deps/v8/src/ic/ic.h

   1 // Copyright 2012 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef V8_IC_H_
   6 #define V8_IC_H_
   7
   8 #include "src/ic/ic-state.h"
   9 #include "src/macro-assembler.h"
  10
  11 namespace v8 {
  12 namespace internal {
  13
  14
  15 // IC_UTIL_LIST defines all utility functions called from generated
  16 // inline caching code. The argument for the macro, ICU, is the function name.
  17 #define IC_UTIL_LIST(ICU)              \
  18   ICU(LoadIC_Miss)                     \
  19   ICU(KeyedLoadIC_Miss)                \
  20   ICU(CallIC_Miss)                     \
  21   ICU(CallIC_Customization_Miss)       \
  22   ICU(StoreIC_Miss)                    \
  23   ICU(StoreIC_Slow)                    \
  24   ICU(KeyedStoreIC_Miss)               \
  25   ICU(KeyedStoreIC_Slow)               \
  26   /* Utilities for IC stubs. */        \
  27   ICU(StoreCallbackProperty)           \
  28   ICU(LoadPropertyWithInterceptorOnly) \
  29   ICU(LoadPropertyWithInterceptor)     \
  30   ICU(LoadElementWithInterceptor)      \
  31   ICU(StorePropertyWithInterceptor)    \
  32   ICU(CompareIC_Miss)                  \
  33   ICU(BinaryOpIC_Miss)                 \
  34   ICU(CompareNilIC_Miss)               \
  35   ICU(Unreachable)                     \
  36   ICU(ToBooleanIC_Miss)
  37 //
  38 // IC is the base class for LoadIC, StoreIC, KeyedLoadIC, and KeyedStoreIC.
  39 //
  40 class IC {
  41  public:
  42   // The ids for utility called from the generated code.
  43   enum UtilityId {
  44 #define CONST_NAME(name) k##name,
  45     IC_UTIL_LIST(CONST_NAME)
  46 #undef CONST_NAME
  47     kUtilityCount
  48   };
  49
  50   // Looks up the address of the named utility.
  51   static Address AddressFromUtilityId(UtilityId id);
  52
  53   // Alias the inline cache state type to make the IC code more readable.
  54   typedef InlineCacheState State;
  55
  56   // The IC code is either invoked with no extra frames on the stack
  57   // or with a single extra frame for supporting calls.
  58   enum FrameDepth { NO_EXTRA_FRAME = 0, EXTRA_CALL_FRAME = 1 };
  59
  60   // Construct the IC structure with the given number of extra
  61   // JavaScript frames on the stack.
  62   IC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL,
  63      bool for_queries_only = false);
  64   virtual ~IC() {}
  65
  66   State state() const { return state_; }
  67   inline Address address() const;
  68
  69   // Compute the current IC state based on the target stub, receiver and name.
  70   void UpdateState(Handle<Object> receiver, Handle<Object> name);
  71
  72   bool IsNameCompatibleWithPrototypeFailure(Handle<Object> name);
  73   void MarkPrototypeFailure(Handle<Object> name) {
  74     DCHECK(IsNameCompatibleWithPrototypeFailure(name));
  75     old_state_ = state_;
  76     state_ = PROTOTYPE_FAILURE;
  77   }
  78
  79   // Clear the inline cache to initial state.
  80   static void Clear(Isolate* isolate, Address address,
  81                     ConstantPoolArray* constant_pool);
  82
  83 #ifdef DEBUG
  84   bool IsLoadStub() const {
  85     return target()->is_load_stub() || target()->is_keyed_load_stub();
  86   }
  87
  88   bool IsStoreStub() const {
  89     return target()->is_store_stub() || target()->is_keyed_store_stub();
  90   }
  91
  92   bool IsCallStub() const { return target()->is_call_stub(); }
  93 #endif
  94
  95   static inline JSFunction* GetRootConstructor(Map* receiver_map,
  96                                                Context* native_context);
  97   static inline Handle<Map> GetHandlerCacheHolder(Handle<Map> receiver_map,
  98                                                   bool receiver_is_holder,
  99                                                   Isolate* isolate,
 100                                                   CacheHolderFlag* flag);
 101   static inline Handle<Map> GetICCacheHolder(Handle<Map> receiver_map,
 102                                              Isolate* isolate,
 103                                              CacheHolderFlag* flag);
 104
 105   static bool IsCleared(Code* code) {
 106     InlineCacheState state = code->ic_state();
 107     return state == UNINITIALIZED || state == PREMONOMORPHIC;
 108   }
 109
 110   static bool IsCleared(FeedbackNexus* nexus) {
 111     InlineCacheState state = nexus->StateFromFeedback();
 112     return state == UNINITIALIZED || state == PREMONOMORPHIC;
 113   }
 114
 115   static bool ICUseVector(Code::Kind kind) {
 116     return (FLAG_vector_ics &&
 117             (kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC)) ||
 118            kind == Code::CALL_IC;
 119   }
 120
 121  protected:
 122   // Get the call-site target; used for determining the state.
 123   Handle<Code> target() const { return target_; }
 124
 125   Address fp() const { return fp_; }
 126   Address pc() const { return *pc_address_; }
 127   Isolate* isolate() const { return isolate_; }
 128
 129   // Get the shared function info of the caller.
 130   SharedFunctionInfo* GetSharedFunctionInfo() const;
 131   // Get the code object of the caller.
 132   Code* GetCode() const;
 133   // Get the original (non-breakpointed) code object of the caller.
 134   Code* GetOriginalCode() const;
 135
 136   bool AddressIsOptimizedCode() const;
 137
 138   // Set the call-site target.
 139   inline void set_target(Code* code);
 140   bool is_target_set() { return target_set_; }
 141   bool is_vector_set() { return vector_set_; }
 142
 143   bool UseVector() const {
 144     bool use = ICUseVector(kind());
 145     // If we are supposed to use the nexus, verify the nexus is non-null.
 146     DCHECK(!use || nexus_ != NULL);
 147     return use;
 148   }
 149
 150   // Configure for most states.
 151   void ConfigureVectorState(IC::State new_state);
 152   // Configure the vector for MONOMORPHIC.
 153   void ConfigureVectorState(Handle<Name> name, Handle<Map> map,
 154                             Handle<Code> handler);
 155   // Configure the vector for POLYMORPHIC.
 156   void ConfigureVectorState(Handle<Name> name, MapHandleList* maps,
 157                             CodeHandleList* handlers);
 158
 159   char TransitionMarkFromState(IC::State state);
 160   void TraceIC(const char* type, Handle<Object> name);
 161   void TraceIC(const char* type, Handle<Object> name, State old_state,
 162                State new_state);
 163
 164   MaybeHandle<Object> TypeError(const char* type, Handle<Object> object,
 165                                 Handle<Object> key);
 166   MaybeHandle<Object> ReferenceError(const char* type, Handle<Name> name);
 167
 168   // Access the target code for the given IC address.
 169   static inline Code* GetTargetAtAddress(Address address,
 170                                          ConstantPoolArray* constant_pool);
 171   static inline void SetTargetAtAddress(Address address, Code* target,
 172                                         ConstantPoolArray* constant_pool);
 173   static void OnTypeFeedbackChanged(Isolate* isolate, Address address,
 174                                     State old_state, State new_state,
 175                                     bool target_remains_ic_stub);
 176   // As a vector-based IC, type feedback must be updated differently.
 177   static void OnTypeFeedbackChanged(Isolate* isolate, Code* host,
 178                                     TypeFeedbackVector* vector, State old_state,
 179                                     State new_state);
 180   static void PostPatching(Address address, Code* target, Code* old_target);
 181
 182   // Compute the handler either by compiling or by retrieving a cached version.
 183   Handle<Code> ComputeHandler(LookupIterator* lookup,
 184                               Handle<Object> value = Handle<Code>::null());
 185   virtual Handle<Code> CompileHandler(LookupIterator* lookup,
 186                                       Handle<Object> value,
 187                                       CacheHolderFlag cache_holder) {
 188     UNREACHABLE();
 189     return Handle<Code>::null();
 190   }
 191
 192   void UpdateMonomorphicIC(Handle<Code> handler, Handle<Name> name);
 193   bool UpdatePolymorphicIC(Handle<Name> name, Handle<Code> code);
 194   void UpdateMegamorphicCache(Map* map, Name* name, Code* code);
 195
 196   void CopyICToMegamorphicCache(Handle<Name> name);
 197   bool IsTransitionOfMonomorphicTarget(Map* source_map, Map* target_map);
 198   void PatchCache(Handle<Name> name, Handle<Code> code);
 199   Code::Kind kind() const { return kind_; }
 200   Code::Kind handler_kind() const {
 201     if (kind_ == Code::KEYED_LOAD_IC) return Code::LOAD_IC;
 202     DCHECK(kind_ == Code::LOAD_IC || kind_ == Code::STORE_IC ||
 203            kind_ == Code::KEYED_STORE_IC);
 204     return kind_;
 205   }
 206   virtual Handle<Code> megamorphic_stub() {
 207     UNREACHABLE();
 208     return Handle<Code>::null();
 209   }
 210
 211   bool TryRemoveInvalidPrototypeDependentStub(Handle<Object> receiver,
 212                                               Handle<String> name);
 213
 214   ExtraICState extra_ic_state() const { return extra_ic_state_; }
 215   void set_extra_ic_state(ExtraICState state) { extra_ic_state_ = state; }
 216
 217   Handle<Map> receiver_map() { return receiver_map_; }
 218   void update_receiver_map(Handle<Object> receiver) {
 219     if (receiver->IsSmi()) {
 220       receiver_map_ = isolate_->factory()->heap_number_map();
 221     } else {
 222       receiver_map_ = handle(HeapObject::cast(*receiver)->map());
 223     }
 224   }
 225
 226   void TargetMaps(MapHandleList* list) {
 227     FindTargetMaps();
 228     for (int i = 0; i < target_maps_.length(); i++) {
 229       list->Add(target_maps_.at(i));
 230     }
 231   }
 232
 233   Map* FirstTargetMap() {
 234     FindTargetMaps();
 235     return target_maps_.length() > 0 ? *target_maps_.at(0) : NULL;
 236   }
 237
 238   inline void UpdateTarget();
 239
 240   Handle<TypeFeedbackVector> vector() const { return nexus()->vector_handle(); }
 241   FeedbackVectorICSlot slot() const { return nexus()->slot(); }
 242   State saved_state() const {
 243     return state() == PROTOTYPE_FAILURE ? old_state_ : state();
 244   }
 245
 246   template <class NexusClass>
 247   NexusClass* casted_nexus() {
 248     return static_cast<NexusClass*>(nexus_);
 249   }
 250   FeedbackNexus* nexus() const { return nexus_; }
 251
 252   inline Code* get_host();
 253
 254  private:
 255   inline Code* raw_target() const;
 256   inline ConstantPoolArray* constant_pool() const;
 257   inline ConstantPoolArray* raw_constant_pool() const;
 258
 259   void FindTargetMaps() {
 260     if (target_maps_set_) return;
 261     target_maps_set_ = true;
 262     if (UseVector()) {
 263       nexus()->ExtractMaps(&target_maps_);
 264     } else {
 265       if (state_ == MONOMORPHIC) {
 266         Map* map = target_->FindFirstMap();
 267         if (map != NULL) target_maps_.Add(handle(map));
 268       } else if (state_ != UNINITIALIZED && state_ != PREMONOMORPHIC) {
 269         target_->FindAllMaps(&target_maps_);
 270       }
 271     }
 272   }
 273
 274   // Frame pointer for the frame that uses (calls) the IC.
 275   Address fp_;
 276
 277   // All access to the program counter of an IC structure is indirect
 278   // to make the code GC safe. This feature is crucial since
 279   // GetProperty and SetProperty are called and they in turn might
 280   // invoke the garbage collector.
 281   Address* pc_address_;
 282
 283   Isolate* isolate_;
 284
 285   // The constant pool of the code which originally called the IC (which might
 286   // be for the breakpointed copy of the original code).
 287   Handle<ConstantPoolArray> raw_constant_pool_;
 288
 289   // The original code target that missed.
 290   Handle<Code> target_;
 291   bool target_set_;
 292   bool vector_set_;
 293   State old_state_;  // For saving if we marked as prototype failure.
 294   State state_;
 295   Code::Kind kind_;
 296   Handle<Map> receiver_map_;
 297   MaybeHandle<Code> maybe_handler_;
 298
 299   ExtraICState extra_ic_state_;
 300   MapHandleList target_maps_;
 301   bool target_maps_set_;
 302
 303   FeedbackNexus* nexus_;
 304
 305   DISALLOW_IMPLICIT_CONSTRUCTORS(IC);
 306 };
 307
 308
 309 // An IC_Utility encapsulates IC::UtilityId. It exists mainly because you
 310 // cannot make forward declarations to an enum.
 311 class IC_Utility {
 312  public:
 313   explicit IC_Utility(IC::UtilityId id)
 314       : address_(IC::AddressFromUtilityId(id)), id_(id) {}
 315
 316   Address address() const { return address_; }
 317
 318   IC::UtilityId id() const { return id_; }
 319
 320  private:
 321   Address address_;
 322   IC::UtilityId id_;
 323 };
 324
 325
 326 class CallIC : public IC {
 327  public:
 328   CallIC(Isolate* isolate, CallICNexus* nexus)
 329       : IC(EXTRA_CALL_FRAME, isolate, nexus) {
 330     DCHECK(nexus != NULL);
 331   }
 332
 333   void PatchMegamorphic(Handle<Object> function);
 334
 335   void HandleMiss(Handle<Object> function);
 336
 337   // Returns true if a custom handler was installed.
 338   bool DoCustomHandler(Handle<Object> function,
 339                        const CallICState& callic_state);
 340
 341   // Code generator routines.
 342   static Handle<Code> initialize_stub(Isolate* isolate, int argc,
 343                                       CallICState::CallType call_type);
 344   static Handle<Code> initialize_stub_in_optimized_code(
 345       Isolate* isolate, int argc, CallICState::CallType call_type);
 346
 347   static void Clear(Isolate* isolate, Code* host, CallICNexus* nexus);
 348 };
 349
 350
 351 class LoadIC : public IC {
 352  public:
 353   static ExtraICState ComputeExtraICState(ContextualMode contextual_mode) {
 354     return LoadICState(contextual_mode).GetExtraICState();
 355   }
 356
 357   ContextualMode contextual_mode() const {
 358     return LoadICState::GetContextualMode(extra_ic_state());
 359   }
 360
 361   LoadIC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL)
 362       : IC(depth, isolate, nexus) {
 363     DCHECK(!FLAG_vector_ics || nexus != NULL);
 364     DCHECK(IsLoadStub());
 365   }
 366
 367   // TODO(mvstanton): The for_queries_only is because we have a case where we
 368   // construct an IC only to gather the contextual mode, and we don't have
 369   // vector/slot information. for_queries_only is a temporary hack to enable the
 370   // strong DCHECK protection around vector/slot.
 371   LoadIC(FrameDepth depth, Isolate* isolate, bool for_queries_only)
 372       : IC(depth, isolate, NULL, for_queries_only) {
 373     DCHECK(IsLoadStub());
 374   }
 375
 376   // Returns if this IC is for contextual (no explicit receiver)
 377   // access to properties.
 378   bool IsUndeclaredGlobal(Handle<Object> receiver) {
 379     if (receiver->IsGlobalObject()) {
 380       return contextual_mode() == CONTEXTUAL;
 381     } else {
 382       DCHECK(contextual_mode() != CONTEXTUAL);
 383       return false;
 384     }
 385   }
 386
 387   // Code generator routines.
 388   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
 389   static void GeneratePreMonomorphic(MacroAssembler* masm) {
 390     GenerateMiss(masm);
 391   }
 392   static void GenerateMiss(MacroAssembler* masm);
 393   static void GenerateNormal(MacroAssembler* masm);
 394   static void GenerateRuntimeGetProperty(MacroAssembler* masm);
 395
 396   static Handle<Code> initialize_stub(Isolate* isolate,
 397                                       ExtraICState extra_state);
 398   static Handle<Code> initialize_stub_in_optimized_code(
 399       Isolate* isolate, ExtraICState extra_state);
 400
 401   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
 402                                            Handle<Name> name);
 403
 404   static void Clear(Isolate* isolate, Code* host, LoadICNexus* nexus);
 405
 406  protected:
 407   inline void set_target(Code* code);
 408
 409   Handle<Code> slow_stub() const {
 410     if (kind() == Code::LOAD_IC) {
 411       return isolate()->builtins()->LoadIC_Slow();
 412     } else {
 413       DCHECK_EQ(Code::KEYED_LOAD_IC, kind());
 414       return isolate()->builtins()->KeyedLoadIC_Slow();
 415     }
 416   }
 417
 418   Handle<Code> megamorphic_stub() OVERRIDE;
 419
 420   // Update the inline cache and the global stub cache based on the
 421   // lookup result.
 422   void UpdateCaches(LookupIterator* lookup);
 423
 424   virtual Handle<Code> CompileHandler(LookupIterator* lookup,
 425                                       Handle<Object> unused,
 426                                       CacheHolderFlag cache_holder) OVERRIDE;
 427
 428  private:
 429   virtual Handle<Code> pre_monomorphic_stub() const;
 430   static Handle<Code> pre_monomorphic_stub(Isolate* isolate,
 431                                            ExtraICState extra_state);
 432
 433   Handle<Code> SimpleFieldLoad(FieldIndex index);
 434
 435   static void Clear(Isolate* isolate, Address address, Code* target,
 436                     ConstantPoolArray* constant_pool);
 437
 438   friend class IC;
 439 };
 440
 441
 442 class KeyedLoadIC : public LoadIC {
 443  public:
 444   // ExtraICState bits (building on IC)
 445   class IcCheckTypeField : public BitField<IcCheckType, 1, 1> {};
 446
 447   static ExtraICState ComputeExtraICState(ContextualMode contextual_mode,
 448                                           IcCheckType key_type) {
 449     return LoadICState(contextual_mode).GetExtraICState() |
 450            IcCheckTypeField::encode(key_type);
 451   }
 452
 453   static IcCheckType GetKeyType(ExtraICState extra_state) {
 454     return IcCheckTypeField::decode(extra_state);
 455   }
 456
 457   KeyedLoadIC(FrameDepth depth, Isolate* isolate,
 458               KeyedLoadICNexus* nexus = NULL)
 459       : LoadIC(depth, isolate, nexus) {
 460     DCHECK(!FLAG_vector_ics || nexus != NULL);
 461     DCHECK(target()->is_keyed_load_stub());
 462   }
 463
 464   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
 465                                            Handle<Object> key);
 466
 467   // Code generator routines.
 468   static void GenerateMiss(MacroAssembler* masm);
 469   static void GenerateRuntimeGetProperty(MacroAssembler* masm);
 470   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
 471   static void GeneratePreMonomorphic(MacroAssembler* masm) {
 472     GenerateMiss(masm);
 473   }
 474   static void GenerateMegamorphic(MacroAssembler* masm);
 475
 476   // Bit mask to be tested against bit field for the cases when
 477   // generic stub should go into slow case.
 478   // Access check is necessary explicitly since generic stub does not perform
 479   // map checks.
 480   static const int kSlowCaseBitFieldMask =
 481       (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
 482
 483   static Handle<Code> initialize_stub(Isolate* isolate);
 484   static Handle<Code> initialize_stub_in_optimized_code(Isolate* isolate);
 485   static Handle<Code> ChooseMegamorphicStub(Isolate* isolate);
 486   static Handle<Code> pre_monomorphic_stub(Isolate* isolate);
 487
 488   static void Clear(Isolate* isolate, Code* host, KeyedLoadICNexus* nexus);
 489
 490  protected:
 491   // receiver is HeapObject because it could be a String or a JSObject
 492   Handle<Code> LoadElementStub(Handle<HeapObject> receiver);
 493   virtual Handle<Code> pre_monomorphic_stub() const {
 494     return pre_monomorphic_stub(isolate());
 495   }
 496
 497  private:
 498   static void Clear(Isolate* isolate, Address address, Code* target,
 499                     ConstantPoolArray* constant_pool);
 500
 501   friend class IC;
 502 };
 503
 504
 505 class StoreIC : public IC {
 506  public:
 507   STATIC_ASSERT(i::LANGUAGE_END == 3);
 508   class LanguageModeState : public BitField<LanguageMode, 1, 2> {};
 509   static ExtraICState ComputeExtraICState(LanguageMode flag) {
 510     return LanguageModeState::encode(flag);
 511   }
 512   static LanguageMode GetLanguageMode(ExtraICState state) {
 513     return LanguageModeState::decode(state);
 514   }
 515
 516   // For convenience, a statically declared encoding of strict mode extra
 517   // IC state.
 518   static const ExtraICState kStrictModeState = STRICT
 519                                                << LanguageModeState::kShift;
 520
 521   StoreIC(FrameDepth depth, Isolate* isolate) : IC(depth, isolate) {
 522     DCHECK(IsStoreStub());
 523   }
 524
 525   LanguageMode language_mode() const {
 526     return LanguageModeState::decode(extra_ic_state());
 527   }
 528
 529   // Code generators for stub routines. Only called once at startup.
 530   static void GenerateSlow(MacroAssembler* masm);
 531   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
 532   static void GeneratePreMonomorphic(MacroAssembler* masm) {
 533     GenerateMiss(masm);
 534   }
 535   static void GenerateMiss(MacroAssembler* masm);
 536   static void GenerateMegamorphic(MacroAssembler* masm);
 537   static void GenerateNormal(MacroAssembler* masm);
 538   static void GenerateRuntimeSetProperty(MacroAssembler* masm,
 539                                          LanguageMode language_mode);
 540
 541   static Handle<Code> initialize_stub(Isolate* isolate,
 542                                       LanguageMode language_mode);
 543
 544   MUST_USE_RESULT MaybeHandle<Object> Store(
 545       Handle<Object> object, Handle<Name> name, Handle<Object> value,
 546       JSReceiver::StoreFromKeyed store_mode =
 547           JSReceiver::CERTAINLY_NOT_STORE_FROM_KEYED);
 548
 549   bool LookupForWrite(LookupIterator* it, Handle<Object> value,
 550                       JSReceiver::StoreFromKeyed store_mode);
 551
 552  protected:
 553   // Stub accessors.
 554   Handle<Code> megamorphic_stub() OVERRIDE;
 555   Handle<Code> slow_stub() const;
 556
 557   virtual Handle<Code> pre_monomorphic_stub() const {
 558     return pre_monomorphic_stub(isolate(), language_mode());
 559   }
 560
 561   static Handle<Code> pre_monomorphic_stub(Isolate* isolate,
 562                                            LanguageMode language_mode);
 563
 564   // Update the inline cache and the global stub cache based on the
 565   // lookup result.
 566   void UpdateCaches(LookupIterator* lookup, Handle<Object> value,
 567                     JSReceiver::StoreFromKeyed store_mode);
 568   virtual Handle<Code> CompileHandler(LookupIterator* lookup,
 569                                       Handle<Object> value,
 570                                       CacheHolderFlag cache_holder) OVERRIDE;
 571
 572  private:
 573   inline void set_target(Code* code);
 574
 575   static void Clear(Isolate* isolate, Address address, Code* target,
 576                     ConstantPoolArray* constant_pool);
 577
 578   friend class IC;
 579 };
 580
 581
 582 enum KeyedStoreCheckMap { kDontCheckMap, kCheckMap };
 583
 584
 585 enum KeyedStoreIncrementLength { kDontIncrementLength, kIncrementLength };
 586
 587
 588 class KeyedStoreIC : public StoreIC {
 589  public:
 590   // ExtraICState bits (building on IC)
 591   // ExtraICState bits
 592   // When more language modes are added, these BitFields need to move too.
 593   STATIC_ASSERT(i::LANGUAGE_END == 3);
 594   class ExtraICStateKeyedAccessStoreMode
 595       : public BitField<KeyedAccessStoreMode, 3, 4> {};  // NOLINT
 596
 597   class IcCheckTypeField : public BitField<IcCheckType, 7, 1> {};
 598
 599   static ExtraICState ComputeExtraICState(LanguageMode flag,
 600                                           KeyedAccessStoreMode mode) {
 601     return LanguageModeState::encode(flag) |
 602            ExtraICStateKeyedAccessStoreMode::encode(mode) |
 603            IcCheckTypeField::encode(ELEMENT);
 604   }
 605
 606   static KeyedAccessStoreMode GetKeyedAccessStoreMode(
 607       ExtraICState extra_state) {
 608     return ExtraICStateKeyedAccessStoreMode::decode(extra_state);
 609   }
 610
 611   static IcCheckType GetKeyType(ExtraICState extra_state) {
 612     return IcCheckTypeField::decode(extra_state);
 613   }
 614
 615   KeyedStoreIC(FrameDepth depth, Isolate* isolate) : StoreIC(depth, isolate) {
 616     DCHECK(target()->is_keyed_store_stub());
 617   }
 618
 619   MUST_USE_RESULT MaybeHandle<Object> Store(Handle<Object> object,
 620                                             Handle<Object> name,
 621                                             Handle<Object> value);
 622
 623   // Code generators for stub routines.  Only called once at startup.
 624   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
 625   static void GeneratePreMonomorphic(MacroAssembler* masm) {
 626     GenerateMiss(masm);
 627   }
 628   static void GenerateMiss(MacroAssembler* masm);
 629   static void GenerateSlow(MacroAssembler* masm);
 630   static void GenerateMegamorphic(MacroAssembler* masm,
 631                                   LanguageMode language_mode);
 632   static void GenerateSloppyArguments(MacroAssembler* masm);
 633
 634  protected:
 635   virtual Handle<Code> pre_monomorphic_stub() const {
 636     return pre_monomorphic_stub(isolate(), language_mode());
 637   }
 638   static Handle<Code> pre_monomorphic_stub(Isolate* isolate,
 639                                            LanguageMode language_mode) {
 640     if (is_strict(language_mode)) {
 641       return isolate->builtins()->KeyedStoreIC_PreMonomorphic_Strict();
 642     } else {
 643       return isolate->builtins()->KeyedStoreIC_PreMonomorphic();
 644     }
 645   }
 646
 647   Handle<Code> StoreElementStub(Handle<JSObject> receiver,
 648                                 KeyedAccessStoreMode store_mode);
 649
 650  private:
 651   inline void set_target(Code* code);
 652
 653   // Stub accessors.
 654   Handle<Code> sloppy_arguments_stub() {
 655     return isolate()->builtins()->KeyedStoreIC_SloppyArguments();
 656   }
 657
 658   static void Clear(Isolate* isolate, Address address, Code* target,
 659                     ConstantPoolArray* constant_pool);
 660
 661   KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver,
 662                                     Handle<Object> key, Handle<Object> value);
 663
 664   Handle<Map> ComputeTransitionedMap(Handle<Map> map,
 665                                      KeyedAccessStoreMode store_mode);
 666
 667   friend class IC;
 668 };
 669
 670
 671 // Type Recording BinaryOpIC, that records the types of the inputs and outputs.
 672 class BinaryOpIC : public IC {
 673  public:
 674   explicit BinaryOpIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
 675
 676   static Builtins::JavaScript TokenToJSBuiltin(Token::Value op);
 677
 678   MaybeHandle<Object> Transition(Handle<AllocationSite> allocation_site,
 679                                  Handle<Object> left,
 680                                  Handle<Object> right) WARN_UNUSED_RESULT;
 681 };
 682
 683
 684 class CompareIC : public IC {
 685  public:
 686   CompareIC(Isolate* isolate, Token::Value op)
 687       : IC(EXTRA_CALL_FRAME, isolate), op_(op) {}
 688
 689   // Update the inline cache for the given operands.
 690   Code* UpdateCaches(Handle<Object> x, Handle<Object> y);
 691
 692   // Helper function for computing the condition for a compare operation.
 693   static Condition ComputeCondition(Token::Value op);
 694
 695   // Factory method for getting an uninitialized compare stub.
 696   static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op);
 697
 698  private:
 699   static bool HasInlinedSmiCode(Address address);
 700
 701   bool strict() const { return op_ == Token::EQ_STRICT; }
 702   Condition GetCondition() const { return ComputeCondition(op_); }
 703
 704   static Code* GetRawUninitialized(Isolate* isolate, Token::Value op);
 705
 706   static void Clear(Isolate* isolate, Address address, Code* target,
 707                     ConstantPoolArray* constant_pool);
 708
 709   Token::Value op_;
 710
 711   friend class IC;
 712 };
 713
 714
 715 class CompareNilIC : public IC {
 716  public:
 717   explicit CompareNilIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
 718
 719   Handle<Object> CompareNil(Handle<Object> object);
 720
 721   static Handle<Code> GetUninitialized();
 722
 723   static void Clear(Address address, Code* target,
 724                     ConstantPoolArray* constant_pool);
 725
 726   static Handle<Object> DoCompareNilSlow(Isolate* isolate, NilValue nil,
 727                                          Handle<Object> object);
 728 };
 729
 730
 731 class ToBooleanIC : public IC {
 732  public:
 733   explicit ToBooleanIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
 734
 735   Handle<Object> ToBoolean(Handle<Object> object);
 736 };
 737
 738
 739 // Helper for BinaryOpIC and CompareIC.
 740 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 741 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 742
 743 DECLARE_RUNTIME_FUNCTION(KeyedLoadIC_MissFromStubFailure);
 744 DECLARE_RUNTIME_FUNCTION(KeyedStoreIC_MissFromStubFailure);
 745 DECLARE_RUNTIME_FUNCTION(UnaryOpIC_Miss);
 746 DECLARE_RUNTIME_FUNCTION(StoreIC_MissFromStubFailure);
 747 DECLARE_RUNTIME_FUNCTION(ElementsTransitionAndStoreIC_Miss);
 748 DECLARE_RUNTIME_FUNCTION(BinaryOpIC_Miss);
 749 DECLARE_RUNTIME_FUNCTION(BinaryOpIC_MissWithAllocationSite);
 750 DECLARE_RUNTIME_FUNCTION(CompareNilIC_Miss);
 751 DECLARE_RUNTIME_FUNCTION(ToBooleanIC_Miss);
 752 DECLARE_RUNTIME_FUNCTION(LoadIC_MissFromStubFailure);
 753
 754 // Support functions for callbacks handlers.
 755 DECLARE_RUNTIME_FUNCTION(StoreCallbackProperty);
 756
 757 // Support functions for interceptor handlers.
 758 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptorOnly);
 759 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptor);
 760 DECLARE_RUNTIME_FUNCTION(LoadElementWithInterceptor);
 761 DECLARE_RUNTIME_FUNCTION(StorePropertyWithInterceptor);
 762 }
 763 }  // namespace v8::internal
 764
 765 #endif  // V8_IC_H_