3794         case STORAGE_CLASS_ENUM_ENTRY:
3795         case STORAGE_CLASS_TYPEDEF:
3796         case STORAGE_CLASS_THREAD:
3797         case STORAGE_CLASS_THREAD_EXTERN:
3798         case STORAGE_CLASS_THREAD_STATIC:
3799                 return;
3800         }
3801         panic("invalid storage class found");
3802 }
3803
3804 static void declaration_statement_to_firm(declaration_statement_t *statement)
3805 {
3806         declaration_t *declaration = statement->declarations_begin;
3807         declaration_t *end         = statement->declarations_end->next;
3808         for( ; declaration != end; declaration = declaration->next) {
3809                 if(declaration->namespc != NAMESPACE_NORMAL)
3810                         continue;
3811                 create_local_declaration(declaration);
3812         }
3813 }
3814
3815 static void if_statement_to_firm(if_statement_t *statement)
3816 {
3817         ir_node *cur_block = get_cur_block();
3818
3819         ir_node *fallthrough_block = new_immBlock();
3820
3821         /* the true (blocks) */
3822         ir_node *true_block;
3823         if (statement->true_statement != NULL) {
3824                 true_block = new_immBlock();
3825                 statement_to_firm(statement->true_statement);
3826                 if(get_cur_block() != NULL) {
3827                         ir_node *jmp = new_Jmp();
3828                         add_immBlock_pred(fallthrough_block, jmp);
3829                 }
3830         } else {
3831                 true_block = fallthrough_block;
3832         }
3833
3834         /* the false (blocks) */
3835         ir_node *false_block;
3836         if(statement->false_statement != NULL) {
3837                 false_block = new_immBlock();
3838
3839                 statement_to_firm(statement->false_statement);
3840                 if(get_cur_block() != NULL) {
3841                         ir_node *jmp = new_Jmp();
3842                         add_immBlock_pred(fallthrough_block, jmp);
3843                 }
3844         } else {
3845                 false_block = fallthrough_block;
3846         }
3847
3848         /* create the condition */
3849         if(cur_block != NULL) {
3850                 set_cur_block(cur_block);
3851                 create_condition_evaluation(statement->condition, true_block,
3852                                             false_block);
3853         }
3854
3855         mature_immBlock(true_block);
3856         if(false_block != fallthrough_block) {
3857                 mature_immBlock(false_block);
3858         }
3859         mature_immBlock(fallthrough_block);
3860
3861         set_cur_block(fallthrough_block);
3862 }
3863
3864 static void while_statement_to_firm(while_statement_t *statement)
3865 {
3866         ir_node *jmp = NULL;
3867         if(get_cur_block() != NULL) {
3868                 jmp = new_Jmp();
3869         }
3870
3871         /* create the header block */
3872         ir_node *header_block = new_immBlock();
3873         if(jmp != NULL) {
3874                 add_immBlock_pred(header_block, jmp);
3875         }
3876
3877         /* the false block */
3878         ir_node *false_block = new_immBlock();
3879
3880         /* the loop body */
3881         ir_node *body_block;
3882         if (statement->body != NULL) {
3883                 ir_node *old_continue_label = continue_label;
3884                 ir_node *old_break_label    = break_label;
3885                 continue_label              = header_block;
3886                 break_label                 = false_block;
3887
3888                 body_block = new_immBlock();
3889                 statement_to_firm(statement->body);
3890
3891                 assert(continue_label == header_block);
3892                 assert(break_label    == false_block);
3893                 continue_label = old_continue_label;
3894                 break_label    = old_break_label;
3895
3896                 if(get_cur_block() != NULL) {
3897                         jmp = new_Jmp();
3898                         add_immBlock_pred(header_block, jmp);
3899                 }
3900         } else {
3901                 body_block = header_block;
3902         }
3903
3904         /* create the condition */
3905         set_cur_block(header_block);
3906
3907         create_condition_evaluation(statement->condition, body_block, false_block);
3908         mature_immBlock(body_block);
3909         mature_immBlock(false_block);
3910         mature_immBlock(header_block);
3911
3912         set_cur_block(false_block);
3913 }
3914
3915 static void do_while_statement_to_firm(do_while_statement_t *statement)
3916 {
3917         ir_node *jmp = NULL;
3918         if(get_cur_block() != NULL) {
3919                 jmp = new_Jmp();
3920         }
3921
3922         /* create the header block */
3923         ir_node *header_block = new_immBlock();
3924
3925         /* the false block */
3926         ir_node *false_block = new_immBlock();
3927
3928         /* the loop body */
3929         ir_node *body_block = new_immBlock();
3930         if(jmp != NULL) {
3931                 add_immBlock_pred(body_block, jmp);
3932         }
3933
3934         if (statement->body != NULL) {
3935                 ir_node *old_continue_label = continue_label;
3936                 ir_node *old_break_label    = break_label;
3937                 continue_label              = header_block;
3938                 break_label                 = false_block;
3939
3940                 statement_to_firm(statement->body);
3941
3942                 assert(continue_label == header_block);
3943                 assert(break_label    == false_block);
3944                 continue_label = old_continue_label;
3945                 break_label    = old_break_label;
3946
3947                 if (get_cur_block() == NULL) {
3948                         mature_immBlock(header_block);
3949                         mature_immBlock(body_block);
3950                         mature_immBlock(false_block);
3951                         return;
3952                 }
3953         }
3954
3955         ir_node *body_jmp = new_Jmp();
3956         add_immBlock_pred(header_block, body_jmp);
3957         mature_immBlock(header_block);
3958
3959         /* create the condition */
3960         set_cur_block(header_block);
3961
3962         create_condition_evaluation(statement->condition, body_block, false_block);
3963         mature_immBlock(body_block);
3964         mature_immBlock(false_block);
3965         mature_immBlock(header_block);
3966
3967         set_cur_block(false_block);
3968 }
3969
3970 static void for_statement_to_firm(for_statement_t *statement)
3971 {
3972         ir_node *jmp = NULL;
3973         if (get_cur_block() != NULL) {
3974                 if(statement->initialisation != NULL) {
3975                         expression_to_firm(statement->initialisation);
3976                 }
3977
3978                 /* create declarations */
3979                 declaration_t *declaration = statement->scope.declarations;
3980                 for( ; declaration != NULL; declaration = declaration->next) {
3981                         create_local_declaration(declaration);
3982                 }
3983
3984                 jmp = new_Jmp();
3985         }
3986
3987
3988         /* create the step block */
3989         ir_node *const step_block = new_immBlock();
3990         if (statement->step != NULL) {
3991                 expression_to_firm(statement->step);
3992         }
3993         ir_node *const step_jmp = new_Jmp();
3994
3995         /* create the header block */
3996         ir_node *const header_block = new_immBlock();
3997         if (jmp != NULL) {
3998                 add_immBlock_pred(header_block, jmp);
3999         }
4000         add_immBlock_pred(header_block, step_jmp);
4001
4002         /* the false block */
4003         ir_node *const false_block = new_immBlock();
4004
4005         /* the loop body */
4006         ir_node * body_block;
4007         if (statement->body != NULL) {
4008                 ir_node *const old_continue_label = continue_label;
4009                 ir_node *const old_break_label    = break_label;
4010                 continue_label = step_block;
4011                 break_label    = false_block;
4012
4013                 body_block = new_immBlock();
4014                 statement_to_firm(statement->body);
4015
4016                 assert(continue_label == step_block);
4017                 assert(break_label    == false_block);
4018                 continue_label = old_continue_label;
4019                 break_label    = old_break_label;
4020
4021                 if (get_cur_block() != NULL) {
4022                         jmp = new_Jmp();
4023                         add_immBlock_pred(step_block, jmp);
4024                 }
4025         } else {
4026                 body_block = step_block;
4027         }
4028
4029         /* create the condition */
4030         set_cur_block(header_block);
4031         if (statement->condition != NULL) {
4032                 create_condition_evaluation(statement->condition, body_block,
4033                                             false_block);
4034         } else {
4035                 keep_alive(header_block);
4036                 jmp = new_Jmp();
4037                 add_immBlock_pred(body_block, jmp);
4038         }
4039
4040         mature_immBlock(body_block);
4041         mature_immBlock(false_block);
4042         mature_immBlock(step_block);
4043         mature_immBlock(header_block);
4044         mature_immBlock(false_block);
4045
4046         set_cur_block(false_block);
4047 }
4048
4049 static void create_jump_statement(const statement_t *statement,
4050                                   ir_node *target_block)
4051 {
4052         if(get_cur_block() == NULL)
4053                 return;
4054
4055         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4056         ir_node  *jump = new_d_Jmp(dbgi);
4057         add_immBlock_pred(target_block, jump);
4058
4059         set_cur_block(NULL);
4060 }
4061
4062 static void switch_statement_to_firm(const switch_statement_t *statement)
4063 {
4064         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4065
4066         ir_node *expression  = expression_to_firm(statement->expression);
4067         ir_node *cond        = new_d_Cond(dbgi, expression);
4068         ir_node *break_block = new_immBlock();
4069
4070         set_cur_block(NULL);
4071
4072         ir_node *const old_switch_cond       = current_switch_cond;
4073         ir_node *const old_break_label       = break_label;
4074         const bool     old_saw_default_label = saw_default_label;
4075         current_switch_cond                  = cond;
4076         break_label                          = break_block;
4077
4078         if (statement->body != NULL) {
4079                 statement_to_firm(statement->body);
4080         }
4081
4082         if(get_cur_block() != NULL) {
4083                 ir_node *jmp = new_Jmp();
4084                 add_immBlock_pred(break_block, jmp);
4085         }
4086
4087         if (!saw_default_label) {
4088                 set_cur_block(get_nodes_block(cond));
4089                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4090                                                         MAGIC_DEFAULT_PN_NUMBER);
4091                 add_immBlock_pred(break_block, proj);
4092         }
4093
4094         assert(current_switch_cond == cond);
4095         assert(break_label         == break_block);
4096         current_switch_cond = old_switch_cond;
4097         break_label         = old_break_label;
4098         saw_default_label   = old_saw_default_label;
4099
4100         mature_immBlock(break_block);
4101         set_cur_block(break_block);
4102 }
4103
4104 static void case_label_to_firm(const case_label_statement_t *statement)
4105 {
4106         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4107
4108         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4109
4110         /* let's create a node and hope firm constant folding creates a Const
4111          * node... */
4112         ir_node *proj;
4113         ir_node *old_block = get_nodes_block(current_switch_cond);
4114         ir_node *block     = new_immBlock();
4115
4116         set_cur_block(old_block);
4117         if(statement->expression != NULL) {
4118                 long start_pn = fold_constant(statement->expression);
4119                 long end_pn = start_pn;
4120                 if (statement->end_range != NULL) {
4121                         end_pn = fold_constant(statement->end_range);
4122                 }
4123                 assert(start_pn <= end_pn);
4124                 /* create jumps for all cases in the given range */
4125                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4126                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4127                                 /* oops someone detected our cheating... */
4128                                 panic("magic default pn used");
4129                         }
4130                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4131                         add_immBlock_pred(block, proj);
4132                 }
4133         } else {
4134                 saw_default_label = true;
4135                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4136                                          MAGIC_DEFAULT_PN_NUMBER);
4137
4138                 add_immBlock_pred(block, proj);
4139         }
4140
4141         if (fallthrough != NULL) {
4142                 add_immBlock_pred(block, fallthrough);
4143         }
4144         mature_immBlock(block);
4145         set_cur_block(block);
4146
4147         if(statement->statement != NULL) {
4148                 statement_to_firm(statement->statement);
4149         }
4150 }
4151
4152 static ir_node *get_label_block(declaration_t *label)
4153 {
4154         assert(label->namespc == NAMESPACE_LABEL);
4155
4156         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4157                 return label->v.block;
4158         }
4159         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4160
4161         ir_node *old_cur_block = get_cur_block();
4162         ir_node *block         = new_immBlock();
4163         set_cur_block(old_cur_block);
4164
4165         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4166         label->v.block          = block;
4167
4168         ARR_APP1(ir_node *, imature_blocks, block);
4169
4170         return block;
4171 }
4172
4173 static void label_to_firm(const label_statement_t *statement)
4174 {
4175         ir_node *block = get_label_block(statement->label);
4176
4177         if(get_cur_block() != NULL) {
4178                 ir_node *jmp = new_Jmp();
4179                 add_immBlock_pred(block, jmp);
4180         }
4181
4182         set_cur_block(block);
4183         keep_alive(block);
4184
4185         if(statement->statement != NULL) {
4186                 statement_to_firm(statement->statement);
4187         }
4188 }
4189
4190 static void goto_to_firm(const goto_statement_t *statement)
4191 {
4192         if(get_cur_block() == NULL)
4193                 return;
4194
4195         ir_node *block = get_label_block(statement->label);
4196         ir_node *jmp   = new_Jmp();
4197         add_immBlock_pred(block, jmp);
4198
4199         set_cur_block(NULL);
4200 }
4201
4202 typedef enum modifier_t {
4203         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4204         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4205         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4206         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4207 } modifier_t;
4208
4209 static void asm_statement_to_firm(const asm_statement_t *statement)
4210 {
4211         (void) statement;
4212         fprintf(stderr, "WARNING asm not implemented yet!\n");
4213 #if 0
4214         bool needs_memory = false;
4215
4216         size_t         n_clobbers = 0;
4217         asm_clobber_t *clobber    = statement->clobbers;
4218         for( ; clobber != NULL; clobber = clobber->next) {
4219                 if(strcmp(clobber->clobber, "memory") == 0) {
4220                         needs_memory = true;
4221                         continue;
4222                 }
4223
4224                 ident *id = new_id_from_str(clobber->clobber);
4225                 obstack_ptr_grow(&asm_obst, id);
4226                 ++n_clobbers;
4227         }
4228         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4229         ident **clobbers = NULL;
4230         if(n_clobbers > 0) {
4231                 clobbers = obstack_finish(&asm_obst);
4232         }
4233
4234         /* find and count input and output constraints */
4235         asm_constraint_t *constraint = statement->inputs;
4236         for( ; constraint != NULL; constraint = constraint->next) {
4237                 int  modifiers      = 0;
4238                 bool supports_memop = false;
4239                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4240                         /* TODO: improve error messages */
4241                         switch(*c) {
4242                         case '?':
4243                         case '!':
4244                                 panic("multiple alternative assembler constraints not "
4245                                       "supported");
4246                         case 'm':
4247                         case 'o':
4248                         case 'V':
4249                         case '<':
4250                         case '>':
4251                         case 'X':
4252                                 supports_memop = true;
4253                                 obstack_1grow(&asm_obst, *c);
4254                                 break;
4255                         case '=':
4256                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4257                                         panic("inconsistent register constraints");
4258                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4259                                 break;
4260                         case '+':
4261                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4262                                         panic("inconsistent register constraints");
4263                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4264                                 break;
4265                         case '&':
4266                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4267                                 panic("early clobber assembler constraint not supported yet");
4268                                 break;
4269                         case '%':
4270                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4271                                 panic("commutative assembler constraint not supported yet");
4272                                 break;
4273                         case '#':
4274                                 /* skip register preferences stuff... */
4275                                 while(*c != 0 && *c != ',')
4276                                         ++c;
4277                                 break;
4278                         case '*':
4279                                 /* skip register preferences stuff... */
4280                                 ++c;
4281                                 break;
4282                         default:
4283                                 obstack_1grow(&asm_obst, *c);
4284                                 break;
4285                         }
4286                 }
4287                 obstack_1grow(&asm_obst, '\0');
4288                 const char *constraint_string = obstack_finish(&asm_obst);
4289
4290                 needs_memory |= supports_memop;
4291                 if(supports_memop) {
4292
4293                 }
4294         }
4295 #endif
4296 }
4297
4298 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4299         statement_to_firm(statement->try_statement);
4300         warningf(&statement->base.source_position, "structured exception handling ignored");
4301 }
4302
4303 static void     leave_statement_to_firm(leave_statement_t *statement) {
4304         errorf(&statement->base.source_position, "__leave not supported yet");
4305 }
4306
4307 static void statement_to_firm(statement_t *statement)
4308 {
4309         switch(statement->kind) {
4310         case STATEMENT_INVALID:
4311                 panic("invalid statement found");
4312                 return;
4313         case STATEMENT_EMPTY:
4314                 /* nothing */
4315                 return;
4316         case STATEMENT_COMPOUND:
4317                 compound_statement_to_firm(&statement->compound);
4318                 return;
4319         case STATEMENT_RETURN:
4320                 return_statement_to_firm(&statement->returns);
4321                 return;
4322         case STATEMENT_EXPRESSION:
4323                 expression_statement_to_firm(&statement->expression);
4324                 return;
4325         case STATEMENT_IF:
4326                 if_statement_to_firm(&statement->ifs);
4327                 return;
4328         case STATEMENT_WHILE:
4329                 while_statement_to_firm(&statement->whiles);
4330                 return;
4331         case STATEMENT_DO_WHILE:
4332                 do_while_statement_to_firm(&statement->do_while);
4333                 return;
4334         case STATEMENT_DECLARATION:
4335                 declaration_statement_to_firm(&statement->declaration);
4336                 return;
4337         case STATEMENT_BREAK:
4338                 create_jump_statement(statement, break_label);
4339                 return;
4340         case STATEMENT_CONTINUE:
4341                 create_jump_statement(statement, continue_label);
4342                 return;
4343         case STATEMENT_SWITCH:
4344                 switch_statement_to_firm(&statement->switchs);
4345                 return;
4346         case STATEMENT_CASE_LABEL:
4347                 case_label_to_firm(&statement->case_label);
4348                 return;
4349         case STATEMENT_FOR:
4350                 for_statement_to_firm(&statement->fors);
4351                 return;
4352         case STATEMENT_LABEL:
4353                 label_to_firm(&statement->label);
4354                 return;
4355         case STATEMENT_GOTO:
4356                 goto_to_firm(&statement->gotos);
4357                 return;
4358         case STATEMENT_ASM:
4359                 asm_statement_to_firm(&statement->asms);
4360                 return;
4361         case STATEMENT_MS_TRY:
4362                 ms_try_statement_to_firm(&statement->ms_try);
4363                 return;
4364         case STATEMENT_LEAVE:
4365                 leave_statement_to_firm(&statement->leave);
4366                 return;
4367         }
4368         panic("Statement not implemented\n");
4369 }
4370
4371 static int count_decls_in_expression(const expression_t *expression);
4372
4373 static int count_local_declarations(const declaration_t *      decl,
4374                                     const declaration_t *const end)
4375 {
4376         int count = 0;
4377         for (; decl != end; decl = decl->next) {
4378                 if(decl->namespc != NAMESPACE_NORMAL)
4379                         continue;
4380                 const type_t *type = skip_typeref(decl->type);
4381                 if (!decl->address_taken && is_type_scalar(type))
4382                         ++count;
4383                 const initializer_t *initializer = decl->init.initializer;
4384                 /* FIXME: should walk initializer hierarchies... */
4385                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4386                         count += count_decls_in_expression(initializer->value.value);
4387                 }
4388         }
4389         return count;
4390 }
4391
4392 static int count_decls_in_expression(const expression_t *expression) {
4393         int count = 0;
4394
4395         if(expression == NULL)
4396                 return 0;
4397
4398         switch((expression_kind_t) expression->base.kind) {
4399         case EXPR_STATEMENT:
4400                 return count_decls_in_stmts(expression->statement.statement);
4401         EXPR_BINARY_CASES {
4402                 int count_left  = count_decls_in_expression(expression->binary.left);
4403                 int count_right = count_decls_in_expression(expression->binary.right);
4404                 return count_left + count_right;
4405         }
4406         EXPR_UNARY_CASES
4407                 return count_decls_in_expression(expression->unary.value);
4408         case EXPR_CALL: {
4409                 call_argument_t *argument = expression->call.arguments;
4410                 for( ; argument != NULL; argument = argument->next) {
4411                         count += count_decls_in_expression(argument->expression);
4412                 }
4413                 return count;
4414         }
4415
4416         case EXPR_UNKNOWN:
4417         case EXPR_INVALID:
4418                 panic("unexpected expression kind");
4419
4420         case EXPR_COMPOUND_LITERAL:
4421                 /* TODO... */
4422                 break;
4423
4424         case EXPR_CONDITIONAL:
4425                 count += count_decls_in_expression(expression->conditional.condition);
4426                 count += count_decls_in_expression(expression->conditional.true_expression);
4427                 count += count_decls_in_expression(expression->conditional.false_expression);
4428                 return count;
4429
4430         case EXPR_BUILTIN_PREFETCH:
4431                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4432                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4433                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4434                 return count;
4435
4436         case EXPR_BUILTIN_CONSTANT_P:
4437                 count += count_decls_in_expression(expression->builtin_constant.value);
4438                 return count;
4439
4440         case EXPR_SELECT:
4441                 count += count_decls_in_expression(expression->select.compound);
4442                 return count;
4443
4444         case EXPR_ARRAY_ACCESS:
4445                 count += count_decls_in_expression(expression->array_access.array_ref);
4446                 count += count_decls_in_expression(expression->array_access.index);
4447                 return count;
4448
4449         case EXPR_CLASSIFY_TYPE:
4450                 count += count_decls_in_expression(expression->classify_type.type_expression);
4451                 return count;
4452
4453         case EXPR_SIZEOF:
4454         case EXPR_ALIGNOF: {
4455                 expression_t *tp_expression = expression->typeprop.tp_expression;
4456                 if (tp_expression != NULL) {
4457                         count += count_decls_in_expression(tp_expression);
4458                 }
4459                 return count;
4460         }
4461
4462         case EXPR_OFFSETOF:
4463         case EXPR_REFERENCE:
4464         case EXPR_CONST:
4465         case EXPR_CHARACTER_CONSTANT:
4466         case EXPR_WIDE_CHARACTER_CONSTANT:
4467         case EXPR_STRING_LITERAL:
4468         case EXPR_WIDE_STRING_LITERAL:
4469         case EXPR_FUNCNAME:
4470         case EXPR_BUILTIN_SYMBOL:
4471         case EXPR_VA_START:
4472         case EXPR_VA_ARG:
4473                 break;
4474         }
4475
4476         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4477          * (or implement all the missing expressions here/implement a walker)
4478          */
4479
4480         return 0;
4481 }
4482
4483 static int count_decls_in_stmts(const statement_t *stmt)
4484 {
4485         int count = 0;
4486         for (; stmt != NULL; stmt = stmt->base.next) {
4487                 switch (stmt->kind) {
4488                         case STATEMENT_EMPTY:
4489                                 break;
4490
4491                         case STATEMENT_DECLARATION: {
4492                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4493                                 count += count_local_declarations(decl_stmt->declarations_begin,
4494                                                                   decl_stmt->declarations_end->next);
4495                                 break;
4496                         }
4497
4498                         case STATEMENT_COMPOUND: {
4499                                 const compound_statement_t *const comp =
4500                                         &stmt->compound;
4501                                 count += count_decls_in_stmts(comp->statements);
4502                                 break;
4503                         }
4504
4505                         case STATEMENT_IF: {
4506                                 const if_statement_t *const if_stmt = &stmt->ifs;
4507                                 count += count_decls_in_expression(if_stmt->condition);
4508                                 count += count_decls_in_stmts(if_stmt->true_statement);
4509                                 count += count_decls_in_stmts(if_stmt->false_statement);
4510                                 break;
4511                         }
4512
4513                         case STATEMENT_SWITCH: {
4514                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4515                                 count += count_decls_in_expression(switch_stmt->expression);
4516                                 count += count_decls_in_stmts(switch_stmt->body);
4517                                 break;
4518                         }
4519
4520                         case STATEMENT_LABEL: {
4521                                 const label_statement_t *const label_stmt = &stmt->label;
4522                                 if(label_stmt->statement != NULL) {
4523                                         count += count_decls_in_stmts(label_stmt->statement);
4524                                 }
4525                                 break;
4526                         }
4527
4528                         case STATEMENT_WHILE: {
4529                                 const while_statement_t *const while_stmt = &stmt->whiles;
4530                                 count += count_decls_in_expression(while_stmt->condition);
4531                                 count += count_decls_in_stmts(while_stmt->body);
4532                                 break;
4533                         }
4534
4535                         case STATEMENT_DO_WHILE: {
4536                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4537                                 count += count_decls_in_expression(do_while_stmt->condition);
4538                                 count += count_decls_in_stmts(do_while_stmt->body);
4539                                 break;
4540                         }
4541
4542                         case STATEMENT_FOR: {
4543                                 const for_statement_t *const for_stmt = &stmt->fors;
4544                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4545                                 count += count_decls_in_expression(for_stmt->initialisation);
4546                                 count += count_decls_in_expression(for_stmt->condition);
4547                                 count += count_decls_in_expression(for_stmt->step);
4548                                 count += count_decls_in_stmts(for_stmt->body);
4549                                 break;
4550                         }
4551
4552                         case STATEMENT_CASE_LABEL: {
4553                                 const case_label_statement_t *label = &stmt->case_label;
4554                                 count += count_decls_in_expression(label->expression);
4555                                 if(label->statement != NULL) {
4556                                         count += count_decls_in_stmts(label->statement);
4557                                 }
4558                                 break;
4559                         }
4560
4561                         case STATEMENT_ASM:
4562                         case STATEMENT_BREAK:
4563                         case STATEMENT_CONTINUE:
4564                                 break;
4565
4566                         case STATEMENT_EXPRESSION: {
4567                                 const expression_statement_t *expr_stmt = &stmt->expression;
4568                                 count += count_decls_in_expression(expr_stmt->expression);
4569                                 break;
4570                         }
4571
4572                         case STATEMENT_GOTO:
4573                         case STATEMENT_LEAVE:
4574                         case STATEMENT_INVALID:
4575                                 break;
4576
4577                         case STATEMENT_RETURN: {
4578                                 const return_statement_t *ret_stmt = &stmt->returns;
4579                                 count += count_decls_in_expression(ret_stmt->value);
4580                                 break;
4581                         }
4582
4583                         case STATEMENT_MS_TRY: {
4584                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4585                                 count += count_decls_in_stmts(try_stmt->try_statement);
4586                                 if(try_stmt->except_expression != NULL)
4587                                         count += count_decls_in_expression(try_stmt->except_expression);
4588                                 count += count_decls_in_stmts(try_stmt->final_statement);
4589                                 break;
4590                         }
4591                 }
4592         }
4593         return count;
4594 }
4595
4596 static int get_function_n_local_vars(declaration_t *declaration)
4597 {
4598         int count = 0;
4599
4600         /* count parameters */
4601         count += count_local_declarations(declaration->scope.declarations, NULL);
4602
4603         /* count local variables declared in body */
4604         count += count_decls_in_stmts(declaration->init.statement);
4605
4606         return count;
4607 }
4608
4609 static void initialize_function_parameters(declaration_t *declaration)
4610 {
4611         ir_graph        *irg             = current_ir_graph;
4612         ir_node         *args            = get_irg_args(irg);
4613         ir_node         *start_block     = get_irg_start_block(irg);
4614         ir_type         *function_irtype = get_ir_type(declaration->type);
4615
4616         int            n         = 0;
4617         declaration_t *parameter = declaration->scope.declarations;
4618         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4619                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4620                 type_t *type = skip_typeref(parameter->type);
4621
4622                 bool needs_entity = parameter->address_taken;
4623                 assert(!is_type_array(type));
4624                 if(is_type_compound(type)) {
4625                         needs_entity = true;
4626                 }
4627
4628                 if(needs_entity) {
4629                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4630                         ident     *id     = new_id_from_str(parameter->symbol->string);
4631                         set_entity_ident(entity, id);
4632
4633                         parameter->declaration_kind
4634                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4635                         parameter->v.entity = entity;
4636                         continue;
4637                 }
4638
4639                 ir_mode *mode = get_ir_mode(parameter->type);
4640                 long     pn   = n;
4641                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4642
4643                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4644                 parameter->v.value_number   = next_value_number_function;
4645                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4646                 ++next_value_number_function;
4647
4648                 set_value(parameter->v.value_number, proj);
4649         }
4650 }
4651
4652 /**
4653  * Handle additional decl modifiers for IR-graphs
4654  *
4655  * @param irg            the IR-graph
4656  * @param dec_modifiers  additional modifiers
4657  */
4658 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4659 {
4660         if (decl_modifiers & DM_NORETURN) {
4661                 /* TRUE if the declaration includes the Microsoft
4662                    __declspec(noreturn) specifier. */
4663                 set_irg_additional_property(irg, mtp_property_noreturn);
4664         }
4665         if (decl_modifiers & DM_NOTHROW) {
4666                 /* TRUE if the declaration includes the Microsoft
4667                    __declspec(nothrow) specifier. */
4668                 set_irg_additional_property(irg, mtp_property_nothrow);
4669         }
4670         if (decl_modifiers & DM_NAKED) {
4671                 /* TRUE if the declaration includes the Microsoft
4672                    __declspec(naked) specifier. */
4673                 set_irg_additional_property(irg, mtp_property_naked);
4674         }
4675         if (decl_modifiers & DM_FORCEINLINE) {
4676                 /* TRUE if the declaration includes the
4677                    Microsoft __forceinline specifier. */
4678                 set_irg_inline_property(irg, irg_inline_forced);
4679         }
4680         if (decl_modifiers & DM_NOINLINE) {
4681                 /* TRUE if the declaration includes the Microsoft
4682                    __declspec(noinline) specifier. */
4683                 set_irg_inline_property(irg, irg_inline_forbidden);
4684         }
4685 }
4686
4687 static void create_function(declaration_t *declaration)
4688 {
4689         ir_entity *function_entity = get_function_entity(declaration);
4690
4691         if(declaration->init.statement == NULL)
4692                 return;
4693
4694         current_function_decl = declaration;
4695         current_function_name = NULL;
4696         current_funcsig       = NULL;
4697
4698         assert(imature_blocks == NULL);
4699         imature_blocks = NEW_ARR_F(ir_node*, 0);
4700
4701         int       n_local_vars = get_function_n_local_vars(declaration);
4702         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4703         ir_node  *first_block  = get_cur_block();
4704
4705         /* set inline flags */
4706         if (declaration->is_inline)
4707         set_irg_inline_property(irg, irg_inline_recomended);
4708     handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4709
4710         next_value_number_function = 0;
4711         initialize_function_parameters(declaration);
4712
4713         statement_to_firm(declaration->init.statement);
4714
4715         ir_node *end_block = get_irg_end_block(irg);
4716
4717         /* do we have a return statement yet? */
4718         if(get_cur_block() != NULL) {
4719                 type_t *type = skip_typeref(declaration->type);
4720                 assert(is_type_function(type));
4721                 const function_type_t *func_type   = &type->function;
4722                 const type_t          *return_type
4723                         = skip_typeref(func_type->return_type);
4724
4725                 ir_node *ret;
4726                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4727                         ret = new_Return(get_store(), 0, NULL);
4728                 } else {
4729                         ir_mode *mode;
4730                         if(is_type_scalar(return_type)) {
4731                                 mode = get_ir_mode(func_type->return_type);
4732                         } else {
4733                                 mode = mode_P_data;
4734                         }
4735
4736                         ir_node *in[1];
4737                         /* §5.1.2.2.3 main implicitly returns 0 */
4738                         if (strcmp(declaration->symbol->string, "main") == 0) {
4739                                 in[0] = new_Const(mode, get_mode_null(mode));
4740                         } else {
4741                                 in[0] = new_Unknown(mode);
4742                         }
4743                         ret = new_Return(get_store(), 1, in);
4744                 }
4745                 add_immBlock_pred(end_block, ret);
4746         }
4747
4748         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4749                 mature_immBlock(imature_blocks[i]);
4750         }
4751         DEL_ARR_F(imature_blocks);
4752         imature_blocks = NULL;
4753
4754         mature_immBlock(first_block);
4755         mature_immBlock(end_block);
4756
4757         irg_finalize_cons(irg);
4758
4759         /* finalize the frame type */
4760         ir_type *frame_type = get_irg_frame_type(irg);
4761         int      n          = get_compound_n_members(frame_type);
4762         int      align_all  = 4;
4763         int      offset     = 0;
4764         for(int i = 0; i < n; ++i) {
4765                 ir_entity *entity      = get_compound_member(frame_type, i);
4766                 ir_type   *entity_type = get_entity_type(entity);
4767
4768                 int align = get_type_alignment_bytes(entity_type);
4769                 if(align > align_all)
4770                         align_all = align;
4771                 int misalign = 0;
4772                 if(align > 0) {
4773                         misalign  = offset % align;
4774                         if(misalign > 0) {
4775                                 offset += align - misalign;
4776                         }
4777                 }
4778
4779                 set_entity_offset(entity, offset);
4780                 offset += get_type_size_bytes(entity_type);
4781         }
4782         set_type_size_bytes(frame_type, offset);
4783         set_type_alignment_bytes(frame_type, align_all);
4784
4785         irg_vrfy(irg);
4786 }
4787
4788 static void scope_to_firm(scope_t *scope)
4789 {
4790         /* first pass: create declarations */
4791         declaration_t *declaration = scope->declarations;
4792         for( ; declaration != NULL; declaration = declaration->next) {
4793                 if(declaration->namespc != NAMESPACE_NORMAL)
4794                         continue;
4795                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4796                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4797                         continue;
4798                 if(declaration->symbol == NULL)
4799                         continue;
4800
4801                 type_t *type = skip_typeref(declaration->type);
4802                 if(is_type_function(type)) {
4803                         get_function_entity(declaration);
4804                 } else {
4805                         create_global_variable(declaration);
4806                 }
4807         }
4808
4809         /* second pass: create code/initializers */
4810         declaration = scope->declarations;
4811         for( ; declaration != NULL; declaration = declaration->next) {
4812                 if(declaration->namespc != NAMESPACE_NORMAL)
4813                         continue;
4814                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4815                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4816                         continue;
4817                 if(declaration->symbol == NULL)
4818                         continue;
4819
4820                 type_t *type = declaration->type;
4821                 if(type->kind == TYPE_FUNCTION) {
4822                         create_function(declaration);
4823                 } else {
4824                         assert(declaration->declaration_kind
4825                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4826                         current_ir_graph = get_const_code_irg();
4827                         create_declaration_initializer(declaration);
4828                 }
4829         }
4830 }
4831
4832 void init_ast2firm(void)
4833 {
4834         obstack_init(&asm_obst);
4835         init_atomic_modes();
4836
4837         /* create idents for all known runtime functions */
4838         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4839                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4840         }
4841 }
4842
4843 static void init_ir_types(void)
4844 {
4845         static int ir_types_initialized = 0;
4846         if(ir_types_initialized)
4847                 return;
4848         ir_types_initialized = 1;
4849
4850         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4851         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4852         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4853
4854         ir_type_int        = get_ir_type(type_int);
4855         ir_type_const_char = get_ir_type(type_const_char);
4856         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4857         ir_type_void       = get_ir_type(type_void);
4858 }
4859
4860 void exit_ast2firm(void)
4861 {
4862         obstack_free(&asm_obst, NULL);
4863 }
4864
4865 void translation_unit_to_firm(translation_unit_t *unit)
4866 {
4867         /* just to be sure */
4868         continue_label      = NULL;
4869         break_label         = NULL;
4870         current_switch_cond = NULL;
4871
4872         init_ir_types();
4873
4874         scope_to_firm(&unit->scope);
4875 }