deps/v8/src/code-stubs.h
// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_CODE_STUBS_H_
#define V8_CODE_STUBS_H_
#include "src/allocation.h"
#include "src/assembler.h"
#include "src/codegen.h"
#include "src/globals.h"
#include "src/macro-assembler.h"
#include "src/ostreams.h"
namespace v8 {
namespace internal {
// List of code stubs used on all platforms.
#define CODE_STUB_LIST_ALL_PLATFORMS(V) \
V(CallFunction) \
V(CallConstruct) \
V(BinaryOpIC) \
V(BinaryOpICWithAllocationSite) \
V(BinaryOpWithAllocationSite) \
V(StringAdd) \
V(SubString) \
V(StringCompare) \
V(Compare) \
V(CompareIC) \
V(CompareNilIC) \
V(MathPow) \
V(CallIC) \
V(CallIC_Array) \
V(FunctionPrototype) \
V(RecordWrite) \
V(StoreBufferOverflow) \
V(RegExpExec) \
V(Instanceof) \
V(ConvertToDouble) \
V(WriteInt32ToHeapNumber) \
V(StackCheck) \
V(Interrupt) \
V(FastNewClosure) \
V(FastNewContext) \
V(FastCloneShallowArray) \
V(FastCloneShallowObject) \
V(CreateAllocationSite) \
V(ToBoolean) \
V(ToNumber) \
V(ArgumentsAccess) \
V(RegExpConstructResult) \
V(NumberToString) \
V(DoubleToI) \
V(CEntry) \
V(JSEntry) \
V(LoadElement) \
V(KeyedLoadGeneric) \
V(ArrayNoArgumentConstructor) \
V(ArraySingleArgumentConstructor) \
V(ArrayNArgumentsConstructor) \
V(InternalArrayNoArgumentConstructor) \
V(InternalArraySingleArgumentConstructor) \
V(InternalArrayNArgumentsConstructor) \
V(StoreElement) \
V(DebuggerStatement) \
V(NameDictionaryLookup) \
V(ElementsTransitionAndStore) \
V(TransitionElementsKind) \
V(StoreArrayLiteralElement) \
V(StubFailureTrampoline) \
V(ArrayConstructor) \
V(InternalArrayConstructor) \
V(ProfileEntryHook) \
V(StoreGlobal) \
V(CallApiFunction) \
V(CallApiGetter) \
/* IC Handler stubs */ \
V(LoadField) \
V(StoreField) \
V(LoadConstant) \
V(StringLength)
// List of code stubs only used on ARM 32 bits platforms.
#if V8_TARGET_ARCH_ARM
#define CODE_STUB_LIST_ARM(V) \
V(GetProperty) \
V(SetProperty) \
V(InvokeBuiltin) \
V(DirectCEntry)
#else
#define CODE_STUB_LIST_ARM(V)
#endif
// List of code stubs only used on ARM 64 bits platforms.
#if V8_TARGET_ARCH_ARM64
#define CODE_STUB_LIST_ARM64(V) \
V(GetProperty) \
V(SetProperty) \
V(InvokeBuiltin) \
V(DirectCEntry) \
V(StoreRegistersState) \
V(RestoreRegistersState)
#else
#define CODE_STUB_LIST_ARM64(V)
#endif
// List of code stubs only used on MIPS platforms.
#if V8_TARGET_ARCH_MIPS
#define CODE_STUB_LIST_MIPS(V) \
V(RegExpCEntry) \
V(DirectCEntry) \
V(StoreRegistersState) \
V(RestoreRegistersState)
#elif V8_TARGET_ARCH_MIPS64
#define CODE_STUB_LIST_MIPS(V) \
V(RegExpCEntry) \
V(DirectCEntry) \
V(StoreRegistersState) \
V(RestoreRegistersState)
#else
#define CODE_STUB_LIST_MIPS(V)
#endif
// Combined list of code stubs.
#define CODE_STUB_LIST(V) \
CODE_STUB_LIST_ALL_PLATFORMS(V) \
CODE_STUB_LIST_ARM(V) \
CODE_STUB_LIST_ARM64(V) \
CODE_STUB_LIST_MIPS(V)
// Stub is base classes of all stubs.
class CodeStub BASE_EMBEDDED {
public:
enum Major {
UninitializedMajorKey = 0,
#define DEF_ENUM(name) name,
CODE_STUB_LIST(DEF_ENUM)
#undef DEF_ENUM
NoCache, // marker for stubs that do custom caching
NUMBER_OF_IDS
};
// Retrieve the code for the stub. Generate the code if needed.
Handle<Code> GetCode();
// Retrieve the code for the stub, make and return a copy of the code.
Handle<Code> GetCodeCopy(const Code::FindAndReplacePattern& pattern);
static Major MajorKeyFromKey(uint32_t key) {
return static_cast<Major>(MajorKeyBits::decode(key));
}
static int MinorKeyFromKey(uint32_t key) {
return MinorKeyBits::decode(key);
}
// Gets the major key from a code object that is a code stub or binary op IC.
static Major GetMajorKey(Code* code_stub) {
return MajorKeyFromKey(code_stub->stub_key());
}
static uint32_t NoCacheKey() { return MajorKeyBits::encode(NoCache); }
static const char* MajorName(Major major_key, bool allow_unknown_keys);
explicit CodeStub(Isolate* isolate) : isolate_(isolate) { }
virtual ~CodeStub() {}
static void GenerateStubsAheadOfTime(Isolate* isolate);
static void GenerateFPStubs(Isolate* isolate);
// Some stubs put untagged junk on the stack that cannot be scanned by the
// GC. This means that we must be statically sure that no GC can occur while
// they are running. If that is the case they should override this to return
// true, which will cause an assertion if we try to call something that can
// GC or if we try to put a stack frame on top of the junk, which would not
// result in a traversable stack.
virtual bool SometimesSetsUpAFrame() { return true; }
// Lookup the code in the (possibly custom) cache.
bool FindCodeInCache(Code** code_out);
// Returns information for computing the number key.
virtual Major MajorKey() const = 0;
virtual int MinorKey() const = 0;
virtual InlineCacheState GetICState() const { return UNINITIALIZED; }
virtual ExtraICState GetExtraICState() const { return kNoExtraICState; }
virtual Code::StubType GetStubType() {
return Code::NORMAL;
}
friend OStream& operator<<(OStream& os, const CodeStub& s) {
s.PrintName(os);
return os;
}
Isolate* isolate() const { return isolate_; }
protected:
// Generates the assembler code for the stub.
virtual Handle<Code> GenerateCode() = 0;
// Returns whether the code generated for this stub needs to be allocated as
// a fixed (non-moveable) code object.
virtual bool NeedsImmovableCode() { return false; }
virtual void PrintName(OStream& os) const; // NOLINT
virtual void PrintBaseName(OStream& os) const; // NOLINT
virtual void PrintState(OStream& os) const { ; } // NOLINT
// Computes the key based on major and minor.
uint32_t GetKey() {
DCHECK(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
return MinorKeyBits::encode(MinorKey()) | MajorKeyBits::encode(MajorKey());
}
private:
// Perform bookkeeping required after code generation when stub code is
// initially generated.
void RecordCodeGeneration(Handle<Code> code);
// Finish the code object after it has been generated.
virtual void FinishCode(Handle<Code> code) { }
// Activate newly generated stub. Is called after
// registering stub in the stub cache.
virtual void Activate(Code* code) { }
// BinaryOpStub needs to override this.
virtual Code::Kind GetCodeKind() const;
// Add the code to a specialized cache, specific to an individual
// stub type. Please note, this method must add the code object to a
// roots object, otherwise we will remove the code during GC.
virtual void AddToSpecialCache(Handle<Code> new_object) { }
// Find code in a specialized cache, work is delegated to the specific stub.
virtual bool FindCodeInSpecialCache(Code** code_out) {
return false;
}
// If a stub uses a special cache override this.
virtual bool UseSpecialCache() { return false; }
STATIC_ASSERT(NUMBER_OF_IDS < (1 << kStubMajorKeyBits));
class MajorKeyBits: public BitField<uint32_t, 0, kStubMajorKeyBits> {};
class MinorKeyBits: public BitField<uint32_t,
kStubMajorKeyBits, kStubMinorKeyBits> {}; // NOLINT
friend class BreakPointIterator;
Isolate* isolate_;
};
class PlatformCodeStub : public CodeStub {
public:
explicit PlatformCodeStub(Isolate* isolate) : CodeStub(isolate) { }
// Retrieve the code for the stub. Generate the code if needed.
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual Code::Kind GetCodeKind() const { return Code::STUB; }
protected:
// Generates the assembler code for the stub.
virtual void Generate(MacroAssembler* masm) = 0;
};
enum StubFunctionMode { NOT_JS_FUNCTION_STUB_MODE, JS_FUNCTION_STUB_MODE };
enum HandlerArgumentsMode { DONT_PASS_ARGUMENTS, PASS_ARGUMENTS };
class PlatformInterfaceDescriptor;
class InterfaceDescriptor {
public:
bool IsInitialized() const { return register_param_count_ >= 0; }
int GetEnvironmentLength() const { return register_param_count_; }
int GetRegisterParameterCount() const { return register_param_count_; }
Register GetParameterRegister(int index) const {
return register_params_[index];
}
Representation GetParameterRepresentation(int index) const {
DCHECK(index < register_param_count_);
if (register_param_representations_.get() == NULL) {
return Representation::Tagged();
}
return register_param_representations_[index];
}
// "Environment" versions of parameter functions. The first register
// parameter (context) is not included.
int GetEnvironmentParameterCount() const {
return GetEnvironmentLength() - 1;
}
Register GetEnvironmentParameterRegister(int index) const {
return GetParameterRegister(index + 1);
}
Representation GetEnvironmentParameterRepresentation(int index) const {
return GetParameterRepresentation(index + 1);
}
// Some platforms have extra information to associate with the descriptor.
PlatformInterfaceDescriptor* platform_specific_descriptor() const {
return platform_specific_descriptor_;
}
static const Register ContextRegister();
protected:
InterfaceDescriptor();
virtual ~InterfaceDescriptor() {}
void Initialize(int register_parameter_count, Register* registers,
Representation* register_param_representations,
PlatformInterfaceDescriptor* platform_descriptor = NULL);
private:
int register_param_count_;
// The Register params are allocated dynamically by the
// InterfaceDescriptor, and freed on destruction. This is because static
// arrays of Registers cause creation of runtime static initializers
// which we don't want.
SmartArrayPointer<Register> register_params_;
// Specifies Representations for the stub's parameter. Points to an array of
// Representations of the same length of the numbers of parameters to the
// stub, or if NULL (the default value), Representation of each parameter
// assumed to be Tagged().
SmartArrayPointer<Representation> register_param_representations_;
PlatformInterfaceDescriptor* platform_specific_descriptor_;
DISALLOW_COPY_AND_ASSIGN(InterfaceDescriptor);
};
class CodeStubInterfaceDescriptor: public InterfaceDescriptor {
public:
CodeStubInterfaceDescriptor();
void Initialize(CodeStub::Major major, int register_parameter_count,
Register* registers, Address deoptimization_handler = NULL,
Representation* register_param_representations = NULL,
int hint_stack_parameter_count = -1,
StubFunctionMode function_mode = NOT_JS_FUNCTION_STUB_MODE);
void Initialize(CodeStub::Major major, int register_parameter_count,
Register* registers, Register stack_parameter_count,
Address deoptimization_handler = NULL,
Representation* register_param_representations = NULL,
int hint_stack_parameter_count = -1,
StubFunctionMode function_mode = NOT_JS_FUNCTION_STUB_MODE,
HandlerArgumentsMode handler_mode = DONT_PASS_ARGUMENTS);
void SetMissHandler(ExternalReference handler) {
miss_handler_ = handler;
has_miss_handler_ = true;
// Our miss handler infrastructure doesn't currently support
// variable stack parameter counts.
DCHECK(!stack_parameter_count_.is_valid());
}
ExternalReference miss_handler() const {
DCHECK(has_miss_handler_);
return miss_handler_;
}
bool has_miss_handler() const {
return has_miss_handler_;
}
bool IsEnvironmentParameterCountRegister(int index) const {
return GetEnvironmentParameterRegister(index).is(stack_parameter_count_);
}
int GetHandlerParameterCount() const {
int params = GetEnvironmentParameterCount();
if (handler_arguments_mode_ == PASS_ARGUMENTS) {
params += 1;
}
return params;
}
int hint_stack_parameter_count() const { return hint_stack_parameter_count_; }
Register stack_parameter_count() const { return stack_parameter_count_; }
StubFunctionMode function_mode() const { return function_mode_; }
Address deoptimization_handler() const { return deoptimization_handler_; }
CodeStub::Major MajorKey() const { return major_; }
private:
Register stack_parameter_count_;
// If hint_stack_parameter_count_ > 0, the code stub can optimize the
// return sequence. Default value is -1, which means it is ignored.
int hint_stack_parameter_count_;
StubFunctionMode function_mode_;
Address deoptimization_handler_;
HandlerArgumentsMode handler_arguments_mode_;
ExternalReference miss_handler_;
bool has_miss_handler_;
CodeStub::Major major_;
};
class CallInterfaceDescriptor: public InterfaceDescriptor {
public:
CallInterfaceDescriptor() { }
// A copy of the passed in registers and param_representations is made
// and owned by the CallInterfaceDescriptor.
// TODO(mvstanton): Instead of taking parallel arrays register and
// param_representations, how about a struct that puts the representation
// and register side by side (eg, RegRep(r1, Representation::Tagged()).
// The same should go for the CodeStubInterfaceDescriptor class.
void Initialize(int register_parameter_count, Register* registers,
Representation* param_representations,
PlatformInterfaceDescriptor* platform_descriptor = NULL);
};
class HydrogenCodeStub : public CodeStub {
public:
enum InitializationState {
UNINITIALIZED,
INITIALIZED
};
explicit HydrogenCodeStub(Isolate* isolate,
InitializationState state = INITIALIZED)
: CodeStub(isolate) {
is_uninitialized_ = (state == UNINITIALIZED);
}
virtual Code::Kind GetCodeKind() const { return Code::STUB; }
CodeStubInterfaceDescriptor* GetInterfaceDescriptor() {
return isolate()->code_stub_interface_descriptor(MajorKey());
}
bool IsUninitialized() { return is_uninitialized_; }
template<class SubClass>
static Handle<Code> GetUninitialized(Isolate* isolate) {
SubClass::GenerateAheadOfTime(isolate);
return SubClass().GetCode(isolate);
}
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) = 0;
// Retrieve the code for the stub. Generate the code if needed.
virtual Handle<Code> GenerateCode() = 0;
virtual int NotMissMinorKey() const = 0;
Handle<Code> GenerateLightweightMissCode();
template<class StateType>
void TraceTransition(StateType from, StateType to);
private:
class MinorKeyBits: public BitField<int, 0, kStubMinorKeyBits - 1> {};
class IsMissBits: public BitField<bool, kStubMinorKeyBits - 1, 1> {};
void GenerateLightweightMiss(MacroAssembler* masm);
virtual int MinorKey() const {
return IsMissBits::encode(is_uninitialized_) |
MinorKeyBits::encode(NotMissMinorKey());
}
bool is_uninitialized_;
};
// Helper interface to prepare to/restore after making runtime calls.
class RuntimeCallHelper {
public:
virtual ~RuntimeCallHelper() {}
virtual void BeforeCall(MacroAssembler* masm) const = 0;
virtual void AfterCall(MacroAssembler* masm) const = 0;
protected:
RuntimeCallHelper() {}
private:
DISALLOW_COPY_AND_ASSIGN(RuntimeCallHelper);
};
} } // namespace v8::internal
#if V8_TARGET_ARCH_IA32
#include "src/ia32/code-stubs-ia32.h"
#elif V8_TARGET_ARCH_X64
#include "src/x64/code-stubs-x64.h"
#elif V8_TARGET_ARCH_ARM64
#include "src/arm64/code-stubs-arm64.h"
#elif V8_TARGET_ARCH_ARM
#include "src/arm/code-stubs-arm.h"
#elif V8_TARGET_ARCH_MIPS
#include "src/mips/code-stubs-mips.h"
#elif V8_TARGET_ARCH_MIPS64
#include "src/mips64/code-stubs-mips64.h"
#elif V8_TARGET_ARCH_X87
#include "src/x87/code-stubs-x87.h"
#else
#error Unsupported target architecture.
#endif
namespace v8 {
namespace internal {
// RuntimeCallHelper implementation used in stubs: enters/leaves a
// newly created internal frame before/after the runtime call.
class StubRuntimeCallHelper : public RuntimeCallHelper {
public:
StubRuntimeCallHelper() {}
virtual void BeforeCall(MacroAssembler* masm) const;
virtual void AfterCall(MacroAssembler* masm) const;
};
// Trivial RuntimeCallHelper implementation.
class NopRuntimeCallHelper : public RuntimeCallHelper {
public:
NopRuntimeCallHelper() {}
virtual void BeforeCall(MacroAssembler* masm) const {}
virtual void AfterCall(MacroAssembler* masm) const {}
};
class ToNumberStub: public HydrogenCodeStub {
public:
explicit ToNumberStub(Isolate* isolate) : HydrogenCodeStub(isolate) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate) {
ToNumberStub stub(isolate);
stub.InitializeInterfaceDescriptor(
isolate->code_stub_interface_descriptor(CodeStub::ToNumber));
}
private:
Major MajorKey() const { return ToNumber; }
int NotMissMinorKey() const { return 0; }
};
class NumberToStringStub V8_FINAL : public HydrogenCodeStub {
public:
explicit NumberToStringStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
static const int kNumber = 0;
private:
virtual Major MajorKey() const V8_OVERRIDE { return NumberToString; }
virtual int NotMissMinorKey() const V8_OVERRIDE { return 0; }
};
class FastNewClosureStub : public HydrogenCodeStub {
public:
FastNewClosureStub(Isolate* isolate,
StrictMode strict_mode,
bool is_generator)
: HydrogenCodeStub(isolate),
strict_mode_(strict_mode),
is_generator_(is_generator) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
StrictMode strict_mode() const { return strict_mode_; }
bool is_generator() const { return is_generator_; }
private:
class StrictModeBits: public BitField<bool, 0, 1> {};
class IsGeneratorBits: public BitField<bool, 1, 1> {};
Major MajorKey() const { return FastNewClosure; }
int NotMissMinorKey() const {
return StrictModeBits::encode(strict_mode_ == STRICT) |
IsGeneratorBits::encode(is_generator_);
}
StrictMode strict_mode_;
bool is_generator_;
};
class FastNewContextStub V8_FINAL : public HydrogenCodeStub {
public:
static const int kMaximumSlots = 64;
FastNewContextStub(Isolate* isolate, int slots)
: HydrogenCodeStub(isolate), slots_(slots) {
DCHECK(slots_ > 0 && slots_ <= kMaximumSlots);
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
int slots() const { return slots_; }
virtual Major MajorKey() const V8_OVERRIDE { return FastNewContext; }
virtual int NotMissMinorKey() const V8_OVERRIDE { return slots_; }
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
static const int kFunction = 0;
private:
int slots_;
};
class FastCloneShallowArrayStub : public HydrogenCodeStub {
public:
FastCloneShallowArrayStub(Isolate* isolate,
AllocationSiteMode allocation_site_mode)
: HydrogenCodeStub(isolate),
allocation_site_mode_(allocation_site_mode) {}
AllocationSiteMode allocation_site_mode() const {
return allocation_site_mode_;
}
virtual Handle<Code> GenerateCode();
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
private:
AllocationSiteMode allocation_site_mode_;
class AllocationSiteModeBits: public BitField<AllocationSiteMode, 0, 1> {};
// Ensure data fits within available bits.
Major MajorKey() const { return FastCloneShallowArray; }
int NotMissMinorKey() const {
return AllocationSiteModeBits::encode(allocation_site_mode_);
}
};
class FastCloneShallowObjectStub : public HydrogenCodeStub {
public:
// Maximum number of properties in copied object.
static const int kMaximumClonedProperties = 6;
FastCloneShallowObjectStub(Isolate* isolate, int length)
: HydrogenCodeStub(isolate), length_(length) {
DCHECK_GE(length_, 0);
DCHECK_LE(length_, kMaximumClonedProperties);
}
int length() const { return length_; }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
int length_;
Major MajorKey() const { return FastCloneShallowObject; }
int NotMissMinorKey() const { return length_; }
DISALLOW_COPY_AND_ASSIGN(FastCloneShallowObjectStub);
};
class CreateAllocationSiteStub : public HydrogenCodeStub {
public:
explicit CreateAllocationSiteStub(Isolate* isolate)
: HydrogenCodeStub(isolate) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
static void GenerateAheadOfTime(Isolate* isolate);
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return CreateAllocationSite; }
int NotMissMinorKey() const { 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
};
InstanceofStub(Isolate* isolate, Flags flags)
: PlatformCodeStub(isolate), flags_(flags) { }
static Register left();
static Register right();
void Generate(MacroAssembler* masm);
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor);
private:
Major MajorKey() const { return Instanceof; }
int MinorKey() const { 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(OStream& os) const V8_OVERRIDE; // NOLINT
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(OStream& os) const V8_OVERRIDE; // NOLINT
virtual CodeStub::Major MajorKey() const { return ArrayConstructor; }
virtual int MinorKey() const { return argument_count_; }
ArgumentCountKey argument_count_;
};
class InternalArrayConstructorStub: public PlatformCodeStub {
public:
explicit InternalArrayConstructorStub(Isolate* isolate);
void Generate(MacroAssembler* masm);
private:
virtual CodeStub::Major MajorKey() const { return InternalArrayConstructor; }
virtual int MinorKey() const { return 0; }
void GenerateCase(MacroAssembler* masm, ElementsKind kind);
};
class MathPowStub: public PlatformCodeStub {
public:
enum ExponentType { INTEGER, DOUBLE, TAGGED, ON_STACK };
MathPowStub(Isolate* isolate, ExponentType exponent_type)
: PlatformCodeStub(isolate), exponent_type_(exponent_type) { }
virtual void Generate(MacroAssembler* masm);
private:
virtual CodeStub::Major MajorKey() const { return MathPow; }
virtual int MinorKey() const { return exponent_type_; }
ExponentType exponent_type_;
};
class CallICStub: public PlatformCodeStub {
public:
CallICStub(Isolate* isolate, const CallIC::State& state)
: PlatformCodeStub(isolate), state_(state) {}
bool CallAsMethod() const { return state_.CallAsMethod(); }
int arg_count() const { return state_.arg_count(); }
static int ExtractArgcFromMinorKey(int minor_key) {
CallIC::State state((ExtraICState) minor_key);
return state.arg_count();
}
virtual void Generate(MacroAssembler* masm);
virtual Code::Kind GetCodeKind() const V8_OVERRIDE {
return Code::CALL_IC;
}
virtual InlineCacheState GetICState() const V8_OVERRIDE { return DEFAULT; }
virtual ExtraICState GetExtraICState() const V8_FINAL V8_OVERRIDE {
return state_.GetExtraICState();
}
protected:
virtual int MinorKey() const { return GetExtraICState(); }
virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT
virtual CodeStub::Major MajorKey() const { return CallIC; }
// Code generation helpers.
void GenerateMiss(MacroAssembler* masm, IC::UtilityId id);
const CallIC::State state_;
};
class CallIC_ArrayStub: public CallICStub {
public:
CallIC_ArrayStub(Isolate* isolate, const CallIC::State& state_in)
: CallICStub(isolate, state_in) {}
virtual void Generate(MacroAssembler* masm);
virtual InlineCacheState GetICState() const V8_FINAL V8_OVERRIDE {
return MONOMORPHIC;
}
protected:
virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT
virtual CodeStub::Major MajorKey() const { return CallIC_Array; }
};
// TODO(verwaest): Translate to hydrogen code stub.
class FunctionPrototypeStub : public PlatformCodeStub {
public:
explicit FunctionPrototypeStub(Isolate* isolate)
: PlatformCodeStub(isolate) {}
virtual void Generate(MacroAssembler* masm);
virtual Code::Kind GetCodeKind() const { return Code::HANDLER; }
private:
virtual CodeStub::Major MajorKey() const { return FunctionPrototype; }
virtual int MinorKey() const { return 0; }
};
class HandlerStub : public HydrogenCodeStub {
public:
virtual Code::Kind GetCodeKind() const { return Code::HANDLER; }
virtual ExtraICState GetExtraICState() const { return kind(); }
virtual InlineCacheState GetICState() const { return MONOMORPHIC; }
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
protected:
explicit HandlerStub(Isolate* isolate)
: HydrogenCodeStub(isolate), bit_field_(0) {}
virtual int NotMissMinorKey() const { return bit_field_; }
virtual Code::Kind kind() const = 0;
int bit_field_;
};
class LoadFieldStub: public HandlerStub {
public:
LoadFieldStub(Isolate* isolate, FieldIndex index)
: HandlerStub(isolate), index_(index) {
int property_index_key = index_.GetFieldAccessStubKey();
bit_field_ = EncodedLoadFieldByIndexBits::encode(property_index_key);
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
FieldIndex index() const { return index_; }
protected:
explicit LoadFieldStub(Isolate* isolate);
virtual Code::Kind kind() const { return Code::LOAD_IC; }
virtual Code::StubType GetStubType() { return Code::FAST; }
private:
class EncodedLoadFieldByIndexBits : public BitField<int, 0, 13> {};
virtual CodeStub::Major MajorKey() const { return LoadField; }
FieldIndex index_;
};
class LoadConstantStub : public HandlerStub {
public:
LoadConstantStub(Isolate* isolate, int descriptor) : HandlerStub(isolate) {
bit_field_ = descriptor;
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
int descriptor() const { return bit_field_; }
protected:
explicit LoadConstantStub(Isolate* isolate);
virtual Code::Kind kind() const { return Code::LOAD_IC; }
virtual Code::StubType GetStubType() { return Code::FAST; }
private:
virtual CodeStub::Major MajorKey() const { return LoadConstant; }
};
class StringLengthStub: public HandlerStub {
public:
explicit StringLengthStub(Isolate* isolate) : HandlerStub(isolate) {}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
protected:
virtual Code::Kind kind() const { return Code::LOAD_IC; }
virtual Code::StubType GetStubType() { return Code::FAST; }
private:
virtual CodeStub::Major MajorKey() const { return StringLength; }
};
class StoreFieldStub : public HandlerStub {
public:
StoreFieldStub(Isolate* isolate, FieldIndex index,
Representation representation)
: HandlerStub(isolate), index_(index), representation_(representation) {
int property_index_key = index_.GetFieldAccessStubKey();
bit_field_ = EncodedStoreFieldByIndexBits::encode(property_index_key) |
RepresentationBits::encode(
PropertyDetails::EncodeRepresentation(representation));
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
FieldIndex index() const { return index_; }
Representation representation() { return representation_; }
static void InstallDescriptors(Isolate* isolate);
protected:
explicit StoreFieldStub(Isolate* isolate);
virtual Code::Kind kind() const { return Code::STORE_IC; }
virtual Code::StubType GetStubType() { return Code::FAST; }
private:
class EncodedStoreFieldByIndexBits : public BitField<int, 0, 13> {};
class RepresentationBits : public BitField<int, 13, 4> {};
virtual CodeStub::Major MajorKey() const { return StoreField; }
FieldIndex index_;
Representation representation_;
};
class StoreGlobalStub : public HandlerStub {
public:
StoreGlobalStub(Isolate* isolate, bool is_constant, bool check_global)
: HandlerStub(isolate) {
bit_field_ = IsConstantBits::encode(is_constant) |
CheckGlobalBits::encode(check_global);
}
static Handle<HeapObject> global_placeholder(Isolate* isolate) {
return isolate->factory()->uninitialized_value();
}
Handle<Code> GetCodeCopyFromTemplate(Handle<GlobalObject> global,
Handle<PropertyCell> cell) {
if (check_global()) {
Code::FindAndReplacePattern pattern;
pattern.Add(Handle<Map>(global_placeholder(isolate())->map()), global);
pattern.Add(isolate()->factory()->meta_map(), Handle<Map>(global->map()));
pattern.Add(isolate()->factory()->global_property_cell_map(), cell);
return CodeStub::GetCodeCopy(pattern);
} else {
Code::FindAndReplacePattern pattern;
pattern.Add(isolate()->factory()->global_property_cell_map(), cell);
return CodeStub::GetCodeCopy(pattern);
}
}
virtual Code::Kind kind() const { return Code::STORE_IC; }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
bool is_constant() const {
return IsConstantBits::decode(bit_field_);
}
bool check_global() const {
return CheckGlobalBits::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() const { return StoreGlobal; }
class IsConstantBits: public BitField<bool, 0, 1> {};
class RepresentationBits: public BitField<Representation::Kind, 1, 8> {};
class CheckGlobalBits: public BitField<bool, 9, 1> {};
DISALLOW_COPY_AND_ASSIGN(StoreGlobalStub);
};
class CallApiFunctionStub : public PlatformCodeStub {
public:
CallApiFunctionStub(Isolate* isolate,
bool is_store,
bool call_data_undefined,
int argc) : PlatformCodeStub(isolate) {
bit_field_ =
IsStoreBits::encode(is_store) |
CallDataUndefinedBits::encode(call_data_undefined) |
ArgumentBits::encode(argc);
DCHECK(!is_store || argc == 1);
}
private:
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
virtual Major MajorKey() const V8_OVERRIDE { return CallApiFunction; }
virtual int MinorKey() const 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:
explicit CallApiGetterStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
private:
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
virtual Major MajorKey() const V8_OVERRIDE { return CallApiGetter; }
virtual int MinorKey() const V8_OVERRIDE { return 0; }
DISALLOW_COPY_AND_ASSIGN(CallApiGetterStub);
};
class BinaryOpICStub : public HydrogenCodeStub {
public:
BinaryOpICStub(Isolate* isolate, Token::Value op,
OverwriteMode mode = NO_OVERWRITE)
: HydrogenCodeStub(isolate, UNINITIALIZED), state_(isolate, op, mode) {}
explicit BinaryOpICStub(Isolate* isolate, const BinaryOpIC::State& state)
: HydrogenCodeStub(isolate), state_(state) {}
static void GenerateAheadOfTime(Isolate* isolate);
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
virtual Code::Kind GetCodeKind() const V8_OVERRIDE {
return Code::BINARY_OP_IC;
}
virtual InlineCacheState GetICState() const V8_FINAL V8_OVERRIDE {
return state_.GetICState();
}
virtual ExtraICState GetExtraICState() const V8_FINAL V8_OVERRIDE {
return state_.GetExtraICState();
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
const BinaryOpIC::State& state() const { return state_; }
virtual void PrintState(OStream& os) const V8_FINAL V8_OVERRIDE; // NOLINT
virtual Major MajorKey() const V8_OVERRIDE { return BinaryOpIC; }
virtual int NotMissMinorKey() const 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);
};
// 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:
BinaryOpICWithAllocationSiteStub(Isolate* isolate,
const BinaryOpIC::State& state)
: PlatformCodeStub(isolate), state_(state) {}
static void GenerateAheadOfTime(Isolate* isolate);
Handle<Code> GetCodeCopyFromTemplate(Handle<AllocationSite> allocation_site) {
Code::FindAndReplacePattern pattern;
pattern.Add(isolate()->factory()->undefined_map(), allocation_site);
return CodeStub::GetCodeCopy(pattern);
}
virtual Code::Kind GetCodeKind() const V8_OVERRIDE {
return Code::BINARY_OP_IC;
}
virtual InlineCacheState GetICState() const V8_OVERRIDE {
return state_.GetICState();
}
virtual ExtraICState GetExtraICState() const V8_OVERRIDE {
return state_.GetExtraICState();
}
virtual void Generate(MacroAssembler* masm) V8_OVERRIDE;
virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT
virtual Major MajorKey() const V8_OVERRIDE {
return BinaryOpICWithAllocationSite;
}
virtual int MinorKey() const 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(Isolate* isolate,
Token::Value op,
OverwriteMode mode)
: BinaryOpICStub(isolate, op, mode) {}
BinaryOpWithAllocationSiteStub(Isolate* isolate,
const BinaryOpIC::State& state)
: BinaryOpICStub(isolate, state) {}
virtual void InitializeInterfaceDescriptor(
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() V8_OVERRIDE;
virtual Major MajorKey() const 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(Isolate* isolate,
StringAddFlags flags,
PretenureFlag pretenure_flag)
: HydrogenCodeStub(isolate),
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 Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
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() const V8_OVERRIDE { return StringAdd; }
virtual int NotMissMinorKey() const V8_OVERRIDE { return bit_field_; }
virtual void PrintBaseName(OStream& os) const V8_OVERRIDE; // NOLINT
DISALLOW_COPY_AND_ASSIGN(StringAddStub);
};
class ICCompareStub: public PlatformCodeStub {
public:
ICCompareStub(Isolate* isolate,
Token::Value op,
CompareIC::State left,
CompareIC::State right,
CompareIC::State handler)
: PlatformCodeStub(isolate),
op_(op),
left_(left),
right_(right),
state_(handler) {
DCHECK(Token::IsCompareOp(op));
}
virtual void Generate(MacroAssembler* masm);
void set_known_map(Handle<Map> map) { known_map_ = map; }
static void DecodeKey(uint32_t stub_key, CompareIC::State* left_state,
CompareIC::State* right_state,
CompareIC::State* handler_state, Token::Value* op);
virtual InlineCacheState GetICState() const;
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 CodeStub::Major MajorKey() const { return CompareIC; }
virtual int MinorKey() const;
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);
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);
CompareNilICStub(Isolate* isolate, NilValue nil)
: HydrogenCodeStub(isolate), nil_value_(nil) { }
CompareNilICStub(Isolate* isolate,
ExtraICState ic_state,
InitializationState init_state = INITIALIZED)
: HydrogenCodeStub(isolate, init_state),
nil_value_(NilValueField::decode(ic_state)),
state_(State(TypesField::decode(ic_state))) {
}
static Handle<Code> GetUninitialized(Isolate* isolate,
NilValue nil) {
return CompareNilICStub(isolate, nil, UNINITIALIZED).GetCode();
}
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate) {
CompareNilICStub compare_stub(isolate, kNullValue, UNINITIALIZED);
compare_stub.InitializeInterfaceDescriptor(
isolate->code_stub_interface_descriptor(CodeStub::CompareNilIC));
}
virtual InlineCacheState GetICState() const {
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() V8_OVERRIDE;
virtual ExtraICState GetExtraICState() const {
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(OStream& os) const V8_OVERRIDE; // NOLINT
virtual void PrintBaseName(OStream& os) const V8_OVERRIDE; // NOLINT
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) { }
};
friend OStream& operator<<(OStream& os, const State& s);
CompareNilICStub(Isolate* isolate,
NilValue nil,
InitializationState init_state)
: HydrogenCodeStub(isolate, 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() const { return CompareNilIC; }
virtual int NotMissMinorKey() const { return GetExtraICState(); }
NilValue nil_value_;
State state_;
DISALLOW_COPY_AND_ASSIGN(CompareNilICStub);
};
OStream& operator<<(OStream& os, const CompareNilICStub::State& s);
class CEntryStub : public PlatformCodeStub {
public:
CEntryStub(Isolate* isolate,
int result_size,
SaveFPRegsMode save_doubles = kDontSaveFPRegs)
: PlatformCodeStub(isolate),
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);
private:
// Number of pointers/values returned.
const int result_size_;
SaveFPRegsMode save_doubles_;
Major MajorKey() const { return CEntry; }
int MinorKey() const;
bool NeedsImmovableCode();
};
class JSEntryStub : public PlatformCodeStub {
public:
explicit JSEntryStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
protected:
void GenerateBody(MacroAssembler* masm, bool is_construct);
private:
Major MajorKey() const { return JSEntry; }
int MinorKey() const { return 0; }
virtual void FinishCode(Handle<Code> code);
int handler_offset_;
};
class JSConstructEntryStub : public JSEntryStub {
public:
explicit JSConstructEntryStub(Isolate* isolate) : JSEntryStub(isolate) { }
void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
private:
int MinorKey() const { return 1; }
virtual void PrintName(OStream& os) const V8_OVERRIDE { // NOLINT
os << "JSConstructEntryStub";
}
};
class ArgumentsAccessStub: public PlatformCodeStub {
public:
enum Type {
READ_ELEMENT,
NEW_SLOPPY_FAST,
NEW_SLOPPY_SLOW,
NEW_STRICT
};
ArgumentsAccessStub(Isolate* isolate, Type type)
: PlatformCodeStub(isolate), type_(type) { }
private:
Type type_;
Major MajorKey() const { return ArgumentsAccess; }
int MinorKey() const { return type_; }
void Generate(MacroAssembler* masm);
void GenerateReadElement(MacroAssembler* masm);
void GenerateNewStrict(MacroAssembler* masm);
void GenerateNewSloppyFast(MacroAssembler* masm);
void GenerateNewSloppySlow(MacroAssembler* masm);
virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT
};
class RegExpExecStub: public PlatformCodeStub {
public:
explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
private:
Major MajorKey() const { return RegExpExec; }
int MinorKey() const { return 0; }
void Generate(MacroAssembler* masm);
};
class RegExpConstructResultStub V8_FINAL : public HydrogenCodeStub {
public:
explicit RegExpConstructResultStub(Isolate* isolate)
: HydrogenCodeStub(isolate) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
virtual Major MajorKey() const V8_OVERRIDE { return RegExpConstructResult; }
virtual int NotMissMinorKey() const 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(Isolate* isolate, int argc, CallFunctionFlags flags)
: PlatformCodeStub(isolate), argc_(argc), flags_(flags) {
DCHECK(argc <= Code::kMaxArguments);
}
void Generate(MacroAssembler* masm);
static int ExtractArgcFromMinorKey(int minor_key) {
return ArgcBits::decode(minor_key);
}
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor);
private:
int argc_;
CallFunctionFlags flags_;
virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT
// Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
class FlagBits: public BitField<CallFunctionFlags, 0, 2> {};
class ArgcBits : public BitField<unsigned, 2, Code::kArgumentsBits> {};
STATIC_ASSERT(Code::kArgumentsBits + 2 <= kStubMinorKeyBits);
Major MajorKey() const { return CallFunction; }
int MinorKey() const {
// Encode the parameters in a unique 32 bit value.
return FlagBits::encode(flags_) | ArgcBits::encode(argc_);
}
bool CallAsMethod() {
return flags_ == CALL_AS_METHOD || flags_ == WRAP_AND_CALL;
}
bool NeedsChecks() {
return flags_ != WRAP_AND_CALL;
}
};
class CallConstructStub: public PlatformCodeStub {
public:
CallConstructStub(Isolate* isolate, CallConstructorFlags flags)
: PlatformCodeStub(isolate), flags_(flags) {}
void Generate(MacroAssembler* masm);
virtual void FinishCode(Handle<Code> code) {
code->set_has_function_cache(RecordCallTarget());
}
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor);
private:
CallConstructorFlags flags_;
virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT
Major MajorKey() const { return CallConstruct; }
int MinorKey() const { return flags_; }
bool RecordCallTarget() const {
return (flags_ & RECORD_CONSTRUCTOR_TARGET) != 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) {
DCHECK(!result_.is(object_));
DCHECK(!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) {
DCHECK(!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 LoadDictionaryElementStub : public HydrogenCodeStub {
public:
explicit LoadDictionaryElementStub(Isolate* isolate)
: HydrogenCodeStub(isolate) {}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return LoadElement; }
int NotMissMinorKey() const { return DICTIONARY_ELEMENTS; }
DISALLOW_COPY_AND_ASSIGN(LoadDictionaryElementStub);
};
class LoadDictionaryElementPlatformStub : public PlatformCodeStub {
public:
explicit LoadDictionaryElementPlatformStub(Isolate* isolate)
: PlatformCodeStub(isolate) {}
void Generate(MacroAssembler* masm);
private:
Major MajorKey() const { return LoadElement; }
int MinorKey() const { return DICTIONARY_ELEMENTS; }
DISALLOW_COPY_AND_ASSIGN(LoadDictionaryElementPlatformStub);
};
class KeyedLoadGenericStub : public HydrogenCodeStub {
public:
explicit KeyedLoadGenericStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
static void InstallDescriptors(Isolate* isolate);
virtual Code::Kind GetCodeKind() const { return Code::KEYED_LOAD_IC; }
virtual InlineCacheState GetICState() const { return GENERIC; }
private:
Major MajorKey() const { return KeyedLoadGeneric; }
int NotMissMinorKey() const { return 0; }
DISALLOW_COPY_AND_ASSIGN(KeyedLoadGenericStub);
};
class DoubleToIStub : public PlatformCodeStub {
public:
DoubleToIStub(Isolate* isolate,
Register source,
Register destination,
int offset,
bool is_truncating,
bool skip_fastpath = false)
: PlatformCodeStub(isolate), bit_field_(0) {
bit_field_ = SourceRegisterBits::encode(source.code()) |
DestinationRegisterBits::encode(destination.code()) |
OffsetBits::encode(offset) |
IsTruncatingBits::encode(is_truncating) |
SkipFastPathBits::encode(skip_fastpath) |
SSE3Bits::encode(CpuFeatures::IsSupported(SSE3) ? 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; }
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 SSE3Bits:
public BitField<int, 2 * kBitsPerRegisterNumber + 5, 1> {}; // NOLINT
Major MajorKey() const { return DoubleToI; }
int MinorKey() const { return bit_field_; }
int bit_field_;
DISALLOW_COPY_AND_ASSIGN(DoubleToIStub);
};
class LoadFastElementStub : public HydrogenCodeStub {
public:
LoadFastElementStub(Isolate* isolate, bool is_js_array,
ElementsKind elements_kind)
: HydrogenCodeStub(isolate) {
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() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
class IsJSArrayBits: public BitField<bool, 8, 1> {};
uint32_t bit_field_;
Major MajorKey() const { return LoadElement; }
int NotMissMinorKey() const { return bit_field_; }
DISALLOW_COPY_AND_ASSIGN(LoadFastElementStub);
};
class StoreFastElementStub : public HydrogenCodeStub {
public:
StoreFastElementStub(Isolate* isolate, bool is_js_array,
ElementsKind elements_kind, KeyedAccessStoreMode mode)
: HydrogenCodeStub(isolate) {
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() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
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() const { return StoreElement; }
int NotMissMinorKey() const { return bit_field_; }
DISALLOW_COPY_AND_ASSIGN(StoreFastElementStub);
};
class TransitionElementsKindStub : public HydrogenCodeStub {
public:
TransitionElementsKindStub(Isolate* isolate,
ElementsKind from_kind,
ElementsKind to_kind,
bool is_js_array) : HydrogenCodeStub(isolate) {
bit_field_ = FromKindBits::encode(from_kind) |
ToKindBits::encode(to_kind) |
IsJSArrayBits::encode(is_js_array);
}
ElementsKind from_kind() const {
return FromKindBits::decode(bit_field_);
}
ElementsKind to_kind() const {
return ToKindBits::decode(bit_field_);
}
bool is_js_array() const {
return IsJSArrayBits::decode(bit_field_);
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
class FromKindBits: public BitField<ElementsKind, 8, 8> {};
class ToKindBits: public BitField<ElementsKind, 0, 8> {};
class IsJSArrayBits: public BitField<bool, 16, 1> {};
uint32_t bit_field_;
Major MajorKey() const { return TransitionElementsKind; }
int NotMissMinorKey() const { return bit_field_; }
DISALLOW_COPY_AND_ASSIGN(TransitionElementsKindStub);
};
class ArrayConstructorStubBase : public HydrogenCodeStub {
public:
ArrayConstructorStubBase(Isolate* isolate,
ElementsKind kind,
AllocationSiteOverrideMode override_mode)
: HydrogenCodeStub(isolate) {
// 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.
DCHECK(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:
OStream& BasePrintName(OStream& os, const char* name) const; // NOLINT
private:
int NotMissMinorKey() const { 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(
Isolate* isolate,
ElementsKind kind,
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
: ArrayConstructorStubBase(isolate, kind, override_mode) {
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return ArrayNoArgumentConstructor; }
virtual void PrintName(OStream& os) const V8_OVERRIDE { // NOLINT
BasePrintName(os, "ArrayNoArgumentConstructorStub");
}
DISALLOW_COPY_AND_ASSIGN(ArrayNoArgumentConstructorStub);
};
class ArraySingleArgumentConstructorStub : public ArrayConstructorStubBase {
public:
ArraySingleArgumentConstructorStub(
Isolate* isolate,
ElementsKind kind,
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
: ArrayConstructorStubBase(isolate, kind, override_mode) {
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return ArraySingleArgumentConstructor; }
virtual void PrintName(OStream& os) const { // NOLINT
BasePrintName(os, "ArraySingleArgumentConstructorStub");
}
DISALLOW_COPY_AND_ASSIGN(ArraySingleArgumentConstructorStub);
};
class ArrayNArgumentsConstructorStub : public ArrayConstructorStubBase {
public:
ArrayNArgumentsConstructorStub(
Isolate* isolate,
ElementsKind kind,
AllocationSiteOverrideMode override_mode = DONT_OVERRIDE)
: ArrayConstructorStubBase(isolate, kind, override_mode) {
}
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return ArrayNArgumentsConstructor; }
virtual void PrintName(OStream& os) const { // NOLINT
BasePrintName(os, "ArrayNArgumentsConstructorStub");
}
DISALLOW_COPY_AND_ASSIGN(ArrayNArgumentsConstructorStub);
};
class InternalArrayConstructorStubBase : public HydrogenCodeStub {
public:
InternalArrayConstructorStubBase(Isolate* isolate, ElementsKind kind)
: HydrogenCodeStub(isolate) {
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() const { return kind_; }
ElementsKind kind_;
DISALLOW_COPY_AND_ASSIGN(InternalArrayConstructorStubBase);
};
class InternalArrayNoArgumentConstructorStub : public
InternalArrayConstructorStubBase {
public:
InternalArrayNoArgumentConstructorStub(Isolate* isolate,
ElementsKind kind)
: InternalArrayConstructorStubBase(isolate, kind) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return InternalArrayNoArgumentConstructor; }
DISALLOW_COPY_AND_ASSIGN(InternalArrayNoArgumentConstructorStub);
};
class InternalArraySingleArgumentConstructorStub : public
InternalArrayConstructorStubBase {
public:
InternalArraySingleArgumentConstructorStub(Isolate* isolate,
ElementsKind kind)
: InternalArrayConstructorStubBase(isolate, kind) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return InternalArraySingleArgumentConstructor; }
DISALLOW_COPY_AND_ASSIGN(InternalArraySingleArgumentConstructorStub);
};
class InternalArrayNArgumentsConstructorStub : public
InternalArrayConstructorStubBase {
public:
InternalArrayNArgumentsConstructorStub(Isolate* isolate, ElementsKind kind)
: InternalArrayConstructorStubBase(isolate, kind) { }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
private:
Major MajorKey() const { return InternalArrayNArgumentsConstructor; }
DISALLOW_COPY_AND_ASSIGN(InternalArrayNArgumentsConstructorStub);
};
class StoreElementStub : public PlatformCodeStub {
public:
StoreElementStub(Isolate* isolate, bool is_js_array,
ElementsKind elements_kind, KeyedAccessStoreMode store_mode)
: PlatformCodeStub(isolate),
is_js_array_(is_js_array),
elements_kind_(elements_kind),
store_mode_(store_mode) {}
Major MajorKey() const { return StoreElement; }
int MinorKey() const {
return ElementsKindBits::encode(elements_kind_) |
IsJSArrayBits::encode(is_js_array_) |
StoreModeBits::encode(store_mode_);
}
void Generate(MacroAssembler* masm);
private:
class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
class StoreModeBits: public BitField<KeyedAccessStoreMode, 8, 4> {};
class IsJSArrayBits: public BitField<bool, 12, 1> {};
bool is_js_array_;
ElementsKind elements_kind_;
KeyedAccessStoreMode store_mode_;
DISALLOW_COPY_AND_ASSIGN(StoreElementStub);
};
class ToBooleanStub: public HydrogenCodeStub {
public:
enum Type {
UNDEFINED,
BOOLEAN,
NULL_TYPE,
SMI,
SPEC_OBJECT,
STRING,
SYMBOL,
HEAP_NUMBER,
NUMBER_OF_TYPES
};
enum ResultMode {
RESULT_AS_SMI, // For Smi(1) on truthy value, Smi(0) otherwise.
RESULT_AS_ODDBALL, // For {true} on truthy value, {false} otherwise.
RESULT_AS_INVERSE_ODDBALL // For {false} on truthy value, {true} otherwise.
};
// 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(); }
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); }
};
ToBooleanStub(Isolate* isolate, ResultMode mode, Types types = Types())
: HydrogenCodeStub(isolate), types_(types), mode_(mode) {}
ToBooleanStub(Isolate* isolate, ExtraICState state)
: HydrogenCodeStub(isolate),
types_(static_cast<byte>(state)),
mode_(RESULT_AS_SMI) {}
bool UpdateStatus(Handle<Object> object);
Types GetTypes() { return types_; }
ResultMode GetMode() { return mode_; }
virtual Handle<Code> GenerateCode() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
virtual Code::Kind GetCodeKind() const { return Code::TO_BOOLEAN_IC; }
virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT
virtual bool SometimesSetsUpAFrame() { return false; }
static void InstallDescriptors(Isolate* isolate) {
ToBooleanStub stub(isolate, RESULT_AS_SMI);
stub.InitializeInterfaceDescriptor(
isolate->code_stub_interface_descriptor(CodeStub::ToBoolean));
}
static Handle<Code> GetUninitialized(Isolate* isolate) {
return ToBooleanStub(isolate, UNINITIALIZED).GetCode();
}
virtual ExtraICState GetExtraICState() const { return types_.ToIntegral(); }
virtual InlineCacheState GetICState() const {
if (types_.IsEmpty()) {
return ::v8::internal::UNINITIALIZED;
} else {
return MONOMORPHIC;
}
}
private:
class TypesBits : public BitField<byte, 0, NUMBER_OF_TYPES> {};
class ResultModeBits : public BitField<ResultMode, NUMBER_OF_TYPES, 2> {};
Major MajorKey() const { return ToBoolean; }
int NotMissMinorKey() const {
return TypesBits::encode(types_.ToByte()) | ResultModeBits::encode(mode_);
}
ToBooleanStub(Isolate* isolate, InitializationState init_state)
: HydrogenCodeStub(isolate, init_state), mode_(RESULT_AS_SMI) {}
Types types_;
ResultMode mode_;
};
OStream& operator<<(OStream& os, const ToBooleanStub::Types& t);
class ElementsTransitionAndStoreStub : public HydrogenCodeStub {
public:
ElementsTransitionAndStoreStub(Isolate* isolate,
ElementsKind from_kind,
ElementsKind to_kind,
bool is_jsarray,
KeyedAccessStoreMode store_mode)
: HydrogenCodeStub(isolate),
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() V8_OVERRIDE;
virtual void InitializeInterfaceDescriptor(
CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE;
// Parameters accessed via CodeStubGraphBuilder::GetParameter()
enum ParameterIndices {
kValueIndex,
kMapIndex,
kKeyIndex,
kObjectIndex,
kParameterCount
};
static const Register ValueRegister() {
return KeyedStoreIC::ValueRegister();
}
static const Register MapRegister() { return KeyedStoreIC::MapRegister(); }
static const Register KeyRegister() { return KeyedStoreIC::NameRegister(); }
static const Register ObjectRegister() {
return KeyedStoreIC::ReceiverRegister();
}
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() const { return ElementsTransitionAndStore; }
int NotMissMinorKey() const {
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:
explicit StoreArrayLiteralElementStub(Isolate* isolate)
: PlatformCodeStub(isolate) { }
private:
Major MajorKey() const { return StoreArrayLiteralElement; }
int MinorKey() const { return 0; }
void Generate(MacroAssembler* masm);
DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
};
class StubFailureTrampolineStub : public PlatformCodeStub {
public:
StubFailureTrampolineStub(Isolate* isolate, StubFunctionMode function_mode)
: PlatformCodeStub(isolate),
function_mode_(function_mode) {}
static void GenerateAheadOfTime(Isolate* isolate);
private:
class FunctionModeField: public BitField<StubFunctionMode, 0, 1> {};
Major MajorKey() const { return StubFailureTrampoline; }
int MinorKey() const { return FunctionModeField::encode(function_mode_); }
void Generate(MacroAssembler* masm);
StubFunctionMode function_mode_;
DISALLOW_COPY_AND_ASSIGN(StubFailureTrampolineStub);
};
class ProfileEntryHookStub : public PlatformCodeStub {
public:
explicit ProfileEntryHookStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
// 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() const { return ProfileEntryHook; }
int MinorKey() const { 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_