| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_HYDROGEN_INSTRUCTIONS_H_ |
| #define V8_HYDROGEN_INSTRUCTIONS_H_ |
| |
| #include "v8.h" |
| |
| #include "allocation.h" |
| #include "code-stubs.h" |
| #include "data-flow.h" |
| #include "deoptimizer.h" |
| #include "small-pointer-list.h" |
| #include "string-stream.h" |
| #include "unique.h" |
| #include "v8conversions.h" |
| #include "v8utils.h" |
| #include "zone.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declarations. |
| class HBasicBlock; |
| class HEnvironment; |
| class HInferRepresentationPhase; |
| class HInstruction; |
| class HLoopInformation; |
| class HStoreNamedField; |
| class HValue; |
| class LInstruction; |
| class LChunkBuilder; |
| |
| #define HYDROGEN_ABSTRACT_INSTRUCTION_LIST(V) \ |
| V(ArithmeticBinaryOperation) \ |
| V(BinaryOperation) \ |
| V(BitwiseBinaryOperation) \ |
| V(ControlInstruction) \ |
| V(Instruction) \ |
| |
| |
| #define HYDROGEN_CONCRETE_INSTRUCTION_LIST(V) \ |
| V(AbnormalExit) \ |
| V(AccessArgumentsAt) \ |
| V(Add) \ |
| V(Allocate) \ |
| V(ApplyArguments) \ |
| V(ArgumentsElements) \ |
| V(ArgumentsLength) \ |
| V(ArgumentsObject) \ |
| V(Bitwise) \ |
| V(BlockEntry) \ |
| V(BoundsCheck) \ |
| V(BoundsCheckBaseIndexInformation) \ |
| V(Branch) \ |
| V(CallConstantFunction) \ |
| V(CallFunction) \ |
| V(CallGlobal) \ |
| V(CallKeyed) \ |
| V(CallKnownGlobal) \ |
| V(CallNamed) \ |
| V(CallNew) \ |
| V(CallNewArray) \ |
| V(CallRuntime) \ |
| V(CallStub) \ |
| V(CapturedObject) \ |
| V(Change) \ |
| V(CheckHeapObject) \ |
| V(CheckInstanceType) \ |
| V(CheckMaps) \ |
| V(CheckMapValue) \ |
| V(CheckSmi) \ |
| V(CheckValue) \ |
| V(ClampToUint8) \ |
| V(ClassOfTestAndBranch) \ |
| V(CompareNumericAndBranch) \ |
| V(CompareHoleAndBranch) \ |
| V(CompareGeneric) \ |
| V(CompareMinusZeroAndBranch) \ |
| V(CompareObjectEqAndBranch) \ |
| V(CompareMap) \ |
| V(Constant) \ |
| V(Context) \ |
| V(DateField) \ |
| V(DebugBreak) \ |
| V(DeclareGlobals) \ |
| V(Deoptimize) \ |
| V(Div) \ |
| V(DummyUse) \ |
| V(ElementsKind) \ |
| V(EnterInlined) \ |
| V(EnvironmentMarker) \ |
| V(ForceRepresentation) \ |
| V(ForInCacheArray) \ |
| V(ForInPrepareMap) \ |
| V(FunctionLiteral) \ |
| V(GetCachedArrayIndex) \ |
| V(GlobalObject) \ |
| V(GlobalReceiver) \ |
| V(Goto) \ |
| V(HasCachedArrayIndexAndBranch) \ |
| V(HasInstanceTypeAndBranch) \ |
| V(InnerAllocatedObject) \ |
| V(InstanceOf) \ |
| V(InstanceOfKnownGlobal) \ |
| V(InvokeFunction) \ |
| V(IsConstructCallAndBranch) \ |
| V(IsObjectAndBranch) \ |
| V(IsStringAndBranch) \ |
| V(IsSmiAndBranch) \ |
| V(IsUndetectableAndBranch) \ |
| V(LeaveInlined) \ |
| V(LoadContextSlot) \ |
| V(LoadExternalArrayPointer) \ |
| V(LoadFieldByIndex) \ |
| V(LoadFunctionPrototype) \ |
| V(LoadGlobalCell) \ |
| V(LoadGlobalGeneric) \ |
| V(LoadKeyed) \ |
| V(LoadKeyedGeneric) \ |
| V(LoadNamedField) \ |
| V(LoadNamedGeneric) \ |
| V(LoadRoot) \ |
| V(MapEnumLength) \ |
| V(MathFloorOfDiv) \ |
| V(MathMinMax) \ |
| V(Mod) \ |
| V(Mul) \ |
| V(OsrEntry) \ |
| V(OuterContext) \ |
| V(Parameter) \ |
| V(Power) \ |
| V(PushArgument) \ |
| V(RegExpLiteral) \ |
| V(Return) \ |
| V(Ror) \ |
| V(Sar) \ |
| V(SeqStringGetChar) \ |
| V(SeqStringSetChar) \ |
| V(Shl) \ |
| V(Shr) \ |
| V(Simulate) \ |
| V(StackCheck) \ |
| V(StoreCodeEntry) \ |
| V(StoreContextSlot) \ |
| V(StoreGlobalCell) \ |
| V(StoreGlobalGeneric) \ |
| V(StoreKeyed) \ |
| V(StoreKeyedGeneric) \ |
| V(StoreNamedField) \ |
| V(StoreNamedGeneric) \ |
| V(StringAdd) \ |
| V(StringCharCodeAt) \ |
| V(StringCharFromCode) \ |
| V(StringCompareAndBranch) \ |
| V(Sub) \ |
| V(ThisFunction) \ |
| V(Throw) \ |
| V(ToFastProperties) \ |
| V(TransitionElementsKind) \ |
| V(TrapAllocationMemento) \ |
| V(Typeof) \ |
| V(TypeofIsAndBranch) \ |
| V(UnaryMathOperation) \ |
| V(UnknownOSRValue) \ |
| V(UseConst) \ |
| V(ValueOf) \ |
| V(WrapReceiver) |
| |
| #define GVN_TRACKED_FLAG_LIST(V) \ |
| V(Maps) \ |
| V(NewSpacePromotion) |
| |
| #define GVN_UNTRACKED_FLAG_LIST(V) \ |
| V(ArrayElements) \ |
| V(ArrayLengths) \ |
| V(StringLengths) \ |
| V(BackingStoreFields) \ |
| V(Calls) \ |
| V(ContextSlots) \ |
| V(DoubleArrayElements) \ |
| V(DoubleFields) \ |
| V(ElementsKind) \ |
| V(ElementsPointer) \ |
| V(GlobalVars) \ |
| V(InobjectFields) \ |
| V(OsrEntries) \ |
| V(ExternalMemory) \ |
| V(StringChars) |
| |
| |
| #define DECLARE_ABSTRACT_INSTRUCTION(type) \ |
| virtual bool Is##type() const V8_FINAL V8_OVERRIDE { return true; } \ |
| static H##type* cast(HValue* value) { \ |
| ASSERT(value->Is##type()); \ |
| return reinterpret_cast<H##type*>(value); \ |
| } |
| |
| |
| #define DECLARE_CONCRETE_INSTRUCTION(type) \ |
| virtual LInstruction* CompileToLithium( \ |
| LChunkBuilder* builder) V8_FINAL V8_OVERRIDE; \ |
| static H##type* cast(HValue* value) { \ |
| ASSERT(value->Is##type()); \ |
| return reinterpret_cast<H##type*>(value); \ |
| } \ |
| virtual Opcode opcode() const V8_FINAL V8_OVERRIDE { \ |
| return HValue::k##type; \ |
| } |
| |
| |
| class Range V8_FINAL : public ZoneObject { |
| public: |
| Range() |
| : lower_(kMinInt), |
| upper_(kMaxInt), |
| next_(NULL), |
| can_be_minus_zero_(false) { } |
| |
| Range(int32_t lower, int32_t upper) |
| : lower_(lower), |
| upper_(upper), |
| next_(NULL), |
| can_be_minus_zero_(false) { } |
| |
| int32_t upper() const { return upper_; } |
| int32_t lower() const { return lower_; } |
| Range* next() const { return next_; } |
| Range* CopyClearLower(Zone* zone) const { |
| return new(zone) Range(kMinInt, upper_); |
| } |
| Range* CopyClearUpper(Zone* zone) const { |
| return new(zone) Range(lower_, kMaxInt); |
| } |
| Range* Copy(Zone* zone) const { |
| Range* result = new(zone) Range(lower_, upper_); |
| result->set_can_be_minus_zero(CanBeMinusZero()); |
| return result; |
| } |
| int32_t Mask() const; |
| void set_can_be_minus_zero(bool b) { can_be_minus_zero_ = b; } |
| bool CanBeMinusZero() const { return CanBeZero() && can_be_minus_zero_; } |
| bool CanBeZero() const { return upper_ >= 0 && lower_ <= 0; } |
| bool CanBeNegative() const { return lower_ < 0; } |
| bool CanBePositive() const { return upper_ > 0; } |
| bool Includes(int value) const { return lower_ <= value && upper_ >= value; } |
| bool IsMostGeneric() const { |
| return lower_ == kMinInt && upper_ == kMaxInt && CanBeMinusZero(); |
| } |
| bool IsInSmiRange() const { |
| return lower_ >= Smi::kMinValue && upper_ <= Smi::kMaxValue; |
| } |
| void ClampToSmi() { |
| lower_ = Max(lower_, Smi::kMinValue); |
| upper_ = Min(upper_, Smi::kMaxValue); |
| } |
| void KeepOrder(); |
| #ifdef DEBUG |
| void Verify() const; |
| #endif |
| |
| void StackUpon(Range* other) { |
| Intersect(other); |
| next_ = other; |
| } |
| |
| void Intersect(Range* other); |
| void Union(Range* other); |
| void CombinedMax(Range* other); |
| void CombinedMin(Range* other); |
| |
| void AddConstant(int32_t value); |
| void Sar(int32_t value); |
| void Shl(int32_t value); |
| bool AddAndCheckOverflow(const Representation& r, Range* other); |
| bool SubAndCheckOverflow(const Representation& r, Range* other); |
| bool MulAndCheckOverflow(const Representation& r, Range* other); |
| |
| private: |
| int32_t lower_; |
| int32_t upper_; |
| Range* next_; |
| bool can_be_minus_zero_; |
| }; |
| |
| |
| class HType V8_FINAL { |
| public: |
| static HType None() { return HType(kNone); } |
| static HType Tagged() { return HType(kTagged); } |
| static HType TaggedPrimitive() { return HType(kTaggedPrimitive); } |
| static HType TaggedNumber() { return HType(kTaggedNumber); } |
| static HType Smi() { return HType(kSmi); } |
| static HType HeapNumber() { return HType(kHeapNumber); } |
| static HType String() { return HType(kString); } |
| static HType Boolean() { return HType(kBoolean); } |
| static HType NonPrimitive() { return HType(kNonPrimitive); } |
| static HType JSArray() { return HType(kJSArray); } |
| static HType JSObject() { return HType(kJSObject); } |
| |
| // Return the weakest (least precise) common type. |
| HType Combine(HType other) { |
| return HType(static_cast<Type>(type_ & other.type_)); |
| } |
| |
| bool Equals(const HType& other) const { |
| return type_ == other.type_; |
| } |
| |
| bool IsSubtypeOf(const HType& other) { |
| return Combine(other).Equals(other); |
| } |
| |
| bool IsTaggedPrimitive() const { |
| return ((type_ & kTaggedPrimitive) == kTaggedPrimitive); |
| } |
| |
| bool IsTaggedNumber() const { |
| return ((type_ & kTaggedNumber) == kTaggedNumber); |
| } |
| |
| bool IsSmi() const { |
| return ((type_ & kSmi) == kSmi); |
| } |
| |
| bool IsHeapNumber() const { |
| return ((type_ & kHeapNumber) == kHeapNumber); |
| } |
| |
| bool IsString() const { |
| return ((type_ & kString) == kString); |
| } |
| |
| bool IsNonString() const { |
| return IsTaggedPrimitive() || IsSmi() || IsHeapNumber() || |
| IsBoolean() || IsJSArray(); |
| } |
| |
| bool IsBoolean() const { |
| return ((type_ & kBoolean) == kBoolean); |
| } |
| |
| bool IsNonPrimitive() const { |
| return ((type_ & kNonPrimitive) == kNonPrimitive); |
| } |
| |
| bool IsJSArray() const { |
| return ((type_ & kJSArray) == kJSArray); |
| } |
| |
| bool IsJSObject() const { |
| return ((type_ & kJSObject) == kJSObject); |
| } |
| |
| bool IsHeapObject() const { |
| return IsHeapNumber() || IsString() || IsBoolean() || IsNonPrimitive(); |
| } |
| |
| bool ToStringOrToNumberCanBeObserved(Representation representation) { |
| switch (type_) { |
| case kTaggedPrimitive: // fallthru |
| case kTaggedNumber: // fallthru |
| case kSmi: // fallthru |
| case kHeapNumber: // fallthru |
| case kString: // fallthru |
| case kBoolean: |
| return false; |
| case kJSArray: // fallthru |
| case kJSObject: |
| return true; |
| case kTagged: |
| break; |
| } |
| return !representation.IsSmiOrInteger32() && !representation.IsDouble(); |
| } |
| |
| static HType TypeFromValue(Handle<Object> value); |
| |
| const char* ToString(); |
| |
| private: |
| enum Type { |
| kNone = 0x0, // 0000 0000 0000 0000 |
| kTagged = 0x1, // 0000 0000 0000 0001 |
| kTaggedPrimitive = 0x5, // 0000 0000 0000 0101 |
| kTaggedNumber = 0xd, // 0000 0000 0000 1101 |
| kSmi = 0x1d, // 0000 0000 0001 1101 |
| kHeapNumber = 0x2d, // 0000 0000 0010 1101 |
| kString = 0x45, // 0000 0000 0100 0101 |
| kBoolean = 0x85, // 0000 0000 1000 0101 |
| kNonPrimitive = 0x101, // 0000 0001 0000 0001 |
| kJSObject = 0x301, // 0000 0011 0000 0001 |
| kJSArray = 0x701 // 0000 0111 0000 0001 |
| }; |
| |
| // Make sure type fits in int16. |
| STATIC_ASSERT(kJSArray < (1 << (2 * kBitsPerByte))); |
| |
| explicit HType(Type t) : type_(t) { } |
| |
| int16_t type_; |
| }; |
| |
| |
| class HUseListNode: public ZoneObject { |
| public: |
| HUseListNode(HValue* value, int index, HUseListNode* tail) |
| : tail_(tail), value_(value), index_(index) { |
| } |
| |
| HUseListNode* tail(); |
| HValue* value() const { return value_; } |
| int index() const { return index_; } |
| |
| void set_tail(HUseListNode* list) { tail_ = list; } |
| |
| #ifdef DEBUG |
| void Zap() { |
| tail_ = reinterpret_cast<HUseListNode*>(1); |
| value_ = NULL; |
| index_ = -1; |
| } |
| #endif |
| |
| private: |
| HUseListNode* tail_; |
| HValue* value_; |
| int index_; |
| }; |
| |
| |
| // We reuse use list nodes behind the scenes as uses are added and deleted. |
| // This class is the safe way to iterate uses while deleting them. |
| class HUseIterator V8_FINAL BASE_EMBEDDED { |
| public: |
| bool Done() { return current_ == NULL; } |
| void Advance(); |
| |
| HValue* value() { |
| ASSERT(!Done()); |
| return value_; |
| } |
| |
| int index() { |
| ASSERT(!Done()); |
| return index_; |
| } |
| |
| private: |
| explicit HUseIterator(HUseListNode* head); |
| |
| HUseListNode* current_; |
| HUseListNode* next_; |
| HValue* value_; |
| int index_; |
| |
| friend class HValue; |
| }; |
| |
| |
| // There must be one corresponding kDepends flag for every kChanges flag and |
| // the order of the kChanges flags must be exactly the same as of the kDepends |
| // flags. All tracked flags should appear before untracked ones. |
| enum GVNFlag { |
| // Declare global value numbering flags. |
| #define DECLARE_FLAG(type) kChanges##type, kDependsOn##type, |
| GVN_TRACKED_FLAG_LIST(DECLARE_FLAG) |
| GVN_UNTRACKED_FLAG_LIST(DECLARE_FLAG) |
| #undef DECLARE_FLAG |
| kAfterLastFlag, |
| kLastFlag = kAfterLastFlag - 1, |
| #define COUNT_FLAG(type) + 1 |
| kNumberOfTrackedSideEffects = 0 GVN_TRACKED_FLAG_LIST(COUNT_FLAG) |
| #undef COUNT_FLAG |
| }; |
| |
| |
| class DecompositionResult V8_FINAL BASE_EMBEDDED { |
| public: |
| DecompositionResult() : base_(NULL), offset_(0), scale_(0) {} |
| |
| HValue* base() { return base_; } |
| int offset() { return offset_; } |
| int scale() { return scale_; } |
| |
| bool Apply(HValue* other_base, int other_offset, int other_scale = 0) { |
| if (base_ == NULL) { |
| base_ = other_base; |
| offset_ = other_offset; |
| scale_ = other_scale; |
| return true; |
| } else { |
| if (scale_ == 0) { |
| base_ = other_base; |
| offset_ += other_offset; |
| scale_ = other_scale; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |
| |
| void SwapValues(HValue** other_base, int* other_offset, int* other_scale) { |
| swap(&base_, other_base); |
| swap(&offset_, other_offset); |
| swap(&scale_, other_scale); |
| } |
| |
| private: |
| template <class T> void swap(T* a, T* b) { |
| T c(*a); |
| *a = *b; |
| *b = c; |
| } |
| |
| HValue* base_; |
| int offset_; |
| int scale_; |
| }; |
| |
| |
| typedef EnumSet<GVNFlag, int64_t> GVNFlagSet; |
| |
| |
| class HValue : public ZoneObject { |
| public: |
| static const int kNoNumber = -1; |
| |
| enum Flag { |
| kFlexibleRepresentation, |
| kCannotBeTagged, |
| // Participate in Global Value Numbering, i.e. elimination of |
| // unnecessary recomputations. If an instruction sets this flag, it must |
| // implement DataEquals(), which will be used to determine if other |
| // occurrences of the instruction are indeed the same. |
| kUseGVN, |
| // Track instructions that are dominating side effects. If an instruction |
| // sets this flag, it must implement HandleSideEffectDominator() and should |
| // indicate which side effects to track by setting GVN flags. |
| kTrackSideEffectDominators, |
| kCanOverflow, |
| kBailoutOnMinusZero, |
| kCanBeDivByZero, |
| kAllowUndefinedAsNaN, |
| kIsArguments, |
| kTruncatingToInt32, |
| kAllUsesTruncatingToInt32, |
| kTruncatingToSmi, |
| kAllUsesTruncatingToSmi, |
| // Set after an instruction is killed. |
| kIsDead, |
| // Instructions that are allowed to produce full range unsigned integer |
| // values are marked with kUint32 flag. If arithmetic shift or a load from |
| // EXTERNAL_UNSIGNED_INT_ELEMENTS array is not marked with this flag |
| // it will deoptimize if result does not fit into signed integer range. |
| // HGraph::ComputeSafeUint32Operations is responsible for setting this |
| // flag. |
| kUint32, |
| kHasNoObservableSideEffects, |
| // Indicates the instruction is live during dead code elimination. |
| kIsLive, |
| |
| // HEnvironmentMarkers are deleted before dead code |
| // elimination takes place, so they can repurpose the kIsLive flag: |
| kEndsLiveRange = kIsLive, |
| |
| // TODO(everyone): Don't forget to update this! |
| kLastFlag = kIsLive |
| }; |
| |
| STATIC_ASSERT(kLastFlag < kBitsPerInt); |
| |
| static const int kChangesToDependsFlagsLeftShift = 1; |
| |
| static GVNFlag ChangesFlagFromInt(int x) { |
| return static_cast<GVNFlag>(x * 2); |
| } |
| static GVNFlag DependsOnFlagFromInt(int x) { |
| return static_cast<GVNFlag>(x * 2 + 1); |
| } |
| static GVNFlagSet ConvertChangesToDependsFlags(GVNFlagSet flags) { |
| return GVNFlagSet(flags.ToIntegral() << kChangesToDependsFlagsLeftShift); |
| } |
| |
| static HValue* cast(HValue* value) { return value; } |
| |
| enum Opcode { |
| // Declare a unique enum value for each hydrogen instruction. |
| #define DECLARE_OPCODE(type) k##type, |
| HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_OPCODE) |
| kPhi |
| #undef DECLARE_OPCODE |
| }; |
| virtual Opcode opcode() const = 0; |
| |
| // Declare a non-virtual predicates for each concrete HInstruction or HValue. |
| #define DECLARE_PREDICATE(type) \ |
| bool Is##type() const { return opcode() == k##type; } |
| HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_PREDICATE) |
| #undef DECLARE_PREDICATE |
| bool IsPhi() const { return opcode() == kPhi; } |
| |
| // Declare virtual predicates for abstract HInstruction or HValue |
| #define DECLARE_PREDICATE(type) \ |
| virtual bool Is##type() const { return false; } |
| HYDROGEN_ABSTRACT_INSTRUCTION_LIST(DECLARE_PREDICATE) |
| #undef DECLARE_PREDICATE |
| |
| HValue(HType type = HType::Tagged()) |
| : block_(NULL), |
| id_(kNoNumber), |
| type_(type), |
| use_list_(NULL), |
| range_(NULL), |
| flags_(0) {} |
| virtual ~HValue() {} |
| |
| virtual int position() const { return RelocInfo::kNoPosition; } |
| virtual int operand_position(int index) const { return position(); } |
| |
| HBasicBlock* block() const { return block_; } |
| void SetBlock(HBasicBlock* block); |
| int LoopWeight() const; |
| |
| // Note: Never call this method for an unlinked value. |
| Isolate* isolate() const; |
| |
| int id() const { return id_; } |
| void set_id(int id) { id_ = id; } |
| |
| HUseIterator uses() const { return HUseIterator(use_list_); } |
| |
| virtual bool EmitAtUses() { return false; } |
| |
| Representation representation() const { return representation_; } |
| void ChangeRepresentation(Representation r) { |
| ASSERT(CheckFlag(kFlexibleRepresentation)); |
| ASSERT(!CheckFlag(kCannotBeTagged) || !r.IsTagged()); |
| RepresentationChanged(r); |
| representation_ = r; |
| if (r.IsTagged()) { |
| // Tagged is the bottom of the lattice, don't go any further. |
| ClearFlag(kFlexibleRepresentation); |
| } |
| } |
| virtual void AssumeRepresentation(Representation r); |
| |
| virtual Representation KnownOptimalRepresentation() { |
| Representation r = representation(); |
| if (r.IsTagged()) { |
| HType t = type(); |
| if (t.IsSmi()) return Representation::Smi(); |
| if (t.IsHeapNumber()) return Representation::Double(); |
| if (t.IsHeapObject()) return r; |
| return Representation::None(); |
| } |
| return r; |
| } |
| |
| HType type() const { return type_; } |
| void set_type(HType new_type) { |
| ASSERT(new_type.IsSubtypeOf(type_)); |
| type_ = new_type; |
| } |
| |
| bool IsHeapObject() { |
| return representation_.IsHeapObject() || type_.IsHeapObject(); |
| } |
| |
| // An operation needs to override this function iff: |
| // 1) it can produce an int32 output. |
| // 2) the true value of its output can potentially be minus zero. |
| // The implementation must set a flag so that it bails out in the case where |
| // it would otherwise output what should be a minus zero as an int32 zero. |
| // If the operation also exists in a form that takes int32 and outputs int32 |
| // then the operation should return its input value so that we can propagate |
| // back. There are three operations that need to propagate back to more than |
| // one input. They are phi and binary div and mul. They always return NULL |
| // and expect the caller to take care of things. |
| virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited) { |
| visited->Add(id()); |
| return NULL; |
| } |
| |
| // There are HInstructions that do not really change a value, they |
| // only add pieces of information to it (like bounds checks, map checks, |
| // smi checks...). |
| // We call these instructions "informative definitions", or "iDef". |
| // One of the iDef operands is special because it is the value that is |
| // "transferred" to the output, we call it the "redefined operand". |
| // If an HValue is an iDef it must override RedefinedOperandIndex() so that |
| // it does not return kNoRedefinedOperand; |
| static const int kNoRedefinedOperand = -1; |
| virtual int RedefinedOperandIndex() { return kNoRedefinedOperand; } |
| bool IsInformativeDefinition() { |
| return RedefinedOperandIndex() != kNoRedefinedOperand; |
| } |
| HValue* RedefinedOperand() { |
| int index = RedefinedOperandIndex(); |
| return index == kNoRedefinedOperand ? NULL : OperandAt(index); |
| } |
| |
| bool CanReplaceWithDummyUses(); |
| |
| virtual int argument_delta() const { return 0; } |
| |
| // A purely informative definition is an idef that will not emit code and |
| // should therefore be removed from the graph in the RestoreActualValues |
| // phase (so that live ranges will be shorter). |
| virtual bool IsPurelyInformativeDefinition() { return false; } |
| |
| // This method must always return the original HValue SSA definition, |
| // regardless of any chain of iDefs of this value. |
| HValue* ActualValue() { |
| HValue* value = this; |
| int index; |
| while ((index = value->RedefinedOperandIndex()) != kNoRedefinedOperand) { |
| value = value->OperandAt(index); |
| } |
| return value; |
| } |
| |
| bool IsInteger32Constant(); |
| int32_t GetInteger32Constant(); |
| bool EqualsInteger32Constant(int32_t value); |
| |
| bool IsDefinedAfter(HBasicBlock* other) const; |
| |
| // Operands. |
| virtual int OperandCount() = 0; |
| virtual HValue* OperandAt(int index) const = 0; |
| void SetOperandAt(int index, HValue* value); |
| |
| void DeleteAndReplaceWith(HValue* other); |
| void ReplaceAllUsesWith(HValue* other); |
| bool HasNoUses() const { return use_list_ == NULL; } |
| bool HasMultipleUses() const { |
| return use_list_ != NULL && use_list_->tail() != NULL; |
| } |
| int UseCount() const; |
| |
| // Mark this HValue as dead and to be removed from other HValues' use lists. |
| void Kill(); |
| |
| int flags() const { return flags_; } |
| void SetFlag(Flag f) { flags_ |= (1 << f); } |
| void ClearFlag(Flag f) { flags_ &= ~(1 << f); } |
| bool CheckFlag(Flag f) const { return (flags_ & (1 << f)) != 0; } |
| void CopyFlag(Flag f, HValue* other) { |
| if (other->CheckFlag(f)) SetFlag(f); |
| } |
| |
| // Returns true if the flag specified is set for all uses, false otherwise. |
| bool CheckUsesForFlag(Flag f) const; |
| // Same as before and the first one without the flag is returned in value. |
| bool CheckUsesForFlag(Flag f, HValue** value) const; |
| // Returns true if the flag specified is set for all uses, and this set |
| // of uses is non-empty. |
| bool HasAtLeastOneUseWithFlagAndNoneWithout(Flag f) const; |
| |
| GVNFlagSet gvn_flags() const { return gvn_flags_; } |
| void SetGVNFlag(GVNFlag f) { gvn_flags_.Add(f); } |
| void ClearGVNFlag(GVNFlag f) { gvn_flags_.Remove(f); } |
| bool CheckGVNFlag(GVNFlag f) const { return gvn_flags_.Contains(f); } |
| void SetAllSideEffects() { gvn_flags_.Add(AllSideEffectsFlagSet()); } |
| void ClearAllSideEffects() { |
| gvn_flags_.Remove(AllSideEffectsFlagSet()); |
| } |
| bool HasSideEffects() const { |
| return gvn_flags_.ContainsAnyOf(AllSideEffectsFlagSet()); |
| } |
| bool HasObservableSideEffects() const { |
| return !CheckFlag(kHasNoObservableSideEffects) && |
| gvn_flags_.ContainsAnyOf(AllObservableSideEffectsFlagSet()); |
| } |
| |
| GVNFlagSet DependsOnFlags() const { |
| GVNFlagSet result = gvn_flags_; |
| result.Intersect(AllDependsOnFlagSet()); |
| return result; |
| } |
| |
| GVNFlagSet SideEffectFlags() const { |
| GVNFlagSet result = gvn_flags_; |
| result.Intersect(AllSideEffectsFlagSet()); |
| return result; |
| } |
| |
| GVNFlagSet ChangesFlags() const { |
| GVNFlagSet result = gvn_flags_; |
| result.Intersect(AllChangesFlagSet()); |
| return result; |
| } |
| |
| GVNFlagSet ObservableChangesFlags() const { |
| GVNFlagSet result = gvn_flags_; |
| result.Intersect(AllChangesFlagSet()); |
| result.Intersect(AllObservableSideEffectsFlagSet()); |
| return result; |
| } |
| |
| Range* range() const { return range_; } |
| // TODO(svenpanne) We should really use the null object pattern here. |
| bool HasRange() const { return range_ != NULL; } |
| bool CanBeNegative() const { return !HasRange() || range()->CanBeNegative(); } |
| bool CanBeZero() const { return !HasRange() || range()->CanBeZero(); } |
| bool RangeCanInclude(int value) const { |
| return !HasRange() || range()->Includes(value); |
| } |
| void AddNewRange(Range* r, Zone* zone); |
| void RemoveLastAddedRange(); |
| void ComputeInitialRange(Zone* zone); |
| |
| // Escape analysis helpers. |
| virtual bool HasEscapingOperandAt(int index) { return true; } |
| virtual bool HasOutOfBoundsAccess(int size) { return false; } |
| |
| // Representation helpers. |
| virtual Representation observed_input_representation(int index) { |
| return Representation::None(); |
| } |
| virtual Representation RequiredInputRepresentation(int index) = 0; |
| virtual void InferRepresentation(HInferRepresentationPhase* h_infer); |
| |
| // This gives the instruction an opportunity to replace itself with an |
| // instruction that does the same in some better way. To replace an |
| // instruction with a new one, first add the new instruction to the graph, |
| // then return it. Return NULL to have the instruction deleted. |
| virtual HValue* Canonicalize() { return this; } |
| |
| bool Equals(HValue* other); |
| virtual intptr_t Hashcode(); |
| |
| // Compute unique ids upfront that is safe wrt GC and concurrent compilation. |
| virtual void FinalizeUniqueness() { } |
| |
| // Printing support. |
| virtual void PrintTo(StringStream* stream) = 0; |
| void PrintNameTo(StringStream* stream); |
| void PrintTypeTo(StringStream* stream); |
| void PrintRangeTo(StringStream* stream); |
| void PrintChangesTo(StringStream* stream); |
| |
| const char* Mnemonic() const; |
| |
| // Type information helpers. |
| bool HasMonomorphicJSObjectType(); |
| |
| // TODO(mstarzinger): For now instructions can override this function to |
| // specify statically known types, once HType can convey more information |
| // it should be based on the HType. |
| virtual Handle<Map> GetMonomorphicJSObjectMap() { return Handle<Map>(); } |
| |
| // Updated the inferred type of this instruction and returns true if |
| // it has changed. |
| bool UpdateInferredType(); |
| |
| virtual HType CalculateInferredType(); |
| |
| // This function must be overridden for instructions which have the |
| // kTrackSideEffectDominators flag set, to track instructions that are |
| // dominating side effects. |
| virtual void HandleSideEffectDominator(GVNFlag side_effect, |
| HValue* dominator) { |
| UNREACHABLE(); |
| } |
| |
| // Check if this instruction has some reason that prevents elimination. |
| bool CannotBeEliminated() const { |
| return HasObservableSideEffects() || !IsDeletable(); |
| } |
| |
| #ifdef DEBUG |
| virtual void Verify() = 0; |
| #endif |
| |
| virtual bool TryDecompose(DecompositionResult* decomposition) { |
| if (RedefinedOperand() != NULL) { |
| return RedefinedOperand()->TryDecompose(decomposition); |
| } else { |
| return false; |
| } |
| } |
| |
| // Returns true conservatively if the program might be able to observe a |
| // ToString() operation on this value. |
| bool ToStringCanBeObserved() const { |
| return type().ToStringOrToNumberCanBeObserved(representation()); |
| } |
| |
| // Returns true conservatively if the program might be able to observe a |
| // ToNumber() operation on this value. |
| bool ToNumberCanBeObserved() const { |
| return type().ToStringOrToNumberCanBeObserved(representation()); |
| } |
| |
| MinusZeroMode GetMinusZeroMode() { |
| return CheckFlag(kBailoutOnMinusZero) |
| ? FAIL_ON_MINUS_ZERO : TREAT_MINUS_ZERO_AS_ZERO; |
| } |
| |
| protected: |
| // This function must be overridden for instructions with flag kUseGVN, to |
| // compare the non-Operand parts of the instruction. |
| virtual bool DataEquals(HValue* other) { |
| UNREACHABLE(); |
| return false; |
| } |
| |
| virtual Representation RepresentationFromInputs() { |
| return representation(); |
| } |
| Representation RepresentationFromUses(); |
| Representation RepresentationFromUseRequirements(); |
| bool HasNonSmiUse(); |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason); |
| void AddDependantsToWorklist(HInferRepresentationPhase* h_infer); |
| |
| virtual void RepresentationChanged(Representation to) { } |
| |
| virtual Range* InferRange(Zone* zone); |
| virtual void DeleteFromGraph() = 0; |
| virtual void InternalSetOperandAt(int index, HValue* value) = 0; |
| void clear_block() { |
| ASSERT(block_ != NULL); |
| block_ = NULL; |
| } |
| |
| void set_representation(Representation r) { |
| ASSERT(representation_.IsNone() && !r.IsNone()); |
| representation_ = r; |
| } |
| |
| static GVNFlagSet AllDependsOnFlagSet() { |
| GVNFlagSet result; |
| // Create changes mask. |
| #define ADD_FLAG(type) result.Add(kDependsOn##type); |
| GVN_TRACKED_FLAG_LIST(ADD_FLAG) |
| GVN_UNTRACKED_FLAG_LIST(ADD_FLAG) |
| #undef ADD_FLAG |
| return result; |
| } |
| |
| static GVNFlagSet AllChangesFlagSet() { |
| GVNFlagSet result; |
| // Create changes mask. |
| #define ADD_FLAG(type) result.Add(kChanges##type); |
| GVN_TRACKED_FLAG_LIST(ADD_FLAG) |
| GVN_UNTRACKED_FLAG_LIST(ADD_FLAG) |
| #undef ADD_FLAG |
| return result; |
| } |
| |
| // A flag mask to mark an instruction as having arbitrary side effects. |
| static GVNFlagSet AllSideEffectsFlagSet() { |
| GVNFlagSet result = AllChangesFlagSet(); |
| result.Remove(kChangesOsrEntries); |
| return result; |
| } |
| |
| // A flag mask of all side effects that can make observable changes in |
| // an executing program (i.e. are not safe to repeat, move or remove); |
| static GVNFlagSet AllObservableSideEffectsFlagSet() { |
| GVNFlagSet result = AllChangesFlagSet(); |
| result.Remove(kChangesNewSpacePromotion); |
| result.Remove(kChangesElementsKind); |
| result.Remove(kChangesElementsPointer); |
| result.Remove(kChangesMaps); |
| return result; |
| } |
| |
| // Remove the matching use from the use list if present. Returns the |
| // removed list node or NULL. |
| HUseListNode* RemoveUse(HValue* value, int index); |
| |
| void RegisterUse(int index, HValue* new_value); |
| |
| HBasicBlock* block_; |
| |
| // The id of this instruction in the hydrogen graph, assigned when first |
| // added to the graph. Reflects creation order. |
| int id_; |
| |
| Representation representation_; |
| HType type_; |
| HUseListNode* use_list_; |
| Range* range_; |
| int flags_; |
| GVNFlagSet gvn_flags_; |
| |
| private: |
| virtual bool IsDeletable() const { return false; } |
| |
| DISALLOW_COPY_AND_ASSIGN(HValue); |
| }; |
| |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P0(I) \ |
| static I* New(Zone* zone, HValue* context) { \ |
| return new(zone) I(); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P1(I, P1) \ |
| static I* New(Zone* zone, HValue* context, P1 p1) { \ |
| return new(zone) I(p1); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P2(I, P1, P2) \ |
| static I* New(Zone* zone, HValue* context, P1 p1, P2 p2) { \ |
| return new(zone) I(p1, p2); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P3(I, P1, P2, P3) \ |
| static I* New(Zone* zone, HValue* context, P1 p1, P2 p2, P3 p3) { \ |
| return new(zone) I(p1, p2, p3); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P4(I, P1, P2, P3, P4) \ |
| static I* New(Zone* zone, \ |
| HValue* context, \ |
| P1 p1, \ |
| P2 p2, \ |
| P3 p3, \ |
| P4 p4) { \ |
| return new(zone) I(p1, p2, p3, p4); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_FACTORY_P5(I, P1, P2, P3, P4, P5) \ |
| static I* New(Zone* zone, \ |
| HValue* context, \ |
| P1 p1, \ |
| P2 p2, \ |
| P3 p3, \ |
| P4 p4, \ |
| P5 p5) { \ |
| return new(zone) I(p1, p2, p3, p4, p5); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P0(I) \ |
| static I* New(Zone* zone, HValue* context) { \ |
| return new(zone) I(context); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(I, P1) \ |
| static I* New(Zone* zone, HValue* context, P1 p1) { \ |
| return new(zone) I(context, p1); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(I, P1, P2) \ |
| static I* New(Zone* zone, HValue* context, P1 p1, P2 p2) { \ |
| return new(zone) I(context, p1, p2); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(I, P1, P2, P3) \ |
| static I* New(Zone* zone, HValue* context, P1 p1, P2 p2, P3 p3) { \ |
| return new(zone) I(context, p1, p2, p3); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(I, P1, P2, P3, P4) \ |
| static I* New(Zone* zone, \ |
| HValue* context, \ |
| P1 p1, \ |
| P2 p2, \ |
| P3 p3, \ |
| P4 p4) { \ |
| return new(zone) I(context, p1, p2, p3, p4); \ |
| } |
| |
| #define DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P5(I, P1, P2, P3, P4, P5) \ |
| static I* New(Zone* zone, \ |
| HValue* context, \ |
| P1 p1, \ |
| P2 p2, \ |
| P3 p3, \ |
| P4 p4, \ |
| P5 p5) { \ |
| return new(zone) I(context, p1, p2, p3, p4, p5); \ |
| } |
| |
| |
| // A helper class to represent per-operand position information attached to |
| // the HInstruction in the compact form. Uses tagging to distinguish between |
| // case when only instruction's position is available and case when operands' |
| // positions are also available. |
| // In the first case it contains intruction's position as a tagged value. |
| // In the second case it points to an array which contains instruction's |
| // position and operands' positions. |
| // TODO(vegorov): what we really want to track here is a combination of |
| // source position and a script id because cross script inlining can easily |
| // result in optimized functions composed of several scripts. |
| class HPositionInfo { |
| public: |
| explicit HPositionInfo(int pos) : data_(TagPosition(pos)) { } |
| |
| int position() const { |
| if (has_operand_positions()) { |
| return static_cast<int>(operand_positions()[kInstructionPosIndex]); |
| } |
| return static_cast<int>(UntagPosition(data_)); |
| } |
| |
| void set_position(int pos) { |
| if (has_operand_positions()) { |
| operand_positions()[kInstructionPosIndex] = pos; |
| } else { |
| data_ = TagPosition(pos); |
| } |
| } |
| |
| void ensure_storage_for_operand_positions(Zone* zone, int operand_count) { |
| if (has_operand_positions()) { |
| return; |
| } |
| |
| const int length = kFirstOperandPosIndex + operand_count; |
| intptr_t* positions = |
| zone->NewArray<intptr_t>(length); |
| for (int i = 0; i < length; i++) { |
| positions[i] = RelocInfo::kNoPosition; |
| } |
| |
| const int pos = position(); |
| data_ = reinterpret_cast<intptr_t>(positions); |
| set_position(pos); |
| |
| ASSERT(has_operand_positions()); |
| } |
| |
| int operand_position(int idx) const { |
| if (!has_operand_positions()) { |
| return position(); |
| } |
| return static_cast<int>(*operand_position_slot(idx)); |
| } |
| |
| void set_operand_position(int idx, int pos) { |
| *operand_position_slot(idx) = pos; |
| } |
| |
| private: |
| static const intptr_t kInstructionPosIndex = 0; |
| static const intptr_t kFirstOperandPosIndex = 1; |
| |
| intptr_t* operand_position_slot(int idx) const { |
| ASSERT(has_operand_positions()); |
| return &(operand_positions()[kFirstOperandPosIndex + idx]); |
| } |
| |
| bool has_operand_positions() const { |
| return !IsTaggedPosition(data_); |
| } |
| |
| intptr_t* operand_positions() const { |
| ASSERT(has_operand_positions()); |
| return reinterpret_cast<intptr_t*>(data_); |
| } |
| |
| static const intptr_t kPositionTag = 1; |
| static const intptr_t kPositionShift = 1; |
| static bool IsTaggedPosition(intptr_t val) { |
| return (val & kPositionTag) != 0; |
| } |
| static intptr_t UntagPosition(intptr_t val) { |
| ASSERT(IsTaggedPosition(val)); |
| return val >> kPositionShift; |
| } |
| static intptr_t TagPosition(intptr_t val) { |
| const intptr_t result = (val << kPositionShift) | kPositionTag; |
| ASSERT(UntagPosition(result) == val); |
| return result; |
| } |
| |
| intptr_t data_; |
| }; |
| |
| |
| class HInstruction : public HValue { |
| public: |
| HInstruction* next() const { return next_; } |
| HInstruction* previous() const { return previous_; } |
| |
| virtual void PrintTo(StringStream* stream) V8_OVERRIDE; |
| virtual void PrintDataTo(StringStream* stream); |
| |
| bool IsLinked() const { return block() != NULL; } |
| void Unlink(); |
| void InsertBefore(HInstruction* next); |
| void InsertAfter(HInstruction* previous); |
| |
| // The position is a write-once variable. |
| virtual int position() const V8_OVERRIDE { |
| return position_.position(); |
| } |
| bool has_position() const { |
| return position_.position() != RelocInfo::kNoPosition; |
| } |
| void set_position(int position) { |
| ASSERT(!has_position()); |
| ASSERT(position != RelocInfo::kNoPosition); |
| position_.set_position(position); |
| } |
| |
| virtual int operand_position(int index) const V8_OVERRIDE { |
| const int pos = position_.operand_position(index); |
| return (pos != RelocInfo::kNoPosition) ? pos : position(); |
| } |
| void set_operand_position(Zone* zone, int index, int pos) { |
| ASSERT(0 <= index && index < OperandCount()); |
| position_.ensure_storage_for_operand_positions(zone, OperandCount()); |
| position_.set_operand_position(index, pos); |
| } |
| |
| bool CanTruncateToInt32() const { return CheckFlag(kTruncatingToInt32); } |
| |
| virtual LInstruction* CompileToLithium(LChunkBuilder* builder) = 0; |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE; |
| #endif |
| |
| virtual bool IsCall() { return false; } |
| |
| DECLARE_ABSTRACT_INSTRUCTION(Instruction) |
| |
| protected: |
| HInstruction(HType type = HType::Tagged()) |
| : HValue(type), |
| next_(NULL), |
| previous_(NULL), |
| position_(RelocInfo::kNoPosition) { |
| SetGVNFlag(kDependsOnOsrEntries); |
| } |
| |
| virtual void DeleteFromGraph() V8_OVERRIDE { Unlink(); } |
| |
| private: |
| void InitializeAsFirst(HBasicBlock* block) { |
| ASSERT(!IsLinked()); |
| SetBlock(block); |
| } |
| |
| void PrintMnemonicTo(StringStream* stream); |
| |
| HInstruction* next_; |
| HInstruction* previous_; |
| HPositionInfo position_; |
| |
| friend class HBasicBlock; |
| }; |
| |
| |
| template<int V> |
| class HTemplateInstruction : public HInstruction { |
| public: |
| virtual int OperandCount() V8_FINAL V8_OVERRIDE { return V; } |
| virtual HValue* OperandAt(int i) const V8_FINAL V8_OVERRIDE { |
| return inputs_[i]; |
| } |
| |
| protected: |
| HTemplateInstruction(HType type = HType::Tagged()) : HInstruction(type) {} |
| |
| virtual void InternalSetOperandAt(int i, HValue* value) V8_FINAL V8_OVERRIDE { |
| inputs_[i] = value; |
| } |
| |
| private: |
| EmbeddedContainer<HValue*, V> inputs_; |
| }; |
| |
| |
| class HControlInstruction : public HInstruction { |
| public: |
| virtual HBasicBlock* SuccessorAt(int i) = 0; |
| virtual int SuccessorCount() = 0; |
| virtual void SetSuccessorAt(int i, HBasicBlock* block) = 0; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) { |
| *block = NULL; |
| return false; |
| } |
| |
| HBasicBlock* FirstSuccessor() { |
| return SuccessorCount() > 0 ? SuccessorAt(0) : NULL; |
| } |
| HBasicBlock* SecondSuccessor() { |
| return SuccessorCount() > 1 ? SuccessorAt(1) : NULL; |
| } |
| |
| void Not() { |
| HBasicBlock* swap = SuccessorAt(0); |
| SetSuccessorAt(0, SuccessorAt(1)); |
| SetSuccessorAt(1, swap); |
| } |
| |
| DECLARE_ABSTRACT_INSTRUCTION(ControlInstruction) |
| }; |
| |
| |
| class HSuccessorIterator V8_FINAL BASE_EMBEDDED { |
| public: |
| explicit HSuccessorIterator(HControlInstruction* instr) |
| : instr_(instr), current_(0) { } |
| |
| bool Done() { return current_ >= instr_->SuccessorCount(); } |
| HBasicBlock* Current() { return instr_->SuccessorAt(current_); } |
| void Advance() { current_++; } |
| |
| private: |
| HControlInstruction* instr_; |
| int current_; |
| }; |
| |
| |
| template<int S, int V> |
| class HTemplateControlInstruction : public HControlInstruction { |
| public: |
| int SuccessorCount() V8_OVERRIDE { return S; } |
| HBasicBlock* SuccessorAt(int i) V8_OVERRIDE { return successors_[i]; } |
| void SetSuccessorAt(int i, HBasicBlock* block) V8_OVERRIDE { |
| successors_[i] = block; |
| } |
| |
| int OperandCount() V8_OVERRIDE { return V; } |
| HValue* OperandAt(int i) const V8_OVERRIDE { return inputs_[i]; } |
| |
| |
| protected: |
| void InternalSetOperandAt(int i, HValue* value) V8_OVERRIDE { |
| inputs_[i] = value; |
| } |
| |
| private: |
| EmbeddedContainer<HBasicBlock*, S> successors_; |
| EmbeddedContainer<HValue*, V> inputs_; |
| }; |
| |
| |
| class HBlockEntry V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(BlockEntry) |
| }; |
| |
| |
| class HDummyUse V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| explicit HDummyUse(HValue* value) |
| : HTemplateInstruction<1>(HType::Smi()) { |
| SetOperandAt(0, value); |
| // Pretend to be a Smi so that the HChange instructions inserted |
| // before any use generate as little code as possible. |
| set_representation(Representation::Tagged()); |
| } |
| |
| HValue* value() { return OperandAt(0); } |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { return false; } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(DummyUse); |
| }; |
| |
| |
| // Inserts an int3/stop break instruction for debugging purposes. |
| class HDebugBreak V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P0(HDebugBreak); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(DebugBreak) |
| }; |
| |
| |
| class HGoto V8_FINAL : public HTemplateControlInstruction<1, 0> { |
| public: |
| explicit HGoto(HBasicBlock* target) { |
| SetSuccessorAt(0, target); |
| } |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE { |
| *block = FirstSuccessor(); |
| return true; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(Goto) |
| }; |
| |
| |
| class HDeoptimize V8_FINAL : public HTemplateControlInstruction<1, 0> { |
| public: |
| static HDeoptimize* New(Zone* zone, |
| HValue* context, |
| const char* reason, |
| Deoptimizer::BailoutType type, |
| HBasicBlock* unreachable_continuation) { |
| return new(zone) HDeoptimize(reason, type, unreachable_continuation); |
| } |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE { |
| *block = NULL; |
| return true; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| const char* reason() const { return reason_; } |
| Deoptimizer::BailoutType type() { return type_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Deoptimize) |
| |
| private: |
| explicit HDeoptimize(const char* reason, |
| Deoptimizer::BailoutType type, |
| HBasicBlock* unreachable_continuation) |
| : reason_(reason), type_(type) { |
| SetSuccessorAt(0, unreachable_continuation); |
| } |
| |
| const char* reason_; |
| Deoptimizer::BailoutType type_; |
| }; |
| |
| |
| class HUnaryControlInstruction : public HTemplateControlInstruction<2, 1> { |
| public: |
| HUnaryControlInstruction(HValue* value, |
| HBasicBlock* true_target, |
| HBasicBlock* false_target) { |
| SetOperandAt(0, value); |
| SetSuccessorAt(0, true_target); |
| SetSuccessorAt(1, false_target); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* value() { return OperandAt(0); } |
| }; |
| |
| |
| class HBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P2(HBranch, HValue*, |
| ToBooleanStub::Types); |
| DECLARE_INSTRUCTION_FACTORY_P4(HBranch, HValue*, |
| ToBooleanStub::Types, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE; |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE; |
| |
| ToBooleanStub::Types expected_input_types() const { |
| return expected_input_types_; |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Branch) |
| |
| private: |
| HBranch(HValue* value, |
| ToBooleanStub::Types expected_input_types = ToBooleanStub::Types(), |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target), |
| expected_input_types_(expected_input_types) { |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| |
| ToBooleanStub::Types expected_input_types_; |
| }; |
| |
| |
| class HCompareMap V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HCompareMap, HValue*, Handle<Map>); |
| DECLARE_INSTRUCTION_FACTORY_P4(HCompareMap, HValue*, Handle<Map>, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| Unique<Map> map() const { return map_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareMap) |
| |
| protected: |
| virtual int RedefinedOperandIndex() { return 0; } |
| |
| private: |
| HCompareMap(HValue* value, |
| Handle<Map> map, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target), |
| map_(Unique<Map>(map)) { |
| ASSERT(!map.is_null()); |
| } |
| |
| Unique<Map> map_; |
| }; |
| |
| |
| class HContext V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| static HContext* New(Zone* zone) { |
| return new(zone) HContext(); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Context) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HContext() { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HReturn V8_FINAL : public HTemplateControlInstruction<0, 3> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HReturn, HValue*, HValue*); |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(HReturn, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* value() { return OperandAt(0); } |
| HValue* context() { return OperandAt(1); } |
| HValue* parameter_count() { return OperandAt(2); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Return) |
| |
| private: |
| HReturn(HValue* context, HValue* value, HValue* parameter_count = 0) { |
| SetOperandAt(0, value); |
| SetOperandAt(1, context); |
| SetOperandAt(2, parameter_count); |
| } |
| }; |
| |
| |
| class HAbnormalExit V8_FINAL : public HTemplateControlInstruction<0, 0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P0(HAbnormalExit); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(AbnormalExit) |
| private: |
| HAbnormalExit() {} |
| }; |
| |
| |
| class HUnaryOperation : public HTemplateInstruction<1> { |
| public: |
| HUnaryOperation(HValue* value, HType type = HType::Tagged()) |
| : HTemplateInstruction<1>(type) { |
| SetOperandAt(0, value); |
| } |
| |
| static HUnaryOperation* cast(HValue* value) { |
| return reinterpret_cast<HUnaryOperation*>(value); |
| } |
| |
| HValue* value() const { return OperandAt(0); } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| }; |
| |
| |
| class HThrow V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(HThrow, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* value() { return OperandAt(1); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Throw) |
| |
| private: |
| HThrow(HValue* context, HValue* value) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, value); |
| SetAllSideEffects(); |
| } |
| }; |
| |
| |
| class HUseConst V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HUseConst, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(UseConst) |
| |
| private: |
| explicit HUseConst(HValue* old_value) : HUnaryOperation(old_value) { } |
| }; |
| |
| |
| class HForceRepresentation V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| static HInstruction* New(Zone* zone, HValue* context, HValue* value, |
| Representation required_representation); |
| |
| HValue* value() { return OperandAt(0); } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); // Same as the output representation. |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(ForceRepresentation) |
| |
| private: |
| HForceRepresentation(HValue* value, Representation required_representation) { |
| SetOperandAt(0, value); |
| set_representation(required_representation); |
| } |
| }; |
| |
| |
| class HChange V8_FINAL : public HUnaryOperation { |
| public: |
| HChange(HValue* value, |
| Representation to, |
| bool is_truncating_to_smi, |
| bool is_truncating_to_int32) |
| : HUnaryOperation(value) { |
| ASSERT(!value->representation().IsNone()); |
| ASSERT(!to.IsNone()); |
| ASSERT(!value->representation().Equals(to)); |
| set_representation(to); |
| SetFlag(kUseGVN); |
| if (is_truncating_to_smi) { |
| SetFlag(kTruncatingToSmi); |
| SetFlag(kTruncatingToInt32); |
| } |
| if (is_truncating_to_int32) SetFlag(kTruncatingToInt32); |
| if (value->representation().IsSmi() || value->type().IsSmi()) { |
| set_type(HType::Smi()); |
| } else { |
| set_type(HType::TaggedNumber()); |
| if (to.IsTagged()) SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| } |
| |
| bool can_convert_undefined_to_nan() { |
| return CheckUsesForFlag(kAllowUndefinedAsNaN); |
| } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| virtual HType CalculateInferredType() V8_OVERRIDE; |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| Representation from() const { return value()->representation(); } |
| Representation to() const { return representation(); } |
| bool deoptimize_on_minus_zero() const { |
| return CheckFlag(kBailoutOnMinusZero); |
| } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return from(); |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(Change) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return !from().IsTagged() || value()->type().IsSmi(); |
| } |
| }; |
| |
| |
| class HClampToUint8 V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HClampToUint8, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ClampToUint8) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HClampToUint8(HValue* value) |
| : HUnaryOperation(value) { |
| set_representation(Representation::Integer32()); |
| SetFlag(kAllowUndefinedAsNaN); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| enum RemovableSimulate { |
| REMOVABLE_SIMULATE, |
| FIXED_SIMULATE |
| }; |
| |
| |
| class HSimulate V8_FINAL : public HInstruction { |
| public: |
| HSimulate(BailoutId ast_id, |
| int pop_count, |
| Zone* zone, |
| RemovableSimulate removable) |
| : ast_id_(ast_id), |
| pop_count_(pop_count), |
| values_(2, zone), |
| assigned_indexes_(2, zone), |
| zone_(zone), |
| removable_(removable) {} |
| ~HSimulate() {} |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| bool HasAstId() const { return !ast_id_.IsNone(); } |
| BailoutId ast_id() const { return ast_id_; } |
| void set_ast_id(BailoutId id) { |
| ASSERT(!HasAstId()); |
| ast_id_ = id; |
| } |
| |
| int pop_count() const { return pop_count_; } |
| const ZoneList<HValue*>* values() const { return &values_; } |
| int GetAssignedIndexAt(int index) const { |
| ASSERT(HasAssignedIndexAt(index)); |
| return assigned_indexes_[index]; |
| } |
| bool HasAssignedIndexAt(int index) const { |
| return assigned_indexes_[index] != kNoIndex; |
| } |
| void AddAssignedValue(int index, HValue* value) { |
| AddValue(index, value); |
| } |
| void AddPushedValue(HValue* value) { |
| AddValue(kNoIndex, value); |
| } |
| int ToOperandIndex(int environment_index) { |
| for (int i = 0; i < assigned_indexes_.length(); ++i) { |
| if (assigned_indexes_[i] == environment_index) return i; |
| } |
| return -1; |
| } |
| virtual int OperandCount() V8_OVERRIDE { return values_.length(); } |
| virtual HValue* OperandAt(int index) const V8_OVERRIDE { |
| return values_[index]; |
| } |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { return false; } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| void MergeWith(ZoneList<HSimulate*>* list); |
| bool is_candidate_for_removal() { return removable_ == REMOVABLE_SIMULATE; } |
| |
| // Replay effects of this instruction on the given environment. |
| void ReplayEnvironment(HEnvironment* env); |
| |
| DECLARE_CONCRETE_INSTRUCTION(Simulate) |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE; |
| void set_closure(Handle<JSFunction> closure) { closure_ = closure; } |
| Handle<JSFunction> closure() const { return closure_; } |
| #endif |
| |
| protected: |
| virtual void InternalSetOperandAt(int index, HValue* value) V8_OVERRIDE { |
| values_[index] = value; |
| } |
| |
| private: |
| static const int kNoIndex = -1; |
| void AddValue(int index, HValue* value) { |
| assigned_indexes_.Add(index, zone_); |
| // Resize the list of pushed values. |
| values_.Add(NULL, zone_); |
| // Set the operand through the base method in HValue to make sure that the |
| // use lists are correctly updated. |
| SetOperandAt(values_.length() - 1, value); |
| } |
| bool HasValueForIndex(int index) { |
| for (int i = 0; i < assigned_indexes_.length(); ++i) { |
| if (assigned_indexes_[i] == index) return true; |
| } |
| return false; |
| } |
| BailoutId ast_id_; |
| int pop_count_; |
| ZoneList<HValue*> values_; |
| ZoneList<int> assigned_indexes_; |
| Zone* zone_; |
| RemovableSimulate removable_; |
| |
| #ifdef DEBUG |
| Handle<JSFunction> closure_; |
| #endif |
| }; |
| |
| |
| class HEnvironmentMarker V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| enum Kind { BIND, LOOKUP }; |
| |
| DECLARE_INSTRUCTION_FACTORY_P2(HEnvironmentMarker, Kind, int); |
| |
| Kind kind() { return kind_; } |
| int index() { return index_; } |
| HSimulate* next_simulate() { return next_simulate_; } |
| void set_next_simulate(HSimulate* simulate) { |
| next_simulate_ = simulate; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| #ifdef DEBUG |
| void set_closure(Handle<JSFunction> closure) { |
| ASSERT(closure_.is_null()); |
| ASSERT(!closure.is_null()); |
| closure_ = closure; |
| } |
| Handle<JSFunction> closure() const { return closure_; } |
| #endif |
| |
| DECLARE_CONCRETE_INSTRUCTION(EnvironmentMarker); |
| |
| private: |
| HEnvironmentMarker(Kind kind, int index) |
| : kind_(kind), index_(index), next_simulate_(NULL) { } |
| |
| Kind kind_; |
| int index_; |
| HSimulate* next_simulate_; |
| |
| #ifdef DEBUG |
| Handle<JSFunction> closure_; |
| #endif |
| }; |
| |
| |
| class HStackCheck V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| enum Type { |
| kFunctionEntry, |
| kBackwardsBranch |
| }; |
| |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(HStackCheck, Type); |
| |
| HValue* context() { return OperandAt(0); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| void Eliminate() { |
| // The stack check eliminator might try to eliminate the same stack |
| // check instruction multiple times. |
| if (IsLinked()) { |
| DeleteAndReplaceWith(NULL); |
| } |
| } |
| |
| bool is_function_entry() { return type_ == kFunctionEntry; } |
| bool is_backwards_branch() { return type_ == kBackwardsBranch; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StackCheck) |
| |
| private: |
| HStackCheck(HValue* context, Type type) : type_(type) { |
| SetOperandAt(0, context); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| Type type_; |
| }; |
| |
| |
| enum InliningKind { |
| NORMAL_RETURN, // Normal function/method call and return. |
| DROP_EXTRA_ON_RETURN, // Drop an extra value from the environment on return. |
| CONSTRUCT_CALL_RETURN, // Either use allocated receiver or return value. |
| GETTER_CALL_RETURN, // Returning from a getter, need to restore context. |
| SETTER_CALL_RETURN // Use the RHS of the assignment as the return value. |
| }; |
| |
| |
| class HArgumentsObject; |
| |
| |
| class HEnterInlined V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| static HEnterInlined* New(Zone* zone, |
| HValue* context, |
| Handle<JSFunction> closure, |
| int arguments_count, |
| FunctionLiteral* function, |
| InliningKind inlining_kind, |
| Variable* arguments_var, |
| HArgumentsObject* arguments_object, |
| bool undefined_receiver) { |
| return new(zone) HEnterInlined(closure, arguments_count, function, |
| inlining_kind, arguments_var, |
| arguments_object, undefined_receiver, zone); |
| } |
| |
| void RegisterReturnTarget(HBasicBlock* return_target, Zone* zone); |
| ZoneList<HBasicBlock*>* return_targets() { return &return_targets_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| Handle<JSFunction> closure() const { return closure_; } |
| int arguments_count() const { return arguments_count_; } |
| bool arguments_pushed() const { return arguments_pushed_; } |
| void set_arguments_pushed() { arguments_pushed_ = true; } |
| FunctionLiteral* function() const { return function_; } |
| InliningKind inlining_kind() const { return inlining_kind_; } |
| bool undefined_receiver() const { return undefined_receiver_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| Variable* arguments_var() { return arguments_var_; } |
| HArgumentsObject* arguments_object() { return arguments_object_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(EnterInlined) |
| |
| private: |
| HEnterInlined(Handle<JSFunction> closure, |
| int arguments_count, |
| FunctionLiteral* function, |
| InliningKind inlining_kind, |
| Variable* arguments_var, |
| HArgumentsObject* arguments_object, |
| bool undefined_receiver, |
| Zone* zone) |
| : closure_(closure), |
| arguments_count_(arguments_count), |
| arguments_pushed_(false), |
| function_(function), |
| inlining_kind_(inlining_kind), |
| arguments_var_(arguments_var), |
| arguments_object_(arguments_object), |
| undefined_receiver_(undefined_receiver), |
| return_targets_(2, zone) { |
| } |
| |
| Handle<JSFunction> closure_; |
| int arguments_count_; |
| bool arguments_pushed_; |
| FunctionLiteral* function_; |
| InliningKind inlining_kind_; |
| Variable* arguments_var_; |
| HArgumentsObject* arguments_object_; |
| bool undefined_receiver_; |
| ZoneList<HBasicBlock*> return_targets_; |
| }; |
| |
| |
| class HLeaveInlined V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| HLeaveInlined(HEnterInlined* entry, |
| int drop_count) |
| : entry_(entry), |
| drop_count_(drop_count) { } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual int argument_delta() const V8_OVERRIDE { |
| return entry_->arguments_pushed() ? -drop_count_ : 0; |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LeaveInlined) |
| |
| private: |
| HEnterInlined* entry_; |
| int drop_count_; |
| }; |
| |
| |
| class HPushArgument V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HPushArgument, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual int argument_delta() const V8_OVERRIDE { return 1; } |
| HValue* argument() { return OperandAt(0); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(PushArgument) |
| |
| private: |
| explicit HPushArgument(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Tagged()); |
| } |
| }; |
| |
| |
| class HThisFunction V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P0(HThisFunction); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ThisFunction) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HThisFunction() { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HOuterContext V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HOuterContext, HValue*); |
| |
| DECLARE_CONCRETE_INSTRUCTION(OuterContext); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HOuterContext(HValue* inner) : HUnaryOperation(inner) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HDeclareGlobals V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HDeclareGlobals, |
| Handle<FixedArray>, |
| int); |
| |
| HValue* context() { return OperandAt(0); } |
| Handle<FixedArray> pairs() const { return pairs_; } |
| int flags() const { return flags_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(DeclareGlobals) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| private: |
| HDeclareGlobals(HValue* context, |
| Handle<FixedArray> pairs, |
| int flags) |
| : HUnaryOperation(context), |
| pairs_(pairs), |
| flags_(flags) { |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Handle<FixedArray> pairs_; |
| int flags_; |
| }; |
| |
| |
| class HGlobalObject V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P0(HGlobalObject); |
| |
| DECLARE_CONCRETE_INSTRUCTION(GlobalObject) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HGlobalObject(HValue* context) : HUnaryOperation(context) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HGlobalReceiver V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HGlobalReceiver, HValue*); |
| |
| DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HGlobalReceiver(HValue* global_object) |
| : HUnaryOperation(global_object) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| template <int V> |
| class HCall : public HTemplateInstruction<V> { |
| public: |
| // The argument count includes the receiver. |
| explicit HCall<V>(int argument_count) : argument_count_(argument_count) { |
| this->set_representation(Representation::Tagged()); |
| this->SetAllSideEffects(); |
| } |
| |
| virtual HType CalculateInferredType() V8_FINAL V8_OVERRIDE { |
| return HType::Tagged(); |
| } |
| |
| virtual int argument_count() const { |
| return argument_count_; |
| } |
| |
| virtual int argument_delta() const V8_OVERRIDE { |
| return -argument_count(); |
| } |
| |
| virtual bool IsCall() V8_FINAL V8_OVERRIDE { return true; } |
| |
| private: |
| int argument_count_; |
| }; |
| |
| |
| class HUnaryCall : public HCall<1> { |
| public: |
| HUnaryCall(HValue* value, int argument_count) |
| : HCall<1>(argument_count) { |
| SetOperandAt(0, value); |
| } |
| |
| virtual Representation RequiredInputRepresentation( |
| int index) V8_FINAL V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* value() { return OperandAt(0); } |
| }; |
| |
| |
| class HBinaryCall : public HCall<2> { |
| public: |
| HBinaryCall(HValue* first, HValue* second, int argument_count) |
| : HCall<2>(argument_count) { |
| SetOperandAt(0, first); |
| SetOperandAt(1, second); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation( |
| int index) V8_FINAL V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* first() { return OperandAt(0); } |
| HValue* second() { return OperandAt(1); } |
| }; |
| |
| |
| class HInvokeFunction V8_FINAL : public HBinaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HInvokeFunction, HValue*, int); |
| |
| HInvokeFunction(HValue* context, |
| HValue* function, |
| Handle<JSFunction> known_function, |
| int argument_count) |
| : HBinaryCall(context, function, argument_count), |
| known_function_(known_function) { |
| formal_parameter_count_ = known_function.is_null() |
| ? 0 : known_function->shared()->formal_parameter_count(); |
| } |
| |
| static HInvokeFunction* New(Zone* zone, |
| HValue* context, |
| HValue* function, |
| Handle<JSFunction> known_function, |
| int argument_count) { |
| return new(zone) HInvokeFunction(context, function, |
| known_function, argument_count); |
| } |
| |
| HValue* context() { return first(); } |
| HValue* function() { return second(); } |
| Handle<JSFunction> known_function() { return known_function_; } |
| int formal_parameter_count() const { return formal_parameter_count_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(InvokeFunction) |
| |
| private: |
| HInvokeFunction(HValue* context, HValue* function, int argument_count) |
| : HBinaryCall(context, function, argument_count) { |
| } |
| |
| Handle<JSFunction> known_function_; |
| int formal_parameter_count_; |
| }; |
| |
| |
| class HCallConstantFunction V8_FINAL : public HCall<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HCallConstantFunction, |
| Handle<JSFunction>, |
| int); |
| |
| Handle<JSFunction> function() const { return function_; } |
| int formal_parameter_count() const { return formal_parameter_count_; } |
| |
| bool IsApplyFunction() const { |
| return function_->code() == |
| function_->GetIsolate()->builtins()->builtin(Builtins::kFunctionApply); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallConstantFunction) |
| |
| private: |
| HCallConstantFunction(Handle<JSFunction> function, int argument_count) |
| : HCall<0>(argument_count), |
| function_(function), |
| formal_parameter_count_(function->shared()->formal_parameter_count()) {} |
| |
| Handle<JSFunction> function_; |
| int formal_parameter_count_; |
| }; |
| |
| |
| class HCallKeyed V8_FINAL : public HBinaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallKeyed, HValue*, int); |
| |
| HValue* context() { return first(); } |
| HValue* key() { return second(); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallKeyed) |
| |
| private: |
| HCallKeyed(HValue* context, HValue* key, int argument_count) |
| : HBinaryCall(context, key, argument_count) { |
| } |
| }; |
| |
| |
| class HCallNamed V8_FINAL : public HUnaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallNamed, Handle<String>, int); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* context() { return value(); } |
| Handle<String> name() const { return name_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallNamed) |
| |
| private: |
| HCallNamed(HValue* context, Handle<String> name, int argument_count) |
| : HUnaryCall(context, argument_count), name_(name) { |
| } |
| |
| Handle<String> name_; |
| }; |
| |
| |
| enum CallMode { |
| NORMAL_CALL, |
| TAIL_CALL |
| }; |
| |
| |
| class HCallFunction V8_FINAL : public HBinaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallFunction, HValue*, int); |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3( |
| HCallFunction, HValue*, int, CallMode); |
| |
| bool IsTailCall() const { return call_mode_ == TAIL_CALL; } |
| |
| HValue* context() { return first(); } |
| HValue* function() { return second(); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallFunction) |
| |
| virtual int argument_delta() const V8_OVERRIDE { |
| if (IsTailCall()) return 0; |
| return -argument_count(); |
| } |
| |
| private: |
| HCallFunction(HValue* context, |
| HValue* function, |
| int argument_count, |
| CallMode mode = NORMAL_CALL) |
| : HBinaryCall(context, function, argument_count), call_mode_(mode) { |
| } |
| CallMode call_mode_; |
| }; |
| |
| |
| class HCallGlobal V8_FINAL : public HUnaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallGlobal, Handle<String>, int); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* context() { return value(); } |
| Handle<String> name() const { return name_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallGlobal) |
| |
| private: |
| HCallGlobal(HValue* context, Handle<String> name, int argument_count) |
| : HUnaryCall(context, argument_count), name_(name) { |
| } |
| |
| Handle<String> name_; |
| }; |
| |
| |
| class HCallKnownGlobal V8_FINAL : public HCall<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HCallKnownGlobal, Handle<JSFunction>, int); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| Handle<JSFunction> target() const { return target_; } |
| int formal_parameter_count() const { return formal_parameter_count_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallKnownGlobal) |
| |
| private: |
| HCallKnownGlobal(Handle<JSFunction> target, int argument_count) |
| : HCall<0>(argument_count), |
| target_(target), |
| formal_parameter_count_(target->shared()->formal_parameter_count()) { } |
| |
| Handle<JSFunction> target_; |
| int formal_parameter_count_; |
| }; |
| |
| |
| class HCallNew V8_FINAL : public HBinaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallNew, HValue*, int); |
| |
| HValue* context() { return first(); } |
| HValue* constructor() { return second(); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallNew) |
| |
| private: |
| HCallNew(HValue* context, HValue* constructor, int argument_count) |
| : HBinaryCall(context, constructor, argument_count) {} |
| }; |
| |
| |
| class HCallNewArray V8_FINAL : public HBinaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HCallNewArray, |
| HValue*, |
| int, |
| Handle<Cell>, |
| ElementsKind); |
| |
| HValue* context() { return first(); } |
| HValue* constructor() { return second(); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| Handle<Cell> property_cell() const { |
| return type_cell_; |
| } |
| |
| ElementsKind elements_kind() const { return elements_kind_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallNewArray) |
| |
| private: |
| HCallNewArray(HValue* context, HValue* constructor, int argument_count, |
| Handle<Cell> type_cell, ElementsKind elements_kind) |
| : HBinaryCall(context, constructor, argument_count), |
| elements_kind_(elements_kind), |
| type_cell_(type_cell) {} |
| |
| ElementsKind elements_kind_; |
| Handle<Cell> type_cell_; |
| }; |
| |
| |
| class HCallRuntime V8_FINAL : public HCall<1> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HCallRuntime, |
| Handle<String>, |
| const Runtime::Function*, |
| int); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* context() { return OperandAt(0); } |
| const Runtime::Function* function() const { return c_function_; } |
| Handle<String> name() const { return name_; } |
| SaveFPRegsMode save_doubles() const { return save_doubles_; } |
| void set_save_doubles(SaveFPRegsMode save_doubles) { |
| save_doubles_ = save_doubles; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallRuntime) |
| |
| private: |
| HCallRuntime(HValue* context, |
| Handle<String> name, |
| const Runtime::Function* c_function, |
| int argument_count) |
| : HCall<1>(argument_count), c_function_(c_function), name_(name), |
| save_doubles_(kDontSaveFPRegs) { |
| SetOperandAt(0, context); |
| } |
| |
| const Runtime::Function* c_function_; |
| Handle<String> name_; |
| SaveFPRegsMode save_doubles_; |
| }; |
| |
| |
| class HMapEnumLength V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HMapEnumLength, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(MapEnumLength) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HMapEnumLength(HValue* value) |
| : HUnaryOperation(value, HType::Smi()) { |
| set_representation(Representation::Smi()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnMaps); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HElementsKind V8_FINAL : public HUnaryOperation { |
| public: |
| explicit HElementsKind(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Integer32()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnElementsKind); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ElementsKind) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HUnaryMathOperation V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* value, |
| BuiltinFunctionId op); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* value() { return OperandAt(1); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| if (index == 0) { |
| return Representation::Tagged(); |
| } else { |
| switch (op_) { |
| case kMathFloor: |
| case kMathRound: |
| case kMathSqrt: |
| case kMathPowHalf: |
| case kMathLog: |
| case kMathExp: |
| return Representation::Double(); |
| case kMathAbs: |
| return representation(); |
| default: |
| UNREACHABLE(); |
| return Representation::None(); |
| } |
| } |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| virtual Representation RepresentationFromInputs() V8_OVERRIDE; |
| |
| BuiltinFunctionId op() const { return op_; } |
| const char* OpName() const; |
| |
| DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HUnaryMathOperation* b = HUnaryMathOperation::cast(other); |
| return op_ == b->op(); |
| } |
| |
| private: |
| HUnaryMathOperation(HValue* context, HValue* value, BuiltinFunctionId op) |
| : HTemplateInstruction<2>(HType::TaggedNumber()), op_(op) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, value); |
| switch (op) { |
| case kMathFloor: |
| case kMathRound: |
| set_representation(Representation::Integer32()); |
| break; |
| case kMathAbs: |
| // Not setting representation here: it is None intentionally. |
| SetFlag(kFlexibleRepresentation); |
| // TODO(svenpanne) This flag is actually only needed if representation() |
| // is tagged, and not when it is an unboxed double or unboxed integer. |
| SetGVNFlag(kChangesNewSpacePromotion); |
| break; |
| case kMathLog: |
| case kMathExp: |
| case kMathSqrt: |
| case kMathPowHalf: |
| set_representation(Representation::Double()); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| SetFlag(kUseGVN); |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| BuiltinFunctionId op_; |
| }; |
| |
| |
| class HLoadRoot V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HLoadRoot, Heap::RootListIndex); |
| DECLARE_INSTRUCTION_FACTORY_P2(HLoadRoot, Heap::RootListIndex, HType); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| Heap::RootListIndex index() const { return index_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadRoot) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HLoadRoot* b = HLoadRoot::cast(other); |
| return index_ == b->index_; |
| } |
| |
| private: |
| HLoadRoot(Heap::RootListIndex index, HType type = HType::Tagged()) |
| : HTemplateInstruction<0>(type), index_(index) { |
| SetFlag(kUseGVN); |
| // TODO(bmeurer): We'll need kDependsOnRoots once we add the |
| // corresponding HStoreRoot instruction. |
| SetGVNFlag(kDependsOnCalls); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| const Heap::RootListIndex index_; |
| }; |
| |
| |
| class HLoadExternalArrayPointer V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HLoadExternalArrayPointer, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual HType CalculateInferredType() V8_OVERRIDE { |
| return HType::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadExternalArrayPointer) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HLoadExternalArrayPointer(HValue* value) |
| : HUnaryOperation(value) { |
| set_representation(Representation::External()); |
| // The result of this instruction is idempotent as long as its inputs don't |
| // change. The external array of a specialized array elements object cannot |
| // change once set, so it's no necessary to introduce any additional |
| // dependencies on top of the inputs. |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HCheckMaps V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HCheckMaps* New(Zone* zone, HValue* context, HValue* value, |
| Handle<Map> map, CompilationInfo* info, |
| HValue *typecheck = NULL); |
| static HCheckMaps* New(Zone* zone, HValue* context, |
| HValue* value, SmallMapList* maps, |
| HValue *typecheck = NULL) { |
| HCheckMaps* check_map = new(zone) HCheckMaps(value, zone, typecheck); |
| for (int i = 0; i < maps->length(); i++) { |
| check_map->Add(maps->at(i), zone); |
| } |
| return check_map; |
| } |
| |
| bool CanOmitMapChecks() { return omit_; } |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { return false; } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| virtual void HandleSideEffectDominator(GVNFlag side_effect, |
| HValue* dominator) V8_OVERRIDE; |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| HValue* value() { return OperandAt(0); } |
| |
| Unique<Map> first_map() const { return map_set_.at(0); } |
| UniqueSet<Map> map_set() const { return map_set_; } |
| |
| bool has_migration_target() const { |
| return has_migration_target_; |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckMaps) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return this->map_set_.Equals(&HCheckMaps::cast(other)->map_set_); |
| } |
| |
| virtual int RedefinedOperandIndex() { return 0; } |
| |
| private: |
| void Add(Handle<Map> map, Zone* zone) { |
| map_set_.Add(Unique<Map>(map), zone); |
| if (!has_migration_target_ && map->is_migration_target()) { |
| has_migration_target_ = true; |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| } |
| |
| // Clients should use one of the static New* methods above. |
| HCheckMaps(HValue* value, Zone *zone, HValue* typecheck) |
| : HTemplateInstruction<2>(value->type()), |
| omit_(false), has_migration_target_(false) { |
| SetOperandAt(0, value); |
| // Use the object value for the dependency if NULL is passed. |
| SetOperandAt(1, typecheck != NULL ? typecheck : value); |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetFlag(kTrackSideEffectDominators); |
| SetGVNFlag(kDependsOnMaps); |
| SetGVNFlag(kDependsOnElementsKind); |
| } |
| |
| bool omit_; |
| bool has_migration_target_; |
| UniqueSet<Map> map_set_; |
| }; |
| |
| |
| class HCheckValue V8_FINAL : public HUnaryOperation { |
| public: |
| static HCheckValue* New(Zone* zone, HValue* context, |
| HValue* value, Handle<JSFunction> func) { |
| bool in_new_space = zone->isolate()->heap()->InNewSpace(*func); |
| // NOTE: We create an uninitialized Unique and initialize it later. |
| // This is because a JSFunction can move due to GC during graph creation. |
| // TODO(titzer): This is a migration crutch. Replace with some kind of |
| // Uniqueness scope later. |
| Unique<JSFunction> target = Unique<JSFunction>::CreateUninitialized(func); |
| HCheckValue* check = new(zone) HCheckValue(value, target, in_new_space); |
| return check; |
| } |
| static HCheckValue* New(Zone* zone, HValue* context, |
| HValue* value, Unique<HeapObject> target, |
| bool object_in_new_space) { |
| return new(zone) HCheckValue(value, target, object_in_new_space); |
| } |
| |
| virtual void FinalizeUniqueness() V8_OVERRIDE { |
| object_ = Unique<HeapObject>(object_.handle()); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE; |
| #endif |
| |
| Unique<HeapObject> object() const { return object_; } |
| bool object_in_new_space() const { return object_in_new_space_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckValue) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HCheckValue* b = HCheckValue::cast(other); |
| return object_ == b->object_; |
| } |
| |
| private: |
| HCheckValue(HValue* value, Unique<HeapObject> object, |
| bool object_in_new_space) |
| : HUnaryOperation(value, value->type()), |
| object_(object), |
| object_in_new_space_(object_in_new_space) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| Unique<HeapObject> object_; |
| bool object_in_new_space_; |
| }; |
| |
| |
| class HCheckInstanceType V8_FINAL : public HUnaryOperation { |
| public: |
| enum Check { |
| IS_SPEC_OBJECT, |
| IS_JS_ARRAY, |
| IS_STRING, |
| IS_INTERNALIZED_STRING, |
| LAST_INTERVAL_CHECK = IS_JS_ARRAY |
| }; |
| |
| DECLARE_INSTRUCTION_FACTORY_P2(HCheckInstanceType, HValue*, Check); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| bool is_interval_check() const { return check_ <= LAST_INTERVAL_CHECK; } |
| void GetCheckInterval(InstanceType* first, InstanceType* last); |
| void GetCheckMaskAndTag(uint8_t* mask, uint8_t* tag); |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType) |
| |
| protected: |
| // TODO(ager): It could be nice to allow the ommision of instance |
| // type checks if we have already performed an instance type check |
| // with a larger range. |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HCheckInstanceType* b = HCheckInstanceType::cast(other); |
| return check_ == b->check_; |
| } |
| |
| virtual int RedefinedOperandIndex() { return 0; } |
| |
| private: |
| const char* GetCheckName(); |
| |
| HCheckInstanceType(HValue* value, Check check) |
| : HUnaryOperation(value), check_(check) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| const Check check_; |
| }; |
| |
| |
| class HCheckSmi V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HCheckSmi, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE { |
| HType value_type = value()->type(); |
| if (value_type.IsSmi()) { |
| return NULL; |
| } |
| return this; |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckSmi) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HCheckSmi(HValue* value) : HUnaryOperation(value, HType::Smi()) { |
| set_representation(Representation::Smi()); |
| SetFlag(kUseGVN); |
| } |
| }; |
| |
| |
| class HCheckHeapObject V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HCheckHeapObject, HValue*); |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { return false; } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE; |
| #endif |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE { |
| return value()->type().IsHeapObject() ? NULL : this; |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckHeapObject) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HCheckHeapObject(HValue* value) |
| : HUnaryOperation(value, HType::NonPrimitive()) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| }; |
| |
| |
| class InductionVariableData; |
| |
| |
| struct InductionVariableLimitUpdate { |
| InductionVariableData* updated_variable; |
| HValue* limit; |
| bool limit_is_upper; |
| bool limit_is_included; |
| |
| InductionVariableLimitUpdate() |
| : updated_variable(NULL), limit(NULL), |
| limit_is_upper(false), limit_is_included(false) {} |
| }; |
| |
| |
| class HBoundsCheck; |
| class HPhi; |
| class HConstant; |
| class HBitwise; |
| |
| |
| class InductionVariableData V8_FINAL : public ZoneObject { |
| public: |
| class InductionVariableCheck : public ZoneObject { |
| public: |
| HBoundsCheck* check() { return check_; } |
| InductionVariableCheck* next() { return next_; } |
| bool HasUpperLimit() { return upper_limit_ >= 0; } |
| int32_t upper_limit() { |
| ASSERT(HasUpperLimit()); |
| return upper_limit_; |
| } |
| void set_upper_limit(int32_t upper_limit) { |
| upper_limit_ = upper_limit; |
| } |
| |
| bool processed() { return processed_; } |
| void set_processed() { processed_ = true; } |
| |
| InductionVariableCheck(HBoundsCheck* check, |
| InductionVariableCheck* next, |
| int32_t upper_limit = kNoLimit) |
| : check_(check), next_(next), upper_limit_(upper_limit), |
| processed_(false) {} |
| |
| private: |
| HBoundsCheck* check_; |
| InductionVariableCheck* next_; |
| int32_t upper_limit_; |
| bool processed_; |
| }; |
| |
| class ChecksRelatedToLength : public ZoneObject { |
| public: |
| HValue* length() { return length_; } |
| ChecksRelatedToLength* next() { return next_; } |
| InductionVariableCheck* checks() { return checks_; } |
| |
| void AddCheck(HBoundsCheck* check, int32_t upper_limit = kNoLimit); |
| void CloseCurrentBlock(); |
| |
| ChecksRelatedToLength(HValue* length, ChecksRelatedToLength* next) |
| : length_(length), next_(next), checks_(NULL), |
| first_check_in_block_(NULL), |
| added_index_(NULL), |
| added_constant_(NULL), |
| current_and_mask_in_block_(0), |
| current_or_mask_in_block_(0) {} |
| |
| private: |
| void UseNewIndexInCurrentBlock(Token::Value token, |
| int32_t mask, |
| HValue* index_base, |
| HValue* context); |
| |
| HBoundsCheck* first_check_in_block() { return first_check_in_block_; } |
| HBitwise* added_index() { return added_index_; } |
| void set_added_index(HBitwise* index) { added_index_ = index; } |
| HConstant* added_constant() { return added_constant_; } |
| void set_added_constant(HConstant* constant) { added_constant_ = constant; } |
| int32_t current_and_mask_in_block() { return current_and_mask_in_block_; } |
| int32_t current_or_mask_in_block() { return current_or_mask_in_block_; } |
| int32_t current_upper_limit() { return current_upper_limit_; } |
| |
| HValue* length_; |
| ChecksRelatedToLength* next_; |
| InductionVariableCheck* checks_; |
| |
| HBoundsCheck* first_check_in_block_; |
| HBitwise* added_index_; |
| HConstant* added_constant_; |
| int32_t current_and_mask_in_block_; |
| int32_t current_or_mask_in_block_; |
| int32_t current_upper_limit_; |
| }; |
| |
| struct LimitFromPredecessorBlock { |
| InductionVariableData* variable; |
| Token::Value token; |
| HValue* limit; |
| HBasicBlock* other_target; |
| |
| bool LimitIsValid() { return token != Token::ILLEGAL; } |
| |
| bool LimitIsIncluded() { |
| return Token::IsEqualityOp(token) || |
| token == Token::GTE || token == Token::LTE; |
| } |
| bool LimitIsUpper() { |
| return token == Token::LTE || token == Token::LT || token == Token::NE; |
| } |
| |
| LimitFromPredecessorBlock() |
| : variable(NULL), |
| token(Token::ILLEGAL), |
| limit(NULL), |
| other_target(NULL) {} |
| }; |
| |
| static const int32_t kNoLimit = -1; |
| |
| static InductionVariableData* ExaminePhi(HPhi* phi); |
| static void ComputeLimitFromPredecessorBlock( |
| HBasicBlock* block, |
| LimitFromPredecessorBlock* result); |
| static bool ComputeInductionVariableLimit( |
| HBasicBlock* block, |
| InductionVariableLimitUpdate* additional_limit); |
| |
| struct BitwiseDecompositionResult { |
| HValue* base; |
| int32_t and_mask; |
| int32_t or_mask; |
| HValue* context; |
| |
| BitwiseDecompositionResult() |
| : base(NULL), and_mask(0), or_mask(0), context(NULL) {} |
| }; |
| static void DecomposeBitwise(HValue* value, |
| BitwiseDecompositionResult* result); |
| |
| void AddCheck(HBoundsCheck* check, int32_t upper_limit = kNoLimit); |
| |
| bool CheckIfBranchIsLoopGuard(Token::Value token, |
| HBasicBlock* current_branch, |
| HBasicBlock* other_branch); |
| |
| void UpdateAdditionalLimit(InductionVariableLimitUpdate* update); |
| |
| HPhi* phi() { return phi_; } |
| HValue* base() { return base_; } |
| int32_t increment() { return increment_; } |
| HValue* limit() { return limit_; } |
| bool limit_included() { return limit_included_; } |
| HBasicBlock* limit_validity() { return limit_validity_; } |
| HBasicBlock* induction_exit_block() { return induction_exit_block_; } |
| HBasicBlock* induction_exit_target() { return induction_exit_target_; } |
| ChecksRelatedToLength* checks() { return checks_; } |
| HValue* additional_upper_limit() { return additional_upper_limit_; } |
| bool additional_upper_limit_is_included() { |
| return additional_upper_limit_is_included_; |
| } |
| HValue* additional_lower_limit() { return additional_lower_limit_; } |
| bool additional_lower_limit_is_included() { |
| return additional_lower_limit_is_included_; |
| } |
| |
| bool LowerLimitIsNonNegativeConstant() { |
| if (base()->IsInteger32Constant() && base()->GetInteger32Constant() >= 0) { |
| return true; |
| } |
| if (additional_lower_limit() != NULL && |
| additional_lower_limit()->IsInteger32Constant() && |
| additional_lower_limit()->GetInteger32Constant() >= 0) { |
| // Ignoring the corner case of !additional_lower_limit_is_included() |
| // is safe, handling it adds unneeded complexity. |
| return true; |
| } |
| return false; |
| } |
| |
| int32_t ComputeUpperLimit(int32_t and_mask, int32_t or_mask); |
| |
| private: |
| template <class T> void swap(T* a, T* b) { |
| T c(*a); |
| *a = *b; |
| *b = c; |
| } |
| |
| InductionVariableData(HPhi* phi, HValue* base, int32_t increment) |
| : phi_(phi), base_(IgnoreOsrValue(base)), increment_(increment), |
| limit_(NULL), limit_included_(false), limit_validity_(NULL), |
| induction_exit_block_(NULL), induction_exit_target_(NULL), |
| checks_(NULL), |
| additional_upper_limit_(NULL), |
| additional_upper_limit_is_included_(false), |
| additional_lower_limit_(NULL), |
| additional_lower_limit_is_included_(false) {} |
| |
| static int32_t ComputeIncrement(HPhi* phi, HValue* phi_operand); |
| |
| static HValue* IgnoreOsrValue(HValue* v); |
| static InductionVariableData* GetInductionVariableData(HValue* v); |
| |
| HPhi* phi_; |
| HValue* base_; |
| int32_t increment_; |
| HValue* limit_; |
| bool limit_included_; |
| HBasicBlock* limit_validity_; |
| HBasicBlock* induction_exit_block_; |
| HBasicBlock* induction_exit_target_; |
| ChecksRelatedToLength* checks_; |
| HValue* additional_upper_limit_; |
| bool additional_upper_limit_is_included_; |
| HValue* additional_lower_limit_; |
| bool additional_lower_limit_is_included_; |
| }; |
| |
| |
| class HPhi V8_FINAL : public HValue { |
| public: |
| HPhi(int merged_index, Zone* zone) |
| : inputs_(2, zone), |
| merged_index_(merged_index), |
| phi_id_(-1), |
| induction_variable_data_(NULL) { |
| for (int i = 0; i < Representation::kNumRepresentations; i++) { |
| non_phi_uses_[i] = 0; |
| indirect_uses_[i] = 0; |
| } |
| ASSERT(merged_index >= 0 || merged_index == kInvalidMergedIndex); |
| SetFlag(kFlexibleRepresentation); |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| |
| virtual Representation RepresentationFromInputs() V8_OVERRIDE; |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| virtual Representation KnownOptimalRepresentation() V8_OVERRIDE { |
| return representation(); |
| } |
| virtual HType CalculateInferredType() V8_OVERRIDE; |
| virtual int OperandCount() V8_OVERRIDE { return inputs_.length(); } |
| virtual HValue* OperandAt(int index) const V8_OVERRIDE { |
| return inputs_[index]; |
| } |
| HValue* GetRedundantReplacement(); |
| void AddInput(HValue* value); |
| bool HasRealUses(); |
| |
| bool IsReceiver() const { return merged_index_ == 0; } |
| bool HasMergedIndex() const { return merged_index_ != kInvalidMergedIndex; } |
| |
| virtual int position() const V8_OVERRIDE; |
| |
| int merged_index() const { return merged_index_; } |
| |
| InductionVariableData* induction_variable_data() { |
| return induction_variable_data_; |
| } |
| bool IsInductionVariable() { |
| return induction_variable_data_ != NULL; |
| } |
| bool IsLimitedInductionVariable() { |
| return IsInductionVariable() && |
| induction_variable_data_->limit() != NULL; |
| } |
| void DetectInductionVariable() { |
| ASSERT(induction_variable_data_ == NULL); |
| induction_variable_data_ = InductionVariableData::ExaminePhi(this); |
| } |
| |
| virtual void PrintTo(StringStream* stream) V8_OVERRIDE; |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE; |
| #endif |
| |
| void InitRealUses(int id); |
| void AddNonPhiUsesFrom(HPhi* other); |
| void AddIndirectUsesTo(int* use_count); |
| |
| int tagged_non_phi_uses() const { |
| return non_phi_uses_[Representation::kTagged]; |
| } |
| int smi_non_phi_uses() const { |
| return non_phi_uses_[Representation::kSmi]; |
| } |
| int int32_non_phi_uses() const { |
| return non_phi_uses_[Representation::kInteger32]; |
| } |
| int double_non_phi_uses() const { |
| return non_phi_uses_[Representation::kDouble]; |
| } |
| int tagged_indirect_uses() const { |
| return indirect_uses_[Representation::kTagged]; |
| } |
| int smi_indirect_uses() const { |
| return indirect_uses_[Representation::kSmi]; |
| } |
| int int32_indirect_uses() const { |
| return indirect_uses_[Representation::kInteger32]; |
| } |
| int double_indirect_uses() const { |
| return indirect_uses_[Representation::kDouble]; |
| } |
| int phi_id() { return phi_id_; } |
| |
| static HPhi* cast(HValue* value) { |
| ASSERT(value->IsPhi()); |
| return reinterpret_cast<HPhi*>(value); |
| } |
| virtual Opcode opcode() const V8_OVERRIDE { return HValue::kPhi; } |
| |
| void SimplifyConstantInputs(); |
| |
| // Marker value representing an invalid merge index. |
| static const int kInvalidMergedIndex = -1; |
| |
| protected: |
| virtual void DeleteFromGraph() V8_OVERRIDE; |
| virtual void InternalSetOperandAt(int index, HValue* value) V8_OVERRIDE { |
| inputs_[index] = value; |
| } |
| |
| private: |
| ZoneList<HValue*> inputs_; |
| int merged_index_; |
| |
| int non_phi_uses_[Representation::kNumRepresentations]; |
| int indirect_uses_[Representation::kNumRepresentations]; |
| int phi_id_; |
| InductionVariableData* induction_variable_data_; |
| |
| // TODO(titzer): we can't eliminate the receiver for generating backtraces |
| virtual bool IsDeletable() const V8_OVERRIDE { return !IsReceiver(); } |
| }; |
| |
| |
| // Common base class for HArgumentsObject and HCapturedObject. |
| class HDematerializedObject : public HInstruction { |
| public: |
| HDematerializedObject(int count, Zone* zone) : values_(count, zone) {} |
| |
| virtual int OperandCount() V8_FINAL V8_OVERRIDE { return values_.length(); } |
| virtual HValue* OperandAt(int index) const V8_FINAL V8_OVERRIDE { |
| return values_[index]; |
| } |
| |
| virtual bool HasEscapingOperandAt(int index) V8_FINAL V8_OVERRIDE { |
| return false; |
| } |
| virtual Representation RequiredInputRepresentation( |
| int index) V8_FINAL V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| protected: |
| virtual void InternalSetOperandAt(int index, |
| HValue* value) V8_FINAL V8_OVERRIDE { |
| values_[index] = value; |
| } |
| |
| // List of values tracked by this marker. |
| ZoneList<HValue*> values_; |
| }; |
| |
| |
| class HArgumentsObject V8_FINAL : public HDematerializedObject { |
| public: |
| static HArgumentsObject* New(Zone* zone, HValue* context, int count) { |
| return new(zone) HArgumentsObject(count, zone); |
| } |
| |
| // The values contain a list of all elements in the arguments object |
| // including the receiver object, which is skipped when materializing. |
| const ZoneList<HValue*>* arguments_values() const { return &values_; } |
| int arguments_count() const { return values_.length(); } |
| |
| void AddArgument(HValue* argument, Zone* zone) { |
| values_.Add(NULL, zone); // Resize list. |
| SetOperandAt(values_.length() - 1, argument); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ArgumentsObject) |
| |
| private: |
| HArgumentsObject(int count, Zone* zone) |
| : HDematerializedObject(count, zone) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kIsArguments); |
| } |
| |
| virtual bool IsDeletable() const V8_FINAL V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HCapturedObject V8_FINAL : public HDematerializedObject { |
| public: |
| HCapturedObject(int length, int id, Zone* zone) |
| : HDematerializedObject(length, zone), capture_id_(id) { |
| set_representation(Representation::Tagged()); |
| values_.AddBlock(NULL, length, zone); // Resize list. |
| } |
| |
| // The values contain a list of all in-object properties inside the |
| // captured object and is index by field index. Properties in the |
| // properties or elements backing store are not tracked here. |
| const ZoneList<HValue*>* values() const { return &values_; } |
| int length() const { return values_.length(); } |
| int capture_id() const { return capture_id_; } |
| |
| // Shortcut for the map value of this captured object. |
| HValue* map_value() const { return values()->first(); } |
| |
| void ReuseSideEffectsFromStore(HInstruction* store) { |
| ASSERT(store->HasObservableSideEffects()); |
| ASSERT(store->IsStoreNamedField()); |
| gvn_flags_.Add(store->gvn_flags()); |
| } |
| |
| // Replay effects of this instruction on the given environment. |
| void ReplayEnvironment(HEnvironment* env); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(CapturedObject) |
| |
| private: |
| int capture_id_; |
| |
| // Note that we cannot DCE captured objects as they are used to replay |
| // the environment. This method is here as an explicit reminder. |
| // TODO(mstarzinger): Turn HSimulates into full snapshots maybe? |
| virtual bool IsDeletable() const V8_FINAL V8_OVERRIDE { return false; } |
| }; |
| |
| |
| class HConstant V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HConstant, int32_t); |
| DECLARE_INSTRUCTION_FACTORY_P2(HConstant, int32_t, Representation); |
| DECLARE_INSTRUCTION_FACTORY_P1(HConstant, double); |
| DECLARE_INSTRUCTION_FACTORY_P1(HConstant, Handle<Object>); |
| DECLARE_INSTRUCTION_FACTORY_P1(HConstant, ExternalReference); |
| |
| static HConstant* CreateAndInsertAfter(Zone* zone, |
| HValue* context, |
| int32_t value, |
| Representation representation, |
| HInstruction* instruction) { |
| HConstant* new_constant = |
| HConstant::New(zone, context, value, representation); |
| new_constant->InsertAfter(instruction); |
| return new_constant; |
| } |
| |
| static HConstant* CreateAndInsertBefore(Zone* zone, |
| HValue* context, |
| int32_t value, |
| Representation representation, |
| HInstruction* instruction) { |
| HConstant* new_constant = |
| HConstant::New(zone, context, value, representation); |
| new_constant->InsertBefore(instruction); |
| return new_constant; |
| } |
| |
| static HConstant* CreateAndInsertBefore(Zone* zone, |
| Unique<Object> unique, |
| bool is_not_in_new_space, |
| HInstruction* instruction) { |
| HConstant* new_constant = new(zone) HConstant(unique, |
| Representation::Tagged(), HType::Tagged(), false, is_not_in_new_space, |
| false, false); |
| new_constant->InsertBefore(instruction); |
| return new_constant; |
| } |
| |
| Handle<Object> handle(Isolate* isolate) { |
| if (object_.handle().is_null()) { |
| // Default arguments to is_not_in_new_space depend on this heap number |
| // to be tenured so that it's guaranteed not to be located in new space. |
| object_ = Unique<Object>::CreateUninitialized( |
| isolate->factory()->NewNumber(double_value_, TENURED)); |
| } |
| AllowDeferredHandleDereference smi_check; |
| ASSERT(has_int32_value_ || !object_.handle()->IsSmi()); |
| return object_.handle(); |
| } |
| |
| bool HasMap(Handle<Map> map) { |
| Handle<Object> constant_object = handle(map->GetIsolate()); |
| return constant_object->IsHeapObject() && |
| Handle<HeapObject>::cast(constant_object)->map() == *map; |
| } |
| |
| bool IsSpecialDouble() const { |
| return has_double_value_ && |
| (BitCast<int64_t>(double_value_) == BitCast<int64_t>(-0.0) || |
| FixedDoubleArray::is_the_hole_nan(double_value_) || |
| std::isnan(double_value_)); |
| } |
| |
| bool NotInNewSpace() const { |
| return is_not_in_new_space_; |
| } |
| |
| bool ImmortalImmovable() const { |
| if (has_int32_value_) { |
| return false; |
| } |
| if (has_double_value_) { |
| if (IsSpecialDouble()) { |
| return true; |
| } |
| return false; |
| } |
| if (has_external_reference_value_) { |
| return false; |
| } |
| |
| ASSERT(!object_.handle().is_null()); |
| Heap* heap = isolate()->heap(); |
| ASSERT(!object_.IsKnownGlobal(heap->minus_zero_value())); |
| ASSERT(!object_.IsKnownGlobal(heap->nan_value())); |
| return |
| object_.IsKnownGlobal(heap->undefined_value()) || |
| object_.IsKnownGlobal(heap->null_value()) || |
| object_.IsKnownGlobal(heap->true_value()) || |
| object_.IsKnownGlobal(heap->false_value()) || |
| object_.IsKnownGlobal(heap->the_hole_value()) || |
| object_.IsKnownGlobal(heap->empty_string()) || |
| object_.IsKnownGlobal(heap->empty_fixed_array()); |
| } |
| |
| bool IsCell() const { |
| return is_cell_; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual Representation KnownOptimalRepresentation() V8_OVERRIDE { |
| if (HasSmiValue() && SmiValuesAre31Bits()) return Representation::Smi(); |
| if (HasInteger32Value()) return Representation::Integer32(); |
| if (HasNumberValue()) return Representation::Double(); |
| if (HasExternalReferenceValue()) return Representation::External(); |
| return Representation::Tagged(); |
| } |
| |
| virtual bool EmitAtUses() V8_OVERRIDE; |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| HConstant* CopyToRepresentation(Representation r, Zone* zone) const; |
| Maybe<HConstant*> CopyToTruncatedInt32(Zone* zone); |
| Maybe<HConstant*> CopyToTruncatedNumber(Zone* zone); |
| bool HasInteger32Value() const { return has_int32_value_; } |
| int32_t Integer32Value() const { |
| ASSERT(HasInteger32Value()); |
| return int32_value_; |
| } |
| bool HasSmiValue() const { return has_smi_value_; } |
| bool HasDoubleValue() const { return has_double_value_; } |
| double DoubleValue() const { |
| ASSERT(HasDoubleValue()); |
| return double_value_; |
| } |
| bool IsTheHole() const { |
| if (HasDoubleValue() && FixedDoubleArray::is_the_hole_nan(double_value_)) { |
| return true; |
| } |
| return object_.IsKnownGlobal(isolate()->heap()->the_hole_value()); |
| } |
| bool HasNumberValue() const { return has_double_value_; } |
| int32_t NumberValueAsInteger32() const { |
| ASSERT(HasNumberValue()); |
| // Irrespective of whether a numeric HConstant can be safely |
| // represented as an int32, we store the (in some cases lossy) |
| // representation of the number in int32_value_. |
| return int32_value_; |
| } |
| bool HasStringValue() const { |
| if (has_double_value_ || has_int32_value_) return false; |
| ASSERT(!object_.handle().is_null()); |
| return type_.IsString(); |
| } |
| Handle<String> StringValue() const { |
| ASSERT(HasStringValue()); |
| return Handle<String>::cast(object_.handle()); |
| } |
| bool HasInternalizedStringValue() const { |
| return HasStringValue() && is_internalized_string_; |
| } |
| |
| bool HasExternalReferenceValue() const { |
| return has_external_reference_value_; |
| } |
| ExternalReference ExternalReferenceValue() const { |
| return external_reference_value_; |
| } |
| |
| bool HasBooleanValue() const { return type_.IsBoolean(); } |
| bool BooleanValue() const { return boolean_value_; } |
| |
| virtual intptr_t Hashcode() V8_OVERRIDE { |
| if (has_int32_value_) { |
| return static_cast<intptr_t>(int32_value_); |
| } else if (has_double_value_) { |
| return static_cast<intptr_t>(BitCast<int64_t>(double_value_)); |
| } else if (has_external_reference_value_) { |
| return reinterpret_cast<intptr_t>(external_reference_value_.address()); |
| } else { |
| ASSERT(!object_.handle().is_null()); |
| return object_.Hashcode(); |
| } |
| } |
| |
| virtual void FinalizeUniqueness() V8_OVERRIDE { |
| if (!has_double_value_ && !has_external_reference_value_) { |
| ASSERT(!object_.handle().is_null()); |
| object_ = Unique<Object>(object_.handle()); |
| } |
| } |
| |
| Unique<Object> GetUnique() const { |
| return object_; |
| } |
| |
| #ifdef DEBUG |
| virtual void Verify() V8_OVERRIDE { } |
| #endif |
| |
| DECLARE_CONCRETE_INSTRUCTION(Constant) |
| |
| protected: |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HConstant* other_constant = HConstant::cast(other); |
| if (has_int32_value_) { |
| return other_constant->has_int32_value_ && |
| int32_value_ == other_constant->int32_value_; |
| } else if (has_double_value_) { |
| return other_constant->has_double_value_ && |
| BitCast<int64_t>(double_value_) == |
| BitCast<int64_t>(other_constant->double_value_); |
| } else if (has_external_reference_value_) { |
| return other_constant->has_external_reference_value_ && |
| external_reference_value_ == |
| other_constant->external_reference_value_; |
| } else { |
| if (other_constant->has_int32_value_ || |
| other_constant->has_double_value_ || |
| other_constant->has_external_reference_value_) { |
| return false; |
| } |
| ASSERT(!object_.handle().is_null()); |
| return other_constant->object_ == object_; |
| } |
| } |
| |
| private: |
| friend class HGraph; |
| HConstant(Handle<Object> handle, Representation r = Representation::None()); |
| HConstant(int32_t value, |
| Representation r = Representation::None(), |
| bool is_not_in_new_space = true, |
| Unique<Object> optional = Unique<Object>(Handle<Object>::null())); |
| HConstant(double value, |
| Representation r = Representation::None(), |
| bool is_not_in_new_space = true, |
| Unique<Object> optional = Unique<Object>(Handle<Object>::null())); |
| HConstant(Unique<Object> unique, |
| Representation r, |
| HType type, |
| bool is_internalized_string, |
| bool is_not_in_new_space, |
| bool is_cell, |
| bool boolean_value); |
| |
| explicit HConstant(ExternalReference reference); |
| |
| void Initialize(Representation r); |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| // If this is a numerical constant, object_ either points to the |
| // HeapObject the constant originated from or is null. If the |
| // constant is non-numeric, object_ always points to a valid |
| // constant HeapObject. |
| Unique<Object> object_; |
| |
| // We store the HConstant in the most specific form safely possible. |
| // The two flags, has_int32_value_ and has_double_value_ tell us if |
| // int32_value_ and double_value_ hold valid, safe representations |
| // of the constant. has_int32_value_ implies has_double_value_ but |
| // not the converse. |
| bool has_smi_value_ : 1; |
| bool has_int32_value_ : 1; |
| bool has_double_value_ : 1; |
| bool has_external_reference_value_ : 1; |
| bool is_internalized_string_ : 1; // TODO(yangguo): make this part of HType. |
| bool is_not_in_new_space_ : 1; |
| bool is_cell_ : 1; |
| bool boolean_value_ : 1; |
| int32_t int32_value_; |
| double double_value_; |
| ExternalReference external_reference_value_; |
| }; |
| |
| |
| class HBinaryOperation : public HTemplateInstruction<3> { |
| public: |
| HBinaryOperation(HValue* context, HValue* left, HValue* right, |
| HType type = HType::Tagged()) |
| : HTemplateInstruction<3>(type), |
| observed_output_representation_(Representation::None()) { |
| ASSERT(left != NULL && right != NULL); |
| SetOperandAt(0, context); |
| SetOperandAt(1, left); |
| SetOperandAt(2, right); |
| observed_input_representation_[0] = Representation::None(); |
| observed_input_representation_[1] = Representation::None(); |
| } |
| |
| HValue* context() const { return OperandAt(0); } |
| HValue* left() const { return OperandAt(1); } |
| HValue* right() const { return OperandAt(2); } |
| |
| // True if switching left and right operands likely generates better code. |
| bool AreOperandsBetterSwitched() { |
| if (!IsCommutative()) return false; |
| |
| // Constant operands are better off on the right, they can be inlined in |
| // many situations on most platforms. |
| if (left()->IsConstant()) return true; |
| if (right()->IsConstant()) return false; |
| |
| // Otherwise, if there is only one use of the right operand, it would be |
| // better off on the left for platforms that only have 2-arg arithmetic |
| // ops (e.g ia32, x64) that clobber the left operand. |
| return right()->UseCount() == 1; |
| } |
| |
| HValue* BetterLeftOperand() { |
| return AreOperandsBetterSwitched() ? right() : left(); |
| } |
| |
| HValue* BetterRightOperand() { |
| return AreOperandsBetterSwitched() ? left() : right(); |
| } |
| |
| void set_observed_input_representation(int index, Representation rep) { |
| ASSERT(index >= 1 && index <= 2); |
| observed_input_representation_[index - 1] = rep; |
| } |
| |
| virtual void initialize_output_representation(Representation observed) { |
| observed_output_representation_ = observed; |
| } |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| if (index == 0) return Representation::Tagged(); |
| return observed_input_representation_[index - 1]; |
| } |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| Representation rep = !FLAG_smi_binop && new_rep.IsSmi() |
| ? Representation::Integer32() : new_rep; |
| HValue::UpdateRepresentation(rep, h_infer, reason); |
| } |
| |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| virtual Representation RepresentationFromInputs() V8_OVERRIDE; |
| Representation RepresentationFromOutput(); |
| virtual void AssumeRepresentation(Representation r) V8_OVERRIDE; |
| |
| virtual bool IsCommutative() const { return false; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| if (index == 0) return Representation::Tagged(); |
| return representation(); |
| } |
| |
| void SetOperandPositions(Zone* zone, int left_pos, int right_pos) { |
| set_operand_position(zone, 1, left_pos); |
| set_operand_position(zone, 2, right_pos); |
| } |
| |
| DECLARE_ABSTRACT_INSTRUCTION(BinaryOperation) |
| |
| private: |
| bool IgnoreObservedOutputRepresentation(Representation current_rep); |
| |
| Representation observed_input_representation_[2]; |
| Representation observed_output_representation_; |
| }; |
| |
| |
| class HWrapReceiver V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HWrapReceiver, HValue*, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* receiver() { return OperandAt(0); } |
| HValue* function() { return OperandAt(1); } |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(WrapReceiver) |
| |
| private: |
| HWrapReceiver(HValue* receiver, HValue* function) { |
| set_representation(Representation::Tagged()); |
| SetOperandAt(0, receiver); |
| SetOperandAt(1, function); |
| } |
| }; |
| |
| |
| class HApplyArguments V8_FINAL : public HTemplateInstruction<4> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P4(HApplyArguments, HValue*, HValue*, HValue*, |
| HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // The length is untagged, all other inputs are tagged. |
| return (index == 2) |
| ? Representation::Integer32() |
| : Representation::Tagged(); |
| } |
| |
| HValue* function() { return OperandAt(0); } |
| HValue* receiver() { return OperandAt(1); } |
| HValue* length() { return OperandAt(2); } |
| HValue* elements() { return OperandAt(3); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ApplyArguments) |
| |
| private: |
| HApplyArguments(HValue* function, |
| HValue* receiver, |
| HValue* length, |
| HValue* elements) { |
| set_representation(Representation::Tagged()); |
| SetOperandAt(0, function); |
| SetOperandAt(1, receiver); |
| SetOperandAt(2, length); |
| SetOperandAt(3, elements); |
| SetAllSideEffects(); |
| } |
| }; |
| |
| |
| class HArgumentsElements V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HArgumentsElements, bool); |
| |
| DECLARE_CONCRETE_INSTRUCTION(ArgumentsElements) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| bool from_inlined() const { return from_inlined_; } |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HArgumentsElements(bool from_inlined) : from_inlined_(from_inlined) { |
| // The value produced by this instruction is a pointer into the stack |
| // that looks as if it was a smi because of alignment. |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| bool from_inlined_; |
| }; |
| |
| |
| class HArgumentsLength V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HArgumentsLength, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HArgumentsLength(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Integer32()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HAccessArgumentsAt V8_FINAL : public HTemplateInstruction<3> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P3(HAccessArgumentsAt, HValue*, HValue*, HValue*); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // The arguments elements is considered tagged. |
| return index == 0 |
| ? Representation::Tagged() |
| : Representation::Integer32(); |
| } |
| |
| HValue* arguments() { return OperandAt(0); } |
| HValue* length() { return OperandAt(1); } |
| HValue* index() { return OperandAt(2); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt) |
| |
| private: |
| HAccessArgumentsAt(HValue* arguments, HValue* length, HValue* index) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetOperandAt(0, arguments); |
| SetOperandAt(1, length); |
| SetOperandAt(2, index); |
| } |
| |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HBoundsCheckBaseIndexInformation; |
| |
| |
| class HBoundsCheck V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HBoundsCheck, HValue*, HValue*); |
| |
| bool skip_check() const { return skip_check_; } |
| void set_skip_check() { skip_check_ = true; } |
| |
| HValue* base() { return base_; } |
| int offset() { return offset_; } |
| int scale() { return scale_; } |
| |
| void ApplyIndexChange(); |
| bool DetectCompoundIndex() { |
| ASSERT(base() == NULL); |
| |
| DecompositionResult decomposition; |
| if (index()->TryDecompose(&decomposition)) { |
| base_ = decomposition.base(); |
| offset_ = decomposition.offset(); |
| scale_ = decomposition.scale(); |
| return true; |
| } else { |
| base_ = index(); |
| offset_ = 0; |
| scale_ = 0; |
| return false; |
| } |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| |
| HValue* index() { return OperandAt(0); } |
| HValue* length() { return OperandAt(1); } |
| bool allow_equality() { return allow_equality_; } |
| void set_allow_equality(bool v) { allow_equality_ = v; } |
| |
| virtual int RedefinedOperandIndex() V8_OVERRIDE { return 0; } |
| virtual bool IsPurelyInformativeDefinition() V8_OVERRIDE { |
| return skip_check(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(BoundsCheck) |
| |
| protected: |
| friend class HBoundsCheckBaseIndexInformation; |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| bool skip_check_; |
| HValue* base_; |
| int offset_; |
| int scale_; |
| bool allow_equality_; |
| |
| private: |
| // Normally HBoundsCheck should be created using the |
| // HGraphBuilder::AddBoundsCheck() helper. |
| // However when building stubs, where we know that the arguments are Int32, |
| // it makes sense to invoke this constructor directly. |
| HBoundsCheck(HValue* index, HValue* length) |
| : skip_check_(false), |
| base_(NULL), offset_(0), scale_(0), |
| allow_equality_(false) { |
| SetOperandAt(0, index); |
| SetOperandAt(1, length); |
| SetFlag(kFlexibleRepresentation); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return skip_check() && !FLAG_debug_code; |
| } |
| }; |
| |
| |
| class HBoundsCheckBaseIndexInformation V8_FINAL |
| : public HTemplateInstruction<2> { |
| public: |
| explicit HBoundsCheckBaseIndexInformation(HBoundsCheck* check) { |
| DecompositionResult decomposition; |
| if (check->index()->TryDecompose(&decomposition)) { |
| SetOperandAt(0, decomposition.base()); |
| SetOperandAt(1, check); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| HValue* base_index() { return OperandAt(0); } |
| HBoundsCheck* bounds_check() { return HBoundsCheck::cast(OperandAt(1)); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(BoundsCheckBaseIndexInformation) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual int RedefinedOperandIndex() V8_OVERRIDE { return 0; } |
| virtual bool IsPurelyInformativeDefinition() V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HBitwiseBinaryOperation : public HBinaryOperation { |
| public: |
| HBitwiseBinaryOperation(HValue* context, HValue* left, HValue* right, |
| HType type = HType::Tagged()) |
| : HBinaryOperation(context, left, right, type) { |
| SetFlag(kFlexibleRepresentation); |
| SetFlag(kTruncatingToInt32); |
| SetFlag(kAllowUndefinedAsNaN); |
| SetAllSideEffects(); |
| } |
| |
| virtual void RepresentationChanged(Representation to) V8_OVERRIDE { |
| if (to.IsTagged()) SetGVNFlag(kChangesNewSpacePromotion); |
| if (to.IsTagged() && |
| (left()->ToNumberCanBeObserved() || right()->ToNumberCanBeObserved())) { |
| SetAllSideEffects(); |
| ClearFlag(kUseGVN); |
| } else { |
| ClearAllSideEffects(); |
| SetFlag(kUseGVN); |
| } |
| } |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| // We only generate either int32 or generic tagged bitwise operations. |
| if (new_rep.IsDouble()) new_rep = Representation::Integer32(); |
| HBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| Representation r = HBinaryOperation::observed_input_representation(index); |
| if (r.IsDouble()) return Representation::Integer32(); |
| return r; |
| } |
| |
| virtual void initialize_output_representation(Representation observed) { |
| if (observed.IsDouble()) observed = Representation::Integer32(); |
| HBinaryOperation::initialize_output_representation(observed); |
| } |
| |
| DECLARE_ABSTRACT_INSTRUCTION(BitwiseBinaryOperation) |
| |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HMathFloorOfDiv V8_FINAL : public HBinaryOperation { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HMathFloorOfDiv, |
| HValue*, |
| HValue*); |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HMathFloorOfDiv(HValue* context, HValue* left, HValue* right) |
| : HBinaryOperation(context, left, right) { |
| set_representation(Representation::Integer32()); |
| SetFlag(kUseGVN); |
| SetFlag(kCanOverflow); |
| if (!right->IsConstant()) { |
| SetFlag(kCanBeDivByZero); |
| } |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HArithmeticBinaryOperation : public HBinaryOperation { |
| public: |
| HArithmeticBinaryOperation(HValue* context, HValue* left, HValue* right) |
| : HBinaryOperation(context, left, right, HType::TaggedNumber()) { |
| SetAllSideEffects(); |
| SetFlag(kFlexibleRepresentation); |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| |
| virtual void RepresentationChanged(Representation to) V8_OVERRIDE { |
| if (to.IsTagged()) SetGVNFlag(kChangesNewSpacePromotion); |
| if (to.IsTagged() && |
| (left()->ToNumberCanBeObserved() || right()->ToNumberCanBeObserved())) { |
| SetAllSideEffects(); |
| ClearFlag(kUseGVN); |
| } else { |
| ClearAllSideEffects(); |
| SetFlag(kUseGVN); |
| } |
| } |
| |
| DECLARE_ABSTRACT_INSTRUCTION(ArithmeticBinaryOperation) |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HCompareGeneric V8_FINAL : public HBinaryOperation { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HCompareGeneric, HValue*, |
| HValue*, Token::Value); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return index == 0 |
| ? Representation::Tagged() |
| : representation(); |
| } |
| |
| Token::Value token() const { return token_; } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareGeneric) |
| |
| private: |
| HCompareGeneric(HValue* context, |
| HValue* left, |
| HValue* right, |
| Token::Value token) |
| : HBinaryOperation(context, left, right, HType::Boolean()), |
| token_(token) { |
| ASSERT(Token::IsCompareOp(token)); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Token::Value token_; |
| }; |
| |
| |
| class HCompareNumericAndBranch : public HTemplateControlInstruction<2, 2> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P3(HCompareNumericAndBranch, |
| HValue*, HValue*, Token::Value); |
| DECLARE_INSTRUCTION_FACTORY_P5(HCompareNumericAndBranch, |
| HValue*, HValue*, Token::Value, |
| HBasicBlock*, HBasicBlock*); |
| |
| HValue* left() { return OperandAt(0); } |
| HValue* right() { return OperandAt(1); } |
| Token::Value token() const { return token_; } |
| |
| void set_observed_input_representation(Representation left, |
| Representation right) { |
| observed_input_representation_[0] = left; |
| observed_input_representation_[1] = right; |
| } |
| |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| return observed_input_representation_[index]; |
| } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| void SetOperandPositions(Zone* zone, int left_pos, int right_pos) { |
| set_operand_position(zone, 0, left_pos); |
| set_operand_position(zone, 1, right_pos); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareNumericAndBranch) |
| |
| private: |
| HCompareNumericAndBranch(HValue* left, |
| HValue* right, |
| Token::Value token, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : token_(token) { |
| SetFlag(kFlexibleRepresentation); |
| ASSERT(Token::IsCompareOp(token)); |
| SetOperandAt(0, left); |
| SetOperandAt(1, right); |
| SetSuccessorAt(0, true_target); |
| SetSuccessorAt(1, false_target); |
| } |
| |
| Representation observed_input_representation_[2]; |
| Token::Value token_; |
| }; |
| |
| |
| class HCompareHoleAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HCompareHoleAndBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P3(HCompareHoleAndBranch, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareHoleAndBranch) |
| |
| private: |
| HCompareHoleAndBranch(HValue* value, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target) { |
| SetFlag(kFlexibleRepresentation); |
| SetFlag(kAllowUndefinedAsNaN); |
| } |
| }; |
| |
| |
| class HCompareMinusZeroAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HCompareMinusZeroAndBranch, HValue*); |
| |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return representation(); |
| } |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareMinusZeroAndBranch) |
| |
| private: |
| explicit HCompareMinusZeroAndBranch(HValue* value) |
| : HUnaryControlInstruction(value, NULL, NULL) { |
| } |
| }; |
| |
| |
| class HCompareObjectEqAndBranch : public HTemplateControlInstruction<2, 2> { |
| public: |
| HCompareObjectEqAndBranch(HValue* left, |
| HValue* right, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) { |
| // TODO(danno): make this private when the IfBuilder properly constructs |
| // control flow instructions. |
| ASSERT(!left->IsConstant() || |
| (!HConstant::cast(left)->HasInteger32Value() || |
| HConstant::cast(left)->HasSmiValue())); |
| ASSERT(!right->IsConstant() || |
| (!HConstant::cast(right)->HasInteger32Value() || |
| HConstant::cast(right)->HasSmiValue())); |
| SetOperandAt(0, left); |
| SetOperandAt(1, right); |
| SetSuccessorAt(0, true_target); |
| SetSuccessorAt(1, false_target); |
| } |
| |
| DECLARE_INSTRUCTION_FACTORY_P2(HCompareObjectEqAndBranch, HValue*, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P4(HCompareObjectEqAndBranch, HValue*, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE; |
| |
| HValue* left() { return OperandAt(0); } |
| HValue* right() { return OperandAt(1); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CompareObjectEqAndBranch) |
| }; |
| |
| |
| class HIsObjectAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HIsObjectAndBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P3(HIsObjectAndBranch, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch) |
| |
| private: |
| HIsObjectAndBranch(HValue* value, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target) {} |
| }; |
| |
| |
| class HIsStringAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HIsStringAndBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P3(HIsStringAndBranch, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch) |
| |
| private: |
| HIsStringAndBranch(HValue* value, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target) {} |
| }; |
| |
| |
| class HIsSmiAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HIsSmiAndBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P3(HIsSmiAndBranch, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HIsSmiAndBranch(HValue* value, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target) {} |
| }; |
| |
| |
| class HIsUndetectableAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HIsUndetectableAndBranch, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P3(HIsUndetectableAndBranch, HValue*, |
| HBasicBlock*, HBasicBlock*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(IsUndetectableAndBranch) |
| |
| private: |
| HIsUndetectableAndBranch(HValue* value, |
| HBasicBlock* true_target = NULL, |
| HBasicBlock* false_target = NULL) |
| : HUnaryControlInstruction(value, true_target, false_target) {} |
| }; |
| |
| |
| class HStringCompareAndBranch : public HTemplateControlInstruction<2, 3> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HStringCompareAndBranch, |
| HValue*, |
| HValue*, |
| Token::Value); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* left() { return OperandAt(1); } |
| HValue* right() { return OperandAt(2); } |
| Token::Value token() const { return token_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| Representation GetInputRepresentation() const { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch) |
| |
| private: |
| HStringCompareAndBranch(HValue* context, |
| HValue* left, |
| HValue* right, |
| Token::Value token) |
| : token_(token) { |
| ASSERT(Token::IsCompareOp(token)); |
| SetOperandAt(0, context); |
| SetOperandAt(1, left); |
| SetOperandAt(2, right); |
| set_representation(Representation::Tagged()); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| Token::Value token_; |
| }; |
| |
| |
| class HIsConstructCallAndBranch : public HTemplateControlInstruction<2, 0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P0(HIsConstructCallAndBranch); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(IsConstructCallAndBranch) |
| private: |
| HIsConstructCallAndBranch() {} |
| }; |
| |
| |
| class HHasInstanceTypeAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2( |
| HHasInstanceTypeAndBranch, HValue*, InstanceType); |
| DECLARE_INSTRUCTION_FACTORY_P3( |
| HHasInstanceTypeAndBranch, HValue*, InstanceType, InstanceType); |
| |
| InstanceType from() { return from_; } |
| InstanceType to() { return to_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch) |
| |
| private: |
| HHasInstanceTypeAndBranch(HValue* value, InstanceType type) |
| : HUnaryControlInstruction(value, NULL, NULL), from_(type), to_(type) { } |
| HHasInstanceTypeAndBranch(HValue* value, InstanceType from, InstanceType to) |
| : HUnaryControlInstruction(value, NULL, NULL), from_(from), to_(to) { |
| ASSERT(to == LAST_TYPE); // Others not implemented yet in backend. |
| } |
| |
| InstanceType from_; |
| InstanceType to_; // Inclusive range, not all combinations work. |
| }; |
| |
| |
| class HHasCachedArrayIndexAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HHasCachedArrayIndexAndBranch, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch) |
| private: |
| explicit HHasCachedArrayIndexAndBranch(HValue* value) |
| : HUnaryControlInstruction(value, NULL, NULL) { } |
| }; |
| |
| |
| class HGetCachedArrayIndex V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HGetCachedArrayIndex, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HGetCachedArrayIndex(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HClassOfTestAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HClassOfTestAndBranch, HValue*, |
| Handle<String>); |
| |
| DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| Handle<String> class_name() const { return class_name_; } |
| |
| private: |
| HClassOfTestAndBranch(HValue* value, Handle<String> class_name) |
| : HUnaryControlInstruction(value, NULL, NULL), |
| class_name_(class_name) { } |
| |
| Handle<String> class_name_; |
| }; |
| |
| |
| class HTypeofIsAndBranch V8_FINAL : public HUnaryControlInstruction { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HTypeofIsAndBranch, HValue*, Handle<String>); |
| |
| Handle<String> type_literal() { return type_literal_; } |
| bool compares_number_type() { return compares_number_type_; } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch) |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| virtual bool KnownSuccessorBlock(HBasicBlock** block) V8_OVERRIDE; |
| |
| private: |
| HTypeofIsAndBranch(HValue* value, Handle<String> type_literal) |
| : HUnaryControlInstruction(value, NULL, NULL), |
| type_literal_(type_literal) { |
| Heap* heap = type_literal->GetHeap(); |
| compares_number_type_ = type_literal->Equals(heap->number_string()); |
| } |
| |
| Handle<String> type_literal_; |
| bool compares_number_type_ : 1; |
| }; |
| |
| |
| class HInstanceOf V8_FINAL : public HBinaryOperation { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HInstanceOf, HValue*, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(InstanceOf) |
| |
| private: |
| HInstanceOf(HValue* context, HValue* left, HValue* right) |
| : HBinaryOperation(context, left, right, HType::Boolean()) { |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| }; |
| |
| |
| class HInstanceOfKnownGlobal V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HInstanceOfKnownGlobal, |
| HValue*, |
| Handle<JSFunction>); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* left() { return OperandAt(1); } |
| Handle<JSFunction> function() { return function_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal) |
| |
| private: |
| HInstanceOfKnownGlobal(HValue* context, |
| HValue* left, |
| Handle<JSFunction> right) |
| : HTemplateInstruction<2>(HType::Boolean()), function_(right) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, left); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Handle<JSFunction> function_; |
| }; |
| |
| |
| class HPower V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| HValue* left() { return OperandAt(0); } |
| HValue* right() const { return OperandAt(1); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return index == 0 |
| ? Representation::Double() |
| : Representation::None(); |
| } |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| return RequiredInputRepresentation(index); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Power) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HPower(HValue* left, HValue* right) { |
| SetOperandAt(0, left); |
| SetOperandAt(1, right); |
| set_representation(Representation::Double()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return !right()->representation().IsTagged(); |
| } |
| }; |
| |
| |
| class HAdd V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| // Add is only commutative if two integer values are added and not if two |
| // tagged values are added (because it might be a String concatenation). |
| // We also do not commute (pointer + offset). |
| virtual bool IsCommutative() const V8_OVERRIDE { |
| return !representation().IsTagged() && !representation().IsExternal(); |
| } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { |
| if (left()->IsInteger32Constant()) { |
| decomposition->Apply(right(), left()->GetInteger32Constant()); |
| return true; |
| } else if (right()->IsInteger32Constant()) { |
| decomposition->Apply(left(), right()->GetInteger32Constant()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| virtual void RepresentationChanged(Representation to) V8_OVERRIDE { |
| if (to.IsTagged()) { |
| SetGVNFlag(kChangesNewSpacePromotion); |
| ClearFlag(kAllowUndefinedAsNaN); |
| } |
| if (to.IsTagged() && |
| (left()->ToNumberCanBeObserved() || right()->ToNumberCanBeObserved() || |
| left()->ToStringCanBeObserved() || right()->ToStringCanBeObserved())) { |
| SetAllSideEffects(); |
| ClearFlag(kUseGVN); |
| } else { |
| ClearAllSideEffects(); |
| SetFlag(kUseGVN); |
| } |
| } |
| |
| virtual Representation RepresentationFromInputs() V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(Add) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HAdd(HValue* context, HValue* left, HValue* right) |
| : HArithmeticBinaryOperation(context, left, right) { |
| SetFlag(kCanOverflow); |
| } |
| }; |
| |
| |
| class HSub V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { |
| if (right()->IsInteger32Constant()) { |
| decomposition->Apply(left(), -right()->GetInteger32Constant()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Sub) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HSub(HValue* context, HValue* left, HValue* right) |
| : HArithmeticBinaryOperation(context, left, right) { |
| SetFlag(kCanOverflow); |
| } |
| }; |
| |
| |
| class HMul V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| static HInstruction* NewImul(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right) { |
| HInstruction* instr = HMul::New(zone, context, left, right); |
| if (!instr->IsMul()) return instr; |
| HMul* mul = HMul::cast(instr); |
| // TODO(mstarzinger): Prevent bailout on minus zero for imul. |
| mul->AssumeRepresentation(Representation::Integer32()); |
| mul->ClearFlag(HValue::kCanOverflow); |
| return mul; |
| } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| // Only commutative if it is certain that not two objects are multiplicated. |
| virtual bool IsCommutative() const V8_OVERRIDE { |
| return !representation().IsTagged(); |
| } |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| HArithmeticBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| bool MulMinusOne(); |
| |
| DECLARE_CONCRETE_INSTRUCTION(Mul) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HMul(HValue* context, HValue* left, HValue* right) |
| : HArithmeticBinaryOperation(context, left, right) { |
| SetFlag(kCanOverflow); |
| } |
| }; |
| |
| |
| class HMod V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| bool HasPowerOf2Divisor() { |
| if (right()->IsConstant() && |
| HConstant::cast(right())->HasInteger32Value()) { |
| int32_t value = HConstant::cast(right())->Integer32Value(); |
| return value != 0 && (IsPowerOf2(value) || IsPowerOf2(-value)); |
| } |
| |
| return false; |
| } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi()) new_rep = Representation::Integer32(); |
| HArithmeticBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Mod) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HMod(HValue* context, |
| HValue* left, |
| HValue* right) : HArithmeticBinaryOperation(context, left, right) { |
| SetFlag(kCanBeDivByZero); |
| SetFlag(kCanOverflow); |
| } |
| }; |
| |
| |
| class HDiv V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| bool HasPowerOf2Divisor() { |
| if (right()->IsInteger32Constant()) { |
| int32_t value = right()->GetInteger32Constant(); |
| return value != 0 && (IsPowerOf2(value) || IsPowerOf2(-value)); |
| } |
| |
| return false; |
| } |
| |
| virtual HValue* EnsureAndPropagateNotMinusZero( |
| BitVector* visited) V8_OVERRIDE; |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi()) new_rep = Representation::Integer32(); |
| HArithmeticBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Div) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HDiv(HValue* context, HValue* left, HValue* right) |
| : HArithmeticBinaryOperation(context, left, right) { |
| SetFlag(kCanBeDivByZero); |
| SetFlag(kCanOverflow); |
| } |
| }; |
| |
| |
| class HMathMinMax V8_FINAL : public HArithmeticBinaryOperation { |
| public: |
| enum Operation { kMathMin, kMathMax }; |
| |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right, |
| Operation op); |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| return RequiredInputRepresentation(index); |
| } |
| |
| virtual void InferRepresentation( |
| HInferRepresentationPhase* h_infer) V8_OVERRIDE; |
| |
| virtual Representation RepresentationFromInputs() V8_OVERRIDE { |
| Representation left_rep = left()->representation(); |
| Representation right_rep = right()->representation(); |
| Representation result = Representation::Smi(); |
| result = result.generalize(left_rep); |
| result = result.generalize(right_rep); |
| if (result.IsTagged()) return Representation::Double(); |
| return result; |
| } |
| |
| virtual bool IsCommutative() const V8_OVERRIDE { return true; } |
| |
| Operation operation() { return operation_; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(MathMinMax) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return other->IsMathMinMax() && |
| HMathMinMax::cast(other)->operation_ == operation_; |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HMathMinMax(HValue* context, HValue* left, HValue* right, Operation op) |
| : HArithmeticBinaryOperation(context, left, right), |
| operation_(op) { } |
| |
| Operation operation_; |
| }; |
| |
| |
| class HBitwise V8_FINAL : public HBitwiseBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| Token::Value op, |
| HValue* left, |
| HValue* right); |
| |
| Token::Value op() const { return op_; } |
| |
| virtual bool IsCommutative() const V8_OVERRIDE { return true; } |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(Bitwise) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return op() == HBitwise::cast(other)->op(); |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| private: |
| HBitwise(HValue* context, |
| Token::Value op, |
| HValue* left, |
| HValue* right) |
| : HBitwiseBinaryOperation(context, left, right, HType::TaggedNumber()), |
| op_(op) { |
| ASSERT(op == Token::BIT_AND || op == Token::BIT_OR || op == Token::BIT_XOR); |
| // BIT_AND with a smi-range positive value will always unset the |
| // entire sign-extension of the smi-sign. |
| if (op == Token::BIT_AND && |
| ((left->IsConstant() && |
| left->representation().IsSmi() && |
| HConstant::cast(left)->Integer32Value() >= 0) || |
| (right->IsConstant() && |
| right->representation().IsSmi() && |
| HConstant::cast(right)->Integer32Value() >= 0))) { |
| SetFlag(kTruncatingToSmi); |
| SetFlag(kTruncatingToInt32); |
| // BIT_OR with a smi-range negative value will always set the entire |
| // sign-extension of the smi-sign. |
| } else if (op == Token::BIT_OR && |
| ((left->IsConstant() && |
| left->representation().IsSmi() && |
| HConstant::cast(left)->Integer32Value() < 0) || |
| (right->IsConstant() && |
| right->representation().IsSmi() && |
| HConstant::cast(right)->Integer32Value() < 0))) { |
| SetFlag(kTruncatingToSmi); |
| SetFlag(kTruncatingToInt32); |
| } |
| } |
| |
| Token::Value op_; |
| }; |
| |
| |
| class HShl V8_FINAL : public HBitwiseBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi() && |
| !(right()->IsInteger32Constant() && |
| right()->GetInteger32Constant() >= 0)) { |
| new_rep = Representation::Integer32(); |
| } |
| HBitwiseBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Shl) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HShl(HValue* context, HValue* left, HValue* right) |
| : HBitwiseBinaryOperation(context, left, right) { } |
| }; |
| |
| |
| class HShr V8_FINAL : public HBitwiseBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { |
| if (right()->IsInteger32Constant()) { |
| if (decomposition->Apply(left(), 0, right()->GetInteger32Constant())) { |
| // This is intended to look for HAdd and HSub, to handle compounds |
| // like ((base + offset) >> scale) with one single decomposition. |
| left()->TryDecompose(decomposition); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi()) new_rep = Representation::Integer32(); |
| HBitwiseBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Shr) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HShr(HValue* context, HValue* left, HValue* right) |
| : HBitwiseBinaryOperation(context, left, right) { } |
| }; |
| |
| |
| class HSar V8_FINAL : public HBitwiseBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right); |
| |
| virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { |
| if (right()->IsInteger32Constant()) { |
| if (decomposition->Apply(left(), 0, right()->GetInteger32Constant())) { |
| // This is intended to look for HAdd and HSub, to handle compounds |
| // like ((base + offset) >> scale) with one single decomposition. |
| left()->TryDecompose(decomposition); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi()) new_rep = Representation::Integer32(); |
| HBitwiseBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Sar) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HSar(HValue* context, HValue* left, HValue* right) |
| : HBitwiseBinaryOperation(context, left, right) { } |
| }; |
| |
| |
| class HRor V8_FINAL : public HBitwiseBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right) { |
| return new(zone) HRor(context, left, right); |
| } |
| |
| virtual void UpdateRepresentation(Representation new_rep, |
| HInferRepresentationPhase* h_infer, |
| const char* reason) V8_OVERRIDE { |
| if (new_rep.IsSmi()) new_rep = Representation::Integer32(); |
| HBitwiseBinaryOperation::UpdateRepresentation(new_rep, h_infer, reason); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Ror) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HRor(HValue* context, HValue* left, HValue* right) |
| : HBitwiseBinaryOperation(context, left, right) { |
| ChangeRepresentation(Representation::Integer32()); |
| } |
| }; |
| |
| |
| class HOsrEntry V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HOsrEntry, BailoutId); |
| |
| BailoutId ast_id() const { return ast_id_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(OsrEntry) |
| |
| private: |
| explicit HOsrEntry(BailoutId ast_id) : ast_id_(ast_id) { |
| SetGVNFlag(kChangesOsrEntries); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| BailoutId ast_id_; |
| }; |
| |
| |
| class HParameter V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| enum ParameterKind { |
| STACK_PARAMETER, |
| REGISTER_PARAMETER |
| }; |
| |
| DECLARE_INSTRUCTION_FACTORY_P1(HParameter, unsigned); |
| DECLARE_INSTRUCTION_FACTORY_P2(HParameter, unsigned, ParameterKind); |
| DECLARE_INSTRUCTION_FACTORY_P3(HParameter, unsigned, ParameterKind, |
| Representation); |
| |
| unsigned index() const { return index_; } |
| ParameterKind kind() const { return kind_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Parameter) |
| |
| private: |
| explicit HParameter(unsigned index, |
| ParameterKind kind = STACK_PARAMETER) |
| : index_(index), |
| kind_(kind) { |
| set_representation(Representation::Tagged()); |
| } |
| |
| explicit HParameter(unsigned index, |
| ParameterKind kind, |
| Representation r) |
| : index_(index), |
| kind_(kind) { |
| set_representation(r); |
| } |
| |
| unsigned index_; |
| ParameterKind kind_; |
| }; |
| |
| |
| class HCallStub V8_FINAL : public HUnaryCall { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HCallStub, CodeStub::Major, int); |
| CodeStub::Major major_key() { return major_key_; } |
| |
| HValue* context() { return value(); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(CallStub) |
| |
| private: |
| HCallStub(HValue* context, CodeStub::Major major_key, int argument_count) |
| : HUnaryCall(context, argument_count), |
| major_key_(major_key) { |
| } |
| |
| CodeStub::Major major_key_; |
| }; |
| |
| |
| class HUnknownOSRValue V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HUnknownOSRValue, HEnvironment*, int); |
| |
| virtual void PrintDataTo(StringStream* stream); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| void set_incoming_value(HPhi* value) { incoming_value_ = value; } |
| HPhi* incoming_value() { return incoming_value_; } |
| HEnvironment *environment() { return environment_; } |
| int index() { return index_; } |
| |
| virtual Representation KnownOptimalRepresentation() V8_OVERRIDE { |
| if (incoming_value_ == NULL) return Representation::None(); |
| return incoming_value_->KnownOptimalRepresentation(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(UnknownOSRValue) |
| |
| private: |
| HUnknownOSRValue(HEnvironment* environment, int index) |
| : environment_(environment), |
| index_(index), |
| incoming_value_(NULL) { |
| set_representation(Representation::Tagged()); |
| } |
| |
| HEnvironment* environment_; |
| int index_; |
| HPhi* incoming_value_; |
| }; |
| |
| |
| class HLoadGlobalCell V8_FINAL : public HTemplateInstruction<0> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HLoadGlobalCell, Handle<Cell>, |
| PropertyDetails); |
| |
| Unique<Cell> cell() const { return cell_; } |
| bool RequiresHoleCheck() const; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual intptr_t Hashcode() V8_OVERRIDE { |
| return cell_.Hashcode(); |
| } |
| |
| virtual void FinalizeUniqueness() V8_OVERRIDE { |
| cell_ = Unique<Cell>(cell_.handle()); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::None(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadGlobalCell) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return cell_ == HLoadGlobalCell::cast(other)->cell_; |
| } |
| |
| private: |
| HLoadGlobalCell(Handle<Cell> cell, PropertyDetails details) |
| : cell_(Unique<Cell>::CreateUninitialized(cell)), details_(details) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnGlobalVars); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return !RequiresHoleCheck(); } |
| |
| Unique<Cell> cell_; |
| PropertyDetails details_; |
| }; |
| |
| |
| class HLoadGlobalGeneric V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P3(HLoadGlobalGeneric, HValue*, |
| Handle<Object>, bool); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* global_object() { return OperandAt(1); } |
| Handle<Object> name() const { return name_; } |
| bool for_typeof() const { return for_typeof_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric) |
| |
| private: |
| HLoadGlobalGeneric(HValue* context, |
| HValue* global_object, |
| Handle<Object> name, |
| bool for_typeof) |
| : name_(name), |
| for_typeof_(for_typeof) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, global_object); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Handle<Object> name_; |
| bool for_typeof_; |
| }; |
| |
| |
| class HAllocate V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HAllocate* New(Zone* zone, |
| HValue* context, |
| HValue* size, |
| HType type, |
| PretenureFlag pretenure_flag, |
| InstanceType instance_type, |
| Handle<AllocationSite> allocation_site = |
| Handle<AllocationSite>::null()) { |
| return new(zone) HAllocate(context, size, type, pretenure_flag, |
| instance_type, allocation_site); |
| } |
| |
| // Maximum instance size for which allocations will be inlined. |
| static const int kMaxInlineSize = 64 * kPointerSize; |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* size() { return OperandAt(1); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| if (index == 0) { |
| return Representation::Tagged(); |
| } else { |
| return Representation::Integer32(); |
| } |
| } |
| |
| virtual Handle<Map> GetMonomorphicJSObjectMap() { |
| return known_initial_map_; |
| } |
| |
| void set_known_initial_map(Handle<Map> known_initial_map) { |
| known_initial_map_ = known_initial_map; |
| } |
| |
| bool IsNewSpaceAllocation() const { |
| return (flags_ & ALLOCATE_IN_NEW_SPACE) != 0; |
| } |
| |
| bool IsOldDataSpaceAllocation() const { |
| return (flags_ & ALLOCATE_IN_OLD_DATA_SPACE) != 0; |
| } |
| |
| bool IsOldPointerSpaceAllocation() const { |
| return (flags_ & ALLOCATE_IN_OLD_POINTER_SPACE) != 0; |
| } |
| |
| bool MustAllocateDoubleAligned() const { |
| return (flags_ & ALLOCATE_DOUBLE_ALIGNED) != 0; |
| } |
| |
| bool MustPrefillWithFiller() const { |
| return (flags_ & PREFILL_WITH_FILLER) != 0; |
| } |
| |
| void MakePrefillWithFiller() { |
| flags_ = static_cast<HAllocate::Flags>(flags_ | PREFILL_WITH_FILLER); |
| } |
| |
| void MakeDoubleAligned() { |
| flags_ = static_cast<HAllocate::Flags>(flags_ | ALLOCATE_DOUBLE_ALIGNED); |
| } |
| |
| virtual void HandleSideEffectDominator(GVNFlag side_effect, |
| HValue* dominator) V8_OVERRIDE; |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(Allocate) |
| |
| private: |
| enum Flags { |
| ALLOCATE_IN_NEW_SPACE = 1 << 0, |
| ALLOCATE_IN_OLD_DATA_SPACE = 1 << 1, |
| ALLOCATE_IN_OLD_POINTER_SPACE = 1 << 2, |
| ALLOCATE_DOUBLE_ALIGNED = 1 << 3, |
| PREFILL_WITH_FILLER = 1 << 4 |
| }; |
| |
| HAllocate(HValue* context, |
| HValue* size, |
| HType type, |
| PretenureFlag pretenure_flag, |
| InstanceType instance_type, |
| Handle<AllocationSite> allocation_site = |
| Handle<AllocationSite>::null()) |
| : HTemplateInstruction<2>(type), |
| dominating_allocate_(NULL), |
| filler_free_space_size_(NULL), |
| clear_next_map_word_(false) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, size); |
| set_representation(Representation::Tagged()); |
| SetFlag(kTrackSideEffectDominators); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| SetGVNFlag(kDependsOnNewSpacePromotion); |
| flags_ = pretenure_flag == TENURED |
| ? (Heap::TargetSpaceId(instance_type) == OLD_POINTER_SPACE |
| ? ALLOCATE_IN_OLD_POINTER_SPACE : ALLOCATE_IN_OLD_DATA_SPACE) |
| : ALLOCATE_IN_NEW_SPACE; |
| if (instance_type == FIXED_DOUBLE_ARRAY_TYPE) { |
| flags_ = static_cast<HAllocate::Flags>(flags_ | ALLOCATE_DOUBLE_ALIGNED); |
| } |
| // We have to fill the allocated object with one word fillers if we do |
| // not use allocation folding since some allocations may depend on each |
| // other, i.e., have a pointer to each other. A GC in between these |
| // allocations may leave such objects behind in a not completely initialized |
| // state. |
| if (!FLAG_use_gvn || !FLAG_use_allocation_folding) { |
| flags_ = static_cast<HAllocate::Flags>(flags_ | PREFILL_WITH_FILLER); |
| } |
| clear_next_map_word_ = pretenure_flag == NOT_TENURED && |
| AllocationSite::CanTrack(instance_type); |
| |
| if (FLAG_trace_pretenuring) { |
| PrintF("HAllocate with AllocationSite %p %s\n", |
| allocation_site.is_null() |
| ? static_cast<void*>(NULL) |
| : static_cast<void*>(*allocation_site), |
| pretenure_flag == TENURED ? "tenured" : "not tenured"); |
| } |
| } |
| |
| void UpdateSize(HValue* size) { |
| SetOperandAt(1, size); |
| } |
| |
| HAllocate* GetFoldableDominator(HAllocate* dominator); |
| |
| void UpdateFreeSpaceFiller(int32_t filler_size); |
| |
| void CreateFreeSpaceFiller(int32_t filler_size); |
| |
| bool IsFoldable(HAllocate* allocate) { |
| return (IsNewSpaceAllocation() && allocate->IsNewSpaceAllocation()) || |
| (IsOldDataSpaceAllocation() && allocate->IsOldDataSpaceAllocation()) || |
| (IsOldPointerSpaceAllocation() && |
| allocate->IsOldPointerSpaceAllocation()); |
| } |
| |
| void ClearNextMapWord(int offset); |
| |
| Flags flags_; |
| Handle<Map> known_initial_map_; |
| HAllocate* dominating_allocate_; |
| HStoreNamedField* filler_free_space_size_; |
| bool clear_next_map_word_; |
| }; |
| |
| |
| class HStoreCodeEntry V8_FINAL: public HTemplateInstruction<2> { |
| public: |
| static HStoreCodeEntry* New(Zone* zone, |
| HValue* context, |
| HValue* function, |
| HValue* code) { |
| return new(zone) HStoreCodeEntry(function, code); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) { |
| return Representation::Tagged(); |
| } |
| |
| HValue* function() { return OperandAt(0); } |
| HValue* code_object() { return OperandAt(1); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreCodeEntry) |
| |
| private: |
| HStoreCodeEntry(HValue* function, HValue* code) { |
| SetOperandAt(0, function); |
| SetOperandAt(1, code); |
| } |
| }; |
| |
| |
| class HInnerAllocatedObject V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HInnerAllocatedObject* New(Zone* zone, |
| HValue* context, |
| HValue* value, |
| HValue* offset, |
| HType type = HType::Tagged()) { |
| return new(zone) HInnerAllocatedObject(value, offset, type); |
| } |
| |
| HValue* base_object() { return OperandAt(0); } |
| HValue* offset() { return OperandAt(1); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return index == 0 ? Representation::Tagged() : Representation::Integer32(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(InnerAllocatedObject) |
| |
| private: |
| HInnerAllocatedObject(HValue* value, |
| HValue* offset, |
| HType type = HType::Tagged()) |
| : HTemplateInstruction<2>(type) { |
| ASSERT(value->IsAllocate()); |
| SetOperandAt(0, value); |
| SetOperandAt(1, offset); |
| set_type(type); |
| set_representation(Representation::Tagged()); |
| } |
| }; |
| |
| |
| inline bool StoringValueNeedsWriteBarrier(HValue* value) { |
| return !value->type().IsBoolean() |
| && !value->type().IsSmi() |
| && !(value->IsConstant() && HConstant::cast(value)->ImmortalImmovable()); |
| } |
| |
| |
| inline bool ReceiverObjectNeedsWriteBarrier(HValue* object, |
| HValue* value, |
| HValue* new_space_dominator) { |
| while (object->IsInnerAllocatedObject()) { |
| object = HInnerAllocatedObject::cast(object)->base_object(); |
| } |
| if (object->IsConstant() && HConstant::cast(object)->IsCell()) { |
| return false; |
| } |
| if (object->IsConstant() && |
| HConstant::cast(object)->HasExternalReferenceValue()) { |
| // Stores to external references require no write barriers |
| return false; |
| } |
| if (object != new_space_dominator) return true; |
| if (object->IsAllocate()) { |
| // Stores to new space allocations require no write barriers if the object |
| // is the new space dominator. |
| if (HAllocate::cast(object)->IsNewSpaceAllocation()) { |
| return false; |
| } |
| // Likewise we don't need a write barrier if we store a value that |
| // originates from the same allocation (via allocation folding). |
| while (value->IsInnerAllocatedObject()) { |
| value = HInnerAllocatedObject::cast(value)->base_object(); |
| } |
| return object != value; |
| } |
| return true; |
| } |
| |
| |
| class HStoreGlobalCell V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P3(HStoreGlobalCell, HValue*, |
| Handle<PropertyCell>, PropertyDetails); |
| |
| Unique<PropertyCell> cell() const { return cell_; } |
| bool RequiresHoleCheck() { |
| return !details_.IsDontDelete() || details_.IsReadOnly(); |
| } |
| bool NeedsWriteBarrier() { |
| return StoringValueNeedsWriteBarrier(value()); |
| } |
| |
| virtual void FinalizeUniqueness() V8_OVERRIDE { |
| cell_ = Unique<PropertyCell>(cell_.handle()); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell) |
| |
| private: |
| HStoreGlobalCell(HValue* value, |
| Handle<PropertyCell> cell, |
| PropertyDetails details) |
| : HUnaryOperation(value), |
| cell_(Unique<PropertyCell>::CreateUninitialized(cell)), |
| details_(details) { |
| SetGVNFlag(kChangesGlobalVars); |
| } |
| |
| Unique<PropertyCell> cell_; |
| PropertyDetails details_; |
| }; |
| |
| |
| class HStoreGlobalGeneric : public HTemplateInstruction<3> { |
| public: |
| inline static HStoreGlobalGeneric* New(Zone* zone, |
| HValue* context, |
| HValue* global_object, |
| Handle<Object> name, |
| HValue* value, |
| StrictModeFlag strict_mode_flag) { |
| return new(zone) HStoreGlobalGeneric(context, global_object, |
| name, value, strict_mode_flag); |
| } |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* global_object() { return OperandAt(1); } |
| Handle<Object> name() const { return name_; } |
| HValue* value() { return OperandAt(2); } |
| StrictModeFlag strict_mode_flag() { return strict_mode_flag_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreGlobalGeneric) |
| |
| private: |
| HStoreGlobalGeneric(HValue* context, |
| HValue* global_object, |
| Handle<Object> name, |
| HValue* value, |
| StrictModeFlag strict_mode_flag) |
| : name_(name), |
| strict_mode_flag_(strict_mode_flag) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, global_object); |
| SetOperandAt(2, value); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Handle<Object> name_; |
| StrictModeFlag strict_mode_flag_; |
| }; |
| |
| |
| class HLoadContextSlot V8_FINAL : public HUnaryOperation { |
| public: |
| enum Mode { |
| // Perform a normal load of the context slot without checking its value. |
| kNoCheck, |
| // Load and check the value of the context slot. Deoptimize if it's the |
| // hole value. This is used for checking for loading of uninitialized |
| // harmony bindings where we deoptimize into full-codegen generated code |
| // which will subsequently throw a reference error. |
| kCheckDeoptimize, |
| // Load and check the value of the context slot. Return undefined if it's |
| // the hole value. This is used for non-harmony const assignments |
| kCheckReturnUndefined |
| }; |
| |
| HLoadContextSlot(HValue* context, Variable* var) |
| : HUnaryOperation(context), slot_index_(var->index()) { |
| ASSERT(var->IsContextSlot()); |
| switch (var->mode()) { |
| case LET: |
| case CONST_HARMONY: |
| mode_ = kCheckDeoptimize; |
| break; |
| case CONST: |
| mode_ = kCheckReturnUndefined; |
| break; |
| default: |
| mode_ = kNoCheck; |
| } |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnContextSlots); |
| } |
| |
| int slot_index() const { return slot_index_; } |
| Mode mode() const { return mode_; } |
| |
| bool DeoptimizesOnHole() { |
| return mode_ == kCheckDeoptimize; |
| } |
| |
| bool RequiresHoleCheck() const { |
| return mode_ != kNoCheck; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HLoadContextSlot* b = HLoadContextSlot::cast(other); |
| return (slot_index() == b->slot_index()); |
| } |
| |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { return !RequiresHoleCheck(); } |
| |
| int slot_index_; |
| Mode mode_; |
| }; |
| |
| |
| class HStoreContextSlot V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| enum Mode { |
| // Perform a normal store to the context slot without checking its previous |
| // value. |
| kNoCheck, |
| // Check the previous value of the context slot and deoptimize if it's the |
| // hole value. This is used for checking for assignments to uninitialized |
| // harmony bindings where we deoptimize into full-codegen generated code |
| // which will subsequently throw a reference error. |
| kCheckDeoptimize, |
| // Check the previous value and ignore assignment if it isn't a hole value |
| kCheckIgnoreAssignment |
| }; |
| |
| DECLARE_INSTRUCTION_FACTORY_P4(HStoreContextSlot, HValue*, int, |
| Mode, HValue*); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* value() { return OperandAt(1); } |
| int slot_index() const { return slot_index_; } |
| Mode mode() const { return mode_; } |
| |
| bool NeedsWriteBarrier() { |
| return StoringValueNeedsWriteBarrier(value()); |
| } |
| |
| bool DeoptimizesOnHole() { |
| return mode_ == kCheckDeoptimize; |
| } |
| |
| bool RequiresHoleCheck() { |
| return mode_ != kNoCheck; |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreContextSlot) |
| |
| private: |
| HStoreContextSlot(HValue* context, int slot_index, Mode mode, HValue* value) |
| : slot_index_(slot_index), mode_(mode) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, value); |
| SetGVNFlag(kChangesContextSlots); |
| } |
| |
| int slot_index_; |
| Mode mode_; |
| }; |
| |
| |
| // Represents an access to a portion of an object, such as the map pointer, |
| // array elements pointer, etc, but not accesses to array elements themselves. |
| class HObjectAccess V8_FINAL { |
| public: |
| inline bool IsInobject() const { |
| return portion() != kBackingStore && portion() != kExternalMemory; |
| } |
| |
| inline bool IsExternalMemory() const { |
| return portion() == kExternalMemory; |
| } |
| |
| inline bool IsStringLength() const { |
| return portion() == kStringLengths; |
| } |
| |
| inline int offset() const { |
| return OffsetField::decode(value_); |
| } |
| |
| inline Representation representation() const { |
| return Representation::FromKind(RepresentationField::decode(value_)); |
| } |
| |
| inline Handle<String> name() const { |
| return name_; |
| } |
| |
| inline HObjectAccess WithRepresentation(Representation representation) { |
| return HObjectAccess(portion(), offset(), representation, name()); |
| } |
| |
| static HObjectAccess ForHeapNumberValue() { |
| return HObjectAccess( |
| kDouble, HeapNumber::kValueOffset, Representation::Double()); |
| } |
| |
| static HObjectAccess ForHeapNumberValueLowestBits() { |
| return HObjectAccess(kDouble, |
| HeapNumber::kValueOffset, |
| Representation::Integer32()); |
| } |
| |
| static HObjectAccess ForHeapNumberValueHighestBits() { |
| return HObjectAccess(kDouble, |
| HeapNumber::kValueOffset + kIntSize, |
| Representation::Integer32()); |
| } |
| |
| static HObjectAccess ForElementsPointer() { |
| return HObjectAccess(kElementsPointer, JSObject::kElementsOffset); |
| } |
| |
| static HObjectAccess ForLiteralsPointer() { |
| return HObjectAccess(kInobject, JSFunction::kLiteralsOffset); |
| } |
| |
| static HObjectAccess ForNextFunctionLinkPointer() { |
| return HObjectAccess(kInobject, JSFunction::kNextFunctionLinkOffset); |
| } |
| |
| static HObjectAccess ForArrayLength(ElementsKind elements_kind) { |
| return HObjectAccess( |
| kArrayLengths, |
| JSArray::kLengthOffset, |
| IsFastElementsKind(elements_kind) && |
| FLAG_track_fields |
| ? Representation::Smi() : Representation::Tagged()); |
| } |
| |
| static HObjectAccess ForAllocationSiteOffset(int offset); |
| |
| static HObjectAccess ForAllocationSiteList() { |
| return HObjectAccess(kExternalMemory, 0, Representation::Tagged()); |
| } |
| |
| static HObjectAccess ForFixedArrayLength() { |
| return HObjectAccess( |
| kArrayLengths, |
| FixedArray::kLengthOffset, |
| FLAG_track_fields ? Representation::Smi() : Representation::Tagged()); |
| } |
| |
| static HObjectAccess ForStringHashField() { |
| return HObjectAccess(kInobject, |
| String::kHashFieldOffset, |
| Representation::Integer32()); |
| } |
| |
| static HObjectAccess ForStringLength() { |
| STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue); |
| return HObjectAccess( |
| kStringLengths, |
| String::kLengthOffset, |
| FLAG_track_fields ? Representation::Smi() : Representation::Tagged()); |
| } |
| |
| static HObjectAccess ForConsStringFirst() { |
| return HObjectAccess(kInobject, ConsString::kFirstOffset); |
| } |
| |
| static HObjectAccess ForConsStringSecond() { |
| return HObjectAccess(kInobject, ConsString::kSecondOffset); |
| } |
| |
| static HObjectAccess ForPropertiesPointer() { |
| return HObjectAccess(kInobject, JSObject::kPropertiesOffset); |
| } |
| |
| static HObjectAccess ForPrototypeOrInitialMap() { |
| return HObjectAccess(kInobject, JSFunction::kPrototypeOrInitialMapOffset); |
| } |
| |
| static HObjectAccess ForSharedFunctionInfoPointer() { |
| return HObjectAccess(kInobject, JSFunction::kSharedFunctionInfoOffset); |
| } |
| |
| static HObjectAccess ForCodeEntryPointer() { |
| return HObjectAccess(kInobject, JSFunction::kCodeEntryOffset); |
| } |
| |
| static HObjectAccess ForCodeOffset() { |
| return HObjectAccess(kInobject, SharedFunctionInfo::kCodeOffset); |
| } |
| |
| static HObjectAccess ForFirstCodeSlot() { |
| return HObjectAccess(kInobject, SharedFunctionInfo::kFirstCodeSlot); |
| } |
| |
| static HObjectAccess ForFirstContextSlot() { |
| return HObjectAccess(kInobject, SharedFunctionInfo::kFirstContextSlot); |
| } |
| |
| static HObjectAccess ForOptimizedCodeMap() { |
| return HObjectAccess(kInobject, |
| SharedFunctionInfo::kOptimizedCodeMapOffset); |
| } |
| |
| static HObjectAccess ForFunctionContextPointer() { |
| return HObjectAccess(kInobject, JSFunction::kContextOffset); |
| } |
| |
| static HObjectAccess ForMap() { |
| return HObjectAccess(kMaps, JSObject::kMapOffset); |
| } |
| |
| static HObjectAccess ForMapInstanceSize() { |
| return HObjectAccess(kInobject, |
| Map::kInstanceSizeOffset, |
| Representation::UInteger8()); |
| } |
| |
| static HObjectAccess ForMapInstanceType() { |
| return HObjectAccess(kInobject, |
| Map::kInstanceTypeOffset, |
| Representation::UInteger8()); |
| } |
| |
| static HObjectAccess ForPropertyCellValue() { |
| return HObjectAccess(kInobject, PropertyCell::kValueOffset); |
| } |
| |
| static HObjectAccess ForCellValue() { |
| return HObjectAccess(kInobject, Cell::kValueOffset); |
| } |
| |
| static HObjectAccess ForAllocationMementoSite() { |
| return HObjectAccess(kInobject, AllocationMemento::kAllocationSiteOffset); |
| } |
| |
| static HObjectAccess ForCounter() { |
| return HObjectAccess(kExternalMemory, 0, Representation::Integer32()); |
| } |
| |
| // Create an access to an offset in a fixed array header. |
| static HObjectAccess ForFixedArrayHeader(int offset); |
| |
| // Create an access to an in-object property in a JSObject. |
| static HObjectAccess ForJSObjectOffset(int offset, |
| Representation representation = Representation::Tagged()); |
| |
| // Create an access to an in-object property in a JSArray. |
| static HObjectAccess ForJSArrayOffset(int offset); |
| |
| static HObjectAccess ForContextSlot(int index); |
| |
| // Create an access to the backing store of an object. |
| static HObjectAccess ForBackingStoreOffset(int offset, |
| Representation representation = Representation::Tagged()); |
| |
| // Create an access to a resolved field (in-object or backing store). |
| static HObjectAccess ForField(Handle<Map> map, |
| LookupResult *lookup, Handle<String> name = Handle<String>::null()); |
| |
| // Create an access for the payload of a Cell or JSGlobalPropertyCell. |
| static HObjectAccess ForCellPayload(Isolate* isolate); |
| |
| static HObjectAccess ForJSTypedArrayLength() { |
| return HObjectAccess::ForJSObjectOffset(JSTypedArray::kLengthOffset); |
| } |
| |
| static HObjectAccess ForJSArrayBufferBackingStore() { |
| return HObjectAccess::ForJSObjectOffset( |
| JSArrayBuffer::kBackingStoreOffset, Representation::External()); |
| } |
| |
| static HObjectAccess ForExternalArrayExternalPointer() { |
| return HObjectAccess::ForJSObjectOffset( |
| ExternalArray::kExternalPointerOffset, Representation::External()); |
| } |
| |
| static HObjectAccess ForJSArrayBufferViewWeakNext() { |
| return HObjectAccess::ForJSObjectOffset(JSArrayBufferView::kWeakNextOffset); |
| } |
| |
| static HObjectAccess ForJSArrayBufferWeakFirstView() { |
| return HObjectAccess::ForJSObjectOffset( |
| JSArrayBuffer::kWeakFirstViewOffset); |
| } |
| |
| static HObjectAccess ForJSArrayBufferViewBuffer() { |
| return HObjectAccess::ForJSObjectOffset(JSArrayBufferView::kBufferOffset); |
| } |
| |
| static HObjectAccess ForJSArrayBufferViewByteOffset() { |
| return HObjectAccess::ForJSObjectOffset( |
| JSArrayBufferView::kByteOffsetOffset); |
| } |
| |
| static HObjectAccess ForJSArrayBufferViewByteLength() { |
| return HObjectAccess::ForJSObjectOffset( |
| JSArrayBufferView::kByteLengthOffset); |
| } |
| |
| void PrintTo(StringStream* stream); |
| |
| inline bool Equals(HObjectAccess that) const { |
| return value_ == that.value_; // portion and offset must match |
| } |
| |
| protected: |
| void SetGVNFlags(HValue *instr, bool is_store); |
| |
| private: |
| // internal use only; different parts of an object or array |
| enum Portion { |
| kMaps, // map of an object |
| kArrayLengths, // the length of an array |
| kStringLengths, // the length of a string |
| kElementsPointer, // elements pointer |
| kBackingStore, // some field in the backing store |
| kDouble, // some double field |
| kInobject, // some other in-object field |
| kExternalMemory // some field in external memory |
| }; |
| |
| HObjectAccess(Portion portion, int offset, |
| Representation representation = Representation::Tagged(), |
| Handle<String> name = Handle<String>::null()) |
| : value_(PortionField::encode(portion) | |
| RepresentationField::encode(representation.kind()) | |
| OffsetField::encode(offset)), |
| name_(name) { |
| // assert that the fields decode correctly |
| ASSERT(this->offset() == offset); |
| ASSERT(this->portion() == portion); |
| ASSERT(RepresentationField::decode(value_) == representation.kind()); |
| } |
| |
| class PortionField : public BitField<Portion, 0, 3> {}; |
| class RepresentationField : public BitField<Representation::Kind, 3, 4> {}; |
| class OffsetField : public BitField<int, 7, 25> {}; |
| |
| uint32_t value_; // encodes portion, representation, and offset |
| Handle<String> name_; |
| |
| friend class HLoadNamedField; |
| friend class HStoreNamedField; |
| |
| inline Portion portion() const { |
| return PortionField::decode(value_); |
| } |
| }; |
| |
| |
| class HLoadNamedField V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HLoadNamedField, HValue*, HObjectAccess); |
| |
| HValue* object() { return OperandAt(0); } |
| bool HasTypeCheck() { return object()->IsCheckMaps(); } |
| HObjectAccess access() const { return access_; } |
| Representation field_representation() const { |
| return access_.representation(); |
| } |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { return false; } |
| virtual bool HasOutOfBoundsAccess(int size) V8_OVERRIDE { |
| return !access().IsInobject() || access().offset() >= size; |
| } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| if (index == 0 && access().IsExternalMemory()) { |
| // object must be external in case of external memory access |
| return Representation::External(); |
| } |
| return Representation::Tagged(); |
| } |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadNamedField) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HLoadNamedField* b = HLoadNamedField::cast(other); |
| return access_.Equals(b->access_); |
| } |
| |
| private: |
| HLoadNamedField(HValue* object, HObjectAccess access) : access_(access) { |
| ASSERT(object != NULL); |
| SetOperandAt(0, object); |
| |
| Representation representation = access.representation(); |
| if (representation.IsInteger8() || |
| representation.IsUInteger8() || |
| representation.IsInteger16() || |
| representation.IsUInteger16()) { |
| set_representation(Representation::Integer32()); |
| } else if (representation.IsSmi()) { |
| set_type(HType::Smi()); |
| if (SmiValuesAre32Bits()) { |
| set_representation(Representation::Integer32()); |
| } else { |
| set_representation(representation); |
| } |
| } else if (representation.IsDouble() || |
| representation.IsExternal() || |
| representation.IsInteger32()) { |
| set_representation(representation); |
| } else if (FLAG_track_heap_object_fields && |
| representation.IsHeapObject()) { |
| set_type(HType::NonPrimitive()); |
| set_representation(Representation::Tagged()); |
| } else { |
| set_representation(Representation::Tagged()); |
| } |
| access.SetGVNFlags(this, false); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| HObjectAccess access_; |
| }; |
| |
| |
| class HLoadNamedGeneric V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HLoadNamedGeneric, HValue*, |
| Handle<Object>); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* object() { return OperandAt(1); } |
| Handle<Object> name() const { return name_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric) |
| |
| private: |
| HLoadNamedGeneric(HValue* context, HValue* object, Handle<Object> name) |
| : name_(name) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, object); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| |
| Handle<Object> name_; |
| }; |
| |
| |
| class HLoadFunctionPrototype V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HLoadFunctionPrototype, HValue*); |
| |
| HValue* function() { return OperandAt(0); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| explicit HLoadFunctionPrototype(HValue* function) |
| : HUnaryOperation(function) { |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnCalls); |
| } |
| }; |
| |
| class ArrayInstructionInterface { |
| public: |
| virtual HValue* GetKey() = 0; |
| virtual void SetKey(HValue* key) = 0; |
| virtual void SetIndexOffset(uint32_t index_offset) = 0; |
| virtual int MaxIndexOffsetBits() = 0; |
| virtual bool IsDehoisted() = 0; |
| virtual void SetDehoisted(bool is_dehoisted) = 0; |
| virtual ~ArrayInstructionInterface() { }; |
| |
| static Representation KeyedAccessIndexRequirement(Representation r) { |
| return r.IsInteger32() || SmiValuesAre32Bits() |
| ? Representation::Integer32() : Representation::Smi(); |
| } |
| }; |
| |
| |
| enum LoadKeyedHoleMode { |
| NEVER_RETURN_HOLE, |
| ALLOW_RETURN_HOLE |
| }; |
| |
| |
| class HLoadKeyed V8_FINAL |
| : public HTemplateInstruction<3>, public ArrayInstructionInterface { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P4(HLoadKeyed, HValue*, HValue*, HValue*, |
| ElementsKind); |
| DECLARE_INSTRUCTION_FACTORY_P5(HLoadKeyed, HValue*, HValue*, HValue*, |
| ElementsKind, LoadKeyedHoleMode); |
| |
| bool is_external() const { |
| return IsExternalArrayElementsKind(elements_kind()); |
| } |
| HValue* elements() { return OperandAt(0); } |
| HValue* key() { return OperandAt(1); } |
| HValue* dependency() { |
| ASSERT(HasDependency()); |
| return OperandAt(2); |
| } |
| bool HasDependency() const { return OperandAt(0) != OperandAt(2); } |
| uint32_t index_offset() { return IndexOffsetField::decode(bit_field_); } |
| void SetIndexOffset(uint32_t index_offset) { |
| bit_field_ = IndexOffsetField::update(bit_field_, index_offset); |
| } |
| virtual int MaxIndexOffsetBits() { |
| return kBitsForIndexOffset; |
| } |
| HValue* GetKey() { return key(); } |
| void SetKey(HValue* key) { SetOperandAt(1, key); } |
| bool IsDehoisted() { return IsDehoistedField::decode(bit_field_); } |
| void SetDehoisted(bool is_dehoisted) { |
| bit_field_ = IsDehoistedField::update(bit_field_, is_dehoisted); |
| } |
| ElementsKind elements_kind() const { |
| return ElementsKindField::decode(bit_field_); |
| } |
| LoadKeyedHoleMode hole_mode() const { |
| return HoleModeField::decode(bit_field_); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // kind_fast: tagged[int32] (none) |
| // kind_double: tagged[int32] (none) |
| // kind_external: external[int32] (none) |
| if (index == 0) { |
| return is_external() ? Representation::External() |
| : Representation::Tagged(); |
| } |
| if (index == 1) { |
| return ArrayInstructionInterface::KeyedAccessIndexRequirement( |
| OperandAt(1)->representation()); |
| } |
| return Representation::None(); |
| } |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| return RequiredInputRepresentation(index); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| bool UsesMustHandleHole() const; |
| bool AllUsesCanTreatHoleAsNaN() const; |
| bool RequiresHoleCheck() const; |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadKeyed) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| if (!other->IsLoadKeyed()) return false; |
| HLoadKeyed* other_load = HLoadKeyed::cast(other); |
| |
| if (IsDehoisted() && index_offset() != other_load->index_offset()) |
| return false; |
| return elements_kind() == other_load->elements_kind(); |
| } |
| |
| private: |
| HLoadKeyed(HValue* obj, |
| HValue* key, |
| HValue* dependency, |
| ElementsKind elements_kind, |
| LoadKeyedHoleMode mode = NEVER_RETURN_HOLE) |
| : bit_field_(0) { |
| bit_field_ = ElementsKindField::encode(elements_kind) | |
| HoleModeField::encode(mode); |
| |
| SetOperandAt(0, obj); |
| SetOperandAt(1, key); |
| SetOperandAt(2, dependency != NULL ? dependency : obj); |
| |
| if (!is_external()) { |
| // I can detect the case between storing double (holey and fast) and |
| // smi/object by looking at elements_kind_. |
| ASSERT(IsFastSmiOrObjectElementsKind(elements_kind) || |
| IsFastDoubleElementsKind(elements_kind)); |
| |
| if (IsFastSmiOrObjectElementsKind(elements_kind)) { |
| if (IsFastSmiElementsKind(elements_kind) && |
| (!IsHoleyElementsKind(elements_kind) || |
| mode == NEVER_RETURN_HOLE)) { |
| set_type(HType::Smi()); |
| if (SmiValuesAre32Bits() && !RequiresHoleCheck()) { |
| set_representation(Representation::Integer32()); |
| } else { |
| set_representation(Representation::Smi()); |
| } |
| } else { |
| set_representation(Representation::Tagged()); |
| } |
| |
| SetGVNFlag(kDependsOnArrayElements); |
| } else { |
| set_representation(Representation::Double()); |
| SetGVNFlag(kDependsOnDoubleArrayElements); |
| } |
| } else { |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS || |
| elements_kind == EXTERNAL_DOUBLE_ELEMENTS) { |
| set_representation(Representation::Double()); |
| } else { |
| set_representation(Representation::Integer32()); |
| } |
| |
| SetGVNFlag(kDependsOnExternalMemory); |
| // Native code could change the specialized array. |
| SetGVNFlag(kDependsOnCalls); |
| } |
| |
| SetFlag(kUseGVN); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return !RequiresHoleCheck(); |
| } |
| |
| // Establish some checks around our packed fields |
| enum LoadKeyedBits { |
| kBitsForElementsKind = 5, |
| kBitsForHoleMode = 1, |
| kBitsForIndexOffset = 25, |
| kBitsForIsDehoisted = 1, |
| |
| kStartElementsKind = 0, |
| kStartHoleMode = kStartElementsKind + kBitsForElementsKind, |
| kStartIndexOffset = kStartHoleMode + kBitsForHoleMode, |
| kStartIsDehoisted = kStartIndexOffset + kBitsForIndexOffset |
| }; |
| |
| STATIC_ASSERT((kBitsForElementsKind + kBitsForIndexOffset + |
| kBitsForIsDehoisted) <= sizeof(uint32_t)*8); |
| STATIC_ASSERT(kElementsKindCount <= (1 << kBitsForElementsKind)); |
| class ElementsKindField: |
| public BitField<ElementsKind, kStartElementsKind, kBitsForElementsKind> |
| {}; // NOLINT |
| class HoleModeField: |
| public BitField<LoadKeyedHoleMode, kStartHoleMode, kBitsForHoleMode> |
| {}; // NOLINT |
| class IndexOffsetField: |
| public BitField<uint32_t, kStartIndexOffset, kBitsForIndexOffset> |
| {}; // NOLINT |
| class IsDehoistedField: |
| public BitField<bool, kStartIsDehoisted, kBitsForIsDehoisted> |
| {}; // NOLINT |
| uint32_t bit_field_; |
| }; |
| |
| |
| class HLoadKeyedGeneric V8_FINAL : public HTemplateInstruction<3> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HLoadKeyedGeneric, HValue*, |
| HValue*); |
| HValue* object() { return OperandAt(0); } |
| HValue* key() { return OperandAt(1); } |
| HValue* context() { return OperandAt(2); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // tagged[tagged] |
| return Representation::Tagged(); |
| } |
| |
| virtual HValue* Canonicalize() V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric) |
| |
| private: |
| HLoadKeyedGeneric(HValue* context, HValue* obj, HValue* key) { |
| set_representation(Representation::Tagged()); |
| SetOperandAt(0, obj); |
| SetOperandAt(1, key); |
| SetOperandAt(2, context); |
| SetAllSideEffects(); |
| } |
| }; |
| |
| |
| // Indicates whether the store is a store to an entry that was previously |
| // initialized or not. |
| enum StoreFieldOrKeyedMode { |
| INITIALIZING_STORE, |
| STORE_TO_INITIALIZED_ENTRY |
| }; |
| |
| |
| class HStoreNamedField V8_FINAL : public HTemplateInstruction<3> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P3(HStoreNamedField, HValue*, |
| HObjectAccess, HValue*); |
| DECLARE_INSTRUCTION_FACTORY_P4(HStoreNamedField, HValue*, |
| HObjectAccess, HValue*, StoreFieldOrKeyedMode); |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreNamedField) |
| |
| virtual bool HasEscapingOperandAt(int index) V8_OVERRIDE { |
| return index == 1; |
| } |
| virtual bool HasOutOfBoundsAccess(int size) V8_OVERRIDE { |
| return !access().IsInobject() || access().offset() >= size; |
| } |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| if (index == 0 && access().IsExternalMemory()) { |
| // object must be external in case of external memory access |
| return Representation::External(); |
| } else if (index == 1) { |
| if (field_representation().IsInteger8() || |
| field_representation().IsUInteger8() || |
| field_representation().IsInteger16() || |
| field_representation().IsUInteger16() || |
| field_representation().IsInteger32()) { |
| return Representation::Integer32(); |
| } else if (field_representation().IsDouble()) { |
| return field_representation(); |
| } else if (field_representation().IsSmi()) { |
| if (SmiValuesAre32Bits() && store_mode_ == STORE_TO_INITIALIZED_ENTRY) { |
| return Representation::Integer32(); |
| } |
| return field_representation(); |
| } else if (field_representation().IsExternal()) { |
| return Representation::External(); |
| } |
| } |
| return Representation::Tagged(); |
| } |
| virtual void HandleSideEffectDominator(GVNFlag side_effect, |
| HValue* dominator) V8_OVERRIDE { |
| ASSERT(side_effect == kChangesNewSpacePromotion); |
| new_space_dominator_ = dominator; |
| } |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| void SkipWriteBarrier() { write_barrier_mode_ = SKIP_WRITE_BARRIER; } |
| bool IsSkipWriteBarrier() const { |
| return write_barrier_mode_ == SKIP_WRITE_BARRIER; |
| } |
| |
| HValue* object() const { return OperandAt(0); } |
| HValue* value() const { return OperandAt(1); } |
| HValue* transition() const { return OperandAt(2); } |
| |
| HObjectAccess access() const { return access_; } |
| HValue* new_space_dominator() const { return new_space_dominator_; } |
| bool has_transition() const { return has_transition_; } |
| StoreFieldOrKeyedMode store_mode() const { return store_mode_; } |
| |
| Handle<Map> transition_map() const { |
| if (has_transition()) { |
| return Handle<Map>::cast( |
| HConstant::cast(transition())->handle(Isolate::Current())); |
| } else { |
| return Handle<Map>(); |
| } |
| } |
| |
| void SetTransition(HConstant* map_constant, CompilationInfo* info) { |
| ASSERT(!has_transition()); // Only set once. |
| Handle<Map> map = Handle<Map>::cast(map_constant->handle(info->isolate())); |
| if (map->CanBeDeprecated()) { |
| map->AddDependentCompilationInfo(DependentCode::kTransitionGroup, info); |
| } |
| SetOperandAt(2, map_constant); |
| has_transition_ = true; |
| } |
| |
| bool NeedsWriteBarrier() { |
| ASSERT(!(FLAG_track_double_fields && field_representation().IsDouble()) || |
| !has_transition()); |
| if (IsSkipWriteBarrier()) return false; |
| if (field_representation().IsDouble()) return false; |
| if (field_representation().IsSmi()) return false; |
| if (field_representation().IsInteger32()) return false; |
| if (field_representation().IsExternal()) return false; |
| return StoringValueNeedsWriteBarrier(value()) && |
| ReceiverObjectNeedsWriteBarrier(object(), value(), |
| new_space_dominator()); |
| } |
| |
| bool NeedsWriteBarrierForMap() { |
| if (IsSkipWriteBarrier()) return false; |
| return ReceiverObjectNeedsWriteBarrier(object(), transition(), |
| new_space_dominator()); |
| } |
| |
| Representation field_representation() const { |
| return access_.representation(); |
| } |
| |
| void UpdateValue(HValue* value) { |
| SetOperandAt(1, value); |
| } |
| |
| private: |
| HStoreNamedField(HValue* obj, |
| HObjectAccess access, |
| HValue* val, |
| StoreFieldOrKeyedMode store_mode = INITIALIZING_STORE) |
| : access_(access), |
| new_space_dominator_(NULL), |
| write_barrier_mode_(UPDATE_WRITE_BARRIER), |
| has_transition_(false), |
| store_mode_(store_mode) { |
| SetOperandAt(0, obj); |
| SetOperandAt(1, val); |
| SetOperandAt(2, obj); |
| access.SetGVNFlags(this, true); |
| } |
| |
| HObjectAccess access_; |
| HValue* new_space_dominator_; |
| WriteBarrierMode write_barrier_mode_ : 1; |
| bool has_transition_ : 1; |
| StoreFieldOrKeyedMode store_mode_ : 1; |
| }; |
| |
| |
| class HStoreNamedGeneric V8_FINAL : public HTemplateInstruction<3> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HStoreNamedGeneric, HValue*, |
| Handle<String>, HValue*, |
| StrictModeFlag); |
| HValue* object() { return OperandAt(0); } |
| HValue* value() { return OperandAt(1); } |
| HValue* context() { return OperandAt(2); } |
| Handle<String> name() { return name_; } |
| StrictModeFlag strict_mode_flag() { return strict_mode_flag_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric) |
| |
| private: |
| HStoreNamedGeneric(HValue* context, |
| HValue* object, |
| Handle<String> name, |
| HValue* value, |
| StrictModeFlag strict_mode_flag) |
| : name_(name), |
| strict_mode_flag_(strict_mode_flag) { |
| SetOperandAt(0, object); |
| SetOperandAt(1, value); |
| SetOperandAt(2, context); |
| SetAllSideEffects(); |
| } |
| |
| Handle<String> name_; |
| StrictModeFlag strict_mode_flag_; |
| }; |
| |
| |
| class HStoreKeyed V8_FINAL |
| : public HTemplateInstruction<3>, public ArrayInstructionInterface { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P4(HStoreKeyed, HValue*, HValue*, HValue*, |
| ElementsKind); |
| DECLARE_INSTRUCTION_FACTORY_P5(HStoreKeyed, HValue*, HValue*, HValue*, |
| ElementsKind, StoreFieldOrKeyedMode); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // kind_fast: tagged[int32] = tagged |
| // kind_double: tagged[int32] = double |
| // kind_smi : tagged[int32] = smi |
| // kind_external: external[int32] = (double | int32) |
| if (index == 0) { |
| return is_external() ? Representation::External() |
| : Representation::Tagged(); |
| } else if (index == 1) { |
| return ArrayInstructionInterface::KeyedAccessIndexRequirement( |
| OperandAt(1)->representation()); |
| } |
| |
| ASSERT_EQ(index, 2); |
| if (IsDoubleOrFloatElementsKind(elements_kind())) { |
| return Representation::Double(); |
| } |
| if (SmiValuesAre32Bits() && store_mode_ == STORE_TO_INITIALIZED_ENTRY) { |
| return Representation::Integer32(); |
| } |
| if (IsFastSmiElementsKind(elements_kind())) { |
| return Representation::Smi(); |
| } |
| |
| return is_external() ? Representation::Integer32() |
| : Representation::Tagged(); |
| } |
| |
| bool is_external() const { |
| return IsExternalArrayElementsKind(elements_kind()); |
| } |
| |
| virtual Representation observed_input_representation(int index) V8_OVERRIDE { |
| if (index < 2) return RequiredInputRepresentation(index); |
| if (IsUninitialized()) { |
| return Representation::None(); |
| } |
| if (IsDoubleOrFloatElementsKind(elements_kind())) { |
| return Representation::Double(); |
| } |
| if (SmiValuesAre32Bits() && store_mode_ == STORE_TO_INITIALIZED_ENTRY) { |
| return Representation::Integer32(); |
| } |
| if (IsFastSmiElementsKind(elements_kind())) { |
| return Representation::Smi(); |
| } |
| if (is_external()) { |
| return Representation::Integer32(); |
| } |
| // For fast object elements kinds, don't assume anything. |
| return Representation::None(); |
| } |
| |
| HValue* elements() { return OperandAt(0); } |
| HValue* key() { return OperandAt(1); } |
| HValue* value() { return OperandAt(2); } |
| bool value_is_smi() const { |
| return IsFastSmiElementsKind(elements_kind_); |
| } |
| StoreFieldOrKeyedMode store_mode() const { return store_mode_; } |
| ElementsKind elements_kind() const { return elements_kind_; } |
| uint32_t index_offset() { return index_offset_; } |
| void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; } |
| virtual int MaxIndexOffsetBits() { |
| return 31 - ElementsKindToShiftSize(elements_kind_); |
| } |
| HValue* GetKey() { return key(); } |
| void SetKey(HValue* key) { SetOperandAt(1, key); } |
| bool IsDehoisted() { return is_dehoisted_; } |
| void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; } |
| bool IsUninitialized() { return is_uninitialized_; } |
| void SetUninitialized(bool is_uninitialized) { |
| is_uninitialized_ = is_uninitialized; |
| } |
| |
| bool IsConstantHoleStore() { |
| return value()->IsConstant() && HConstant::cast(value())->IsTheHole(); |
| } |
| |
| virtual void HandleSideEffectDominator(GVNFlag side_effect, |
| HValue* dominator) V8_OVERRIDE { |
| ASSERT(side_effect == kChangesNewSpacePromotion); |
| new_space_dominator_ = dominator; |
| } |
| |
| HValue* new_space_dominator() const { return new_space_dominator_; } |
| |
| bool NeedsWriteBarrier() { |
| if (value_is_smi()) { |
| return false; |
| } else { |
| return StoringValueNeedsWriteBarrier(value()) && |
| ReceiverObjectNeedsWriteBarrier(elements(), value(), |
| new_space_dominator()); |
| } |
| } |
| |
| bool NeedsCanonicalization(); |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreKeyed) |
| |
| private: |
| HStoreKeyed(HValue* obj, HValue* key, HValue* val, |
| ElementsKind elements_kind, |
| StoreFieldOrKeyedMode store_mode = INITIALIZING_STORE) |
| : elements_kind_(elements_kind), |
| index_offset_(0), |
| is_dehoisted_(false), |
| is_uninitialized_(false), |
| store_mode_(store_mode), |
| new_space_dominator_(NULL) { |
| SetOperandAt(0, obj); |
| SetOperandAt(1, key); |
| SetOperandAt(2, val); |
| |
| ASSERT(store_mode != STORE_TO_INITIALIZED_ENTRY || |
| elements_kind == FAST_SMI_ELEMENTS); |
| |
| if (IsFastObjectElementsKind(elements_kind)) { |
| SetFlag(kTrackSideEffectDominators); |
| SetGVNFlag(kDependsOnNewSpacePromotion); |
| } |
| if (is_external()) { |
| SetGVNFlag(kChangesExternalMemory); |
| SetFlag(kAllowUndefinedAsNaN); |
| } else if (IsFastDoubleElementsKind(elements_kind)) { |
| SetGVNFlag(kChangesDoubleArrayElements); |
| } else if (IsFastSmiElementsKind(elements_kind)) { |
| SetGVNFlag(kChangesArrayElements); |
| } else { |
| SetGVNFlag(kChangesArrayElements); |
| } |
| |
| // EXTERNAL_{UNSIGNED_,}{BYTE,SHORT,INT}_ELEMENTS are truncating. |
| if (elements_kind >= EXTERNAL_BYTE_ELEMENTS && |
| elements_kind <= EXTERNAL_UNSIGNED_INT_ELEMENTS) { |
| SetFlag(kTruncatingToInt32); |
| } |
| } |
| |
| ElementsKind elements_kind_; |
| uint32_t index_offset_; |
| bool is_dehoisted_ : 1; |
| bool is_uninitialized_ : 1; |
| StoreFieldOrKeyedMode store_mode_: 1; |
| HValue* new_space_dominator_; |
| }; |
| |
| |
| class HStoreKeyedGeneric V8_FINAL : public HTemplateInstruction<4> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HStoreKeyedGeneric, HValue*, |
| HValue*, HValue*, StrictModeFlag); |
| |
| HValue* object() { return OperandAt(0); } |
| HValue* key() { return OperandAt(1); } |
| HValue* value() { return OperandAt(2); } |
| HValue* context() { return OperandAt(3); } |
| StrictModeFlag strict_mode_flag() { return strict_mode_flag_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| // tagged[tagged] = tagged |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric) |
| |
| private: |
| HStoreKeyedGeneric(HValue* context, |
| HValue* object, |
| HValue* key, |
| HValue* value, |
| StrictModeFlag strict_mode_flag) |
| : strict_mode_flag_(strict_mode_flag) { |
| SetOperandAt(0, object); |
| SetOperandAt(1, key); |
| SetOperandAt(2, value); |
| SetOperandAt(3, context); |
| SetAllSideEffects(); |
| } |
| |
| StrictModeFlag strict_mode_flag_; |
| }; |
| |
| |
| class HTransitionElementsKind V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| inline static HTransitionElementsKind* New(Zone* zone, |
| HValue* context, |
| HValue* object, |
| Handle<Map> original_map, |
| Handle<Map> transitioned_map) { |
| return new(zone) HTransitionElementsKind(context, object, |
| original_map, transitioned_map); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* object() { return OperandAt(0); } |
| HValue* context() { return OperandAt(1); } |
| Unique<Map> original_map() { return original_map_; } |
| Unique<Map> transitioned_map() { return transitioned_map_; } |
| ElementsKind from_kind() { return from_kind_; } |
| ElementsKind to_kind() { return to_kind_; } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| DECLARE_CONCRETE_INSTRUCTION(TransitionElementsKind) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| HTransitionElementsKind* instr = HTransitionElementsKind::cast(other); |
| return original_map_ == instr->original_map_ && |
| transitioned_map_ == instr->transitioned_map_; |
| } |
| |
| private: |
| HTransitionElementsKind(HValue* context, |
| HValue* object, |
| Handle<Map> original_map, |
| Handle<Map> transitioned_map) |
| : original_map_(Unique<Map>(original_map)), |
| transitioned_map_(Unique<Map>(transitioned_map)), |
| from_kind_(original_map->elements_kind()), |
| to_kind_(transitioned_map->elements_kind()) { |
| SetOperandAt(0, object); |
| SetOperandAt(1, context); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kChangesElementsKind); |
| if (!IsSimpleMapChangeTransition(from_kind_, to_kind_)) { |
| SetGVNFlag(kChangesElementsPointer); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| set_representation(Representation::Tagged()); |
| } |
| |
| Unique<Map> original_map_; |
| Unique<Map> transitioned_map_; |
| ElementsKind from_kind_; |
| ElementsKind to_kind_; |
| }; |
| |
| |
| class HStringAdd V8_FINAL : public HBinaryOperation { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* left, |
| HValue* right, |
| StringAddFlags flags = STRING_ADD_CHECK_NONE); |
| |
| StringAddFlags flags() const { return flags_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StringAdd) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| private: |
| HStringAdd(HValue* context, HValue* left, HValue* right, StringAddFlags flags) |
| : HBinaryOperation(context, left, right, HType::String()), flags_(flags) { |
| set_representation(Representation::Tagged()); |
| if (MightHaveSideEffects()) { |
| SetAllSideEffects(); |
| } else { |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnMaps); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| } |
| |
| bool MightHaveSideEffects() const { |
| return flags_ != STRING_ADD_CHECK_NONE && |
| (left()->ToStringCanBeObserved() || right()->ToStringCanBeObserved()); |
| } |
| |
| // No side-effects except possible allocation: |
| // NOTE: this instruction does not call ToString() on its inputs, when flags_ |
| // is set to STRING_ADD_CHECK_NONE. |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return !MightHaveSideEffects(); |
| } |
| |
| const StringAddFlags flags_; |
| }; |
| |
| |
| class HStringCharCodeAt V8_FINAL : public HTemplateInstruction<3> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HStringCharCodeAt, |
| HValue*, |
| HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) { |
| // The index is supposed to be Integer32. |
| return index == 2 |
| ? Representation::Integer32() |
| : Representation::Tagged(); |
| } |
| |
| HValue* context() const { return OperandAt(0); } |
| HValue* string() const { return OperandAt(1); } |
| HValue* index() const { return OperandAt(2); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE { |
| return new(zone) Range(0, String::kMaxUtf16CodeUnit); |
| } |
| |
| private: |
| HStringCharCodeAt(HValue* context, HValue* string, HValue* index) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, string); |
| SetOperandAt(2, index); |
| set_representation(Representation::Integer32()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnMaps); |
| SetGVNFlag(kDependsOnStringChars); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| // No side effects: runtime function assumes string + number inputs. |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HStringCharFromCode V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| HValue* char_code); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return index == 0 |
| ? Representation::Tagged() |
| : Representation::Integer32(); |
| } |
| |
| HValue* context() const { return OperandAt(0); } |
| HValue* value() const { return OperandAt(1); } |
| |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
| |
| DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode) |
| |
| private: |
| HStringCharFromCode(HValue* context, HValue* char_code) |
| : HTemplateInstruction<2>(HType::String()) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, char_code); |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { |
| return !value()->ToNumberCanBeObserved(); |
| } |
| }; |
| |
| |
| template <int V> |
| class HMaterializedLiteral : public HTemplateInstruction<V> { |
| public: |
| HMaterializedLiteral<V>(int index, int depth, AllocationSiteMode mode) |
| : literal_index_(index), depth_(depth), allocation_site_mode_(mode) { |
| this->set_representation(Representation::Tagged()); |
| } |
| |
| HMaterializedLiteral<V>(int index, int depth) |
| : literal_index_(index), depth_(depth), |
| allocation_site_mode_(DONT_TRACK_ALLOCATION_SITE) { |
| this->set_representation(Representation::Tagged()); |
| } |
| |
| int literal_index() const { return literal_index_; } |
| int depth() const { return depth_; } |
| AllocationSiteMode allocation_site_mode() const { |
| return allocation_site_mode_; |
| } |
| |
| private: |
| virtual bool IsDeletable() const V8_FINAL V8_OVERRIDE { return true; } |
| |
| int literal_index_; |
| int depth_; |
| AllocationSiteMode allocation_site_mode_; |
| }; |
| |
| |
| class HRegExpLiteral V8_FINAL : public HMaterializedLiteral<1> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4(HRegExpLiteral, |
| Handle<FixedArray>, |
| Handle<String>, |
| Handle<String>, |
| int); |
| |
| HValue* context() { return OperandAt(0); } |
| Handle<FixedArray> literals() { return literals_; } |
| Handle<String> pattern() { return pattern_; } |
| Handle<String> flags() { return flags_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(RegExpLiteral) |
| |
| private: |
| HRegExpLiteral(HValue* context, |
| Handle<FixedArray> literals, |
| Handle<String> pattern, |
| Handle<String> flags, |
| int literal_index) |
| : HMaterializedLiteral<1>(literal_index, 0), |
| literals_(literals), |
| pattern_(pattern), |
| flags_(flags) { |
| SetOperandAt(0, context); |
| SetAllSideEffects(); |
| set_type(HType::JSObject()); |
| } |
| |
| Handle<FixedArray> literals_; |
| Handle<String> pattern_; |
| Handle<String> flags_; |
| }; |
| |
| |
| class HFunctionLiteral V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HFunctionLiteral, |
| Handle<SharedFunctionInfo>, |
| bool); |
| HValue* context() { return OperandAt(0); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(FunctionLiteral) |
| |
| Handle<SharedFunctionInfo> shared_info() const { return shared_info_; } |
| bool pretenure() const { return pretenure_; } |
| bool has_no_literals() const { return has_no_literals_; } |
| bool is_generator() const { return is_generator_; } |
| LanguageMode language_mode() const { return language_mode_; } |
| |
| private: |
| HFunctionLiteral(HValue* context, |
| Handle<SharedFunctionInfo> shared, |
| bool pretenure) |
| : HTemplateInstruction<1>(HType::JSObject()), |
| shared_info_(shared), |
| pretenure_(pretenure), |
| has_no_literals_(shared->num_literals() == 0), |
| is_generator_(shared->is_generator()), |
| language_mode_(shared->language_mode()) { |
| SetOperandAt(0, context); |
| set_representation(Representation::Tagged()); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| Handle<SharedFunctionInfo> shared_info_; |
| bool pretenure_ : 1; |
| bool has_no_literals_ : 1; |
| bool is_generator_ : 1; |
| LanguageMode language_mode_; |
| }; |
| |
| |
| class HTypeof V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(HTypeof, HValue*); |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* value() { return OperandAt(1); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(Typeof) |
| |
| private: |
| explicit HTypeof(HValue* context, HValue* value) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, value); |
| set_representation(Representation::Tagged()); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HTrapAllocationMemento V8_FINAL : public HTemplateInstruction<1> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HTrapAllocationMemento, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* object() { return OperandAt(0); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(TrapAllocationMemento) |
| |
| private: |
| explicit HTrapAllocationMemento(HValue* obj) { |
| SetOperandAt(0, obj); |
| } |
| }; |
| |
| |
| class HToFastProperties V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HToFastProperties, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ToFastProperties) |
| |
| private: |
| explicit HToFastProperties(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Tagged()); |
| SetGVNFlag(kChangesNewSpacePromotion); |
| |
| // This instruction is not marked as kChangesMaps, but does |
| // change the map of the input operand. Use it only when creating |
| // object literals via a runtime call. |
| ASSERT(value->IsCallRuntime()); |
| #ifdef DEBUG |
| const Runtime::Function* function = HCallRuntime::cast(value)->function(); |
| ASSERT(function->function_id == Runtime::kCreateObjectLiteral); |
| #endif |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HValueOf V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P1(HValueOf, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ValueOf) |
| |
| private: |
| explicit HValueOf(HValue* value) : HUnaryOperation(value) { |
| set_representation(Representation::Tagged()); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| class HDateField V8_FINAL : public HUnaryOperation { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HDateField, HValue*, Smi*); |
| |
| Smi* index() const { return index_; } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(DateField) |
| |
| private: |
| HDateField(HValue* date, Smi* index) |
| : HUnaryOperation(date), index_(index) { |
| set_representation(Representation::Tagged()); |
| } |
| |
| Smi* index_; |
| }; |
| |
| |
| class HSeqStringGetChar V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| static HInstruction* New(Zone* zone, |
| HValue* context, |
| String::Encoding encoding, |
| HValue* string, |
| HValue* index); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return (index == 0) ? Representation::Tagged() |
| : Representation::Integer32(); |
| } |
| |
| String::Encoding encoding() const { return encoding_; } |
| HValue* string() const { return OperandAt(0); } |
| HValue* index() const { return OperandAt(1); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(SeqStringGetChar) |
| |
| protected: |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return encoding() == HSeqStringGetChar::cast(other)->encoding(); |
| } |
| |
| virtual Range* InferRange(Zone* zone) V8_OVERRIDE { |
| if (encoding() == String::ONE_BYTE_ENCODING) { |
| return new(zone) Range(0, String::kMaxOneByteCharCode); |
| } else { |
| ASSERT_EQ(String::TWO_BYTE_ENCODING, encoding()); |
| return new(zone) Range(0, String::kMaxUtf16CodeUnit); |
| } |
| } |
| |
| private: |
| HSeqStringGetChar(String::Encoding encoding, |
| HValue* string, |
| HValue* index) : encoding_(encoding) { |
| SetOperandAt(0, string); |
| SetOperandAt(1, index); |
| set_representation(Representation::Integer32()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnStringChars); |
| } |
| |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| |
| String::Encoding encoding_; |
| }; |
| |
| |
| class HSeqStringSetChar V8_FINAL : public HTemplateInstruction<4> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P4( |
| HSeqStringSetChar, String::Encoding, |
| HValue*, HValue*, HValue*); |
| |
| String::Encoding encoding() { return encoding_; } |
| HValue* context() { return OperandAt(0); } |
| HValue* string() { return OperandAt(1); } |
| HValue* index() { return OperandAt(2); } |
| HValue* value() { return OperandAt(3); } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return (index <= 1) ? Representation::Tagged() |
| : Representation::Integer32(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar) |
| |
| private: |
| HSeqStringSetChar(HValue* context, |
| String::Encoding encoding, |
| HValue* string, |
| HValue* index, |
| HValue* value) : encoding_(encoding) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, string); |
| SetOperandAt(2, index); |
| SetOperandAt(3, value); |
| set_representation(Representation::Tagged()); |
| SetGVNFlag(kChangesStringChars); |
| } |
| |
| String::Encoding encoding_; |
| }; |
| |
| |
| class HCheckMapValue V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P2(HCheckMapValue, HValue*, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HType CalculateInferredType() V8_OVERRIDE { |
| return HType::Tagged(); |
| } |
| |
| HValue* value() { return OperandAt(0); } |
| HValue* map() { return OperandAt(1); } |
| |
| DECLARE_CONCRETE_INSTRUCTION(CheckMapValue) |
| |
| protected: |
| virtual int RedefinedOperandIndex() { return 0; } |
| |
| virtual bool DataEquals(HValue* other) V8_OVERRIDE { |
| return true; |
| } |
| |
| private: |
| HCheckMapValue(HValue* value, |
| HValue* map) { |
| SetOperandAt(0, value); |
| SetOperandAt(1, map); |
| set_representation(Representation::Tagged()); |
| SetFlag(kUseGVN); |
| SetGVNFlag(kDependsOnMaps); |
| SetGVNFlag(kDependsOnElementsKind); |
| } |
| }; |
| |
| |
| class HForInPrepareMap V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P1(HForInPrepareMap, HValue*); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* context() { return OperandAt(0); } |
| HValue* enumerable() { return OperandAt(1); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HType CalculateInferredType() V8_OVERRIDE { |
| return HType::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ForInPrepareMap); |
| |
| private: |
| HForInPrepareMap(HValue* context, |
| HValue* object) { |
| SetOperandAt(0, context); |
| SetOperandAt(1, object); |
| set_representation(Representation::Tagged()); |
| SetAllSideEffects(); |
| } |
| }; |
| |
| |
| class HForInCacheArray V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| DECLARE_INSTRUCTION_FACTORY_P3(HForInCacheArray, HValue*, HValue*, int); |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* enumerable() { return OperandAt(0); } |
| HValue* map() { return OperandAt(1); } |
| int idx() { return idx_; } |
| |
| HForInCacheArray* index_cache() { |
| return index_cache_; |
| } |
| |
| void set_index_cache(HForInCacheArray* index_cache) { |
| index_cache_ = index_cache; |
| } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HType CalculateInferredType() V8_OVERRIDE { |
| return HType::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(ForInCacheArray); |
| |
| private: |
| HForInCacheArray(HValue* enumerable, |
| HValue* keys, |
| int idx) : idx_(idx) { |
| SetOperandAt(0, enumerable); |
| SetOperandAt(1, keys); |
| set_representation(Representation::Tagged()); |
| } |
| |
| int idx_; |
| HForInCacheArray* index_cache_; |
| }; |
| |
| |
| class HLoadFieldByIndex V8_FINAL : public HTemplateInstruction<2> { |
| public: |
| HLoadFieldByIndex(HValue* object, |
| HValue* index) { |
| SetOperandAt(0, object); |
| SetOperandAt(1, index); |
| set_representation(Representation::Tagged()); |
| } |
| |
| virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE { |
| return Representation::Tagged(); |
| } |
| |
| HValue* object() { return OperandAt(0); } |
| HValue* index() { return OperandAt(1); } |
| |
| virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
| |
| virtual HType CalculateInferredType() V8_OVERRIDE { |
| return HType::Tagged(); |
| } |
| |
| DECLARE_CONCRETE_INSTRUCTION(LoadFieldByIndex); |
| |
| private: |
| virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
| }; |
| |
| |
| #undef DECLARE_INSTRUCTION |
| #undef DECLARE_CONCRETE_INSTRUCTION |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_INSTRUCTIONS_H_ |