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// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_IC_H_
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#define V8_IC_H_
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#include "macro-assembler.h"
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#include "type-info.h"
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namespace v8 {
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namespace internal {
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// IC_UTIL_LIST defines all utility functions called from generated
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// inline caching code. The argument for the macro, ICU, is the function name.
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#define IC_UTIL_LIST(ICU) \
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ICU(LoadIC_Miss) \
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ICU(KeyedLoadIC_Miss) \
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ICU(KeyedLoadIC_MissForceGeneric) \
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ICU(CallIC_Miss) \
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ICU(KeyedCallIC_Miss) \
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ICU(StoreIC_Miss) \
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ICU(StoreIC_ArrayLength) \
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ICU(SharedStoreIC_ExtendStorage) \
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ICU(KeyedStoreIC_Miss) \
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ICU(KeyedStoreIC_MissForceGeneric) \
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ICU(KeyedStoreIC_Slow) \
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/* Utilities for IC stubs. */ \
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ICU(LoadCallbackProperty) \
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ICU(StoreCallbackProperty) \
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ICU(LoadPropertyWithInterceptorOnly) \
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ICU(LoadPropertyWithInterceptorForLoad) \
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ICU(LoadPropertyWithInterceptorForCall) \
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ICU(KeyedLoadPropertyWithInterceptor) \
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ICU(StoreInterceptorProperty) \
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ICU(UnaryOp_Patch) \
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ICU(BinaryOp_Patch) \
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ICU(CompareIC_Miss) \
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ICU(ToBoolean_Patch)
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//
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// IC is the base class for LoadIC, StoreIC, CallIC, KeyedLoadIC,
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// and KeyedStoreIC.
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//
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class IC {
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public:
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// The ids for utility called from the generated code.
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enum UtilityId {
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#define CONST_NAME(name) k##name,
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IC_UTIL_LIST(CONST_NAME)
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#undef CONST_NAME
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kUtilityCount
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};
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// Looks up the address of the named utility.
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static Address AddressFromUtilityId(UtilityId id);
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// Alias the inline cache state type to make the IC code more readable.
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typedef InlineCacheState State;
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// The IC code is either invoked with no extra frames on the stack
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// or with a single extra frame for supporting calls.
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enum FrameDepth {
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NO_EXTRA_FRAME = 0,
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EXTRA_CALL_FRAME = 1
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};
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// Construct the IC structure with the given number of extra
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// JavaScript frames on the stack.
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IC(FrameDepth depth, Isolate* isolate);
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virtual ~IC() {}
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// Get the call-site target; used for determining the state.
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Code* target() const { return GetTargetAtAddress(address()); }
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inline Address address() const;
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virtual bool IsGeneric() const { return false; }
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// Compute the current IC state based on the target stub, receiver and name.
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static State StateFrom(Code* target, Object* receiver, Object* name);
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// Clear the inline cache to initial state.
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static void Clear(Address address);
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// Computes the reloc info for this IC. This is a fairly expensive
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// operation as it has to search through the heap to find the code
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// object that contains this IC site.
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RelocInfo::Mode ComputeMode();
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// Returns if this IC is for contextual (no explicit receiver)
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// access to properties.
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bool IsContextual(Handle<Object> receiver) {
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if (receiver->IsGlobalObject()) {
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return SlowIsContextual();
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} else {
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ASSERT(!SlowIsContextual());
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return false;
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}
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}
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bool SlowIsContextual() {
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return ComputeMode() == RelocInfo::CODE_TARGET_CONTEXT;
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}
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// Determines which map must be used for keeping the code stub.
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// These methods should not be called with undefined or null.
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static inline InlineCacheHolderFlag GetCodeCacheForObject(Object* object,
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JSObject* holder);
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static inline InlineCacheHolderFlag GetCodeCacheForObject(JSObject* object,
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JSObject* holder);
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static inline JSObject* GetCodeCacheHolder(Object* object,
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InlineCacheHolderFlag holder);
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protected:
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Address fp() const { return fp_; }
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Address pc() const { return *pc_address_; }
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Isolate* isolate() const { return isolate_; }
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#ifdef ENABLE_DEBUGGER_SUPPORT
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// Computes the address in the original code when the code running is
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// containing break points (calls to DebugBreakXXX builtins).
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Address OriginalCodeAddress() const;
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#endif
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// Set the call-site target.
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void set_target(Code* code) { SetTargetAtAddress(address(), code); }
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#ifdef DEBUG
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char TransitionMarkFromState(IC::State state);
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void TraceIC(const char* type,
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Handle<Object> name,
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State old_state,
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Code* new_target);
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#endif
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Failure* TypeError(const char* type,
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Handle<Object> object,
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Handle<Object> key);
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Failure* ReferenceError(const char* type, Handle<String> name);
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// Access the target code for the given IC address.
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static inline Code* GetTargetAtAddress(Address address);
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static inline void SetTargetAtAddress(Address address, Code* target);
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static void PostPatching();
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private:
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// Frame pointer for the frame that uses (calls) the IC.
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Address fp_;
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// All access to the program counter of an IC structure is indirect
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// to make the code GC safe. This feature is crucial since
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// GetProperty and SetProperty are called and they in turn might
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// invoke the garbage collector.
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Address* pc_address_;
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Isolate* isolate_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(IC);
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};
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// An IC_Utility encapsulates IC::UtilityId. It exists mainly because you
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// cannot make forward declarations to an enum.
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class IC_Utility {
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public:
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explicit IC_Utility(IC::UtilityId id)
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: address_(IC::AddressFromUtilityId(id)), id_(id) {}
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Address address() const { return address_; }
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IC::UtilityId id() const { return id_; }
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private:
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Address address_;
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IC::UtilityId id_;
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};
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class CallICBase: public IC {
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public:
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class Contextual: public BitField<bool, 0, 1> {};
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class StringStubState: public BitField<StringStubFeedback, 1, 1> {};
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// Returns a JSFunction or a Failure.
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MUST_USE_RESULT MaybeObject* LoadFunction(State state,
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Code::ExtraICState extra_ic_state,
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Handle<Object> object,
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Handle<String> name);
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protected:
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CallICBase(Code::Kind kind, Isolate* isolate)
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: IC(EXTRA_CALL_FRAME, isolate), kind_(kind) {}
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bool TryUpdateExtraICState(LookupResult* lookup,
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Handle<Object> object,
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Code::ExtraICState* extra_ic_state);
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// Compute a monomorphic stub if possible, otherwise return a null handle.
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Handle<Code> ComputeMonomorphicStub(LookupResult* lookup,
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State state,
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Code::ExtraICState extra_state,
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Handle<Object> object,
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Handle<String> name);
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// Update the inline cache and the global stub cache based on the lookup
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// result.
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void UpdateCaches(LookupResult* lookup,
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State state,
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Code::ExtraICState extra_ic_state,
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Handle<Object> object,
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Handle<String> name);
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// Returns a JSFunction if the object can be called as a function, and
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// patches the stack to be ready for the call. Otherwise, it returns the
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// undefined value.
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Handle<Object> TryCallAsFunction(Handle<Object> object);
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void ReceiverToObjectIfRequired(Handle<Object> callee, Handle<Object> object);
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static void Clear(Address address, Code* target);
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// Platform-specific code generation functions used by both call and
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// keyed call.
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static void GenerateMiss(MacroAssembler* masm,
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int argc,
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IC::UtilityId id,
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Code::ExtraICState extra_state);
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static void GenerateNormal(MacroAssembler* masm, int argc);
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static void GenerateMonomorphicCacheProbe(MacroAssembler* masm,
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int argc,
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Code::Kind kind,
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Code::ExtraICState extra_state);
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Code::Kind kind_;
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friend class IC;
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};
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class CallIC: public CallICBase {
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public:
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explicit CallIC(Isolate* isolate) : CallICBase(Code::CALL_IC, isolate) {
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ASSERT(target()->is_call_stub());
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}
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// Code generator routines.
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static void GenerateInitialize(MacroAssembler* masm,
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int argc,
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Code::ExtraICState extra_state) {
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GenerateMiss(masm, argc, extra_state);
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}
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static void GenerateMiss(MacroAssembler* masm,
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int argc,
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Code::ExtraICState extra_state) {
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CallICBase::GenerateMiss(masm, argc, IC::kCallIC_Miss, extra_state);
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}
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static void GenerateMegamorphic(MacroAssembler* masm,
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int argc,
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Code::ExtraICState extra_ic_state);
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static void GenerateNormal(MacroAssembler* masm, int argc) {
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CallICBase::GenerateNormal(masm, argc);
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GenerateMiss(masm, argc, Code::kNoExtraICState);
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}
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};
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class KeyedCallIC: public CallICBase {
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public:
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explicit KeyedCallIC(Isolate* isolate)
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: CallICBase(Code::KEYED_CALL_IC, isolate) {
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ASSERT(target()->is_keyed_call_stub());
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}
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MUST_USE_RESULT MaybeObject* LoadFunction(State state,
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Handle<Object> object,
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Handle<Object> key);
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// Code generator routines.
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static void GenerateInitialize(MacroAssembler* masm, int argc) {
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GenerateMiss(masm, argc);
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}
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static void GenerateMiss(MacroAssembler* masm, int argc) {
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CallICBase::GenerateMiss(masm, argc, IC::kKeyedCallIC_Miss,
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Code::kNoExtraICState);
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}
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static void GenerateMegamorphic(MacroAssembler* masm, int argc);
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static void GenerateNormal(MacroAssembler* masm, int argc);
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static void GenerateNonStrictArguments(MacroAssembler* masm, int argc);
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};
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class LoadIC: public IC {
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public:
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explicit LoadIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {
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ASSERT(target()->is_load_stub());
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}
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MUST_USE_RESULT MaybeObject* Load(State state,
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Handle<Object> object,
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Handle<String> name);
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// Code generator routines.
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static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
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static void GeneratePreMonomorphic(MacroAssembler* masm) {
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GenerateMiss(masm);
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}
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static void GenerateMiss(MacroAssembler* masm);
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static void GenerateMegamorphic(MacroAssembler* masm);
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static void GenerateNormal(MacroAssembler* masm);
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// Specialized code generator routines.
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static void GenerateArrayLength(MacroAssembler* masm);
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static void GenerateStringLength(MacroAssembler* masm,
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bool support_wrappers);
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static void GenerateFunctionPrototype(MacroAssembler* masm);
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private:
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// Update the inline cache and the global stub cache based on the
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// lookup result.
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void UpdateCaches(LookupResult* lookup,
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State state,
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Handle<Object> object,
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Handle<String> name);
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// Stub accessors.
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Handle<Code> megamorphic_stub() {
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return isolate()->builtins()->LoadIC_Megamorphic();
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}
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static Code* initialize_stub() {
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return Isolate::Current()->builtins()->builtin(
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Builtins::kLoadIC_Initialize);
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}
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Handle<Code> pre_monomorphic_stub() {
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return isolate()->builtins()->LoadIC_PreMonomorphic();
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}
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static void Clear(Address address, Code* target);
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friend class IC;
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};
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class KeyedIC: public IC {
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public:
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enum StubKind {
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LOAD,
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STORE_NO_TRANSITION,
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STORE_TRANSITION_SMI_TO_OBJECT,
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STORE_TRANSITION_SMI_TO_DOUBLE,
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STORE_TRANSITION_DOUBLE_TO_OBJECT
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};
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explicit KeyedIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {}
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virtual ~KeyedIC() {}
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|
|
|
virtual Handle<Code> GetElementStubWithoutMapCheck(
|
|
|
|
bool is_js_array,
|
|
|
|
ElementsKind elements_kind) = 0;
|
|
|
|
|
|
|
|
protected:
|
|
|
|
virtual Handle<Code> string_stub() {
|
|
|
|
return Handle<Code>::null();
|
|
|
|
}
|
|
|
|
|
|
|
|
virtual Code::Kind kind() const = 0;
|
|
|
|
|
|
|
|
Handle<Code> ComputeStub(Handle<JSObject> receiver,
|
|
|
|
StubKind stub_kind,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<Code> default_stub);
|
|
|
|
|
|
|
|
virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
|
|
|
|
StrictModeFlag strict_mode) = 0;
|
|
|
|
|
|
|
|
Handle<Code> ComputeMonomorphicStubWithoutMapCheck(
|
|
|
|
Handle<Map> receiver_map,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
|
|
|
|
private:
|
|
|
|
void GetReceiverMapsForStub(Handle<Code> stub, MapHandleList* result);
|
|
|
|
|
|
|
|
Handle<Code> ComputeMonomorphicStub(Handle<JSObject> receiver,
|
|
|
|
StubKind stub_kind,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<Code> default_stub);
|
|
|
|
|
|
|
|
Handle<Map> ComputeTransitionedMap(Handle<JSObject> receiver,
|
|
|
|
StubKind stub_kind);
|
|
|
|
|
|
|
|
static bool IsTransitionStubKind(StubKind stub_kind) {
|
|
|
|
return stub_kind > STORE_NO_TRANSITION;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class KeyedLoadIC: public KeyedIC {
|
|
|
|
public:
|
|
|
|
explicit KeyedLoadIC(Isolate* isolate) : KeyedIC(isolate) {
|
|
|
|
ASSERT(target()->is_keyed_load_stub());
|
|
|
|
}
|
|
|
|
|
|
|
|
MUST_USE_RESULT MaybeObject* Load(State state,
|
|
|
|
Handle<Object> object,
|
|
|
|
Handle<Object> key,
|
|
|
|
bool force_generic_stub);
|
|
|
|
|
|
|
|
// Code generator routines.
|
|
|
|
static void GenerateMiss(MacroAssembler* masm, bool force_generic);
|
|
|
|
static void GenerateRuntimeGetProperty(MacroAssembler* masm);
|
|
|
|
static void GenerateInitialize(MacroAssembler* masm) {
|
|
|
|
GenerateMiss(masm, false);
|
|
|
|
}
|
|
|
|
static void GeneratePreMonomorphic(MacroAssembler* masm) {
|
|
|
|
GenerateMiss(masm, false);
|
|
|
|
}
|
|
|
|
static void GenerateGeneric(MacroAssembler* masm);
|
|
|
|
static void GenerateString(MacroAssembler* masm);
|
|
|
|
static void GenerateIndexedInterceptor(MacroAssembler* masm);
|
|
|
|
static void GenerateNonStrictArguments(MacroAssembler* masm);
|
|
|
|
|
|
|
|
// Bit mask to be tested against bit field for the cases when
|
|
|
|
// generic stub should go into slow case.
|
|
|
|
// Access check is necessary explicitly since generic stub does not perform
|
|
|
|
// map checks.
|
|
|
|
static const int kSlowCaseBitFieldMask =
|
|
|
|
(1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
|
|
|
|
|
|
|
|
virtual Handle<Code> GetElementStubWithoutMapCheck(
|
|
|
|
bool is_js_array,
|
|
|
|
ElementsKind elements_kind);
|
|
|
|
|
|
|
|
virtual bool IsGeneric() const {
|
|
|
|
return target() == *generic_stub();
|
|
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
|
|
virtual Code::Kind kind() const { return Code::KEYED_LOAD_IC; }
|
|
|
|
|
|
|
|
virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
|
|
|
|
virtual Handle<Code> string_stub() {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_String();
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
// Update the inline cache.
|
|
|
|
void UpdateCaches(LookupResult* lookup,
|
|
|
|
State state,
|
|
|
|
Handle<Object> object,
|
|
|
|
Handle<String> name);
|
|
|
|
|
|
|
|
// Stub accessors.
|
|
|
|
static Code* initialize_stub() {
|
|
|
|
return Isolate::Current()->builtins()->builtin(
|
|
|
|
Builtins::kKeyedLoadIC_Initialize);
|
|
|
|
}
|
|
|
|
Handle<Code> megamorphic_stub() {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_Generic();
|
|
|
|
}
|
|
|
|
Handle<Code> generic_stub() const {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_Generic();
|
|
|
|
}
|
|
|
|
Handle<Code> pre_monomorphic_stub() {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_PreMonomorphic();
|
|
|
|
}
|
|
|
|
Handle<Code> indexed_interceptor_stub() {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_IndexedInterceptor();
|
|
|
|
}
|
|
|
|
Handle<Code> non_strict_arguments_stub() {
|
|
|
|
return isolate()->builtins()->KeyedLoadIC_NonStrictArguments();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void Clear(Address address, Code* target);
|
|
|
|
|
|
|
|
friend class IC;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class StoreIC: public IC {
|
|
|
|
public:
|
|
|
|
explicit StoreIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {
|
|
|
|
ASSERT(target()->is_store_stub());
|
|
|
|
}
|
|
|
|
|
|
|
|
MUST_USE_RESULT MaybeObject* Store(State state,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<Object> object,
|
|
|
|
Handle<String> name,
|
|
|
|
Handle<Object> value);
|
|
|
|
|
|
|
|
// Code generators for stub routines. Only called once at startup.
|
|
|
|
static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
|
|
|
|
static void GenerateMiss(MacroAssembler* masm);
|
|
|
|
static void GenerateMegamorphic(MacroAssembler* masm,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
static void GenerateArrayLength(MacroAssembler* masm);
|
|
|
|
static void GenerateNormal(MacroAssembler* masm);
|
|
|
|
static void GenerateGlobalProxy(MacroAssembler* masm,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
|
|
|
|
private:
|
|
|
|
// Update the inline cache and the global stub cache based on the
|
|
|
|
// lookup result.
|
|
|
|
void UpdateCaches(LookupResult* lookup,
|
|
|
|
State state,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<JSObject> receiver,
|
|
|
|
Handle<String> name,
|
|
|
|
Handle<Object> value);
|
|
|
|
|
|
|
|
void set_target(Code* code) {
|
|
|
|
// Strict mode must be preserved across IC patching.
|
|
|
|
ASSERT((code->extra_ic_state() & kStrictMode) ==
|
|
|
|
(target()->extra_ic_state() & kStrictMode));
|
|
|
|
IC::set_target(code);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Stub accessors.
|
|
|
|
Code* megamorphic_stub() {
|
|
|
|
return isolate()->builtins()->builtin(
|
|
|
|
Builtins::kStoreIC_Megamorphic);
|
|
|
|
}
|
|
|
|
Code* megamorphic_stub_strict() {
|
|
|
|
return isolate()->builtins()->builtin(
|
|
|
|
Builtins::kStoreIC_Megamorphic_Strict);
|
|
|
|
}
|
|
|
|
static Code* initialize_stub() {
|
|
|
|
return Isolate::Current()->builtins()->builtin(
|
|
|
|
Builtins::kStoreIC_Initialize);
|
|
|
|
}
|
|
|
|
static Code* initialize_stub_strict() {
|
|
|
|
return Isolate::Current()->builtins()->builtin(
|
|
|
|
Builtins::kStoreIC_Initialize_Strict);
|
|
|
|
}
|
|
|
|
Handle<Code> global_proxy_stub() {
|
|
|
|
return isolate()->builtins()->StoreIC_GlobalProxy();
|
|
|
|
}
|
|
|
|
Handle<Code> global_proxy_stub_strict() {
|
|
|
|
return isolate()->builtins()->StoreIC_GlobalProxy_Strict();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void Clear(Address address, Code* target);
|
|
|
|
|
|
|
|
friend class IC;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class KeyedStoreIC: public KeyedIC {
|
|
|
|
public:
|
|
|
|
explicit KeyedStoreIC(Isolate* isolate) : KeyedIC(isolate) {
|
|
|
|
ASSERT(target()->is_keyed_store_stub());
|
|
|
|
}
|
|
|
|
|
|
|
|
MUST_USE_RESULT MaybeObject* Store(State state,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<Object> object,
|
|
|
|
Handle<Object> name,
|
|
|
|
Handle<Object> value,
|
|
|
|
bool force_generic);
|
|
|
|
|
|
|
|
// Code generators for stub routines. Only called once at startup.
|
|
|
|
static void GenerateInitialize(MacroAssembler* masm) {
|
|
|
|
GenerateMiss(masm, false);
|
|
|
|
}
|
|
|
|
static void GenerateMiss(MacroAssembler* masm, bool force_generic);
|
|
|
|
static void GenerateSlow(MacroAssembler* masm);
|
|
|
|
static void GenerateRuntimeSetProperty(MacroAssembler* masm,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
static void GenerateGeneric(MacroAssembler* masm, StrictModeFlag strict_mode);
|
|
|
|
static void GenerateNonStrictArguments(MacroAssembler* masm);
|
|
|
|
static void GenerateTransitionElementsSmiToDouble(MacroAssembler* masm);
|
|
|
|
static void GenerateTransitionElementsDoubleToObject(MacroAssembler* masm);
|
|
|
|
|
|
|
|
virtual Handle<Code> GetElementStubWithoutMapCheck(
|
|
|
|
bool is_js_array,
|
|
|
|
ElementsKind elements_kind);
|
|
|
|
|
|
|
|
virtual bool IsGeneric() const {
|
|
|
|
return target() == *generic_stub() ||
|
|
|
|
target() == *generic_stub_strict();
|
|
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
|
|
virtual Code::Kind kind() const { return Code::KEYED_STORE_IC; }
|
|
|
|
|
|
|
|
virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
|
|
|
|
StrictModeFlag strict_mode);
|
|
|
|
|
|
|
|
private:
|
|
|
|
// Update the inline cache.
|
|
|
|
void UpdateCaches(LookupResult* lookup,
|
|
|
|
State state,
|
|
|
|
StrictModeFlag strict_mode,
|
|
|
|
Handle<JSObject> receiver,
|
|
|
|
Handle<String> name,
|
|
|
|
Handle<Object> value);
|
|
|
|
|
|
|
|
void set_target(Code* code) {
|
|
|
|
// Strict mode must be preserved across IC patching.
|
|
|
|
ASSERT((code->extra_ic_state() & kStrictMode) ==
|
|
|
|
(target()->extra_ic_state() & kStrictMode));
|
|
|
|
IC::set_target(code);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Stub accessors.
|
|
|
|
static Code* initialize_stub() {
|
|
|
|
return Isolate::Current()->builtins()->builtin(
|
|
|
|
Builtins::kKeyedStoreIC_Initialize);
|
|
|
|
}
|
|
|
|
static Code* initialize_stub_strict() {
|
|
|
|
return Isolate::Current()->builtins()->builtin(
|
|
|
|
Builtins::kKeyedStoreIC_Initialize_Strict);
|
|
|
|
}
|
|
|
|
Handle<Code> megamorphic_stub() {
|
|
|
|
return isolate()->builtins()->KeyedStoreIC_Generic();
|
|
|
|
}
|
|
|
|
Handle<Code> megamorphic_stub_strict() {
|
|
|
|
return isolate()->builtins()->KeyedStoreIC_Generic_Strict();
|
|
|
|
}
|
|
|
|
Handle<Code> generic_stub() const {
|
|
|
|
return isolate()->builtins()->KeyedStoreIC_Generic();
|
|
|
|
}
|
|
|
|
Handle<Code> generic_stub_strict() const {
|
|
|
|
return isolate()->builtins()->KeyedStoreIC_Generic_Strict();
|
|
|
|
}
|
|
|
|
Handle<Code> non_strict_arguments_stub() {
|
|
|
|
return isolate()->builtins()->KeyedStoreIC_NonStrictArguments();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void Clear(Address address, Code* target);
|
|
|
|
|
|
|
|
friend class IC;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class UnaryOpIC: public IC {
|
|
|
|
public:
|
|
|
|
// sorted: increasingly more unspecific (ignoring UNINITIALIZED)
|
|
|
|
// TODO(svenpanne) Using enums+switch is an antipattern, use a class instead.
|
|
|
|
enum TypeInfo {
|
|
|
|
UNINITIALIZED,
|
|
|
|
SMI,
|
|
|
|
HEAP_NUMBER,
|
|
|
|
GENERIC
|
|
|
|
};
|
|
|
|
|
|
|
|
explicit UnaryOpIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) { }
|
|
|
|
|
|
|
|
void patch(Code* code);
|
|
|
|
|
|
|
|
static const char* GetName(TypeInfo type_info);
|
|
|
|
|
|
|
|
static State ToState(TypeInfo type_info);
|
|
|
|
|
|
|
|
static TypeInfo GetTypeInfo(Handle<Object> operand);
|
|
|
|
|
|
|
|
static TypeInfo ComputeNewType(TypeInfo type, TypeInfo previous);
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
// Type Recording BinaryOpIC, that records the types of the inputs and outputs.
|
|
|
|
class BinaryOpIC: public IC {
|
|
|
|
public:
|
|
|
|
enum TypeInfo {
|
|
|
|
UNINITIALIZED,
|
|
|
|
SMI,
|
|
|
|
INT32,
|
|
|
|
HEAP_NUMBER,
|
|
|
|
ODDBALL,
|
|
|
|
BOTH_STRING, // Only used for addition operation.
|
|
|
|
STRING, // Only used for addition operation. At least one string operand.
|
|
|
|
GENERIC
|
|
|
|
};
|
|
|
|
|
|
|
|
explicit BinaryOpIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) { }
|
|
|
|
|
|
|
|
void patch(Code* code);
|
|
|
|
|
|
|
|
static const char* GetName(TypeInfo type_info);
|
|
|
|
|
|
|
|
static State ToState(TypeInfo type_info);
|
|
|
|
|
|
|
|
static TypeInfo GetTypeInfo(Handle<Object> left, Handle<Object> right);
|
|
|
|
|
|
|
|
static TypeInfo JoinTypes(TypeInfo x, TypeInfo y);
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class CompareIC: public IC {
|
|
|
|
public:
|
|
|
|
enum State {
|
|
|
|
UNINITIALIZED,
|
|
|
|
SMIS,
|
|
|
|
HEAP_NUMBERS,
|
|
|
|
SYMBOLS,
|
|
|
|
STRINGS,
|
|
|
|
OBJECTS,
|
|
|
|
KNOWN_OBJECTS,
|
|
|
|
GENERIC
|
|
|
|
};
|
|
|
|
|
|
|
|
CompareIC(Isolate* isolate, Token::Value op)
|
|
|
|
: IC(EXTRA_CALL_FRAME, isolate), op_(op) { }
|
|
|
|
|
|
|
|
// Update the inline cache for the given operands.
|
|
|
|
void UpdateCaches(Handle<Object> x, Handle<Object> y);
|
|
|
|
|
|
|
|
// Factory method for getting an uninitialized compare stub.
|
|
|
|
static Handle<Code> GetUninitialized(Token::Value op);
|
|
|
|
|
|
|
|
// Helper function for computing the condition for a compare operation.
|
|
|
|
static Condition ComputeCondition(Token::Value op);
|
|
|
|
|
|
|
|
// Helper function for determining the state of a compare IC.
|
|
|
|
static State ComputeState(Code* target);
|
|
|
|
|
|
|
|
static const char* GetStateName(State state);
|
|
|
|
|
|
|
|
private:
|
|
|
|
State TargetState(State state, bool has_inlined_smi_code,
|
|
|
|
Handle<Object> x, Handle<Object> y);
|
|
|
|
|
|
|
|
bool strict() const { return op_ == Token::EQ_STRICT; }
|
|
|
|
Condition GetCondition() const { return ComputeCondition(op_); }
|
|
|
|
State GetState() { return ComputeState(target()); }
|
|
|
|
|
|
|
|
Token::Value op_;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class ToBooleanIC: public IC {
|
|
|
|
public:
|
|
|
|
explicit ToBooleanIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) { }
|
|
|
|
|
|
|
|
void patch(Code* code);
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
// Helper for BinaryOpIC and CompareIC.
|
|
|
|
void PatchInlinedSmiCode(Address address);
|
|
|
|
|
|
|
|
} } // namespace v8::internal
|
|
|
|
|
|
|
|
#endif // V8_IC_H_
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