209b17ac31
BUG= R=ishell@chromium.org Review URL: https://codereview.chromium.org/163363003 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19384 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2481 lines
71 KiB
C++
2481 lines
71 KiB
C++
// Copyright 2012 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_CODE_STUBS_H_
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#define V8_CODE_STUBS_H_
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#include "allocation.h"
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#include "assembler.h"
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#include "codegen.h"
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#include "globals.h"
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#include "macro-assembler.h"
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namespace v8 {
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namespace internal {
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// List of code stubs used on all platforms.
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#define CODE_STUB_LIST_ALL_PLATFORMS(V) \
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V(CallFunction) \
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V(CallConstruct) \
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V(BinaryOpIC) \
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V(BinaryOpICWithAllocationSite) \
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V(BinaryOpWithAllocationSite) \
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V(StringAdd) \
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V(SubString) \
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V(StringCompare) \
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V(Compare) \
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V(CompareIC) \
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V(CompareNilIC) \
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V(MathPow) \
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V(StringLength) \
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V(FunctionPrototype) \
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V(StoreArrayLength) \
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V(RecordWrite) \
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V(StoreBufferOverflow) \
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V(RegExpExec) \
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V(Instanceof) \
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V(ConvertToDouble) \
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V(WriteInt32ToHeapNumber) \
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V(StackCheck) \
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V(Interrupt) \
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V(FastNewClosure) \
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V(FastNewContext) \
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V(FastCloneShallowArray) \
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V(FastCloneShallowObject) \
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V(CreateAllocationSite) \
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V(ToBoolean) \
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V(ToNumber) \
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V(ArgumentsAccess) \
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V(RegExpConstructResult) \
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V(NumberToString) \
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V(DoubleToI) \
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V(CEntry) \
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V(JSEntry) \
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V(KeyedLoadElement) \
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V(ArrayPush) \
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V(ArrayNoArgumentConstructor) \
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V(ArraySingleArgumentConstructor) \
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V(ArrayNArgumentsConstructor) \
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V(InternalArrayNoArgumentConstructor) \
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V(InternalArraySingleArgumentConstructor) \
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V(InternalArrayNArgumentsConstructor) \
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V(KeyedStoreElement) \
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V(DebuggerStatement) \
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V(NameDictionaryLookup) \
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V(ElementsTransitionAndStore) \
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V(TransitionElementsKind) \
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V(StoreArrayLiteralElement) \
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V(StubFailureTrampoline) \
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V(ArrayConstructor) \
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V(InternalArrayConstructor) \
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V(ProfileEntryHook) \
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V(StoreGlobal) \
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V(CallApiFunction) \
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V(CallApiGetter) \
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/* IC Handler stubs */ \
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V(LoadField) \
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V(KeyedLoadField)
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// List of code stubs only used on ARM platforms.
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#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_A64)
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#define CODE_STUB_LIST_ARM(V) \
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V(GetProperty) \
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V(SetProperty) \
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V(InvokeBuiltin) \
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V(DirectCEntry)
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#else
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#define CODE_STUB_LIST_ARM(V)
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#endif
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// List of code stubs only used on MIPS platforms.
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#if V8_TARGET_ARCH_MIPS
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#define CODE_STUB_LIST_MIPS(V) \
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V(RegExpCEntry) \
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V(DirectCEntry) \
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V(StoreRegistersState) \
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V(RestoreRegistersState)
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#else
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#define CODE_STUB_LIST_MIPS(V)
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#endif
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// Combined list of code stubs.
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#define CODE_STUB_LIST(V) \
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CODE_STUB_LIST_ALL_PLATFORMS(V) \
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CODE_STUB_LIST_ARM(V) \
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CODE_STUB_LIST_MIPS(V)
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// Stub is base classes of all stubs.
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class CodeStub BASE_EMBEDDED {
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public:
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enum Major {
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UninitializedMajorKey = 0,
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#define DEF_ENUM(name) name,
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CODE_STUB_LIST(DEF_ENUM)
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#undef DEF_ENUM
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NoCache, // marker for stubs that do custom caching
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NUMBER_OF_IDS
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};
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// Retrieve the code for the stub. Generate the code if needed.
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Handle<Code> GetCode(Isolate* isolate);
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// Retrieve the code for the stub, make and return a copy of the code.
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Handle<Code> GetCodeCopyFromTemplate(Isolate* isolate);
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static Major MajorKeyFromKey(uint32_t key) {
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return static_cast<Major>(MajorKeyBits::decode(key));
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}
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static int MinorKeyFromKey(uint32_t key) {
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return MinorKeyBits::decode(key);
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}
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// Gets the major key from a code object that is a code stub or binary op IC.
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static Major GetMajorKey(Code* code_stub) {
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return static_cast<Major>(code_stub->major_key());
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}
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static const char* MajorName(Major major_key, bool allow_unknown_keys);
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virtual ~CodeStub() {}
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static void GenerateStubsAheadOfTime(Isolate* isolate);
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static void GenerateFPStubs(Isolate* isolate);
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// Some stubs put untagged junk on the stack that cannot be scanned by the
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// GC. This means that we must be statically sure that no GC can occur while
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// they are running. If that is the case they should override this to return
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// true, which will cause an assertion if we try to call something that can
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// GC or if we try to put a stack frame on top of the junk, which would not
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// result in a traversable stack.
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virtual bool SometimesSetsUpAFrame() { return true; }
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// Lookup the code in the (possibly custom) cache.
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bool FindCodeInCache(Code** code_out, Isolate* isolate);
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// Returns information for computing the number key.
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virtual Major MajorKey() = 0;
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virtual int MinorKey() = 0;
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virtual InlineCacheState GetICState() {
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return UNINITIALIZED;
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}
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virtual ExtraICState GetExtraICState() {
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return kNoExtraICState;
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}
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virtual Code::StubType GetStubType() {
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return Code::NORMAL;
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}
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virtual void PrintName(StringStream* stream);
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// Returns a name for logging/debugging purposes.
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SmartArrayPointer<const char> GetName();
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protected:
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static bool CanUseFPRegisters();
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// Generates the assembler code for the stub.
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virtual Handle<Code> GenerateCode(Isolate* isolate) = 0;
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virtual void VerifyPlatformFeatures(Isolate* isolate);
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// Returns whether the code generated for this stub needs to be allocated as
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// a fixed (non-moveable) code object.
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virtual bool NeedsImmovableCode() { return false; }
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virtual void PrintBaseName(StringStream* stream);
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virtual void PrintState(StringStream* stream) { }
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private:
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// Perform bookkeeping required after code generation when stub code is
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// initially generated.
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void RecordCodeGeneration(Code* code, Isolate* isolate);
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// Finish the code object after it has been generated.
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virtual void FinishCode(Handle<Code> code) { }
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// Activate newly generated stub. Is called after
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// registering stub in the stub cache.
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virtual void Activate(Code* code) { }
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// BinaryOpStub needs to override this.
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virtual Code::Kind GetCodeKind() const;
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// Add the code to a specialized cache, specific to an individual
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// stub type. Please note, this method must add the code object to a
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// roots object, otherwise we will remove the code during GC.
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virtual void AddToSpecialCache(Handle<Code> new_object) { }
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// Find code in a specialized cache, work is delegated to the specific stub.
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virtual bool FindCodeInSpecialCache(Code** code_out, Isolate* isolate) {
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return false;
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}
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// If a stub uses a special cache override this.
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virtual bool UseSpecialCache() { return false; }
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// Computes the key based on major and minor.
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uint32_t GetKey() {
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ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
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return MinorKeyBits::encode(MinorKey()) |
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MajorKeyBits::encode(MajorKey());
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}
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STATIC_ASSERT(NUMBER_OF_IDS < (1 << kStubMajorKeyBits));
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class MajorKeyBits: public BitField<uint32_t, 0, kStubMajorKeyBits> {};
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class MinorKeyBits: public BitField<uint32_t,
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kStubMajorKeyBits, kStubMinorKeyBits> {}; // NOLINT
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friend class BreakPointIterator;
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};
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class PlatformCodeStub : public CodeStub {
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public:
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// Retrieve the code for the stub. Generate the code if needed.
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virtual Handle<Code> GenerateCode(Isolate* isolate);
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virtual Code::Kind GetCodeKind() const { return Code::STUB; }
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protected:
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// Generates the assembler code for the stub.
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virtual void Generate(MacroAssembler* masm) = 0;
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};
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enum StubFunctionMode { NOT_JS_FUNCTION_STUB_MODE, JS_FUNCTION_STUB_MODE };
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enum HandlerArgumentsMode { DONT_PASS_ARGUMENTS, PASS_ARGUMENTS };
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struct CodeStubInterfaceDescriptor {
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CodeStubInterfaceDescriptor();
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int register_param_count_;
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Register stack_parameter_count_;
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// if hint_stack_parameter_count_ > 0, the code stub can optimize the
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// return sequence. Default value is -1, which means it is ignored.
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int hint_stack_parameter_count_;
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StubFunctionMode function_mode_;
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Register* register_params_;
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Address deoptimization_handler_;
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HandlerArgumentsMode handler_arguments_mode_;
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bool initialized() const { return register_param_count_ >= 0; }
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int environment_length() const {
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return register_param_count_;
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}
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void SetMissHandler(ExternalReference handler) {
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miss_handler_ = handler;
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has_miss_handler_ = true;
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// Our miss handler infrastructure doesn't currently support
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// variable stack parameter counts.
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ASSERT(!stack_parameter_count_.is_valid());
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}
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ExternalReference miss_handler() {
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ASSERT(has_miss_handler_);
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return miss_handler_;
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}
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bool has_miss_handler() {
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return has_miss_handler_;
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}
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Register GetParameterRegister(int index) const {
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return register_params_[index];
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}
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bool IsParameterCountRegister(int index) {
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return GetParameterRegister(index).is(stack_parameter_count_);
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}
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int GetHandlerParameterCount() {
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int params = environment_length();
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if (handler_arguments_mode_ == PASS_ARGUMENTS) {
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params += 1;
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}
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return params;
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}
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private:
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ExternalReference miss_handler_;
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bool has_miss_handler_;
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};
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struct PlatformCallInterfaceDescriptor;
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struct CallInterfaceDescriptor {
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CallInterfaceDescriptor()
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: register_param_count_(-1),
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register_params_(NULL),
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param_representations_(NULL),
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platform_specific_descriptor_(NULL) { }
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bool initialized() const { return register_param_count_ >= 0; }
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int environment_length() const {
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return register_param_count_;
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}
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Representation GetParameterRepresentation(int index) const {
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return param_representations_[index];
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}
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Register GetParameterRegister(int index) const {
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return register_params_[index];
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}
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PlatformCallInterfaceDescriptor* platform_specific_descriptor() const {
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return platform_specific_descriptor_;
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}
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int register_param_count_;
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Register* register_params_;
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Representation* param_representations_;
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PlatformCallInterfaceDescriptor* platform_specific_descriptor_;
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};
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class HydrogenCodeStub : public CodeStub {
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public:
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enum InitializationState {
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UNINITIALIZED,
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INITIALIZED
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};
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explicit HydrogenCodeStub(InitializationState state = INITIALIZED) {
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is_uninitialized_ = (state == UNINITIALIZED);
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}
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virtual Code::Kind GetCodeKind() const { return Code::STUB; }
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CodeStubInterfaceDescriptor* GetInterfaceDescriptor(Isolate* isolate) {
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return isolate->code_stub_interface_descriptor(MajorKey());
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}
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bool IsUninitialized() { return is_uninitialized_; }
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template<class SubClass>
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static Handle<Code> GetUninitialized(Isolate* isolate) {
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SubClass::GenerateAheadOfTime(isolate);
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return SubClass().GetCode(isolate);
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}
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virtual void InitializeInterfaceDescriptor(
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Isolate* isolate,
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CodeStubInterfaceDescriptor* descriptor) = 0;
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// Retrieve the code for the stub. Generate the code if needed.
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virtual Handle<Code> GenerateCode(Isolate* isolate) = 0;
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virtual int NotMissMinorKey() = 0;
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Handle<Code> GenerateLightweightMissCode(Isolate* isolate);
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template<class StateType>
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void TraceTransition(StateType from, StateType to);
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private:
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class MinorKeyBits: public BitField<int, 0, kStubMinorKeyBits - 1> {};
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class IsMissBits: public BitField<bool, kStubMinorKeyBits - 1, 1> {};
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void GenerateLightweightMiss(MacroAssembler* masm);
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virtual int MinorKey() {
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return IsMissBits::encode(is_uninitialized_) |
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MinorKeyBits::encode(NotMissMinorKey());
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}
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bool is_uninitialized_;
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};
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// Helper interface to prepare to/restore after making runtime calls.
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class RuntimeCallHelper {
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public:
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virtual ~RuntimeCallHelper() {}
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virtual void BeforeCall(MacroAssembler* masm) const = 0;
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virtual void AfterCall(MacroAssembler* masm) const = 0;
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protected:
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RuntimeCallHelper() {}
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private:
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DISALLOW_COPY_AND_ASSIGN(RuntimeCallHelper);
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};
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} } // namespace v8::internal
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#if V8_TARGET_ARCH_IA32
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#include "ia32/code-stubs-ia32.h"
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#elif V8_TARGET_ARCH_X64
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#include "x64/code-stubs-x64.h"
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#elif V8_TARGET_ARCH_A64
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#include "a64/code-stubs-a64.h"
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#elif V8_TARGET_ARCH_ARM
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#include "arm/code-stubs-arm.h"
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#elif V8_TARGET_ARCH_MIPS
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#include "mips/code-stubs-mips.h"
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#else
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#error Unsupported target architecture.
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#endif
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namespace v8 {
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namespace internal {
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// RuntimeCallHelper implementation used in stubs: enters/leaves a
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// newly created internal frame before/after the runtime call.
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class StubRuntimeCallHelper : public RuntimeCallHelper {
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public:
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StubRuntimeCallHelper() {}
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virtual void BeforeCall(MacroAssembler* masm) const;
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virtual void AfterCall(MacroAssembler* masm) const;
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};
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// Trivial RuntimeCallHelper implementation.
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class NopRuntimeCallHelper : public RuntimeCallHelper {
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public:
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NopRuntimeCallHelper() {}
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virtual void BeforeCall(MacroAssembler* masm) const {}
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virtual void AfterCall(MacroAssembler* masm) const {}
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};
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class ToNumberStub: public HydrogenCodeStub {
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public:
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ToNumberStub() { }
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virtual Handle<Code> GenerateCode(Isolate* isolate);
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virtual void InitializeInterfaceDescriptor(
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Isolate* isolate,
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CodeStubInterfaceDescriptor* descriptor);
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private:
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Major MajorKey() { return ToNumber; }
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int NotMissMinorKey() { return 0; }
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};
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class NumberToStringStub V8_FINAL : public HydrogenCodeStub {
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public:
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NumberToStringStub() {}
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virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
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virtual void InitializeInterfaceDescriptor(
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Isolate* isolate,
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CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
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static void InstallDescriptors(Isolate* isolate);
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// Parameters accessed via CodeStubGraphBuilder::GetParameter()
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static const int kNumber = 0;
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private:
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virtual Major MajorKey() V8_OVERRIDE { return NumberToString; }
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virtual int NotMissMinorKey() V8_OVERRIDE { return 0; }
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};
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class FastNewClosureStub : public HydrogenCodeStub {
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public:
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explicit FastNewClosureStub(LanguageMode language_mode, bool is_generator)
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: language_mode_(language_mode),
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is_generator_(is_generator) { }
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virtual Handle<Code> GenerateCode(Isolate* isolate);
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virtual void InitializeInterfaceDescriptor(
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Isolate* isolate,
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CodeStubInterfaceDescriptor* descriptor);
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static void InstallDescriptors(Isolate* isolate);
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LanguageMode language_mode() const { return language_mode_; }
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bool is_generator() const { return is_generator_; }
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private:
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class StrictModeBits: public BitField<bool, 0, 1> {};
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class IsGeneratorBits: public BitField<bool, 1, 1> {};
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Major MajorKey() { return FastNewClosure; }
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int NotMissMinorKey() {
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return StrictModeBits::encode(language_mode_ != CLASSIC_MODE) |
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IsGeneratorBits::encode(is_generator_);
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}
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|
|
LanguageMode language_mode_;
|
|
bool is_generator_;
|
|
};
|
|
|
|
|
|
class FastNewContextStub V8_FINAL : public HydrogenCodeStub {
|
|
public:
|
|
static const int kMaximumSlots = 64;
|
|
|
|
explicit FastNewContextStub(int slots) : slots_(slots) {
|
|
ASSERT(slots_ > 0 && slots_ <= kMaximumSlots);
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
int slots() const { return slots_; }
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE { return FastNewContext; }
|
|
virtual int NotMissMinorKey() V8_OVERRIDE { return slots_; }
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kFunction = 0;
|
|
|
|
private:
|
|
int slots_;
|
|
};
|
|
|
|
|
|
class FastCloneShallowArrayStub : public HydrogenCodeStub {
|
|
public:
|
|
// Maximum length of copied elements array.
|
|
static const int kMaximumClonedLength = 8;
|
|
enum Mode {
|
|
CLONE_ELEMENTS,
|
|
CLONE_DOUBLE_ELEMENTS,
|
|
COPY_ON_WRITE_ELEMENTS,
|
|
CLONE_ANY_ELEMENTS,
|
|
LAST_CLONE_MODE = CLONE_ANY_ELEMENTS
|
|
};
|
|
|
|
static const int kFastCloneModeCount = LAST_CLONE_MODE + 1;
|
|
|
|
FastCloneShallowArrayStub(Mode mode,
|
|
AllocationSiteMode allocation_site_mode,
|
|
int length)
|
|
: mode_(mode),
|
|
allocation_site_mode_(allocation_site_mode),
|
|
length_((mode == COPY_ON_WRITE_ELEMENTS) ? 0 : length) {
|
|
ASSERT_GE(length_, 0);
|
|
ASSERT_LE(length_, kMaximumClonedLength);
|
|
}
|
|
|
|
Mode mode() const { return mode_; }
|
|
int length() const { return length_; }
|
|
AllocationSiteMode allocation_site_mode() const {
|
|
return allocation_site_mode_;
|
|
}
|
|
|
|
ElementsKind ComputeElementsKind() const {
|
|
switch (mode()) {
|
|
case CLONE_ELEMENTS:
|
|
case COPY_ON_WRITE_ELEMENTS:
|
|
return FAST_ELEMENTS;
|
|
case CLONE_DOUBLE_ELEMENTS:
|
|
return FAST_DOUBLE_ELEMENTS;
|
|
case CLONE_ANY_ELEMENTS:
|
|
/*fall-through*/;
|
|
}
|
|
UNREACHABLE();
|
|
return LAST_ELEMENTS_KIND;
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Mode mode_;
|
|
AllocationSiteMode allocation_site_mode_;
|
|
int length_;
|
|
|
|
class AllocationSiteModeBits: public BitField<AllocationSiteMode, 0, 1> {};
|
|
class ModeBits: public BitField<Mode, 1, 4> {};
|
|
class LengthBits: public BitField<int, 5, 4> {};
|
|
// Ensure data fits within available bits.
|
|
STATIC_ASSERT(LAST_ALLOCATION_SITE_MODE == 1);
|
|
STATIC_ASSERT(kFastCloneModeCount < 16);
|
|
STATIC_ASSERT(kMaximumClonedLength < 16);
|
|
Major MajorKey() { return FastCloneShallowArray; }
|
|
int NotMissMinorKey() {
|
|
return AllocationSiteModeBits::encode(allocation_site_mode_)
|
|
| ModeBits::encode(mode_)
|
|
| LengthBits::encode(length_);
|
|
}
|
|
};
|
|
|
|
|
|
class FastCloneShallowObjectStub : public HydrogenCodeStub {
|
|
public:
|
|
// Maximum number of properties in copied object.
|
|
static const int kMaximumClonedProperties = 6;
|
|
|
|
explicit FastCloneShallowObjectStub(int length)
|
|
: length_(length) {
|
|
ASSERT_GE(length_, 0);
|
|
ASSERT_LE(length_, kMaximumClonedProperties);
|
|
}
|
|
|
|
int length() const { return length_; }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
int length_;
|
|
|
|
Major MajorKey() { return FastCloneShallowObject; }
|
|
int NotMissMinorKey() { return length_; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(FastCloneShallowObjectStub);
|
|
};
|
|
|
|
|
|
class CreateAllocationSiteStub : public HydrogenCodeStub {
|
|
public:
|
|
explicit CreateAllocationSiteStub() { }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
static void GenerateAheadOfTime(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return CreateAllocationSite; }
|
|
int NotMissMinorKey() { return 0; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(CreateAllocationSiteStub);
|
|
};
|
|
|
|
|
|
class InstanceofStub: public PlatformCodeStub {
|
|
public:
|
|
enum Flags {
|
|
kNoFlags = 0,
|
|
kArgsInRegisters = 1 << 0,
|
|
kCallSiteInlineCheck = 1 << 1,
|
|
kReturnTrueFalseObject = 1 << 2
|
|
};
|
|
|
|
explicit InstanceofStub(Flags flags) : flags_(flags) { }
|
|
|
|
static Register left();
|
|
static Register right();
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
Major MajorKey() { return Instanceof; }
|
|
int MinorKey() { return static_cast<int>(flags_); }
|
|
|
|
bool HasArgsInRegisters() const {
|
|
return (flags_ & kArgsInRegisters) != 0;
|
|
}
|
|
|
|
bool HasCallSiteInlineCheck() const {
|
|
return (flags_ & kCallSiteInlineCheck) != 0;
|
|
}
|
|
|
|
bool ReturnTrueFalseObject() const {
|
|
return (flags_ & kReturnTrueFalseObject) != 0;
|
|
}
|
|
|
|
virtual void PrintName(StringStream* stream);
|
|
|
|
Flags flags_;
|
|
};
|
|
|
|
|
|
enum AllocationSiteOverrideMode {
|
|
DONT_OVERRIDE,
|
|
DISABLE_ALLOCATION_SITES,
|
|
LAST_ALLOCATION_SITE_OVERRIDE_MODE = DISABLE_ALLOCATION_SITES
|
|
};
|
|
|
|
|
|
class ArrayConstructorStub: public PlatformCodeStub {
|
|
public:
|
|
enum ArgumentCountKey { ANY, NONE, ONE, MORE_THAN_ONE };
|
|
ArrayConstructorStub(Isolate* isolate, int argument_count);
|
|
explicit ArrayConstructorStub(Isolate* isolate);
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
void GenerateDispatchToArrayStub(MacroAssembler* masm,
|
|
AllocationSiteOverrideMode mode);
|
|
virtual void PrintName(StringStream* stream);
|
|
|
|
virtual CodeStub::Major MajorKey() { return ArrayConstructor; }
|
|
virtual int MinorKey() { return argument_count_; }
|
|
|
|
ArgumentCountKey argument_count_;
|
|
};
|
|
|
|
|
|
class InternalArrayConstructorStub: public PlatformCodeStub {
|
|
public:
|
|
explicit InternalArrayConstructorStub(Isolate* isolate);
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
virtual CodeStub::Major MajorKey() { return InternalArrayConstructor; }
|
|
virtual int MinorKey() { return 0; }
|
|
|
|
void GenerateCase(MacroAssembler* masm, ElementsKind kind);
|
|
};
|
|
|
|
|
|
class MathPowStub: public PlatformCodeStub {
|
|
public:
|
|
enum ExponentType { INTEGER, DOUBLE, TAGGED, ON_STACK };
|
|
|
|
explicit MathPowStub(ExponentType exponent_type)
|
|
: exponent_type_(exponent_type) { }
|
|
virtual void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
virtual CodeStub::Major MajorKey() { return MathPow; }
|
|
virtual int MinorKey() { return exponent_type_; }
|
|
|
|
ExponentType exponent_type_;
|
|
};
|
|
|
|
|
|
class ICStub: public PlatformCodeStub {
|
|
public:
|
|
explicit ICStub(Code::Kind kind) : kind_(kind) { }
|
|
virtual Code::Kind GetCodeKind() const { return kind_; }
|
|
virtual InlineCacheState GetICState() { return MONOMORPHIC; }
|
|
|
|
bool Describes(Code* code) {
|
|
return GetMajorKey(code) == MajorKey() && code->stub_info() == MinorKey();
|
|
}
|
|
|
|
protected:
|
|
class KindBits: public BitField<Code::Kind, 0, 4> {};
|
|
virtual void FinishCode(Handle<Code> code) {
|
|
code->set_stub_info(MinorKey());
|
|
}
|
|
Code::Kind kind() { return kind_; }
|
|
|
|
virtual int MinorKey() {
|
|
return KindBits::encode(kind_);
|
|
}
|
|
|
|
private:
|
|
Code::Kind kind_;
|
|
};
|
|
|
|
|
|
class FunctionPrototypeStub: public ICStub {
|
|
public:
|
|
explicit FunctionPrototypeStub(Code::Kind kind) : ICStub(kind) { }
|
|
virtual void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
virtual CodeStub::Major MajorKey() { return FunctionPrototype; }
|
|
};
|
|
|
|
|
|
class StringLengthStub: public ICStub {
|
|
public:
|
|
explicit StringLengthStub(Code::Kind kind) : ICStub(kind) { }
|
|
virtual void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
STATIC_ASSERT(KindBits::kSize == 4);
|
|
virtual CodeStub::Major MajorKey() { return StringLength; }
|
|
};
|
|
|
|
|
|
class StoreICStub: public ICStub {
|
|
public:
|
|
StoreICStub(Code::Kind kind, StrictModeFlag strict_mode)
|
|
: ICStub(kind), strict_mode_(strict_mode) { }
|
|
|
|
protected:
|
|
virtual ExtraICState GetExtraICState() {
|
|
return StoreIC::ComputeExtraICState(strict_mode_);
|
|
}
|
|
|
|
private:
|
|
STATIC_ASSERT(KindBits::kSize == 4);
|
|
class StrictModeBits: public BitField<bool, 4, 1> {};
|
|
virtual int MinorKey() {
|
|
return KindBits::encode(kind()) | StrictModeBits::encode(strict_mode_);
|
|
}
|
|
|
|
StrictModeFlag strict_mode_;
|
|
};
|
|
|
|
|
|
class StoreArrayLengthStub: public StoreICStub {
|
|
public:
|
|
explicit StoreArrayLengthStub(Code::Kind kind, StrictModeFlag strict_mode)
|
|
: StoreICStub(kind, strict_mode) { }
|
|
virtual void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
virtual CodeStub::Major MajorKey() { return StoreArrayLength; }
|
|
};
|
|
|
|
|
|
class HICStub: public HydrogenCodeStub {
|
|
public:
|
|
virtual Code::Kind GetCodeKind() const { return kind(); }
|
|
virtual InlineCacheState GetICState() { return MONOMORPHIC; }
|
|
|
|
protected:
|
|
class KindBits: public BitField<Code::Kind, 0, 4> {};
|
|
virtual Code::Kind kind() const = 0;
|
|
};
|
|
|
|
|
|
class HandlerStub: public HICStub {
|
|
public:
|
|
virtual Code::Kind GetCodeKind() const { return Code::HANDLER; }
|
|
virtual ExtraICState GetExtraICState() {
|
|
return Code::HandlerKindField::encode(kind());
|
|
}
|
|
|
|
protected:
|
|
HandlerStub() : HICStub() { }
|
|
virtual int NotMissMinorKey() { return bit_field_; }
|
|
int bit_field_;
|
|
};
|
|
|
|
|
|
class LoadFieldStub: public HandlerStub {
|
|
public:
|
|
LoadFieldStub(bool inobject, int index, Representation representation) {
|
|
Initialize(Code::LOAD_IC, inobject, index, representation);
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
Representation representation() {
|
|
if (unboxed_double()) return Representation::Double();
|
|
return Representation::Tagged();
|
|
}
|
|
|
|
virtual Code::Kind kind() const {
|
|
return KindBits::decode(bit_field_);
|
|
}
|
|
|
|
bool is_inobject() {
|
|
return InobjectBits::decode(bit_field_);
|
|
}
|
|
|
|
int offset() {
|
|
int index = IndexBits::decode(bit_field_);
|
|
int offset = index * kPointerSize;
|
|
if (is_inobject()) return offset;
|
|
return FixedArray::kHeaderSize + offset;
|
|
}
|
|
|
|
bool unboxed_double() {
|
|
return UnboxedDoubleBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual Code::StubType GetStubType() { return Code::FAST; }
|
|
|
|
protected:
|
|
LoadFieldStub() : HandlerStub() { }
|
|
|
|
void Initialize(Code::Kind kind,
|
|
bool inobject,
|
|
int index,
|
|
Representation representation) {
|
|
bool unboxed_double = FLAG_track_double_fields && representation.IsDouble();
|
|
bit_field_ = KindBits::encode(kind)
|
|
| InobjectBits::encode(inobject)
|
|
| IndexBits::encode(index)
|
|
| UnboxedDoubleBits::encode(unboxed_double);
|
|
}
|
|
|
|
private:
|
|
STATIC_ASSERT(KindBits::kSize == 4);
|
|
class InobjectBits: public BitField<bool, 4, 1> {};
|
|
class IndexBits: public BitField<int, 5, 11> {};
|
|
class UnboxedDoubleBits: public BitField<bool, 16, 1> {};
|
|
virtual CodeStub::Major MajorKey() { return LoadField; }
|
|
};
|
|
|
|
|
|
class StoreGlobalStub : public HandlerStub {
|
|
public:
|
|
explicit StoreGlobalStub(bool is_constant) {
|
|
bit_field_ = IsConstantBits::encode(is_constant);
|
|
}
|
|
|
|
Handle<Code> GetCodeCopyFromTemplate(Isolate* isolate,
|
|
Map* receiver_map,
|
|
PropertyCell* cell) {
|
|
Handle<Code> code = CodeStub::GetCodeCopyFromTemplate(isolate);
|
|
// Replace the placeholder cell and global object map with the actual global
|
|
// cell and receiver map.
|
|
Map* cell_map = isolate->heap()->global_property_cell_map();
|
|
code->ReplaceNthObject(1, cell_map, cell);
|
|
code->ReplaceNthObject(1, isolate->heap()->meta_map(), receiver_map);
|
|
return code;
|
|
}
|
|
|
|
virtual Code::Kind kind() const { return Code::STORE_IC; }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
bool is_constant() {
|
|
return IsConstantBits::decode(bit_field_);
|
|
}
|
|
void set_is_constant(bool value) {
|
|
bit_field_ = IsConstantBits::update(bit_field_, value);
|
|
}
|
|
|
|
Representation representation() {
|
|
return Representation::FromKind(RepresentationBits::decode(bit_field_));
|
|
}
|
|
void set_representation(Representation r) {
|
|
bit_field_ = RepresentationBits::update(bit_field_, r.kind());
|
|
}
|
|
|
|
private:
|
|
Major MajorKey() { return StoreGlobal; }
|
|
|
|
class IsConstantBits: public BitField<bool, 0, 1> {};
|
|
class RepresentationBits: public BitField<Representation::Kind, 1, 8> {};
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StoreGlobalStub);
|
|
};
|
|
|
|
|
|
class CallApiFunctionStub : public PlatformCodeStub {
|
|
public:
|
|
CallApiFunctionStub(bool is_store,
|
|
bool call_data_undefined,
|
|
int argc) {
|
|
bit_field_ =
|
|
IsStoreBits::encode(is_store) |
|
|
CallDataUndefinedBits::encode(call_data_undefined) |
|
|
ArgumentBits::encode(argc);
|
|
ASSERT(!is_store || argc == 1);
|
|
}
|
|
|
|
private:
|
|
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
|
|
virtual Major MajorKey() V8_OVERRIDE { return CallApiFunction; }
|
|
virtual int MinorKey() V8_OVERRIDE { return bit_field_; }
|
|
|
|
class IsStoreBits: public BitField<bool, 0, 1> {};
|
|
class CallDataUndefinedBits: public BitField<bool, 1, 1> {};
|
|
class ArgumentBits: public BitField<int, 2, Code::kArgumentsBits> {};
|
|
|
|
int bit_field_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(CallApiFunctionStub);
|
|
};
|
|
|
|
|
|
class CallApiGetterStub : public PlatformCodeStub {
|
|
public:
|
|
CallApiGetterStub() {}
|
|
|
|
private:
|
|
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
|
|
virtual Major MajorKey() V8_OVERRIDE { return CallApiGetter; }
|
|
virtual int MinorKey() V8_OVERRIDE { return 0; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(CallApiGetterStub);
|
|
};
|
|
|
|
|
|
class KeyedLoadFieldStub: public LoadFieldStub {
|
|
public:
|
|
KeyedLoadFieldStub(bool inobject, int index, Representation representation)
|
|
: LoadFieldStub() {
|
|
Initialize(Code::KEYED_LOAD_IC, inobject, index, representation);
|
|
}
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
private:
|
|
virtual CodeStub::Major MajorKey() { return KeyedLoadField; }
|
|
};
|
|
|
|
|
|
class BinaryOpICStub : public HydrogenCodeStub {
|
|
public:
|
|
BinaryOpICStub(Token::Value op, OverwriteMode mode)
|
|
: HydrogenCodeStub(UNINITIALIZED), state_(op, mode) {}
|
|
|
|
explicit BinaryOpICStub(const BinaryOpIC::State& state) : state_(state) {}
|
|
|
|
static void GenerateAheadOfTime(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate, CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
|
|
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
virtual Code::Kind GetCodeKind() const V8_OVERRIDE {
|
|
return Code::BINARY_OP_IC;
|
|
}
|
|
|
|
virtual InlineCacheState GetICState() V8_FINAL V8_OVERRIDE {
|
|
return state_.GetICState();
|
|
}
|
|
|
|
virtual ExtraICState GetExtraICState() V8_FINAL V8_OVERRIDE {
|
|
return state_.GetExtraICState();
|
|
}
|
|
|
|
virtual void VerifyPlatformFeatures(Isolate* isolate) V8_FINAL V8_OVERRIDE {
|
|
ASSERT(CpuFeatures::VerifyCrossCompiling(SSE2));
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
|
|
|
|
const BinaryOpIC::State& state() const { return state_; }
|
|
|
|
virtual void PrintState(StringStream* stream) V8_FINAL V8_OVERRIDE;
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE { return BinaryOpIC; }
|
|
virtual int NotMissMinorKey() V8_FINAL V8_OVERRIDE {
|
|
return GetExtraICState();
|
|
}
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kLeft = 0;
|
|
static const int kRight = 1;
|
|
|
|
private:
|
|
static void GenerateAheadOfTime(Isolate* isolate,
|
|
const BinaryOpIC::State& state);
|
|
|
|
BinaryOpIC::State state_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(BinaryOpICStub);
|
|
};
|
|
|
|
|
|
class ArrayPushStub: public PlatformCodeStub {
|
|
public:
|
|
ArrayPushStub(ElementsKind kind, int argc) {
|
|
bit_field_ = ElementsKindBits::encode(kind) | ArgcBits::encode(argc);
|
|
}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
int arguments_count() { return ArgcBits::decode(bit_field_); }
|
|
ElementsKind elements_kind() {
|
|
return ElementsKindBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual CodeStub::Major MajorKey() { return ArrayPush; }
|
|
virtual int MinorKey() { return bit_field_; }
|
|
|
|
class ElementsKindBits: public BitField<ElementsKind, 0, 3> {};
|
|
class ArgcBits: public BitField<int, 3, Code::kArgumentsBits> {};
|
|
|
|
int bit_field_;
|
|
};
|
|
|
|
|
|
// TODO(bmeurer): Merge this into the BinaryOpICStub once we have proper tail
|
|
// call support for stubs in Hydrogen.
|
|
class BinaryOpICWithAllocationSiteStub V8_FINAL : public PlatformCodeStub {
|
|
public:
|
|
explicit BinaryOpICWithAllocationSiteStub(const BinaryOpIC::State& state)
|
|
: state_(state) {}
|
|
|
|
static void GenerateAheadOfTime(Isolate* isolate);
|
|
|
|
Handle<Code> GetCodeCopyFromTemplate(Isolate* isolate,
|
|
Handle<AllocationSite> allocation_site) {
|
|
Handle<Code> code = CodeStub::GetCodeCopyFromTemplate(isolate);
|
|
// Replace the placeholder oddball with the actual allocation site.
|
|
code->ReplaceNthObject(1, isolate->heap()->oddball_map(), *allocation_site);
|
|
return code;
|
|
}
|
|
|
|
virtual Code::Kind GetCodeKind() const V8_OVERRIDE {
|
|
return Code::BINARY_OP_IC;
|
|
}
|
|
|
|
virtual InlineCacheState GetICState() V8_OVERRIDE {
|
|
return state_.GetICState();
|
|
}
|
|
|
|
virtual ExtraICState GetExtraICState() V8_OVERRIDE {
|
|
return state_.GetExtraICState();
|
|
}
|
|
|
|
virtual void VerifyPlatformFeatures(Isolate* isolate) V8_OVERRIDE {
|
|
ASSERT(CpuFeatures::VerifyCrossCompiling(SSE2));
|
|
}
|
|
|
|
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
|
|
|
|
virtual void PrintState(StringStream* stream) V8_OVERRIDE;
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE { return BinaryOpICWithAllocationSite; }
|
|
virtual int MinorKey() V8_OVERRIDE { return GetExtraICState(); }
|
|
|
|
private:
|
|
static void GenerateAheadOfTime(Isolate* isolate,
|
|
const BinaryOpIC::State& state);
|
|
|
|
BinaryOpIC::State state_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(BinaryOpICWithAllocationSiteStub);
|
|
};
|
|
|
|
|
|
class BinaryOpWithAllocationSiteStub V8_FINAL : public BinaryOpICStub {
|
|
public:
|
|
BinaryOpWithAllocationSiteStub(Token::Value op, OverwriteMode mode)
|
|
: BinaryOpICStub(op, mode) {}
|
|
|
|
explicit BinaryOpWithAllocationSiteStub(const BinaryOpIC::State& state)
|
|
: BinaryOpICStub(state) {}
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate, CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
|
|
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
virtual Code::Kind GetCodeKind() const V8_FINAL V8_OVERRIDE {
|
|
return Code::STUB;
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE {
|
|
return BinaryOpWithAllocationSite;
|
|
}
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kAllocationSite = 0;
|
|
static const int kLeft = 1;
|
|
static const int kRight = 2;
|
|
};
|
|
|
|
|
|
enum StringAddFlags {
|
|
// Omit both parameter checks.
|
|
STRING_ADD_CHECK_NONE = 0,
|
|
// Check left parameter.
|
|
STRING_ADD_CHECK_LEFT = 1 << 0,
|
|
// Check right parameter.
|
|
STRING_ADD_CHECK_RIGHT = 1 << 1,
|
|
// Check both parameters.
|
|
STRING_ADD_CHECK_BOTH = STRING_ADD_CHECK_LEFT | STRING_ADD_CHECK_RIGHT
|
|
};
|
|
|
|
|
|
class StringAddStub V8_FINAL : public HydrogenCodeStub {
|
|
public:
|
|
StringAddStub(StringAddFlags flags, PretenureFlag pretenure_flag)
|
|
: bit_field_(StringAddFlagsBits::encode(flags) |
|
|
PretenureFlagBits::encode(pretenure_flag)) {}
|
|
|
|
StringAddFlags flags() const {
|
|
return StringAddFlagsBits::decode(bit_field_);
|
|
}
|
|
|
|
PretenureFlag pretenure_flag() const {
|
|
return PretenureFlagBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual void VerifyPlatformFeatures(Isolate* isolate) V8_OVERRIDE {
|
|
ASSERT(CpuFeatures::VerifyCrossCompiling(SSE2));
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
|
|
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kLeft = 0;
|
|
static const int kRight = 1;
|
|
|
|
private:
|
|
class StringAddFlagsBits: public BitField<StringAddFlags, 0, 2> {};
|
|
class PretenureFlagBits: public BitField<PretenureFlag, 2, 1> {};
|
|
uint32_t bit_field_;
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE { return StringAdd; }
|
|
virtual int NotMissMinorKey() V8_OVERRIDE { return bit_field_; }
|
|
|
|
virtual void PrintBaseName(StringStream* stream) V8_OVERRIDE;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StringAddStub);
|
|
};
|
|
|
|
|
|
class ICCompareStub: public PlatformCodeStub {
|
|
public:
|
|
ICCompareStub(Token::Value op,
|
|
CompareIC::State left,
|
|
CompareIC::State right,
|
|
CompareIC::State handler)
|
|
: op_(op),
|
|
left_(left),
|
|
right_(right),
|
|
state_(handler) {
|
|
ASSERT(Token::IsCompareOp(op));
|
|
}
|
|
|
|
virtual void Generate(MacroAssembler* masm);
|
|
|
|
void set_known_map(Handle<Map> map) { known_map_ = map; }
|
|
|
|
static void DecodeMinorKey(int minor_key,
|
|
CompareIC::State* left_state,
|
|
CompareIC::State* right_state,
|
|
CompareIC::State* handler_state,
|
|
Token::Value* op);
|
|
|
|
virtual InlineCacheState GetICState();
|
|
|
|
private:
|
|
class OpField: public BitField<int, 0, 3> { };
|
|
class LeftStateField: public BitField<int, 3, 4> { };
|
|
class RightStateField: public BitField<int, 7, 4> { };
|
|
class HandlerStateField: public BitField<int, 11, 4> { };
|
|
|
|
virtual void FinishCode(Handle<Code> code) {
|
|
code->set_stub_info(MinorKey());
|
|
}
|
|
|
|
virtual CodeStub::Major MajorKey() { return CompareIC; }
|
|
virtual int MinorKey();
|
|
|
|
virtual Code::Kind GetCodeKind() const { return Code::COMPARE_IC; }
|
|
|
|
void GenerateSmis(MacroAssembler* masm);
|
|
void GenerateNumbers(MacroAssembler* masm);
|
|
void GenerateInternalizedStrings(MacroAssembler* masm);
|
|
void GenerateStrings(MacroAssembler* masm);
|
|
void GenerateUniqueNames(MacroAssembler* masm);
|
|
void GenerateObjects(MacroAssembler* masm);
|
|
void GenerateMiss(MacroAssembler* masm);
|
|
void GenerateKnownObjects(MacroAssembler* masm);
|
|
void GenerateGeneric(MacroAssembler* masm);
|
|
|
|
bool strict() const { return op_ == Token::EQ_STRICT; }
|
|
Condition GetCondition() const { return CompareIC::ComputeCondition(op_); }
|
|
|
|
virtual void AddToSpecialCache(Handle<Code> new_object);
|
|
virtual bool FindCodeInSpecialCache(Code** code_out, Isolate* isolate);
|
|
virtual bool UseSpecialCache() { return state_ == CompareIC::KNOWN_OBJECT; }
|
|
|
|
Token::Value op_;
|
|
CompareIC::State left_;
|
|
CompareIC::State right_;
|
|
CompareIC::State state_;
|
|
Handle<Map> known_map_;
|
|
};
|
|
|
|
|
|
class CompareNilICStub : public HydrogenCodeStub {
|
|
public:
|
|
Type* GetType(Zone* zone, Handle<Map> map = Handle<Map>());
|
|
Type* GetInputType(Zone* zone, Handle<Map> map);
|
|
|
|
explicit CompareNilICStub(NilValue nil) : nil_value_(nil) { }
|
|
|
|
CompareNilICStub(ExtraICState ic_state,
|
|
InitializationState init_state = INITIALIZED)
|
|
: HydrogenCodeStub(init_state),
|
|
nil_value_(NilValueField::decode(ic_state)),
|
|
state_(State(TypesField::decode(ic_state))) {
|
|
}
|
|
|
|
static Handle<Code> GetUninitialized(Isolate* isolate,
|
|
NilValue nil) {
|
|
return CompareNilICStub(nil, UNINITIALIZED).GetCode(isolate);
|
|
}
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
static void InitializeForIsolate(Isolate* isolate) {
|
|
CompareNilICStub compare_stub(kNullValue, UNINITIALIZED);
|
|
compare_stub.InitializeInterfaceDescriptor(
|
|
isolate,
|
|
isolate->code_stub_interface_descriptor(CodeStub::CompareNilIC));
|
|
}
|
|
|
|
virtual InlineCacheState GetICState() {
|
|
if (state_.Contains(GENERIC)) {
|
|
return MEGAMORPHIC;
|
|
} else if (state_.Contains(MONOMORPHIC_MAP)) {
|
|
return MONOMORPHIC;
|
|
} else {
|
|
return PREMONOMORPHIC;
|
|
}
|
|
}
|
|
|
|
virtual Code::Kind GetCodeKind() const { return Code::COMPARE_NIL_IC; }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual ExtraICState GetExtraICState() {
|
|
return NilValueField::encode(nil_value_) |
|
|
TypesField::encode(state_.ToIntegral());
|
|
}
|
|
|
|
void UpdateStatus(Handle<Object> object);
|
|
|
|
bool IsMonomorphic() const { return state_.Contains(MONOMORPHIC_MAP); }
|
|
NilValue GetNilValue() const { return nil_value_; }
|
|
void ClearState() { state_.RemoveAll(); }
|
|
|
|
virtual void PrintState(StringStream* stream);
|
|
virtual void PrintBaseName(StringStream* stream);
|
|
|
|
private:
|
|
friend class CompareNilIC;
|
|
|
|
enum CompareNilType {
|
|
UNDEFINED,
|
|
NULL_TYPE,
|
|
MONOMORPHIC_MAP,
|
|
GENERIC,
|
|
NUMBER_OF_TYPES
|
|
};
|
|
|
|
// At most 6 different types can be distinguished, because the Code object
|
|
// only has room for a single byte to hold a set and there are two more
|
|
// boolean flags we need to store. :-P
|
|
STATIC_ASSERT(NUMBER_OF_TYPES <= 6);
|
|
|
|
class State : public EnumSet<CompareNilType, byte> {
|
|
public:
|
|
State() : EnumSet<CompareNilType, byte>(0) { }
|
|
explicit State(byte bits) : EnumSet<CompareNilType, byte>(bits) { }
|
|
|
|
void Print(StringStream* stream) const;
|
|
};
|
|
|
|
CompareNilICStub(NilValue nil, InitializationState init_state)
|
|
: HydrogenCodeStub(init_state), nil_value_(nil) { }
|
|
|
|
class NilValueField : public BitField<NilValue, 0, 1> {};
|
|
class TypesField : public BitField<byte, 1, NUMBER_OF_TYPES> {};
|
|
|
|
virtual CodeStub::Major MajorKey() { return CompareNilIC; }
|
|
virtual int NotMissMinorKey() { return GetExtraICState(); }
|
|
|
|
NilValue nil_value_;
|
|
State state_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(CompareNilICStub);
|
|
};
|
|
|
|
|
|
class CEntryStub : public PlatformCodeStub {
|
|
public:
|
|
explicit CEntryStub(int result_size,
|
|
SaveFPRegsMode save_doubles = kDontSaveFPRegs)
|
|
: result_size_(result_size), save_doubles_(save_doubles) { }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
// The version of this stub that doesn't save doubles is generated ahead of
|
|
// time, so it's OK to call it from other stubs that can't cope with GC during
|
|
// their code generation. On machines that always have gp registers (x64) we
|
|
// can generate both variants ahead of time.
|
|
static void GenerateAheadOfTime(Isolate* isolate);
|
|
|
|
protected:
|
|
virtual void VerifyPlatformFeatures(Isolate* isolate) V8_OVERRIDE {
|
|
ASSERT(CpuFeatures::VerifyCrossCompiling(SSE2));
|
|
};
|
|
|
|
private:
|
|
void GenerateCore(MacroAssembler* masm,
|
|
Label* throw_normal_exception,
|
|
Label* throw_termination_exception,
|
|
Label* throw_out_of_memory_exception,
|
|
bool do_gc,
|
|
bool always_allocate_scope);
|
|
|
|
// Number of pointers/values returned.
|
|
Isolate* isolate_;
|
|
const int result_size_;
|
|
SaveFPRegsMode save_doubles_;
|
|
|
|
Major MajorKey() { return CEntry; }
|
|
int MinorKey();
|
|
|
|
bool NeedsImmovableCode();
|
|
};
|
|
|
|
|
|
class JSEntryStub : public PlatformCodeStub {
|
|
public:
|
|
JSEntryStub() { }
|
|
|
|
void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
|
|
|
|
protected:
|
|
void GenerateBody(MacroAssembler* masm, bool is_construct);
|
|
|
|
private:
|
|
Major MajorKey() { return JSEntry; }
|
|
int MinorKey() { return 0; }
|
|
|
|
virtual void FinishCode(Handle<Code> code);
|
|
|
|
int handler_offset_;
|
|
};
|
|
|
|
|
|
class JSConstructEntryStub : public JSEntryStub {
|
|
public:
|
|
JSConstructEntryStub() { }
|
|
|
|
void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
|
|
|
|
private:
|
|
int MinorKey() { return 1; }
|
|
|
|
virtual void PrintName(StringStream* stream) {
|
|
stream->Add("JSConstructEntryStub");
|
|
}
|
|
};
|
|
|
|
|
|
class ArgumentsAccessStub: public PlatformCodeStub {
|
|
public:
|
|
enum Type {
|
|
READ_ELEMENT,
|
|
NEW_NON_STRICT_FAST,
|
|
NEW_NON_STRICT_SLOW,
|
|
NEW_STRICT
|
|
};
|
|
|
|
explicit ArgumentsAccessStub(Type type) : type_(type) { }
|
|
|
|
private:
|
|
Type type_;
|
|
|
|
Major MajorKey() { return ArgumentsAccess; }
|
|
int MinorKey() { return type_; }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
void GenerateReadElement(MacroAssembler* masm);
|
|
void GenerateNewStrict(MacroAssembler* masm);
|
|
void GenerateNewNonStrictFast(MacroAssembler* masm);
|
|
void GenerateNewNonStrictSlow(MacroAssembler* masm);
|
|
|
|
virtual void PrintName(StringStream* stream);
|
|
};
|
|
|
|
|
|
class RegExpExecStub: public PlatformCodeStub {
|
|
public:
|
|
RegExpExecStub() { }
|
|
|
|
private:
|
|
Major MajorKey() { return RegExpExec; }
|
|
int MinorKey() { return 0; }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
};
|
|
|
|
|
|
class RegExpConstructResultStub V8_FINAL : public HydrogenCodeStub {
|
|
public:
|
|
RegExpConstructResultStub() { }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
|
|
|
|
virtual Major MajorKey() V8_OVERRIDE { return RegExpConstructResult; }
|
|
virtual int NotMissMinorKey() V8_OVERRIDE { return 0; }
|
|
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kLength = 0;
|
|
static const int kIndex = 1;
|
|
static const int kInput = 2;
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(RegExpConstructResultStub);
|
|
};
|
|
|
|
|
|
class CallFunctionStub: public PlatformCodeStub {
|
|
public:
|
|
CallFunctionStub(int argc, CallFunctionFlags flags)
|
|
: argc_(argc), flags_(flags) { }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
virtual void FinishCode(Handle<Code> code) {
|
|
code->set_has_function_cache(RecordCallTarget());
|
|
}
|
|
|
|
static int ExtractArgcFromMinorKey(int minor_key) {
|
|
return ArgcBits::decode(minor_key);
|
|
}
|
|
|
|
private:
|
|
int argc_;
|
|
CallFunctionFlags flags_;
|
|
|
|
virtual void PrintName(StringStream* stream);
|
|
|
|
// Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
|
|
class FlagBits: public BitField<CallFunctionFlags, 0, 2> {};
|
|
class ArgcBits: public BitField<unsigned, 2, 32 - 2> {};
|
|
|
|
Major MajorKey() { return CallFunction; }
|
|
int MinorKey() {
|
|
// Encode the parameters in a unique 32 bit value.
|
|
return FlagBits::encode(flags_) | ArgcBits::encode(argc_);
|
|
}
|
|
|
|
bool RecordCallTarget() {
|
|
return flags_ == RECORD_CALL_TARGET;
|
|
}
|
|
|
|
bool CallAsMethod() {
|
|
return flags_ == CALL_AS_METHOD || flags_ == WRAP_AND_CALL;
|
|
}
|
|
|
|
bool NeedsChecks() {
|
|
return flags_ != WRAP_AND_CALL;
|
|
}
|
|
};
|
|
|
|
|
|
class CallConstructStub: public PlatformCodeStub {
|
|
public:
|
|
explicit CallConstructStub(CallFunctionFlags flags) : flags_(flags) {}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
virtual void FinishCode(Handle<Code> code) {
|
|
code->set_has_function_cache(RecordCallTarget());
|
|
}
|
|
|
|
private:
|
|
CallFunctionFlags flags_;
|
|
|
|
virtual void PrintName(StringStream* stream);
|
|
|
|
Major MajorKey() { return CallConstruct; }
|
|
int MinorKey() { return flags_; }
|
|
|
|
bool RecordCallTarget() {
|
|
return (flags_ & RECORD_CALL_TARGET) != 0;
|
|
}
|
|
|
|
bool CallAsMethod() {
|
|
return (flags_ & CALL_AS_METHOD) != 0;
|
|
}
|
|
};
|
|
|
|
|
|
enum StringIndexFlags {
|
|
// Accepts smis or heap numbers.
|
|
STRING_INDEX_IS_NUMBER,
|
|
|
|
// Accepts smis or heap numbers that are valid array indices
|
|
// (ECMA-262 15.4). Invalid indices are reported as being out of
|
|
// range.
|
|
STRING_INDEX_IS_ARRAY_INDEX
|
|
};
|
|
|
|
|
|
// Generates code implementing String.prototype.charCodeAt.
|
|
//
|
|
// Only supports the case when the receiver is a string and the index
|
|
// is a number (smi or heap number) that is a valid index into the
|
|
// string. Additional index constraints are specified by the
|
|
// flags. Otherwise, bails out to the provided labels.
|
|
//
|
|
// Register usage: |object| may be changed to another string in a way
|
|
// that doesn't affect charCodeAt/charAt semantics, |index| is
|
|
// preserved, |scratch| and |result| are clobbered.
|
|
class StringCharCodeAtGenerator {
|
|
public:
|
|
StringCharCodeAtGenerator(Register object,
|
|
Register index,
|
|
Register result,
|
|
Label* receiver_not_string,
|
|
Label* index_not_number,
|
|
Label* index_out_of_range,
|
|
StringIndexFlags index_flags)
|
|
: object_(object),
|
|
index_(index),
|
|
result_(result),
|
|
receiver_not_string_(receiver_not_string),
|
|
index_not_number_(index_not_number),
|
|
index_out_of_range_(index_out_of_range),
|
|
index_flags_(index_flags) {
|
|
ASSERT(!result_.is(object_));
|
|
ASSERT(!result_.is(index_));
|
|
}
|
|
|
|
// Generates the fast case code. On the fallthrough path |result|
|
|
// register contains the result.
|
|
void GenerateFast(MacroAssembler* masm);
|
|
|
|
// Generates the slow case code. Must not be naturally
|
|
// reachable. Expected to be put after a ret instruction (e.g., in
|
|
// deferred code). Always jumps back to the fast case.
|
|
void GenerateSlow(MacroAssembler* masm,
|
|
const RuntimeCallHelper& call_helper);
|
|
|
|
// Skip handling slow case and directly jump to bailout.
|
|
void SkipSlow(MacroAssembler* masm, Label* bailout) {
|
|
masm->bind(&index_not_smi_);
|
|
masm->bind(&call_runtime_);
|
|
masm->jmp(bailout);
|
|
}
|
|
|
|
private:
|
|
Register object_;
|
|
Register index_;
|
|
Register result_;
|
|
|
|
Label* receiver_not_string_;
|
|
Label* index_not_number_;
|
|
Label* index_out_of_range_;
|
|
|
|
StringIndexFlags index_flags_;
|
|
|
|
Label call_runtime_;
|
|
Label index_not_smi_;
|
|
Label got_smi_index_;
|
|
Label exit_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StringCharCodeAtGenerator);
|
|
};
|
|
|
|
|
|
// Generates code for creating a one-char string from a char code.
|
|
class StringCharFromCodeGenerator {
|
|
public:
|
|
StringCharFromCodeGenerator(Register code,
|
|
Register result)
|
|
: code_(code),
|
|
result_(result) {
|
|
ASSERT(!code_.is(result_));
|
|
}
|
|
|
|
// Generates the fast case code. On the fallthrough path |result|
|
|
// register contains the result.
|
|
void GenerateFast(MacroAssembler* masm);
|
|
|
|
// Generates the slow case code. Must not be naturally
|
|
// reachable. Expected to be put after a ret instruction (e.g., in
|
|
// deferred code). Always jumps back to the fast case.
|
|
void GenerateSlow(MacroAssembler* masm,
|
|
const RuntimeCallHelper& call_helper);
|
|
|
|
// Skip handling slow case and directly jump to bailout.
|
|
void SkipSlow(MacroAssembler* masm, Label* bailout) {
|
|
masm->bind(&slow_case_);
|
|
masm->jmp(bailout);
|
|
}
|
|
|
|
private:
|
|
Register code_;
|
|
Register result_;
|
|
|
|
Label slow_case_;
|
|
Label exit_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StringCharFromCodeGenerator);
|
|
};
|
|
|
|
|
|
// Generates code implementing String.prototype.charAt.
|
|
//
|
|
// Only supports the case when the receiver is a string and the index
|
|
// is a number (smi or heap number) that is a valid index into the
|
|
// string. Additional index constraints are specified by the
|
|
// flags. Otherwise, bails out to the provided labels.
|
|
//
|
|
// Register usage: |object| may be changed to another string in a way
|
|
// that doesn't affect charCodeAt/charAt semantics, |index| is
|
|
// preserved, |scratch1|, |scratch2|, and |result| are clobbered.
|
|
class StringCharAtGenerator {
|
|
public:
|
|
StringCharAtGenerator(Register object,
|
|
Register index,
|
|
Register scratch,
|
|
Register result,
|
|
Label* receiver_not_string,
|
|
Label* index_not_number,
|
|
Label* index_out_of_range,
|
|
StringIndexFlags index_flags)
|
|
: char_code_at_generator_(object,
|
|
index,
|
|
scratch,
|
|
receiver_not_string,
|
|
index_not_number,
|
|
index_out_of_range,
|
|
index_flags),
|
|
char_from_code_generator_(scratch, result) {}
|
|
|
|
// Generates the fast case code. On the fallthrough path |result|
|
|
// register contains the result.
|
|
void GenerateFast(MacroAssembler* masm) {
|
|
char_code_at_generator_.GenerateFast(masm);
|
|
char_from_code_generator_.GenerateFast(masm);
|
|
}
|
|
|
|
// Generates the slow case code. Must not be naturally
|
|
// reachable. Expected to be put after a ret instruction (e.g., in
|
|
// deferred code). Always jumps back to the fast case.
|
|
void GenerateSlow(MacroAssembler* masm,
|
|
const RuntimeCallHelper& call_helper) {
|
|
char_code_at_generator_.GenerateSlow(masm, call_helper);
|
|
char_from_code_generator_.GenerateSlow(masm, call_helper);
|
|
}
|
|
|
|
// Skip handling slow case and directly jump to bailout.
|
|
void SkipSlow(MacroAssembler* masm, Label* bailout) {
|
|
char_code_at_generator_.SkipSlow(masm, bailout);
|
|
char_from_code_generator_.SkipSlow(masm, bailout);
|
|
}
|
|
|
|
private:
|
|
StringCharCodeAtGenerator char_code_at_generator_;
|
|
StringCharFromCodeGenerator char_from_code_generator_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
|
|
};
|
|
|
|
|
|
class KeyedLoadDictionaryElementStub : public HydrogenCodeStub {
|
|
public:
|
|
KeyedLoadDictionaryElementStub() {}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate) V8_OVERRIDE;
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
|
|
|
|
private:
|
|
Major MajorKey() { return KeyedLoadElement; }
|
|
int NotMissMinorKey() { return DICTIONARY_ELEMENTS; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(KeyedLoadDictionaryElementStub);
|
|
};
|
|
|
|
|
|
class KeyedLoadDictionaryElementPlatformStub : public PlatformCodeStub {
|
|
public:
|
|
KeyedLoadDictionaryElementPlatformStub() {}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
Major MajorKey() { return KeyedLoadElement; }
|
|
int MinorKey() { return DICTIONARY_ELEMENTS; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(KeyedLoadDictionaryElementPlatformStub);
|
|
};
|
|
|
|
|
|
class DoubleToIStub : public PlatformCodeStub {
|
|
public:
|
|
DoubleToIStub(Register source,
|
|
Register destination,
|
|
int offset,
|
|
bool is_truncating,
|
|
bool skip_fastpath = false) : bit_field_(0) {
|
|
bit_field_ = SourceRegisterBits::encode(source.code()) |
|
|
DestinationRegisterBits::encode(destination.code()) |
|
|
OffsetBits::encode(offset) |
|
|
IsTruncatingBits::encode(is_truncating) |
|
|
SkipFastPathBits::encode(skip_fastpath) |
|
|
SSEBits::encode(CpuFeatures::IsSafeForSnapshot(SSE2) ?
|
|
CpuFeatures::IsSafeForSnapshot(SSE3) ? 2 : 1 : 0);
|
|
}
|
|
|
|
Register source() {
|
|
return Register::from_code(SourceRegisterBits::decode(bit_field_));
|
|
}
|
|
|
|
Register destination() {
|
|
return Register::from_code(DestinationRegisterBits::decode(bit_field_));
|
|
}
|
|
|
|
bool is_truncating() {
|
|
return IsTruncatingBits::decode(bit_field_);
|
|
}
|
|
|
|
bool skip_fastpath() {
|
|
return SkipFastPathBits::decode(bit_field_);
|
|
}
|
|
|
|
int offset() {
|
|
return OffsetBits::decode(bit_field_);
|
|
}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
virtual bool SometimesSetsUpAFrame() { return false; }
|
|
|
|
protected:
|
|
virtual void VerifyPlatformFeatures(Isolate* isolate) V8_OVERRIDE {
|
|
ASSERT(CpuFeatures::VerifyCrossCompiling(SSE2));
|
|
}
|
|
|
|
private:
|
|
static const int kBitsPerRegisterNumber = 6;
|
|
STATIC_ASSERT((1L << kBitsPerRegisterNumber) >= Register::kNumRegisters);
|
|
class SourceRegisterBits:
|
|
public BitField<int, 0, kBitsPerRegisterNumber> {}; // NOLINT
|
|
class DestinationRegisterBits:
|
|
public BitField<int, kBitsPerRegisterNumber,
|
|
kBitsPerRegisterNumber> {}; // NOLINT
|
|
class IsTruncatingBits:
|
|
public BitField<bool, 2 * kBitsPerRegisterNumber, 1> {}; // NOLINT
|
|
class OffsetBits:
|
|
public BitField<int, 2 * kBitsPerRegisterNumber + 1, 3> {}; // NOLINT
|
|
class SkipFastPathBits:
|
|
public BitField<int, 2 * kBitsPerRegisterNumber + 4, 1> {}; // NOLINT
|
|
class SSEBits:
|
|
public BitField<int, 2 * kBitsPerRegisterNumber + 5, 2> {}; // NOLINT
|
|
|
|
Major MajorKey() { return DoubleToI; }
|
|
int MinorKey() { return bit_field_; }
|
|
|
|
int bit_field_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DoubleToIStub);
|
|
};
|
|
|
|
|
|
class KeyedLoadFastElementStub : public HydrogenCodeStub {
|
|
public:
|
|
KeyedLoadFastElementStub(bool is_js_array, ElementsKind elements_kind) {
|
|
bit_field_ = ElementsKindBits::encode(elements_kind) |
|
|
IsJSArrayBits::encode(is_js_array);
|
|
}
|
|
|
|
bool is_js_array() const {
|
|
return IsJSArrayBits::decode(bit_field_);
|
|
}
|
|
|
|
ElementsKind elements_kind() const {
|
|
return ElementsKindBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
|
|
class IsJSArrayBits: public BitField<bool, 8, 1> {};
|
|
uint32_t bit_field_;
|
|
|
|
Major MajorKey() { return KeyedLoadElement; }
|
|
int NotMissMinorKey() { return bit_field_; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(KeyedLoadFastElementStub);
|
|
};
|
|
|
|
|
|
class KeyedStoreFastElementStub : public HydrogenCodeStub {
|
|
public:
|
|
KeyedStoreFastElementStub(bool is_js_array,
|
|
ElementsKind elements_kind,
|
|
KeyedAccessStoreMode mode) {
|
|
bit_field_ = ElementsKindBits::encode(elements_kind) |
|
|
IsJSArrayBits::encode(is_js_array) |
|
|
StoreModeBits::encode(mode);
|
|
}
|
|
|
|
bool is_js_array() const {
|
|
return IsJSArrayBits::decode(bit_field_);
|
|
}
|
|
|
|
ElementsKind elements_kind() const {
|
|
return ElementsKindBits::decode(bit_field_);
|
|
}
|
|
|
|
KeyedAccessStoreMode store_mode() const {
|
|
return StoreModeBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
|
|
class StoreModeBits: public BitField<KeyedAccessStoreMode, 8, 4> {};
|
|
class IsJSArrayBits: public BitField<bool, 12, 1> {};
|
|
uint32_t bit_field_;
|
|
|
|
Major MajorKey() { return KeyedStoreElement; }
|
|
int NotMissMinorKey() { return bit_field_; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(KeyedStoreFastElementStub);
|
|
};
|
|
|
|
|
|
class TransitionElementsKindStub : public HydrogenCodeStub {
|
|
public:
|
|
TransitionElementsKindStub(ElementsKind from_kind,
|
|
ElementsKind to_kind) {
|
|
bit_field_ = FromKindBits::encode(from_kind) |
|
|
ToKindBits::encode(to_kind);
|
|
}
|
|
|
|
ElementsKind from_kind() const {
|
|
return FromKindBits::decode(bit_field_);
|
|
}
|
|
|
|
ElementsKind to_kind() const {
|
|
return ToKindBits::decode(bit_field_);
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
class FromKindBits: public BitField<ElementsKind, 8, 8> {};
|
|
class ToKindBits: public BitField<ElementsKind, 0, 8> {};
|
|
uint32_t bit_field_;
|
|
|
|
Major MajorKey() { return TransitionElementsKind; }
|
|
int NotMissMinorKey() { return bit_field_; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(TransitionElementsKindStub);
|
|
};
|
|
|
|
|
|
class ArrayConstructorStubBase : public HydrogenCodeStub {
|
|
public:
|
|
ArrayConstructorStubBase(ElementsKind kind,
|
|
AllocationSiteOverrideMode override_mode) {
|
|
// It only makes sense to override local allocation site behavior
|
|
// if there is a difference between the global allocation site policy
|
|
// for an ElementsKind and the desired usage of the stub.
|
|
ASSERT(override_mode != DISABLE_ALLOCATION_SITES ||
|
|
AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE);
|
|
bit_field_ = ElementsKindBits::encode(kind) |
|
|
AllocationSiteOverrideModeBits::encode(override_mode);
|
|
}
|
|
|
|
ElementsKind elements_kind() const {
|
|
return ElementsKindBits::decode(bit_field_);
|
|
}
|
|
|
|
AllocationSiteOverrideMode override_mode() const {
|
|
return AllocationSiteOverrideModeBits::decode(bit_field_);
|
|
}
|
|
|
|
static void GenerateStubsAheadOfTime(Isolate* isolate);
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kConstructor = 0;
|
|
static const int kAllocationSite = 1;
|
|
|
|
protected:
|
|
void BasePrintName(const char* name, StringStream* stream);
|
|
|
|
private:
|
|
int NotMissMinorKey() { return bit_field_; }
|
|
|
|
// Ensure data fits within available bits.
|
|
STATIC_ASSERT(LAST_ALLOCATION_SITE_OVERRIDE_MODE == 1);
|
|
|
|
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
|
|
class AllocationSiteOverrideModeBits: public
|
|
BitField<AllocationSiteOverrideMode, 8, 1> {}; // NOLINT
|
|
uint32_t bit_field_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ArrayConstructorStubBase);
|
|
};
|
|
|
|
|
|
class ArrayNoArgumentConstructorStub : public ArrayConstructorStubBase {
|
|
public:
|
|
ArrayNoArgumentConstructorStub(
|
|
ElementsKind kind,
|
|
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
|
|
: ArrayConstructorStubBase(kind, override_mode) {
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return ArrayNoArgumentConstructor; }
|
|
|
|
virtual void PrintName(StringStream* stream) {
|
|
BasePrintName("ArrayNoArgumentConstructorStub", stream);
|
|
}
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ArrayNoArgumentConstructorStub);
|
|
};
|
|
|
|
|
|
class ArraySingleArgumentConstructorStub : public ArrayConstructorStubBase {
|
|
public:
|
|
ArraySingleArgumentConstructorStub(
|
|
ElementsKind kind,
|
|
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
|
|
: ArrayConstructorStubBase(kind, override_mode) {
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return ArraySingleArgumentConstructor; }
|
|
|
|
virtual void PrintName(StringStream* stream) {
|
|
BasePrintName("ArraySingleArgumentConstructorStub", stream);
|
|
}
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ArraySingleArgumentConstructorStub);
|
|
};
|
|
|
|
|
|
class ArrayNArgumentsConstructorStub : public ArrayConstructorStubBase {
|
|
public:
|
|
ArrayNArgumentsConstructorStub(
|
|
ElementsKind kind,
|
|
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
|
|
: ArrayConstructorStubBase(kind, override_mode) {
|
|
}
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return ArrayNArgumentsConstructor; }
|
|
|
|
virtual void PrintName(StringStream* stream) {
|
|
BasePrintName("ArrayNArgumentsConstructorStub", stream);
|
|
}
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ArrayNArgumentsConstructorStub);
|
|
};
|
|
|
|
|
|
class InternalArrayConstructorStubBase : public HydrogenCodeStub {
|
|
public:
|
|
explicit InternalArrayConstructorStubBase(ElementsKind kind) {
|
|
kind_ = kind;
|
|
}
|
|
|
|
static void GenerateStubsAheadOfTime(Isolate* isolate);
|
|
static void InstallDescriptors(Isolate* isolate);
|
|
|
|
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
|
|
static const int kConstructor = 0;
|
|
|
|
ElementsKind elements_kind() const { return kind_; }
|
|
|
|
private:
|
|
int NotMissMinorKey() { return kind_; }
|
|
|
|
ElementsKind kind_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(InternalArrayConstructorStubBase);
|
|
};
|
|
|
|
|
|
class InternalArrayNoArgumentConstructorStub : public
|
|
InternalArrayConstructorStubBase {
|
|
public:
|
|
explicit InternalArrayNoArgumentConstructorStub(ElementsKind kind)
|
|
: InternalArrayConstructorStubBase(kind) { }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return InternalArrayNoArgumentConstructor; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(InternalArrayNoArgumentConstructorStub);
|
|
};
|
|
|
|
|
|
class InternalArraySingleArgumentConstructorStub : public
|
|
InternalArrayConstructorStubBase {
|
|
public:
|
|
explicit InternalArraySingleArgumentConstructorStub(ElementsKind kind)
|
|
: InternalArrayConstructorStubBase(kind) { }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
Major MajorKey() { return InternalArraySingleArgumentConstructor; }
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(InternalArraySingleArgumentConstructorStub);
|
|
};
|
|
|
|
|
|
class InternalArrayNArgumentsConstructorStub : public
|
|
InternalArrayConstructorStubBase {
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public:
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|
explicit InternalArrayNArgumentsConstructorStub(ElementsKind kind)
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|
: InternalArrayConstructorStubBase(kind) { }
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|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
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|
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
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|
|
|
private:
|
|
Major MajorKey() { return InternalArrayNArgumentsConstructor; }
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|
|
|
DISALLOW_COPY_AND_ASSIGN(InternalArrayNArgumentsConstructorStub);
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|
};
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|
|
|
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|
class KeyedStoreElementStub : public PlatformCodeStub {
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|
public:
|
|
KeyedStoreElementStub(bool is_js_array,
|
|
ElementsKind elements_kind,
|
|
KeyedAccessStoreMode store_mode)
|
|
: is_js_array_(is_js_array),
|
|
elements_kind_(elements_kind),
|
|
store_mode_(store_mode),
|
|
fp_registers_(CanUseFPRegisters()) { }
|
|
|
|
Major MajorKey() { return KeyedStoreElement; }
|
|
int MinorKey() {
|
|
return ElementsKindBits::encode(elements_kind_) |
|
|
IsJSArrayBits::encode(is_js_array_) |
|
|
StoreModeBits::encode(store_mode_) |
|
|
FPRegisters::encode(fp_registers_);
|
|
}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
private:
|
|
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
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|
class StoreModeBits: public BitField<KeyedAccessStoreMode, 8, 4> {};
|
|
class IsJSArrayBits: public BitField<bool, 12, 1> {};
|
|
class FPRegisters: public BitField<bool, 13, 1> {};
|
|
|
|
bool is_js_array_;
|
|
ElementsKind elements_kind_;
|
|
KeyedAccessStoreMode store_mode_;
|
|
bool fp_registers_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(KeyedStoreElementStub);
|
|
};
|
|
|
|
|
|
class ToBooleanStub: public HydrogenCodeStub {
|
|
public:
|
|
enum Type {
|
|
UNDEFINED,
|
|
BOOLEAN,
|
|
NULL_TYPE,
|
|
SMI,
|
|
SPEC_OBJECT,
|
|
STRING,
|
|
SYMBOL,
|
|
HEAP_NUMBER,
|
|
NUMBER_OF_TYPES
|
|
};
|
|
|
|
// At most 8 different types can be distinguished, because the Code object
|
|
// only has room for a single byte to hold a set of these types. :-P
|
|
STATIC_ASSERT(NUMBER_OF_TYPES <= 8);
|
|
|
|
class Types : public EnumSet<Type, byte> {
|
|
public:
|
|
Types() : EnumSet<Type, byte>(0) {}
|
|
explicit Types(byte bits) : EnumSet<Type, byte>(bits) {}
|
|
|
|
byte ToByte() const { return ToIntegral(); }
|
|
void Print(StringStream* stream) const;
|
|
bool UpdateStatus(Handle<Object> object);
|
|
bool NeedsMap() const;
|
|
bool CanBeUndetectable() const;
|
|
bool IsGeneric() const { return ToIntegral() == Generic().ToIntegral(); }
|
|
|
|
static Types Generic() { return Types((1 << NUMBER_OF_TYPES) - 1); }
|
|
};
|
|
|
|
explicit ToBooleanStub(Types types = Types())
|
|
: types_(types) { }
|
|
explicit ToBooleanStub(ExtraICState state)
|
|
: types_(static_cast<byte>(state)) { }
|
|
|
|
bool UpdateStatus(Handle<Object> object);
|
|
Types GetTypes() { return types_; }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
virtual void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
virtual Code::Kind GetCodeKind() const { return Code::TO_BOOLEAN_IC; }
|
|
virtual void PrintState(StringStream* stream);
|
|
|
|
virtual bool SometimesSetsUpAFrame() { return false; }
|
|
|
|
static void InitializeForIsolate(Isolate* isolate) {
|
|
ToBooleanStub stub;
|
|
stub.InitializeInterfaceDescriptor(
|
|
isolate,
|
|
isolate->code_stub_interface_descriptor(CodeStub::ToBoolean));
|
|
}
|
|
|
|
static Handle<Code> GetUninitialized(Isolate* isolate) {
|
|
return ToBooleanStub(UNINITIALIZED).GetCode(isolate);
|
|
}
|
|
|
|
virtual ExtraICState GetExtraICState() {
|
|
return types_.ToIntegral();
|
|
}
|
|
|
|
virtual InlineCacheState GetICState() {
|
|
if (types_.IsEmpty()) {
|
|
return ::v8::internal::UNINITIALIZED;
|
|
} else {
|
|
return MONOMORPHIC;
|
|
}
|
|
}
|
|
|
|
private:
|
|
Major MajorKey() { return ToBoolean; }
|
|
int NotMissMinorKey() { return GetExtraICState(); }
|
|
|
|
explicit ToBooleanStub(InitializationState init_state) :
|
|
HydrogenCodeStub(init_state) {}
|
|
|
|
Types types_;
|
|
};
|
|
|
|
|
|
class ElementsTransitionAndStoreStub : public HydrogenCodeStub {
|
|
public:
|
|
ElementsTransitionAndStoreStub(ElementsKind from_kind,
|
|
ElementsKind to_kind,
|
|
bool is_jsarray,
|
|
KeyedAccessStoreMode store_mode)
|
|
: from_kind_(from_kind),
|
|
to_kind_(to_kind),
|
|
is_jsarray_(is_jsarray),
|
|
store_mode_(store_mode) {}
|
|
|
|
ElementsKind from_kind() const { return from_kind_; }
|
|
ElementsKind to_kind() const { return to_kind_; }
|
|
bool is_jsarray() const { return is_jsarray_; }
|
|
KeyedAccessStoreMode store_mode() const { return store_mode_; }
|
|
|
|
virtual Handle<Code> GenerateCode(Isolate* isolate);
|
|
|
|
void InitializeInterfaceDescriptor(
|
|
Isolate* isolate,
|
|
CodeStubInterfaceDescriptor* descriptor);
|
|
|
|
private:
|
|
class FromBits: public BitField<ElementsKind, 0, 8> {};
|
|
class ToBits: public BitField<ElementsKind, 8, 8> {};
|
|
class IsJSArrayBits: public BitField<bool, 16, 1> {};
|
|
class StoreModeBits: public BitField<KeyedAccessStoreMode, 17, 4> {};
|
|
|
|
Major MajorKey() { return ElementsTransitionAndStore; }
|
|
int NotMissMinorKey() {
|
|
return FromBits::encode(from_kind_) |
|
|
ToBits::encode(to_kind_) |
|
|
IsJSArrayBits::encode(is_jsarray_) |
|
|
StoreModeBits::encode(store_mode_);
|
|
}
|
|
|
|
ElementsKind from_kind_;
|
|
ElementsKind to_kind_;
|
|
bool is_jsarray_;
|
|
KeyedAccessStoreMode store_mode_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ElementsTransitionAndStoreStub);
|
|
};
|
|
|
|
|
|
class StoreArrayLiteralElementStub : public PlatformCodeStub {
|
|
public:
|
|
StoreArrayLiteralElementStub()
|
|
: fp_registers_(CanUseFPRegisters()) { }
|
|
|
|
private:
|
|
class FPRegisters: public BitField<bool, 0, 1> {};
|
|
|
|
Major MajorKey() { return StoreArrayLiteralElement; }
|
|
int MinorKey() { return FPRegisters::encode(fp_registers_); }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
bool fp_registers_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
|
|
};
|
|
|
|
|
|
class StubFailureTrampolineStub : public PlatformCodeStub {
|
|
public:
|
|
explicit StubFailureTrampolineStub(StubFunctionMode function_mode)
|
|
: fp_registers_(CanUseFPRegisters()), function_mode_(function_mode) {}
|
|
|
|
static void GenerateAheadOfTime(Isolate* isolate);
|
|
|
|
private:
|
|
class FPRegisters: public BitField<bool, 0, 1> {};
|
|
class FunctionModeField: public BitField<StubFunctionMode, 1, 1> {};
|
|
|
|
Major MajorKey() { return StubFailureTrampoline; }
|
|
int MinorKey() {
|
|
return FPRegisters::encode(fp_registers_) |
|
|
FunctionModeField::encode(function_mode_);
|
|
}
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
bool fp_registers_;
|
|
StubFunctionMode function_mode_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StubFailureTrampolineStub);
|
|
};
|
|
|
|
|
|
class ProfileEntryHookStub : public PlatformCodeStub {
|
|
public:
|
|
explicit ProfileEntryHookStub() {}
|
|
|
|
// The profile entry hook function is not allowed to cause a GC.
|
|
virtual bool SometimesSetsUpAFrame() { return false; }
|
|
|
|
// Generates a call to the entry hook if it's enabled.
|
|
static void MaybeCallEntryHook(MacroAssembler* masm);
|
|
|
|
private:
|
|
static void EntryHookTrampoline(intptr_t function,
|
|
intptr_t stack_pointer,
|
|
Isolate* isolate);
|
|
|
|
Major MajorKey() { return ProfileEntryHook; }
|
|
int MinorKey() { return 0; }
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
|
|
};
|
|
|
|
|
|
class CallDescriptors {
|
|
public:
|
|
static void InitializeForIsolate(Isolate* isolate);
|
|
};
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_CODE_STUBS_H_
|