nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2012 Matthias Braun <matze@braunis.de>
   4  */
   5 #include <config.h>
   6
   7 #include <assert.h>
   8 #include <string.h>
   9 #include <stdbool.h>
  10 #include <unistd.h>
  11
  12 #include <libfirm/firm.h>
  13 #include <libfirm/adt/obst.h>
  14 #include <libfirm/be.h>
  15
  16 #include "ast2firm.h"
  17
  18 #include "adt/error.h"
  19 #include "adt/array.h"
  20 #include "adt/strutil.h"
  21 #include "adt/util.h"
  22 #include "jump_target.h"
  23 #include "symbol_t.h"
  24 #include "symbol_table.h"
  25 #include "token_t.h"
  26 #include "type_t.h"
  27 #include "ast_t.h"
  28 #include "entity_t.h"
  29 #include "parser.h"
  30 #include "diagnostic.h"
  31 #include "lang_features.h"
  32 #include "types.h"
  33 #include "mangle.h"
  34 #include "unicode.h"
  35 #include "walk.h"
  36 #include "warning.h"
  37 #include "printer.h"
  38 #include "entitymap_t.h"
  39 #include "driver/firm_opt.h"
  40
  41 typedef struct trampoline_region trampoline_region;
  42 struct trampoline_region {
  43         ir_entity        *function;    /**< The function that is called by this trampoline */
  44         ir_entity        *region;      /**< created region for the trampoline */
  45 };
  46
  47 typedef struct complex_value {
  48         ir_node *real;
  49         ir_node *imag;
  50 } complex_value;
  51
  52 typedef struct complex_constant {
  53         ir_tarval *real;
  54         ir_tarval *imag;
  55 } complex_constant;
  56
  57 fp_model_t firm_fp_model = fp_model_precise;
  58
  59 static const backend_params *be_params;
  60
  61 static ir_type *ir_type_char;
  62
  63 /* architecture specific floating point arithmetic mode (if any) */
  64 static ir_mode *mode_float_arithmetic;
  65
  66 /* alignment of stack parameters */
  67 static unsigned stack_param_align;
  68
  69 static int         next_value_number_function;
  70 static jump_target continue_target;
  71 static jump_target break_target;
  72 static ir_node    *current_switch;
  73 static bool        saw_default_label;
  74 static entity_t  **inner_functions;
  75 static jump_target ijmp_target;
  76 static ir_node   **ijmp_ops;
  77 static ir_node   **ijmp_blocks;
  78 static bool        constant_folding;
  79
  80 #define PUSH_BREAK(val) \
  81         jump_target const old_break_target = break_target; \
  82         (init_jump_target(&break_target, (val)))
  83 #define POP_BREAK() \
  84         ((void)(break_target = old_break_target))
  85
  86 #define PUSH_CONTINUE(val) \
  87         jump_target const old_continue_target = continue_target; \
  88         (init_jump_target(&continue_target, (val)))
  89 #define POP_CONTINUE() \
  90         ((void)(continue_target = old_continue_target))
  91
  92 #define PUSH_IRG(val) \
  93         ir_graph *const old_irg = current_ir_graph; \
  94         ir_graph *const new_irg = (val); \
  95         ((void)(current_ir_graph = new_irg))
  96
  97 #define POP_IRG() \
  98         (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
  99
 100 static const entity_t     *current_function_entity;
 101 static ir_node            *current_function_name;
 102 static ir_node            *current_funcsig;
 103 static ir_graph           *current_function;
 104 static translation_unit_t *current_translation_unit;
 105 static trampoline_region  *current_trampolines;
 106 static ir_type            *current_outer_frame;
 107 static ir_node            *current_static_link;
 108 static ir_entity          *current_vararg_entity;
 109
 110 static entitymap_t  entitymap;
 111
 112 static struct obstack asm_obst;
 113
 114 typedef enum declaration_kind_t {
 115         DECLARATION_KIND_UNKNOWN,
 116         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 117         DECLARATION_KIND_GLOBAL_VARIABLE,
 118         DECLARATION_KIND_LOCAL_VARIABLE,
 119         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 120         DECLARATION_KIND_PARAMETER,
 121         DECLARATION_KIND_PARAMETER_ENTITY,
 122         DECLARATION_KIND_FUNCTION,
 123         DECLARATION_KIND_COMPOUND_MEMBER,
 124         DECLARATION_KIND_INNER_FUNCTION
 125 } declaration_kind_t;
 126
 127 static ir_type *get_ir_type_incomplete(type_t *type);
 128
 129 static void enqueue_inner_function(entity_t *entity)
 130 {
 131         if (inner_functions == NULL)
 132                 inner_functions = NEW_ARR_F(entity_t *, 0);
 133         ARR_APP1(entity_t*, inner_functions, entity);
 134 }
 135
 136 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 137 {
 138         const entity_t *entity = get_irg_loc_description(irg, pos);
 139         if (entity)
 140                 warningf(WARN_UNINITIALIZED, &entity->base.pos, "'%N' might be used uninitialized", entity);
 141         return new_r_Unknown(irg, mode);
 142 }
 143
 144 static src_loc_t dbg_retrieve(const dbg_info *dbg)
 145 {
 146         position_t const *const pos = (position_t const*)dbg;
 147         if (pos) {
 148                 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
 149         } else {
 150                 return (src_loc_t){ NULL, 0, 0 };
 151         }
 152 }
 153
 154 static dbg_info *get_dbg_info(const position_t *pos)
 155 {
 156         return (dbg_info*) pos;
 157 }
 158
 159 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 160                                     const type_dbg_info *dbg)
 161 {
 162         assert(dbg != NULL);
 163         print_to_buffer(buffer, buffer_size);
 164         const type_t *type = (const type_t*) dbg;
 165         print_type(type);
 166         finish_print_to_buffer();
 167 }
 168
 169 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 170 {
 171         return (type_dbg_info*) type;
 172 }
 173
 174 /* is the current block a reachable one? */
 175 static bool currently_reachable(void)
 176 {
 177         ir_node *const block = get_cur_block();
 178         return block != NULL && !is_Bad(block);
 179 }
 180
 181 static void set_unreachable_now(void)
 182 {
 183         set_cur_block(NULL);
 184 }
 185
 186 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 187
 188 static ir_node *expression_to_control_flow(expression_t const *expr, jump_target *true_target, jump_target *false_target);
 189 static ir_node *expression_to_value(expression_t const *expr);
 190 static complex_value expression_to_complex(const expression_t *expression);
 191
 192 static unsigned decide_modulo_shift(unsigned type_size)
 193 {
 194         if (architecture_modulo_shift == 0)
 195                 return 0;
 196         return MAX(type_size, architecture_modulo_shift);
 197 }
 198
 199 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 200 {
 201         unsigned flags = get_atomic_type_flags(kind);
 202         unsigned size  = get_atomic_type_size(kind);
 203         if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
 204                 switch (size) {
 205                 case 4:  return get_modeF();
 206                 case 8:  return get_modeD();
 207                 default: panic("unexpected kind");
 208                 }
 209         } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 210                 char            name[64];
 211                 unsigned        bit_size     = size * 8;
 212                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 213                 unsigned        modulo_shift = decide_modulo_shift(bit_size);
 214
 215                 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
 216                 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
 217                                     modulo_shift);
 218         }
 219
 220         return NULL;
 221 }
 222
 223 /**
 224  * Initialises the atomic modes depending on the machine size.
 225  */
 226 static void init_atomic_modes(void)
 227 {
 228         atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
 229         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 230                 if (atomic_modes[i] != NULL)
 231                         continue;
 232                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 233         }
 234 }
 235
 236 static ir_node *get_vla_size(array_type_t *const type)
 237 {
 238         ir_node *size_node = type->size_node;
 239         if (size_node == NULL) {
 240                 size_node = expression_to_value(type->size_expression);
 241                 type->size_node = size_node;
 242         }
 243         return size_node;
 244 }
 245
 246 static unsigned count_parameters(const function_type_t *function_type)
 247 {
 248         unsigned count = 0;
 249
 250         function_parameter_t *parameter = function_type->parameters;
 251         for ( ; parameter != NULL; parameter = parameter->next) {
 252                 ++count;
 253         }
 254
 255         return count;
 256 }
 257
 258 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
 259                                         type_dbg_info *dbgi)
 260 {
 261         ir_mode        *mode      = atomic_modes[akind];
 262         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 263         unsigned        alignment = get_atomic_type_alignment(akind);
 264         unsigned        size      = get_atomic_type_size(akind);
 265
 266         set_type_size_bytes(irtype, size);
 267         set_type_alignment_bytes(irtype, alignment);
 268
 269         return irtype;
 270 }
 271
 272 /**
 273  * Creates a Firm type for an atomic type
 274  */
 275 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 276 {
 277         type_dbg_info *dbgi = get_type_dbg_info_(type);
 278         return create_primitive_irtype(akind, dbgi);
 279 }
 280
 281 /**
 282  * Creates a Firm type for a complex type
 283  */
 284 static ir_type *create_complex_type(atomic_type_kind_t akind,
 285                                     const type_t *type)
 286 {
 287         type_dbg_info *dbgi   = get_type_dbg_info_(type);
 288         ir_type       *etype  = create_primitive_irtype(akind, NULL);
 289         ir_type       *irtype = new_d_type_array(1, etype, dbgi);
 290
 291         int align = get_type_alignment_bytes(etype);
 292         set_type_alignment_bytes(irtype, align);
 293         unsigned n_elements = 2;
 294         set_array_bounds_int(irtype, 0, 0, n_elements);
 295         size_t elemsize = get_type_size_bytes(etype);
 296         if (elemsize % align > 0) {
 297                 elemsize += align - (elemsize % align);
 298         }
 299         set_type_size_bytes(irtype, n_elements * elemsize);
 300         set_type_state(irtype, layout_fixed);
 301
 302         return irtype;
 303 }
 304
 305 /**
 306  * Creates a Firm type for an imaginary type
 307  */
 308 static ir_type *create_imaginary_type(const atomic_type_t *type)
 309 {
 310         return create_atomic_type(type->akind, (const type_t*)type);
 311 }
 312
 313 /**
 314  * return type of a parameter (and take transparent union gnu extension into
 315  * account)
 316  */
 317 static type_t *get_parameter_type(type_t *orig_type)
 318 {
 319         type_t *type = skip_typeref(orig_type);
 320         if (is_type_union(type)
 321                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 322                 compound_t *compound = type->compound.compound;
 323                 type                 = compound->members.entities->declaration.type;
 324         }
 325
 326         return type;
 327 }
 328
 329 static ir_type *get_ir_type(type_t *type);
 330
 331 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 332 {
 333         type_t        *return_type  = skip_typeref(function_type->return_type);
 334
 335         int            n_parameters = count_parameters(function_type)
 336                                        + (for_closure ? 1 : 0);
 337         int            n_results    = is_type_void(return_type) ? 0 : 1;
 338         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 339         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 340
 341         if (!is_type_void(return_type)) {
 342                 ir_type *restype = get_ir_type(return_type);
 343                 set_method_res_type(irtype, 0, restype);
 344         }
 345
 346         function_parameter_t *parameter = function_type->parameters;
 347         int                   n         = 0;
 348         if (for_closure) {
 349                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 350                 set_method_param_type(irtype, n, p_irtype);
 351                 ++n;
 352         }
 353         for ( ; parameter != NULL; parameter = parameter->next) {
 354                 type_t  *type     = get_parameter_type(parameter->type);
 355                 ir_type *p_irtype = get_ir_type(type);
 356                 set_method_param_type(irtype, n, p_irtype);
 357                 ++n;
 358         }
 359
 360         bool is_variadic = function_type->variadic;
 361
 362         if (is_variadic)
 363                 set_method_variadicity(irtype, variadicity_variadic);
 364
 365         unsigned cc = get_method_calling_convention(irtype);
 366         switch (function_type->calling_convention) {
 367         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 368         case CC_CDECL:
 369 is_cdecl:
 370                 set_method_calling_convention(irtype, SET_CDECL(cc));
 371                 break;
 372
 373         case CC_STDCALL:
 374                 if (is_variadic)
 375                         goto is_cdecl;
 376
 377                 /* only non-variadic function can use stdcall, else use cdecl */
 378                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 379                 break;
 380
 381         case CC_FASTCALL:
 382                 if (is_variadic)
 383                         goto is_cdecl;
 384                 /* only non-variadic function can use fastcall, else use cdecl */
 385                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 386                 break;
 387
 388         case CC_THISCALL:
 389                 /* Hmm, leave default, not accepted by the parser yet. */
 390                 break;
 391         }
 392
 393         if (for_closure)
 394                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 395
 396         const decl_modifiers_t modifiers = function_type->modifiers;
 397         if (modifiers & DM_CONST)
 398                 add_method_additional_properties(irtype, mtp_property_const);
 399         if (modifiers & DM_PURE)
 400                 add_method_additional_properties(irtype, mtp_property_pure);
 401         if (modifiers & DM_RETURNS_TWICE)
 402                 add_method_additional_properties(irtype, mtp_property_returns_twice);
 403         if (modifiers & DM_NORETURN)
 404                 add_method_additional_properties(irtype, mtp_property_noreturn);
 405         if (modifiers & DM_NOTHROW)
 406                 add_method_additional_properties(irtype, mtp_property_nothrow);
 407         if (modifiers & DM_MALLOC)
 408                 add_method_additional_properties(irtype, mtp_property_malloc);
 409
 410         return irtype;
 411 }
 412
 413 static ir_type *create_pointer_type(pointer_type_t *type)
 414 {
 415         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 416         type_t        *points_to    = type->points_to;
 417         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 418         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 419
 420         return irtype;
 421 }
 422
 423 static ir_type *create_reference_type(reference_type_t *type)
 424 {
 425         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 426         type_t        *refers_to    = type->refers_to;
 427         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 428         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 429
 430         return irtype;
 431 }
 432
 433 static ir_type *create_array_type(array_type_t *type)
 434 {
 435         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 436         type_t        *element_type    = type->element_type;
 437         ir_type       *ir_element_type = get_ir_type(element_type);
 438         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 439
 440         const int align = get_type_alignment_bytes(ir_element_type);
 441         set_type_alignment_bytes(irtype, align);
 442
 443         if (type->size_constant) {
 444                 int n_elements = type->size;
 445
 446                 set_array_bounds_int(irtype, 0, 0, n_elements);
 447
 448                 size_t elemsize = get_type_size_bytes(ir_element_type);
 449                 if (elemsize % align > 0) {
 450                         elemsize += align - (elemsize % align);
 451                 }
 452                 set_type_size_bytes(irtype, n_elements * elemsize);
 453         } else {
 454                 set_array_lower_bound_int(irtype, 0, 0);
 455         }
 456         set_type_state(irtype, layout_fixed);
 457
 458         return irtype;
 459 }
 460
 461 /**
 462  * Return the signed integer type of size bits.
 463  *
 464  * @param size   the size
 465  */
 466 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 467                                                  unsigned size,
 468                                                                                                  const type_t *type)
 469 {
 470         static ir_mode *s_modes[64 + 1] = {NULL, };
 471         ir_type *res;
 472         ir_mode *mode;
 473
 474         if (size <= 0 || size > 64)
 475                 return NULL;
 476
 477         mode = s_modes[size];
 478         if (mode == NULL) {
 479                 ir_mode *base_mode    = get_type_mode(base_tp);
 480                 unsigned modulo_shift = get_mode_modulo_shift(base_mode);
 481
 482                 char name[32];
 483                 snprintf(name, sizeof(name), "bf_I%u", size);
 484                 mode = new_int_mode(name, irma_twos_complement, size, 1, modulo_shift);
 485                 s_modes[size] = mode;
 486         }
 487
 488         type_dbg_info *dbgi = get_type_dbg_info_(type);
 489         res                 = new_d_type_primitive(mode, dbgi);
 490         set_primitive_base_type(res, base_tp);
 491
 492         return res;
 493 }
 494
 495 /**
 496  * Return the unsigned integer type of size bits.
 497  *
 498  * @param size   the size
 499  */
 500 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 501                                                    unsigned size,
 502                                                                                                    const type_t *type)
 503 {
 504         static ir_mode *u_modes[64 + 1] = {NULL, };
 505         ir_type *res;
 506         ir_mode *mode;
 507
 508         if (size <= 0 || size > 64)
 509                 return NULL;
 510
 511         mode = u_modes[size];
 512         if (mode == NULL) {
 513                 ir_mode *base_mode    = get_type_mode(base_tp);
 514                 unsigned modulo_shift = get_mode_modulo_shift(base_mode);
 515
 516                 char name[32];
 517                 snprintf(name, sizeof(name), "bf_U%u", size);
 518                 mode = new_int_mode(name, irma_twos_complement, size, 0, modulo_shift);
 519                 u_modes[size] = mode;
 520         }
 521
 522         type_dbg_info *dbgi = get_type_dbg_info_(type);
 523         res = new_d_type_primitive(mode, dbgi);
 524         set_primitive_base_type(res, base_tp);
 525
 526         return res;
 527 }
 528
 529 static ir_type *create_bitfield_type(const entity_t *entity)
 530 {
 531         assert(entity->kind == ENTITY_COMPOUND_MEMBER);
 532         type_t *base = skip_typeref(entity->declaration.type);
 533         assert(is_type_integer(base));
 534         ir_type *irbase = get_ir_type(base);
 535
 536         unsigned bit_size = entity->compound_member.bit_size;
 537
 538         if (is_type_signed(base)) {
 539                 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
 540         } else {
 541                 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
 542         }
 543 }
 544
 545 /**
 546  * Construct firm type from ast struct type.
 547  */
 548 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
 549 {
 550         compound_t *compound = type->compound;
 551
 552         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 553                 return compound->irtype;
 554         }
 555
 556         bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
 557
 558         symbol_t *type_symbol = compound->base.symbol;
 559         ident    *id;
 560         if (type_symbol != NULL) {
 561                 id = new_id_from_str(type_symbol->string);
 562         } else {
 563                 if (is_union) {
 564                         id = id_unique("__anonymous_union.%u");
 565                 } else {
 566                         id = id_unique("__anonymous_struct.%u");
 567                 }
 568         }
 569
 570         ir_type *irtype;
 571         if (is_union) {
 572                 irtype = new_type_union(id);
 573         } else {
 574                 irtype = new_type_struct(id);
 575         }
 576
 577         compound->irtype_complete = false;
 578         compound->irtype          = irtype;
 579
 580         if (incomplete)
 581                 return irtype;
 582
 583         if (is_union) {
 584                 layout_union_type(type);
 585         } else {
 586                 layout_struct_type(type);
 587         }
 588
 589         compound->irtype_complete = true;
 590
 591         entity_t *entry = compound->members.entities;
 592         for ( ; entry != NULL; entry = entry->base.next) {
 593                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 594                         continue;
 595
 596                 symbol_t *symbol     = entry->base.symbol;
 597                 type_t   *entry_type = entry->declaration.type;
 598                 ident    *member_id;
 599                 if (symbol == NULL) {
 600                         /* anonymous bitfield member, skip */
 601                         if (entry->compound_member.bitfield)
 602                                 continue;
 603                         assert(is_type_compound(entry_type));
 604                         member_id = id_unique("anon.%u");
 605                 } else {
 606                         member_id = new_id_from_str(symbol->string);
 607                 }
 608
 609                 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
 610
 611                 ir_type *entry_irtype;
 612                 if (entry->compound_member.bitfield) {
 613                         entry_irtype = create_bitfield_type(entry);
 614                 } else {
 615                         entry_irtype = get_ir_type(entry_type);
 616                 }
 617                 ir_entity *entity = new_d_entity(irtype, member_id, entry_irtype, dbgi);
 618
 619                 set_entity_offset(entity, entry->compound_member.offset);
 620                 set_entity_offset_bits_remainder(entity,
 621                                                  entry->compound_member.bit_offset);
 622
 623                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 624                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 625                 entry->compound_member.entity = entity;
 626         }
 627
 628         set_type_alignment_bytes(irtype, compound->alignment);
 629         set_type_size_bytes(irtype, compound->size);
 630         set_type_state(irtype, layout_fixed);
 631
 632         return irtype;
 633 }
 634
 635 void determine_enum_values(enum_type_t *const type)
 636 {
 637         ir_mode   *const mode    = atomic_modes[type->base.akind];
 638         ir_tarval *const one     = get_mode_one(mode);
 639         ir_tarval *      tv_next = get_mode_null(mode);
 640
 641         enum_t   *enume = type->enume;
 642         entity_t *entry = enume->base.next;
 643         for (; entry != NULL; entry = entry->base.next) {
 644                 if (entry->kind != ENTITY_ENUM_VALUE)
 645                         break;
 646
 647                 expression_t *const init = entry->enum_value.value;
 648                 if (init != NULL) {
 649                         tv_next = fold_constant_to_tarval(init);
 650                 }
 651                 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
 652                 entry->enum_value.tv = tv_next;
 653                 tv_next = tarval_add(tv_next, one);
 654         }
 655 }
 656
 657 static ir_type *create_enum_type(enum_type_t *const type)
 658 {
 659         return create_atomic_type(type->base.akind, (const type_t*) type);
 660 }
 661
 662 static ir_type *get_ir_type_incomplete(type_t *type)
 663 {
 664         type = skip_typeref(type);
 665
 666         if (type->base.firm_type != NULL) {
 667                 return type->base.firm_type;
 668         }
 669
 670         if (is_type_compound(type)) {
 671                 return create_compound_type(&type->compound, true);
 672         } else {
 673                 return get_ir_type(type);
 674         }
 675 }
 676
 677 static ir_type *get_ir_type(type_t *type)
 678 {
 679         type = skip_typeref(type);
 680
 681         if (type->base.firm_type != NULL) {
 682                 return type->base.firm_type;
 683         }
 684
 685         ir_type *firm_type = NULL;
 686         switch (type->kind) {
 687         case TYPE_ATOMIC:
 688                 firm_type = create_atomic_type(type->atomic.akind, type);
 689                 break;
 690         case TYPE_COMPLEX:
 691                 firm_type = create_complex_type(type->atomic.akind, type);
 692                 break;
 693         case TYPE_IMAGINARY:
 694                 firm_type = create_imaginary_type(&type->atomic);
 695                 break;
 696         case TYPE_FUNCTION:
 697                 firm_type = create_method_type(&type->function, false);
 698                 break;
 699         case TYPE_POINTER:
 700                 firm_type = create_pointer_type(&type->pointer);
 701                 break;
 702         case TYPE_REFERENCE:
 703                 firm_type = create_reference_type(&type->reference);
 704                 break;
 705         case TYPE_ARRAY:
 706                 firm_type = create_array_type(&type->array);
 707                 break;
 708         case TYPE_COMPOUND_STRUCT:
 709         case TYPE_COMPOUND_UNION:
 710                 firm_type = create_compound_type(&type->compound, false);
 711                 break;
 712         case TYPE_ENUM:
 713                 firm_type = create_enum_type(&type->enumt);
 714                 break;
 715
 716         case TYPE_ERROR:
 717         case TYPE_TYPEOF:
 718         case TYPE_TYPEDEF:
 719                 break;
 720         }
 721         if (firm_type == NULL)
 722                 panic("unknown type found");
 723
 724         type->base.firm_type = firm_type;
 725         return firm_type;
 726 }
 727
 728 static ir_mode *get_ir_mode_storage(type_t *type)
 729 {
 730         type = skip_typeref(type);
 731
 732         /* Firm doesn't report a mode for arrays and structs/unions. */
 733         if (!is_type_scalar(type) || is_type_complex(type)) {
 734                 return mode_P_data;
 735         }
 736
 737         ir_type *const irtype = get_ir_type(type);
 738         ir_mode *const mode   = get_type_mode(irtype);
 739         assert(mode != NULL);
 740         return mode;
 741 }
 742
 743 static ir_mode *get_complex_mode_storage(type_t *type)
 744 {
 745         assert(is_type_complex(skip_typeref(type)));
 746         ir_type *const irtype = get_ir_type(type);
 747         ir_type *const etype  = get_array_element_type(irtype);
 748         ir_mode *const mode   = get_type_mode(etype);
 749         return mode;
 750 }
 751
 752 /*
 753  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 754  * int that it returns bigger modes for floating point on some platforms
 755  * (x87 internally does arithemtic with 80bits)
 756  */
 757 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 758 {
 759         ir_mode *mode = get_ir_mode_storage(type);
 760         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 761                 return mode_float_arithmetic;
 762         }
 763
 764         return mode;
 765 }
 766
 767 static ir_mode *get_complex_mode_arithmetic(type_t *type)
 768 {
 769         ir_mode *mode = get_complex_mode_storage(type);
 770         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 771                 return mode_float_arithmetic;
 772         }
 773
 774         return mode;
 775 }
 776
 777 /**
 778  * Return a node representing the size of a type.
 779  */
 780 static ir_node *get_type_size_node(type_t *type)
 781 {
 782         ir_mode *const mode = get_ir_mode_storage(type_size_t);
 783         type = skip_typeref(type);
 784
 785         if (is_type_array(type) && type->array.is_vla) {
 786                 ir_node *size_node = get_vla_size(&type->array);
 787                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 788                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 789                 return real_size;
 790         }
 791
 792         unsigned const size = get_type_size(type);
 793         return new_Const_long(mode, size);
 794 }
 795
 796 /** Names of the runtime functions. */
 797 static const struct {
 798         int        id;           /**< the rts id */
 799         int        n_res;        /**< number of return values */
 800         const char *name;        /**< the name of the rts function */
 801         int        n_params;     /**< number of parameters */
 802         unsigned   flags;        /**< language flags */
 803 } rts_data[] = {
 804         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 805         { rts_abort,      0, "abort",        0, _C89 },
 806         { rts_alloca,     1, "alloca",       1, _ALL },
 807         { rts_abs,        1, "abs",          1, _C89 },
 808         { rts_labs,       1, "labs",         1, _C89 },
 809         { rts_llabs,      1, "llabs",        1, _C99 },
 810         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 811
 812         { rts_fabs,       1, "fabs",         1, _C89 },
 813         { rts_sqrt,       1, "sqrt",         1, _C89 },
 814         { rts_cbrt,       1, "cbrt",         1, _C99 },
 815         { rts_exp,        1, "exp",          1, _C89 },
 816         { rts_exp2,       1, "exp2",         1, _C89 },
 817         { rts_exp10,      1, "exp10",        1, _GNUC },
 818         { rts_log,        1, "log",          1, _C89 },
 819         { rts_log2,       1, "log2",         1, _C89 },
 820         { rts_log10,      1, "log10",        1, _C89 },
 821         { rts_pow,        1, "pow",          2, _C89 },
 822         { rts_sin,        1, "sin",          1, _C89 },
 823         { rts_cos,        1, "cos",          1, _C89 },
 824         { rts_tan,        1, "tan",          1, _C89 },
 825         { rts_asin,       1, "asin",         1, _C89 },
 826         { rts_acos,       1, "acos",         1, _C89 },
 827         { rts_atan,       1, "atan",         1, _C89 },
 828         { rts_sinh,       1, "sinh",         1, _C89 },
 829         { rts_cosh,       1, "cosh",         1, _C89 },
 830         { rts_tanh,       1, "tanh",         1, _C89 },
 831
 832         { rts_fabsf,      1, "fabsf",        1, _C99 },
 833         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 834         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 835         { rts_expf,       1, "expf",         1, _C99 },
 836         { rts_exp2f,      1, "exp2f",        1, _C99 },
 837         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 838         { rts_logf,       1, "logf",         1, _C99 },
 839         { rts_log2f,      1, "log2f",        1, _C99 },
 840         { rts_log10f,     1, "log10f",       1, _C99 },
 841         { rts_powf,       1, "powf",         2, _C99 },
 842         { rts_sinf,       1, "sinf",         1, _C99 },
 843         { rts_cosf,       1, "cosf",         1, _C99 },
 844         { rts_tanf,       1, "tanf",         1, _C99 },
 845         { rts_asinf,      1, "asinf",        1, _C99 },
 846         { rts_acosf,      1, "acosf",        1, _C99 },
 847         { rts_atanf,      1, "atanf",        1, _C99 },
 848         { rts_sinhf,      1, "sinhf",        1, _C99 },
 849         { rts_coshf,      1, "coshf",        1, _C99 },
 850         { rts_tanhf,      1, "tanhf",        1, _C99 },
 851
 852         { rts_fabsl,      1, "fabsl",        1, _C99 },
 853         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 854         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 855         { rts_expl,       1, "expl",         1, _C99 },
 856         { rts_exp2l,      1, "exp2l",        1, _C99 },
 857         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 858         { rts_logl,       1, "logl",         1, _C99 },
 859         { rts_log2l,      1, "log2l",        1, _C99 },
 860         { rts_log10l,     1, "log10l",       1, _C99 },
 861         { rts_powl,       1, "powl",         2, _C99 },
 862         { rts_sinl,       1, "sinl",         1, _C99 },
 863         { rts_cosl,       1, "cosl",         1, _C99 },
 864         { rts_tanl,       1, "tanl",         1, _C99 },
 865         { rts_asinl,      1, "asinl",        1, _C99 },
 866         { rts_acosl,      1, "acosl",        1, _C99 },
 867         { rts_atanl,      1, "atanl",        1, _C99 },
 868         { rts_sinhl,      1, "sinhl",        1, _C99 },
 869         { rts_coshl,      1, "coshl",        1, _C99 },
 870         { rts_tanhl,      1, "tanhl",        1, _C99 },
 871
 872         { rts_strcmp,     1, "strcmp",       2, _C89 },
 873         { rts_strncmp,    1, "strncmp",      3, _C89 },
 874         { rts_strcpy,     1, "strcpy",       2, _C89 },
 875         { rts_strlen,     1, "strlen",       1, _C89 },
 876         { rts_memcpy,     1, "memcpy",       3, _C89 },
 877         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 878         { rts_memmove,    1, "memmove",      3, _C89 },
 879         { rts_memset,     1, "memset",       3, _C89 },
 880         { rts_memcmp,     1, "memcmp",       3, _C89 },
 881 };
 882
 883 static ident *rts_idents[lengthof(rts_data)];
 884
 885 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 886
 887 void set_create_ld_ident(ident *(*func)(entity_t*))
 888 {
 889         create_ld_ident = func;
 890 }
 891
 892 static bool declaration_is_definition(const entity_t *entity)
 893 {
 894         switch (entity->kind) {
 895         case ENTITY_VARIABLE:
 896                 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
 897 // TODO: alias provides a definition
 898 //                     || entity->variable.alias != NULL;
 899         case ENTITY_FUNCTION:
 900                 return entity->function.body != NULL;
 901         case ENTITY_PARAMETER:
 902         case ENTITY_COMPOUND_MEMBER:
 903                 return false;
 904         case ENTITY_TYPEDEF:
 905         case ENTITY_ENUM:
 906         case ENTITY_ENUM_VALUE:
 907         case ENTITY_NAMESPACE:
 908         case ENTITY_LABEL:
 909         case ENTITY_LOCAL_LABEL:
 910                 break;
 911         }
 912         panic("entity is not a declaration");
 913 }
 914
 915 /**
 916  * Handle GNU attributes for entities
 917  *
 918  * @param ent   the entity
 919  * @param decl  the routine declaration
 920  */
 921 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 922 {
 923         assert(is_declaration(entity));
 924         decl_modifiers_t modifiers = entity->declaration.modifiers;
 925
 926         if (is_method_entity(irentity)) {
 927                 if (modifiers & DM_PURE)
 928                         add_entity_additional_properties(irentity, mtp_property_pure);
 929                 if (modifiers & DM_CONST)
 930                         add_entity_additional_properties(irentity, mtp_property_const);
 931                 if (modifiers & DM_NOINLINE)
 932                         add_entity_additional_properties(irentity, mtp_property_noinline);
 933                 if (modifiers & DM_FORCEINLINE)
 934                         add_entity_additional_properties(irentity, mtp_property_always_inline);
 935                 if (modifiers & DM_NAKED)
 936                         add_entity_additional_properties(irentity, mtp_property_naked);
 937                 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
 938                         add_entity_additional_properties(irentity,
 939                                                                                          mtp_property_inline_recommended);
 940         }
 941         if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
 942                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 943         }
 944 // TODO: i dont understand this logic
 945 //      if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
 946 //          && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
 947         if (modifiers & DM_WEAK) {
 948                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 949         }
 950 }
 951
 952 static bool is_main(entity_t *entity)
 953 {
 954         static symbol_t *sym_main = NULL;
 955         if (sym_main == NULL) {
 956                 sym_main = symbol_table_insert("main");
 957         }
 958
 959         if (entity->base.symbol != sym_main)
 960                 return false;
 961         /* must be in outermost scope */
 962         if (entity->base.parent_scope != &current_translation_unit->scope)
 963                 return false;
 964
 965         return true;
 966 }
 967
 968 /**
 969  * Creates an entity representing a function.
 970  *
 971  * @param entity       the function declaration/definition
 972  * @param owner_type   the owner type of this function, NULL
 973  *                     for global functions
 974  */
 975 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 976 {
 977         assert(entity->kind == ENTITY_FUNCTION);
 978         if (entity->function.irentity != NULL)
 979                 return entity->function.irentity;
 980
 981         switch (entity->function.btk) {
 982         case BUILTIN_NONE:
 983         case BUILTIN_LIBC:
 984         case BUILTIN_LIBC_CHECK:
 985                 break;
 986         default:
 987                 return NULL;
 988         }
 989
 990         symbol_t *symbol = entity->base.symbol;
 991         ident    *id     = new_id_from_str(symbol->string);
 992
 993         /* already an entity defined? */
 994         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 995         bool const has_body = entity->function.body != NULL;
 996         if (irentity != NULL) {
 997                 goto entity_created;
 998         }
 999
1000         ir_type *ir_type_method;
1001         if (entity->function.need_closure)
1002                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
1003         else
1004                 ir_type_method = get_ir_type(entity->declaration.type);
1005
1006         bool nested_function = false;
1007         if (owner_type == NULL)
1008                 owner_type = get_glob_type();
1009         else
1010                 nested_function = true;
1011
1012         dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
1013         irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1014
1015         ident *ld_id;
1016         if (nested_function)
1017                 ld_id = id_unique("inner.%u");
1018         else
1019                 ld_id = create_ld_ident(entity);
1020         set_entity_ld_ident(irentity, ld_id);
1021
1022         handle_decl_modifiers(irentity, entity);
1023
1024         if (! nested_function) {
1025                 storage_class_tag_t const storage_class
1026                         = (storage_class_tag_t) entity->declaration.storage_class;
1027                 if (storage_class == STORAGE_CLASS_STATIC) {
1028                     set_entity_visibility(irentity, ir_visibility_local);
1029                 } else {
1030                     set_entity_visibility(irentity, ir_visibility_external);
1031                 }
1032
1033                 bool const is_inline = entity->function.is_inline;
1034                 if (is_inline && has_body) {
1035                         if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1036                             || ((c_mode & _C99) == 0
1037                                 && storage_class == STORAGE_CLASS_EXTERN)) {
1038                                 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1039                         }
1040                 }
1041         } else {
1042                 /* nested functions are always local */
1043                 set_entity_visibility(irentity, ir_visibility_local);
1044         }
1045
1046         /* We should check for file scope here, but as long as we compile C only
1047            this is not needed. */
1048         if (!freestanding && !has_body) {
1049                 /* check for a known runtime function */
1050                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1051                         if (id != rts_idents[i])
1052                                 continue;
1053
1054                         function_type_t *function_type
1055                                 = &entity->declaration.type->function;
1056                         /* rts_entities code can't handle a "wrong" number of parameters */
1057                         if (function_type->unspecified_parameters)
1058                                 continue;
1059
1060                         /* check number of parameters */
1061                         int n_params = count_parameters(function_type);
1062                         if (n_params != rts_data[i].n_params)
1063                                 continue;
1064
1065                         type_t *return_type = skip_typeref(function_type->return_type);
1066                         int     n_res       = is_type_void(return_type) ? 0 : 1;
1067                         if (n_res != rts_data[i].n_res)
1068                                 continue;
1069
1070                         /* ignore those rts functions not necessary needed for current mode */
1071                         if ((c_mode & rts_data[i].flags) == 0)
1072                                 continue;
1073                         assert(rts_entities[rts_data[i].id] == NULL);
1074                         rts_entities[rts_data[i].id] = irentity;
1075                 }
1076         }
1077
1078         entitymap_insert(&entitymap, symbol, irentity);
1079
1080 entity_created:
1081         entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1082         entity->function.irentity = irentity;
1083
1084         return irentity;
1085 }
1086
1087 /**
1088  * Creates a SymConst for a given entity.
1089  *
1090  * @param dbgi    debug info
1091  * @param entity  the entity
1092  */
1093 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1094 {
1095         assert(entity != NULL);
1096         union symconst_symbol sym;
1097         sym.entity_p = entity;
1098         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1099 }
1100
1101 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1102 {
1103         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1104 }
1105
1106 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1107 {
1108         ir_mode *value_mode = get_irn_mode(value);
1109
1110         if (value_mode == dest_mode)
1111                 return value;
1112
1113         return new_d_Conv(dbgi, value, dest_mode);
1114 }
1115
1116 static ir_node *conv_to_storage_type(dbg_info *const dbgi, ir_node *const val, type_t *const type)
1117 {
1118         ir_mode *const mode = get_ir_mode_storage(type);
1119         return create_conv(dbgi, val, mode);
1120 }
1121
1122 /**
1123  * Creates a SymConst node representing a string constant.
1124  *
1125  * @param src_pos    the source position of the string constant
1126  * @param id_prefix  a prefix for the name of the generated string constant
1127  * @param value      the value of the string constant
1128  */
1129 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1130 {
1131         size_t            const slen        = get_string_len(value) + 1;
1132         ir_initializer_t *const initializer = create_initializer_compound(slen);
1133         ir_type          *      elem_type;
1134         switch (value->encoding) {
1135         case STRING_ENCODING_CHAR:
1136         case STRING_ENCODING_UTF8: {
1137                 elem_type = ir_type_char;
1138
1139                 ir_mode *const mode = get_type_mode(elem_type);
1140                 char const    *p    = value->begin;
1141                 for (size_t i = 0; i < slen; ++i) {
1142                         ir_tarval        *tv  = new_tarval_from_long(*p++, mode);
1143                         ir_initializer_t *val = create_initializer_tarval(tv);
1144                         set_initializer_compound_value(initializer, i, val);
1145                 }
1146                 goto finish;
1147         }
1148
1149         {
1150                 type_t *type;
1151         case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1152         case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1153         case STRING_ENCODING_WIDE:   type = type_wchar_t;  goto init_wide;
1154 init_wide:;
1155                 elem_type = get_ir_type(type);
1156
1157                 ir_mode *const mode = get_type_mode(elem_type);
1158                 char const    *p    = value->begin;
1159                 for (size_t i = 0; i < slen; ++i) {
1160                         assert(p <= value->begin + value->size);
1161                         utf32             v   = read_utf8_char(&p);
1162                         ir_tarval        *tv  = new_tarval_from_long(v, mode);
1163                         ir_initializer_t *val = create_initializer_tarval(tv);
1164                         set_initializer_compound_value(initializer, i, val);
1165                 }
1166                 goto finish;
1167         }
1168         }
1169         panic("invalid string encoding");
1170
1171 finish:;
1172         ir_type *const type = new_type_array(1, elem_type);
1173         set_array_bounds_int(type, 0, 0, slen);
1174         set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1175         set_type_state(      type, layout_fixed);
1176
1177         ir_type   *const global_type = get_glob_type();
1178         ident     *const id          = id_unique(id_prefix);
1179         dbg_info  *const dbgi        = get_dbg_info(src_pos);
1180         ir_entity *const entity      = new_d_entity(global_type, id, type, dbgi);
1181         set_entity_ld_ident(   entity, id);
1182         set_entity_visibility( entity, ir_visibility_private);
1183         add_entity_linkage(    entity, IR_LINKAGE_CONSTANT);
1184         set_entity_initializer(entity, initializer);
1185
1186         return create_symconst(dbgi, entity);
1187 }
1188
1189 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1190 {
1191         assert(type->kind == TYPE_ATOMIC || type->kind == TYPE_COMPLEX);
1192         atomic_type_kind_t akind = type->atomic.akind;
1193
1194         ir_mode    *const mode = atomic_modes[akind];
1195         char const *const str  = literal->value.begin;
1196         ir_tarval  *const tv   = new_tarval_from_str(str, literal->suffix - str, mode);
1197         if (tv == tarval_bad)
1198                 return false;
1199
1200         literal->base.type    = type;
1201         literal->target_value = tv;
1202         return true;
1203 }
1204
1205 void determine_literal_type(literal_expression_t *const literal)
1206 {
1207         assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1208
1209         /* -1: signed only, 0: any, 1: unsigned only */
1210         int const sign =
1211                 !is_type_signed(literal->base.type) ? 1 :
1212                 literal->value.begin[0] == '0'      ? 0 :
1213                 -1; /* Decimal literals only try signed types. */
1214
1215         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1216         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1217
1218         if (try_create_integer(literal, literal->base.type))
1219                 goto finished;
1220
1221         /* now try if the constant is small enough for some types */
1222         if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1223                 goto finished;
1224         if (sign <= 0 && try_create_integer(literal, type_long))
1225                 goto finished;
1226         if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1227                 goto finished;
1228         /* last try? then we should not report tarval_bad */
1229         if (sign < 0)
1230                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1231         if (sign <= 0 && try_create_integer(literal, type_long_long))
1232                 goto finished;
1233
1234         /* last try */
1235         assert(sign >= 0);
1236         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1237         bool res = try_create_integer(literal, type_unsigned_long_long);
1238         if (!res)
1239                 panic("internal error when parsing number literal");
1240
1241 finished:
1242         tarval_set_integer_overflow_mode(old_mode);
1243 }
1244
1245 /**
1246  * Creates a Const node representing a constant.
1247  */
1248 static ir_node *literal_to_firm_(const literal_expression_t *literal,
1249                                  ir_mode *mode)
1250 {
1251         const char *string = literal->value.begin;
1252         size_t      size   = literal->value.size;
1253         ir_tarval  *tv;
1254
1255         switch (literal->base.kind) {
1256         case EXPR_LITERAL_INTEGER:
1257                 assert(literal->target_value != NULL);
1258                 tv = literal->target_value;
1259                 break;
1260
1261         case EXPR_LITERAL_FLOATINGPOINT:
1262                 tv = new_tarval_from_str(string, size, mode);
1263                 break;
1264
1265         case EXPR_LITERAL_BOOLEAN:
1266                 if (string[0] == 't') {
1267                         tv = get_mode_one(mode);
1268                 } else {
1269                         assert(string[0] == 'f');
1270         case EXPR_LITERAL_MS_NOOP:
1271                         tv = get_mode_null(mode);
1272                 }
1273                 break;
1274
1275         default:
1276                 panic("invalid literal kind");
1277         }
1278
1279         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1280         return new_d_Const(dbgi, tv);
1281 }
1282
1283 static ir_node *literal_to_firm(const literal_expression_t *literal)
1284 {
1285         type_t  *type         = skip_typeref(literal->base.type);
1286         ir_mode *mode_storage = get_ir_mode_storage(type);
1287         return literal_to_firm_(literal, mode_storage);
1288 }
1289
1290 /**
1291  * Creates a Const node representing a character constant.
1292  */
1293 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1294 {
1295         type_t     *type   = skip_typeref(literal->base.type);
1296         ir_mode    *mode   = get_ir_mode_storage(type);
1297         const char *string = literal->value.begin;
1298         size_t      size   = literal->value.size;
1299         ir_tarval  *tv;
1300
1301         switch (literal->value.encoding) {
1302         case STRING_ENCODING_WIDE: {
1303                 utf32  v = read_utf8_char(&string);
1304                 char   buf[128];
1305                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1306
1307                 tv = new_tarval_from_str(buf, len, mode);
1308                 break;
1309         }
1310
1311         case STRING_ENCODING_CHAR: {
1312                 long long int v;
1313                 bool char_is_signed
1314                         = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1315                 if (size == 1 && char_is_signed) {
1316                         v = (signed char)string[0];
1317                 } else {
1318                         v = 0;
1319                         for (size_t i = 0; i < size; ++i) {
1320                                 v = (v << 8) | ((unsigned char)string[i]);
1321                         }
1322                 }
1323                 char   buf[128];
1324                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1325
1326                 tv = new_tarval_from_str(buf, len, mode);
1327                 break;
1328         }
1329
1330         default:
1331                 panic("invalid literal kind");
1332         }
1333
1334         dbg_info *const dbgi = get_dbg_info(&literal->base.pos);
1335         return new_d_Const(dbgi, tv);
1336 }
1337
1338 /*
1339  * Allocate an area of size bytes aligned at alignment
1340  * at a frame type.
1341  */
1342 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1343 {
1344         static unsigned area_cnt = 0;
1345         char buf[32];
1346
1347         ir_type *tp = new_type_array(1, ir_type_char);
1348         set_array_bounds_int(tp, 0, 0, size);
1349         set_type_alignment_bytes(tp, alignment);
1350
1351         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1352         ident *name = new_id_from_str(buf);
1353         ir_entity *area = new_entity(frame_type, name, tp);
1354
1355         /* mark this entity as compiler generated */
1356         set_entity_compiler_generated(area, 1);
1357         return area;
1358 }
1359
1360 /**
1361  * Return a node representing a trampoline region
1362  * for a given function entity.
1363  *
1364  * @param dbgi    debug info
1365  * @param entity  the function entity
1366  */
1367 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1368 {
1369         ir_entity *region = NULL;
1370         int        i;
1371
1372         if (current_trampolines != NULL) {
1373                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1374                         if (current_trampolines[i].function == entity) {
1375                                 region = current_trampolines[i].region;
1376                                 break;
1377                         }
1378                 }
1379         } else {
1380                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1381         }
1382         ir_graph *irg = current_ir_graph;
1383         if (region == NULL) {
1384                 /* create a new region */
1385                 ir_type           *frame_tp = get_irg_frame_type(irg);
1386                 trampoline_region  reg;
1387                 reg.function = entity;
1388
1389                 reg.region   = alloc_trampoline(frame_tp,
1390                                                 be_params->trampoline_size,
1391                                                 be_params->trampoline_align);
1392                 ARR_APP1(trampoline_region, current_trampolines, reg);
1393                 region = reg.region;
1394         }
1395         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1396                                region);
1397 }
1398
1399 /**
1400  * Creates a trampoline for a function represented by an entity.
1401  *
1402  * @param dbgi    debug info
1403  * @param mode    the (reference) mode for the function address
1404  * @param entity  the function entity
1405  */
1406 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1407                                   ir_entity *entity)
1408 {
1409         assert(entity != NULL);
1410         ir_node *in[3];
1411         in[0] = get_trampoline_region(dbgi, entity);
1412         in[1] = create_symconst(dbgi, entity);
1413         in[2] = get_irg_frame(current_ir_graph);
1414
1415         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1416         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1417         return new_Proj(irn, mode, pn_Builtin_max+1);
1418 }
1419
1420 /**
1421  * Dereference an address.
1422  *
1423  * @param dbgi  debug info
1424  * @param type  the type of the dereferenced result (the points_to type)
1425  * @param addr  the address to dereference
1426  */
1427 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1428                                       ir_node *const addr)
1429 {
1430         type_t *skipped = skip_typeref(type);
1431         if (is_type_incomplete(skipped))
1432                 return addr;
1433
1434         ir_type *irtype = get_ir_type(skipped);
1435         if (is_compound_type(irtype)
1436             || is_Method_type(irtype)
1437             || is_Array_type(irtype)) {
1438                 return addr;
1439         }
1440
1441         ir_cons_flags  flags    = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1442                                   ? cons_volatile : cons_none;
1443         ir_mode *const mode     = get_type_mode(irtype);
1444         ir_node *const memory   = get_store();
1445         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1446         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1447         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1448
1449         set_store(load_mem);
1450         return load_res;
1451 }
1452
1453 /**
1454  * Returns the correct base address depending on whether it is a parameter or a
1455  * normal local variable.
1456  */
1457 static ir_node *get_local_frame(ir_entity *const ent)
1458 {
1459         ir_graph      *const irg   = current_ir_graph;
1460         const ir_type *const owner = get_entity_owner(ent);
1461         if (owner == current_outer_frame) {
1462                 assert(current_static_link != NULL);
1463                 return current_static_link;
1464         } else {
1465                 return get_irg_frame(irg);
1466         }
1467 }
1468
1469 /**
1470  * Keep the current block and memory.
1471  * This is necessary for all loops, because they could become infinite.
1472  */
1473 static void keep_loop(void)
1474 {
1475         keep_alive(get_cur_block());
1476         keep_alive(get_store());
1477 }
1478
1479 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1480 {
1481         entity_t *entity = ref->entity;
1482         if (entity->enum_value.tv == NULL) {
1483                 type_t *type = skip_typeref(entity->enum_value.enum_type);
1484                 assert(type->kind == TYPE_ENUM);
1485                 determine_enum_values(&type->enumt);
1486         }
1487
1488         return new_Const(entity->enum_value.tv);
1489 }
1490
1491 static ir_node *reference_addr(const reference_expression_t *ref)
1492 {
1493         dbg_info *dbgi   = get_dbg_info(&ref->base.pos);
1494         entity_t *entity = ref->entity;
1495         assert(is_declaration(entity));
1496
1497         if (entity->kind == ENTITY_FUNCTION
1498             && entity->function.btk != BUILTIN_NONE) {
1499                 ir_entity *irentity = get_function_entity(entity, NULL);
1500                 /* for gcc compatibility we have to produce (dummy) addresses for some
1501                  * builtins which don't have entities */
1502                 if (irentity == NULL) {
1503                         position_t const *const pos = &ref->base.pos;
1504                         warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1505
1506                         /* simply create a NULL pointer */
1507                         ir_mode *const mode = get_ir_mode_storage(type_void_ptr);
1508                         return new_Const(get_mode_null(mode));
1509                 }
1510         }
1511
1512         switch ((declaration_kind_t) entity->declaration.kind) {
1513         case DECLARATION_KIND_UNKNOWN:
1514                 break;
1515         case DECLARATION_KIND_PARAMETER:
1516         case DECLARATION_KIND_LOCAL_VARIABLE:
1517                 /* you can store to a local variable (so we don't panic but return NULL
1518                  * as an indicator for no real address) */
1519                 return NULL;
1520         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1521                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1522                 return addr;
1523         }
1524
1525         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1526         case DECLARATION_KIND_PARAMETER_ENTITY: {
1527                 ir_entity *irentity = entity->variable.v.entity;
1528                 ir_node   *frame    = get_local_frame(irentity);
1529                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1530                 return sel;
1531         }
1532
1533         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1534                 return entity->variable.v.vla_base;
1535
1536         case DECLARATION_KIND_FUNCTION: {
1537                 return create_symconst(dbgi, entity->function.irentity);
1538         }
1539
1540         case DECLARATION_KIND_INNER_FUNCTION: {
1541                 type_t  *const type = skip_typeref(entity->declaration.type);
1542                 ir_mode *const mode = get_ir_mode_storage(type);
1543                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1544                         /* inner function not using the closure */
1545                         return create_symconst(dbgi, entity->function.irentity);
1546                 } else {
1547                         /* need trampoline here */
1548                         return create_trampoline(dbgi, mode, entity->function.irentity);
1549                 }
1550         }
1551
1552         case DECLARATION_KIND_COMPOUND_MEMBER:
1553                 panic("not implemented reference type");
1554         }
1555
1556         panic("reference to declaration with unknown type");
1557 }
1558
1559 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1560 {
1561         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
1562         entity_t *const entity = ref->entity;
1563         assert(is_declaration(entity));
1564
1565         switch ((declaration_kind_t)entity->declaration.kind) {
1566         case DECLARATION_KIND_LOCAL_VARIABLE:
1567         case DECLARATION_KIND_PARAMETER: {
1568                 type_t  *const type  = skip_typeref(entity->declaration.type);
1569                 ir_mode *const mode  = get_ir_mode_storage(type);
1570                 return get_value(entity->variable.v.value_number, mode);
1571         }
1572
1573         default: {
1574                 ir_node *const addr = reference_addr(ref);
1575                 return deref_address(dbgi, entity->declaration.type, addr);
1576         }
1577         }
1578 }
1579
1580 /**
1581  * Transform calls to builtin functions.
1582  */
1583 static ir_node *process_builtin_call(const call_expression_t *call)
1584 {
1585         dbg_info *dbgi = get_dbg_info(&call->base.pos);
1586
1587         assert(call->function->kind == EXPR_REFERENCE);
1588         reference_expression_t *builtin = &call->function->reference;
1589
1590         type_t *expr_type = skip_typeref(builtin->base.type);
1591         assert(is_type_pointer(expr_type));
1592
1593         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1594
1595         switch (builtin->entity->function.btk) {
1596         case BUILTIN_NONE:
1597                 break;
1598         case BUILTIN_ALLOCA: {
1599                 expression_t *argument = call->arguments->expression;
1600                 ir_node      *size     = expression_to_value(argument);
1601
1602                 ir_node *store  = get_store();
1603                 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1604                                               stack_alloc);
1605                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1606                 set_store(proj_m);
1607                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1608
1609                 return res;
1610         }
1611         case BUILTIN_INF: {
1612                 type_t    *type = function_type->function.return_type;
1613                 ir_mode   *mode = get_ir_mode_storage(type);
1614                 ir_tarval *tv   = get_mode_infinite(mode);
1615                 ir_node   *res  = new_d_Const(dbgi, tv);
1616                 return res;
1617         }
1618         case BUILTIN_NAN: {
1619                 /* Ignore string for now... */
1620                 assert(is_type_function(function_type));
1621                 type_t    *type = function_type->function.return_type;
1622                 ir_mode   *mode = get_ir_mode_storage(type);
1623                 ir_tarval *tv   = get_mode_NAN(mode);
1624                 ir_node   *res  = new_d_Const(dbgi, tv);
1625                 return res;
1626         }
1627         case BUILTIN_EXPECT: {
1628                 expression_t *argument = call->arguments->expression;
1629                 return expression_to_value(argument);
1630         }
1631         case BUILTIN_VA_END:
1632                 /* evaluate the argument of va_end for its side effects */
1633                 expression_to_value(call->arguments->expression);
1634                 return NULL;
1635         case BUILTIN_OBJECT_SIZE: {
1636                 /* determine value of "type" */
1637                 expression_t *type_expression = call->arguments->next->expression;
1638                 long          type_val        = fold_constant_to_int(type_expression);
1639                 type_t       *type            = function_type->function.return_type;
1640                 ir_mode      *mode            = get_ir_mode_storage(type);
1641                 /* just produce a "I don't know" result */
1642                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1643                                                 get_mode_minus_one(mode);
1644
1645                 return new_d_Const(dbgi, result);
1646         }
1647         case BUILTIN_ROTL: {
1648                 ir_node *val  = expression_to_value(call->arguments->expression);
1649                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1650                 ir_mode *mode = get_irn_mode(val);
1651                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1652                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1653         }
1654         case BUILTIN_ROTR: {
1655                 ir_node *val  = expression_to_value(call->arguments->expression);
1656                 ir_node *shf  = expression_to_value(call->arguments->next->expression);
1657                 ir_mode *mode = get_irn_mode(val);
1658                 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1659                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1660                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1661                 return new_d_Rotl(dbgi, val, sub, mode);
1662         }
1663         case BUILTIN_FIRM:
1664                 break;
1665         case BUILTIN_LIBC:
1666         case BUILTIN_LIBC_CHECK:
1667                 panic("builtin did not produce an entity");
1668         }
1669         panic("invalid builtin");
1670 }
1671
1672 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
1673                                   complex_value value);
1674
1675 /**
1676  * Transform a call expression.
1677  * Handles some special cases, like alloca() calls, which must be resolved
1678  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1679  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1680  * handled right...
1681  */
1682 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1683 {
1684         dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1685         assert(currently_reachable());
1686
1687         expression_t   *function = call->function;
1688         ir_node        *callee   = NULL;
1689         bool            firm_builtin = false;
1690         ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1691         if (function->kind == EXPR_REFERENCE) {
1692                 const reference_expression_t *ref    = &function->reference;
1693                 entity_t                     *entity = ref->entity;
1694
1695                 if (entity->kind == ENTITY_FUNCTION) {
1696                         builtin_kind_t builtin = entity->function.btk;
1697                         if (builtin == BUILTIN_FIRM) {
1698                                 firm_builtin = true;
1699                                 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1700                         } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1701                                    && builtin != BUILTIN_LIBC_CHECK) {
1702                                 return process_builtin_call(call);
1703                         }
1704                 }
1705         }
1706         if (!firm_builtin)
1707                 callee = expression_to_value(function);
1708
1709         type_t *type = skip_typeref(function->base.type);
1710         assert(is_type_pointer(type));
1711         pointer_type_t *pointer_type = &type->pointer;
1712         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1713         assert(is_type_function(points_to));
1714         function_type_t *function_type = &points_to->function;
1715
1716         int      n_parameters    = 0;
1717         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1718         ir_type *new_method_type = NULL;
1719         if (function_type->variadic || function_type->unspecified_parameters) {
1720                 const call_argument_t *argument = call->arguments;
1721                 for ( ; argument != NULL; argument = argument->next) {
1722                         ++n_parameters;
1723                 }
1724
1725                 /* we need to construct a new method type matching the call
1726                  * arguments... */
1727                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1728                 int n_res       = get_method_n_ress(ir_method_type);
1729                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1730                 set_method_calling_convention(new_method_type,
1731                                get_method_calling_convention(ir_method_type));
1732                 set_method_additional_properties(new_method_type,
1733                                get_method_additional_properties(ir_method_type));
1734                 set_method_variadicity(new_method_type,
1735                                        get_method_variadicity(ir_method_type));
1736
1737                 for (int i = 0; i < n_res; ++i) {
1738                         set_method_res_type(new_method_type, i,
1739                                             get_method_res_type(ir_method_type, i));
1740                 }
1741                 argument = call->arguments;
1742                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1743                         expression_t *expression = argument->expression;
1744                         ir_type      *irtype     = get_ir_type(expression->base.type);
1745                         set_method_param_type(new_method_type, i, irtype);
1746                 }
1747                 ir_method_type = new_method_type;
1748         } else {
1749                 n_parameters = get_method_n_params(ir_method_type);
1750         }
1751
1752         ir_node *in[n_parameters];
1753
1754         const call_argument_t *argument = call->arguments;
1755         for (int n = 0; n < n_parameters; ++n) {
1756                 expression_t *expression = argument->expression;
1757                 type_t *const arg_type = skip_typeref(expression->base.type);
1758                 if (is_type_complex(arg_type)) {
1759                         complex_value value = expression_to_complex(expression);
1760                         in[n] = complex_to_memory(dbgi, arg_type, value);
1761                 } else {
1762                         in[n] = conv_to_storage_type(dbgi, expression_to_value(expression), arg_type);
1763                 }
1764
1765                 argument = argument->next;
1766         }
1767
1768         ir_node *store;
1769         if (function_type->modifiers & DM_CONST) {
1770                 store = get_irg_no_mem(current_ir_graph);
1771         } else {
1772                 store = get_store();
1773         }
1774
1775         ir_node *node;
1776         type_t  *return_type = skip_typeref(function_type->return_type);
1777         ir_node *result      = NULL;
1778         if (firm_builtin) {
1779                 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1780                                      ir_method_type);
1781                 if (! (function_type->modifiers & DM_CONST)) {
1782                         ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1783                         set_store(mem);
1784                 }
1785
1786                 if (!is_type_void(return_type)) {
1787                         assert(is_type_scalar(return_type));
1788                         ir_mode *mode = get_ir_mode_storage(return_type);
1789                         result = new_Proj(node, mode, pn_Builtin_max+1);
1790                 }
1791         } else {
1792                 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1793                 if (! (function_type->modifiers & DM_CONST)) {
1794                         ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1795                         set_store(mem);
1796                 }
1797
1798                 if (!is_type_void(return_type)) {
1799                         ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1800                         ir_mode *const mode    = get_ir_mode_storage(return_type);
1801                         result                 = new_Proj(resproj, mode, 0);
1802                 }
1803         }
1804
1805         if (function_type->modifiers & DM_NORETURN) {
1806                 /* A dead end:  Keep the Call and the Block.  Also place all further
1807                  * nodes into a new and unreachable block. */
1808                 keep_alive(node);
1809                 keep_alive(get_cur_block());
1810                 ir_node *block = new_Block(0, NULL);
1811                 set_cur_block(block);
1812         }
1813
1814         return result;
1815 }
1816
1817 static ir_node *statement_to_firm(statement_t *statement);
1818 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1819 static ir_node *expression_to_addr(const expression_t *expression);
1820
1821 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1822                          ir_node *value)
1823 {
1824         value = conv_to_storage_type(dbgi, value, type);
1825
1826         ir_node *memory = get_store();
1827
1828         if (is_type_scalar(type) && !is_type_complex(type)) {
1829                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1830                                       ? cons_volatile : cons_none;
1831                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1832                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1833                 set_store(store_mem);
1834         } else {
1835                 ir_type *irtype    = get_ir_type(type);
1836                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1837                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1838                 set_store(copyb_mem);
1839         }
1840 }
1841
1842 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1843 {
1844         ir_tarval *all_one   = get_mode_all_one(mode);
1845         int        mode_size = get_mode_size_bits(mode);
1846         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1847
1848         assert(offset >= 0);
1849         assert(size   >= 0);
1850         assert(offset + size <= mode_size);
1851         if (size == mode_size) {
1852                 return all_one;
1853         }
1854
1855         long       shiftr    = get_mode_size_bits(mode) - size;
1856         long       shiftl    = offset;
1857         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1858         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1859         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1860         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1861
1862         return mask1;
1863 }
1864
1865 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1866                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1867                 bool need_return)
1868 {
1869         ir_type *entity_type = get_entity_type(entity);
1870         ir_type *base_type   = get_primitive_base_type(entity_type);
1871         ir_mode *mode        = get_type_mode(base_type);
1872         ir_mode *mode_uint   = atomic_modes[ATOMIC_TYPE_UINT];
1873
1874         value = create_conv(dbgi, value, mode);
1875
1876         /* kill upper bits of value and shift to right position */
1877         unsigned  bitoffset  = get_entity_offset_bits_remainder(entity);
1878         unsigned  bitsize    = get_mode_size_bits(get_type_mode(entity_type));
1879         unsigned  base_bits  = get_mode_size_bits(mode);
1880         unsigned  shiftwidth = base_bits - bitsize;
1881
1882         ir_node  *shiftcount = new_Const_long(mode_uint, shiftwidth);
1883         ir_node  *shiftl     = new_d_Shl(dbgi, value, shiftcount, mode);
1884
1885         unsigned  shrwidth   = base_bits - bitsize - bitoffset;
1886         ir_node  *shrconst   = new_Const_long(mode_uint, shrwidth);
1887         ir_node  *shiftr     = new_d_Shr(dbgi, shiftl, shrconst, mode);
1888
1889         /* load current value */
1890         ir_node   *mem             = get_store();
1891         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
1892                                           set_volatile ? cons_volatile : cons_none);
1893         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1894         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1895         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1896         ir_tarval *inv_mask        = tarval_not(shift_mask);
1897         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1898         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1899
1900         /* construct new value and store */
1901         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1902         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1903                                          set_volatile ? cons_volatile : cons_none);
1904         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1905         set_store(store_mem);
1906
1907         if (!need_return)
1908                 return NULL;
1909
1910         ir_node *res_shr;
1911         ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1912         if (mode_is_signed(mode)) {
1913                 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1914         } else {
1915                 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1916         }
1917         return res_shr;
1918 }
1919
1920 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1921                                          ir_node *addr)
1922 {
1923         dbg_info *dbgi      = get_dbg_info(&expression->base.pos);
1924         entity_t *entity    = expression->compound_entry;
1925         type_t   *base_type = entity->declaration.type;
1926         ir_mode  *mode      = get_ir_mode_storage(base_type);
1927         ir_node  *mem       = get_store();
1928         ir_node  *load      = new_d_Load(dbgi, mem, addr, mode, cons_none);
1929         ir_node  *load_mem  = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1930         ir_node  *load_res  = new_d_Proj(dbgi, load, mode, pn_Load_res);
1931         ir_mode  *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1932
1933         ir_mode  *amode     = mode;
1934         /* optimisation, since shifting in modes < machine_size is usually
1935          * less efficient */
1936         if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1937                 amode = mode_uint;
1938         }
1939         unsigned amode_size = get_mode_size_bits(amode);
1940         load_res = create_conv(dbgi, load_res, amode);
1941
1942         set_store(load_mem);
1943
1944         /* kill upper bits */
1945         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1946         unsigned   bitoffset   = entity->compound_member.bit_offset;
1947         unsigned   bitsize     = entity->compound_member.bit_size;
1948         unsigned   shift_bitsl = amode_size - bitoffset - bitsize;
1949         ir_tarval *tvl         = new_tarval_from_long((long)shift_bitsl, mode_uint);
1950         ir_node   *countl      = new_d_Const(dbgi, tvl);
1951         ir_node   *shiftl      = new_d_Shl(dbgi, load_res, countl, amode);
1952
1953         unsigned   shift_bitsr = bitoffset + shift_bitsl;
1954         assert(shift_bitsr <= amode_size);
1955         ir_tarval *tvr         = new_tarval_from_long((long)shift_bitsr, mode_uint);
1956         ir_node   *countr      = new_d_Const(dbgi, tvr);
1957         ir_node   *shiftr;
1958         if (mode_is_signed(mode)) {
1959                 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1960         } else {
1961                 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1962         }
1963
1964         return conv_to_storage_type(dbgi, shiftr, expression->base.type);
1965 }
1966
1967 /* make sure the selected compound type is constructed */
1968 static void construct_select_compound(const select_expression_t *expression)
1969 {
1970         type_t *type = skip_typeref(expression->compound->base.type);
1971         if (is_type_pointer(type)) {
1972                 type = type->pointer.points_to;
1973         }
1974         (void) get_ir_type(type);
1975 }
1976
1977 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1978                                               ir_node *value, ir_node *addr)
1979 {
1980         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1981         type_t   *type = skip_typeref(expression->base.type);
1982         value = conv_to_storage_type(dbgi, value, type);
1983
1984         if (expression->kind == EXPR_REFERENCE) {
1985                 const reference_expression_t *ref = &expression->reference;
1986
1987                 entity_t *entity = ref->entity;
1988                 assert(is_declaration(entity));
1989                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1990                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
1991                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1992                         set_value(entity->variable.v.value_number, value);
1993                         return value;
1994                 }
1995         }
1996
1997         if (addr == NULL)
1998                 addr = expression_to_addr(expression);
1999         assert(addr != NULL);
2000
2001         if (expression->kind == EXPR_SELECT) {
2002                 const select_expression_t *select = &expression->select;
2003
2004                 construct_select_compound(select);
2005
2006                 entity_t *entity = select->compound_entry;
2007                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2008                 if (entity->compound_member.bitfield) {
2009                         ir_entity *irentity = entity->compound_member.entity;
2010                         bool       set_volatile
2011                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2012                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2013                                                        set_volatile, true);
2014                         return value;
2015                 }
2016         }
2017
2018         assign_value(dbgi, addr, type, value);
2019         return value;
2020 }
2021
2022 static ir_node *get_value_from_lvalue(const expression_t *expression,
2023                                       ir_node *addr)
2024 {
2025         if (expression->kind == EXPR_REFERENCE) {
2026                 const reference_expression_t *ref = &expression->reference;
2027
2028                 entity_t *entity = ref->entity;
2029                 assert(entity->kind == ENTITY_VARIABLE
2030                                 || entity->kind == ENTITY_PARAMETER);
2031                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2032                 int value_number;
2033                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2034                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2035                         value_number = entity->variable.v.value_number;
2036                         assert(addr == NULL);
2037                         type_t  *type = skip_typeref(expression->base.type);
2038                         ir_mode *mode = get_ir_mode_storage(type);
2039                         return get_value(value_number, mode);
2040                 }
2041         }
2042
2043         assert(addr != NULL);
2044         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2045
2046         ir_node *value;
2047         if (expression->kind == EXPR_SELECT &&
2048             expression->select.compound_entry->compound_member.bitfield) {
2049             construct_select_compound(&expression->select);
2050                 value = bitfield_extract_to_firm(&expression->select, addr);
2051         } else {
2052                 value = deref_address(dbgi, expression->base.type, addr);
2053         }
2054
2055         return value;
2056 }
2057
2058 static ir_node *incdec_to_firm(unary_expression_t const *const expr, bool const inc, bool const pre)
2059 {
2060         type_t  *const type = skip_typeref(expr->base.type);
2061         ir_mode *const mode = get_ir_mode_arithmetic(type);
2062
2063         ir_node *offset;
2064         if (is_type_pointer(type)) {
2065                 offset = get_type_size_node(type->pointer.points_to);
2066         } else {
2067                 assert(is_type_arithmetic(type));
2068                 offset = new_Const(get_mode_one(mode));
2069         }
2070
2071         dbg_info           *const dbgi        = get_dbg_info(&expr->base.pos);
2072         expression_t const *const value_expr  = expr->value;
2073         ir_node            *const addr        = expression_to_addr(value_expr);
2074         ir_node            *const value       = get_value_from_lvalue(value_expr, addr);
2075         ir_node            *const value_arith = create_conv(dbgi, value, mode);
2076         ir_node            *const new_value   = inc
2077                 ? new_d_Add(dbgi, value_arith, offset, mode)
2078                 : new_d_Sub(dbgi, value_arith, offset, mode);
2079
2080         ir_node *const store_value = set_value_for_expression_addr(value_expr, new_value, addr);
2081         return pre ? store_value : value;
2082 }
2083
2084 static bool is_local_variable(expression_t *expression)
2085 {
2086         if (expression->kind != EXPR_REFERENCE)
2087                 return false;
2088         reference_expression_t *ref_expr = &expression->reference;
2089         entity_t               *entity   = ref_expr->entity;
2090         if (entity->kind != ENTITY_VARIABLE)
2091                 return false;
2092         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2093         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2094 }
2095
2096 static ir_relation get_relation(const expression_kind_t kind)
2097 {
2098         switch (kind) {
2099         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2100         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2101         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2102         case EXPR_BINARY_ISLESS:
2103         case EXPR_BINARY_LESS:          return ir_relation_less;
2104         case EXPR_BINARY_ISLESSEQUAL:
2105         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2106         case EXPR_BINARY_ISGREATER:
2107         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2108         case EXPR_BINARY_ISGREATEREQUAL:
2109         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2110         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2111
2112         default:
2113                 break;
2114         }
2115         panic("trying to get ir_relation from non-comparison binexpr type");
2116 }
2117
2118 /**
2119  * Handle the assume optimizer hint: check if a Confirm
2120  * node can be created.
2121  *
2122  * @param dbi    debug info
2123  * @param expr   the IL assume expression
2124  *
2125  * we support here only some simple cases:
2126  *  - var rel const
2127  *  - const rel val
2128  *  - var rel var
2129  */
2130 static ir_node *handle_assume_compare(dbg_info *dbi,
2131                                       const binary_expression_t *expression)
2132 {
2133         expression_t *op1 = expression->left;
2134         expression_t *op2 = expression->right;
2135         entity_t     *var2, *var = NULL;
2136         ir_node      *res      = NULL;
2137         ir_relation   relation = get_relation(expression->base.kind);
2138
2139         if (is_local_variable(op1) && is_local_variable(op2)) {
2140                 var  = op1->reference.entity;
2141             var2 = op2->reference.entity;
2142
2143                 type_t  *const type = skip_typeref(var->declaration.type);
2144                 ir_mode *const mode = get_ir_mode_storage(type);
2145
2146                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2147                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2148
2149                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2150                 set_value(var2->variable.v.value_number, res);
2151
2152                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2153                 set_value(var->variable.v.value_number, res);
2154
2155                 return res;
2156         }
2157
2158         expression_t *con = NULL;
2159         if (is_local_variable(op1) && is_constant_expression(op2) != EXPR_CLASS_VARIABLE) {
2160                 var = op1->reference.entity;
2161                 con = op2;
2162         } else if (is_constant_expression(op1) != EXPR_CLASS_VARIABLE && is_local_variable(op2)) {
2163                 relation = get_inversed_relation(relation);
2164                 var = op2->reference.entity;
2165                 con = op1;
2166         }
2167
2168         if (var != NULL) {
2169                 type_t  *const type = skip_typeref(var->declaration.type);
2170                 ir_mode *const mode = get_ir_mode_storage(type);
2171
2172                 res = get_value(var->variable.v.value_number, mode);
2173                 res = new_d_Confirm(dbi, res, expression_to_value(con), relation);
2174                 set_value(var->variable.v.value_number, res);
2175         }
2176         return res;
2177 }
2178
2179 /**
2180  * Handle the assume optimizer hint.
2181  *
2182  * @param dbi    debug info
2183  * @param expr   the IL assume expression
2184  */
2185 static ir_node *handle_assume(expression_t const *const expr)
2186 {
2187         switch (expr->kind) {
2188         case EXPR_BINARY_EQUAL:
2189         case EXPR_BINARY_NOTEQUAL:
2190         case EXPR_BINARY_LESS:
2191         case EXPR_BINARY_LESSEQUAL:
2192         case EXPR_BINARY_GREATER:
2193         case EXPR_BINARY_GREATEREQUAL: {
2194                 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2195                 return handle_assume_compare(dbgi, &expr->binary);
2196         }
2197
2198         default:
2199                 return NULL;
2200         }
2201 }
2202
2203 static ir_node *create_cast(unary_expression_t const *const expr)
2204 {
2205         type_t  *const from_type = skip_typeref(expr->value->base.type);
2206         ir_node       *value     = is_type_complex(from_type)
2207                 ? expression_to_complex(expr->value).real
2208                 : expression_to_value(expr->value);
2209
2210         type_t *const type = skip_typeref(expr->base.type);
2211         if (is_type_void(type))
2212                 return NULL;
2213
2214         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2215         ir_mode  *const mode = get_ir_mode_storage(type);
2216         /* check for conversion from / to __based types */
2217         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2218                 const variable_t *from_var = from_type->pointer.base_variable;
2219                 const variable_t *to_var   = type->pointer.base_variable;
2220                 if (from_var != to_var) {
2221                         if (from_var != NULL) {
2222                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2223                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2224                                 value = new_d_Add(dbgi, value, base, mode);
2225                         }
2226                         if (to_var != NULL) {
2227                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2228                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2229                                 value = new_d_Sub(dbgi, value, base, mode);
2230                         }
2231                 }
2232         }
2233
2234         return create_conv(dbgi, value, mode);
2235 }
2236
2237 static ir_node *complement_to_firm(unary_expression_t const *const expr)
2238 {
2239         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2240         type_t   *const type  = skip_typeref(expr->base.type);
2241         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2242         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2243         return new_d_Not(dbgi, value, mode);
2244 }
2245
2246 static ir_node *dereference_to_firm(unary_expression_t const *const expr)
2247 {
2248         dbg_info *const dbgi       = get_dbg_info(&expr->base.pos);
2249         ir_node        *value      = expression_to_value(expr->value);
2250         type_t   *const value_type = skip_typeref(expr->value->base.type);
2251         assert(is_type_pointer(value_type));
2252
2253         /* check for __based */
2254         variable_t const *const base_var = value_type->pointer.base_variable;
2255         if (base_var) {
2256                 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2257                 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2258                 value = new_d_Add(dbgi, value, base, get_ir_mode_storage(value_type));
2259         }
2260         type_t *const points_to = value_type->pointer.points_to;
2261         return deref_address(dbgi, points_to, value);
2262 }
2263
2264 static ir_node *negate_to_firm(unary_expression_t const *const expr)
2265 {
2266         dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
2267         type_t   *const type  = skip_typeref(expr->base.type);
2268         ir_mode  *const mode  = get_ir_mode_arithmetic(type);
2269         ir_node  *const value = create_conv(dbgi, expression_to_value(expr->value), mode);
2270         return new_d_Minus(dbgi, value, mode);
2271 }
2272
2273 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2274                 ir_node *value, type_t *type)
2275 {
2276         ir_mode        *const mode         = get_ir_mode_storage(type_ptrdiff_t);
2277         assert(is_type_pointer(type));
2278         pointer_type_t *const pointer_type = &type->pointer;
2279         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2280         ir_node        *      elem_size    = get_type_size_node(points_to);
2281         elem_size                          = create_conv(dbgi, elem_size, mode);
2282         value                              = create_conv(dbgi, value,     mode);
2283         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2284         return mul;
2285 }
2286
2287 static ir_node *create_div(dbg_info *dbgi, ir_node *left, ir_node *right,
2288                            ir_mode *mode)
2289 {
2290         ir_node *pin = new_Pin(new_NoMem());
2291         ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2292                                  op_pin_state_floats);
2293         return new_d_Proj(dbgi, op, mode, pn_Div_res);
2294 }
2295
2296 static ir_node *create_op(binary_expression_t const *const expr, ir_node *left, ir_node *right)
2297 {
2298         ir_mode                *mode;
2299         dbg_info         *const dbgi       = get_dbg_info(&expr->base.pos);
2300         type_t           *const type_left  = skip_typeref(expr->left->base.type);
2301         type_t           *const type_right = skip_typeref(expr->right->base.type);
2302         expression_kind_t const kind       = expr->base.kind;
2303         switch (kind) {
2304         case EXPR_BINARY_SHIFTLEFT:
2305         case EXPR_BINARY_SHIFTRIGHT:
2306         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2307         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2308                 mode  = get_ir_mode_arithmetic(expr->base.type);
2309                 left  = create_conv(dbgi, left,  mode);
2310                 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2311                 break;
2312
2313         case EXPR_BINARY_SUB:
2314                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2315                         const pointer_type_t *const ptr_type = &type_left->pointer;
2316
2317                         mode = get_ir_mode_storage(expr->base.type);
2318                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2319                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2320                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2321                         ir_node *const no_mem    = new_NoMem();
2322                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2323                                                                                                    mode, op_pin_state_floats);
2324                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2325                 }
2326                 /* fallthrough */
2327         case EXPR_BINARY_SUB_ASSIGN:
2328                 if (is_type_pointer(type_left)) {
2329                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2330                         mode  = get_ir_mode_storage(type_left);
2331                         break;
2332                 }
2333                 goto normal_node;
2334
2335         case EXPR_BINARY_ADD:
2336         case EXPR_BINARY_ADD_ASSIGN:
2337                 if (is_type_pointer(type_left)) {
2338                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2339                         mode  = get_ir_mode_storage(type_left);
2340                         break;
2341                 } else if (is_type_pointer(type_right)) {
2342                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2343                         mode  = get_ir_mode_storage(type_right);
2344                         break;
2345                 }
2346                 goto normal_node;
2347
2348         default:
2349 normal_node:
2350                 mode  = get_ir_mode_arithmetic(type_right);
2351                 left  = create_conv(dbgi, left,  mode);
2352                 right = create_conv(dbgi, right, mode);
2353                 break;
2354         }
2355
2356         switch (kind) {
2357         case EXPR_BINARY_ADD_ASSIGN:
2358         case EXPR_BINARY_ADD:
2359                 return new_d_Add(dbgi, left, right, mode);
2360         case EXPR_BINARY_SUB_ASSIGN:
2361         case EXPR_BINARY_SUB:
2362                 return new_d_Sub(dbgi, left, right, mode);
2363         case EXPR_BINARY_MUL_ASSIGN:
2364         case EXPR_BINARY_MUL:
2365                 return new_d_Mul(dbgi, left, right, mode);
2366         case EXPR_BINARY_DIV:
2367         case EXPR_BINARY_DIV_ASSIGN:
2368                 return create_div(dbgi, left, right, mode);
2369         case EXPR_BINARY_BITWISE_AND:
2370         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2371                 return new_d_And(dbgi, left, right, mode);
2372         case EXPR_BINARY_BITWISE_OR:
2373         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2374                 return new_d_Or(dbgi, left, right, mode);
2375         case EXPR_BINARY_BITWISE_XOR:
2376         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2377                 return new_d_Eor(dbgi, left, right, mode);
2378         case EXPR_BINARY_SHIFTLEFT:
2379         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2380                 return new_d_Shl(dbgi, left, right, mode);
2381         case EXPR_BINARY_SHIFTRIGHT:
2382         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2383                 if (mode_is_signed(mode)) {
2384                         return new_d_Shrs(dbgi, left, right, mode);
2385                 } else {
2386                         return new_d_Shr(dbgi, left, right, mode);
2387                 }
2388         case EXPR_BINARY_MOD:
2389         case EXPR_BINARY_MOD_ASSIGN: {
2390                 ir_node *pin = new_Pin(new_NoMem());
2391                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2392                                          op_pin_state_floats);
2393                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2394                 return res;
2395         }
2396         default:
2397                 panic("unexpected expression kind");
2398         }
2399 }
2400
2401 static ir_node *binop_to_firm(binary_expression_t const *const expr)
2402 {
2403         ir_node *const left  = expression_to_value(expr->left);
2404         ir_node *const right = expression_to_value(expr->right);
2405         return create_op(expr, left, right);
2406 }
2407
2408 /**
2409  * Check if a given expression is a GNU __builtin_expect() call.
2410  */
2411 static bool is_builtin_expect(const expression_t *expression)
2412 {
2413         if (expression->kind != EXPR_CALL)
2414                 return false;
2415
2416         expression_t *function = expression->call.function;
2417         if (function->kind != EXPR_REFERENCE)
2418                 return false;
2419         reference_expression_t *ref = &function->reference;
2420         if (ref->entity->kind         != ENTITY_FUNCTION ||
2421             ref->entity->function.btk != BUILTIN_EXPECT)
2422                 return false;
2423
2424         return true;
2425 }
2426
2427 static void compare_to_control_flow(expression_t const *const expr, ir_node *const left, ir_node *const right, ir_relation const relation, jump_target *const true_target, jump_target *const false_target)
2428 {
2429         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2430         ir_node  *const cmp  = new_d_Cmp(dbgi, left, right, relation);
2431         if (is_Const(cmp)) {
2432                 if (tarval_is_null(get_Const_tarval(cmp))) {
2433                         jump_to_target(false_target);
2434                 } else {
2435                         jump_to_target(true_target);
2436                 }
2437         } else {
2438                 ir_node *const cond       = new_d_Cond(dbgi, cmp);
2439                 ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2440                 ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2441
2442                 /* set branch prediction info based on __builtin_expect */
2443                 if (is_builtin_expect(expr) && is_Cond(cond)) {
2444                         call_argument_t *const argument = expr->call.arguments->next;
2445                         if (is_constant_expression(argument->expression) != EXPR_CLASS_VARIABLE) {
2446                                 bool               const cnst = fold_constant_to_bool(argument->expression);
2447                                 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
2448                                 set_Cond_jmp_pred(cond, pred);
2449                         }
2450                 }
2451
2452                 add_pred_to_jump_target(true_target,  true_proj);
2453                 add_pred_to_jump_target(false_target, false_proj);
2454         }
2455         set_unreachable_now();
2456 }
2457
2458 static ir_node *control_flow_to_1_0(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
2459 {
2460         ir_node        *val  = NULL;
2461         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2462         ir_mode  *const mode = get_ir_mode_storage(expr->base.type);
2463         jump_target     exit_target;
2464         init_jump_target(&exit_target, NULL);
2465
2466         if (enter_jump_target(true_target)) {
2467                 jump_to_target(&exit_target);
2468                 val = new_d_Const(dbgi, get_mode_one(mode));
2469         }
2470
2471         if (enter_jump_target(false_target)) {
2472                 jump_to_target(&exit_target);
2473                 ir_node *const zero = new_d_Const(dbgi, get_mode_null(mode));
2474                 if (val) {
2475                         ir_node *const in[] = { val, zero };
2476                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2477                 } else {
2478                         val = zero;
2479                 }
2480         }
2481
2482         if (!enter_jump_target(&exit_target)) {
2483                 set_cur_block(new_Block(0, NULL));
2484                 val = new_d_Bad(dbgi, mode);
2485         }
2486         return val;
2487 }
2488
2489 static ir_node *binop_assign_to_firm(binary_expression_t const *const expr)
2490 {
2491         ir_node            *const right     = expression_to_value(expr->right);
2492         expression_t const *const left_expr = expr->left;
2493         ir_node            *const addr      = expression_to_addr(left_expr);
2494         ir_node            *const left      = get_value_from_lvalue(left_expr, addr);
2495         ir_node                  *result    = create_op(expr, left, right);
2496
2497         type_t *const type = skip_typeref(expr->base.type);
2498         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2499                 jump_target true_target;
2500                 jump_target false_target;
2501                 init_jump_target(&true_target,  NULL);
2502                 init_jump_target(&false_target, NULL);
2503                 ir_mode *const mode = get_irn_mode(result);
2504                 ir_node *const zero = new_Const(get_mode_null(mode));
2505                 compare_to_control_flow((expression_t const*)expr, result, zero, ir_relation_unordered_less_greater, &true_target, &false_target);
2506                 result = control_flow_to_1_0((expression_t const*)expr, &true_target, &false_target);
2507         }
2508
2509         return set_value_for_expression_addr(left_expr, result, addr);
2510 }
2511
2512 static ir_node *assign_expression_to_firm(binary_expression_t const *const expr)
2513 {
2514         ir_node *const addr  = expression_to_addr(expr->left);
2515         ir_node *const right = expression_to_value(expr->right);
2516         return set_value_for_expression_addr(expr->left, right, addr);
2517 }
2518
2519 /** evaluate an expression and discard the result, but still produce the
2520  * side-effects. */
2521 static void evaluate_expression_discard_result(const expression_t *expression)
2522 {
2523         type_t *type = skip_typeref(expression->base.type);
2524         if (is_type_complex(type)) {
2525                 expression_to_complex(expression);
2526         } else {
2527                 expression_to_value(expression);
2528         }
2529 }
2530
2531 static ir_node *comma_expression_to_firm(binary_expression_t const *const expr)
2532 {
2533         evaluate_expression_discard_result(expr->left);
2534         return expression_to_value(expr->right);
2535 }
2536
2537 static ir_node *array_access_addr(const array_access_expression_t *expression)
2538 {
2539         dbg_info *dbgi        = get_dbg_info(&expression->base.pos);
2540         ir_node  *base_addr   = expression_to_value(expression->array_ref);
2541         ir_node  *offset      = expression_to_value(expression->index);
2542         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2543         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2544         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2545
2546         return result;
2547 }
2548
2549 static ir_node *array_access_to_firm(
2550                 const array_access_expression_t *expression)
2551 {
2552         dbg_info *dbgi   = get_dbg_info(&expression->base.pos);
2553         ir_node  *addr   = array_access_addr(expression);
2554         type_t   *type   = revert_automatic_type_conversion(
2555                         (const expression_t*) expression);
2556         type             = skip_typeref(type);
2557
2558         return deref_address(dbgi, type, addr);
2559 }
2560
2561 static long get_offsetof_offset(const offsetof_expression_t *expression)
2562 {
2563         type_t *orig_type = expression->type;
2564         long    offset    = 0;
2565
2566         designator_t *designator = expression->designator;
2567         for ( ; designator != NULL; designator = designator->next) {
2568                 type_t *type = skip_typeref(orig_type);
2569                 /* be sure the type is constructed */
2570                 (void) get_ir_type(type);
2571
2572                 if (designator->symbol != NULL) {
2573                         assert(is_type_compound(type));
2574                         symbol_t *symbol = designator->symbol;
2575
2576                         compound_t *compound = type->compound.compound;
2577                         entity_t   *iter     = compound->members.entities;
2578                         for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2579
2580                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2581                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2582                         offset += get_entity_offset(iter->compound_member.entity);
2583
2584                         orig_type = iter->declaration.type;
2585                 } else {
2586                         expression_t *array_index = designator->array_index;
2587                         assert(designator->array_index != NULL);
2588                         assert(is_type_array(type));
2589
2590                         long index         = fold_constant_to_int(array_index);
2591                         ir_type *arr_type  = get_ir_type(type);
2592                         ir_type *elem_type = get_array_element_type(arr_type);
2593                         long     elem_size = get_type_size_bytes(elem_type);
2594
2595                         offset += index * elem_size;
2596
2597                         orig_type = type->array.element_type;
2598                 }
2599         }
2600
2601         return offset;
2602 }
2603
2604 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2605 {
2606         ir_mode   *mode   = get_ir_mode_storage(expression->base.type);
2607         long       offset = get_offsetof_offset(expression);
2608         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2609         dbg_info  *dbgi   = get_dbg_info(&expression->base.pos);
2610
2611         return new_d_Const(dbgi, tv);
2612 }
2613
2614 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2615                                      ir_entity *entity, type_t *type);
2616 static ir_initializer_t *create_ir_initializer(
2617                 const initializer_t *initializer, type_t *type);
2618
2619 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2620                                             initializer_t *initializer,
2621                                             type_t *type)
2622 {
2623         /* create the ir_initializer */
2624         PUSH_IRG(get_const_code_irg());
2625         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2626         POP_IRG();
2627
2628         ident     *const id          = id_unique("initializer.%u");
2629         ir_type   *const irtype      = get_ir_type(type);
2630         ir_type   *const global_type = get_glob_type();
2631         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2632         set_entity_ld_ident(entity, id);
2633         set_entity_visibility(entity, ir_visibility_private);
2634         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2635         set_entity_initializer(entity, irinitializer);
2636         return entity;
2637 }
2638
2639 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2640 {
2641         dbg_info      *dbgi        = get_dbg_info(&expression->base.pos);
2642         type_t        *type        = expression->type;
2643         initializer_t *initializer = expression->initializer;
2644
2645         if (expression->global_scope || (
2646               type->base.qualifiers & TYPE_QUALIFIER_CONST &&
2647               is_constant_initializer(initializer) != EXPR_CLASS_VARIABLE
2648             )) {
2649                 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2650                 return create_symconst(dbgi, entity);
2651         } else {
2652                 /* create an entity on the stack */
2653                 ident   *const id     = id_unique("CompLit.%u");
2654                 ir_type *const irtype = get_ir_type(type);
2655                 ir_type *frame_type   = get_irg_frame_type(current_ir_graph);
2656
2657                 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2658                 set_entity_ld_ident(entity, id);
2659
2660                 /* create initialisation code */
2661                 create_local_initializer(initializer, dbgi, entity, type);
2662
2663                 /* create a sel for the compound literal address */
2664                 ir_node *frame = get_irg_frame(current_ir_graph);
2665                 ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2666                 return sel;
2667         }
2668 }
2669
2670 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2671 {
2672         dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2673         type_t   *const type = expr->type;
2674         ir_node  *const addr = compound_literal_addr(expr);
2675         return deref_address(dbgi, type, addr);
2676 }
2677
2678 /**
2679  * Transform a sizeof expression into Firm code.
2680  */
2681 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2682 {
2683         type_t *const type = skip_typeref(expression->type);
2684         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2685         if (is_type_array(type) && type->array.is_vla
2686                         && expression->tp_expression != NULL) {
2687                 expression_to_value(expression->tp_expression);
2688         }
2689
2690         return get_type_size_node(type);
2691 }
2692
2693 static unsigned get_object_alignment(expression_t const *expr);
2694
2695 static unsigned get_address_alignment(expression_t const *const expr)
2696 {
2697         if (expr->kind == EXPR_UNARY_TAKE_ADDRESS) {
2698                 return get_object_alignment(expr->unary.value);
2699         } else {
2700                 type_t *const type = skip_typeref(expr->base.type);
2701                 assert(is_type_pointer(type));
2702                 return get_type_alignment(type->pointer.points_to);
2703         }
2704 }
2705
2706 static unsigned get_object_alignment(expression_t const *const expr)
2707 {
2708         entity_t *ent;
2709         switch (expr->kind) {
2710         case EXPR_ARRAY_ACCESS:      return get_address_alignment(expr->array_access.array_ref);
2711         case EXPR_UNARY_DEREFERENCE: return get_address_alignment(expr->unary.value);
2712         case EXPR_REFERENCE:         ent = expr->reference.entity;      break;
2713         case EXPR_SELECT:            ent = expr->select.compound_entry; break;
2714         default:                     return get_type_alignment(expr->base.type);
2715         }
2716         assert(is_declaration(ent));
2717         return ent->declaration.alignment;
2718 }
2719
2720 /**
2721  * Transform an alignof expression into Firm code.
2722  */
2723 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2724 {
2725         unsigned const alignment = expression->tp_expression
2726                 ? get_object_alignment(expression->tp_expression)
2727                 : get_type_alignment(expression->type);
2728
2729         dbg_info  *dbgi = get_dbg_info(&expression->base.pos);
2730         ir_mode   *mode = get_ir_mode_storage(expression->base.type);
2731         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
2732         return new_d_Const(dbgi, tv);
2733 }
2734
2735 static void init_ir_types(void);
2736
2737 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2738 {
2739         assert(is_constant_expression(expression) >= EXPR_CLASS_CONSTANT);
2740
2741         bool constant_folding_old = constant_folding;
2742         constant_folding = true;
2743         int old_optimize         = get_optimize();
2744         int old_constant_folding = get_opt_constant_folding();
2745         set_optimize(1);
2746         set_opt_constant_folding(1);
2747
2748         init_ir_types();
2749
2750         PUSH_IRG(get_const_code_irg());
2751         ir_node *const cnst = expression_to_value(expression);
2752         POP_IRG();
2753
2754         set_optimize(old_optimize);
2755         set_opt_constant_folding(old_constant_folding);
2756         constant_folding = constant_folding_old;
2757
2758         if (!is_Const(cnst))
2759                 panic("couldn't fold constant");
2760         return get_Const_tarval(cnst);
2761 }
2762
2763 static complex_constant fold_complex_constant(const expression_t *expression)
2764 {
2765         assert(is_constant_expression(expression) >= EXPR_CLASS_CONSTANT);
2766
2767         bool constant_folding_old = constant_folding;
2768         constant_folding = true;
2769         int old_optimize         = get_optimize();
2770         int old_constant_folding = get_opt_constant_folding();
2771         set_optimize(1);
2772         set_opt_constant_folding(1);
2773
2774         init_ir_types();
2775
2776         PUSH_IRG(get_const_code_irg());
2777         complex_value value = expression_to_complex(expression);
2778         POP_IRG();
2779
2780         set_optimize(old_optimize);
2781         set_opt_constant_folding(old_constant_folding);
2782
2783         if (!is_Const(value.real) || !is_Const(value.imag)) {
2784                 panic("couldn't fold constant");
2785         }
2786
2787         constant_folding = constant_folding_old;
2788
2789         return (complex_constant) {
2790                 get_Const_tarval(value.real),
2791                 get_Const_tarval(value.imag)
2792         };
2793 }
2794
2795 /* this function is only used in parser.c, but it relies on libfirm functionality */
2796 bool constant_is_negative(const expression_t *expression)
2797 {
2798         ir_tarval *tv = fold_constant_to_tarval(expression);
2799         return tarval_is_negative(tv);
2800 }
2801
2802 long fold_constant_to_int(const expression_t *expression)
2803 {
2804         ir_tarval *tv = fold_constant_to_tarval(expression);
2805         if (!tarval_is_long(tv)) {
2806                 panic("result of constant folding is not integer");
2807         }
2808
2809         return get_tarval_long(tv);
2810 }
2811
2812 bool fold_constant_to_bool(const expression_t *expression)
2813 {
2814         type_t *type = skip_typeref(expression->base.type);
2815         if (is_type_complex(type)) {
2816                 complex_constant tvs = fold_complex_constant(expression);
2817                 return !tarval_is_null(tvs.real) || !tarval_is_null(tvs.imag);
2818         } else {
2819                 ir_tarval *tv = fold_constant_to_tarval(expression);
2820                 return !tarval_is_null(tv);
2821         }
2822 }
2823
2824 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2825 {
2826         jump_target true_target;
2827         jump_target false_target;
2828         init_jump_target(&true_target,  NULL);
2829         init_jump_target(&false_target, NULL);
2830         ir_node *const cond_expr = expression_to_control_flow(expression->condition, &true_target, &false_target);
2831
2832         ir_node        *val  = NULL;
2833         dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2834         type_t   *const type = skip_typeref(expression->base.type);
2835         ir_mode  *const mode = get_ir_mode_arithmetic(type);
2836         jump_target exit_target;
2837         init_jump_target(&exit_target, NULL);
2838
2839         if (enter_jump_target(&true_target)) {
2840                 if (expression->true_expression) {
2841                         val = expression_to_value(expression->true_expression);
2842                 } else if (cond_expr) {
2843                         val = cond_expr;
2844                 } else {
2845                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2846                          * comparison.  Generate a "1" as value for the true branch. */
2847                         val = new_Const(get_mode_one(mode));
2848                 }
2849                 if (val)
2850                         val = create_conv(dbgi, val, mode);
2851                 jump_to_target(&exit_target);
2852         }
2853
2854         if (enter_jump_target(&false_target)) {
2855                 ir_node *false_val = expression_to_value(expression->false_expression);
2856                 if (false_val)
2857                         false_val = create_conv(dbgi, false_val, mode);
2858                 jump_to_target(&exit_target);
2859                 if (val) {
2860                         ir_node *const in[] = { val, false_val };
2861                         val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2862                 } else {
2863                         val = false_val;
2864                 }
2865         }
2866
2867         if (!enter_jump_target(&exit_target)) {
2868                 set_cur_block(new_Block(0, NULL));
2869                 if (!is_type_void(type))
2870                         val = new_Bad(mode);
2871         }
2872         return val;
2873 }
2874
2875 /**
2876  * Returns an IR-node representing the address of a field.
2877  */
2878 static ir_node *select_addr(const select_expression_t *expression)
2879 {
2880         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2881
2882         construct_select_compound(expression);
2883
2884         ir_node *compound_addr = expression_to_value(expression->compound);
2885
2886         entity_t *entry = expression->compound_entry;
2887         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2888         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2889
2890         if (constant_folding) {
2891                 ir_mode *mode      = get_irn_mode(compound_addr);
2892                 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
2893                 ir_node *ofs       = new_Const_long(mode_uint, entry->compound_member.offset);
2894                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2895         } else {
2896                 ir_entity *irentity = entry->compound_member.entity;
2897                 assert(irentity != NULL);
2898                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2899         }
2900 }
2901
2902 static ir_node *select_to_firm(const select_expression_t *expression)
2903 {
2904         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2905         ir_node  *addr = select_addr(expression);
2906         type_t   *type = revert_automatic_type_conversion(
2907                         (const expression_t*) expression);
2908         type           = skip_typeref(type);
2909
2910         entity_t *entry = expression->compound_entry;
2911         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2912
2913         if (entry->compound_member.bitfield) {
2914                 return bitfield_extract_to_firm(expression, addr);
2915         }
2916
2917         return deref_address(dbgi, type, addr);
2918 }
2919
2920 /* Values returned by __builtin_classify_type. */
2921 typedef enum gcc_type_class
2922 {
2923         no_type_class = -1,
2924         void_type_class,
2925         integer_type_class,
2926         char_type_class,
2927         enumeral_type_class,
2928         boolean_type_class,
2929         pointer_type_class,
2930         reference_type_class,
2931         offset_type_class,
2932         real_type_class,
2933         complex_type_class,
2934         function_type_class,
2935         method_type_class,
2936         record_type_class,
2937         union_type_class,
2938         array_type_class,
2939         string_type_class,
2940         set_type_class,
2941         file_type_class,
2942         lang_type_class
2943 } gcc_type_class;
2944
2945 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2946 {
2947         type_t *type = expr->type_expression->base.type;
2948
2949         /* FIXME gcc returns different values depending on whether compiling C or C++
2950          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2951         gcc_type_class tc;
2952         for (;;) {
2953                 type = skip_typeref(type);
2954                 switch (type->kind) {
2955                         case TYPE_ATOMIC: {
2956                                 const atomic_type_t *const atomic_type = &type->atomic;
2957                                 switch (atomic_type->akind) {
2958                                         /* gcc cannot do that */
2959                                         case ATOMIC_TYPE_VOID:
2960                                                 tc = void_type_class;
2961                                                 goto make_const;
2962
2963                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2964                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2965                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2966                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2967                                         case ATOMIC_TYPE_SHORT:
2968                                         case ATOMIC_TYPE_USHORT:
2969                                         case ATOMIC_TYPE_INT:
2970                                         case ATOMIC_TYPE_UINT:
2971                                         case ATOMIC_TYPE_LONG:
2972                                         case ATOMIC_TYPE_ULONG:
2973                                         case ATOMIC_TYPE_LONGLONG:
2974                                         case ATOMIC_TYPE_ULONGLONG:
2975                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2976                                                 tc = integer_type_class;
2977                                                 goto make_const;
2978
2979                                         case ATOMIC_TYPE_FLOAT:
2980                                         case ATOMIC_TYPE_DOUBLE:
2981                                         case ATOMIC_TYPE_LONG_DOUBLE:
2982                                                 tc = real_type_class;
2983                                                 goto make_const;
2984                                 }
2985                                 panic("Unexpected atomic type.");
2986                         }
2987
2988                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2989                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2990                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2991                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2992                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2993                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2994                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2995
2996                         /* gcc handles this as integer */
2997                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2998
2999                         /* gcc classifies the referenced type */
3000                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3001
3002                         /* typedef/typeof should be skipped already */
3003                         case TYPE_TYPEDEF:
3004                         case TYPE_TYPEOF:
3005                         case TYPE_ERROR:
3006                                 break;
3007                 }
3008                 panic("unexpected type.");
3009         }
3010
3011 make_const:;
3012         dbg_info  *const dbgi = get_dbg_info(&expr->base.pos);
3013         ir_mode   *const mode = atomic_modes[ATOMIC_TYPE_INT];
3014         ir_tarval *const tv   = new_tarval_from_long(tc, mode);
3015         return new_d_Const(dbgi, tv);
3016 }
3017
3018 static ir_node *function_name_to_firm(
3019                 const funcname_expression_t *const expr)
3020 {
3021         switch (expr->kind) {
3022         case FUNCNAME_FUNCTION:
3023         case FUNCNAME_PRETTY_FUNCTION:
3024         case FUNCNAME_FUNCDNAME:
3025                 if (current_function_name == NULL) {
3026                         position_t const *const src_pos = &expr->base.pos;
3027                         char       const *const name    = current_function_entity->base.symbol->string;
3028                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3029                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3030                 }
3031                 return current_function_name;
3032         case FUNCNAME_FUNCSIG:
3033                 if (current_funcsig == NULL) {
3034                         position_t const *const src_pos = &expr->base.pos;
3035                         ir_entity        *const ent     = get_irg_entity(current_ir_graph);
3036                         char       const *const name    = get_entity_ld_name(ent);
3037                         string_t          const string  = { name, strlen(name), STRING_ENCODING_CHAR };
3038                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3039                 }
3040                 return current_funcsig;
3041         }
3042         panic("Unsupported function name");
3043 }
3044
3045 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3046 {
3047         statement_t *statement = expr->statement;
3048
3049         assert(statement->kind == STATEMENT_COMPOUND);
3050         return compound_statement_to_firm(&statement->compound);
3051 }
3052
3053 static ir_node *va_start_expression_to_firm(
3054         const va_start_expression_t *const expr)
3055 {
3056         ir_entity *param_ent = current_vararg_entity;
3057         if (param_ent == NULL) {
3058                 size_t   const n           = IR_VA_START_PARAMETER_NUMBER;
3059                 ir_type *const frame_type  = get_irg_frame_type(current_ir_graph);
3060                 ir_type *const param_type  = get_unknown_type();
3061                 param_ent = new_parameter_entity(frame_type, n, param_type);
3062                 current_vararg_entity = param_ent;
3063         }
3064
3065         ir_node  *const frame   = get_irg_frame(current_ir_graph);
3066         dbg_info *const dbgi    = get_dbg_info(&expr->base.pos);
3067         ir_node  *const no_mem  = new_NoMem();
3068         ir_node  *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3069
3070         set_value_for_expression_addr(expr->ap, arg_sel, NULL);
3071
3072         return NULL;
3073 }
3074
3075 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3076 {
3077         type_t       *const type    = expr->base.type;
3078         expression_t *const ap_expr = expr->ap;
3079         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3080         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3081         dbg_info     *const dbgi    = get_dbg_info(&expr->base.pos);
3082         ir_node      *const res     = deref_address(dbgi, type, ap);
3083
3084         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3085         ir_mode      *const mode    = get_irn_mode(cnst);
3086         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3087         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3088         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3089         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3090         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3091
3092         set_value_for_expression_addr(ap_expr, add, ap_addr);
3093
3094         return res;
3095 }
3096
3097 /**
3098  * Generate Firm for a va_copy expression.
3099  */
3100 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3101 {
3102         ir_node *const src = expression_to_value(expr->src);
3103         set_value_for_expression_addr(expr->dst, src, NULL);
3104         return NULL;
3105 }
3106
3107 static ir_node *dereference_addr(const unary_expression_t *const expression)
3108 {
3109         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3110         return expression_to_value(expression->value);
3111 }
3112
3113 /**
3114  * Returns a IR-node representing an lvalue of the given expression.
3115  */
3116 static ir_node *expression_to_addr(const expression_t *expression)
3117 {
3118         switch (expression->kind) {
3119         case EXPR_ARRAY_ACCESS:
3120                 return array_access_addr(&expression->array_access);
3121         case EXPR_COMPOUND_LITERAL:
3122                 return compound_literal_addr(&expression->compound_literal);
3123         case EXPR_REFERENCE:
3124                 return reference_addr(&expression->reference);
3125         case EXPR_SELECT:
3126                 return select_addr(&expression->select);
3127         case EXPR_UNARY_DEREFERENCE:
3128                 return dereference_addr(&expression->unary);
3129         default:
3130                 break;
3131         }
3132         panic("trying to get address of non-lvalue");
3133 }
3134
3135 static ir_node *builtin_constant_to_firm(
3136                 const builtin_constant_expression_t *expression)
3137 {
3138         ir_mode *const mode = get_ir_mode_storage(expression->base.type);
3139         bool     const v    = is_constant_expression(expression->value) != EXPR_CLASS_VARIABLE;
3140         return create_Const_from_bool(mode, v);
3141 }
3142
3143 static ir_node *builtin_types_compatible_to_firm(
3144                 const builtin_types_compatible_expression_t *expression)
3145 {
3146         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3147         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3148         bool     const value = types_compatible(left, right);
3149         ir_mode *const mode  = get_ir_mode_storage(expression->base.type);
3150         return create_Const_from_bool(mode, value);
3151 }
3152
3153 static void prepare_label_target(label_t *const label)
3154 {
3155         if (label->address_taken && !label->indirect_block) {
3156                 ir_node *const iblock = new_immBlock();
3157                 label->indirect_block = iblock;
3158                 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3159                 jump_from_block_to_target(&label->target, iblock);
3160         }
3161 }
3162
3163 /**
3164  * Pointer to a label.  This is used for the
3165  * GNU address-of-label extension.
3166  */
3167 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3168 {
3169         /* Beware: Might be called from create initializer with current_ir_graph
3170          * set to const_code_irg. */
3171         PUSH_IRG(current_function);
3172         prepare_label_target(label->label);
3173         POP_IRG();
3174
3175         symconst_symbol value;
3176         value.entity_p = create_Block_entity(label->label->indirect_block);
3177         dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3178         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3179 }
3180
3181 static ir_node *expression_to_value(expression_t const *const expr)
3182 {
3183 #ifndef NDEBUG
3184         if (!constant_folding) {
3185                 assert(!expr->base.transformed);
3186                 ((expression_t*)expr)->base.transformed = true;
3187         }
3188         assert(!is_type_complex(skip_typeref(expr->base.type)));
3189 #endif
3190
3191         switch (expr->kind) {
3192         case EXPR_UNARY_CAST:
3193                 if (!is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL))
3194                         return create_cast(&expr->unary);
3195                 /* FALLTHROUGH */
3196         case EXPR_BINARY_EQUAL:
3197         case EXPR_BINARY_GREATER:
3198         case EXPR_BINARY_GREATEREQUAL:
3199         case EXPR_BINARY_ISGREATER:
3200         case EXPR_BINARY_ISGREATEREQUAL:
3201         case EXPR_BINARY_ISLESS:
3202         case EXPR_BINARY_ISLESSEQUAL:
3203         case EXPR_BINARY_ISLESSGREATER:
3204         case EXPR_BINARY_ISUNORDERED:
3205         case EXPR_BINARY_LESS:
3206         case EXPR_BINARY_LESSEQUAL:
3207         case EXPR_BINARY_LOGICAL_AND:
3208         case EXPR_BINARY_LOGICAL_OR:
3209         case EXPR_BINARY_NOTEQUAL:
3210         case EXPR_UNARY_NOT: {
3211                 jump_target true_target;
3212                 jump_target false_target;
3213                 init_jump_target(&true_target,  NULL);
3214                 init_jump_target(&false_target, NULL);
3215                 expression_to_control_flow(expr, &true_target, &false_target);
3216                 return control_flow_to_1_0(expr, &true_target, &false_target);
3217         }
3218
3219         case EXPR_BINARY_ADD:
3220         case EXPR_BINARY_BITWISE_AND:
3221         case EXPR_BINARY_BITWISE_OR:
3222         case EXPR_BINARY_BITWISE_XOR:
3223         case EXPR_BINARY_DIV:
3224         case EXPR_BINARY_MOD:
3225         case EXPR_BINARY_MUL:
3226         case EXPR_BINARY_SHIFTLEFT:
3227         case EXPR_BINARY_SHIFTRIGHT:
3228         case EXPR_BINARY_SUB:
3229                 return binop_to_firm(&expr->binary);
3230
3231         case EXPR_BINARY_ADD_ASSIGN:
3232         case EXPR_BINARY_BITWISE_AND_ASSIGN:
3233         case EXPR_BINARY_BITWISE_OR_ASSIGN:
3234         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
3235         case EXPR_BINARY_DIV_ASSIGN:
3236         case EXPR_BINARY_MOD_ASSIGN:
3237         case EXPR_BINARY_MUL_ASSIGN:
3238         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
3239         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
3240         case EXPR_BINARY_SUB_ASSIGN:
3241                 return binop_assign_to_firm(&expr->binary);
3242
3243         {
3244                 bool inc;
3245                 bool pre;
3246         case EXPR_UNARY_POSTFIX_DECREMENT: inc = false; pre = false; goto incdec;
3247         case EXPR_UNARY_POSTFIX_INCREMENT: inc = true;  pre = false; goto incdec;
3248         case EXPR_UNARY_PREFIX_DECREMENT:  inc = false; pre = true;  goto incdec;
3249         case EXPR_UNARY_PREFIX_INCREMENT:  inc = true;  pre = true;  goto incdec;
3250 incdec:
3251                 return incdec_to_firm(&expr->unary, inc, pre);
3252         }
3253
3254         case EXPR_UNARY_IMAG: {
3255                 complex_value irvalue = expression_to_complex(expr->unary.value);
3256                 return irvalue.imag;
3257         }
3258         case EXPR_UNARY_REAL: {
3259                 complex_value irvalue = expression_to_complex(expr->unary.value);
3260                 return irvalue.real;
3261         }
3262
3263         case EXPR_ALIGNOF:                    return alignof_to_firm(                 &expr->typeprop);
3264         case EXPR_ARRAY_ACCESS:               return array_access_to_firm(            &expr->array_access);
3265         case EXPR_BINARY_ASSIGN:              return assign_expression_to_firm(       &expr->binary);
3266         case EXPR_BINARY_COMMA:               return comma_expression_to_firm(        &expr->binary);
3267         case EXPR_BUILTIN_CONSTANT_P:         return builtin_constant_to_firm(        &expr->builtin_constant);
3268         case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3269         case EXPR_CALL:                       return call_expression_to_firm(         &expr->call);
3270         case EXPR_CLASSIFY_TYPE:              return classify_type_to_firm(           &expr->classify_type);
3271         case EXPR_COMPOUND_LITERAL:           return compound_literal_to_firm(        &expr->compound_literal);
3272         case EXPR_CONDITIONAL:                return conditional_to_firm(             &expr->conditional);
3273         case EXPR_ENUM_CONSTANT:              return enum_constant_to_firm(           &expr->reference);
3274         case EXPR_FUNCNAME:                   return function_name_to_firm(           &expr->funcname);
3275         case EXPR_LABEL_ADDRESS:              return label_address_to_firm(           &expr->label_address);
3276         case EXPR_LITERAL_CASES:              return literal_to_firm(                 &expr->literal);
3277         case EXPR_LITERAL_CHARACTER:          return char_literal_to_firm(            &expr->string_literal);
3278         case EXPR_OFFSETOF:                   return offsetof_to_firm(                &expr->offsetofe);
3279         case EXPR_REFERENCE:                  return reference_expression_to_firm(    &expr->reference);
3280         case EXPR_SELECT:                     return select_to_firm(                  &expr->select);
3281         case EXPR_SIZEOF:                     return sizeof_to_firm(                  &expr->typeprop);
3282         case EXPR_STATEMENT:                  return statement_expression_to_firm(    &expr->statement);
3283         case EXPR_STRING_LITERAL:             return string_to_firm(                  &expr->base.pos, "str.%u", &expr->string_literal.value);
3284         case EXPR_UNARY_ASSUME:               return handle_assume(                    expr->unary.value);
3285         case EXPR_UNARY_COMPLEMENT:           return complement_to_firm(              &expr->unary);
3286         case EXPR_UNARY_DEREFERENCE:          return dereference_to_firm(             &expr->unary);
3287         case EXPR_UNARY_NEGATE:               return negate_to_firm(                  &expr->unary);
3288         case EXPR_UNARY_PLUS:                 return expression_to_value(              expr->unary.value);
3289         case EXPR_UNARY_TAKE_ADDRESS:         return expression_to_addr(               expr->unary.value);
3290         case EXPR_VA_ARG:                     return va_arg_expression_to_firm(       &expr->va_arge);
3291         case EXPR_VA_COPY:                    return va_copy_expression_to_firm(      &expr->va_copye);
3292         case EXPR_VA_START:                   return va_start_expression_to_firm(     &expr->va_starte);
3293
3294         case EXPR_UNARY_DELETE:
3295         case EXPR_UNARY_DELETE_ARRAY:
3296         case EXPR_UNARY_THROW:
3297                 panic("expression not implemented");
3298
3299         case EXPR_ERROR:
3300                 break;
3301         }
3302         panic("invalid expression");
3303 }
3304
3305 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3306         jump_target *const true_target, jump_target *const false_target,
3307         ir_relation relation);
3308
3309 static complex_value complex_to_control_flow(const expression_t *expression,
3310                                              jump_target *true_target,
3311                                              jump_target *false_target);
3312
3313 /**
3314  * create a short-circuit expression evaluation that tries to construct
3315  * efficient control flow structures for &&, || and ! expressions
3316  */
3317 static ir_node *expression_to_control_flow(expression_t const *const expr, jump_target *const true_target, jump_target *const false_target)
3318 {
3319         switch (expr->kind) {
3320         case EXPR_UNARY_NOT:
3321                 expression_to_control_flow(expr->unary.value, false_target, true_target);
3322                 return NULL;
3323
3324         case EXPR_BINARY_LOGICAL_AND: {
3325                 jump_target extra_target;
3326                 init_jump_target(&extra_target, NULL);
3327                 expression_to_control_flow(expr->binary.left, &extra_target, false_target);
3328                 if (enter_jump_target(&extra_target))
3329                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3330                 return NULL;
3331         }
3332
3333         case EXPR_BINARY_LOGICAL_OR: {
3334                 jump_target extra_target;
3335                 init_jump_target(&extra_target, NULL);
3336                 expression_to_control_flow(expr->binary.left, true_target, &extra_target);
3337                 if (enter_jump_target(&extra_target))
3338                         expression_to_control_flow(expr->binary.right, true_target, false_target);
3339                 return NULL;
3340         }
3341
3342         case EXPR_BINARY_COMMA:
3343                 evaluate_expression_discard_result(expr->binary.left);
3344                 return expression_to_control_flow(expr->binary.right, true_target, false_target);
3345
3346         case EXPR_BINARY_EQUAL:
3347         case EXPR_BINARY_GREATER:
3348         case EXPR_BINARY_GREATEREQUAL:
3349         case EXPR_BINARY_ISGREATER:
3350         case EXPR_BINARY_ISGREATEREQUAL:
3351         case EXPR_BINARY_ISLESS:
3352         case EXPR_BINARY_ISLESSEQUAL:
3353         case EXPR_BINARY_ISLESSGREATER:
3354         case EXPR_BINARY_ISUNORDERED:
3355         case EXPR_BINARY_LESS:
3356         case EXPR_BINARY_LESSEQUAL:
3357         case EXPR_BINARY_NOTEQUAL: {
3358                 type_t     *const type     = skip_typeref(expr->binary.left->base.type);
3359                 ir_relation const relation = get_relation(expr->kind);
3360                 if (is_type_complex(type)) {
3361                         complex_equality_evaluation(&expr->binary, true_target,
3362                                                     false_target, relation);
3363                         return NULL;
3364                 }
3365
3366                 dbg_info *const dbgi  = get_dbg_info(&expr->base.pos);
3367                 ir_mode  *const mode  = get_ir_mode_arithmetic(type);
3368                 ir_node  *const left  = create_conv(dbgi, expression_to_value(expr->binary.left),  mode);
3369                 ir_node  *const right = create_conv(dbgi, expression_to_value(expr->binary.right), mode);
3370                 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3371                 return NULL;
3372         }
3373
3374         case EXPR_UNARY_CAST:
3375                 if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_BOOL)) {
3376                         expression_to_control_flow(expr->unary.value, true_target, false_target);
3377                         return NULL;
3378                 }
3379                 /* FALLTHROUGH */
3380         default: {
3381                 type_t *const type = skip_typeref(expr->base.type);
3382                 if (is_type_complex(type)) {
3383                         complex_to_control_flow(expr, true_target, false_target);
3384                         return NULL;
3385                 }
3386
3387                 dbg_info   *const dbgi  = get_dbg_info(&expr->base.pos);
3388                 ir_mode    *const mode  = get_ir_mode_arithmetic(type);
3389                 ir_node    *const val   = create_conv(dbgi, expression_to_value(expr), mode);
3390                 ir_node    *const left  = val;
3391                 ir_node    *const right = new_Const(get_mode_null(get_irn_mode(val)));
3392                 ir_relation const relation = ir_relation_unordered_less_greater;
3393                 compare_to_control_flow(expr, left, right, relation, true_target, false_target);
3394                 return val;
3395         }
3396         }
3397 }
3398
3399 static complex_value complex_conv(dbg_info *dbgi, complex_value value,
3400                                   ir_mode *mode)
3401 {
3402         return (complex_value) {
3403                 create_conv(dbgi, value.real, mode),
3404                 create_conv(dbgi, value.imag, mode)
3405         };
3406 }
3407
3408 static complex_value complex_conv_to_storage(dbg_info *const dbgi,
3409         complex_value const value, type_t *const type)
3410 {
3411         ir_mode *const mode = get_complex_mode_storage(type);
3412         return complex_conv(dbgi, value, mode);
3413 }
3414
3415 static void store_complex(dbg_info *dbgi, ir_node *addr, type_t *type,
3416                           complex_value value)
3417 {
3418         value = complex_conv_to_storage(dbgi, value, type);
3419         ir_graph  *const irg    = current_ir_graph;
3420         ir_type   *const irtype = get_ir_type(type);
3421         ir_node   *const mem    = get_store();
3422         ir_node   *const nomem  = get_irg_no_mem(irg);
3423         ir_mode   *const mode   = get_complex_mode_storage(type);
3424         ir_node   *const real   = create_conv(dbgi, value.real, mode);
3425         ir_node   *const imag   = create_conv(dbgi, value.imag, mode);
3426         ir_node   *const storer = new_d_Store(dbgi, mem, addr, real, cons_floats);
3427         ir_node   *const memr   = new_Proj(storer, mode_M, pn_Store_M);
3428         ir_mode   *const muint  = atomic_modes[ATOMIC_TYPE_UINT];
3429         ir_node   *const one    = new_Const(get_mode_one(muint));
3430         ir_node   *const in[1]  = { one };
3431         ir_entity *const arrent = get_array_element_entity(irtype);
3432         ir_node   *const addri  = new_d_Sel(dbgi, nomem, addr, 1, in, arrent);
3433         ir_node   *const storei = new_d_Store(dbgi, memr, addri, imag, cons_floats);
3434         ir_node   *const memi   = new_Proj(storei, mode_M, pn_Store_M);
3435         set_store(memi);
3436 }
3437
3438 static ir_node *complex_to_memory(dbg_info *dbgi, type_t *type,
3439                                   complex_value value)
3440 {
3441         ir_graph  *const irg         = current_ir_graph;
3442         ir_type   *const frame_type  = get_irg_frame_type(irg);
3443         ident     *const id          = id_unique("cmplex_tmp.%u");
3444         ir_type   *const irtype      = get_ir_type(type);
3445         ir_entity *const tmp_storage = new_entity(frame_type, id, irtype);
3446         ir_node   *const frame       = get_irg_frame(irg);
3447         ir_node   *const nomem       = get_irg_no_mem(irg);
3448         ir_node   *const addr        = new_simpleSel(nomem, frame, tmp_storage);
3449         set_entity_compiler_generated(tmp_storage, 1);
3450         store_complex(dbgi, addr, type, value);
3451         return addr;
3452 }
3453
3454 static complex_value read_localvar_complex(dbg_info *dbgi, entity_t *const entity)
3455 {
3456         assert(entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE
3457             || entity->declaration.kind == DECLARATION_KIND_PARAMETER);
3458         type_t  *const type = skip_typeref(entity->declaration.type);
3459         ir_mode *const mode = get_complex_mode_storage(type);
3460         ir_node *const real = get_value(entity->variable.v.value_number, mode);
3461         ir_node *const imag = get_value(entity->variable.v.value_number+1, mode);
3462         ir_mode *const mode_arithmetic = get_complex_mode_arithmetic(type);
3463         return (complex_value) {
3464                 create_conv(dbgi, real, mode_arithmetic),
3465                 create_conv(dbgi, imag, mode_arithmetic)
3466         };
3467 }
3468
3469 static complex_value complex_deref_address(dbg_info *const dbgi,
3470                                            type_t *type, ir_node *const addr,
3471                                            ir_cons_flags flags)
3472 {
3473         type = skip_typeref(type);
3474         assert(is_type_complex(type));
3475
3476         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
3477                 flags |= cons_volatile;
3478         ir_mode   *const mode      = get_complex_mode_storage(type);
3479         ir_node   *const memory    = get_store();
3480         ir_node   *const load      = new_d_Load(dbgi, memory, addr, mode, flags);
3481         ir_node   *const load_mem  = new_Proj(load, mode_M, pn_Load_M);
3482         ir_node   *const load_res  = new_Proj(load, mode,   pn_Load_res);
3483
3484         ir_type   *const irtype    = get_ir_type(type);
3485         ir_mode   *const mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3486         ir_node   *const in[1]     = { new_Const(get_mode_one(mode_uint)) };
3487         ir_entity *const entity    = get_array_element_entity(irtype);
3488         ir_node   *const nomem     = get_irg_no_mem(current_ir_graph);
3489         ir_node   *const addr2     = new_Sel(nomem, addr, 1, in, entity);
3490         ir_node   *const load2     = new_d_Load(dbgi, load_mem, addr2, mode, flags);
3491         ir_node   *const load_mem2 = new_Proj(load2, mode_M, pn_Load_M);
3492         ir_node   *const load_res2 = new_Proj(load2, mode, pn_Load_res);
3493         set_store(load_mem2);
3494
3495         return (complex_value) { load_res, load_res2 };
3496 }
3497
3498 static complex_value complex_reference_to_firm(const reference_expression_t *ref)
3499 {
3500         dbg_info *const dbgi   = get_dbg_info(&ref->base.pos);
3501         entity_t *const entity = ref->entity;
3502         assert(is_declaration(entity));
3503
3504         switch ((declaration_kind_t)entity->declaration.kind) {
3505         case DECLARATION_KIND_LOCAL_VARIABLE:
3506         case DECLARATION_KIND_PARAMETER:
3507                 return read_localvar_complex(dbgi, entity);
3508         default: {
3509                 ir_node *const addr = reference_addr(ref);
3510                 return complex_deref_address(dbgi, entity->declaration.type, addr, cons_none);
3511         }
3512         }
3513 }
3514
3515 static complex_value complex_select_to_firm(const select_expression_t *select)
3516 {
3517         dbg_info *const dbgi = get_dbg_info(&select->base.pos);
3518         ir_node  *const addr = select_addr(select);
3519         type_t   *const type = skip_typeref(select->base.type);
3520         return complex_deref_address(dbgi, type, addr, cons_none);
3521 }
3522
3523 static complex_value complex_array_access_to_firm(
3524         const array_access_expression_t *expression)
3525 {
3526         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3527         ir_node  *addr = array_access_addr(expression);
3528         type_t   *type = skip_typeref(expression->base.type);
3529         assert(is_type_complex(type));
3530         return complex_deref_address(dbgi, type, addr, cons_none);
3531 }
3532
3533 static complex_value get_complex_from_lvalue(const expression_t *expression,
3534                                              ir_node *addr)
3535 {
3536         dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3537
3538         if (expression->kind == EXPR_REFERENCE) {
3539                 const reference_expression_t *ref = &expression->reference;
3540
3541                 entity_t *entity = ref->entity;
3542                 assert(entity->kind == ENTITY_VARIABLE
3543                     || entity->kind == ENTITY_PARAMETER);
3544                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3545                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3546                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3547                     return read_localvar_complex(dbgi, entity);
3548                 }
3549         }
3550
3551         assert(addr != NULL);
3552         return complex_deref_address(dbgi, expression->base.type, addr, cons_none);
3553 }
3554
3555 static complex_value complex_cast_to_firm(const unary_expression_t *expression)
3556 {
3557         const expression_t *const value     = expression->value;
3558         dbg_info           *const dbgi      = get_dbg_info(&expression->base.pos);
3559         type_t             *const from_type = skip_typeref(value->base.type);
3560         type_t             *const to_type   = skip_typeref(expression->base.type);
3561         ir_mode            *const mode      = get_complex_mode_storage(to_type);
3562
3563         if (is_type_complex(from_type)) {
3564                 complex_value cvalue = expression_to_complex(value);
3565                 return complex_conv(dbgi, cvalue, mode);
3566         } else {
3567                 ir_node *const value_node = expression_to_value(value);
3568                 ir_node *const zero       = new_Const(get_mode_null(mode));
3569                 ir_node *const casted     = create_conv(dbgi, value_node, mode);
3570                 return (complex_value) { casted, zero };
3571         }
3572 }
3573
3574 static complex_value complex_literal_to_firm(const literal_expression_t *literal)
3575 {
3576         type_t  *type     = skip_typeref(literal->base.type);
3577         ir_mode *mode     = get_complex_mode_storage(type);
3578         ir_node *litvalue = literal_to_firm_(literal, mode);
3579         ir_node *zero     = new_Const(get_mode_null(mode));
3580         return (complex_value) { zero, litvalue };
3581 }
3582
3583 typedef complex_value (*new_complex_binop)(dbg_info *dbgi, complex_value left,
3584                                            complex_value right, ir_mode *mode);
3585
3586 static complex_value new_complex_add(dbg_info *dbgi, complex_value left,
3587                                      complex_value right, ir_mode *mode)
3588 {
3589         return (complex_value) {
3590                 new_d_Add(dbgi, left.real, right.real, mode),
3591                 new_d_Add(dbgi, left.imag, right.imag, mode)
3592         };
3593 }
3594
3595 static complex_value new_complex_sub(dbg_info *dbgi, complex_value left,
3596                                      complex_value right, ir_mode *mode)
3597 {
3598         return (complex_value) {
3599                 new_d_Sub(dbgi, left.real, right.real, mode),
3600                 new_d_Sub(dbgi, left.imag, right.imag, mode)
3601         };
3602 }
3603
3604 static complex_value new_complex_mul(dbg_info *dbgi, complex_value left,
3605                                      complex_value right, ir_mode *mode)
3606 {
3607         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3608         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3609         ir_node *const op3 = new_d_Mul(dbgi, left.real, right.imag, mode);
3610         ir_node *const op4 = new_d_Mul(dbgi, left.imag, right.real, mode);
3611         return (complex_value) {
3612                 new_d_Sub(dbgi, op1, op2, mode),
3613                 new_d_Add(dbgi, op3, op4, mode)
3614         };
3615 }
3616
3617 static complex_value new_complex_div(dbg_info *dbgi, complex_value left,
3618                                      complex_value right, ir_mode *mode)
3619 {
3620         ir_node *const op1 = new_d_Mul(dbgi, left.real, right.real, mode);
3621         ir_node *const op2 = new_d_Mul(dbgi, left.imag, right.imag, mode);
3622         ir_node *const op3 = new_d_Mul(dbgi, left.imag, right.real, mode);
3623         ir_node *const op4 = new_d_Mul(dbgi, left.real, right.imag, mode);
3624         ir_node *const op5 = new_d_Mul(dbgi, right.real, right.real, mode);
3625         ir_node *const op6 = new_d_Mul(dbgi, right.imag, right.imag, mode);
3626         ir_node *const real_dividend = new_d_Add(dbgi, op1, op2, mode);
3627         ir_node *const real_divisor  = new_d_Add(dbgi, op5, op6, mode);
3628         ir_node *const imag_dividend = new_d_Sub(dbgi, op3, op4, mode);
3629         ir_node *const imag_divisor  = new_d_Add(dbgi, op5, op6, mode);
3630         return (complex_value) {
3631                 create_div(dbgi, real_dividend, real_divisor, mode),
3632                 create_div(dbgi, imag_dividend, imag_divisor, mode)
3633         };
3634 }
3635
3636 typedef complex_value (*new_complex_unop)(dbg_info *dbgi, complex_value value,
3637                                           ir_mode *mode);
3638
3639 static complex_value new_complex_increment(dbg_info *dbgi, complex_value value,
3640                                            ir_mode *mode)
3641 {
3642         ir_node *one = new_Const(get_mode_one(mode));
3643         return (complex_value) {
3644                 new_d_Add(dbgi, value.real, one, mode),
3645                 value.imag
3646         };
3647 }
3648
3649 static complex_value new_complex_decrement(dbg_info *dbgi, complex_value value,
3650                                            ir_mode *mode)
3651 {
3652         ir_node *one = new_Const(get_mode_one(mode));
3653         return (complex_value) {
3654                 new_d_Sub(dbgi, value.real, one, mode),
3655                 value.imag
3656         };
3657 }
3658
3659 static void set_complex_value_for_expression(dbg_info *dbgi,
3660                                                                                          const expression_t *expression,
3661                                              complex_value value,
3662                                              ir_node *addr)
3663 {
3664         type_t  *const type = skip_typeref(expression->base.type);
3665         ir_mode *const mode = get_complex_mode_storage(type);
3666         ir_node *const real = create_conv(dbgi, value.real, mode);
3667         ir_node *const imag = create_conv(dbgi, value.imag, mode);
3668
3669         if (expression->kind == EXPR_REFERENCE) {
3670                 const reference_expression_t *ref = &expression->reference;
3671
3672                 entity_t *entity = ref->entity;
3673                 assert(is_declaration(entity));
3674                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
3675                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
3676                     entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
3677                         set_value(entity->variable.v.value_number, real);
3678                         set_value(entity->variable.v.value_number+1, imag);
3679                         return;
3680                 }
3681         }
3682
3683         if (addr == NULL)
3684                 addr = expression_to_addr(expression);
3685         assert(addr != NULL);
3686         store_complex(dbgi, addr, type, value);
3687 }
3688
3689 static complex_value create_complex_assign_unop(const unary_expression_t *unop,
3690                                                 new_complex_unop constructor,
3691                                                 bool return_old)
3692 {
3693         dbg_info *const     dbgi       = get_dbg_info(&unop->base.pos);
3694         const expression_t *value_expr = unop->value;
3695         ir_node            *addr       = expression_to_addr(value_expr);
3696         complex_value       value      = get_complex_from_lvalue(value_expr, addr);
3697         type_t             *type       = skip_typeref(unop->base.type);
3698         ir_mode            *mode       = get_complex_mode_arithmetic(type);
3699         value = complex_conv(dbgi, value, mode);
3700         complex_value       new_value  = constructor(dbgi, value, mode);
3701         set_complex_value_for_expression(dbgi, value_expr, new_value, addr);
3702         return return_old ? value : new_value;
3703 }
3704
3705 static complex_value complex_negate_to_firm(const unary_expression_t *expr)
3706 {
3707         complex_value cvalue = expression_to_complex(expr->value);
3708         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3709         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3710         cvalue = complex_conv(dbgi, cvalue, mode);
3711         return (complex_value) {
3712                 new_d_Minus(dbgi, cvalue.real, mode),
3713                 new_d_Minus(dbgi, cvalue.imag, mode)
3714         };
3715 }
3716
3717 static complex_value complex_complement_to_firm(const unary_expression_t *expr)
3718 {
3719         complex_value cvalue = expression_to_complex(expr->value);
3720         dbg_info     *dbgi   = get_dbg_info(&expr->base.pos);
3721         ir_mode      *mode   = get_complex_mode_arithmetic(expr->base.type);
3722         cvalue = complex_conv(dbgi, cvalue, mode);
3723         return (complex_value) {
3724                 cvalue.real,
3725                 new_d_Minus(dbgi, cvalue.imag, mode)
3726         };
3727 }
3728
3729 static complex_value create_complex_binop(const binary_expression_t *binexpr,
3730                                           new_complex_binop constructor)
3731 {
3732         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3733         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->base.type);
3734         complex_value left  = expression_to_complex(binexpr->left);
3735         complex_value right = expression_to_complex(binexpr->right);
3736         left  = complex_conv(dbgi, left, mode);
3737         right = complex_conv(dbgi, right, mode);
3738         return constructor(dbgi, left, right, mode);
3739 }
3740
3741 static complex_value create_complex_assign_binop(const binary_expression_t *binexpr,
3742                                                  new_complex_binop constructor)
3743 {
3744         dbg_info      *dbgi   = get_dbg_info(&binexpr->base.pos);
3745         expression_t  *lefte  = binexpr->left;
3746         expression_t  *righte = binexpr->right;
3747         ir_mode       *mode   = get_complex_mode_arithmetic(righte->base.type);
3748         ir_node       *addr   = expression_to_addr(lefte);
3749         complex_value  left   = get_complex_from_lvalue(lefte, addr);
3750         complex_value  right  = expression_to_complex(righte);
3751         left  = complex_conv(dbgi, left, mode);
3752         right = complex_conv(dbgi, right, mode);
3753         complex_value  new_value = constructor(dbgi, left, right, mode);
3754         type_t        *res_type  = skip_typeref(binexpr->base.type);
3755         set_complex_value_for_expression(dbgi, lefte, new_value, addr);
3756         return complex_conv_to_storage(dbgi, new_value, res_type);
3757 }
3758
3759 static complex_value complex_call_to_firm(const call_expression_t *call)
3760 {
3761         ir_node         *result        = call_expression_to_firm(call);
3762         expression_t    *function      = call->function;
3763         type_t          *type          = skip_typeref(function->base.type);
3764         assert(is_type_pointer(type));
3765         pointer_type_t  *pointer_type  = &type->pointer;
3766         type_t          *points_to     = skip_typeref(pointer_type->points_to);
3767         assert(is_type_function(points_to));
3768         function_type_t *function_type = &points_to->function;
3769         type_t          *return_type   = skip_typeref(function_type->return_type);
3770         assert(is_type_complex(return_type));
3771         dbg_info        *dbgi          = get_dbg_info(&call->base.pos);
3772         return complex_deref_address(dbgi, return_type, result, cons_floats);
3773 }
3774
3775 static void complex_equality_evaluation(const binary_expression_t *binexpr,
3776         jump_target *const true_target, jump_target *const false_target,
3777         ir_relation relation)
3778 {
3779         jump_target extra_target;
3780         init_jump_target(&extra_target, NULL);
3781
3782         complex_value left  = expression_to_complex(binexpr->left);
3783         complex_value right = expression_to_complex(binexpr->right);
3784         dbg_info     *dbgi  = get_dbg_info(&binexpr->base.pos);
3785         ir_mode      *mode  = get_complex_mode_arithmetic(binexpr->left->base.type);
3786         left  = complex_conv(dbgi, left, mode);
3787         right = complex_conv(dbgi, right, mode);
3788
3789         ir_node  *cmp_real   = new_d_Cmp(dbgi, left.real, right.real, relation);
3790         ir_node  *cond       = new_d_Cond(dbgi, cmp_real);
3791         ir_node  *true_proj  = new_Proj(cond, mode_X, pn_Cond_true);
3792         ir_node  *false_proj = new_Proj(cond, mode_X, pn_Cond_false);
3793         add_pred_to_jump_target(&extra_target, true_proj);
3794         add_pred_to_jump_target(false_target, false_proj);
3795         if (!enter_jump_target(&extra_target))
3796                 return;
3797
3798         ir_node *cmp_imag     = new_d_Cmp(dbgi, left.imag, right.imag, relation);
3799         ir_node *condi        = new_d_Cond(dbgi, cmp_imag);
3800         ir_node *true_proj_i  = new_Proj(condi, mode_X, pn_Cond_true);
3801         ir_node *false_proj_i = new_Proj(condi, mode_X, pn_Cond_false);
3802         add_pred_to_jump_target(true_target, true_proj_i);
3803         add_pred_to_jump_target(false_target, false_proj_i);
3804         set_unreachable_now();
3805 }
3806
3807 static complex_value complex_to_control_flow(
3808         const expression_t *const expression, jump_target *const true_target,
3809         jump_target *const false_target)
3810 {
3811         jump_target extra_target;
3812         init_jump_target(&extra_target, NULL);
3813         complex_value       value      = expression_to_complex(expression);
3814         if (is_Const(value.real) && is_Const(value.imag)) {
3815                 ir_tarval *tv_real = get_Const_tarval(value.real);
3816                 ir_tarval *tv_imag = get_Const_tarval(value.imag);
3817                 if (tarval_is_null(tv_real) && tarval_is_null(tv_imag)) {
3818                         jump_to_target(false_target);
3819                 } else {
3820                         jump_to_target(true_target);
3821                 }
3822                 set_unreachable_now();
3823                 return value;
3824         }
3825
3826         dbg_info     *const dbgi       = get_dbg_info(&expression->base.pos);
3827         type_t       *const type       = expression->base.type;
3828         ir_mode      *const mode       = get_complex_mode_arithmetic(type);
3829         value = complex_conv(dbgi, value, mode);
3830         ir_node      *const zero       = new_Const(get_mode_null(mode));
3831         ir_node      *const cmp_real   =
3832                 new_d_Cmp(dbgi, value.real, zero, ir_relation_unordered_less_greater);
3833         ir_node      *const cond_real  = new_d_Cond(dbgi, cmp_real);
3834         ir_node      *const true_real  = new_Proj(cond_real, mode_X, pn_Cond_true);
3835         ir_node      *const false_real = new_Proj(cond_real, mode_X, pn_Cond_false);
3836         add_pred_to_jump_target(true_target, true_real);
3837         add_pred_to_jump_target(&extra_target, false_real);
3838         if (!enter_jump_target(&extra_target))
3839                 return value;
3840
3841         ir_node      *const cmp_imag   =
3842                 new_d_Cmp(dbgi, value.imag, zero, ir_relation_unordered_less_greater);
3843         ir_node      *const cond_imag  = new_d_Cond(dbgi, cmp_imag);
3844         ir_node      *const true_imag  = new_Proj(cond_imag, mode_X, pn_Cond_true);
3845         ir_node      *const false_imag = new_Proj(cond_imag, mode_X, pn_Cond_false);
3846         add_pred_to_jump_target(true_target, true_imag);
3847         add_pred_to_jump_target(false_target, false_imag);
3848         set_unreachable_now();
3849
3850         return value;
3851 }
3852
3853 static complex_value complex_conditional_to_firm(
3854         const conditional_expression_t *const expression)
3855 {
3856         jump_target true_target;
3857         jump_target false_target;
3858         init_jump_target(&true_target,  NULL);
3859         init_jump_target(&false_target, NULL);
3860         complex_value cond_val;
3861         memset(&cond_val, 0, sizeof(cond_val));
3862         if (expression->true_expression == NULL) {
3863                 assert(is_type_complex(skip_typeref(expression->condition->base.type)));
3864                 cond_val = complex_to_control_flow(expression->condition,
3865                                                    &true_target, &false_target);
3866         } else {
3867                 expression_to_control_flow(expression->condition, &true_target, &false_target);
3868         }
3869
3870         complex_value  val;
3871         memset(&val, 0, sizeof(val));
3872         jump_target    exit_target;
3873         init_jump_target(&exit_target, NULL);
3874         type_t   *const type = skip_typeref(expression->base.type);
3875         ir_mode  *const mode = get_complex_mode_arithmetic(type);
3876         dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
3877
3878         if (enter_jump_target(&true_target)) {
3879                 if (expression->true_expression) {
3880                         val = expression_to_complex(expression->true_expression);
3881                 } else {
3882                         assert(cond_val.real != NULL);
3883                         val = cond_val;
3884                 }
3885                 val = complex_conv(dbgi, val, mode);
3886                 jump_to_target(&exit_target);
3887         }
3888
3889         if (enter_jump_target(&false_target)) {
3890                 complex_value false_val
3891                         = expression_to_complex(expression->false_expression);
3892                 false_val = complex_conv(dbgi, false_val, mode);
3893                 jump_to_target(&exit_target);
3894                 if (val.real != NULL) {
3895                         ir_node  *const inr[] = { val.real, false_val.real };
3896                         ir_node  *const ini[] = { val.imag, false_val.imag };
3897                         ir_node  *const block = exit_target.block;
3898                         val.real = new_rd_Phi(dbgi, block, lengthof(inr), inr, mode);
3899                         val.imag = new_rd_Phi(dbgi, block, lengthof(ini), ini, mode);
3900                 } else {
3901                         val = false_val;
3902                 }
3903         }
3904
3905         if (!enter_jump_target(&exit_target)) {
3906                 set_cur_block(new_Block(0, NULL));
3907                 assert(!is_type_void(type));
3908                 val.real = val.imag = new_Bad(mode);
3909         }
3910         return val;
3911 }
3912
3913 static void create_local_declarations(entity_t*);
3914
3915 static complex_value compound_statement_to_firm_complex(
3916         const compound_statement_t *compound)
3917 {
3918         create_local_declarations(compound->scope.entities);
3919
3920         complex_value result    = { NULL, NULL };
3921         statement_t  *statement = compound->statements;
3922         statement_t  *next;
3923         for ( ; statement != NULL; statement = next) {
3924                 next = statement->base.next;
3925                 /* last statement is the return value */
3926                 if (next == NULL) {
3927                         /* it must be an expression, otherwise we wouldn't be in the
3928                          * complex variant of compound_statement_to_firm */
3929                         if (statement->kind != STATEMENT_EXPRESSION)
3930                                 panic("last member of complex statement expression not an expression statement");
3931                         expression_t *expression = statement->expression.expression;
3932                         assert(is_type_complex(skip_typeref(expression->base.type)));
3933                         result = expression_to_complex(expression);
3934                 } else {
3935                         statement_to_firm(statement);
3936                 }
3937         }
3938
3939         return result;
3940 }
3941
3942 static complex_value complex_assign_to_firm(const binary_expression_t *expr)
3943 {
3944         dbg_info     *const dbgi  = get_dbg_info(&expr->base.pos);
3945         complex_value const value = expression_to_complex(expr->right);
3946         ir_node      *const addr  = expression_to_addr(expr->left);
3947         set_complex_value_for_expression(dbgi, expr->left, value, addr);
3948         return value;
3949 }
3950
3951 static complex_value complex_statement_expression_to_firm(
3952         const statement_expression_t *const expr)
3953 {
3954         const statement_t *const statement = expr->statement;
3955         assert(statement->kind == STATEMENT_COMPOUND);
3956
3957         return compound_statement_to_firm_complex(&statement->compound);
3958 }
3959
3960 static complex_value expression_to_complex(const expression_t *expression)
3961 {
3962         switch (expression->kind) {
3963         case EXPR_REFERENCE:
3964                 return complex_reference_to_firm(&expression->reference);
3965         case EXPR_SELECT:
3966                 return complex_select_to_firm(&expression->select);
3967         case EXPR_ARRAY_ACCESS:
3968                 return complex_array_access_to_firm(&expression->array_access);
3969         case EXPR_UNARY_CAST:
3970                 return complex_cast_to_firm(&expression->unary);
3971         case EXPR_BINARY_COMMA:
3972                 evaluate_expression_discard_result(expression->binary.left);
3973                 return expression_to_complex(expression->binary.right);
3974         case EXPR_BINARY_ADD:
3975                 return create_complex_binop(&expression->binary, new_complex_add);
3976         case EXPR_BINARY_ADD_ASSIGN:
3977                 return create_complex_assign_binop(&expression->binary, new_complex_add);
3978         case EXPR_BINARY_SUB:
3979                 return create_complex_binop(&expression->binary, new_complex_sub);
3980         case EXPR_BINARY_SUB_ASSIGN:
3981                 return create_complex_assign_binop(&expression->binary, new_complex_sub);
3982         case EXPR_BINARY_MUL:
3983                 return create_complex_binop(&expression->binary, new_complex_mul);
3984         case EXPR_BINARY_MUL_ASSIGN:
3985                 return create_complex_assign_binop(&expression->binary, new_complex_mul);
3986         case EXPR_BINARY_DIV:
3987                 return create_complex_binop(&expression->binary, new_complex_div);
3988         case EXPR_BINARY_DIV_ASSIGN:
3989                 return create_complex_assign_binop(&expression->binary, new_complex_div);
3990         case EXPR_UNARY_PLUS:
3991                 return expression_to_complex(expression->unary.value);
3992         case EXPR_UNARY_PREFIX_INCREMENT:
3993                 return create_complex_assign_unop(&expression->unary,
3994                                                   new_complex_increment, false);
3995         case EXPR_UNARY_PREFIX_DECREMENT:
3996                 return create_complex_assign_unop(&expression->unary,
3997                                                   new_complex_decrement, false);
3998         case EXPR_UNARY_POSTFIX_INCREMENT:
3999                 return create_complex_assign_unop(&expression->unary,
4000                                                   new_complex_increment, true);
4001         case EXPR_UNARY_POSTFIX_DECREMENT:
4002                 return create_complex_assign_unop(&expression->unary,
4003                                                   new_complex_decrement, true);
4004         case EXPR_UNARY_NEGATE:
4005                 return complex_negate_to_firm(&expression->unary);
4006         case EXPR_UNARY_COMPLEMENT:
4007                 return complex_complement_to_firm(&expression->unary);
4008         case EXPR_BINARY_ASSIGN:
4009                 return complex_assign_to_firm(&expression->binary);
4010         case EXPR_LITERAL_CASES:
4011                 return complex_literal_to_firm(&expression->literal);
4012         case EXPR_CALL:
4013                 return complex_call_to_firm(&expression->call);
4014         case EXPR_CONDITIONAL:
4015                 return complex_conditional_to_firm(&expression->conditional);
4016         case EXPR_STATEMENT:
4017                 return complex_statement_expression_to_firm(&expression->statement);
4018         default:
4019                 panic("unexpected complex expression");
4020         }
4021 }
4022
4023
4024
4025 static void create_variable_entity(entity_t *variable,
4026                                    declaration_kind_t declaration_kind,
4027                                    ir_type *parent_type)
4028 {
4029         assert(variable->kind == ENTITY_VARIABLE);
4030         type_t    *type = skip_typeref(variable->declaration.type);
4031
4032         ident     *const id        = new_id_from_str(variable->base.symbol->string);
4033         ir_type   *const irtype    = get_ir_type(type);
4034         dbg_info  *const dbgi      = get_dbg_info(&variable->base.pos);
4035         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
4036         unsigned         alignment = variable->declaration.alignment;
4037
4038         set_entity_alignment(irentity, alignment);
4039
4040         handle_decl_modifiers(irentity, variable);
4041
4042         variable->declaration.kind  = (unsigned char) declaration_kind;
4043         variable->variable.v.entity = irentity;
4044         set_entity_ld_ident(irentity, create_ld_ident(variable));
4045
4046         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4047                 set_entity_volatility(irentity, volatility_is_volatile);
4048         }
4049 }
4050
4051
4052 typedef struct type_path_entry_t type_path_entry_t;
4053 struct type_path_entry_t {
4054         type_t           *type;
4055         ir_initializer_t *initializer;
4056         size_t            index;
4057         entity_t         *compound_entry;
4058 };
4059
4060 typedef struct type_path_t type_path_t;
4061 struct type_path_t {
4062         type_path_entry_t *path;
4063         type_t            *top_type;
4064         bool               invalid;
4065 };
4066
4067 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
4068 {
4069         size_t len = ARR_LEN(path->path);
4070
4071         for (size_t i = 0; i < len; ++i) {
4072                 const type_path_entry_t *entry = & path->path[i];
4073
4074                 type_t *type = skip_typeref(entry->type);
4075                 if (is_type_compound(type)) {
4076                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
4077                 } else if (is_type_array(type)) {
4078                         fprintf(stderr, "[%u]", (unsigned) entry->index);
4079                 } else {
4080                         fprintf(stderr, "-INVALID-");
4081                 }
4082         }
4083         fprintf(stderr, "  (");
4084         print_type(path->top_type);
4085         fprintf(stderr, ")");
4086 }
4087
4088 static type_path_entry_t *get_type_path_top(const type_path_t *path)
4089 {
4090         size_t len = ARR_LEN(path->path);
4091         assert(len > 0);
4092         return & path->path[len-1];
4093 }
4094
4095 static type_path_entry_t *append_to_type_path(type_path_t *path)
4096 {
4097         size_t len = ARR_LEN(path->path);
4098         ARR_RESIZE(type_path_entry_t, path->path, len+1);
4099
4100         type_path_entry_t *result = & path->path[len];
4101         memset(result, 0, sizeof(result[0]));
4102         return result;
4103 }
4104
4105 static size_t get_compound_member_count(const compound_type_t *type)
4106 {
4107         compound_t *compound  = type->compound;
4108         size_t      n_members = 0;
4109         entity_t   *member    = compound->members.entities;
4110         for ( ; member != NULL; member = member->base.next) {
4111                 ++n_members;
4112         }
4113
4114         return n_members;
4115 }
4116
4117 static ir_initializer_t *get_initializer_entry(type_path_t *path)
4118 {
4119         type_t *orig_top_type = path->top_type;
4120         type_t *top_type      = skip_typeref(orig_top_type);
4121
4122         assert(is_type_compound(top_type) || is_type_array(top_type));
4123
4124         if (ARR_LEN(path->path) == 0) {
4125                 return NULL;
4126         } else {
4127                 type_path_entry_t *top         = get_type_path_top(path);
4128                 ir_initializer_t  *initializer = top->initializer;
4129                 return get_initializer_compound_value(initializer, top->index);
4130         }
4131 }
4132
4133 static void descend_into_subtype(type_path_t *path)
4134 {
4135         type_t *orig_top_type = path->top_type;
4136         type_t *top_type      = skip_typeref(orig_top_type);
4137
4138         assert(is_type_compound(top_type) || is_type_array(top_type));
4139
4140         ir_initializer_t *initializer = get_initializer_entry(path);
4141
4142         type_path_entry_t *top = append_to_type_path(path);
4143         top->type              = top_type;
4144
4145         size_t len;
4146
4147         if (is_type_compound(top_type)) {
4148                 compound_t *const compound = top_type->compound.compound;
4149                 entity_t   *const entry    = skip_unnamed_bitfields(compound->members.entities);
4150
4151                 top->compound_entry = entry;
4152                 top->index          = 0;
4153                 len                 = get_compound_member_count(&top_type->compound);
4154                 if (entry != NULL) {
4155                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4156                         path->top_type = entry->declaration.type;
4157                 }
4158         } else {
4159                 assert(is_type_array(top_type));
4160                 assert(top_type->array.size > 0);
4161
4162                 top->index     = 0;
4163                 path->top_type = top_type->array.element_type;
4164                 len            = top_type->array.size;
4165         }
4166         if (initializer == NULL
4167                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
4168                 initializer = create_initializer_compound(len);
4169                 /* we have to set the entry at the 2nd latest path entry... */
4170                 size_t path_len = ARR_LEN(path->path);
4171                 assert(path_len >= 1);
4172                 if (path_len > 1) {
4173                         type_path_entry_t *entry        = & path->path[path_len-2];
4174                         ir_initializer_t  *tinitializer = entry->initializer;
4175                         set_initializer_compound_value(tinitializer, entry->index,
4176                                                        initializer);
4177                 }
4178         }
4179         top->initializer = initializer;
4180 }
4181
4182 static void ascend_from_subtype(type_path_t *path)
4183 {
4184         type_path_entry_t *top = get_type_path_top(path);
4185
4186         path->top_type = top->type;
4187
4188         size_t len = ARR_LEN(path->path);
4189         ARR_RESIZE(type_path_entry_t, path->path, len-1);
4190 }
4191
4192 static void walk_designator(type_path_t *path, const designator_t *designator)
4193 {
4194         /* designators start at current object type */
4195         ARR_RESIZE(type_path_entry_t, path->path, 1);
4196
4197         for ( ; designator != NULL; designator = designator->next) {
4198                 type_path_entry_t *top         = get_type_path_top(path);
4199                 type_t            *orig_type   = top->type;
4200                 type_t            *type        = skip_typeref(orig_type);
4201
4202                 if (designator->symbol != NULL) {
4203                         assert(is_type_compound(type));
4204                         size_t    index  = 0;
4205                         symbol_t *symbol = designator->symbol;
4206
4207                         compound_t *compound = type->compound.compound;
4208                         entity_t   *iter     = compound->members.entities;
4209                         for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
4210                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
4211
4212                         /* revert previous initialisations of other union elements */
4213                         if (type->kind == TYPE_COMPOUND_UNION) {
4214                                 ir_initializer_t *initializer = top->initializer;
4215                                 if (initializer != NULL
4216                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
4217                                         /* are we writing to a new element? */
4218                                         ir_initializer_t *oldi
4219                                                 = get_initializer_compound_value(initializer, index);
4220                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
4221                                                 /* clear initializer */
4222                                                 size_t len
4223                                                         = get_initializer_compound_n_entries(initializer);
4224                                                 ir_initializer_t *nulli = get_initializer_null();
4225                                                 for (size_t i = 0; i < len; ++i) {
4226                                                         set_initializer_compound_value(initializer, i,
4227                                                                                        nulli);
4228                                                 }
4229                                         }
4230                                 }
4231                         }
4232
4233                         top->type           = orig_type;
4234                         top->compound_entry = iter;
4235                         top->index          = index;
4236                         orig_type           = iter->declaration.type;
4237                 } else {
4238                         expression_t *array_index = designator->array_index;
4239                         assert(is_type_array(type));
4240
4241                         long index = fold_constant_to_int(array_index);
4242                         assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
4243
4244                         top->type  = orig_type;
4245                         top->index = (size_t) index;
4246                         orig_type  = type->array.element_type;
4247                 }
4248                 path->top_type = orig_type;
4249
4250                 if (designator->next != NULL) {
4251                         descend_into_subtype(path);
4252                 }
4253         }
4254
4255         path->invalid  = false;
4256 }
4257
4258 static void advance_current_object(type_path_t *path)
4259 {
4260         if (path->invalid) {
4261                 /* TODO: handle this... */
4262                 panic("invalid initializer (excessive elements)");
4263         }
4264
4265         type_path_entry_t *top = get_type_path_top(path);
4266
4267         type_t *type = skip_typeref(top->type);
4268         if (is_type_union(type)) {
4269                 /* only the first element is initialized in unions */
4270                 top->compound_entry = NULL;
4271         } else if (is_type_struct(type)) {
4272                 entity_t *entry = top->compound_entry;
4273
4274                 top->index++;
4275                 entry               = skip_unnamed_bitfields(entry->base.next);
4276                 top->compound_entry = entry;
4277                 if (entry != NULL) {
4278                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4279                         path->top_type = entry->declaration.type;
4280                         return;
4281                 }
4282         } else {
4283                 assert(is_type_array(type));
4284
4285                 top->index++;
4286                 if (!type->array.size_constant || top->index < type->array.size) {
4287                         return;
4288                 }
4289         }
4290
4291         /* we're past the last member of the current sub-aggregate, try if we
4292          * can ascend in the type hierarchy and continue with another subobject */
4293         size_t len = ARR_LEN(path->path);
4294
4295         if (len > 1) {
4296                 ascend_from_subtype(path);
4297                 advance_current_object(path);
4298         } else {
4299                 path->invalid = true;
4300         }
4301 }
4302
4303
4304 static ir_initializer_t *create_ir_initializer_value(
4305                 const initializer_value_t *initializer)
4306 {
4307         expression_t *expr = initializer->value;
4308         type_t       *type = skip_typeref(expr->base.type);
4309
4310         if (is_type_compound(type)) {
4311                 if (expr->kind == EXPR_UNARY_CAST) {
4312                         expr = expr->unary.value;
4313                         type = skip_typeref(expr->base.type);
4314                 }
4315                 /* must be a compound literal... */
4316                 if (expr->kind == EXPR_COMPOUND_LITERAL) {
4317                         return create_ir_initializer(expr->compound_literal.initializer,
4318                                                      type);
4319                 }
4320         } else if (is_type_complex(type)) {
4321                 complex_value     const value     = expression_to_complex(expr);
4322                 ir_mode          *const mode      = get_complex_mode_storage(type);
4323                 ir_node          *const real      = create_conv(NULL, value.real, mode);
4324                 ir_node          *const imag      = create_conv(NULL, value.imag, mode);
4325                 ir_initializer_t *const res       = create_initializer_compound(2);
4326                 ir_initializer_t *const init_real = create_initializer_const(real);
4327                 ir_initializer_t *const init_imag = create_initializer_const(imag);
4328                 set_initializer_compound_value(res, 0, init_real);
4329                 set_initializer_compound_value(res, 1, init_imag);
4330                 return res;
4331         }
4332
4333         ir_node *value = expression_to_value(expr);
4334         value = conv_to_storage_type(NULL, value, type);
4335         return create_initializer_const(value);
4336 }
4337
4338 /** Tests whether type can be initialized by a string constant */
4339 static bool is_string_type(type_t *type)
4340 {
4341         if (!is_type_array(type))
4342                 return false;
4343
4344         type_t *const inner = skip_typeref(type->array.element_type);
4345         return is_type_integer(inner);
4346 }
4347
4348 static ir_initializer_t *create_ir_initializer_list(
4349                 const initializer_list_t *initializer, type_t *type)
4350 {
4351         type_path_t path;
4352         memset(&path, 0, sizeof(path));
4353         path.top_type = type;
4354         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4355
4356         descend_into_subtype(&path);
4357
4358         for (size_t i = 0; i < initializer->len; ++i) {
4359                 const initializer_t *sub_initializer = initializer->initializers[i];
4360
4361                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4362                         walk_designator(&path, sub_initializer->designator.designator);
4363                         continue;
4364                 }
4365
4366                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4367                         const expression_t *expr      = sub_initializer->value.value;
4368                         const type_t       *expr_type = skip_typeref(expr->base.type);
4369                         /* we might have to descend into types until the types match */
4370                         while (true) {
4371                                 type_t *orig_top_type = path.top_type;
4372                                 type_t *top_type      = skip_typeref(orig_top_type);
4373
4374                                 if (types_compatible(top_type, expr_type))
4375                                         break;
4376                                 descend_into_subtype(&path);
4377                         }
4378                 } else if (sub_initializer->kind == INITIALIZER_STRING) {
4379                         /* we might have to descend into types until we're at a scalar
4380                          * type */
4381                         while (true) {
4382                                 type_t *orig_top_type = path.top_type;
4383                                 type_t *top_type      = skip_typeref(orig_top_type);
4384
4385                                 if (is_string_type(top_type))
4386                                         break;
4387                                 descend_into_subtype(&path);
4388                         }
4389                 }
4390
4391                 ir_initializer_t *sub_irinitializer
4392                         = create_ir_initializer(sub_initializer, path.top_type);
4393
4394                 size_t path_len = ARR_LEN(path.path);
4395                 assert(path_len >= 1);
4396                 type_path_entry_t *entry        = & path.path[path_len-1];
4397                 ir_initializer_t  *tinitializer = entry->initializer;
4398                 set_initializer_compound_value(tinitializer, entry->index,
4399                                                sub_irinitializer);
4400
4401                 advance_current_object(&path);
4402         }
4403
4404         assert(ARR_LEN(path.path) >= 1);
4405         ir_initializer_t *result = path.path[0].initializer;
4406         DEL_ARR_F(path.path);
4407
4408         return result;
4409 }
4410
4411 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
4412 {
4413         type = skip_typeref(type);
4414
4415         assert(type->kind == TYPE_ARRAY);
4416         assert(type->array.size_constant);
4417         string_literal_expression_t const *const str = get_init_string(init);
4418         size_t            const str_len = str->value.size;
4419         size_t            const arr_len = type->array.size;
4420         ir_initializer_t *const irinit  = create_initializer_compound(arr_len);
4421         ir_mode          *const mode    = get_ir_mode_storage(type->array.element_type);
4422         char const       *      p       = str->value.begin;
4423         switch (str->value.encoding) {
4424         case STRING_ENCODING_CHAR:
4425         case STRING_ENCODING_UTF8:
4426                 for (size_t i = 0; i != arr_len; ++i) {
4427                         char              const c      = i < str_len ? *p++ : 0;
4428                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
4429                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4430                         set_initializer_compound_value(irinit, i, tvinit);
4431                 }
4432                 break;
4433
4434         case STRING_ENCODING_CHAR16:
4435         case STRING_ENCODING_CHAR32:
4436         case STRING_ENCODING_WIDE:
4437                 for (size_t i = 0; i != arr_len; ++i) {
4438                         utf32             const c      = i < str_len ? read_utf8_char(&p) : 0;
4439                         ir_tarval        *const tv     = new_tarval_from_long(c, mode);
4440                         ir_initializer_t *const tvinit = create_initializer_tarval(tv);
4441                         set_initializer_compound_value(irinit, i, tvinit);
4442                 }
4443                 break;
4444         }
4445
4446         return irinit;
4447 }
4448
4449 static ir_initializer_t *create_ir_initializer(
4450                 const initializer_t *initializer, type_t *type)
4451 {
4452         switch (initializer->kind) {
4453                 case INITIALIZER_STRING:
4454                         return create_ir_initializer_string(initializer, type);
4455
4456                 case INITIALIZER_LIST:
4457                         return create_ir_initializer_list(&initializer->list, type);
4458
4459                 case INITIALIZER_VALUE:
4460                         return create_ir_initializer_value(&initializer->value);
4461
4462                 case INITIALIZER_DESIGNATOR:
4463                         panic("unexpected designator initializer");
4464         }
4465         panic("unknown initializer");
4466 }
4467
4468 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4469  *  are elements [...] the remainder of the aggregate shall be initialized
4470  *  implicitly the same as objects that have static storage duration. */
4471 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4472                 ir_node *base_addr)
4473 {
4474         /* for unions we must NOT do anything for null initializers */
4475         ir_type *owner = get_entity_owner(entity);
4476         if (is_Union_type(owner)) {
4477                 return;
4478         }
4479
4480         ir_type *ent_type = get_entity_type(entity);
4481         /* create sub-initializers for a compound type */
4482         if (is_compound_type(ent_type)) {
4483                 unsigned n_members = get_compound_n_members(ent_type);
4484                 for (unsigned n = 0; n < n_members; ++n) {
4485                         ir_entity *member = get_compound_member(ent_type, n);
4486                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4487                                                                 member);
4488                         create_dynamic_null_initializer(member, dbgi, addr);
4489                 }
4490                 return;
4491         }
4492         if (is_Array_type(ent_type)) {
4493                 assert(has_array_upper_bound(ent_type, 0));
4494                 long n = get_array_upper_bound_int(ent_type, 0);
4495                 for (long i = 0; i < n; ++i) {
4496                         ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4497                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4498                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4499                         ir_node   *in[1]    = { cnst };
4500                         ir_entity *arrent   = get_array_element_entity(ent_type);
4501                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4502                                                         arrent);
4503                         create_dynamic_null_initializer(arrent, dbgi, addr);
4504                 }
4505                 return;
4506         }
4507
4508         ir_mode *value_mode = get_type_mode(ent_type);
4509         ir_node *node       = new_Const(get_mode_null(value_mode));
4510
4511         /* is it a bitfield type? */
4512         if (is_Primitive_type(ent_type) &&
4513                         get_primitive_base_type(ent_type) != NULL) {
4514                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4515                 return;
4516         }
4517
4518         ir_node *mem    = get_store();
4519         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4520         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4521         set_store(proj_m);
4522 }
4523
4524 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4525                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4526 {
4527         switch (get_initializer_kind(initializer)) {
4528         case IR_INITIALIZER_NULL:
4529                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4530                 return;
4531         case IR_INITIALIZER_CONST: {
4532                 ir_node *node     = get_initializer_const_value(initializer);
4533                 ir_type *ent_type = get_entity_type(entity);
4534
4535                 /* is it a bitfield type? */
4536                 if (is_Primitive_type(ent_type) &&
4537                                 get_primitive_base_type(ent_type) != NULL) {
4538                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4539                         return;
4540                 }
4541
4542                 ir_node *mem = get_store();
4543                 ir_node *new_mem;
4544                 if (is_compound_type(ent_type)) {
4545                         ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
4546                         new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4547                 } else {
4548                         assert(get_type_mode(type) == get_irn_mode(node));
4549                         ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4550                         new_mem = new_Proj(store, mode_M, pn_Store_M);
4551                 }
4552                 set_store(new_mem);
4553                 return;
4554         }
4555         case IR_INITIALIZER_TARVAL: {
4556                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4557                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4558                 ir_type   *ent_type = get_entity_type(entity);
4559
4560                 /* is it a bitfield type? */
4561                 if (is_Primitive_type(ent_type) &&
4562                                 get_primitive_base_type(ent_type) != NULL) {
4563                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4564                         return;
4565                 }
4566
4567                 assert(get_type_mode(type) == get_tarval_mode(tv));
4568                 ir_node *mem    = get_store();
4569                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4570                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4571                 set_store(proj_m);
4572                 return;
4573         }
4574         case IR_INITIALIZER_COMPOUND: {
4575                 assert(is_compound_type(type) || is_Array_type(type));
4576                 int n_members;
4577                 if (is_Array_type(type)) {
4578                         assert(has_array_upper_bound(type, 0));
4579                         n_members = get_array_upper_bound_int(type, 0);
4580                 } else {
4581                         n_members = get_compound_n_members(type);
4582                 }
4583
4584                 if (get_initializer_compound_n_entries(initializer)
4585                                 != (unsigned) n_members)
4586                         panic("initializer doesn't match compound type");
4587
4588                 for (int i = 0; i < n_members; ++i) {
4589                         ir_node   *addr;
4590                         ir_type   *irtype;
4591                         ir_entity *sub_entity;
4592                         if (is_Array_type(type)) {
4593                                 ir_mode   *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4594                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4595                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4596                                 ir_node   *in[1]    = { cnst };
4597                                 irtype     = get_array_element_type(type);
4598                                 sub_entity = get_array_element_entity(type);
4599                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4600                                                        sub_entity);
4601                         } else {
4602                                 sub_entity = get_compound_member(type, i);
4603                                 irtype     = get_entity_type(sub_entity);
4604                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4605                                                              sub_entity);
4606                         }
4607
4608                         ir_initializer_t *sub_init
4609                                 = get_initializer_compound_value(initializer, i);
4610
4611                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4612                                                        addr);
4613                 }
4614                 return;
4615         }
4616         }
4617
4618         panic("invalid ir_initializer");
4619 }
4620
4621 static void create_dynamic_initializer(ir_initializer_t *initializer,
4622                 dbg_info *dbgi, ir_entity *entity)
4623 {
4624         ir_node *frame     = get_irg_frame(current_ir_graph);
4625         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4626         ir_type *type      = get_entity_type(entity);
4627
4628         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4629 }
4630
4631 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4632                                      ir_entity *entity, type_t *type)
4633 {
4634         ir_node *memory = get_store();
4635         ir_node *nomem  = new_NoMem();
4636         ir_node *frame  = get_irg_frame(current_ir_graph);
4637         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4638
4639         if (initializer->kind == INITIALIZER_VALUE) {
4640                 initializer_value_t *initializer_value = &initializer->value;
4641
4642                 ir_node *value = expression_to_value(initializer_value->value);
4643                 type = skip_typeref(type);
4644                 assign_value(dbgi, addr, type, value);
4645                 return;
4646         }
4647
4648         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4649                 ir_initializer_t *irinitializer
4650                         = create_ir_initializer(initializer, type);
4651
4652                 create_dynamic_initializer(irinitializer, dbgi, entity);
4653                 return;
4654         }
4655
4656         /* create a "template" entity which is copied to the entity on the stack */
4657         ir_entity *const init_entity
4658                 = create_initializer_entity(dbgi, initializer, type);
4659         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4660         ir_type *const irtype   = get_ir_type(type);
4661         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4662
4663         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4664         set_store(copyb_mem);
4665 }
4666
4667 static void create_initializer_local_variable_entity(entity_t *entity)
4668 {
4669         assert(entity->kind == ENTITY_VARIABLE);
4670         initializer_t *initializer = entity->variable.initializer;
4671         dbg_info      *dbgi        = get_dbg_info(&entity->base.pos);
4672         ir_entity     *irentity    = entity->variable.v.entity;
4673         type_t        *type        = entity->declaration.type;
4674
4675         create_local_initializer(initializer, dbgi, irentity, type);
4676 }
4677
4678 static void create_variable_initializer(entity_t *entity)
4679 {
4680         assert(entity->kind == ENTITY_VARIABLE);
4681         initializer_t *initializer = entity->variable.initializer;
4682         if (entity->variable.alias != NULL) {
4683                 const namespace_tag_t namespc = (namespace_tag_t)entity->base.namespc;
4684                 entity_t *a = entity->variable.alias->entity;
4685                 for (; a != NULL; a = a->base.symbol_next) {
4686                         if ((namespace_tag_t)a->base.namespc == namespc)
4687                                 break;
4688                 }
4689                 assert(a != NULL && a->kind == ENTITY_VARIABLE && a->variable.v.entity != NULL);
4690                 set_entity_alias(entity->variable.v.entity, a->variable.v.entity);
4691                 /* prevent usage assumption to be made about aliased variables */
4692                 add_entity_linkage(a->variable.v.entity, IR_LINKAGE_HIDDEN_USER);
4693         }
4694         if (initializer == NULL)
4695                 return;
4696
4697         declaration_kind_t declaration_kind
4698                 = (declaration_kind_t) entity->declaration.kind;
4699         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4700                 create_initializer_local_variable_entity(entity);
4701                 return;
4702         }
4703
4704         type_t            *type = entity->declaration.type;
4705         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4706
4707         if (initializer->kind == INITIALIZER_VALUE) {
4708                 expression_t *      value     = initializer->value.value;
4709                 type_t       *const init_type = skip_typeref(value->base.type);
4710
4711                 if (is_type_complex(init_type)) {
4712                         complex_value nodes = expression_to_complex(value);
4713                         dbg_info     *dbgi  = get_dbg_info(&entity->base.pos);
4714                         ir_mode      *mode  = get_complex_mode_storage(init_type);
4715                         ir_node      *real  = create_conv(dbgi, nodes.real, mode);
4716                         ir_node      *imag  = create_conv(dbgi, nodes.imag, mode);
4717                         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4718                                 set_value(entity->variable.v.value_number, real);
4719                                 set_value(entity->variable.v.value_number+1, imag);
4720                         } else {
4721                                 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4722                                 ir_entity *irentity = entity->variable.v.entity;
4723                                 if (tq & TYPE_QUALIFIER_CONST
4724                                                 && get_entity_owner(irentity) != get_tls_type()) {
4725                                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4726                                 }
4727                                 ir_initializer_t *complex_init = create_initializer_compound(2);
4728                                 ir_initializer_t *reali = create_initializer_const(real);
4729                                 set_initializer_compound_value(complex_init, 0, reali);
4730                                 ir_initializer_t *imagi = create_initializer_const(imag);
4731                                 set_initializer_compound_value(complex_init, 1, imagi);
4732                                 set_entity_initializer(irentity, complex_init);
4733                         }
4734                         return;
4735                 } else if (!is_type_scalar(init_type)) {
4736                         if (value->kind != EXPR_COMPOUND_LITERAL)
4737                                 panic("expected non-scalar initializer to be a compound literal");
4738                         initializer = value->compound_literal.initializer;
4739                         goto have_initializer;
4740                 }
4741
4742                 ir_node  *      node = expression_to_value(value);
4743                 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4744                 node = conv_to_storage_type(dbgi, node, init_type);
4745
4746                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4747                         set_value(entity->variable.v.value_number, node);
4748                 } else {
4749                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4750
4751                         ir_entity *irentity = entity->variable.v.entity;
4752
4753                         if (tq & TYPE_QUALIFIER_CONST
4754                                         && get_entity_owner(irentity) != get_tls_type()) {
4755                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4756                         }
4757                         set_atomic_ent_value(irentity, node);
4758                 }
4759         } else {
4760 have_initializer:
4761                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4762                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4763
4764                 ir_entity        *irentity        = entity->variable.v.entity;
4765                 ir_initializer_t *irinitializer
4766                         = create_ir_initializer(initializer, type);
4767
4768                 if (tq & TYPE_QUALIFIER_CONST) {
4769                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4770                 }
4771                 set_entity_initializer(irentity, irinitializer);
4772         }
4773 }
4774
4775 static void create_variable_length_array(entity_t *entity)
4776 {
4777         assert(entity->kind == ENTITY_VARIABLE);
4778         assert(entity->variable.initializer == NULL);
4779
4780         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4781         entity->variable.v.vla_base = NULL;
4782
4783         /* TODO: record VLA somewhere so we create the free node when we leave
4784          * it's scope */
4785 }
4786
4787 static void allocate_variable_length_array(entity_t *entity)
4788 {
4789         assert(entity->kind == ENTITY_VARIABLE);
4790         assert(entity->variable.initializer == NULL);
4791         assert(currently_reachable());
4792
4793         dbg_info *dbgi      = get_dbg_info(&entity->base.pos);
4794         type_t   *type      = entity->declaration.type;
4795         ir_type  *el_type   = get_ir_type(type->array.element_type);
4796
4797         /* make sure size_node is calculated */
4798         get_type_size_node(type);
4799         ir_node  *elems = type->array.size_node;
4800         ir_node  *mem   = get_store();
4801         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4802
4803         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4804         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4805         set_store(proj_m);
4806
4807         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4808         entity->variable.v.vla_base = addr;
4809 }
4810
4811 static bool var_needs_entity(variable_t const *const var)
4812 {
4813         if (var->address_taken)
4814                 return true;
4815         type_t *const type = skip_typeref(var->base.type);
4816         return (!is_type_scalar(type) && !is_type_complex(type))
4817              || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4818 }
4819
4820 /**
4821  * Creates a Firm local variable from a declaration.
4822  */
4823 static void create_local_variable(entity_t *entity)
4824 {
4825         assert(entity->kind == ENTITY_VARIABLE);
4826         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4827
4828         if (!var_needs_entity(&entity->variable)) {
4829                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4830                 entity->variable.v.value_number = next_value_number_function;
4831                 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4832                 ++next_value_number_function;
4833                 if (is_type_complex(skip_typeref(entity->declaration.type)))
4834                         ++next_value_number_function;
4835                 return;
4836         }
4837
4838         /* is it a variable length array? */
4839         type_t *const type = skip_typeref(entity->declaration.type);
4840         if (is_type_array(type) && !type->array.size_constant) {
4841                 create_variable_length_array(entity);
4842                 return;
4843         }
4844
4845         ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4846         create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4847 }
4848
4849 static void create_local_static_variable(entity_t *entity)
4850 {
4851         assert(entity->kind == ENTITY_VARIABLE);
4852         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4853
4854         type_t   *type           = skip_typeref(entity->declaration.type);
4855         ir_type  *const var_type = entity->variable.thread_local ?
4856                 get_tls_type() : get_glob_type();
4857         ir_type  *const irtype   = get_ir_type(type);
4858         dbg_info *const dbgi     = get_dbg_info(&entity->base.pos);
4859
4860         size_t l = strlen(entity->base.symbol->string);
4861         char   buf[l + sizeof(".%u")];
4862         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4863         ident     *const id       = id_unique(buf);
4864         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4865
4866         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4867                 set_entity_volatility(irentity, volatility_is_volatile);
4868         }
4869
4870         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4871         entity->variable.v.entity = irentity;
4872
4873         set_entity_ld_ident(irentity, id);
4874         set_entity_visibility(irentity, ir_visibility_local);
4875
4876         if (entity->variable.initializer == NULL) {
4877                 ir_initializer_t *null_init = get_initializer_null();
4878                 set_entity_initializer(irentity, null_init);
4879         }
4880
4881         PUSH_IRG(get_const_code_irg());
4882         create_variable_initializer(entity);
4883         POP_IRG();
4884 }
4885
4886 static ir_node *return_statement_to_firm(return_statement_t *statement)
4887 {
4888         if (!currently_reachable())
4889                 return NULL;
4890
4891         dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4892         type_t   *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4893
4894         ir_node *in[1];
4895         int in_len;
4896         if (is_type_void(type)) {
4897                 /* just create the side effects, don't return anything */
4898                 if (statement->value)
4899                         evaluate_expression_discard_result(statement->value);
4900                 in[0]  = NULL;
4901                 in_len = 0;
4902         } else if (is_type_complex(type)) {
4903                 if (statement->value) {
4904                         complex_value value = expression_to_complex(statement->value);
4905                         in[0] = complex_to_memory(dbgi, type, value);
4906                 } else {
4907                         in[0] = new_Unknown(mode_P_data);
4908                 }
4909                 in_len = 1;
4910         } else {
4911                 ir_mode *const mode = get_ir_mode_storage(type);
4912                 if (statement->value) {
4913                         ir_node *value = expression_to_value(statement->value);
4914                         value = conv_to_storage_type(dbgi, value, type);
4915                         in[0] = create_conv(dbgi, value, mode);
4916                 } else {
4917                         in[0] = new_Unknown(mode);
4918                 }
4919                 in_len = 1;
4920         }
4921
4922         ir_node *const store = get_store();
4923         ir_node *const ret   = new_d_Return(dbgi, store, in_len, in);
4924
4925         ir_node *end_block = get_irg_end_block(current_ir_graph);
4926         add_immBlock_pred(end_block, ret);
4927
4928         set_unreachable_now();
4929         return NULL;
4930 }
4931
4932 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4933 {
4934         if (!currently_reachable())
4935                 return NULL;
4936
4937         expression_t *expression = statement->expression;
4938         type_t       *type       = skip_typeref(expression->base.type);
4939         if (is_type_complex(type)) {
4940                 expression_to_complex(expression);
4941                 return NULL;
4942         } else {
4943                 return expression_to_value(statement->expression);
4944         }
4945 }
4946
4947 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4948 {
4949         create_local_declarations(compound->scope.entities);
4950
4951         ir_node     *result    = NULL;
4952         statement_t *statement = compound->statements;
4953         for ( ; statement != NULL; statement = statement->base.next) {
4954                 result = statement_to_firm(statement);
4955         }
4956
4957         return result;
4958 }
4959
4960 static void create_global_variable(entity_t *entity)
4961 {
4962         ir_linkage          linkage    = IR_LINKAGE_DEFAULT;
4963         ir_visibility       visibility = ir_visibility_external;
4964         storage_class_tag_t storage
4965                 = (storage_class_tag_t)entity->declaration.storage_class;
4966         decl_modifiers_t    modifiers  = entity->declaration.modifiers;
4967         assert(entity->kind == ENTITY_VARIABLE);
4968
4969         switch (storage) {
4970         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4971         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4972         case STORAGE_CLASS_NONE:   visibility = ir_visibility_external; break;
4973         case STORAGE_CLASS_TYPEDEF:
4974         case STORAGE_CLASS_AUTO:
4975         case STORAGE_CLASS_REGISTER:
4976                 panic("invalid storage class for global var");
4977         }
4978
4979         /* "common" symbols */
4980         if (storage == STORAGE_CLASS_NONE
4981             && entity->variable.initializer == NULL
4982             && !entity->variable.thread_local
4983             && (modifiers & DM_WEAK) == 0) {
4984                 linkage |= IR_LINKAGE_MERGE;
4985         }
4986
4987         ir_type *var_type = get_glob_type();
4988         if (entity->variable.thread_local) {
4989                 var_type = get_tls_type();
4990         }
4991         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4992         ir_entity *irentity = entity->variable.v.entity;
4993         add_entity_linkage(irentity, linkage);
4994         set_entity_visibility(irentity, visibility);
4995         if (entity->variable.initializer == NULL
4996             && storage != STORAGE_CLASS_EXTERN) {
4997                 ir_initializer_t *null_init = get_initializer_null();
4998                 set_entity_initializer(irentity, null_init);
4999         }
5000 }
5001
5002 static void create_local_declaration(entity_t *entity)
5003 {
5004         assert(is_declaration(entity));
5005
5006         /* construct type */
5007         (void) get_ir_type(entity->declaration.type);
5008         if (entity->base.symbol == NULL) {
5009                 return;
5010         }
5011
5012         switch ((storage_class_tag_t) entity->declaration.storage_class) {
5013         case STORAGE_CLASS_STATIC:
5014                 if (entity->kind == ENTITY_FUNCTION) {
5015                         (void)get_function_entity(entity, NULL);
5016                 } else {
5017                         create_local_static_variable(entity);
5018                 }
5019                 return;
5020         case STORAGE_CLASS_EXTERN:
5021                 if (entity->kind == ENTITY_FUNCTION) {
5022                         assert(entity->function.body == NULL);
5023                         (void)get_function_entity(entity, NULL);
5024                 } else {
5025                         create_global_variable(entity);
5026                         create_variable_initializer(entity);
5027                 }
5028                 return;
5029         case STORAGE_CLASS_NONE:
5030         case STORAGE_CLASS_AUTO:
5031         case STORAGE_CLASS_REGISTER:
5032                 if (entity->kind == ENTITY_FUNCTION) {
5033                         if (entity->function.body != NULL) {
5034                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
5035                                 (void)get_function_entity(entity, owner);
5036                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
5037                                 enqueue_inner_function(entity);
5038                         } else {
5039                                 (void)get_function_entity(entity, NULL);
5040                         }
5041                 } else {
5042                         create_local_variable(entity);
5043                 }
5044                 return;
5045         case STORAGE_CLASS_TYPEDEF:
5046                 break;
5047         }
5048         panic("invalid storage class");
5049 }
5050
5051 static void create_local_declarations(entity_t *e)
5052 {
5053         for (; e; e = e->base.next) {
5054                 if (is_declaration(e))
5055                         create_local_declaration(e);
5056         }
5057 }
5058
5059 static void initialize_local_declaration(entity_t *entity)
5060 {
5061         if (entity->base.symbol == NULL)
5062                 return;
5063
5064         // no need to emit code in dead blocks
5065         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
5066                         && !currently_reachable())
5067                 return;
5068
5069         switch ((declaration_kind_t) entity->declaration.kind) {
5070         case DECLARATION_KIND_LOCAL_VARIABLE:
5071         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
5072                 create_variable_initializer(entity);
5073                 return;
5074
5075         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
5076                 allocate_variable_length_array(entity);
5077                 return;
5078
5079         case DECLARATION_KIND_COMPOUND_MEMBER:
5080         case DECLARATION_KIND_GLOBAL_VARIABLE:
5081         case DECLARATION_KIND_FUNCTION:
5082         case DECLARATION_KIND_INNER_FUNCTION:
5083                 return;
5084
5085         case DECLARATION_KIND_PARAMETER:
5086         case DECLARATION_KIND_PARAMETER_ENTITY:
5087                 panic("can't initialize parameters");
5088
5089         case DECLARATION_KIND_UNKNOWN:
5090                 panic("can't initialize unknown declaration");
5091         }
5092         panic("invalid declaration kind");
5093 }
5094
5095 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
5096 {
5097         entity_t *entity = statement->declarations_begin;
5098         if (entity == NULL)
5099                 return NULL;
5100
5101         entity_t *const last = statement->declarations_end;
5102         for ( ;; entity = entity->base.next) {
5103                 if (is_declaration(entity)) {
5104                         initialize_local_declaration(entity);
5105                 } else if (entity->kind == ENTITY_TYPEDEF) {
5106                         /* §6.7.7:3  Any array size expressions associated with variable length
5107                          * array declarators are evaluated each time the declaration of the
5108                          * typedef name is reached in the order of execution. */
5109                         type_t *const type = skip_typeref(entity->typedefe.type);
5110                         if (is_type_array(type) && type->array.is_vla)
5111                                 get_vla_size(&type->array);
5112                 }
5113                 if (entity == last)
5114                         break;
5115         }
5116
5117         return NULL;
5118 }
5119
5120 static ir_node *if_statement_to_firm(if_statement_t *statement)
5121 {
5122         create_local_declarations(statement->scope.entities);
5123
5124         /* Create the condition. */
5125         jump_target true_target;
5126         jump_target false_target;
5127         init_jump_target(&true_target,  NULL);
5128         init_jump_target(&false_target, NULL);
5129         if (currently_reachable())
5130                 expression_to_control_flow(statement->condition, &true_target, &false_target);
5131
5132         jump_target exit_target;
5133         init_jump_target(&exit_target, NULL);
5134
5135         /* Create the true statement. */
5136         enter_jump_target(&true_target);
5137         statement_to_firm(statement->true_statement);
5138         jump_to_target(&exit_target);
5139
5140         /* Create the false statement. */
5141         enter_jump_target(&false_target);
5142         if (statement->false_statement)
5143                 statement_to_firm(statement->false_statement);
5144         jump_to_target(&exit_target);
5145
5146         enter_jump_target(&exit_target);
5147         return NULL;
5148 }
5149
5150 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
5151 {
5152         create_local_declarations(statement->scope.entities);
5153
5154         PUSH_BREAK(NULL);
5155         PUSH_CONTINUE(NULL);
5156
5157         expression_t *const cond = statement->condition;
5158         /* Avoid an explicit body block in case of do ... while (0);. */
5159         if (is_constant_expression(cond) != EXPR_CLASS_VARIABLE && !fold_constant_to_bool(cond)) {
5160                 /* do ... while (0);. */
5161                 statement_to_firm(statement->body);
5162                 jump_to_target(&continue_target);
5163                 enter_jump_target(&continue_target);
5164                 jump_to_target(&break_target);
5165         } else {
5166                 jump_target body_target;
5167                 init_jump_target(&body_target, NULL);
5168                 jump_to_target(&body_target);
5169                 enter_immature_jump_target(&body_target);
5170                 keep_loop();
5171                 statement_to_firm(statement->body);
5172                 jump_to_target(&continue_target);
5173                 if (enter_jump_target(&continue_target))
5174                         expression_to_control_flow(statement->condition, &body_target, &break_target);
5175                 enter_jump_target(&body_target);
5176         }
5177         enter_jump_target(&break_target);
5178
5179         POP_CONTINUE();
5180         POP_BREAK();
5181         return NULL;
5182 }
5183
5184 static ir_node *for_statement_to_firm(for_statement_t *statement)
5185 {
5186         create_local_declarations(statement->scope.entities);
5187
5188         if (currently_reachable()) {
5189                 entity_t *entity = statement->scope.entities;
5190                 for ( ; entity != NULL; entity = entity->base.next) {
5191                         if (!is_declaration(entity))
5192                                 continue;
5193
5194                         initialize_local_declaration(entity);
5195                 }
5196
5197                 if (statement->initialisation != NULL) {
5198                         expression_to_value(statement->initialisation);
5199                 }
5200         }
5201
5202         /* Create the header block */
5203         jump_target header_target;
5204         init_jump_target(&header_target, NULL);
5205         jump_to_target(&header_target);
5206         enter_immature_jump_target(&header_target);
5207         keep_loop();
5208
5209         expression_t *const step = statement->step;
5210         PUSH_BREAK(NULL);
5211         PUSH_CONTINUE(step ? NULL : header_target.block);
5212
5213         /* Create the condition. */
5214         expression_t *const cond = statement->condition;
5215         if (cond && (is_constant_expression(cond) == EXPR_CLASS_VARIABLE || !fold_constant_to_bool(cond))) {
5216                 jump_target body_target;
5217                 init_jump_target(&body_target, NULL);
5218                 expression_to_control_flow(cond, &body_target, &break_target);
5219                 enter_jump_target(&body_target);
5220         }
5221
5222         /* Create the loop body. */
5223         statement_to_firm(statement->body);
5224         jump_to_target(&continue_target);
5225
5226         /* Create the step code. */
5227         if (step && enter_jump_target(&continue_target)) {
5228                 expression_to_value(step);
5229                 jump_to_target(&header_target);
5230         }
5231
5232         enter_jump_target(&header_target);
5233         enter_jump_target(&break_target);
5234
5235         POP_CONTINUE();
5236         POP_BREAK();
5237         return NULL;
5238 }
5239
5240 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
5241 {
5242         /* determine number of cases */
5243         size_t n_cases = 0;
5244         for (case_label_statement_t *l = statement->first_case; l != NULL;
5245              l = l->next) {
5246                 /* default case */
5247                 if (l->expression == NULL)
5248                         continue;
5249                 if (l->is_empty_range)
5250                         continue;
5251                 ++n_cases;
5252         }
5253
5254         ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
5255         size_t           i   = 0;
5256         for (case_label_statement_t *l = statement->first_case; l != NULL;
5257              l = l->next) {
5258             if (l->expression == NULL) {
5259                         l->pn = pn_Switch_default;
5260                         continue;
5261                 }
5262                 if (l->is_empty_range)
5263                         continue;
5264                 ir_tarval *min = l->first_case;
5265                 ir_tarval *max = l->last_case;
5266                 long       pn  = (long) i+1;
5267                 ir_switch_table_set(res, i++, min, max, pn);
5268                 l->pn = pn;
5269         }
5270         return res;
5271 }
5272
5273 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
5274 {
5275         dbg_info *dbgi        = get_dbg_info(&statement->base.pos);
5276         ir_node  *switch_node = NULL;
5277
5278         if (currently_reachable()) {
5279                 ir_node *expression = expression_to_value(statement->expression);
5280                 ir_switch_table *table = create_switch_table(statement);
5281                 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
5282
5283                 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
5284         }
5285
5286         set_unreachable_now();
5287
5288         PUSH_BREAK(NULL);
5289         ir_node *const old_switch            = current_switch;
5290         const bool     old_saw_default_label = saw_default_label;
5291         saw_default_label                    = false;
5292         current_switch                       = switch_node;
5293
5294         statement_to_firm(statement->body);
5295         jump_to_target(&break_target);
5296
5297         if (!saw_default_label && switch_node) {
5298                 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
5299                 add_pred_to_jump_target(&break_target, proj);
5300         }
5301
5302         enter_jump_target(&break_target);
5303
5304         assert(current_switch == switch_node);
5305         current_switch    = old_switch;
5306         saw_default_label = old_saw_default_label;
5307         POP_BREAK();
5308         return NULL;
5309 }
5310
5311 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
5312 {
5313         if (current_switch != NULL && !statement->is_empty_range) {
5314                 jump_target case_target;
5315                 init_jump_target(&case_target, NULL);
5316
5317                 /* Fallthrough from previous case */
5318                 jump_to_target(&case_target);
5319
5320                 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
5321                 add_pred_to_jump_target(&case_target, proj);
5322                 if (statement->expression == NULL)
5323                         saw_default_label = true;
5324
5325                 enter_jump_target(&case_target);
5326         }
5327
5328         return statement_to_firm(statement->statement);
5329 }
5330
5331 static ir_node *label_to_firm(const label_statement_t *statement)
5332 {
5333         label_t *const label = statement->label;
5334         prepare_label_target(label);
5335         jump_to_target(&label->target);
5336         if (--label->n_users == 0) {
5337                 enter_jump_target(&label->target);
5338         } else {
5339                 enter_immature_jump_target(&label->target);
5340                 keep_loop();
5341         }
5342
5343         return statement_to_firm(statement->statement);
5344 }
5345
5346 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
5347 {
5348         label_t *const label = stmt->label;
5349         prepare_label_target(label);
5350         jump_to_target(&label->target);
5351         if (--label->n_users == 0)
5352                 enter_jump_target(&label->target);
5353         set_unreachable_now();
5354         return NULL;
5355 }
5356
5357 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
5358 {
5359         if (currently_reachable()) {
5360                 ir_node *const op = expression_to_value(statement->expression);
5361                 ARR_APP1(ir_node*, ijmp_ops, op);
5362                 jump_to_target(&ijmp_target);
5363                 set_unreachable_now();
5364         }
5365         return NULL;
5366 }
5367
5368 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
5369 {
5370         bool           needs_memory = statement->is_volatile;
5371         size_t         n_clobbers   = 0;
5372         asm_clobber_t *clobber      = statement->clobbers;
5373         for ( ; clobber != NULL; clobber = clobber->next) {
5374                 const char *clobber_str = clobber->clobber.begin;
5375
5376                 if (!be_is_valid_clobber(clobber_str)) {
5377                         errorf(&statement->base.pos,
5378                                    "invalid clobber '%s' specified", clobber->clobber);
5379                         continue;
5380                 }
5381
5382                 if (streq(clobber_str, "memory")) {
5383                         needs_memory = true;
5384                         continue;
5385                 }
5386
5387                 ident *id = new_id_from_str(clobber_str);
5388                 obstack_ptr_grow(&asm_obst, id);
5389                 ++n_clobbers;
5390         }
5391         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5392         ident **clobbers = NULL;
5393         if (n_clobbers > 0) {
5394                 clobbers = obstack_finish(&asm_obst);
5395         }
5396
5397         size_t n_inputs  = 0;
5398         asm_argument_t *argument = statement->inputs;
5399         for ( ; argument != NULL; argument = argument->next)
5400                 n_inputs++;
5401         size_t n_outputs = 0;
5402         argument = statement->outputs;
5403         for ( ; argument != NULL; argument = argument->next)
5404                 n_outputs++;
5405
5406         unsigned next_pos = 0;
5407
5408         ir_node *ins[n_inputs + n_outputs + 1];
5409         size_t   in_size = 0;
5410
5411         ir_asm_constraint tmp_in_constraints[n_outputs];
5412
5413         const expression_t *out_exprs[n_outputs];
5414         ir_node            *out_addrs[n_outputs];
5415         size_t              out_size = 0;
5416
5417         argument = statement->outputs;
5418         for ( ; argument != NULL; argument = argument->next) {
5419                 const char *constraints = argument->constraints.begin;
5420                 asm_constraint_flags_t asm_flags
5421                         = be_parse_asm_constraints(constraints);
5422
5423                 {
5424                         position_t const *const pos = &statement->base.pos;
5425                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5426                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5427                         }
5428                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5429                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5430                                 continue;
5431                         }
5432                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5433                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5434                                 continue;
5435                         }
5436                 }
5437
5438                 unsigned pos = next_pos++;
5439                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5440                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5441                         expression_t *expr = argument->expression;
5442                         ir_node      *addr = expression_to_addr(expr);
5443                         /* in+output, construct an artifical same_as constraint on the
5444                          * input */
5445                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5446                                 char     buf[64];
5447                                 ir_node *value = get_value_from_lvalue(expr, addr);
5448
5449                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5450
5451                                 ir_asm_constraint constraint;
5452                                 constraint.pos              = pos;
5453                                 constraint.constraint       = new_id_from_str(buf);
5454                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5455                                 tmp_in_constraints[in_size] = constraint;
5456                                 ins[in_size] = value;
5457
5458                                 ++in_size;
5459                         }
5460
5461                         out_exprs[out_size] = expr;
5462                         out_addrs[out_size] = addr;
5463                         ++out_size;
5464                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5465                         /* pure memory ops need no input (but we have to make sure we
5466                          * attach to the memory) */
5467                         assert(! (asm_flags &
5468                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5469                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5470                         needs_memory = true;
5471
5472                         /* we need to attach the address to the inputs */
5473                         expression_t *expr = argument->expression;
5474
5475                         ir_asm_constraint constraint;
5476                         constraint.pos              = pos;
5477                         constraint.constraint       = new_id_from_str(constraints);
5478                         constraint.mode             = mode_M;
5479                         tmp_in_constraints[in_size] = constraint;
5480
5481                         ins[in_size] = expression_to_addr(expr);
5482                         ++in_size;
5483                         continue;
5484                 } else {
5485                         errorf(&statement->base.pos,
5486                                "only modifiers but no place set in constraints '%s'",
5487                                constraints);
5488                         continue;
5489                 }
5490
5491                 ir_asm_constraint constraint;
5492                 constraint.pos        = pos;
5493                 constraint.constraint = new_id_from_str(constraints);
5494                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5495
5496                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5497         }
5498         assert(obstack_object_size(&asm_obst)
5499                         == out_size * sizeof(ir_asm_constraint));
5500         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5501
5502
5503         obstack_grow(&asm_obst, tmp_in_constraints,
5504                      in_size * sizeof(tmp_in_constraints[0]));
5505         /* find and count input and output arguments */
5506         argument = statement->inputs;
5507         for ( ; argument != NULL; argument = argument->next) {
5508                 const char *constraints = argument->constraints.begin;
5509                 asm_constraint_flags_t asm_flags
5510                         = be_parse_asm_constraints(constraints);
5511
5512                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5513                         errorf(&statement->base.pos,
5514                                "some constraints in '%s' are not supported", constraints);
5515                         continue;
5516                 }
5517                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5518                         errorf(&statement->base.pos,
5519                                "some constraints in '%s' are invalid", constraints);
5520                         continue;
5521                 }
5522                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5523                         errorf(&statement->base.pos,
5524                                "write flag specified for input constraints '%s'",
5525                                constraints);
5526                         continue;
5527                 }
5528
5529                 ir_node *input;
5530                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5531                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5532                         /* we can treat this as "normal" input */
5533                         input = expression_to_value(argument->expression);
5534                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5535                         /* pure memory ops need no input (but we have to make sure we
5536                          * attach to the memory) */
5537                         assert(! (asm_flags &
5538                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5539                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5540                         needs_memory = true;
5541                         input = expression_to_addr(argument->expression);
5542                 } else {
5543                         errorf(&statement->base.pos,
5544                                "only modifiers but no place set in constraints '%s'",
5545                                constraints);
5546                         continue;
5547                 }
5548
5549                 ir_asm_constraint constraint;
5550                 constraint.pos        = next_pos++;
5551                 constraint.constraint = new_id_from_str(constraints);
5552                 constraint.mode       = get_irn_mode(input);
5553
5554                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5555                 ins[in_size++] = input;
5556         }
5557
5558         ir_node *mem = needs_memory ? get_store() : new_NoMem();
5559         assert(obstack_object_size(&asm_obst)
5560                         == in_size * sizeof(ir_asm_constraint));
5561         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5562
5563         /* create asm node */
5564         dbg_info *dbgi = get_dbg_info(&statement->base.pos);
5565
5566         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5567
5568         ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
5569                                   out_size, output_constraints,
5570                                   n_clobbers, clobbers, asm_text);
5571
5572         if (statement->is_volatile) {
5573                 set_irn_pinned(node, op_pin_state_pinned);
5574         } else {
5575                 set_irn_pinned(node, op_pin_state_floats);
5576         }
5577
5578         /* create output projs & connect them */
5579         if (needs_memory) {
5580                 ir_node *projm = new_Proj(node, mode_M, out_size);
5581                 set_store(projm);
5582         }
5583
5584         size_t i;
5585         for (i = 0; i < out_size; ++i) {
5586                 const expression_t *out_expr = out_exprs[i];
5587                 long                pn       = i;
5588                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5589                 ir_node            *proj     = new_Proj(node, mode, pn);
5590                 ir_node            *addr     = out_addrs[i];
5591
5592                 set_value_for_expression_addr(out_expr, proj, addr);
5593         }
5594
5595         return NULL;
5596 }
5597
5598 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
5599 {
5600         statement_to_firm(statement->try_statement);
5601         position_t const *const pos = &statement->base.pos;
5602         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5603         return NULL;
5604 }
5605
5606 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
5607 {
5608         errorf(&statement->base.pos, "__leave not supported yet");
5609         return NULL;
5610 }
5611
5612 /**
5613  * Transform a statement.
5614  */
5615 static ir_node *statement_to_firm(statement_t *const stmt)
5616 {
5617 #ifndef NDEBUG
5618         assert(!stmt->base.transformed);
5619         stmt->base.transformed = true;
5620 #endif
5621
5622         switch (stmt->kind) {
5623         case STATEMENT_ASM:           return asm_statement_to_firm(        &stmt->asms);
5624         case STATEMENT_CASE_LABEL:    return case_label_to_firm(           &stmt->case_label);
5625         case STATEMENT_COMPOUND:      return compound_statement_to_firm(   &stmt->compound);
5626         case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm(        &stmt->computed_goto);
5627         case STATEMENT_DECLARATION:   return declaration_statement_to_firm(&stmt->declaration);
5628         case STATEMENT_DO_WHILE:      return do_while_statement_to_firm(   &stmt->do_while);
5629         case STATEMENT_EMPTY:         return NULL; /* nothing */
5630         case STATEMENT_EXPRESSION:    return expression_statement_to_firm( &stmt->expression);
5631         case STATEMENT_FOR:           return for_statement_to_firm(        &stmt->fors);
5632         case STATEMENT_GOTO:          return goto_statement_to_firm(       &stmt->gotos);
5633         case STATEMENT_IF:            return if_statement_to_firm(         &stmt->ifs);
5634         case STATEMENT_LABEL:         return label_to_firm(                &stmt->label);
5635         case STATEMENT_LEAVE:         return leave_statement_to_firm(      &stmt->leave);
5636         case STATEMENT_MS_TRY:        return ms_try_statement_to_firm(     &stmt->ms_try);
5637         case STATEMENT_RETURN:        return return_statement_to_firm(     &stmt->returns);
5638         case STATEMENT_SWITCH:        return switch_statement_to_firm(     &stmt->switchs);
5639
5640         {
5641                 jump_target *tgt;
5642         case STATEMENT_BREAK:    tgt = &break_target;    goto jump;
5643         case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5644 jump:
5645                 jump_to_target(tgt);
5646                 set_unreachable_now();
5647                 return NULL;
5648         }
5649
5650         case STATEMENT_ERROR: panic("error statement");
5651         }
5652         panic("statement not implemented");
5653 }
5654
5655 static int count_local_variables(const entity_t *entity,
5656                                  const entity_t *const last)
5657 {
5658         int count = 0;
5659         entity_t const *const end = last != NULL ? last->base.next : NULL;
5660         for (; entity != end; entity = entity->base.next) {
5661                 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5662                     !var_needs_entity(&entity->variable)) {
5663                     type_t *type = skip_typeref(entity->declaration.type);
5664                         count += is_type_complex(type) ? 2 : 1;
5665                 }
5666         }
5667         return count;
5668 }
5669
5670 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5671 {
5672         int *const count = env;
5673
5674         switch (stmt->kind) {
5675         case STATEMENT_DECLARATION: {
5676                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5677                 *count += count_local_variables(decl_stmt->declarations_begin,
5678                                 decl_stmt->declarations_end);
5679                 break;
5680         }
5681
5682         case STATEMENT_FOR:
5683                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5684                 break;
5685
5686         default:
5687                 break;
5688         }
5689 }
5690
5691 /**
5692  * Return the number of local (alias free) variables used by a function.
5693  */
5694 static int get_function_n_local_vars(entity_t *entity)
5695 {
5696         const function_t *function = &entity->function;
5697         int count = 0;
5698
5699         /* count parameters */
5700         count += count_local_variables(function->parameters.entities, NULL);
5701
5702         /* count local variables declared in body */
5703         walk_statements(function->body, count_local_variables_in_stmt, &count);
5704         return count;
5705 }
5706
5707 /**
5708  * Build Firm code for the parameters of a function.
5709  */
5710 static void initialize_function_parameters(entity_t *entity)
5711 {
5712         assert(entity->kind == ENTITY_FUNCTION);
5713         ir_graph *irg             = current_ir_graph;
5714         ir_node  *args            = get_irg_args(irg);
5715         int       n               = 0;
5716         ir_type  *function_irtype;
5717
5718         if (entity->function.need_closure) {
5719                 /* add an extra parameter for the static link */
5720                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5721                 ++n;
5722
5723                 /* Matze: IMO this is wrong, nested functions should have an own
5724                  * type and not rely on strange parameters... */
5725                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5726         } else {
5727                 function_irtype = get_ir_type(entity->declaration.type);
5728         }
5729
5730         entity_t *parameter = entity->function.parameters.entities;
5731         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5732                 if (parameter->kind != ENTITY_PARAMETER)
5733                         continue;
5734
5735                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5736                 type_t *type = skip_typeref(parameter->declaration.type);
5737
5738                 dbg_info *const dbgi         = get_dbg_info(&parameter->base.pos);
5739                 ir_type  *const param_irtype = get_method_param_type(function_irtype, n);
5740                 if (var_needs_entity(&parameter->variable)) {
5741                         ir_type   *frame_type = get_irg_frame_type(irg);
5742                         ir_entity *param
5743                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5744                         parameter->declaration.kind  = DECLARATION_KIND_PARAMETER_ENTITY;
5745                         parameter->variable.v.entity = param;
5746                 } else if (is_type_complex(type)) {
5747                         ir_type   *frame_type = get_irg_frame_type(irg);
5748                         ir_entity *param
5749                                 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5750                         ir_node   *nomem = get_irg_no_mem(irg);
5751                         ir_node   *frame = get_irg_frame(irg);
5752                         ir_node   *addr  = new_simpleSel(nomem, frame, param);
5753                         complex_value value = complex_deref_address(NULL, type, addr, cons_floats);
5754
5755                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5756                         parameter->variable.v.value_number = next_value_number_function;
5757                         set_irg_loc_description(irg, next_value_number_function,
5758                                                                         parameter);
5759                         set_irg_loc_description(irg, next_value_number_function+1,
5760                                                                         parameter);
5761                         set_value(next_value_number_function, value.real);
5762                         set_value(next_value_number_function+1, value.imag);
5763                         next_value_number_function += 2;
5764                 } else {
5765                         ir_mode *param_mode = get_type_mode(param_irtype);
5766                         long     pn         = n;
5767                         ir_node *value      = new_rd_Proj(dbgi, args, param_mode, pn);
5768                         value = conv_to_storage_type(dbgi, value, type);
5769
5770                         parameter->declaration.kind        = DECLARATION_KIND_PARAMETER;
5771                         parameter->variable.v.value_number = next_value_number_function;
5772                         set_irg_loc_description(irg, next_value_number_function,
5773                                                                         parameter);
5774                         ++next_value_number_function;
5775
5776                         set_value(parameter->variable.v.value_number, value);
5777                 }
5778         }
5779 }
5780
5781 static void add_function_pointer(ir_type *segment, ir_entity *method,
5782                                  const char *unique_template)
5783 {
5784         ir_type   *method_type  = get_entity_type(method);
5785         ir_type   *ptr_type     = new_type_pointer(method_type);
5786
5787         /* these entities don't really have a name but firm only allows
5788          * "" in ld_ident.
5789          * Note that we mustn't give these entities a name since for example
5790          * Mach-O doesn't allow them. */
5791         ident     *ide          = id_unique(unique_template);
5792         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5793         ir_graph  *irg          = get_const_code_irg();
5794         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5795                                                            method);
5796
5797         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5798         set_entity_compiler_generated(ptr, 1);
5799         set_entity_visibility(ptr, ir_visibility_private);
5800         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5801         set_atomic_ent_value(ptr, val);
5802 }
5803
5804 /**
5805  * Create code for a function and all inner functions.
5806  *
5807  * @param entity  the function entity
5808  */
5809 static void create_function(entity_t *entity)
5810 {
5811         assert(entity->kind == ENTITY_FUNCTION);
5812         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5813
5814         if (entity->function.alias != NULL) {
5815                 const namespace_tag_t namespc = (namespace_tag_t)entity->base.namespc;
5816                 entity_t *a = entity->function.alias->entity;
5817                 for (; a != NULL; a = a->base.symbol_next) {
5818                         if ((namespace_tag_t)a->base.namespc == namespc)
5819                                 break;
5820                 }
5821 // TODO: or use entitymap
5822 //              ir_entity *a = entitymap_get(&entitymap, entity->function.alias);
5823                 assert(a != NULL && a->kind == ENTITY_VARIABLE && a->function.irentity != NULL);
5824                 set_entity_alias(entity->function.irentity, a->function.irentity);
5825                 /* prevent usage assumption to be made about aliased functions */
5826                 add_entity_linkage(a->function.irentity, IR_LINKAGE_HIDDEN_USER);
5827         }
5828
5829         if (entity->function.body == NULL)
5830                 return;
5831
5832         inner_functions     = NULL;
5833         current_trampolines = NULL;
5834
5835         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5836                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5837                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5838         }
5839         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5840                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5841                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5842         }
5843
5844         current_function_entity = entity;
5845         current_function_name   = NULL;
5846         current_funcsig         = NULL;
5847
5848         assert(!ijmp_ops);
5849         assert(!ijmp_blocks);
5850         init_jump_target(&ijmp_target, NULL);
5851         ijmp_ops    = NEW_ARR_F(ir_node*, 0);
5852         ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5853
5854         int       n_local_vars = get_function_n_local_vars(entity);
5855         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5856         current_ir_graph = irg;
5857
5858         ir_graph *old_current_function = current_function;
5859         current_function = irg;
5860
5861         ir_entity *const old_current_vararg_entity = current_vararg_entity;
5862         current_vararg_entity = NULL;
5863
5864         set_irg_fp_model(irg, firm_fp_model);
5865         set_irn_dbg_info(get_irg_start_block(irg),
5866                          get_entity_dbg_info(function_entity));
5867
5868         next_value_number_function = 0;
5869         initialize_function_parameters(entity);
5870         current_static_link = entity->function.static_link;
5871
5872         statement_to_firm(entity->function.body);
5873
5874         ir_node *end_block = get_irg_end_block(irg);
5875
5876         /* do we have a return statement yet? */
5877         if (currently_reachable()) {
5878                 type_t *type = skip_typeref(entity->declaration.type);
5879                 assert(is_type_function(type));
5880                 type_t *const return_type = skip_typeref(type->function.return_type);
5881
5882                 ir_node *ret;
5883                 if (is_type_void(return_type)) {
5884                         ret = new_Return(get_store(), 0, NULL);
5885                 } else {
5886                         ir_mode *const mode = get_ir_mode_storage(return_type);
5887
5888                         ir_node *in[1];
5889                         /* §5.1.2.2.3 main implicitly returns 0 */
5890                         if (is_main(entity)) {
5891                                 in[0] = new_Const(get_mode_null(mode));
5892                         } else {
5893                                 in[0] = new_Unknown(mode);
5894                         }
5895                         ret = new_Return(get_store(), 1, in);
5896                 }
5897                 add_immBlock_pred(end_block, ret);
5898         }
5899
5900         if (enter_jump_target(&ijmp_target)) {
5901                 keep_loop();
5902                 size_t   const n    = ARR_LEN(ijmp_ops);
5903                 ir_node *const op   = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5904                 ir_node *const ijmp = new_IJmp(op);
5905                 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5906                         ir_node *const block = ijmp_blocks[i];
5907                         add_immBlock_pred(block, ijmp);
5908                         mature_immBlock(block);
5909                 }
5910         }
5911
5912         DEL_ARR_F(ijmp_ops);
5913         DEL_ARR_F(ijmp_blocks);
5914         ijmp_ops    = NULL;
5915         ijmp_blocks = NULL;
5916
5917         irg_finalize_cons(irg);
5918
5919         irg_verify(irg, VERIFY_ENFORCE_SSA);
5920         current_vararg_entity = old_current_vararg_entity;
5921         current_function      = old_current_function;
5922
5923         if (current_trampolines != NULL) {
5924                 DEL_ARR_F(current_trampolines);
5925                 current_trampolines = NULL;
5926         }
5927
5928         /* create inner functions if any */
5929         entity_t **inner = inner_functions;
5930         if (inner != NULL) {
5931                 ir_type *rem_outer_frame      = current_outer_frame;
5932                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5933                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5934                         create_function(inner[i]);
5935                 }
5936                 DEL_ARR_F(inner);
5937
5938                 current_outer_frame      = rem_outer_frame;
5939         }
5940 }
5941
5942 static void scope_to_firm(scope_t *scope)
5943 {
5944         /* first pass: create declarations */
5945         entity_t *entity = scope->entities;
5946         for ( ; entity != NULL; entity = entity->base.next) {
5947                 if (entity->base.symbol == NULL)
5948                         continue;
5949
5950                 if (entity->kind == ENTITY_FUNCTION) {
5951                         if (entity->function.btk != BUILTIN_NONE) {
5952                                 /* builtins have no representation */
5953                                 continue;
5954                         }
5955                         (void)get_function_entity(entity, NULL);
5956                 } else if (entity->kind == ENTITY_VARIABLE) {
5957                         create_global_variable(entity);
5958                 } else if (entity->kind == ENTITY_NAMESPACE) {
5959                         scope_to_firm(&entity->namespacee.members);
5960                 }
5961         }
5962
5963         /* second pass: create code/initializers */
5964         entity = scope->entities;
5965         for ( ; entity != NULL; entity = entity->base.next) {
5966                 if (entity->base.symbol == NULL)
5967                         continue;
5968
5969                 if (entity->kind == ENTITY_FUNCTION) {
5970                         if (entity->function.btk != BUILTIN_NONE) {
5971                                 /* builtins have no representation */
5972                                 continue;
5973                         }
5974                         create_function(entity);
5975                 } else if (entity->kind == ENTITY_VARIABLE) {
5976                         assert(entity->declaration.kind
5977                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5978                         current_ir_graph = get_const_code_irg();
5979                         create_variable_initializer(entity);
5980                 }
5981         }
5982 }
5983
5984 void init_ast2firm(void)
5985 {
5986         obstack_init(&asm_obst);
5987         init_atomic_modes();
5988
5989         ir_set_debug_retrieve(dbg_retrieve);
5990         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5991
5992         /* create idents for all known runtime functions */
5993         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5994                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5995         }
5996
5997         entitymap_init(&entitymap);
5998 }
5999
6000 static void init_ir_types(void)
6001 {
6002         static int ir_types_initialized = 0;
6003         if (ir_types_initialized)
6004                 return;
6005         ir_types_initialized = 1;
6006
6007         ir_type_char = get_ir_type(type_char);
6008
6009         be_params             = be_get_backend_param();
6010         mode_float_arithmetic = be_params->mode_float_arithmetic;
6011
6012         stack_param_align     = be_params->stack_param_align;
6013 }
6014
6015 void exit_ast2firm(void)
6016 {
6017         entitymap_destroy(&entitymap);
6018         obstack_free(&asm_obst, NULL);
6019 }
6020
6021 static void global_asm_to_firm(statement_t *s)
6022 {
6023         for (; s != NULL; s = s->base.next) {
6024                 assert(s->kind == STATEMENT_ASM);
6025
6026                 char const *const text = s->asms.asm_text.begin;
6027                 size_t      const size = s->asms.asm_text.size;
6028                 ident      *const id   = new_id_from_chars(text, size);
6029                 add_irp_asm(id);
6030         }
6031 }
6032
6033 static const char *get_cwd(void)
6034 {
6035         static char buf[1024];
6036         if (buf[0] == '\0') {
6037                 return getcwd(buf, sizeof(buf));
6038         }
6039         return buf;
6040 }
6041
6042 void translation_unit_to_firm(translation_unit_t *unit)
6043 {
6044         if (c_mode & _CXX) {
6045                 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
6046         } else if (c_mode & _C99) {
6047                 be_dwarf_set_source_language(DW_LANG_C99);
6048         } else if (c_mode & _C89) {
6049                 be_dwarf_set_source_language(DW_LANG_C89);
6050         } else {
6051                 be_dwarf_set_source_language(DW_LANG_C);
6052         }
6053         const char *cwd = get_cwd();
6054         if (cwd != NULL) {
6055                 be_dwarf_set_compilation_directory(cwd);
6056         }
6057
6058         /* initialize firm arithmetic */
6059         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6060         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6061
6062         /* just to be sure */
6063         init_jump_target(&break_target,    NULL);
6064         init_jump_target(&continue_target, NULL);
6065         current_switch           = NULL;
6066         current_translation_unit = unit;
6067
6068         init_ir_types();
6069
6070         scope_to_firm(&unit->scope);
6071         global_asm_to_firm(unit->global_asm);
6072
6073         current_ir_graph         = NULL;
6074         current_translation_unit = NULL;
6075 }