nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/strutil.h"
  36 #include "adt/util.h"
  37 #include "symbol_t.h"
  38 #include "token_t.h"
  39 #include "type_t.h"
  40 #include "ast_t.h"
  41 #include "entity_t.h"
  42 #include "parser.h"
  43 #include "diagnostic.h"
  44 #include "lang_features.h"
  45 #include "types.h"
  46 #include "type_hash.h"
  47 #include "mangle.h"
  48 #include "walk.h"
  49 #include "warning.h"
  50 #include "printer.h"
  51 #include "entitymap_t.h"
  52 #include "driver/firm_opt.h"
  53
  54 typedef struct trampoline_region trampoline_region;
  55 struct trampoline_region {
  56         ir_entity        *function;    /**< The function that is called by this trampoline */
  57         ir_entity        *region;      /**< created region for the trampoline */
  58 };
  59
  60 fp_model_t firm_fp_model = fp_model_precise;
  61
  62 static const backend_params *be_params;
  63
  64 static ir_type *ir_type_char;
  65 static ir_type *ir_type_const_char;
  66 static ir_type *ir_type_wchar_t;
  67 static ir_type *ir_type_void;
  68 static ir_type *ir_type_int;
  69
  70 /* architecture specific floating point arithmetic mode (if any) */
  71 static ir_mode *mode_float_arithmetic;
  72
  73 /* alignment of stack parameters */
  74 static unsigned stack_param_align;
  75
  76 static int        next_value_number_function;
  77 static ir_node   *continue_label;
  78 static ir_node   *break_label;
  79 static ir_node   *current_switch_cond;
  80 static bool       saw_default_label;
  81 static label_t  **all_labels;
  82 static entity_t **inner_functions;
  83 static ir_node   *ijmp_list;
  84 static bool       constant_folding;
  85
  86 static const entity_t     *current_function_entity;
  87 static ir_node            *current_function_name;
  88 static ir_node            *current_funcsig;
  89 static switch_statement_t *current_switch;
  90 static ir_graph           *current_function;
  91 static translation_unit_t *current_translation_unit;
  92 static trampoline_region  *current_trampolines;
  93 static ir_type            *current_outer_frame;
  94 static ir_node            *current_static_link;
  95 static ir_entity          *current_vararg_entity;
  96
  97 static entitymap_t  entitymap;
  98
  99 static struct obstack asm_obst;
 100
 101 typedef enum declaration_kind_t {
 102         DECLARATION_KIND_UNKNOWN,
 103         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 104         DECLARATION_KIND_GLOBAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 107         DECLARATION_KIND_PARAMETER,
 108         DECLARATION_KIND_PARAMETER_ENTITY,
 109         DECLARATION_KIND_FUNCTION,
 110         DECLARATION_KIND_COMPOUND_MEMBER,
 111         DECLARATION_KIND_INNER_FUNCTION
 112 } declaration_kind_t;
 113
 114 static ir_mode *get_ir_mode_storage(type_t *type);
 115
 116 static ir_type *get_ir_type_incomplete(type_t *type);
 117
 118 static void enqueue_inner_function(entity_t *entity)
 119 {
 120         if (inner_functions == NULL)
 121                 inner_functions = NEW_ARR_F(entity_t *, 0);
 122         ARR_APP1(entity_t*, inner_functions, entity);
 123 }
 124
 125 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 126 {
 127         const entity_t *entity = get_irg_loc_description(irg, pos);
 128
 129         if (entity != NULL) {
 130                 source_position_t const *const pos = &entity->base.source_position;
 131                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 132         }
 133         return new_r_Unknown(irg, mode);
 134 }
 135
 136 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 137 {
 138         const source_position_t *pos = (const source_position_t*) dbg;
 139         if (pos == NULL)
 140                 return NULL;
 141         if (line != NULL)
 142                 *line = pos->lineno;
 143         return pos->input_name;
 144 }
 145
 146 static dbg_info *get_dbg_info(const source_position_t *pos)
 147 {
 148         return (dbg_info*) pos;
 149 }
 150
 151 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 152                                     const type_dbg_info *dbg)
 153 {
 154         assert(dbg != NULL);
 155         print_to_buffer(buffer, buffer_size);
 156         const type_t *type = (const type_t*) dbg;
 157         print_type(type);
 158         finish_print_to_buffer();
 159 }
 160
 161 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 162 {
 163         return (type_dbg_info*) type;
 164 }
 165
 166 /* is the current block a reachable one? */
 167 static bool currently_reachable(void)
 168 {
 169         ir_node *const block = get_cur_block();
 170         return block != NULL && !is_Bad(block);
 171 }
 172
 173 static void set_unreachable_now(void)
 174 {
 175         set_cur_block(NULL);
 176 }
 177
 178 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 179
 180 static ir_mode *mode_int, *mode_uint;
 181
 182 static ir_node *_expression_to_firm(const expression_t *expression);
 183 static ir_node *expression_to_firm(const expression_t *expression);
 184 static void create_local_declaration(entity_t *entity);
 185
 186 static unsigned decide_modulo_shift(unsigned type_size)
 187 {
 188         if (architecture_modulo_shift == 0)
 189                 return 0;
 190         if (type_size < architecture_modulo_shift)
 191                 return architecture_modulo_shift;
 192         return type_size;
 193 }
 194
 195 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 196 {
 197         unsigned flags = get_atomic_type_flags(kind);
 198         unsigned size  = get_atomic_type_size(kind);
 199         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 200                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 201                 char            name[64];
 202                 ir_mode_sort    sort;
 203                 unsigned        bit_size     = size * 8;
 204                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 205                 unsigned        modulo_shift = 0;
 206                 ir_mode_arithmetic arithmetic;
 207
 208                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 209                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 210                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 211                                  bit_size);
 212                         sort         = irms_int_number;
 213                         arithmetic   = irma_twos_complement;
 214                         modulo_shift = decide_modulo_shift(bit_size);
 215                 } else {
 216                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 217                         snprintf(name, sizeof(name), "F%u", bit_size);
 218                         sort         = irms_float_number;
 219                         arithmetic   = irma_ieee754;
 220                 }
 221                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 222                                    modulo_shift);
 223         }
 224
 225         return NULL;
 226 }
 227
 228 /**
 229  * Initialises the atomic modes depending on the machine size.
 230  */
 231 static void init_atomic_modes(void)
 232 {
 233         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 234                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 235         }
 236         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 237         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 238
 239         /* there's no real void type in firm */
 240         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 241 }
 242
 243 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 244 {
 245         assert(kind <= ATOMIC_TYPE_LAST);
 246         return atomic_modes[kind];
 247 }
 248
 249 static ir_node *get_vla_size(array_type_t *const type)
 250 {
 251         ir_node *size_node = type->size_node;
 252         if (size_node == NULL) {
 253                 size_node = expression_to_firm(type->size_expression);
 254                 type->size_node = size_node;
 255         }
 256         return size_node;
 257 }
 258
 259 /**
 260  * Return a node representing the size of a type.
 261  */
 262 static ir_node *get_type_size_node(type_t *type)
 263 {
 264         type = skip_typeref(type);
 265
 266         if (is_type_array(type) && type->array.is_vla) {
 267                 ir_node *size_node = get_vla_size(&type->array);
 268                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 269                 ir_mode *mode      = get_irn_mode(size_node);
 270                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 271                 return real_size;
 272         }
 273
 274         ir_mode *mode = get_ir_mode_storage(type_size_t);
 275         symconst_symbol sym;
 276         sym.type_p = get_ir_type(type);
 277         return new_SymConst(mode, sym, symconst_type_size);
 278 }
 279
 280 static unsigned count_parameters(const function_type_t *function_type)
 281 {
 282         unsigned count = 0;
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         for ( ; parameter != NULL; parameter = parameter->next) {
 286                 ++count;
 287         }
 288
 289         return count;
 290 }
 291
 292 /**
 293  * Creates a Firm type for an atomic type
 294  */
 295 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 296 {
 297         ir_mode        *mode      = atomic_modes[akind];
 298         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 299         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 300         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 301
 302         set_type_alignment_bytes(irtype, alignment);
 303
 304         return irtype;
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(const atomic_type_t *type)
 311 {
 312         atomic_type_kind_t  kind = type->akind;
 313         ir_mode            *mode = atomic_modes[kind];
 314         ident              *id   = get_mode_ident(mode);
 315
 316         (void) id;
 317
 318         /* FIXME: finish the array */
 319         return NULL;
 320 }
 321
 322 /**
 323  * Creates a Firm type for an imaginary type
 324  */
 325 static ir_type *create_imaginary_type(const atomic_type_t *type)
 326 {
 327         return create_atomic_type(type->akind, (const type_t*)type);
 328 }
 329
 330 /**
 331  * return type of a parameter (and take transparent union gnu extension into
 332  * account)
 333  */
 334 static type_t *get_parameter_type(type_t *orig_type)
 335 {
 336         type_t *type = skip_typeref(orig_type);
 337         if (is_type_union(type)
 338                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 339                 compound_t *compound = type->compound.compound;
 340                 type                 = compound->members.entities->declaration.type;
 341         }
 342
 343         return type;
 344 }
 345
 346 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 347 {
 348         type_t        *return_type  = skip_typeref(function_type->return_type);
 349
 350         int            n_parameters = count_parameters(function_type)
 351                                        + (for_closure ? 1 : 0);
 352         int            n_results    = return_type == type_void ? 0 : 1;
 353         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 354         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 355
 356         if (return_type != type_void) {
 357                 ir_type *restype = get_ir_type(return_type);
 358                 set_method_res_type(irtype, 0, restype);
 359         }
 360
 361         function_parameter_t *parameter = function_type->parameters;
 362         int                   n         = 0;
 363         if (for_closure) {
 364                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 365                 set_method_param_type(irtype, n, p_irtype);
 366                 ++n;
 367         }
 368         for ( ; parameter != NULL; parameter = parameter->next) {
 369                 type_t  *type     = get_parameter_type(parameter->type);
 370                 ir_type *p_irtype = get_ir_type(type);
 371                 set_method_param_type(irtype, n, p_irtype);
 372                 ++n;
 373         }
 374
 375         bool is_variadic = function_type->variadic;
 376
 377         if (is_variadic)
 378                 set_method_variadicity(irtype, variadicity_variadic);
 379
 380         unsigned cc = get_method_calling_convention(irtype);
 381         switch (function_type->calling_convention) {
 382         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 383         case CC_CDECL:
 384 is_cdecl:
 385                 set_method_calling_convention(irtype, SET_CDECL(cc));
 386                 break;
 387
 388         case CC_STDCALL:
 389                 if (is_variadic)
 390                         goto is_cdecl;
 391
 392                 /* only non-variadic function can use stdcall, else use cdecl */
 393                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 394                 break;
 395
 396         case CC_FASTCALL:
 397                 if (is_variadic)
 398                         goto is_cdecl;
 399                 /* only non-variadic function can use fastcall, else use cdecl */
 400                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 401                 break;
 402
 403         case CC_THISCALL:
 404                 /* Hmm, leave default, not accepted by the parser yet. */
 405                 break;
 406         }
 407
 408         if (for_closure)
 409                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 410
 411         const decl_modifiers_t modifiers = function_type->modifiers;
 412         if (modifiers & DM_CONST)
 413                 add_method_additional_properties(irtype, mtp_property_const);
 414         if (modifiers & DM_PURE)
 415                 add_method_additional_properties(irtype, mtp_property_pure);
 416         if (modifiers & DM_RETURNS_TWICE)
 417                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 418         if (modifiers & DM_NORETURN)
 419                 add_method_additional_properties(irtype, mtp_property_noreturn);
 420         if (modifiers & DM_NOTHROW)
 421                 add_method_additional_properties(irtype, mtp_property_nothrow);
 422         if (modifiers & DM_MALLOC)
 423                 add_method_additional_properties(irtype, mtp_property_malloc);
 424
 425         return irtype;
 426 }
 427
 428 static ir_type *create_pointer_type(pointer_type_t *type)
 429 {
 430         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 431         type_t        *points_to    = type->points_to;
 432         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 433         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 434
 435         return irtype;
 436 }
 437
 438 static ir_type *create_reference_type(reference_type_t *type)
 439 {
 440         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 441         type_t        *refers_to    = type->refers_to;
 442         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 443         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 444
 445         return irtype;
 446 }
 447
 448 static ir_type *create_array_type(array_type_t *type)
 449 {
 450         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 451         type_t        *element_type    = type->element_type;
 452         ir_type       *ir_element_type = get_ir_type(element_type);
 453         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 454
 455         const int align = get_type_alignment_bytes(ir_element_type);
 456         set_type_alignment_bytes(irtype, align);
 457
 458         if (type->size_constant) {
 459                 int n_elements = type->size;
 460
 461                 set_array_bounds_int(irtype, 0, 0, n_elements);
 462
 463                 size_t elemsize = get_type_size_bytes(ir_element_type);
 464                 if (elemsize % align > 0) {
 465                         elemsize += align - (elemsize % align);
 466                 }
 467                 set_type_size_bytes(irtype, n_elements * elemsize);
 468         } else {
 469                 set_array_lower_bound_int(irtype, 0, 0);
 470         }
 471         set_type_state(irtype, layout_fixed);
 472
 473         return irtype;
 474 }
 475
 476 /**
 477  * Return the signed integer type of size bits.
 478  *
 479  * @param size   the size
 480  */
 481 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 482                                                  unsigned size,
 483                                                                                                  const type_t *type)
 484 {
 485         static ir_mode *s_modes[64 + 1] = {NULL, };
 486         ir_type *res;
 487         ir_mode *mode;
 488
 489         if (size <= 0 || size > 64)
 490                 return NULL;
 491
 492         mode = s_modes[size];
 493         if (mode == NULL) {
 494                 char name[32];
 495
 496                 snprintf(name, sizeof(name), "bf_I%u", size);
 497                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 498                                    size <= 32 ? 32 : size );
 499                 s_modes[size] = mode;
 500         }
 501
 502         type_dbg_info *dbgi = get_type_dbg_info_(type);
 503         res                 = new_d_type_primitive(mode, dbgi);
 504         set_primitive_base_type(res, base_tp);
 505
 506         return res;
 507 }
 508
 509 /**
 510  * Return the unsigned integer type of size bits.
 511  *
 512  * @param size   the size
 513  */
 514 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 515                                                    unsigned size,
 516                                                                                                    const type_t *type)
 517 {
 518         static ir_mode *u_modes[64 + 1] = {NULL, };
 519         ir_type *res;
 520         ir_mode *mode;
 521
 522         if (size <= 0 || size > 64)
 523                 return NULL;
 524
 525         mode = u_modes[size];
 526         if (mode == NULL) {
 527                 char name[32];
 528
 529                 snprintf(name, sizeof(name), "bf_U%u", size);
 530                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 531                                    size <= 32 ? 32 : size );
 532                 u_modes[size] = mode;
 533         }
 534
 535         type_dbg_info *dbgi = get_type_dbg_info_(type);
 536         res = new_d_type_primitive(mode, dbgi);
 537         set_primitive_base_type(res, base_tp);
 538
 539         return res;
 540 }
 541
 542 static ir_type *create_bitfield_type(const entity_t *entity)
 543 {
 544         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 545         type_t *base = skip_typeref(entity->declaration.type);
 546         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 547         ir_type *irbase = get_ir_type(base);
 548
 549         unsigned bit_size = entity->compound_member.bit_size;
 550
 551         assert(!is_type_float(base));
 552         if (is_type_signed(base)) {
 553                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 554         } else {
 555                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 556         }
 557 }
 558
 559 #define INVALID_TYPE ((ir_type_ptr)-1)
 560
 561 enum {
 562         COMPOUND_IS_STRUCT = false,
 563         COMPOUND_IS_UNION  = true
 564 };
 565
 566 /**
 567  * Construct firm type from ast struct type.
 568  */
 569 static ir_type *create_compound_type(compound_type_t *type,
 570                                      bool incomplete, bool is_union)
 571 {
 572         compound_t *compound = type->compound;
 573
 574         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 575                 return compound->irtype;
 576         }
 577
 578         symbol_t *type_symbol = compound->base.symbol;
 579         ident    *id;
 580         if (type_symbol != NULL) {
 581                 id = new_id_from_str(type_symbol->string);
 582         } else {
 583                 if (is_union) {
 584                         id = id_unique("__anonymous_union.%u");
 585                 } else {
 586                         id = id_unique("__anonymous_struct.%u");
 587                 }
 588         }
 589
 590         ir_type *irtype;
 591         if (is_union) {
 592                 irtype = new_type_union(id);
 593         } else {
 594                 irtype = new_type_struct(id);
 595         }
 596
 597         compound->irtype_complete = false;
 598         compound->irtype          = irtype;
 599
 600         if (incomplete)
 601                 return irtype;
 602
 603         if (is_union) {
 604                 layout_union_type(type);
 605         } else {
 606                 layout_struct_type(type);
 607         }
 608
 609         compound->irtype_complete = true;
 610
 611         entity_t *entry = compound->members.entities;
 612         for ( ; entry != NULL; entry = entry->base.next) {
 613                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 614                         continue;
 615
 616                 symbol_t *symbol     = entry->base.symbol;
 617                 type_t   *entry_type = entry->declaration.type;
 618                 ident    *ident;
 619                 if (symbol == NULL) {
 620                         /* anonymous bitfield member, skip */
 621                         if (entry->compound_member.bitfield)
 622                                 continue;
 623                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 624                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 625                         ident = id_unique("anon.%u");
 626                 } else {
 627                         ident = new_id_from_str(symbol->string);
 628                 }
 629
 630                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 631
 632                 ir_type *entry_irtype;
 633                 if (entry->compound_member.bitfield) {
 634                         entry_irtype = create_bitfield_type(entry);
 635                 } else {
 636                         entry_irtype = get_ir_type(entry_type);
 637                 }
 638                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 639
 640                 set_entity_offset(entity, entry->compound_member.offset);
 641                 set_entity_offset_bits_remainder(entity,
 642                                                  entry->compound_member.bit_offset);
 643
 644                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 645                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 646                 entry->compound_member.entity = entity;
 647         }
 648
 649         set_type_alignment_bytes(irtype, compound->alignment);
 650         set_type_size_bytes(irtype, compound->size);
 651         set_type_state(irtype, layout_fixed);
 652
 653         return irtype;
 654 }
 655
 656 static ir_type *create_enum_type(enum_type_t *const type)
 657 {
 658         type->base.base.firm_type = ir_type_int;
 659
 660         ir_mode   *const mode    = mode_int;
 661         ir_tarval *const one     = get_mode_one(mode);
 662         ir_tarval *      tv_next = get_mode_null(mode);
 663
 664         bool constant_folding_old = constant_folding;
 665         constant_folding = true;
 666
 667         enum_t   *enume = type->enume;
 668         entity_t *entry = enume->base.next;
 669         for (; entry != NULL; entry = entry->base.next) {
 670                 if (entry->kind != ENTITY_ENUM_VALUE)
 671                         break;
 672
 673                 expression_t *const init = entry->enum_value.value;
 674                 if (init != NULL) {
 675                         ir_node *const cnst = expression_to_firm(init);
 676                         if (!is_Const(cnst)) {
 677                                 panic("couldn't fold constant");
 678                         }
 679                         tv_next = get_Const_tarval(cnst);
 680                 }
 681                 entry->enum_value.tv = tv_next;
 682                 tv_next = tarval_add(tv_next, one);
 683         }
 684
 685         constant_folding = constant_folding_old;
 686
 687         return create_atomic_type(type->base.akind, (const type_t*) type);
 688 }
 689
 690 static ir_type *get_ir_type_incomplete(type_t *type)
 691 {
 692         assert(type != NULL);
 693         type = skip_typeref(type);
 694
 695         if (type->base.firm_type != NULL) {
 696                 assert(type->base.firm_type != INVALID_TYPE);
 697                 return type->base.firm_type;
 698         }
 699
 700         switch (type->kind) {
 701         case TYPE_COMPOUND_STRUCT:
 702                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 703         case TYPE_COMPOUND_UNION:
 704                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 705         default:
 706                 return get_ir_type(type);
 707         }
 708 }
 709
 710 ir_type *get_ir_type(type_t *type)
 711 {
 712         assert(type != NULL);
 713
 714         type = skip_typeref(type);
 715
 716         if (type->base.firm_type != NULL) {
 717                 assert(type->base.firm_type != INVALID_TYPE);
 718                 return type->base.firm_type;
 719         }
 720
 721         ir_type *firm_type = NULL;
 722         switch (type->kind) {
 723         case TYPE_ERROR:
 724                 /* Happens while constant folding, when there was an error */
 725                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 726
 727         case TYPE_ATOMIC:
 728                 firm_type = create_atomic_type(type->atomic.akind, type);
 729                 break;
 730         case TYPE_COMPLEX:
 731                 firm_type = create_complex_type(&type->atomic);
 732                 break;
 733         case TYPE_IMAGINARY:
 734                 firm_type = create_imaginary_type(&type->atomic);
 735                 break;
 736         case TYPE_FUNCTION:
 737                 firm_type = create_method_type(&type->function, false);
 738                 break;
 739         case TYPE_POINTER:
 740                 firm_type = create_pointer_type(&type->pointer);
 741                 break;
 742         case TYPE_REFERENCE:
 743                 firm_type = create_reference_type(&type->reference);
 744                 break;
 745         case TYPE_ARRAY:
 746                 firm_type = create_array_type(&type->array);
 747                 break;
 748         case TYPE_COMPOUND_STRUCT:
 749                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 750                 break;
 751         case TYPE_COMPOUND_UNION:
 752                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 753                 break;
 754         case TYPE_ENUM:
 755                 firm_type = create_enum_type(&type->enumt);
 756                 break;
 757
 758         case TYPE_TYPEOF:
 759         case TYPE_TYPEDEF:
 760                 break;
 761         }
 762         if (firm_type == NULL)
 763                 panic("unknown type found");
 764
 765         type->base.firm_type = firm_type;
 766         return firm_type;
 767 }
 768
 769 static ir_mode *get_ir_mode_storage(type_t *type)
 770 {
 771         ir_type *irtype = get_ir_type(type);
 772
 773         /* firm doesn't report a mode for arrays somehow... */
 774         if (is_Array_type(irtype)) {
 775                 return mode_P_data;
 776         }
 777
 778         ir_mode *mode = get_type_mode(irtype);
 779         assert(mode != NULL);
 780         return mode;
 781 }
 782
 783 /*
 784  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 785  * int that it returns bigger modes for floating point on some platforms
 786  * (x87 internally does arithemtic with 80bits)
 787  */
 788 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 789 {
 790         ir_mode *mode = get_ir_mode_storage(type);
 791         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 792                 return mode_float_arithmetic;
 793         }
 794
 795         return mode;
 796 }
 797
 798 /** Names of the runtime functions. */
 799 static const struct {
 800         int        id;           /**< the rts id */
 801         int        n_res;        /**< number of return values */
 802         const char *name;        /**< the name of the rts function */
 803         int        n_params;     /**< number of parameters */
 804         unsigned   flags;        /**< language flags */
 805 } rts_data[] = {
 806         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 807         { rts_abort,      0, "abort",        0, _C89 },
 808         { rts_alloca,     1, "alloca",       1, _ALL },
 809         { rts_abs,        1, "abs",          1, _C89 },
 810         { rts_labs,       1, "labs",         1, _C89 },
 811         { rts_llabs,      1, "llabs",        1, _C99 },
 812         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 813
 814         { rts_fabs,       1, "fabs",         1, _C89 },
 815         { rts_sqrt,       1, "sqrt",         1, _C89 },
 816         { rts_cbrt,       1, "cbrt",         1, _C99 },
 817         { rts_exp,        1, "exp",          1, _C89 },
 818         { rts_exp2,       1, "exp2",         1, _C89 },
 819         { rts_exp10,      1, "exp10",        1, _GNUC },
 820         { rts_log,        1, "log",          1, _C89 },
 821         { rts_log2,       1, "log2",         1, _C89 },
 822         { rts_log10,      1, "log10",        1, _C89 },
 823         { rts_pow,        1, "pow",          2, _C89 },
 824         { rts_sin,        1, "sin",          1, _C89 },
 825         { rts_cos,        1, "cos",          1, _C89 },
 826         { rts_tan,        1, "tan",          1, _C89 },
 827         { rts_asin,       1, "asin",         1, _C89 },
 828         { rts_acos,       1, "acos",         1, _C89 },
 829         { rts_atan,       1, "atan",         1, _C89 },
 830         { rts_sinh,       1, "sinh",         1, _C89 },
 831         { rts_cosh,       1, "cosh",         1, _C89 },
 832         { rts_tanh,       1, "tanh",         1, _C89 },
 833
 834         { rts_fabsf,      1, "fabsf",        1, _C99 },
 835         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 836         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 837         { rts_expf,       1, "expf",         1, _C99 },
 838         { rts_exp2f,      1, "exp2f",        1, _C99 },
 839         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 840         { rts_logf,       1, "logf",         1, _C99 },
 841         { rts_log2f,      1, "log2f",        1, _C99 },
 842         { rts_log10f,     1, "log10f",       1, _C99 },
 843         { rts_powf,       1, "powf",         2, _C99 },
 844         { rts_sinf,       1, "sinf",         1, _C99 },
 845         { rts_cosf,       1, "cosf",         1, _C99 },
 846         { rts_tanf,       1, "tanf",         1, _C99 },
 847         { rts_asinf,      1, "asinf",        1, _C99 },
 848         { rts_acosf,      1, "acosf",        1, _C99 },
 849         { rts_atanf,      1, "atanf",        1, _C99 },
 850         { rts_sinhf,      1, "sinhf",        1, _C99 },
 851         { rts_coshf,      1, "coshf",        1, _C99 },
 852         { rts_tanhf,      1, "tanhf",        1, _C99 },
 853
 854         { rts_fabsl,      1, "fabsl",        1, _C99 },
 855         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 856         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 857         { rts_expl,       1, "expl",         1, _C99 },
 858         { rts_exp2l,      1, "exp2l",        1, _C99 },
 859         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 860         { rts_logl,       1, "logl",         1, _C99 },
 861         { rts_log2l,      1, "log2l",        1, _C99 },
 862         { rts_log10l,     1, "log10l",       1, _C99 },
 863         { rts_powl,       1, "powl",         2, _C99 },
 864         { rts_sinl,       1, "sinl",         1, _C99 },
 865         { rts_cosl,       1, "cosl",         1, _C99 },
 866         { rts_tanl,       1, "tanl",         1, _C99 },
 867         { rts_asinl,      1, "asinl",        1, _C99 },
 868         { rts_acosl,      1, "acosl",        1, _C99 },
 869         { rts_atanl,      1, "atanl",        1, _C99 },
 870         { rts_sinhl,      1, "sinhl",        1, _C99 },
 871         { rts_coshl,      1, "coshl",        1, _C99 },
 872         { rts_tanhl,      1, "tanhl",        1, _C99 },
 873
 874         { rts_strcmp,     1, "strcmp",       2, _C89 },
 875         { rts_strncmp,    1, "strncmp",      3, _C89 },
 876         { rts_strcpy,     1, "strcpy",       2, _C89 },
 877         { rts_strlen,     1, "strlen",       1, _C89 },
 878         { rts_memcpy,     1, "memcpy",       3, _C89 },
 879         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 880         { rts_memmove,    1, "memmove",      3, _C89 },
 881         { rts_memset,     1, "memset",       3, _C89 },
 882         { rts_memcmp,     1, "memcmp",       3, _C89 },
 883 };
 884
 885 static ident *rts_idents[lengthof(rts_data)];
 886
 887 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 888
 889 void set_create_ld_ident(ident *(*func)(entity_t*))
 890 {
 891         create_ld_ident = func;
 892 }
 893
 894 /**
 895  * Handle GNU attributes for entities
 896  *
 897  * @param ent   the entity
 898  * @param decl  the routine declaration
 899  */
 900 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 901 {
 902         assert(is_declaration(entity));
 903         decl_modifiers_t modifiers = entity->declaration.modifiers;
 904
 905         if (is_method_entity(irentity)) {
 906                 if (modifiers & DM_PURE) {
 907                         set_entity_additional_properties(irentity, mtp_property_pure);
 908                 }
 909                 if (modifiers & DM_CONST) {
 910                         add_entity_additional_properties(irentity, mtp_property_const);
 911                 }
 912         }
 913         if (modifiers & DM_USED) {
 914                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 915         }
 916         if (modifiers & DM_WEAK) {
 917                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 918         }
 919 }
 920
 921 static bool is_main(entity_t *entity)
 922 {
 923         static symbol_t *sym_main = NULL;
 924         if (sym_main == NULL) {
 925                 sym_main = symbol_table_insert("main");
 926         }
 927
 928         if (entity->base.symbol != sym_main)
 929                 return false;
 930         /* must be in outermost scope */
 931         if (entity->base.parent_scope != &current_translation_unit->scope)
 932                 return false;
 933
 934         return true;
 935 }
 936
 937 /**
 938  * Creates an entity representing a function.
 939  *
 940  * @param entity       the function declaration/definition
 941  * @param owner_type   the owner type of this function, NULL
 942  *                     for global functions
 943  */
 944 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 945 {
 946         assert(entity->kind == ENTITY_FUNCTION);
 947         if (entity->function.irentity != NULL)
 948                 return entity->function.irentity;
 949
 950         switch (entity->function.btk) {
 951         case BUILTIN_NONE:
 952         case BUILTIN_LIBC:
 953         case BUILTIN_LIBC_CHECK:
 954                 break;
 955         default:
 956                 return NULL;
 957         }
 958
 959         if (is_main(entity)) {
 960                 /* force main to C linkage */
 961                 type_t *type = entity->declaration.type;
 962                 assert(is_type_function(type));
 963                 if (type->function.linkage != LINKAGE_C) {
 964                         type_t *new_type           = duplicate_type(type);
 965                         new_type->function.linkage = LINKAGE_C;
 966                         type                       = identify_new_type(new_type);
 967                         entity->declaration.type   = type;
 968                 }
 969         }
 970
 971         symbol_t *symbol = entity->base.symbol;
 972         ident    *id     = new_id_from_str(symbol->string);
 973
 974         /* already an entity defined? */
 975         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 976         bool const has_body = entity->function.statement != NULL;
 977         if (irentity != NULL) {
 978                 if (get_entity_visibility(irentity) == ir_visibility_external
 979                                 && has_body) {
 980                         set_entity_visibility(irentity, ir_visibility_default);
 981                 }
 982                 goto entity_created;
 983         }
 984
 985         ir_type *ir_type_method;
 986         if (entity->function.need_closure)
 987                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 988         else
 989                 ir_type_method = get_ir_type(entity->declaration.type);
 990
 991         bool nested_function = false;
 992         if (owner_type == NULL)
 993                 owner_type = get_glob_type();
 994         else
 995                 nested_function = true;
 996
 997         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 998         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
 999
1000         ident *ld_id;
1001         if (nested_function)
1002                 ld_id = id_unique("inner.%u");
1003         else
1004                 ld_id = create_ld_ident(entity);
1005         set_entity_ld_ident(irentity, ld_id);
1006
1007         handle_decl_modifiers(irentity, entity);
1008
1009         if (! nested_function) {
1010                 /* static inline             => local
1011                  * extern inline             => local
1012                  * inline without definition => local
1013                  * inline with definition    => external_visible */
1014                 storage_class_tag_t const storage_class
1015                         = (storage_class_tag_t) entity->declaration.storage_class;
1016                 bool                const is_inline     = entity->function.is_inline;
1017
1018                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1019                     set_entity_visibility(irentity, ir_visibility_default);
1020                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1021                            (is_inline && has_body)) {
1022                     set_entity_visibility(irentity, ir_visibility_local);
1023                 } else if (has_body) {
1024                     set_entity_visibility(irentity, ir_visibility_default);
1025                 } else {
1026                     set_entity_visibility(irentity, ir_visibility_external);
1027                 }
1028         } else {
1029                 /* nested functions are always local */
1030                 set_entity_visibility(irentity, ir_visibility_local);
1031         }
1032
1033         /* We should check for file scope here, but as long as we compile C only
1034            this is not needed. */
1035         if (!freestanding && !has_body) {
1036                 /* check for a known runtime function */
1037                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1038                         if (id != rts_idents[i])
1039                                 continue;
1040
1041                         function_type_t *function_type
1042                                 = &entity->declaration.type->function;
1043                         /* rts_entities code can't handle a "wrong" number of parameters */
1044                         if (function_type->unspecified_parameters)
1045                                 continue;
1046
1047                         /* check number of parameters */
1048                         int n_params = count_parameters(function_type);
1049                         if (n_params != rts_data[i].n_params)
1050                                 continue;
1051
1052                         type_t *return_type = skip_typeref(function_type->return_type);
1053                         int     n_res       = return_type != type_void ? 1 : 0;
1054                         if (n_res != rts_data[i].n_res)
1055                                 continue;
1056
1057                         /* ignore those rts functions not necessary needed for current mode */
1058                         if ((c_mode & rts_data[i].flags) == 0)
1059                                 continue;
1060                         assert(rts_entities[rts_data[i].id] == NULL);
1061                         rts_entities[rts_data[i].id] = irentity;
1062                 }
1063         }
1064
1065         entitymap_insert(&entitymap, symbol, irentity);
1066
1067 entity_created:
1068         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1069         entity->function.irentity = irentity;
1070
1071         return irentity;
1072 }
1073
1074 /**
1075  * Creates a SymConst for a given entity.
1076  *
1077  * @param dbgi    debug info
1078  * @param entity  the entity
1079  */
1080 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1081 {
1082         assert(entity != NULL);
1083         union symconst_symbol sym;
1084         sym.entity_p = entity;
1085         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1086 }
1087
1088 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1089 {
1090         ir_mode *value_mode = get_irn_mode(value);
1091
1092         if (value_mode == dest_mode)
1093                 return value;
1094
1095         if (dest_mode == mode_b) {
1096                 ir_node *zero = new_Const(get_mode_null(value_mode));
1097                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_less_greater);
1098                 return cmp;
1099         }
1100
1101         return new_d_Conv(dbgi, value, dest_mode);
1102 }
1103
1104 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1105 {
1106         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1107 }
1108
1109 /**
1110  * Creates a SymConst node representing a wide string literal.
1111  *
1112  * @param literal   the wide string literal
1113  */
1114 static ir_node *wide_string_literal_to_firm(
1115                 const string_literal_expression_t *literal)
1116 {
1117         ir_type  *const global_type = get_glob_type();
1118         ir_type  *const elem_type   = ir_type_wchar_t;
1119         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1120         ir_type  *const type        = new_type_array(1, elem_type);
1121
1122         ident     *const id     = id_unique("str.%u");
1123         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1124         set_entity_ld_ident(entity, id);
1125         set_entity_visibility(entity, ir_visibility_private);
1126         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1127
1128         ir_mode      *const mode = get_type_mode(elem_type);
1129         const size_t        slen = wstrlen(&literal->value);
1130
1131         set_array_lower_bound_int(type, 0, 0);
1132         set_array_upper_bound_int(type, 0, slen);
1133         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1134         set_type_state(type, layout_fixed);
1135
1136         ir_initializer_t *initializer = create_initializer_compound(slen);
1137         const char              *p    = literal->value.begin;
1138         for (size_t i = 0; i < slen; ++i) {
1139                 assert(p < literal->value.begin + literal->value.size);
1140                 utf32             v   = read_utf8_char(&p);
1141                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1142                 ir_initializer_t *val = create_initializer_tarval(tv);
1143                 set_initializer_compound_value(initializer, i, val);
1144         }
1145         set_entity_initializer(entity, initializer);
1146
1147         return create_symconst(dbgi, entity);
1148 }
1149
1150 /**
1151  * Creates a SymConst node representing a string constant.
1152  *
1153  * @param src_pos    the source position of the string constant
1154  * @param id_prefix  a prefix for the name of the generated string constant
1155  * @param value      the value of the string constant
1156  */
1157 static ir_node *string_to_firm(const source_position_t *const src_pos,
1158                                const char *const id_prefix,
1159                                const string_t *const value)
1160 {
1161         ir_type  *const global_type = get_glob_type();
1162         dbg_info *const dbgi        = get_dbg_info(src_pos);
1163         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1164
1165         ident     *const id     = id_unique(id_prefix);
1166         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1167         set_entity_ld_ident(entity, id);
1168         set_entity_visibility(entity, ir_visibility_private);
1169         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1170
1171         ir_type *const elem_type = ir_type_const_char;
1172         ir_mode *const mode      = get_type_mode(elem_type);
1173
1174         const char* const string = value->begin;
1175         const size_t      slen   = value->size;
1176
1177         set_array_lower_bound_int(type, 0, 0);
1178         set_array_upper_bound_int(type, 0, slen);
1179         set_type_size_bytes(type, slen);
1180         set_type_state(type, layout_fixed);
1181
1182         ir_initializer_t *initializer = create_initializer_compound(slen);
1183         for (size_t i = 0; i < slen; ++i) {
1184                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1185                 ir_initializer_t *val = create_initializer_tarval(tv);
1186                 set_initializer_compound_value(initializer, i, val);
1187         }
1188         set_entity_initializer(entity, initializer);
1189
1190         return create_symconst(dbgi, entity);
1191 }
1192
1193 static bool try_create_integer(literal_expression_t *literal,
1194                                type_t *type, unsigned char base)
1195 {
1196         const char *string = literal->value.begin;
1197         size_t      size   = literal->value.size;
1198
1199         assert(type->kind == TYPE_ATOMIC);
1200         atomic_type_kind_t akind = type->atomic.akind;
1201
1202         ir_mode   *mode = atomic_modes[akind];
1203         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1204         if (tv == tarval_bad)
1205                 return false;
1206
1207         literal->base.type    = type;
1208         literal->target_value = tv;
1209         return true;
1210 }
1211
1212 static void create_integer_tarval(literal_expression_t *literal)
1213 {
1214         unsigned        us     = 0;
1215         unsigned        ls     = 0;
1216         const string_t *suffix = &literal->suffix;
1217         /* parse suffix */
1218         if (suffix->size > 0) {
1219                 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1220                         if (*c == 'u' || *c == 'U') { ++us; }
1221                         if (*c == 'l' || *c == 'L') { ++ls; }
1222                 }
1223         }
1224
1225         unsigned base;
1226         switch (literal->base.kind) {
1227                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1228                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1229                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1230                 default: panic("invalid literal kind");
1231         }
1232
1233         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1234
1235         /* now try if the constant is small enough for some types */
1236         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1237         if (ls < 1) {
1238                 if (us == 0 && try_create_integer(literal, type_int, base))
1239                         goto finished;
1240                 if ((us == 1 || base != 10)
1241                                 && try_create_integer(literal, type_unsigned_int, base))
1242                         goto finished;
1243         }
1244         if (ls < 2) {
1245                 if (us == 0 && try_create_integer(literal, type_long, base))
1246                         goto finished;
1247                 if ((us == 1 || base != 10)
1248                                 && try_create_integer(literal, type_unsigned_long, base))
1249                         goto finished;
1250         }
1251         /* last try? then we should not report tarval_bad */
1252         if (us != 1 && base == 10)
1253                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1254         if (us == 0 && try_create_integer(literal, type_long_long, base))
1255                 goto finished;
1256
1257         /* last try */
1258         assert(us == 1 || base != 10);
1259         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1260         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1261         if (!res)
1262                 panic("internal error when parsing number literal");
1263
1264 finished:
1265         tarval_set_integer_overflow_mode(old_mode);
1266 }
1267
1268 void determine_literal_type(literal_expression_t *literal)
1269 {
1270         switch (literal->base.kind) {
1271         case EXPR_LITERAL_INTEGER:
1272         case EXPR_LITERAL_INTEGER_OCTAL:
1273         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1274                 create_integer_tarval(literal);
1275                 return;
1276         default:
1277                 break;
1278         }
1279 }
1280
1281 /**
1282  * Creates a Const node representing a constant.
1283  */
1284 static ir_node *literal_to_firm(const literal_expression_t *literal)
1285 {
1286         type_t     *type   = skip_typeref(literal->base.type);
1287         ir_mode    *mode   = get_ir_mode_storage(type);
1288         const char *string = literal->value.begin;
1289         size_t      size   = literal->value.size;
1290         ir_tarval  *tv;
1291
1292         switch (literal->base.kind) {
1293         case EXPR_LITERAL_WIDE_CHARACTER: {
1294                 utf32  v = read_utf8_char(&string);
1295                 char   buf[128];
1296                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1297
1298                 tv = new_tarval_from_str(buf, len, mode);
1299                 goto make_const;
1300         }
1301         case EXPR_LITERAL_CHARACTER: {
1302                 long long int v;
1303                 bool char_is_signed
1304                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1305                 if (size == 1 && char_is_signed) {
1306                         v = (signed char)string[0];
1307                 } else {
1308                         v = 0;
1309                         for (size_t i = 0; i < size; ++i) {
1310                                 v = (v << 8) | ((unsigned char)string[i]);
1311                         }
1312                 }
1313                 char   buf[128];
1314                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1315
1316                 tv = new_tarval_from_str(buf, len, mode);
1317                 goto make_const;
1318         }
1319         case EXPR_LITERAL_INTEGER:
1320         case EXPR_LITERAL_INTEGER_OCTAL:
1321         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1322                 assert(literal->target_value != NULL);
1323                 tv = literal->target_value;
1324                 goto make_const;
1325         case EXPR_LITERAL_FLOATINGPOINT:
1326                 tv = new_tarval_from_str(string, size, mode);
1327                 goto make_const;
1328         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1329                 char buffer[size + 2];
1330                 memcpy(buffer, "0x", 2);
1331                 memcpy(buffer+2, string, size);
1332                 tv = new_tarval_from_str(buffer, size+2, mode);
1333                 goto make_const;
1334         }
1335         case EXPR_LITERAL_BOOLEAN:
1336                 if (string[0] == 't') {
1337                         tv = get_mode_one(mode);
1338                 } else {
1339                         assert(string[0] == 'f');
1340                         tv = get_mode_null(mode);
1341                 }
1342                 goto make_const;
1343         case EXPR_LITERAL_MS_NOOP:
1344                 tv = get_mode_null(mode);
1345                 goto make_const;
1346         default:
1347                 break;
1348         }
1349         panic("Invalid literal kind found");
1350
1351 make_const: ;
1352         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1353         ir_node  *res        = new_d_Const(dbgi, tv);
1354         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1355         return create_conv(dbgi, res, mode_arith);
1356 }
1357
1358 /*
1359  * Allocate an area of size bytes aligned at alignment
1360  * at a frame type.
1361  */
1362 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1363 {
1364         static unsigned area_cnt = 0;
1365         char buf[32];
1366
1367         ir_type *tp = new_type_array(1, ir_type_char);
1368         set_array_bounds_int(tp, 0, 0, size);
1369         set_type_alignment_bytes(tp, alignment);
1370
1371         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1372         ident *name = new_id_from_str(buf);
1373         ir_entity *area = new_entity(frame_type, name, tp);
1374
1375         /* mark this entity as compiler generated */
1376         set_entity_compiler_generated(area, 1);
1377         return area;
1378 }
1379
1380 /**
1381  * Return a node representing a trampoline region
1382  * for a given function entity.
1383  *
1384  * @param dbgi    debug info
1385  * @param entity  the function entity
1386  */
1387 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1388 {
1389         ir_entity *region = NULL;
1390         int        i;
1391
1392         if (current_trampolines != NULL) {
1393                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1394                         if (current_trampolines[i].function == entity) {
1395                                 region = current_trampolines[i].region;
1396                                 break;
1397                         }
1398                 }
1399         } else {
1400                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1401         }
1402         ir_graph *irg = current_ir_graph;
1403         if (region == NULL) {
1404                 /* create a new region */
1405                 ir_type           *frame_tp = get_irg_frame_type(irg);
1406                 trampoline_region  reg;
1407                 reg.function = entity;
1408
1409                 reg.region   = alloc_trampoline(frame_tp,
1410                                                 be_params->trampoline_size,
1411                                                 be_params->trampoline_align);
1412                 ARR_APP1(trampoline_region, current_trampolines, reg);
1413                 region = reg.region;
1414         }
1415         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1416                                region);
1417 }
1418
1419 /**
1420  * Creates a trampoline for a function represented by an entity.
1421  *
1422  * @param dbgi    debug info
1423  * @param mode    the (reference) mode for the function address
1424  * @param entity  the function entity
1425  */
1426 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1427                                   ir_entity *entity)
1428 {
1429         assert(entity != NULL);
1430         ir_node *in[3];
1431         in[0] = get_trampoline_region(dbgi, entity);
1432         in[1] = create_symconst(dbgi, entity);
1433         in[2] = get_irg_frame(current_ir_graph);
1434
1435         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1436         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1437         return new_Proj(irn, mode, pn_Builtin_1_result);
1438 }
1439
1440 /**
1441  * Dereference an address.
1442  *
1443  * @param dbgi  debug info
1444  * @param type  the type of the dereferenced result (the points_to type)
1445  * @param addr  the address to dereference
1446  */
1447 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1448                                       ir_node *const addr)
1449 {
1450         ir_type *irtype = get_ir_type(type);
1451         if (is_compound_type(irtype)
1452                         || is_Method_type(irtype)
1453                         || is_Array_type(irtype)) {
1454                 return addr;
1455         }
1456
1457         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1458                                   ? cons_volatile : cons_none;
1459         ir_mode *const mode     = get_type_mode(irtype);
1460         ir_node *const memory   = get_store();
1461         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1462         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1463         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1464
1465         set_store(load_mem);
1466
1467         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1468         return create_conv(dbgi, load_res, mode_arithmetic);
1469 }
1470
1471 /**
1472  * Creates a strict Conv (to the node's mode) if necessary.
1473  *
1474  * @param dbgi  debug info
1475  * @param node  the node to strict conv
1476  */
1477 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1478 {
1479         ir_mode *mode = get_irn_mode(node);
1480
1481         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1482                 return node;
1483         if (!mode_is_float(mode))
1484                 return node;
1485
1486         /* check if there is already a Conv */
1487         if (is_Conv(node)) {
1488                 /* convert it into a strict Conv */
1489                 set_Conv_strict(node, 1);
1490                 return node;
1491         }
1492
1493         /* otherwise create a new one */
1494         return new_d_strictConv(dbgi, node, mode);
1495 }
1496
1497 /**
1498  * Returns the correct base address depending on whether it is a parameter or a
1499  * normal local variable.
1500  */
1501 static ir_node *get_local_frame(ir_entity *const ent)
1502 {
1503         ir_graph      *const irg   = current_ir_graph;
1504         const ir_type *const owner = get_entity_owner(ent);
1505         if (owner == current_outer_frame) {
1506                 assert(current_static_link != NULL);
1507                 return current_static_link;
1508         } else {
1509                 return get_irg_frame(irg);
1510         }
1511 }
1512
1513 /**
1514  * Keep all memory edges of the given block.
1515  */
1516 static void keep_all_memory(ir_node *block)
1517 {
1518         ir_node *old = get_cur_block();
1519
1520         set_cur_block(block);
1521         keep_alive(get_store());
1522         /* TODO: keep all memory edges from restricted pointers */
1523         set_cur_block(old);
1524 }
1525
1526 static ir_node *reference_expression_enum_value_to_firm(
1527                 const reference_expression_t *ref)
1528 {
1529         entity_t *entity = ref->entity;
1530         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1531         /* make sure the type is constructed */
1532         (void) get_ir_type(type);
1533
1534         return new_Const(entity->enum_value.tv);
1535 }
1536
1537 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1538 {
1539         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1540         entity_t *entity = ref->entity;
1541         assert(is_declaration(entity));
1542         type_t   *type   = skip_typeref(entity->declaration.type);
1543
1544         /* make sure the type is constructed */
1545         (void) get_ir_type(type);
1546
1547         if (entity->kind == ENTITY_FUNCTION
1548             && entity->function.btk != BUILTIN_NONE) {
1549                 ir_entity *irentity = get_function_entity(entity, NULL);
1550                 /* for gcc compatibility we have to produce (dummy) addresses for some
1551                  * builtins which don't have entities */
1552                 if (irentity == NULL) {
1553                         source_position_t const *const pos = &ref->base.source_position;
1554                         symbol_t          const *const sym = ref->entity->base.symbol;
1555                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1556
1557                         /* simply create a NULL pointer */
1558                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1559                         ir_node  *res  = new_Const(get_mode_null(mode));
1560
1561                         return res;
1562                 }
1563         }
1564
1565         switch ((declaration_kind_t) entity->declaration.kind) {
1566         case DECLARATION_KIND_UNKNOWN:
1567                 break;
1568
1569         case DECLARATION_KIND_LOCAL_VARIABLE: {
1570                 ir_mode *const mode  = get_ir_mode_storage(type);
1571                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1572                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1573         }
1574         case DECLARATION_KIND_PARAMETER: {
1575                 ir_mode *const mode  = get_ir_mode_storage(type);
1576                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1577                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1578         }
1579         case DECLARATION_KIND_FUNCTION: {
1580                 return create_symconst(dbgi, entity->function.irentity);
1581         }
1582         case DECLARATION_KIND_INNER_FUNCTION: {
1583                 ir_mode *const mode = get_ir_mode_storage(type);
1584                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1585                         /* inner function not using the closure */
1586                         return create_symconst(dbgi, entity->function.irentity);
1587                 } else {
1588                         /* need trampoline here */
1589                         return create_trampoline(dbgi, mode, entity->function.irentity);
1590                 }
1591         }
1592         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1593                 const variable_t *variable = &entity->variable;
1594                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1595                 return deref_address(dbgi, variable->base.type, addr);
1596         }
1597
1598         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1599                 ir_entity *irentity = entity->variable.v.entity;
1600                 ir_node   *frame    = get_local_frame(irentity);
1601                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1602                 return deref_address(dbgi, entity->declaration.type, sel);
1603         }
1604         case DECLARATION_KIND_PARAMETER_ENTITY: {
1605                 ir_entity *irentity = entity->parameter.v.entity;
1606                 ir_node   *frame    = get_local_frame(irentity);
1607                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1608                 return deref_address(dbgi, entity->declaration.type, sel);
1609         }
1610
1611         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1612                 return entity->variable.v.vla_base;
1613
1614         case DECLARATION_KIND_COMPOUND_MEMBER:
1615                 panic("not implemented reference type");
1616         }
1617
1618         panic("reference to declaration with unknown type found");
1619 }
1620
1621 static ir_node *reference_addr(const reference_expression_t *ref)
1622 {
1623         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1624         entity_t *entity = ref->entity;
1625         assert(is_declaration(entity));
1626
1627         switch((declaration_kind_t) entity->declaration.kind) {
1628         case DECLARATION_KIND_UNKNOWN:
1629                 break;
1630         case DECLARATION_KIND_PARAMETER:
1631         case DECLARATION_KIND_LOCAL_VARIABLE:
1632                 /* you can store to a local variable (so we don't panic but return NULL
1633                  * as an indicator for no real address) */
1634                 return NULL;
1635         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1636                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1637                 return addr;
1638         }
1639         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1640                 ir_entity *irentity = entity->variable.v.entity;
1641                 ir_node   *frame    = get_local_frame(irentity);
1642                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1643
1644                 return sel;
1645         }
1646         case DECLARATION_KIND_PARAMETER_ENTITY: {
1647                 ir_entity *irentity = entity->parameter.v.entity;
1648                 ir_node   *frame    = get_local_frame(irentity);
1649                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1650
1651                 return sel;
1652         }
1653
1654         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1655                 return entity->variable.v.vla_base;
1656
1657         case DECLARATION_KIND_FUNCTION: {
1658                 return create_symconst(dbgi, entity->function.irentity);
1659         }
1660
1661         case DECLARATION_KIND_INNER_FUNCTION: {
1662                 type_t  *const type = skip_typeref(entity->declaration.type);
1663                 ir_mode *const mode = get_ir_mode_storage(type);
1664                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1665                         /* inner function not using the closure */
1666                         return create_symconst(dbgi, entity->function.irentity);
1667                 } else {
1668                         /* need trampoline here */
1669                         return create_trampoline(dbgi, mode, entity->function.irentity);
1670                 }
1671         }
1672
1673         case DECLARATION_KIND_COMPOUND_MEMBER:
1674                 panic("not implemented reference type");
1675         }
1676
1677         panic("reference to declaration with unknown type found");
1678 }
1679
1680 /**
1681  * Transform calls to builtin functions.
1682  */
1683 static ir_node *process_builtin_call(const call_expression_t *call)
1684 {
1685         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1686
1687         assert(call->function->kind == EXPR_REFERENCE);
1688         reference_expression_t *builtin = &call->function->reference;
1689
1690         type_t *expr_type = skip_typeref(builtin->base.type);
1691         assert(is_type_pointer(expr_type));
1692
1693         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1694
1695         switch (builtin->entity->function.btk) {
1696         case BUILTIN_NONE:
1697                 break;
1698         case BUILTIN_ALLOCA: {
1699                 expression_t *argument = call->arguments->expression;
1700                 ir_node      *size     = expression_to_firm(argument);
1701
1702                 ir_node *store  = get_store();
1703                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1704                                               stack_alloc);
1705                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1706                 set_store(proj_m);
1707                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1708
1709                 return res;
1710         }
1711         case BUILTIN_INF: {
1712                 type_t    *type = function_type->function.return_type;
1713                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1714                 ir_tarval *tv   = get_mode_infinite(mode);
1715                 ir_node   *res  = new_d_Const(dbgi, tv);
1716                 return res;
1717         }
1718         case BUILTIN_NAN: {
1719                 /* Ignore string for now... */
1720                 assert(is_type_function(function_type));
1721                 type_t    *type = function_type->function.return_type;
1722                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1723                 ir_tarval *tv   = get_mode_NAN(mode);
1724                 ir_node   *res  = new_d_Const(dbgi, tv);
1725                 return res;
1726         }
1727         case BUILTIN_EXPECT: {
1728                 expression_t *argument = call->arguments->expression;
1729                 return _expression_to_firm(argument);
1730         }
1731         case BUILTIN_VA_END:
1732                 /* evaluate the argument of va_end for its side effects */
1733                 _expression_to_firm(call->arguments->expression);
1734                 return NULL;
1735         case BUILTIN_OBJECT_SIZE: {
1736                 /* determine value of "type" */
1737                 expression_t *type_expression = call->arguments->next->expression;
1738                 long          type_val        = fold_constant_to_int(type_expression);
1739                 type_t       *type            = function_type->function.return_type;
1740                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1741                 /* just produce a "I don't know" result */
1742                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1743                                                 get_mode_minus_one(mode);
1744
1745                 return new_d_Const(dbgi, result);
1746         }
1747         case BUILTIN_ROTL: {
1748                 ir_node *val  = expression_to_firm(call->arguments->expression);
1749                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1750                 ir_mode *mode = get_irn_mode(val);
1751                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1752         }
1753         case BUILTIN_ROTR: {
1754                 ir_node *val  = expression_to_firm(call->arguments->expression);
1755                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1756                 ir_mode *mode = get_irn_mode(val);
1757                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1758                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1759                 return new_d_Rotl(dbgi, val, sub, mode);
1760         }
1761         case BUILTIN_FIRM:
1762                 break;
1763         case BUILTIN_LIBC:
1764         case BUILTIN_LIBC_CHECK:
1765                 panic("builtin did not produce an entity");
1766         }
1767         panic("invalid builtin found");
1768 }
1769
1770 /**
1771  * Transform a call expression.
1772  * Handles some special cases, like alloca() calls, which must be resolved
1773  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1774  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1775  * handled right...
1776  */
1777 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1778 {
1779         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1780         assert(currently_reachable());
1781
1782         expression_t   *function = call->function;
1783         ir_node        *callee   = NULL;
1784         bool            firm_builtin = false;
1785         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1786         if (function->kind == EXPR_REFERENCE) {
1787                 const reference_expression_t *ref    = &function->reference;
1788                 entity_t                     *entity = ref->entity;
1789
1790                 if (entity->kind == ENTITY_FUNCTION) {
1791                         builtin_kind_t builtin = entity->function.btk;
1792                         if (builtin == BUILTIN_FIRM) {
1793                                 firm_builtin = true;
1794                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1795                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1796                                    && builtin != BUILTIN_LIBC_CHECK) {
1797                                 return process_builtin_call(call);
1798                         }
1799                 }
1800         }
1801         if (!firm_builtin)
1802                 callee = expression_to_firm(function);
1803
1804         type_t *type = skip_typeref(function->base.type);
1805         assert(is_type_pointer(type));
1806         pointer_type_t *pointer_type = &type->pointer;
1807         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1808         assert(is_type_function(points_to));
1809         function_type_t *function_type = &points_to->function;
1810
1811         int      n_parameters    = 0;
1812         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1813         ir_type *new_method_type = NULL;
1814         if (function_type->variadic || function_type->unspecified_parameters) {
1815                 const call_argument_t *argument = call->arguments;
1816                 for ( ; argument != NULL; argument = argument->next) {
1817                         ++n_parameters;
1818                 }
1819
1820                 /* we need to construct a new method type matching the call
1821                  * arguments... */
1822                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1823                 int n_res       = get_method_n_ress(ir_method_type);
1824                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1825                 set_method_calling_convention(new_method_type,
1826                                get_method_calling_convention(ir_method_type));
1827                 set_method_additional_properties(new_method_type,
1828                                get_method_additional_properties(ir_method_type));
1829                 set_method_variadicity(new_method_type,
1830                                        get_method_variadicity(ir_method_type));
1831
1832                 for (int i = 0; i < n_res; ++i) {
1833                         set_method_res_type(new_method_type, i,
1834                                             get_method_res_type(ir_method_type, i));
1835                 }
1836                 argument = call->arguments;
1837                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1838                         expression_t *expression = argument->expression;
1839                         ir_type      *irtype     = get_ir_type(expression->base.type);
1840                         set_method_param_type(new_method_type, i, irtype);
1841                 }
1842                 ir_method_type = new_method_type;
1843         } else {
1844                 n_parameters = get_method_n_params(ir_method_type);
1845         }
1846
1847         ir_node *in[n_parameters];
1848
1849         const call_argument_t *argument = call->arguments;
1850         for (int n = 0; n < n_parameters; ++n) {
1851                 expression_t *expression = argument->expression;
1852                 ir_node      *arg_node   = expression_to_firm(expression);
1853
1854                 type_t *arg_type = skip_typeref(expression->base.type);
1855                 if (!is_type_compound(arg_type)) {
1856                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1857                         arg_node      = create_conv(dbgi, arg_node, mode);
1858                         arg_node      = do_strict_conv(dbgi, arg_node);
1859                 }
1860
1861                 in[n] = arg_node;
1862
1863                 argument = argument->next;
1864         }
1865
1866         ir_node *store;
1867         if (function_type->modifiers & DM_CONST) {
1868                 store = get_irg_no_mem(current_ir_graph);
1869         } else {
1870                 store = get_store();
1871         }
1872
1873         ir_node *node;
1874         type_t  *return_type = skip_typeref(function_type->return_type);
1875         ir_node *result      = NULL;
1876         if (firm_builtin) {
1877                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1878                                      ir_method_type);
1879                 if (! (function_type->modifiers & DM_CONST)) {
1880                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1881                         set_store(mem);
1882                 }
1883
1884                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1885                         assert(is_type_scalar(return_type));
1886                         ir_mode *mode = get_ir_mode_storage(return_type);
1887                         result = new_Proj(node, mode, pn_Builtin_1_result);
1888                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1889                         result              = create_conv(NULL, result, mode_arith);
1890                 }
1891         } else {
1892                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1893                 if (! (function_type->modifiers & DM_CONST)) {
1894                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1895                         set_store(mem);
1896                 }
1897
1898                 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1899                         ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1900
1901                         if (is_type_scalar(return_type)) {
1902                                 ir_mode *mode       = get_ir_mode_storage(return_type);
1903                                 result              = new_Proj(resproj, mode, 0);
1904                                 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1905                                 result              = create_conv(NULL, result, mode_arith);
1906                         } else {
1907                                 ir_mode *mode = mode_P_data;
1908                                 result        = new_Proj(resproj, mode, 0);
1909                         }
1910                 }
1911         }
1912
1913         if (function_type->modifiers & DM_NORETURN) {
1914                 /* A dead end:  Keep the Call and the Block.  Also place all further
1915                  * nodes into a new and unreachable block. */
1916                 keep_alive(node);
1917                 keep_alive(get_cur_block());
1918                 ir_node *block = new_Block(0, NULL);
1919                 set_cur_block(block);
1920         }
1921
1922         return result;
1923 }
1924
1925 static void statement_to_firm(statement_t *statement);
1926 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1927
1928 static ir_node *expression_to_addr(const expression_t *expression);
1929 static ir_node *create_condition_evaluation(const expression_t *expression,
1930                                             ir_node *true_block,
1931                                             ir_node *false_block);
1932
1933 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1934                          ir_node *value)
1935 {
1936         if (!is_type_compound(type)) {
1937                 ir_mode *mode = get_ir_mode_storage(type);
1938                 value         = create_conv(dbgi, value, mode);
1939                 value         = do_strict_conv(dbgi, value);
1940         }
1941
1942         ir_node *memory = get_store();
1943
1944         if (is_type_scalar(type)) {
1945                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1946                                       ? cons_volatile : cons_none;
1947                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1948                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1949                 set_store(store_mem);
1950         } else {
1951                 ir_type *irtype    = get_ir_type(type);
1952                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1953                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1954                 set_store(copyb_mem);
1955         }
1956 }
1957
1958 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1959 {
1960         ir_tarval *all_one   = get_mode_all_one(mode);
1961         int        mode_size = get_mode_size_bits(mode);
1962
1963         assert(offset >= 0);
1964         assert(size   >= 0);
1965         assert(offset + size <= mode_size);
1966         if (size == mode_size) {
1967                 return all_one;
1968         }
1969
1970         long       shiftr    = get_mode_size_bits(mode) - size;
1971         long       shiftl    = offset;
1972         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1973         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1974         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1975         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1976
1977         return mask1;
1978 }
1979
1980 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1981                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1982 {
1983         ir_type *entity_type = get_entity_type(entity);
1984         ir_type *base_type   = get_primitive_base_type(entity_type);
1985         assert(base_type != NULL);
1986         ir_mode *mode        = get_type_mode(base_type);
1987
1988         value = create_conv(dbgi, value, mode);
1989
1990         /* kill upper bits of value and shift to right position */
1991         int        bitoffset       = get_entity_offset_bits_remainder(entity);
1992         int        bitsize         = get_mode_size_bits(get_type_mode(entity_type));
1993         ir_tarval *mask            = create_bitfield_mask(mode, 0, bitsize);
1994         ir_node   *mask_node       = new_d_Const(dbgi, mask);
1995         ir_node   *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1996         ir_tarval *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1997         ir_node   *shiftcount      = new_d_Const(dbgi, shiftl);
1998         ir_node   *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1999
2000         /* load current value */
2001         ir_node   *mem             = get_store();
2002         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2003                                           set_volatile ? cons_volatile : cons_none);
2004         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2005         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2006         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2007         ir_tarval *inv_mask        = tarval_not(shift_mask);
2008         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2009         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2010
2011         /* construct new value and store */
2012         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2013         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2014                                          set_volatile ? cons_volatile : cons_none);
2015         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2016         set_store(store_mem);
2017
2018         return value_masked;
2019 }
2020
2021 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2022                                          ir_node *addr)
2023 {
2024         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2025         entity_t *entity    = expression->compound_entry;
2026         type_t   *base_type = entity->declaration.type;
2027         ir_mode  *mode      = get_ir_mode_storage(base_type);
2028         ir_node  *mem       = get_store();
2029         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
2030         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2031         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
2032
2033         ir_mode  *amode     = mode;
2034         /* optimisation, since shifting in modes < machine_size is usually
2035          * less efficient */
2036         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2037                 amode = mode_uint;
2038         }
2039         unsigned amode_size = get_mode_size_bits(amode);
2040         load_res = create_conv(dbgi, load_res, amode);
2041
2042         set_store(load_mem);
2043
2044         /* kill upper bits */
2045         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2046         int        bitoffset   = entity->compound_member.bit_offset;
2047         int        bitsize     = entity->compound_member.bit_size;
2048         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
2049         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
2050         ir_node   *countl      = new_d_Const(dbgi, tvl);
2051         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
2052
2053         unsigned   shift_bitsr = bitoffset + shift_bitsl;
2054         assert(shift_bitsr <= amode_size);
2055         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
2056         ir_node   *countr      = new_d_Const(dbgi, tvr);
2057         ir_node   *shiftr;
2058         if (mode_is_signed(mode)) {
2059                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2060         } else {
2061                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2062         }
2063
2064         type_t  *type    = expression->base.type;
2065         ir_mode *resmode = get_ir_mode_arithmetic(type);
2066         return create_conv(dbgi, shiftr, resmode);
2067 }
2068
2069 /* make sure the selected compound type is constructed */
2070 static void construct_select_compound(const select_expression_t *expression)
2071 {
2072         type_t *type = skip_typeref(expression->compound->base.type);
2073         if (is_type_pointer(type)) {
2074                 type = type->pointer.points_to;
2075         }
2076         (void) get_ir_type(type);
2077 }
2078
2079 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2080                                               ir_node *value, ir_node *addr)
2081 {
2082         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2083         type_t   *type = skip_typeref(expression->base.type);
2084
2085         if (!is_type_compound(type)) {
2086                 ir_mode  *mode = get_ir_mode_storage(type);
2087                 value          = create_conv(dbgi, value, mode);
2088                 value          = do_strict_conv(dbgi, value);
2089         }
2090
2091         if (expression->kind == EXPR_REFERENCE) {
2092                 const reference_expression_t *ref = &expression->reference;
2093
2094                 entity_t *entity = ref->entity;
2095                 assert(is_declaration(entity));
2096                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2097                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2098                         set_value(entity->variable.v.value_number, value);
2099                         return value;
2100                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2101                         set_value(entity->parameter.v.value_number, value);
2102                         return value;
2103                 }
2104         }
2105
2106         if (addr == NULL)
2107                 addr = expression_to_addr(expression);
2108         assert(addr != NULL);
2109
2110         if (expression->kind == EXPR_SELECT) {
2111                 const select_expression_t *select = &expression->select;
2112
2113                 construct_select_compound(select);
2114
2115                 entity_t *entity = select->compound_entry;
2116                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2117                 if (entity->compound_member.bitfield) {
2118                         ir_entity *irentity = entity->compound_member.entity;
2119                         bool       set_volatile
2120                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2121                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2122                                                        set_volatile);
2123                         return value;
2124                 }
2125         }
2126
2127         assign_value(dbgi, addr, type, value);
2128         return value;
2129 }
2130
2131 static void set_value_for_expression(const expression_t *expression,
2132                                      ir_node *value)
2133 {
2134         set_value_for_expression_addr(expression, value, NULL);
2135 }
2136
2137 static ir_node *get_value_from_lvalue(const expression_t *expression,
2138                                       ir_node *addr)
2139 {
2140         if (expression->kind == EXPR_REFERENCE) {
2141                 const reference_expression_t *ref = &expression->reference;
2142
2143                 entity_t *entity = ref->entity;
2144                 assert(entity->kind == ENTITY_VARIABLE
2145                                 || entity->kind == ENTITY_PARAMETER);
2146                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2147                 int value_number;
2148                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2149                         value_number = entity->variable.v.value_number;
2150                         assert(addr == NULL);
2151                         type_t  *type = skip_typeref(expression->base.type);
2152                         ir_mode *mode = get_ir_mode_storage(type);
2153                         ir_node *res  = get_value(value_number, mode);
2154                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2155                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2156                         value_number = entity->parameter.v.value_number;
2157                         assert(addr == NULL);
2158                         type_t  *type = skip_typeref(expression->base.type);
2159                         ir_mode *mode = get_ir_mode_storage(type);
2160                         ir_node *res  = get_value(value_number, mode);
2161                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2162                 }
2163         }
2164
2165         assert(addr != NULL);
2166         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2167
2168         ir_node *value;
2169         if (expression->kind == EXPR_SELECT &&
2170             expression->select.compound_entry->compound_member.bitfield) {
2171             construct_select_compound(&expression->select);
2172                 value = bitfield_extract_to_firm(&expression->select, addr);
2173         } else {
2174                 value = deref_address(dbgi, expression->base.type, addr);
2175         }
2176
2177         return value;
2178 }
2179
2180
2181 static ir_node *create_incdec(const unary_expression_t *expression)
2182 {
2183         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2184         const expression_t *value_expr = expression->value;
2185         ir_node            *addr       = expression_to_addr(value_expr);
2186         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2187
2188         type_t  *type = skip_typeref(expression->base.type);
2189         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2190
2191         ir_node *offset;
2192         if (is_type_pointer(type)) {
2193                 pointer_type_t *pointer_type = &type->pointer;
2194                 offset = get_type_size_node(pointer_type->points_to);
2195         } else {
2196                 assert(is_type_arithmetic(type));
2197                 offset = new_Const(get_mode_one(mode));
2198         }
2199
2200         ir_node *result;
2201         ir_node *store_value;
2202         switch(expression->base.kind) {
2203         case EXPR_UNARY_POSTFIX_INCREMENT:
2204                 result      = value;
2205                 store_value = new_d_Add(dbgi, value, offset, mode);
2206                 break;
2207         case EXPR_UNARY_POSTFIX_DECREMENT:
2208                 result      = value;
2209                 store_value = new_d_Sub(dbgi, value, offset, mode);
2210                 break;
2211         case EXPR_UNARY_PREFIX_INCREMENT:
2212                 result      = new_d_Add(dbgi, value, offset, mode);
2213                 store_value = result;
2214                 break;
2215         case EXPR_UNARY_PREFIX_DECREMENT:
2216                 result      = new_d_Sub(dbgi, value, offset, mode);
2217                 store_value = result;
2218                 break;
2219         default:
2220                 panic("no incdec expr in create_incdec");
2221         }
2222
2223         set_value_for_expression_addr(value_expr, store_value, addr);
2224
2225         return result;
2226 }
2227
2228 static bool is_local_variable(expression_t *expression)
2229 {
2230         if (expression->kind != EXPR_REFERENCE)
2231                 return false;
2232         reference_expression_t *ref_expr = &expression->reference;
2233         entity_t               *entity   = ref_expr->entity;
2234         if (entity->kind != ENTITY_VARIABLE)
2235                 return false;
2236         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2237         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2238 }
2239
2240 static ir_relation get_relation(const expression_kind_t kind)
2241 {
2242         switch(kind) {
2243         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2244         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2245         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2246         case EXPR_BINARY_ISLESS:
2247         case EXPR_BINARY_LESS:          return ir_relation_less;
2248         case EXPR_BINARY_ISLESSEQUAL:
2249         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2250         case EXPR_BINARY_ISGREATER:
2251         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2252         case EXPR_BINARY_ISGREATEREQUAL:
2253         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2254         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2255
2256         default:
2257                 break;
2258         }
2259         panic("trying to get pn_Cmp from non-comparison binexpr type");
2260 }
2261
2262 /**
2263  * Handle the assume optimizer hint: check if a Confirm
2264  * node can be created.
2265  *
2266  * @param dbi    debug info
2267  * @param expr   the IL assume expression
2268  *
2269  * we support here only some simple cases:
2270  *  - var rel const
2271  *  - const rel val
2272  *  - var rel var
2273  */
2274 static ir_node *handle_assume_compare(dbg_info *dbi,
2275                                       const binary_expression_t *expression)
2276 {
2277         expression_t *op1 = expression->left;
2278         expression_t *op2 = expression->right;
2279         entity_t     *var2, *var = NULL;
2280         ir_node      *res      = NULL;
2281         ir_relation   relation = get_relation(expression->base.kind);
2282
2283         if (is_local_variable(op1) && is_local_variable(op2)) {
2284                 var  = op1->reference.entity;
2285             var2 = op2->reference.entity;
2286
2287                 type_t  *const type = skip_typeref(var->declaration.type);
2288                 ir_mode *const mode = get_ir_mode_storage(type);
2289
2290                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2291                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2292
2293                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2294                 set_value(var2->variable.v.value_number, res);
2295
2296                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2297                 set_value(var->variable.v.value_number, res);
2298
2299                 return res;
2300         }
2301
2302         expression_t *con = NULL;
2303         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2304                 var = op1->reference.entity;
2305                 con = op2;
2306         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2307                 relation = get_inversed_relation(relation);
2308                 var = op2->reference.entity;
2309                 con = op1;
2310         }
2311
2312         if (var != NULL) {
2313                 type_t  *const type = skip_typeref(var->declaration.type);
2314                 ir_mode *const mode = get_ir_mode_storage(type);
2315
2316                 res = get_value(var->variable.v.value_number, mode);
2317                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2318                 set_value(var->variable.v.value_number, res);
2319         }
2320         return res;
2321 }
2322
2323 /**
2324  * Handle the assume optimizer hint.
2325  *
2326  * @param dbi    debug info
2327  * @param expr   the IL assume expression
2328  */
2329 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2330 {
2331         switch(expression->kind) {
2332         case EXPR_BINARY_EQUAL:
2333         case EXPR_BINARY_NOTEQUAL:
2334         case EXPR_BINARY_LESS:
2335         case EXPR_BINARY_LESSEQUAL:
2336         case EXPR_BINARY_GREATER:
2337         case EXPR_BINARY_GREATEREQUAL:
2338                 return handle_assume_compare(dbi, &expression->binary);
2339         default:
2340                 return NULL;
2341         }
2342 }
2343
2344 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2345                             type_t *from_type, type_t *type)
2346 {
2347         type = skip_typeref(type);
2348         if (type == type_void) {
2349                 /* make sure firm type is constructed */
2350                 (void) get_ir_type(type);
2351                 return NULL;
2352         }
2353         if (!is_type_scalar(type)) {
2354                 /* make sure firm type is constructed */
2355                 (void) get_ir_type(type);
2356                 return value_node;
2357         }
2358
2359         from_type     = skip_typeref(from_type);
2360         ir_mode *mode = get_ir_mode_storage(type);
2361         /* check for conversion from / to __based types */
2362         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2363                 const variable_t *from_var = from_type->pointer.base_variable;
2364                 const variable_t *to_var   = type->pointer.base_variable;
2365                 if (from_var != to_var) {
2366                         if (from_var != NULL) {
2367                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2368                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2369                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2370                         }
2371                         if (to_var != NULL) {
2372                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2373                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2374                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2375                         }
2376                 }
2377         }
2378
2379         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2380                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2381                  * convert to mode_b so we only get a 0/1 value */
2382                 value_node = create_conv(dbgi, value_node, mode_b);
2383         }
2384
2385         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2386         ir_node *node       = create_conv(dbgi, value_node, mode);
2387         node                = do_strict_conv(dbgi, node);
2388         node                = create_conv(dbgi, node, mode_arith);
2389
2390         return node;
2391 }
2392
2393 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2394 {
2395         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2396         type_t   *type = skip_typeref(expression->base.type);
2397
2398         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2399                 return expression_to_addr(expression->value);
2400
2401         const expression_t *value = expression->value;
2402
2403         switch(expression->base.kind) {
2404         case EXPR_UNARY_NEGATE: {
2405                 ir_node *value_node = expression_to_firm(value);
2406                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2407                 return new_d_Minus(dbgi, value_node, mode);
2408         }
2409         case EXPR_UNARY_PLUS:
2410                 return expression_to_firm(value);
2411         case EXPR_UNARY_BITWISE_NEGATE: {
2412                 ir_node *value_node = expression_to_firm(value);
2413                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2414                 return new_d_Not(dbgi, value_node, mode);
2415         }
2416         case EXPR_UNARY_NOT: {
2417                 ir_node *value_node = _expression_to_firm(value);
2418                 value_node          = create_conv(dbgi, value_node, mode_b);
2419                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2420                 return res;
2421         }
2422         case EXPR_UNARY_DEREFERENCE: {
2423                 ir_node *value_node = expression_to_firm(value);
2424                 type_t  *value_type = skip_typeref(value->base.type);
2425                 assert(is_type_pointer(value_type));
2426
2427                 /* check for __based */
2428                 const variable_t *const base_var = value_type->pointer.base_variable;
2429                 if (base_var != NULL) {
2430                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2431                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2432                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2433                 }
2434                 type_t  *points_to  = value_type->pointer.points_to;
2435                 return deref_address(dbgi, points_to, value_node);
2436         }
2437         case EXPR_UNARY_POSTFIX_INCREMENT:
2438         case EXPR_UNARY_POSTFIX_DECREMENT:
2439         case EXPR_UNARY_PREFIX_INCREMENT:
2440         case EXPR_UNARY_PREFIX_DECREMENT:
2441                 return create_incdec(expression);
2442         case EXPR_UNARY_CAST: {
2443                 ir_node *value_node = expression_to_firm(value);
2444                 type_t  *from_type  = value->base.type;
2445                 return create_cast(dbgi, value_node, from_type, type);
2446         }
2447         case EXPR_UNARY_ASSUME:
2448                 return handle_assume(dbgi, value);
2449
2450         default:
2451                 break;
2452         }
2453         panic("invalid UNEXPR type found");
2454 }
2455
2456 /**
2457  * produces a 0/1 depending of the value of a mode_b node
2458  */
2459 static ir_node *produce_condition_result(const expression_t *expression,
2460                                          ir_mode *mode, dbg_info *dbgi)
2461 {
2462         ir_node *const one_block  = new_immBlock();
2463         ir_node *const zero_block = new_immBlock();
2464         create_condition_evaluation(expression, one_block, zero_block);
2465         mature_immBlock(one_block);
2466         mature_immBlock(zero_block);
2467
2468         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2469         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2470         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2471         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2472         set_cur_block(block);
2473
2474         ir_node *const one   = new_Const(get_mode_one(mode));
2475         ir_node *const zero  = new_Const(get_mode_null(mode));
2476         ir_node *const in[2] = { one, zero };
2477         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2478
2479         return val;
2480 }
2481
2482 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2483                 ir_node *value, type_t *type)
2484 {
2485         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2486         assert(is_type_pointer(type));
2487         pointer_type_t *const pointer_type = &type->pointer;
2488         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2489         ir_node        *      elem_size    = get_type_size_node(points_to);
2490         elem_size                          = create_conv(dbgi, elem_size, mode);
2491         value                              = create_conv(dbgi, value,     mode);
2492         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2493         return mul;
2494 }
2495
2496 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2497                           ir_node *left, ir_node *right)
2498 {
2499         ir_mode  *mode;
2500         type_t   *type_left  = skip_typeref(expression->left->base.type);
2501         type_t   *type_right = skip_typeref(expression->right->base.type);
2502
2503         expression_kind_t kind = expression->base.kind;
2504
2505         switch (kind) {
2506         case EXPR_BINARY_SHIFTLEFT:
2507         case EXPR_BINARY_SHIFTRIGHT:
2508         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2509         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2510                 mode  = get_ir_mode_arithmetic(expression->base.type);
2511                 right = create_conv(dbgi, right, mode_uint);
2512                 break;
2513
2514         case EXPR_BINARY_SUB:
2515                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2516                         const pointer_type_t *const ptr_type = &type_left->pointer;
2517
2518                         mode = get_ir_mode_arithmetic(expression->base.type);
2519                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2520                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2521                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2522                         ir_node *const no_mem    = new_NoMem();
2523                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2524                                                                                                    mode, op_pin_state_floats);
2525                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2526                 }
2527                 /* fallthrough */
2528         case EXPR_BINARY_SUB_ASSIGN:
2529                 if (is_type_pointer(type_left)) {
2530                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2531                         mode  = get_ir_mode_arithmetic(type_left);
2532                         break;
2533                 }
2534                 goto normal_node;
2535
2536         case EXPR_BINARY_ADD:
2537         case EXPR_BINARY_ADD_ASSIGN:
2538                 if (is_type_pointer(type_left)) {
2539                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2540                         mode  = get_ir_mode_arithmetic(type_left);
2541                         break;
2542                 } else if (is_type_pointer(type_right)) {
2543                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2544                         mode  = get_ir_mode_arithmetic(type_right);
2545                         break;
2546                 }
2547                 goto normal_node;
2548
2549         default:
2550 normal_node:
2551                 mode = get_ir_mode_arithmetic(type_right);
2552                 left = create_conv(dbgi, left, mode);
2553                 break;
2554         }
2555
2556         switch (kind) {
2557         case EXPR_BINARY_ADD_ASSIGN:
2558         case EXPR_BINARY_ADD:
2559                 return new_d_Add(dbgi, left, right, mode);
2560         case EXPR_BINARY_SUB_ASSIGN:
2561         case EXPR_BINARY_SUB:
2562                 return new_d_Sub(dbgi, left, right, mode);
2563         case EXPR_BINARY_MUL_ASSIGN:
2564         case EXPR_BINARY_MUL:
2565                 return new_d_Mul(dbgi, left, right, mode);
2566         case EXPR_BINARY_BITWISE_AND:
2567         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2568                 return new_d_And(dbgi, left, right, mode);
2569         case EXPR_BINARY_BITWISE_OR:
2570         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2571                 return new_d_Or(dbgi, left, right, mode);
2572         case EXPR_BINARY_BITWISE_XOR:
2573         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2574                 return new_d_Eor(dbgi, left, right, mode);
2575         case EXPR_BINARY_SHIFTLEFT:
2576         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2577                 return new_d_Shl(dbgi, left, right, mode);
2578         case EXPR_BINARY_SHIFTRIGHT:
2579         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2580                 if (mode_is_signed(mode)) {
2581                         return new_d_Shrs(dbgi, left, right, mode);
2582                 } else {
2583                         return new_d_Shr(dbgi, left, right, mode);
2584                 }
2585         case EXPR_BINARY_DIV:
2586         case EXPR_BINARY_DIV_ASSIGN: {
2587                 ir_node *pin = new_Pin(new_NoMem());
2588                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2589                                          op_pin_state_floats);
2590                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2591                 return res;
2592         }
2593         case EXPR_BINARY_MOD:
2594         case EXPR_BINARY_MOD_ASSIGN: {
2595                 ir_node *pin = new_Pin(new_NoMem());
2596                 assert(!mode_is_float(mode));
2597                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2598                                          op_pin_state_floats);
2599                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2600                 return res;
2601         }
2602         default:
2603                 panic("unexpected expression kind");
2604         }
2605 }
2606
2607 static ir_node *create_lazy_op(const binary_expression_t *expression)
2608 {
2609         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2610         type_t   *type = skip_typeref(expression->base.type);
2611         ir_mode  *mode = get_ir_mode_arithmetic(type);
2612
2613         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2614                 bool val = fold_constant_to_bool(expression->left);
2615                 expression_kind_t ekind = expression->base.kind;
2616                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2617                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2618                         if (!val) {
2619                                 return new_Const(get_mode_null(mode));
2620                         }
2621                 } else {
2622                         if (val) {
2623                                 return new_Const(get_mode_one(mode));
2624                         }
2625                 }
2626
2627                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2628                         bool valr = fold_constant_to_bool(expression->right);
2629                         return create_Const_from_bool(mode, valr);
2630                 }
2631
2632                 return produce_condition_result(expression->right, mode, dbgi);
2633         }
2634
2635         return produce_condition_result((const expression_t*) expression, mode,
2636                                         dbgi);
2637 }
2638
2639 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2640                                             ir_node *right, ir_mode *mode);
2641
2642 static ir_node *create_assign_binop(const binary_expression_t *expression)
2643 {
2644         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2645         const expression_t *left_expr = expression->left;
2646         type_t             *type      = skip_typeref(left_expr->base.type);
2647         ir_node            *right     = expression_to_firm(expression->right);
2648         ir_node            *left_addr = expression_to_addr(left_expr);
2649         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2650         ir_node            *result    = create_op(dbgi, expression, left, right);
2651
2652         result = create_cast(dbgi, result, expression->right->base.type, type);
2653         result = do_strict_conv(dbgi, result);
2654
2655         result = set_value_for_expression_addr(left_expr, result, left_addr);
2656
2657         if (!is_type_compound(type)) {
2658                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2659                 result = create_conv(dbgi, result, mode_arithmetic);
2660         }
2661         return result;
2662 }
2663
2664 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2665 {
2666         expression_kind_t kind = expression->base.kind;
2667
2668         switch(kind) {
2669         case EXPR_BINARY_EQUAL:
2670         case EXPR_BINARY_NOTEQUAL:
2671         case EXPR_BINARY_LESS:
2672         case EXPR_BINARY_LESSEQUAL:
2673         case EXPR_BINARY_GREATER:
2674         case EXPR_BINARY_GREATEREQUAL:
2675         case EXPR_BINARY_ISGREATER:
2676         case EXPR_BINARY_ISGREATEREQUAL:
2677         case EXPR_BINARY_ISLESS:
2678         case EXPR_BINARY_ISLESSEQUAL:
2679         case EXPR_BINARY_ISLESSGREATER:
2680         case EXPR_BINARY_ISUNORDERED: {
2681                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2682                 ir_node    *left     = expression_to_firm(expression->left);
2683                 ir_node    *right    = expression_to_firm(expression->right);
2684                 ir_relation relation = get_relation(kind);
2685                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2686                 return cmp;
2687         }
2688         case EXPR_BINARY_ASSIGN: {
2689                 ir_node *addr  = expression_to_addr(expression->left);
2690                 ir_node *right = expression_to_firm(expression->right);
2691                 ir_node *res
2692                         = set_value_for_expression_addr(expression->left, right, addr);
2693
2694                 type_t  *type            = skip_typeref(expression->base.type);
2695                 if (!is_type_compound(type)) {
2696                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2697                         res                      = create_conv(NULL, res, mode_arithmetic);
2698                 }
2699                 return res;
2700         }
2701         case EXPR_BINARY_ADD:
2702         case EXPR_BINARY_SUB:
2703         case EXPR_BINARY_MUL:
2704         case EXPR_BINARY_DIV:
2705         case EXPR_BINARY_MOD:
2706         case EXPR_BINARY_BITWISE_AND:
2707         case EXPR_BINARY_BITWISE_OR:
2708         case EXPR_BINARY_BITWISE_XOR:
2709         case EXPR_BINARY_SHIFTLEFT:
2710         case EXPR_BINARY_SHIFTRIGHT:
2711         {
2712                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2713                 ir_node  *left  = expression_to_firm(expression->left);
2714                 ir_node  *right = expression_to_firm(expression->right);
2715                 return create_op(dbgi, expression, left, right);
2716         }
2717         case EXPR_BINARY_LOGICAL_AND:
2718         case EXPR_BINARY_LOGICAL_OR:
2719                 return create_lazy_op(expression);
2720         case EXPR_BINARY_COMMA:
2721                 /* create side effects of left side */
2722                 (void) expression_to_firm(expression->left);
2723                 return _expression_to_firm(expression->right);
2724
2725         case EXPR_BINARY_ADD_ASSIGN:
2726         case EXPR_BINARY_SUB_ASSIGN:
2727         case EXPR_BINARY_MUL_ASSIGN:
2728         case EXPR_BINARY_MOD_ASSIGN:
2729         case EXPR_BINARY_DIV_ASSIGN:
2730         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2731         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2732         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2733         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2734         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2735                 return create_assign_binop(expression);
2736         default:
2737                 panic("TODO binexpr type");
2738         }
2739 }
2740
2741 static ir_node *array_access_addr(const array_access_expression_t *expression)
2742 {
2743         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2744         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2745         ir_node  *offset      = expression_to_firm(expression->index);
2746         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2747         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2748         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2749
2750         return result;
2751 }
2752
2753 static ir_node *array_access_to_firm(
2754                 const array_access_expression_t *expression)
2755 {
2756         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2757         ir_node  *addr   = array_access_addr(expression);
2758         type_t   *type   = revert_automatic_type_conversion(
2759                         (const expression_t*) expression);
2760         type             = skip_typeref(type);
2761
2762         return deref_address(dbgi, type, addr);
2763 }
2764
2765 static long get_offsetof_offset(const offsetof_expression_t *expression)
2766 {
2767         type_t *orig_type = expression->type;
2768         long    offset    = 0;
2769
2770         designator_t *designator = expression->designator;
2771         for ( ; designator != NULL; designator = designator->next) {
2772                 type_t *type = skip_typeref(orig_type);
2773                 /* be sure the type is constructed */
2774                 (void) get_ir_type(type);
2775
2776                 if (designator->symbol != NULL) {
2777                         assert(is_type_compound(type));
2778                         symbol_t *symbol = designator->symbol;
2779
2780                         compound_t *compound = type->compound.compound;
2781                         entity_t   *iter     = compound->members.entities;
2782                         for ( ; iter != NULL; iter = iter->base.next) {
2783                                 if (iter->base.symbol == symbol) {
2784                                         break;
2785                                 }
2786                         }
2787                         assert(iter != NULL);
2788
2789                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2790                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2791                         offset += get_entity_offset(iter->compound_member.entity);
2792
2793                         orig_type = iter->declaration.type;
2794                 } else {
2795                         expression_t *array_index = designator->array_index;
2796                         assert(designator->array_index != NULL);
2797                         assert(is_type_array(type));
2798
2799                         long index         = fold_constant_to_int(array_index);
2800                         ir_type *arr_type  = get_ir_type(type);
2801                         ir_type *elem_type = get_array_element_type(arr_type);
2802                         long     elem_size = get_type_size_bytes(elem_type);
2803
2804                         offset += index * elem_size;
2805
2806                         orig_type = type->array.element_type;
2807                 }
2808         }
2809
2810         return offset;
2811 }
2812
2813 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2814 {
2815         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2816         long       offset = get_offsetof_offset(expression);
2817         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2818         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2819
2820         return new_d_Const(dbgi, tv);
2821 }
2822
2823 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2824                                      ir_entity *entity, type_t *type);
2825
2826 static ir_node *compound_literal_to_firm(
2827                 const compound_literal_expression_t *expression)
2828 {
2829         type_t *type = expression->type;
2830
2831         /* create an entity on the stack */
2832         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2833
2834         ident     *const id     = id_unique("CompLit.%u");
2835         ir_type   *const irtype = get_ir_type(type);
2836         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2837         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2838         set_entity_ld_ident(entity, id);
2839
2840         /* create initialisation code */
2841         initializer_t *initializer = expression->initializer;
2842         create_local_initializer(initializer, dbgi, entity, type);
2843
2844         /* create a sel for the compound literal address */
2845         ir_node *frame = get_irg_frame(current_ir_graph);
2846         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2847         return sel;
2848 }
2849
2850 /**
2851  * Transform a sizeof expression into Firm code.
2852  */
2853 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2854 {
2855         type_t *const type = skip_typeref(expression->type);
2856         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2857         if (is_type_array(type) && type->array.is_vla
2858                         && expression->tp_expression != NULL) {
2859                 expression_to_firm(expression->tp_expression);
2860         }
2861         /* strange gnu extensions: sizeof(function) == 1 */
2862         if (is_type_function(type)) {
2863                 ir_mode *mode = get_ir_mode_storage(type_size_t);
2864                 return new_Const(get_mode_one(mode));
2865         }
2866
2867         return get_type_size_node(type);
2868 }
2869
2870 static entity_t *get_expression_entity(const expression_t *expression)
2871 {
2872         if (expression->kind != EXPR_REFERENCE)
2873                 return NULL;
2874
2875         return expression->reference.entity;
2876 }
2877
2878 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2879 {
2880         switch(entity->kind) {
2881         DECLARATION_KIND_CASES
2882                 return entity->declaration.alignment;
2883         case ENTITY_STRUCT:
2884         case ENTITY_UNION:
2885                 return entity->compound.alignment;
2886         case ENTITY_TYPEDEF:
2887                 return entity->typedefe.alignment;
2888         default:
2889                 break;
2890         }
2891         return 0;
2892 }
2893
2894 /**
2895  * Transform an alignof expression into Firm code.
2896  */
2897 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2898 {
2899         unsigned alignment = 0;
2900
2901         const expression_t *tp_expression = expression->tp_expression;
2902         if (tp_expression != NULL) {
2903                 entity_t *entity = get_expression_entity(tp_expression);
2904                 if (entity != NULL) {
2905                         if (entity->kind == ENTITY_FUNCTION) {
2906                                 /* a gnu-extension */
2907                                 alignment = 1;
2908                         } else {
2909                                 alignment = get_cparser_entity_alignment(entity);
2910                         }
2911                 }
2912         }
2913
2914         if (alignment == 0) {
2915                 type_t *type = expression->type;
2916                 alignment = get_type_alignment(type);
2917         }
2918
2919         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
2920         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
2921         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2922         return new_d_Const(dbgi, tv);
2923 }
2924
2925 static void init_ir_types(void);
2926
2927 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2928 {
2929         assert(is_type_valid(skip_typeref(expression->base.type)));
2930
2931         bool constant_folding_old = constant_folding;
2932         constant_folding = true;
2933
2934         init_ir_types();
2935
2936         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2937
2938         ir_graph *old_current_ir_graph = current_ir_graph;
2939         current_ir_graph = get_const_code_irg();
2940
2941         ir_node *cnst = expression_to_firm(expression);
2942         current_ir_graph = old_current_ir_graph;
2943
2944         if (!is_Const(cnst)) {
2945                 panic("couldn't fold constant");
2946         }
2947
2948         constant_folding = constant_folding_old;
2949
2950         return get_Const_tarval(cnst);
2951 }
2952
2953 /* this function is only used in parser.c, but it relies on libfirm functionality */
2954 bool constant_is_negative(const expression_t *expression)
2955 {
2956         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2957         ir_tarval *tv = fold_constant_to_tarval(expression);
2958         return tarval_is_negative(tv);
2959 }
2960
2961 long fold_constant_to_int(const expression_t *expression)
2962 {
2963         if (expression->kind == EXPR_ERROR)
2964                 return 0;
2965
2966         ir_tarval *tv = fold_constant_to_tarval(expression);
2967         if (!tarval_is_long(tv)) {
2968                 panic("result of constant folding is not integer");
2969         }
2970
2971         return get_tarval_long(tv);
2972 }
2973
2974 bool fold_constant_to_bool(const expression_t *expression)
2975 {
2976         if (expression->kind == EXPR_ERROR)
2977                 return false;
2978         ir_tarval *tv = fold_constant_to_tarval(expression);
2979         return !tarval_is_null(tv);
2980 }
2981
2982 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2983 {
2984         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2985
2986         /* first try to fold a constant condition */
2987         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2988                 bool val = fold_constant_to_bool(expression->condition);
2989                 if (val) {
2990                         expression_t *true_expression = expression->true_expression;
2991                         if (true_expression == NULL)
2992                                 true_expression = expression->condition;
2993                         return expression_to_firm(true_expression);
2994                 } else {
2995                         return expression_to_firm(expression->false_expression);
2996                 }
2997         }
2998
2999         ir_node *const true_block  = new_immBlock();
3000         ir_node *const false_block = new_immBlock();
3001         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3002         mature_immBlock(true_block);
3003         mature_immBlock(false_block);
3004
3005         set_cur_block(true_block);
3006         ir_node *true_val;
3007         if (expression->true_expression != NULL) {
3008                 true_val = expression_to_firm(expression->true_expression);
3009         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3010                 true_val = cond_expr;
3011         } else {
3012                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3013                  * comparison.  Generate a "1" as value for the true branch. */
3014                 true_val = new_Const(get_mode_one(mode_Is));
3015         }
3016         ir_node *const true_jmp = new_d_Jmp(dbgi);
3017
3018         set_cur_block(false_block);
3019         ir_node *const false_val = expression_to_firm(expression->false_expression);
3020         ir_node *const false_jmp = new_d_Jmp(dbgi);
3021
3022         /* create the common block */
3023         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3024         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3025         set_cur_block(block);
3026
3027         /* TODO improve static semantics, so either both or no values are NULL */
3028         if (true_val == NULL || false_val == NULL)
3029                 return NULL;
3030
3031         ir_node *const in[2] = { true_val, false_val };
3032         type_t  *const type  = skip_typeref(expression->base.type);
3033         ir_mode *mode;
3034         if (is_type_compound(type)) {
3035                 mode = mode_P;
3036         } else {
3037                 mode = get_ir_mode_arithmetic(type);
3038         }
3039         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3040
3041         return val;
3042 }
3043
3044 /**
3045  * Returns an IR-node representing the address of a field.
3046  */
3047 static ir_node *select_addr(const select_expression_t *expression)
3048 {
3049         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3050
3051         construct_select_compound(expression);
3052
3053         ir_node *compound_addr = expression_to_firm(expression->compound);
3054
3055         entity_t *entry = expression->compound_entry;
3056         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3057         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3058
3059         if (constant_folding) {
3060                 ir_mode *mode = get_irn_mode(compound_addr);
3061                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3062                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3063                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3064         } else {
3065                 ir_entity *irentity = entry->compound_member.entity;
3066                 assert(irentity != NULL);
3067                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3068         }
3069 }
3070
3071 static ir_node *select_to_firm(const select_expression_t *expression)
3072 {
3073         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3074         ir_node  *addr = select_addr(expression);
3075         type_t   *type = revert_automatic_type_conversion(
3076                         (const expression_t*) expression);
3077         type           = skip_typeref(type);
3078
3079         entity_t *entry = expression->compound_entry;
3080         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3081
3082         if (entry->compound_member.bitfield) {
3083                 return bitfield_extract_to_firm(expression, addr);
3084         }
3085
3086         return deref_address(dbgi, type, addr);
3087 }
3088
3089 /* Values returned by __builtin_classify_type. */
3090 typedef enum gcc_type_class
3091 {
3092         no_type_class = -1,
3093         void_type_class,
3094         integer_type_class,
3095         char_type_class,
3096         enumeral_type_class,
3097         boolean_type_class,
3098         pointer_type_class,
3099         reference_type_class,
3100         offset_type_class,
3101         real_type_class,
3102         complex_type_class,
3103         function_type_class,
3104         method_type_class,
3105         record_type_class,
3106         union_type_class,
3107         array_type_class,
3108         string_type_class,
3109         set_type_class,
3110         file_type_class,
3111         lang_type_class
3112 } gcc_type_class;
3113
3114 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3115 {
3116         type_t *type = expr->type_expression->base.type;
3117
3118         /* FIXME gcc returns different values depending on whether compiling C or C++
3119          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3120         gcc_type_class tc;
3121         for (;;) {
3122                 type = skip_typeref(type);
3123                 switch (type->kind) {
3124                         case TYPE_ATOMIC: {
3125                                 const atomic_type_t *const atomic_type = &type->atomic;
3126                                 switch (atomic_type->akind) {
3127                                         /* should not be reached */
3128                                         case ATOMIC_TYPE_INVALID:
3129                                                 tc = no_type_class;
3130                                                 goto make_const;
3131
3132                                         /* gcc cannot do that */
3133                                         case ATOMIC_TYPE_VOID:
3134                                                 tc = void_type_class;
3135                                                 goto make_const;
3136
3137                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3138                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3139                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3140                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3141                                         case ATOMIC_TYPE_SHORT:
3142                                         case ATOMIC_TYPE_USHORT:
3143                                         case ATOMIC_TYPE_INT:
3144                                         case ATOMIC_TYPE_UINT:
3145                                         case ATOMIC_TYPE_LONG:
3146                                         case ATOMIC_TYPE_ULONG:
3147                                         case ATOMIC_TYPE_LONGLONG:
3148                                         case ATOMIC_TYPE_ULONGLONG:
3149                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3150                                                 tc = integer_type_class;
3151                                                 goto make_const;
3152
3153                                         case ATOMIC_TYPE_FLOAT:
3154                                         case ATOMIC_TYPE_DOUBLE:
3155                                         case ATOMIC_TYPE_LONG_DOUBLE:
3156                                                 tc = real_type_class;
3157                                                 goto make_const;
3158                                 }
3159                                 panic("Unexpected atomic type in classify_type_to_firm().");
3160                         }
3161
3162                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3163                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3164                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3165                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3166                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3167                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3168                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3169
3170                         /* gcc handles this as integer */
3171                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3172
3173                         /* gcc classifies the referenced type */
3174                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3175
3176                         /* typedef/typeof should be skipped already */
3177                         case TYPE_TYPEDEF:
3178                         case TYPE_TYPEOF:
3179                         case TYPE_ERROR:
3180                                 break;
3181                 }
3182                 panic("unexpected TYPE classify_type_to_firm().");
3183         }
3184
3185 make_const:;
3186         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3187         ir_tarval *const tv   = new_tarval_from_long(tc, mode_int);
3188         return new_d_Const(dbgi, tv);
3189 }
3190
3191 static ir_node *function_name_to_firm(
3192                 const funcname_expression_t *const expr)
3193 {
3194         switch(expr->kind) {
3195         case FUNCNAME_FUNCTION:
3196         case FUNCNAME_PRETTY_FUNCTION:
3197         case FUNCNAME_FUNCDNAME:
3198                 if (current_function_name == NULL) {
3199                         const source_position_t *const src_pos = &expr->base.source_position;
3200                         const char    *name  = current_function_entity->base.symbol->string;
3201                         const string_t string = { name, strlen(name) + 1 };
3202                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3203                 }
3204                 return current_function_name;
3205         case FUNCNAME_FUNCSIG:
3206                 if (current_funcsig == NULL) {
3207                         const source_position_t *const src_pos = &expr->base.source_position;
3208                         ir_entity *ent = get_irg_entity(current_ir_graph);
3209                         const char *const name = get_entity_ld_name(ent);
3210                         const string_t string = { name, strlen(name) + 1 };
3211                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3212                 }
3213                 return current_funcsig;
3214         }
3215         panic("Unsupported function name");
3216 }
3217
3218 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3219 {
3220         statement_t *statement = expr->statement;
3221
3222         assert(statement->kind == STATEMENT_COMPOUND);
3223         return compound_statement_to_firm(&statement->compound);
3224 }
3225
3226 static ir_node *va_start_expression_to_firm(
3227         const va_start_expression_t *const expr)
3228 {
3229         ir_entity *param_ent = current_vararg_entity;
3230         if (param_ent == NULL) {
3231                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3232                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3233                 ir_type *const param_type  = get_unknown_type();
3234                 param_ent = new_parameter_entity(frame_type, n, param_type);
3235                 current_vararg_entity = param_ent;
3236         }
3237
3238         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3239         dbg_info *const dbgi    = get_dbg_info(&expr->base.source_position);
3240         ir_node  *const no_mem  = new_NoMem();
3241         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3242
3243         set_value_for_expression(expr->ap, arg_sel);
3244
3245         return NULL;
3246 }
3247
3248 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3249 {
3250         type_t       *const type    = expr->base.type;
3251         expression_t *const ap_expr = expr->ap;
3252         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3253         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3254         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3255         ir_node      *const res     = deref_address(dbgi, type, ap);
3256
3257         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3258         ir_mode      *const mode    = get_irn_mode(cnst);
3259         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3260         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3261         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3262         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3263         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3264
3265         set_value_for_expression_addr(ap_expr, add, ap_addr);
3266
3267         return res;
3268 }
3269
3270 /**
3271  * Generate Firm for a va_copy expression.
3272  */
3273 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3274 {
3275         ir_node *const src = expression_to_firm(expr->src);
3276         set_value_for_expression(expr->dst, src);
3277         return NULL;
3278 }
3279
3280 static ir_node *dereference_addr(const unary_expression_t *const expression)
3281 {
3282         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3283         return expression_to_firm(expression->value);
3284 }
3285
3286 /**
3287  * Returns a IR-node representing an lvalue of the given expression.
3288  */
3289 static ir_node *expression_to_addr(const expression_t *expression)
3290 {
3291         switch(expression->kind) {
3292         case EXPR_ARRAY_ACCESS:
3293                 return array_access_addr(&expression->array_access);
3294         case EXPR_CALL:
3295                 return call_expression_to_firm(&expression->call);
3296         case EXPR_COMPOUND_LITERAL:
3297                 return compound_literal_to_firm(&expression->compound_literal);
3298         case EXPR_REFERENCE:
3299                 return reference_addr(&expression->reference);
3300         case EXPR_SELECT:
3301                 return select_addr(&expression->select);
3302         case EXPR_UNARY_DEREFERENCE:
3303                 return dereference_addr(&expression->unary);
3304         default:
3305                 break;
3306         }
3307         panic("trying to get address of non-lvalue");
3308 }
3309
3310 static ir_node *builtin_constant_to_firm(
3311                 const builtin_constant_expression_t *expression)
3312 {
3313         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3314         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3315         return create_Const_from_bool(mode, v);
3316 }
3317
3318 static ir_node *builtin_types_compatible_to_firm(
3319                 const builtin_types_compatible_expression_t *expression)
3320 {
3321         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3322         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3323         bool     const value = types_compatible(left, right);
3324         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3325         return create_Const_from_bool(mode, value);
3326 }
3327
3328 static ir_node *get_label_block(label_t *label)
3329 {
3330         if (label->block != NULL)
3331                 return label->block;
3332
3333         /* beware: might be called from create initializer with current_ir_graph
3334          * set to const_code_irg. */
3335         ir_graph *rem    = current_ir_graph;
3336         current_ir_graph = current_function;
3337
3338         ir_node *block = new_immBlock();
3339
3340         label->block = block;
3341
3342         ARR_APP1(label_t *, all_labels, label);
3343
3344         current_ir_graph = rem;
3345         return block;
3346 }
3347
3348 /**
3349  * Pointer to a label.  This is used for the
3350  * GNU address-of-label extension.
3351  */
3352 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3353 {
3354         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3355         ir_node   *block  = get_label_block(label->label);
3356         ir_entity *entity = create_Block_entity(block);
3357
3358         symconst_symbol value;
3359         value.entity_p = entity;
3360         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3361 }
3362
3363 static ir_node *error_to_firm(const expression_t *expression)
3364 {
3365         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3366         return new_Bad(mode);
3367 }
3368
3369 /**
3370  * creates firm nodes for an expression. The difference between this function
3371  * and expression_to_firm is, that this version might produce mode_b nodes
3372  * instead of mode_Is.
3373  */
3374 static ir_node *_expression_to_firm(const expression_t *expression)
3375 {
3376 #ifndef NDEBUG
3377         if (!constant_folding) {
3378                 assert(!expression->base.transformed);
3379                 ((expression_t*) expression)->base.transformed = true;
3380         }
3381 #endif
3382
3383         switch (expression->kind) {
3384         EXPR_LITERAL_CASES
3385                 return literal_to_firm(&expression->literal);
3386         case EXPR_STRING_LITERAL:
3387                 return string_to_firm(&expression->base.source_position, "str.%u",
3388                                       &expression->literal.value);
3389         case EXPR_WIDE_STRING_LITERAL:
3390                 return wide_string_literal_to_firm(&expression->string_literal);
3391         case EXPR_REFERENCE:
3392                 return reference_expression_to_firm(&expression->reference);
3393         case EXPR_REFERENCE_ENUM_VALUE:
3394                 return reference_expression_enum_value_to_firm(&expression->reference);
3395         case EXPR_CALL:
3396                 return call_expression_to_firm(&expression->call);
3397         EXPR_UNARY_CASES
3398                 return unary_expression_to_firm(&expression->unary);
3399         EXPR_BINARY_CASES
3400                 return binary_expression_to_firm(&expression->binary);
3401         case EXPR_ARRAY_ACCESS:
3402                 return array_access_to_firm(&expression->array_access);
3403         case EXPR_SIZEOF:
3404                 return sizeof_to_firm(&expression->typeprop);
3405         case EXPR_ALIGNOF:
3406                 return alignof_to_firm(&expression->typeprop);
3407         case EXPR_CONDITIONAL:
3408                 return conditional_to_firm(&expression->conditional);
3409         case EXPR_SELECT:
3410                 return select_to_firm(&expression->select);
3411         case EXPR_CLASSIFY_TYPE:
3412                 return classify_type_to_firm(&expression->classify_type);
3413         case EXPR_FUNCNAME:
3414                 return function_name_to_firm(&expression->funcname);
3415         case EXPR_STATEMENT:
3416                 return statement_expression_to_firm(&expression->statement);
3417         case EXPR_VA_START:
3418                 return va_start_expression_to_firm(&expression->va_starte);
3419         case EXPR_VA_ARG:
3420                 return va_arg_expression_to_firm(&expression->va_arge);
3421         case EXPR_VA_COPY:
3422                 return va_copy_expression_to_firm(&expression->va_copye);
3423         case EXPR_BUILTIN_CONSTANT_P:
3424                 return builtin_constant_to_firm(&expression->builtin_constant);
3425         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3426                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3427         case EXPR_OFFSETOF:
3428                 return offsetof_to_firm(&expression->offsetofe);
3429         case EXPR_COMPOUND_LITERAL:
3430                 return compound_literal_to_firm(&expression->compound_literal);
3431         case EXPR_LABEL_ADDRESS:
3432                 return label_address_to_firm(&expression->label_address);
3433
3434         case EXPR_ERROR:
3435                 return error_to_firm(expression);
3436         }
3437         panic("invalid expression found");
3438 }
3439
3440 /**
3441  * Check if a given expression is a GNU __builtin_expect() call.
3442  */
3443 static bool is_builtin_expect(const expression_t *expression)
3444 {
3445         if (expression->kind != EXPR_CALL)
3446                 return false;
3447
3448         expression_t *function = expression->call.function;
3449         if (function->kind != EXPR_REFERENCE)
3450                 return false;
3451         reference_expression_t *ref = &function->reference;
3452         if (ref->entity->kind         != ENTITY_FUNCTION ||
3453             ref->entity->function.btk != BUILTIN_EXPECT)
3454                 return false;
3455
3456         return true;
3457 }
3458
3459 static bool produces_mode_b(const expression_t *expression)
3460 {
3461         switch (expression->kind) {
3462         case EXPR_BINARY_EQUAL:
3463         case EXPR_BINARY_NOTEQUAL:
3464         case EXPR_BINARY_LESS:
3465         case EXPR_BINARY_LESSEQUAL:
3466         case EXPR_BINARY_GREATER:
3467         case EXPR_BINARY_GREATEREQUAL:
3468         case EXPR_BINARY_ISGREATER:
3469         case EXPR_BINARY_ISGREATEREQUAL:
3470         case EXPR_BINARY_ISLESS:
3471         case EXPR_BINARY_ISLESSEQUAL:
3472         case EXPR_BINARY_ISLESSGREATER:
3473         case EXPR_BINARY_ISUNORDERED:
3474         case EXPR_UNARY_NOT:
3475                 return true;
3476
3477         case EXPR_CALL:
3478                 if (is_builtin_expect(expression)) {
3479                         expression_t *argument = expression->call.arguments->expression;
3480                         return produces_mode_b(argument);
3481                 }
3482                 return false;
3483         case EXPR_BINARY_COMMA:
3484                 return produces_mode_b(expression->binary.right);
3485
3486         default:
3487                 return false;
3488         }
3489 }
3490
3491 static ir_node *expression_to_firm(const expression_t *expression)
3492 {
3493         if (!produces_mode_b(expression)) {
3494                 ir_node *res = _expression_to_firm(expression);
3495                 assert(res == NULL || get_irn_mode(res) != mode_b);
3496                 return res;
3497         }
3498
3499         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3500                 bool const constant_folding_old = constant_folding;
3501                 constant_folding = true;
3502                 ir_node *res  = _expression_to_firm(expression);
3503                 constant_folding = constant_folding_old;
3504                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3505                 assert(is_Const(res));
3506                 return create_Const_from_bool(mode, !is_Const_null(res));
3507         }
3508
3509         /* we have to produce a 0/1 from the mode_b expression */
3510         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3511         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3512         return produce_condition_result(expression, mode, dbgi);
3513 }
3514
3515 /**
3516  * create a short-circuit expression evaluation that tries to construct
3517  * efficient control flow structures for &&, || and ! expressions
3518  */
3519 static ir_node *create_condition_evaluation(const expression_t *expression,
3520                                             ir_node *true_block,
3521                                             ir_node *false_block)
3522 {
3523         switch(expression->kind) {
3524         case EXPR_UNARY_NOT: {
3525                 const unary_expression_t *unary_expression = &expression->unary;
3526                 create_condition_evaluation(unary_expression->value, false_block,
3527                                             true_block);
3528                 return NULL;
3529         }
3530         case EXPR_BINARY_LOGICAL_AND: {
3531                 const binary_expression_t *binary_expression = &expression->binary;
3532
3533                 ir_node *extra_block = new_immBlock();
3534                 create_condition_evaluation(binary_expression->left, extra_block,
3535                                             false_block);
3536                 mature_immBlock(extra_block);
3537                 set_cur_block(extra_block);
3538                 create_condition_evaluation(binary_expression->right, true_block,
3539                                             false_block);
3540                 return NULL;
3541         }
3542         case EXPR_BINARY_LOGICAL_OR: {
3543                 const binary_expression_t *binary_expression = &expression->binary;
3544
3545                 ir_node *extra_block = new_immBlock();
3546                 create_condition_evaluation(binary_expression->left, true_block,
3547                                             extra_block);
3548                 mature_immBlock(extra_block);
3549                 set_cur_block(extra_block);
3550                 create_condition_evaluation(binary_expression->right, true_block,
3551                                             false_block);
3552                 return NULL;
3553         }
3554         default:
3555                 break;
3556         }
3557
3558         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3559         ir_node  *cond_expr  = _expression_to_firm(expression);
3560         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3561         ir_node  *cond       = new_d_Cond(dbgi, condition);
3562         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3563         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3564
3565         /* set branch prediction info based on __builtin_expect */
3566         if (is_builtin_expect(expression) && is_Cond(cond)) {
3567                 call_argument_t *argument = expression->call.arguments->next;
3568                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3569                         bool               const cnst = fold_constant_to_bool(argument->expression);
3570                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3571                         set_Cond_jmp_pred(cond, pred);
3572                 }
3573         }
3574
3575         add_immBlock_pred(true_block, true_proj);
3576         add_immBlock_pred(false_block, false_proj);
3577
3578         set_unreachable_now();
3579         return cond_expr;
3580 }
3581
3582 static void create_variable_entity(entity_t *variable,
3583                                    declaration_kind_t declaration_kind,
3584                                    ir_type *parent_type)
3585 {
3586         assert(variable->kind == ENTITY_VARIABLE);
3587         type_t    *type = skip_typeref(variable->declaration.type);
3588
3589         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3590         ir_type   *const irtype    = get_ir_type(type);
3591         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3592         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3593         unsigned         alignment = variable->declaration.alignment;
3594
3595         set_entity_alignment(irentity, alignment);
3596
3597         handle_decl_modifiers(irentity, variable);
3598
3599         variable->declaration.kind  = (unsigned char) declaration_kind;
3600         variable->variable.v.entity = irentity;
3601         set_entity_ld_ident(irentity, create_ld_ident(variable));
3602
3603         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3604                 set_entity_volatility(irentity, volatility_is_volatile);
3605         }
3606 }
3607
3608
3609 typedef struct type_path_entry_t type_path_entry_t;
3610 struct type_path_entry_t {
3611         type_t           *type;
3612         ir_initializer_t *initializer;
3613         size_t            index;
3614         entity_t         *compound_entry;
3615 };
3616
3617 typedef struct type_path_t type_path_t;
3618 struct type_path_t {
3619         type_path_entry_t *path;
3620         type_t            *top_type;
3621         bool               invalid;
3622 };
3623
3624 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3625 {
3626         size_t len = ARR_LEN(path->path);
3627
3628         for (size_t i = 0; i < len; ++i) {
3629                 const type_path_entry_t *entry = & path->path[i];
3630
3631                 type_t *type = skip_typeref(entry->type);
3632                 if (is_type_compound(type)) {
3633                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3634                 } else if (is_type_array(type)) {
3635                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3636                 } else {
3637                         fprintf(stderr, "-INVALID-");
3638                 }
3639         }
3640         fprintf(stderr, "  (");
3641         print_type(path->top_type);
3642         fprintf(stderr, ")");
3643 }
3644
3645 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3646 {
3647         size_t len = ARR_LEN(path->path);
3648         assert(len > 0);
3649         return & path->path[len-1];
3650 }
3651
3652 static type_path_entry_t *append_to_type_path(type_path_t *path)
3653 {
3654         size_t len = ARR_LEN(path->path);
3655         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3656
3657         type_path_entry_t *result = & path->path[len];
3658         memset(result, 0, sizeof(result[0]));
3659         return result;
3660 }
3661
3662 static size_t get_compound_member_count(const compound_type_t *type)
3663 {
3664         compound_t *compound  = type->compound;
3665         size_t      n_members = 0;
3666         entity_t   *member    = compound->members.entities;
3667         for ( ; member != NULL; member = member->base.next) {
3668                 ++n_members;
3669         }
3670
3671         return n_members;
3672 }
3673
3674 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3675 {
3676         type_t *orig_top_type = path->top_type;
3677         type_t *top_type      = skip_typeref(orig_top_type);
3678
3679         assert(is_type_compound(top_type) || is_type_array(top_type));
3680
3681         if (ARR_LEN(path->path) == 0) {
3682                 return NULL;
3683         } else {
3684                 type_path_entry_t *top         = get_type_path_top(path);
3685                 ir_initializer_t  *initializer = top->initializer;
3686                 return get_initializer_compound_value(initializer, top->index);
3687         }
3688 }
3689
3690 static void descend_into_subtype(type_path_t *path)
3691 {
3692         type_t *orig_top_type = path->top_type;
3693         type_t *top_type      = skip_typeref(orig_top_type);
3694
3695         assert(is_type_compound(top_type) || is_type_array(top_type));
3696
3697         ir_initializer_t *initializer = get_initializer_entry(path);
3698
3699         type_path_entry_t *top = append_to_type_path(path);
3700         top->type              = top_type;
3701
3702         size_t len;
3703
3704         if (is_type_compound(top_type)) {
3705                 compound_t *const compound = top_type->compound.compound;
3706                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
3707
3708                 top->compound_entry = entry;
3709                 top->index          = 0;
3710                 len                 = get_compound_member_count(&top_type->compound);
3711                 if (entry != NULL) {
3712                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3713                         path->top_type = entry->declaration.type;
3714                 }
3715         } else {
3716                 assert(is_type_array(top_type));
3717                 assert(top_type->array.size > 0);
3718
3719                 top->index     = 0;
3720                 path->top_type = top_type->array.element_type;
3721                 len            = top_type->array.size;
3722         }
3723         if (initializer == NULL
3724                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3725                 initializer = create_initializer_compound(len);
3726                 /* we have to set the entry at the 2nd latest path entry... */
3727                 size_t path_len = ARR_LEN(path->path);
3728                 assert(path_len >= 1);
3729                 if (path_len > 1) {
3730                         type_path_entry_t *entry        = & path->path[path_len-2];
3731                         ir_initializer_t  *tinitializer = entry->initializer;
3732                         set_initializer_compound_value(tinitializer, entry->index,
3733                                                        initializer);
3734                 }
3735         }
3736         top->initializer = initializer;
3737 }
3738
3739 static void ascend_from_subtype(type_path_t *path)
3740 {
3741         type_path_entry_t *top = get_type_path_top(path);
3742
3743         path->top_type = top->type;
3744
3745         size_t len = ARR_LEN(path->path);
3746         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3747 }
3748
3749 static void walk_designator(type_path_t *path, const designator_t *designator)
3750 {
3751         /* designators start at current object type */
3752         ARR_RESIZE(type_path_entry_t, path->path, 1);
3753
3754         for ( ; designator != NULL; designator = designator->next) {
3755                 type_path_entry_t *top         = get_type_path_top(path);
3756                 type_t            *orig_type   = top->type;
3757                 type_t            *type        = skip_typeref(orig_type);
3758
3759                 if (designator->symbol != NULL) {
3760                         assert(is_type_compound(type));
3761                         size_t    index  = 0;
3762                         symbol_t *symbol = designator->symbol;
3763
3764                         compound_t *compound = type->compound.compound;
3765                         entity_t   *iter     = compound->members.entities;
3766                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3767                                 if (iter->base.symbol == symbol) {
3768                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3769                                         break;
3770                                 }
3771                         }
3772                         assert(iter != NULL);
3773
3774                         /* revert previous initialisations of other union elements */
3775                         if (type->kind == TYPE_COMPOUND_UNION) {
3776                                 ir_initializer_t *initializer = top->initializer;
3777                                 if (initializer != NULL
3778                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3779                                         /* are we writing to a new element? */
3780                                         ir_initializer_t *oldi
3781                                                 = get_initializer_compound_value(initializer, index);
3782                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3783                                                 /* clear initializer */
3784                                                 size_t len
3785                                                         = get_initializer_compound_n_entries(initializer);
3786                                                 ir_initializer_t *nulli = get_initializer_null();
3787                                                 for (size_t i = 0; i < len; ++i) {
3788                                                         set_initializer_compound_value(initializer, i,
3789                                                                                        nulli);
3790                                                 }
3791                                         }
3792                                 }
3793                         }
3794
3795                         top->type           = orig_type;
3796                         top->compound_entry = iter;
3797                         top->index          = index;
3798                         orig_type           = iter->declaration.type;
3799                 } else {
3800                         expression_t *array_index = designator->array_index;
3801                         assert(designator->array_index != NULL);
3802                         assert(is_type_array(type));
3803
3804                         long index = fold_constant_to_int(array_index);
3805                         assert(index >= 0);
3806 #ifndef NDEBUG
3807                         if (type->array.size_constant) {
3808                                 long array_size = type->array.size;
3809                                 assert(index < array_size);
3810                         }
3811 #endif
3812
3813                         top->type  = orig_type;
3814                         top->index = (size_t) index;
3815                         orig_type  = type->array.element_type;
3816                 }
3817                 path->top_type = orig_type;
3818
3819                 if (designator->next != NULL) {
3820                         descend_into_subtype(path);
3821                 }
3822         }
3823
3824         path->invalid  = false;
3825 }
3826
3827 static void advance_current_object(type_path_t *path)
3828 {
3829         if (path->invalid) {
3830                 /* TODO: handle this... */
3831                 panic("invalid initializer in ast2firm (excessive elements)");
3832         }
3833
3834         type_path_entry_t *top = get_type_path_top(path);
3835
3836         type_t *type = skip_typeref(top->type);
3837         if (is_type_union(type)) {
3838                 /* only the first element is initialized in unions */
3839                 top->compound_entry = NULL;
3840         } else if (is_type_struct(type)) {
3841                 entity_t *entry = top->compound_entry;
3842
3843                 top->index++;
3844                 entry               = skip_unnamed_bitfields(entry->base.next);
3845                 top->compound_entry = entry;
3846                 if (entry != NULL) {
3847                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3848                         path->top_type = entry->declaration.type;
3849                         return;
3850                 }
3851         } else {
3852                 assert(is_type_array(type));
3853
3854                 top->index++;
3855                 if (!type->array.size_constant || top->index < type->array.size) {
3856                         return;
3857                 }
3858         }
3859
3860         /* we're past the last member of the current sub-aggregate, try if we
3861          * can ascend in the type hierarchy and continue with another subobject */
3862         size_t len = ARR_LEN(path->path);
3863
3864         if (len > 1) {
3865                 ascend_from_subtype(path);
3866                 advance_current_object(path);
3867         } else {
3868                 path->invalid = true;
3869         }
3870 }
3871
3872
3873 static ir_initializer_t *create_ir_initializer(
3874                 const initializer_t *initializer, type_t *type);
3875
3876 static ir_initializer_t *create_ir_initializer_value(
3877                 const initializer_value_t *initializer)
3878 {
3879         if (is_type_compound(initializer->value->base.type)) {
3880                 panic("initializer creation for compounds not implemented yet");
3881         }
3882         type_t       *type = initializer->value->base.type;
3883         expression_t *expr = initializer->value;
3884         ir_node *value = expression_to_firm(expr);
3885         ir_mode *mode  = get_ir_mode_storage(type);
3886         value          = create_conv(NULL, value, mode);
3887         return create_initializer_const(value);
3888 }
3889
3890 /** test wether type can be initialized by a string constant */
3891 static bool is_string_type(type_t *type)
3892 {
3893         type_t *inner;
3894         if (is_type_pointer(type)) {
3895                 inner = skip_typeref(type->pointer.points_to);
3896         } else if(is_type_array(type)) {
3897                 inner = skip_typeref(type->array.element_type);
3898         } else {
3899                 return false;
3900         }
3901
3902         return is_type_integer(inner);
3903 }
3904
3905 static ir_initializer_t *create_ir_initializer_list(
3906                 const initializer_list_t *initializer, type_t *type)
3907 {
3908         type_path_t path;
3909         memset(&path, 0, sizeof(path));
3910         path.top_type = type;
3911         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3912
3913         descend_into_subtype(&path);
3914
3915         for (size_t i = 0; i < initializer->len; ++i) {
3916                 const initializer_t *sub_initializer = initializer->initializers[i];
3917
3918                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3919                         walk_designator(&path, sub_initializer->designator.designator);
3920                         continue;
3921                 }
3922
3923                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3924                         /* we might have to descend into types until we're at a scalar
3925                          * type */
3926                         while(true) {
3927                                 type_t *orig_top_type = path.top_type;
3928                                 type_t *top_type      = skip_typeref(orig_top_type);
3929
3930                                 if (is_type_scalar(top_type))
3931                                         break;
3932                                 descend_into_subtype(&path);
3933                         }
3934                 } else if (sub_initializer->kind == INITIALIZER_STRING
3935                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3936                         /* we might have to descend into types until we're at a scalar
3937                          * type */
3938                         while (true) {
3939                                 type_t *orig_top_type = path.top_type;
3940                                 type_t *top_type      = skip_typeref(orig_top_type);
3941
3942                                 if (is_string_type(top_type))
3943                                         break;
3944                                 descend_into_subtype(&path);
3945                         }
3946                 }
3947
3948                 ir_initializer_t *sub_irinitializer
3949                         = create_ir_initializer(sub_initializer, path.top_type);
3950
3951                 size_t path_len = ARR_LEN(path.path);
3952                 assert(path_len >= 1);
3953                 type_path_entry_t *entry        = & path.path[path_len-1];
3954                 ir_initializer_t  *tinitializer = entry->initializer;
3955                 set_initializer_compound_value(tinitializer, entry->index,
3956                                                sub_irinitializer);
3957
3958                 advance_current_object(&path);
3959         }
3960
3961         assert(ARR_LEN(path.path) >= 1);
3962         ir_initializer_t *result = path.path[0].initializer;
3963         DEL_ARR_F(path.path);
3964
3965         return result;
3966 }
3967
3968 static ir_initializer_t *create_ir_initializer_string(
3969                 const initializer_string_t *initializer, type_t *type)
3970 {
3971         type = skip_typeref(type);
3972
3973         size_t            string_len    = initializer->string.size;
3974         assert(type->kind == TYPE_ARRAY);
3975         assert(type->array.size_constant);
3976         size_t            len           = type->array.size;
3977         ir_initializer_t *irinitializer = create_initializer_compound(len);
3978
3979         const char *string = initializer->string.begin;
3980         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3981
3982         for (size_t i = 0; i < len; ++i) {
3983                 char c = 0;
3984                 if (i < string_len)
3985                         c = string[i];
3986
3987                 ir_tarval        *tv = new_tarval_from_long(c, mode);
3988                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3989
3990                 set_initializer_compound_value(irinitializer, i, char_initializer);
3991         }
3992
3993         return irinitializer;
3994 }
3995
3996 static ir_initializer_t *create_ir_initializer_wide_string(
3997                 const initializer_wide_string_t *initializer, type_t *type)
3998 {
3999         assert(type->kind == TYPE_ARRAY);
4000         assert(type->array.size_constant);
4001         size_t            len           = type->array.size;
4002         size_t            string_len    = wstrlen(&initializer->string);
4003         ir_initializer_t *irinitializer = create_initializer_compound(len);
4004
4005         const char *p    = initializer->string.begin;
4006         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4007
4008         for (size_t i = 0; i < len; ++i) {
4009                 utf32 c = 0;
4010                 if (i < string_len) {
4011                         c = read_utf8_char(&p);
4012                 }
4013                 ir_tarval *tv = new_tarval_from_long(c, mode);
4014                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4015
4016                 set_initializer_compound_value(irinitializer, i, char_initializer);
4017         }
4018
4019         return irinitializer;
4020 }
4021
4022 static ir_initializer_t *create_ir_initializer(
4023                 const initializer_t *initializer, type_t *type)
4024 {
4025         switch(initializer->kind) {
4026                 case INITIALIZER_STRING:
4027                         return create_ir_initializer_string(&initializer->string, type);
4028
4029                 case INITIALIZER_WIDE_STRING:
4030                         return create_ir_initializer_wide_string(&initializer->wide_string,
4031                                                                  type);
4032
4033                 case INITIALIZER_LIST:
4034                         return create_ir_initializer_list(&initializer->list, type);
4035
4036                 case INITIALIZER_VALUE:
4037                         return create_ir_initializer_value(&initializer->value);
4038
4039                 case INITIALIZER_DESIGNATOR:
4040                         panic("unexpected designator initializer found");
4041         }
4042         panic("unknown initializer");
4043 }
4044
4045 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4046  *  are elements [...] the remainder of the aggregate shall be initialized
4047  *  implicitly the same as objects that have static storage duration. */
4048 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4049                 ir_node *base_addr)
4050 {
4051         /* for unions we must NOT do anything for null initializers */
4052         ir_type *owner = get_entity_owner(entity);
4053         if (is_Union_type(owner)) {
4054                 return;
4055         }
4056
4057         ir_type *ent_type = get_entity_type(entity);
4058         /* create sub-initializers for a compound type */
4059         if (is_compound_type(ent_type)) {
4060                 unsigned n_members = get_compound_n_members(ent_type);
4061                 for (unsigned n = 0; n < n_members; ++n) {
4062                         ir_entity *member = get_compound_member(ent_type, n);
4063                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4064                                                                 member);
4065                         create_dynamic_null_initializer(member, dbgi, addr);
4066                 }
4067                 return;
4068         }
4069         if (is_Array_type(ent_type)) {
4070                 assert(has_array_upper_bound(ent_type, 0));
4071                 long n = get_array_upper_bound_int(ent_type, 0);
4072                 for (long i = 0; i < n; ++i) {
4073                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4074                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4075                         ir_node   *in[1]    = { cnst };
4076                         ir_entity *arrent   = get_array_element_entity(ent_type);
4077                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4078                                                         arrent);
4079                         create_dynamic_null_initializer(arrent, dbgi, addr);
4080                 }
4081                 return;
4082         }
4083
4084         ir_mode *value_mode = get_type_mode(ent_type);
4085         ir_node *node       = new_Const(get_mode_null(value_mode));
4086
4087         /* is it a bitfield type? */
4088         if (is_Primitive_type(ent_type) &&
4089                         get_primitive_base_type(ent_type) != NULL) {
4090                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4091                 return;
4092         }
4093
4094         ir_node *mem    = get_store();
4095         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4096         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4097         set_store(proj_m);
4098 }
4099
4100 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4101                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4102 {
4103         switch(get_initializer_kind(initializer)) {
4104         case IR_INITIALIZER_NULL:
4105                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4106                 return;
4107         case IR_INITIALIZER_CONST: {
4108                 ir_node *node     = get_initializer_const_value(initializer);
4109                 ir_type *ent_type = get_entity_type(entity);
4110
4111                 /* is it a bitfield type? */
4112                 if (is_Primitive_type(ent_type) &&
4113                                 get_primitive_base_type(ent_type) != NULL) {
4114                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4115                         return;
4116                 }
4117
4118                 assert(get_type_mode(type) == get_irn_mode(node));
4119                 ir_node *mem    = get_store();
4120                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4121                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4122                 set_store(proj_m);
4123                 return;
4124         }
4125         case IR_INITIALIZER_TARVAL: {
4126                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4127                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4128                 ir_type   *ent_type = get_entity_type(entity);
4129
4130                 /* is it a bitfield type? */
4131                 if (is_Primitive_type(ent_type) &&
4132                                 get_primitive_base_type(ent_type) != NULL) {
4133                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4134                         return;
4135                 }
4136
4137                 assert(get_type_mode(type) == get_tarval_mode(tv));
4138                 ir_node *mem    = get_store();
4139                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4140                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4141                 set_store(proj_m);
4142                 return;
4143         }
4144         case IR_INITIALIZER_COMPOUND: {
4145                 assert(is_compound_type(type) || is_Array_type(type));
4146                 int n_members;
4147                 if (is_Array_type(type)) {
4148                         assert(has_array_upper_bound(type, 0));
4149                         n_members = get_array_upper_bound_int(type, 0);
4150                 } else {
4151                         n_members = get_compound_n_members(type);
4152                 }
4153
4154                 if (get_initializer_compound_n_entries(initializer)
4155                                 != (unsigned) n_members)
4156                         panic("initializer doesn't match compound type");
4157
4158                 for (int i = 0; i < n_members; ++i) {
4159                         ir_node   *addr;
4160                         ir_type   *irtype;
4161                         ir_entity *sub_entity;
4162                         if (is_Array_type(type)) {
4163                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4164                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4165                                 ir_node   *in[1]    = { cnst };
4166                                 irtype     = get_array_element_type(type);
4167                                 sub_entity = get_array_element_entity(type);
4168                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4169                                                        sub_entity);
4170                         } else {
4171                                 sub_entity = get_compound_member(type, i);
4172                                 irtype     = get_entity_type(sub_entity);
4173                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4174                                                              sub_entity);
4175                         }
4176
4177                         ir_initializer_t *sub_init
4178                                 = get_initializer_compound_value(initializer, i);
4179
4180                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4181                                                        addr);
4182                 }
4183                 return;
4184         }
4185         }
4186
4187         panic("invalid IR_INITIALIZER found");
4188 }
4189
4190 static void create_dynamic_initializer(ir_initializer_t *initializer,
4191                 dbg_info *dbgi, ir_entity *entity)
4192 {
4193         ir_node *frame     = get_irg_frame(current_ir_graph);
4194         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4195         ir_type *type      = get_entity_type(entity);
4196
4197         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4198 }
4199
4200 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4201                                      ir_entity *entity, type_t *type)
4202 {
4203         ir_node *memory = get_store();
4204         ir_node *nomem  = new_NoMem();
4205         ir_node *frame  = get_irg_frame(current_ir_graph);
4206         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4207
4208         if (initializer->kind == INITIALIZER_VALUE) {
4209                 initializer_value_t *initializer_value = &initializer->value;
4210
4211                 ir_node *value = expression_to_firm(initializer_value->value);
4212                 type = skip_typeref(type);
4213                 assign_value(dbgi, addr, type, value);
4214                 return;
4215         }
4216
4217         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4218                 ir_initializer_t *irinitializer
4219                         = create_ir_initializer(initializer, type);
4220
4221                 create_dynamic_initializer(irinitializer, dbgi, entity);
4222                 return;
4223         }
4224
4225         /* create the ir_initializer */
4226         ir_graph *const old_current_ir_graph = current_ir_graph;
4227         current_ir_graph = get_const_code_irg();
4228
4229         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4230
4231         assert(current_ir_graph == get_const_code_irg());
4232         current_ir_graph = old_current_ir_graph;
4233
4234         /* create a "template" entity which is copied to the entity on the stack */
4235         ident     *const id          = id_unique("initializer.%u");
4236         ir_type   *const irtype      = get_ir_type(type);
4237         ir_type   *const global_type = get_glob_type();
4238         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4239         set_entity_ld_ident(init_entity, id);
4240
4241         set_entity_visibility(init_entity, ir_visibility_private);
4242         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4243
4244         set_entity_initializer(init_entity, irinitializer);
4245
4246         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4247         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4248
4249         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4250         set_store(copyb_mem);
4251 }
4252
4253 static void create_initializer_local_variable_entity(entity_t *entity)
4254 {
4255         assert(entity->kind == ENTITY_VARIABLE);
4256         initializer_t *initializer = entity->variable.initializer;
4257         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4258         ir_entity     *irentity    = entity->variable.v.entity;
4259         type_t        *type        = entity->declaration.type;
4260
4261         create_local_initializer(initializer, dbgi, irentity, type);
4262 }
4263
4264 static void create_variable_initializer(entity_t *entity)
4265 {
4266         assert(entity->kind == ENTITY_VARIABLE);
4267         initializer_t *initializer = entity->variable.initializer;
4268         if (initializer == NULL)
4269                 return;
4270
4271         declaration_kind_t declaration_kind
4272                 = (declaration_kind_t) entity->declaration.kind;
4273         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4274                 create_initializer_local_variable_entity(entity);
4275                 return;
4276         }
4277
4278         type_t            *type = entity->declaration.type;
4279         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4280
4281         if (initializer->kind == INITIALIZER_VALUE) {
4282                 initializer_value_t *initializer_value = &initializer->value;
4283                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4284
4285                 ir_node *value = expression_to_firm(initializer_value->value);
4286
4287                 type_t  *init_type = initializer_value->value->base.type;
4288                 ir_mode *mode      = get_ir_mode_storage(init_type);
4289                 value = create_conv(dbgi, value, mode);
4290                 value = do_strict_conv(dbgi, value);
4291
4292                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4293                         set_value(entity->variable.v.value_number, value);
4294                 } else {
4295                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4296
4297                         ir_entity *irentity = entity->variable.v.entity;
4298
4299                         if (tq & TYPE_QUALIFIER_CONST
4300                                         && get_entity_owner(irentity) != get_tls_type()) {
4301                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4302                         }
4303                         set_atomic_ent_value(irentity, value);
4304                 }
4305         } else {
4306                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4307                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4308
4309                 ir_entity        *irentity        = entity->variable.v.entity;
4310                 ir_initializer_t *irinitializer
4311                         = create_ir_initializer(initializer, type);
4312
4313                 if (tq & TYPE_QUALIFIER_CONST) {
4314                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4315                 }
4316                 set_entity_initializer(irentity, irinitializer);
4317         }
4318 }
4319
4320 static void create_variable_length_array(entity_t *entity)
4321 {
4322         assert(entity->kind == ENTITY_VARIABLE);
4323         assert(entity->variable.initializer == NULL);
4324
4325         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4326         entity->variable.v.vla_base = NULL;
4327
4328         /* TODO: record VLA somewhere so we create the free node when we leave
4329          * it's scope */
4330 }
4331
4332 static void allocate_variable_length_array(entity_t *entity)
4333 {
4334         assert(entity->kind == ENTITY_VARIABLE);
4335         assert(entity->variable.initializer == NULL);
4336         assert(currently_reachable());
4337
4338         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4339         type_t   *type      = entity->declaration.type;
4340         ir_type  *el_type   = get_ir_type(type->array.element_type);
4341
4342         /* make sure size_node is calculated */
4343         get_type_size_node(type);
4344         ir_node  *elems = type->array.size_node;
4345         ir_node  *mem   = get_store();
4346         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4347
4348         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4349         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4350         set_store(proj_m);
4351
4352         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4353         entity->variable.v.vla_base = addr;
4354 }
4355
4356 /**
4357  * Creates a Firm local variable from a declaration.
4358  */
4359 static void create_local_variable(entity_t *entity)
4360 {
4361         assert(entity->kind == ENTITY_VARIABLE);
4362         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4363
4364         bool needs_entity = entity->variable.address_taken;
4365         type_t *type = skip_typeref(entity->declaration.type);
4366
4367         /* is it a variable length array? */
4368         if (is_type_array(type) && !type->array.size_constant) {
4369                 create_variable_length_array(entity);
4370                 return;
4371         } else if (is_type_array(type) || is_type_compound(type)) {
4372                 needs_entity = true;
4373         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4374                 needs_entity = true;
4375         }
4376
4377         if (needs_entity) {
4378                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4379                 create_variable_entity(entity,
4380                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4381                                        frame_type);
4382         } else {
4383                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4384                 entity->variable.v.value_number = next_value_number_function;
4385                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4386                                         entity);
4387                 ++next_value_number_function;
4388         }
4389 }
4390
4391 static void create_local_static_variable(entity_t *entity)
4392 {
4393         assert(entity->kind == ENTITY_VARIABLE);
4394         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4395
4396         type_t   *type           = skip_typeref(entity->declaration.type);
4397         ir_type  *const var_type = entity->variable.thread_local ?
4398                 get_tls_type() : get_glob_type();
4399         ir_type  *const irtype   = get_ir_type(type);
4400         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4401
4402         size_t l = strlen(entity->base.symbol->string);
4403         char   buf[l + sizeof(".%u")];
4404         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4405         ident     *const id       = id_unique(buf);
4406         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4407
4408         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4409                 set_entity_volatility(irentity, volatility_is_volatile);
4410         }
4411
4412         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4413         entity->variable.v.entity = irentity;
4414
4415         set_entity_ld_ident(irentity, id);
4416         set_entity_visibility(irentity, ir_visibility_local);
4417
4418         ir_graph *const old_current_ir_graph = current_ir_graph;
4419         current_ir_graph = get_const_code_irg();
4420
4421         create_variable_initializer(entity);
4422
4423         assert(current_ir_graph == get_const_code_irg());
4424         current_ir_graph = old_current_ir_graph;
4425 }
4426
4427
4428
4429 static void return_statement_to_firm(return_statement_t *statement)
4430 {
4431         if (!currently_reachable())
4432                 return;
4433
4434         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4435         type_t   *type        = current_function_entity->declaration.type;
4436         ir_type  *func_irtype = get_ir_type(type);
4437
4438         ir_node *in[1];
4439         int      in_len;
4440         if (get_method_n_ress(func_irtype) > 0) {
4441                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4442
4443                 if (statement->value != NULL) {
4444                         ir_node *node = expression_to_firm(statement->value);
4445                         if (!is_compound_type(res_type)) {
4446                                 type_t  *ret_value_type = statement->value->base.type;
4447                                 ir_mode *mode           = get_ir_mode_storage(ret_value_type);
4448                                 node                    = create_conv(dbgi, node, mode);
4449                                 node                    = do_strict_conv(dbgi, node);
4450                         }
4451                         in[0] = node;
4452                 } else {
4453                         ir_mode *mode;
4454                         if (is_compound_type(res_type)) {
4455                                 mode = mode_P_data;
4456                         } else {
4457                                 mode = get_type_mode(res_type);
4458                         }
4459                         in[0] = new_Unknown(mode);
4460                 }
4461                 in_len = 1;
4462         } else {
4463                 /* build return_value for its side effects */
4464                 if (statement->value != NULL) {
4465                         expression_to_firm(statement->value);
4466                 }
4467                 in_len = 0;
4468         }
4469
4470         ir_node  *store = get_store();
4471         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4472
4473         ir_node *end_block = get_irg_end_block(current_ir_graph);
4474         add_immBlock_pred(end_block, ret);
4475
4476         set_unreachable_now();
4477 }
4478
4479 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4480 {
4481         if (!currently_reachable())
4482                 return NULL;
4483
4484         return expression_to_firm(statement->expression);
4485 }
4486
4487 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4488 {
4489         entity_t *entity = compound->scope.entities;
4490         for ( ; entity != NULL; entity = entity->base.next) {
4491                 if (!is_declaration(entity))
4492                         continue;
4493
4494                 create_local_declaration(entity);
4495         }
4496
4497         ir_node     *result    = NULL;
4498         statement_t *statement = compound->statements;
4499         for ( ; statement != NULL; statement = statement->base.next) {
4500                 if (statement->base.next == NULL
4501                                 && statement->kind == STATEMENT_EXPRESSION) {
4502                         result = expression_statement_to_firm(
4503                                         &statement->expression);
4504                         break;
4505                 }
4506                 statement_to_firm(statement);
4507         }
4508
4509         return result;
4510 }
4511
4512 static void create_global_variable(entity_t *entity)
4513 {
4514         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4515         ir_visibility visibility = ir_visibility_default;
4516         ir_entity    *irentity;
4517         assert(entity->kind == ENTITY_VARIABLE);
4518
4519         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4520         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4521         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4522         case STORAGE_CLASS_NONE:
4523                 visibility = ir_visibility_default;
4524                 /* uninitialized globals get merged in C */
4525                 if (entity->variable.initializer == NULL)
4526                         linkage |= IR_LINKAGE_MERGE;
4527                 break;
4528         case STORAGE_CLASS_TYPEDEF:
4529         case STORAGE_CLASS_AUTO:
4530         case STORAGE_CLASS_REGISTER:
4531                 panic("invalid storage class for global var");
4532         }
4533
4534         ir_type *var_type = get_glob_type();
4535         if (entity->variable.thread_local) {
4536                 var_type = get_tls_type();
4537                 /* LINKAGE_MERGE not supported by current linkers */
4538                 linkage &= ~IR_LINKAGE_MERGE;
4539         }
4540         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4541         irentity = entity->variable.v.entity;
4542         add_entity_linkage(irentity, linkage);
4543         set_entity_visibility(irentity, visibility);
4544 }
4545
4546 static void create_local_declaration(entity_t *entity)
4547 {
4548         assert(is_declaration(entity));
4549
4550         /* construct type */
4551         (void) get_ir_type(entity->declaration.type);
4552         if (entity->base.symbol == NULL) {
4553                 return;
4554         }
4555
4556         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4557         case STORAGE_CLASS_STATIC:
4558                 if (entity->kind == ENTITY_FUNCTION) {
4559                         (void)get_function_entity(entity, NULL);
4560                 } else {
4561                         create_local_static_variable(entity);
4562                 }
4563                 return;
4564         case STORAGE_CLASS_EXTERN:
4565                 if (entity->kind == ENTITY_FUNCTION) {
4566                         assert(entity->function.statement == NULL);
4567                         (void)get_function_entity(entity, NULL);
4568                 } else {
4569                         create_global_variable(entity);
4570                         create_variable_initializer(entity);
4571                 }
4572                 return;
4573         case STORAGE_CLASS_NONE:
4574         case STORAGE_CLASS_AUTO:
4575         case STORAGE_CLASS_REGISTER:
4576                 if (entity->kind == ENTITY_FUNCTION) {
4577                         if (entity->function.statement != NULL) {
4578                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4579                                 (void)get_function_entity(entity, owner);
4580                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4581                                 enqueue_inner_function(entity);
4582                         } else {
4583                                 (void)get_function_entity(entity, NULL);
4584                         }
4585                 } else {
4586                         create_local_variable(entity);
4587                 }
4588                 return;
4589         case STORAGE_CLASS_TYPEDEF:
4590                 break;
4591         }
4592         panic("invalid storage class found");
4593 }
4594
4595 static void initialize_local_declaration(entity_t *entity)
4596 {
4597         if (entity->base.symbol == NULL)
4598                 return;
4599
4600         // no need to emit code in dead blocks
4601         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4602                         && !currently_reachable())
4603                 return;
4604
4605         switch ((declaration_kind_t) entity->declaration.kind) {
4606         case DECLARATION_KIND_LOCAL_VARIABLE:
4607         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4608                 create_variable_initializer(entity);
4609                 return;
4610
4611         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4612                 allocate_variable_length_array(entity);
4613                 return;
4614
4615         case DECLARATION_KIND_COMPOUND_MEMBER:
4616         case DECLARATION_KIND_GLOBAL_VARIABLE:
4617         case DECLARATION_KIND_FUNCTION:
4618         case DECLARATION_KIND_INNER_FUNCTION:
4619                 return;
4620
4621         case DECLARATION_KIND_PARAMETER:
4622         case DECLARATION_KIND_PARAMETER_ENTITY:
4623                 panic("can't initialize parameters");
4624
4625         case DECLARATION_KIND_UNKNOWN:
4626                 panic("can't initialize unknown declaration");
4627         }
4628         panic("invalid declaration kind");
4629 }
4630
4631 static void declaration_statement_to_firm(declaration_statement_t *statement)
4632 {
4633         entity_t *entity = statement->declarations_begin;
4634         if (entity == NULL)
4635                 return;
4636
4637         entity_t *const last = statement->declarations_end;
4638         for ( ;; entity = entity->base.next) {
4639                 if (is_declaration(entity)) {
4640                         initialize_local_declaration(entity);
4641                 } else if (entity->kind == ENTITY_TYPEDEF) {
4642                         /* §6.7.7:3  Any array size expressions associated with variable length
4643                          * array declarators are evaluated each time the declaration of the
4644                          * typedef name is reached in the order of execution. */
4645                         type_t *const type = skip_typeref(entity->typedefe.type);
4646                         if (is_type_array(type) && type->array.is_vla)
4647                                 get_vla_size(&type->array);
4648                 }
4649                 if (entity == last)
4650                         break;
4651         }
4652 }
4653
4654 static void if_statement_to_firm(if_statement_t *statement)
4655 {
4656         /* Create the condition. */
4657         ir_node *true_block  = NULL;
4658         ir_node *false_block = NULL;
4659         if (currently_reachable()) {
4660                 true_block  = new_immBlock();
4661                 false_block = new_immBlock();
4662                 create_condition_evaluation(statement->condition, true_block, false_block);
4663                 mature_immBlock(true_block);
4664         }
4665
4666         /* Create the false statement.
4667          * Handle false before true, so if no false statement is present, then the
4668          * empty false block is reused as fallthrough block. */
4669         ir_node *fallthrough_block = NULL;
4670         if (statement->false_statement != NULL) {
4671                 if (false_block != NULL) {
4672                         mature_immBlock(false_block);
4673                 }
4674                 set_cur_block(false_block);
4675                 statement_to_firm(statement->false_statement);
4676                 if (currently_reachable()) {
4677                         fallthrough_block = new_immBlock();
4678                         add_immBlock_pred(fallthrough_block, new_Jmp());
4679                 }
4680         } else {
4681                 fallthrough_block = false_block;
4682         }
4683
4684         /* Create the true statement. */
4685         set_cur_block(true_block);
4686         statement_to_firm(statement->true_statement);
4687         if (currently_reachable()) {
4688                 if (fallthrough_block == NULL) {
4689                         fallthrough_block = new_immBlock();
4690                 }
4691                 add_immBlock_pred(fallthrough_block, new_Jmp());
4692         }
4693
4694         /* Handle the block after the if-statement. */
4695         if (fallthrough_block != NULL) {
4696                 mature_immBlock(fallthrough_block);
4697         }
4698         set_cur_block(fallthrough_block);
4699 }
4700
4701 /* Create a jump node which jumps into target_block, if the current block is
4702  * reachable. */
4703 static void jump_if_reachable(ir_node *const target_block)
4704 {
4705         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4706         add_immBlock_pred(target_block, pred);
4707 }
4708
4709 static void while_statement_to_firm(while_statement_t *statement)
4710 {
4711         /* Create the header block */
4712         ir_node *const header_block = new_immBlock();
4713         jump_if_reachable(header_block);
4714
4715         /* Create the condition. */
4716         ir_node      *      body_block;
4717         ir_node      *      false_block;
4718         expression_t *const cond = statement->condition;
4719         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4720                         fold_constant_to_bool(cond)) {
4721                 /* Shortcut for while (true). */
4722                 body_block  = header_block;
4723                 false_block = NULL;
4724
4725                 keep_alive(header_block);
4726                 keep_all_memory(header_block);
4727         } else {
4728                 body_block  = new_immBlock();
4729                 false_block = new_immBlock();
4730
4731                 set_cur_block(header_block);
4732                 create_condition_evaluation(cond, body_block, false_block);
4733                 mature_immBlock(body_block);
4734         }
4735
4736         ir_node *const old_continue_label = continue_label;
4737         ir_node *const old_break_label    = break_label;
4738         continue_label = header_block;
4739         break_label    = false_block;
4740
4741         /* Create the loop body. */
4742         set_cur_block(body_block);
4743         statement_to_firm(statement->body);
4744         jump_if_reachable(header_block);
4745
4746         mature_immBlock(header_block);
4747         assert(false_block == NULL || false_block == break_label);
4748         false_block = break_label;
4749         if (false_block != NULL) {
4750                 mature_immBlock(false_block);
4751         }
4752         set_cur_block(false_block);
4753
4754         assert(continue_label == header_block);
4755         continue_label = old_continue_label;
4756         break_label    = old_break_label;
4757 }
4758
4759 static ir_node *get_break_label(void)
4760 {
4761         if (break_label == NULL) {
4762                 break_label = new_immBlock();
4763         }
4764         return break_label;
4765 }
4766
4767 static void do_while_statement_to_firm(do_while_statement_t *statement)
4768 {
4769         /* create the header block */
4770         ir_node *header_block = new_immBlock();
4771
4772         /* the loop body */
4773         ir_node *body_block = new_immBlock();
4774         jump_if_reachable(body_block);
4775
4776         ir_node *old_continue_label = continue_label;
4777         ir_node *old_break_label    = break_label;
4778         continue_label              = header_block;
4779         break_label                 = NULL;
4780
4781         set_cur_block(body_block);
4782         statement_to_firm(statement->body);
4783         ir_node *const false_block = get_break_label();
4784
4785         assert(continue_label == header_block);
4786         continue_label = old_continue_label;
4787         break_label    = old_break_label;
4788
4789         jump_if_reachable(header_block);
4790
4791         /* create the condition */
4792         mature_immBlock(header_block);
4793         set_cur_block(header_block);
4794
4795         create_condition_evaluation(statement->condition, body_block, false_block);
4796         mature_immBlock(body_block);
4797         mature_immBlock(false_block);
4798
4799         set_cur_block(false_block);
4800 }
4801
4802 static void for_statement_to_firm(for_statement_t *statement)
4803 {
4804         /* create declarations */
4805         entity_t *entity = statement->scope.entities;
4806         for ( ; entity != NULL; entity = entity->base.next) {
4807                 if (!is_declaration(entity))
4808                         continue;
4809
4810                 create_local_declaration(entity);
4811         }
4812
4813         if (currently_reachable()) {
4814                 entity = statement->scope.entities;
4815                 for ( ; entity != NULL; entity = entity->base.next) {
4816                         if (!is_declaration(entity))
4817                                 continue;
4818
4819                         initialize_local_declaration(entity);
4820                 }
4821
4822                 if (statement->initialisation != NULL) {
4823                         expression_to_firm(statement->initialisation);
4824                 }
4825         }
4826
4827         /* Create the header block */
4828         ir_node *const header_block = new_immBlock();
4829         jump_if_reachable(header_block);
4830
4831         /* Create the condition. */
4832         ir_node *body_block;
4833         ir_node *false_block;
4834         if (statement->condition != NULL) {
4835                 body_block  = new_immBlock();
4836                 false_block = new_immBlock();
4837
4838                 set_cur_block(header_block);
4839                 create_condition_evaluation(statement->condition, body_block, false_block);
4840                 mature_immBlock(body_block);
4841         } else {
4842                 /* for-ever. */
4843                 body_block  = header_block;
4844                 false_block = NULL;
4845
4846                 keep_alive(header_block);
4847                 keep_all_memory(header_block);
4848         }
4849
4850         /* Create the step block, if necessary. */
4851         ir_node      *      step_block = header_block;
4852         expression_t *const step       = statement->step;
4853         if (step != NULL) {
4854                 step_block = new_immBlock();
4855         }
4856
4857         ir_node *const old_continue_label = continue_label;
4858         ir_node *const old_break_label    = break_label;
4859         continue_label = step_block;
4860         break_label    = false_block;
4861
4862         /* Create the loop body. */
4863         set_cur_block(body_block);
4864         statement_to_firm(statement->body);
4865         jump_if_reachable(step_block);
4866
4867         /* Create the step code. */
4868         if (step != NULL) {
4869                 mature_immBlock(step_block);
4870                 set_cur_block(step_block);
4871                 expression_to_firm(step);
4872                 jump_if_reachable(header_block);
4873         }
4874
4875         mature_immBlock(header_block);
4876         assert(false_block == NULL || false_block == break_label);
4877         false_block = break_label;
4878         if (false_block != NULL) {
4879                 mature_immBlock(false_block);
4880         }
4881         set_cur_block(false_block);
4882
4883         assert(continue_label == step_block);
4884         continue_label = old_continue_label;
4885         break_label    = old_break_label;
4886 }
4887
4888 static void create_jump_statement(const statement_t *statement,
4889                                   ir_node *target_block)
4890 {
4891         if (!currently_reachable())
4892                 return;
4893
4894         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4895         ir_node  *jump = new_d_Jmp(dbgi);
4896         add_immBlock_pred(target_block, jump);
4897
4898         set_unreachable_now();
4899 }
4900
4901 static void switch_statement_to_firm(switch_statement_t *statement)
4902 {
4903         ir_node  *first_block = NULL;
4904         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4905         ir_node  *cond        = NULL;
4906
4907         if (currently_reachable()) {
4908                 ir_node *expression = expression_to_firm(statement->expression);
4909                 cond                = new_d_Cond(dbgi, expression);
4910                 first_block         = get_cur_block();
4911         }
4912
4913         set_unreachable_now();
4914
4915         ir_node *const old_switch_cond       = current_switch_cond;
4916         ir_node *const old_break_label       = break_label;
4917         const bool     old_saw_default_label = saw_default_label;
4918         saw_default_label                    = false;
4919         current_switch_cond                  = cond;
4920         break_label                          = NULL;
4921         switch_statement_t *const old_switch = current_switch;
4922         current_switch                       = statement;
4923
4924         /* determine a free number for the default label */
4925         unsigned long num_cases       = 0;
4926         long          default_proj_nr = 0;
4927         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4928                 if (l->expression == NULL) {
4929                         /* default case */
4930                         continue;
4931                 }
4932                 if (l->last_case >= l->first_case)
4933                         num_cases += l->last_case - l->first_case + 1;
4934                 if (l->last_case > default_proj_nr)
4935                         default_proj_nr = l->last_case;
4936         }
4937
4938         if (default_proj_nr == LONG_MAX) {
4939                 /* Bad: an overflow will occur, we cannot be sure that the
4940                  * maximum + 1 is a free number. Scan the values a second
4941                  * time to find a free number.
4942                  */
4943                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4944
4945                 memset(bits, 0, (num_cases + 7) >> 3);
4946                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4947                         if (l->expression == NULL) {
4948                                 /* default case */
4949                                 continue;
4950                         }
4951                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4952                         if (start < num_cases && l->last_case >= 0) {
4953                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4954                                         (unsigned long)l->last_case : num_cases - 1;
4955                                 for (unsigned long cns = start; cns <= end; ++cns) {
4956                                         bits[cns >> 3] |= (1 << (cns & 7));
4957                                 }
4958                         }
4959                 }
4960                 /* We look at the first num_cases constants:
4961                  * Either they are dense, so we took the last (num_cases)
4962                  * one, or they are not dense, so we will find one free
4963                  * there...
4964                  */
4965                 unsigned long i;
4966                 for (i = 0; i < num_cases; ++i)
4967                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4968                                 break;
4969
4970                 free(bits);
4971                 default_proj_nr = i;
4972         } else {
4973                 ++default_proj_nr;
4974         }
4975         statement->default_proj_nr = default_proj_nr;
4976         /* safety check: cond might already be folded to a Bad */
4977         if (cond != NULL && is_Cond(cond)) {
4978                 set_Cond_default_proj(cond, default_proj_nr);
4979         }
4980
4981         statement_to_firm(statement->body);
4982
4983         jump_if_reachable(get_break_label());
4984
4985         if (!saw_default_label && first_block != NULL) {
4986                 set_cur_block(first_block);
4987                 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
4988                 add_immBlock_pred(get_break_label(), proj);
4989         }
4990
4991         if (break_label != NULL) {
4992                 mature_immBlock(break_label);
4993         }
4994         set_cur_block(break_label);
4995
4996         assert(current_switch_cond == cond);
4997         current_switch      = old_switch;
4998         current_switch_cond = old_switch_cond;
4999         break_label         = old_break_label;
5000         saw_default_label   = old_saw_default_label;
5001 }
5002
5003 static void case_label_to_firm(const case_label_statement_t *statement)
5004 {
5005         if (statement->is_empty_range)
5006                 return;
5007
5008         ir_node *block = new_immBlock();
5009         /* Fallthrough from previous case */
5010         jump_if_reachable(block);
5011
5012         if (current_switch_cond != NULL) {
5013                 set_cur_block(get_nodes_block(current_switch_cond));
5014                 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5015                 if (statement->expression != NULL) {
5016                         long pn     = statement->first_case;
5017                         long end_pn = statement->last_case;
5018                         assert(pn <= end_pn);
5019                         /* create jumps for all cases in the given range */
5020                         do {
5021                                 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5022                                 add_immBlock_pred(block, proj);
5023                         } while (pn++ < end_pn);
5024                 } else {
5025                         saw_default_label = true;
5026                         ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5027                                                          current_switch->default_proj_nr);
5028                         add_immBlock_pred(block, proj);
5029                 }
5030         }
5031
5032         mature_immBlock(block);
5033         set_cur_block(block);
5034
5035         statement_to_firm(statement->statement);
5036 }
5037
5038 static void label_to_firm(const label_statement_t *statement)
5039 {
5040         ir_node *block = get_label_block(statement->label);
5041         jump_if_reachable(block);
5042
5043         set_cur_block(block);
5044         keep_alive(block);
5045         keep_all_memory(block);
5046
5047         statement_to_firm(statement->statement);
5048 }
5049
5050 static void goto_to_firm(const goto_statement_t *statement)
5051 {
5052         if (!currently_reachable())
5053                 return;
5054
5055         if (statement->expression) {
5056                 ir_node  *irn  = expression_to_firm(statement->expression);
5057                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5058                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5059
5060                 set_irn_link(ijmp, ijmp_list);
5061                 ijmp_list = ijmp;
5062         } else {
5063                 ir_node *block = get_label_block(statement->label);
5064                 ir_node *jmp   = new_Jmp();
5065                 add_immBlock_pred(block, jmp);
5066         }
5067         set_unreachable_now();
5068 }
5069
5070 static void asm_statement_to_firm(const asm_statement_t *statement)
5071 {
5072         bool needs_memory = false;
5073
5074         if (statement->is_volatile) {
5075                 needs_memory = true;
5076         }
5077
5078         size_t         n_clobbers = 0;
5079         asm_clobber_t *clobber    = statement->clobbers;
5080         for ( ; clobber != NULL; clobber = clobber->next) {
5081                 const char *clobber_str = clobber->clobber.begin;
5082
5083                 if (!be_is_valid_clobber(clobber_str)) {
5084                         errorf(&statement->base.source_position,
5085                                    "invalid clobber '%s' specified", clobber->clobber);
5086                         continue;
5087                 }
5088
5089                 if (streq(clobber_str, "memory")) {
5090                         needs_memory = true;
5091                         continue;
5092                 }
5093
5094                 ident *id = new_id_from_str(clobber_str);
5095                 obstack_ptr_grow(&asm_obst, id);
5096                 ++n_clobbers;
5097         }
5098         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5099         ident **clobbers = NULL;
5100         if (n_clobbers > 0) {
5101                 clobbers = obstack_finish(&asm_obst);
5102         }
5103
5104         size_t n_inputs  = 0;
5105         asm_argument_t *argument = statement->inputs;
5106         for ( ; argument != NULL; argument = argument->next)
5107                 n_inputs++;
5108         size_t n_outputs = 0;
5109         argument = statement->outputs;
5110         for ( ; argument != NULL; argument = argument->next)
5111                 n_outputs++;
5112
5113         unsigned next_pos = 0;
5114
5115         ir_node *ins[n_inputs + n_outputs + 1];
5116         size_t   in_size = 0;
5117
5118         ir_asm_constraint tmp_in_constraints[n_outputs];
5119
5120         const expression_t *out_exprs[n_outputs];
5121         ir_node            *out_addrs[n_outputs];
5122         size_t              out_size = 0;
5123
5124         argument = statement->outputs;
5125         for ( ; argument != NULL; argument = argument->next) {
5126                 const char *constraints = argument->constraints.begin;
5127                 asm_constraint_flags_t asm_flags
5128                         = be_parse_asm_constraints(constraints);
5129
5130                 {
5131                         source_position_t const *const pos = &statement->base.source_position;
5132                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5133                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5134                         }
5135                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5136                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5137                                 continue;
5138                         }
5139                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5140                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5141                                 continue;
5142                         }
5143                 }
5144
5145                 unsigned pos = next_pos++;
5146                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5147                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5148                         expression_t *expr = argument->expression;
5149                         ir_node      *addr = expression_to_addr(expr);
5150                         /* in+output, construct an artifical same_as constraint on the
5151                          * input */
5152                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5153                                 char     buf[64];
5154                                 ir_node *value = get_value_from_lvalue(expr, addr);
5155
5156                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5157
5158                                 ir_asm_constraint constraint;
5159                                 constraint.pos              = pos;
5160                                 constraint.constraint       = new_id_from_str(buf);
5161                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5162                                 tmp_in_constraints[in_size] = constraint;
5163                                 ins[in_size] = value;
5164
5165                                 ++in_size;
5166                         }
5167
5168                         out_exprs[out_size] = expr;
5169                         out_addrs[out_size] = addr;
5170                         ++out_size;
5171                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5172                         /* pure memory ops need no input (but we have to make sure we
5173                          * attach to the memory) */
5174                         assert(! (asm_flags &
5175                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5176                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5177                         needs_memory = true;
5178
5179                         /* we need to attach the address to the inputs */
5180                         expression_t *expr = argument->expression;
5181
5182                         ir_asm_constraint constraint;
5183                         constraint.pos              = pos;
5184                         constraint.constraint       = new_id_from_str(constraints);
5185                         constraint.mode             = NULL;
5186                         tmp_in_constraints[in_size] = constraint;
5187
5188                         ins[in_size]          = expression_to_addr(expr);
5189                         ++in_size;
5190                         continue;
5191                 } else {
5192                         errorf(&statement->base.source_position,
5193                                "only modifiers but no place set in constraints '%s'",
5194                                constraints);
5195                         continue;
5196                 }
5197
5198                 ir_asm_constraint constraint;
5199                 constraint.pos        = pos;
5200                 constraint.constraint = new_id_from_str(constraints);
5201                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5202
5203                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5204         }
5205         assert(obstack_object_size(&asm_obst)
5206                         == out_size * sizeof(ir_asm_constraint));
5207         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5208
5209
5210         obstack_grow(&asm_obst, tmp_in_constraints,
5211                      in_size * sizeof(tmp_in_constraints[0]));
5212         /* find and count input and output arguments */
5213         argument = statement->inputs;
5214         for ( ; argument != NULL; argument = argument->next) {
5215                 const char *constraints = argument->constraints.begin;
5216                 asm_constraint_flags_t asm_flags
5217                         = be_parse_asm_constraints(constraints);
5218
5219                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5220                         errorf(&statement->base.source_position,
5221                                "some constraints in '%s' are not supported", constraints);
5222                         continue;
5223                 }
5224                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5225                         errorf(&statement->base.source_position,
5226                                "some constraints in '%s' are invalid", constraints);
5227                         continue;
5228                 }
5229                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5230                         errorf(&statement->base.source_position,
5231                                "write flag specified for input constraints '%s'",
5232                                constraints);
5233                         continue;
5234                 }
5235
5236                 ir_node *input;
5237                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5238                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5239                         /* we can treat this as "normal" input */
5240                         input = expression_to_firm(argument->expression);
5241                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5242                         /* pure memory ops need no input (but we have to make sure we
5243                          * attach to the memory) */
5244                         assert(! (asm_flags &
5245                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5246                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5247                         needs_memory = true;
5248                         input = expression_to_addr(argument->expression);
5249                 } else {
5250                         errorf(&statement->base.source_position,
5251                                "only modifiers but no place set in constraints '%s'",
5252                                constraints);
5253                         continue;
5254                 }
5255
5256                 ir_asm_constraint constraint;
5257                 constraint.pos        = next_pos++;
5258                 constraint.constraint = new_id_from_str(constraints);
5259                 constraint.mode       = get_irn_mode(input);
5260
5261                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5262                 ins[in_size++] = input;
5263         }
5264
5265         if (needs_memory) {
5266                 ir_asm_constraint constraint;
5267                 constraint.pos        = next_pos++;
5268                 constraint.constraint = new_id_from_str("");
5269                 constraint.mode       = mode_M;
5270
5271                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5272                 ins[in_size++] = get_store();
5273         }
5274
5275         assert(obstack_object_size(&asm_obst)
5276                         == in_size * sizeof(ir_asm_constraint));
5277         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5278
5279         /* create asm node */
5280         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5281
5282         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5283
5284         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5285                                   out_size, output_constraints,
5286                                   n_clobbers, clobbers, asm_text);
5287
5288         if (statement->is_volatile) {
5289                 set_irn_pinned(node, op_pin_state_pinned);
5290         } else {
5291                 set_irn_pinned(node, op_pin_state_floats);
5292         }
5293
5294         /* create output projs & connect them */
5295         if (needs_memory) {
5296                 ir_node *projm = new_Proj(node, mode_M, out_size);
5297                 set_store(projm);
5298         }
5299
5300         size_t i;
5301         for (i = 0; i < out_size; ++i) {
5302                 const expression_t *out_expr = out_exprs[i];
5303                 long                pn       = i;
5304                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5305                 ir_node            *proj     = new_Proj(node, mode, pn);
5306                 ir_node            *addr     = out_addrs[i];
5307
5308                 set_value_for_expression_addr(out_expr, proj, addr);
5309         }
5310 }
5311
5312 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5313 {
5314         statement_to_firm(statement->try_statement);
5315         source_position_t const *const pos = &statement->base.source_position;
5316         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5317 }
5318
5319 static void leave_statement_to_firm(leave_statement_t *statement)
5320 {
5321         errorf(&statement->base.source_position, "__leave not supported yet");
5322 }
5323
5324 /**
5325  * Transform a statement.
5326  */
5327 static void statement_to_firm(statement_t *statement)
5328 {
5329 #ifndef NDEBUG
5330         assert(!statement->base.transformed);
5331         statement->base.transformed = true;
5332 #endif
5333
5334         switch (statement->kind) {
5335         case STATEMENT_ERROR:
5336                 panic("error statement found");
5337         case STATEMENT_EMPTY:
5338                 /* nothing */
5339                 return;
5340         case STATEMENT_COMPOUND:
5341                 compound_statement_to_firm(&statement->compound);
5342                 return;
5343         case STATEMENT_RETURN:
5344                 return_statement_to_firm(&statement->returns);
5345                 return;
5346         case STATEMENT_EXPRESSION:
5347                 expression_statement_to_firm(&statement->expression);
5348                 return;
5349         case STATEMENT_IF:
5350                 if_statement_to_firm(&statement->ifs);
5351                 return;
5352         case STATEMENT_WHILE:
5353                 while_statement_to_firm(&statement->whiles);
5354                 return;
5355         case STATEMENT_DO_WHILE:
5356                 do_while_statement_to_firm(&statement->do_while);
5357                 return;
5358         case STATEMENT_DECLARATION:
5359                 declaration_statement_to_firm(&statement->declaration);
5360                 return;
5361         case STATEMENT_BREAK:
5362                 create_jump_statement(statement, get_break_label());
5363                 return;
5364         case STATEMENT_CONTINUE:
5365                 create_jump_statement(statement, continue_label);
5366                 return;
5367         case STATEMENT_SWITCH:
5368                 switch_statement_to_firm(&statement->switchs);
5369                 return;
5370         case STATEMENT_CASE_LABEL:
5371                 case_label_to_firm(&statement->case_label);
5372                 return;
5373         case STATEMENT_FOR:
5374                 for_statement_to_firm(&statement->fors);
5375                 return;
5376         case STATEMENT_LABEL:
5377                 label_to_firm(&statement->label);
5378                 return;
5379         case STATEMENT_GOTO:
5380                 goto_to_firm(&statement->gotos);
5381                 return;
5382         case STATEMENT_ASM:
5383                 asm_statement_to_firm(&statement->asms);
5384                 return;
5385         case STATEMENT_MS_TRY:
5386                 ms_try_statement_to_firm(&statement->ms_try);
5387                 return;
5388         case STATEMENT_LEAVE:
5389                 leave_statement_to_firm(&statement->leave);
5390                 return;
5391         }
5392         panic("statement not implemented");
5393 }
5394
5395 static int count_local_variables(const entity_t *entity,
5396                                  const entity_t *const last)
5397 {
5398         int count = 0;
5399         entity_t const *const end = last != NULL ? last->base.next : NULL;
5400         for (; entity != end; entity = entity->base.next) {
5401                 type_t *type;
5402                 bool    address_taken;
5403
5404                 if (entity->kind == ENTITY_VARIABLE) {
5405                         type          = skip_typeref(entity->declaration.type);
5406                         address_taken = entity->variable.address_taken;
5407                 } else if (entity->kind == ENTITY_PARAMETER) {
5408                         type          = skip_typeref(entity->declaration.type);
5409                         address_taken = entity->parameter.address_taken;
5410                 } else {
5411                         continue;
5412                 }
5413
5414                 if (!address_taken && is_type_scalar(type))
5415                         ++count;
5416         }
5417         return count;
5418 }
5419
5420 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5421 {
5422         int *const count = env;
5423
5424         switch (stmt->kind) {
5425         case STATEMENT_DECLARATION: {
5426                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5427                 *count += count_local_variables(decl_stmt->declarations_begin,
5428                                 decl_stmt->declarations_end);
5429                 break;
5430         }
5431
5432         case STATEMENT_FOR:
5433                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5434                 break;
5435
5436         default:
5437                 break;
5438         }
5439 }
5440
5441 /**
5442  * Return the number of local (alias free) variables used by a function.
5443  */
5444 static int get_function_n_local_vars(entity_t *entity)
5445 {
5446         const function_t *function = &entity->function;
5447         int count = 0;
5448
5449         /* count parameters */
5450         count += count_local_variables(function->parameters.entities, NULL);
5451
5452         /* count local variables declared in body */
5453         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5454         return count;
5455 }
5456
5457 /**
5458  * Build Firm code for the parameters of a function.
5459  */
5460 static void initialize_function_parameters(entity_t *entity)
5461 {
5462         assert(entity->kind == ENTITY_FUNCTION);
5463         ir_graph *irg             = current_ir_graph;
5464         ir_node  *args            = get_irg_args(irg);
5465         int       n               = 0;
5466         ir_type  *function_irtype;
5467
5468         if (entity->function.need_closure) {
5469                 /* add an extra parameter for the static link */
5470                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5471                 ++n;
5472
5473                 /* Matze: IMO this is wrong, nested functions should have an own
5474                  * type and not rely on strange parameters... */
5475                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5476         } else {
5477                 function_irtype = get_ir_type(entity->declaration.type);
5478         }
5479
5480
5481
5482         entity_t *parameter = entity->function.parameters.entities;
5483         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5484                 if (parameter->kind != ENTITY_PARAMETER)
5485                         continue;
5486
5487                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5488                 type_t *type = skip_typeref(parameter->declaration.type);
5489
5490                 bool needs_entity = parameter->parameter.address_taken;
5491                 assert(!is_type_array(type));
5492                 if (is_type_compound(type)) {
5493                         needs_entity = true;
5494                 }
5495
5496                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5497                 if (needs_entity) {
5498                         ir_type   *frame_type = get_irg_frame_type(irg);
5499                         ir_entity *param
5500                                 = new_parameter_entity(frame_type, n, param_irtype);
5501                         parameter->declaration.kind
5502                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5503                         parameter->parameter.v.entity = param;
5504                         continue;
5505                 }
5506
5507                 ir_mode *param_mode = get_type_mode(param_irtype);
5508                 long     pn         = n;
5509                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5510
5511                 ir_mode *mode = get_ir_mode_storage(type);
5512                 value = create_conv(NULL, value, mode);
5513                 value = do_strict_conv(NULL, value);
5514
5515                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5516                 parameter->parameter.v.value_number = next_value_number_function;
5517                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5518                                         parameter);
5519                 ++next_value_number_function;
5520
5521                 set_value(parameter->parameter.v.value_number, value);
5522         }
5523 }
5524
5525 /**
5526  * Handle additional decl modifiers for IR-graphs
5527  *
5528  * @param irg            the IR-graph
5529  * @param dec_modifiers  additional modifiers
5530  */
5531 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5532                                      decl_modifiers_t decl_modifiers)
5533 {
5534         if (decl_modifiers & DM_NAKED) {
5535                 /* TRUE if the declaration includes the Microsoft
5536                    __declspec(naked) specifier. */
5537                 add_irg_additional_properties(irg, mtp_property_naked);
5538         }
5539         if (decl_modifiers & DM_FORCEINLINE) {
5540                 /* TRUE if the declaration includes the
5541                    Microsoft __forceinline specifier. */
5542                 set_irg_inline_property(irg, irg_inline_forced);
5543         }
5544         if (decl_modifiers & DM_NOINLINE) {
5545                 /* TRUE if the declaration includes the Microsoft
5546                    __declspec(noinline) specifier. */
5547                 set_irg_inline_property(irg, irg_inline_forbidden);
5548         }
5549 }
5550
5551 static void add_function_pointer(ir_type *segment, ir_entity *method,
5552                                  const char *unique_template)
5553 {
5554         ir_type   *method_type  = get_entity_type(method);
5555         ir_type   *ptr_type     = new_type_pointer(method_type);
5556
5557         /* these entities don't really have a name but firm only allows
5558          * "" in ld_ident.
5559          * Note that we mustn't give these entities a name since for example
5560          * Mach-O doesn't allow them. */
5561         ident     *ide          = id_unique(unique_template);
5562         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5563         ir_graph  *irg          = get_const_code_irg();
5564         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5565                                                            method);
5566
5567         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5568         set_entity_compiler_generated(ptr, 1);
5569         set_entity_visibility(ptr, ir_visibility_private);
5570         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5571         set_atomic_ent_value(ptr, val);
5572 }
5573
5574 /**
5575  * Generate possible IJmp branches to a given label block.
5576  */
5577 static void gen_ijmp_branches(ir_node *block)
5578 {
5579         ir_node *ijmp;
5580         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5581                 add_immBlock_pred(block, ijmp);
5582         }
5583 }
5584
5585 /**
5586  * Create code for a function and all inner functions.
5587  *
5588  * @param entity  the function entity
5589  */
5590 static void create_function(entity_t *entity)
5591 {
5592         assert(entity->kind == ENTITY_FUNCTION);
5593         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5594
5595         if (entity->function.statement == NULL)
5596                 return;
5597
5598         if (is_main(entity) && enable_main_collect2_hack) {
5599                 prepare_main_collect2(entity);
5600         }
5601
5602         inner_functions     = NULL;
5603         current_trampolines = NULL;
5604
5605         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5606                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5607                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5608         }
5609         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5610                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5611                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5612         }
5613
5614         current_function_entity = entity;
5615         current_function_name   = NULL;
5616         current_funcsig         = NULL;
5617
5618         assert(all_labels == NULL);
5619         all_labels = NEW_ARR_F(label_t *, 0);
5620         ijmp_list  = NULL;
5621
5622         int       n_local_vars = get_function_n_local_vars(entity);
5623         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5624         current_ir_graph = irg;
5625
5626         ir_graph *old_current_function = current_function;
5627         current_function = irg;
5628
5629         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5630         current_vararg_entity = NULL;
5631
5632         set_irg_fp_model(irg, firm_fp_model);
5633         tarval_enable_fp_ops(1);
5634         set_irn_dbg_info(get_irg_start_block(irg),
5635                          get_entity_dbg_info(function_entity));
5636
5637         ir_node *first_block = get_cur_block();
5638
5639         /* set inline flags */
5640         if (entity->function.is_inline)
5641                 set_irg_inline_property(irg, irg_inline_recomended);
5642         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5643
5644         next_value_number_function = 0;
5645         initialize_function_parameters(entity);
5646         current_static_link = entity->function.static_link;
5647
5648         statement_to_firm(entity->function.statement);
5649
5650         ir_node *end_block = get_irg_end_block(irg);
5651
5652         /* do we have a return statement yet? */
5653         if (currently_reachable()) {
5654                 type_t *type = skip_typeref(entity->declaration.type);
5655                 assert(is_type_function(type));
5656                 const function_type_t *func_type   = &type->function;
5657                 const type_t          *return_type
5658                         = skip_typeref(func_type->return_type);
5659
5660                 ir_node *ret;
5661                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5662                         ret = new_Return(get_store(), 0, NULL);
5663                 } else {
5664                         ir_mode *mode;
5665                         if (is_type_scalar(return_type)) {
5666                                 mode = get_ir_mode_storage(func_type->return_type);
5667                         } else {
5668                                 mode = mode_P_data;
5669                         }
5670
5671                         ir_node *in[1];
5672                         /* §5.1.2.2.3 main implicitly returns 0 */
5673                         if (is_main(entity)) {
5674                                 in[0] = new_Const(get_mode_null(mode));
5675                         } else {
5676                                 in[0] = new_Unknown(mode);
5677                         }
5678                         ret = new_Return(get_store(), 1, in);
5679                 }
5680                 add_immBlock_pred(end_block, ret);
5681         }
5682
5683         bool has_computed_gotos = false;
5684         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5685                 label_t *label = all_labels[i];
5686                 if (label->address_taken) {
5687                         gen_ijmp_branches(label->block);
5688                         has_computed_gotos = true;
5689                 }
5690                 mature_immBlock(label->block);
5691         }
5692         if (has_computed_gotos) {
5693                 /* if we have computed goto's in the function, we cannot inline it */
5694                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5695                         source_position_t const *const pos = &entity->base.source_position;
5696                         warningf(WARN_OTHER, pos, "'%N' can never be inlined because it contains a computed goto", entity);
5697                 }
5698                 set_irg_inline_property(irg, irg_inline_forbidden);
5699         }
5700
5701         DEL_ARR_F(all_labels);
5702         all_labels = NULL;
5703
5704         mature_immBlock(first_block);
5705         mature_immBlock(end_block);
5706
5707         irg_finalize_cons(irg);
5708
5709         /* finalize the frame type */
5710         ir_type *frame_type = get_irg_frame_type(irg);
5711         int      n          = get_compound_n_members(frame_type);
5712         int      align_all  = 4;
5713         int      offset     = 0;
5714         for (int i = 0; i < n; ++i) {
5715                 ir_entity *member      = get_compound_member(frame_type, i);
5716                 ir_type   *entity_type = get_entity_type(member);
5717
5718                 int align = get_type_alignment_bytes(entity_type);
5719                 if (align > align_all)
5720                         align_all = align;
5721                 int misalign = 0;
5722                 if (align > 0) {
5723                         misalign  = offset % align;
5724                         if (misalign > 0) {
5725                                 offset += align - misalign;
5726                         }
5727                 }
5728
5729                 set_entity_offset(member, offset);
5730                 offset += get_type_size_bytes(entity_type);
5731         }
5732         set_type_size_bytes(frame_type, offset);
5733         set_type_alignment_bytes(frame_type, align_all);
5734
5735         irg_verify(irg, VERIFY_ENFORCE_SSA);
5736         current_vararg_entity = old_current_vararg_entity;
5737         current_function      = old_current_function;
5738
5739         if (current_trampolines != NULL) {
5740                 DEL_ARR_F(current_trampolines);
5741                 current_trampolines = NULL;
5742         }
5743
5744         /* create inner functions if any */
5745         entity_t **inner = inner_functions;
5746         if (inner != NULL) {
5747                 ir_type *rem_outer_frame      = current_outer_frame;
5748                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5749                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5750                         create_function(inner[i]);
5751                 }
5752                 DEL_ARR_F(inner);
5753
5754                 current_outer_frame      = rem_outer_frame;
5755         }
5756 }
5757
5758 static void scope_to_firm(scope_t *scope)
5759 {
5760         /* first pass: create declarations */
5761         entity_t *entity = scope->entities;
5762         for ( ; entity != NULL; entity = entity->base.next) {
5763                 if (entity->base.symbol == NULL)
5764                         continue;
5765
5766                 if (entity->kind == ENTITY_FUNCTION) {
5767                         if (entity->function.btk != BUILTIN_NONE) {
5768                                 /* builtins have no representation */
5769                                 continue;
5770                         }
5771                         (void)get_function_entity(entity, NULL);
5772                 } else if (entity->kind == ENTITY_VARIABLE) {
5773                         create_global_variable(entity);
5774                 } else if (entity->kind == ENTITY_NAMESPACE) {
5775                         scope_to_firm(&entity->namespacee.members);
5776                 }
5777         }
5778
5779         /* second pass: create code/initializers */
5780         entity = scope->entities;
5781         for ( ; entity != NULL; entity = entity->base.next) {
5782                 if (entity->base.symbol == NULL)
5783                         continue;
5784
5785                 if (entity->kind == ENTITY_FUNCTION) {
5786                         if (entity->function.btk != BUILTIN_NONE) {
5787                                 /* builtins have no representation */
5788                                 continue;
5789                         }
5790                         create_function(entity);
5791                 } else if (entity->kind == ENTITY_VARIABLE) {
5792                         assert(entity->declaration.kind
5793                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5794                         current_ir_graph = get_const_code_irg();
5795                         create_variable_initializer(entity);
5796                 }
5797         }
5798 }
5799
5800 void init_ast2firm(void)
5801 {
5802         obstack_init(&asm_obst);
5803         init_atomic_modes();
5804
5805         ir_set_debug_retrieve(dbg_retrieve);
5806         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5807
5808         /* create idents for all known runtime functions */
5809         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5810                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5811         }
5812
5813         entitymap_init(&entitymap);
5814 }
5815
5816 static void init_ir_types(void)
5817 {
5818         static int ir_types_initialized = 0;
5819         if (ir_types_initialized)
5820                 return;
5821         ir_types_initialized = 1;
5822
5823         ir_type_int        = get_ir_type(type_int);
5824         ir_type_char       = get_ir_type(type_char);
5825         ir_type_const_char = get_ir_type(type_const_char);
5826         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5827         ir_type_void       = get_ir_type(type_void);
5828
5829         be_params             = be_get_backend_param();
5830         mode_float_arithmetic = be_params->mode_float_arithmetic;
5831
5832         stack_param_align     = be_params->stack_param_align;
5833 }
5834
5835 void exit_ast2firm(void)
5836 {
5837         entitymap_destroy(&entitymap);
5838         obstack_free(&asm_obst, NULL);
5839 }
5840
5841 static void global_asm_to_firm(statement_t *s)
5842 {
5843         for (; s != NULL; s = s->base.next) {
5844                 assert(s->kind == STATEMENT_ASM);
5845
5846                 char const *const text = s->asms.asm_text.begin;
5847                 size_t            size = s->asms.asm_text.size;
5848
5849                 /* skip the last \0 */
5850                 if (text[size - 1] == '\0')
5851                         --size;
5852
5853                 ident *const id = new_id_from_chars(text, size);
5854                 add_irp_asm(id);
5855         }
5856 }
5857
5858 void translation_unit_to_firm(translation_unit_t *unit)
5859 {
5860         /* initialize firm arithmetic */
5861         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5862         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5863
5864         /* just to be sure */
5865         continue_label           = NULL;
5866         break_label              = NULL;
5867         current_switch_cond      = NULL;
5868         current_translation_unit = unit;
5869
5870         init_ir_types();
5871
5872         scope_to_firm(&unit->scope);
5873         global_asm_to_firm(unit->global_asm);
5874
5875         current_ir_graph         = NULL;
5876         current_translation_unit = NULL;
5877 }