| File: | var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp |
| Warning: | line 1486, column 15 Value stored to 'name' during its initialization is never read |
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| 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| 2 | * vim: set ts=8 sts=2 et sw=2 tw=80: |
| 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 6 | |
| 7 | #include "jit/MIR.h" |
| 8 | |
| 9 | #include "mozilla/EndianUtils.h" |
| 10 | #include "mozilla/FloatingPoint.h" |
| 11 | #include "mozilla/MathAlgorithms.h" |
| 12 | #include "mozilla/Maybe.h" |
| 13 | #include "mozilla/ScopeExit.h" |
| 14 | |
| 15 | #include <array> |
| 16 | #include <utility> |
| 17 | |
| 18 | #include "jslibmath.h" |
| 19 | #include "jsmath.h" |
| 20 | #include "jsnum.h" |
| 21 | |
| 22 | #include "builtin/RegExp.h" |
| 23 | #include "jit/AtomicOperations.h" |
| 24 | #include "jit/CompileInfo.h" |
| 25 | #include "jit/KnownClass.h" |
| 26 | #include "jit/MIR-wasm.h" |
| 27 | #include "jit/MIRGraph.h" |
| 28 | #include "jit/RangeAnalysis.h" |
| 29 | #include "jit/VMFunctions.h" |
| 30 | #include "jit/WarpBuilderShared.h" |
| 31 | #include "js/Conversions.h" |
| 32 | #include "js/experimental/JitInfo.h" // JSJitInfo, JSTypedMethodJitInfo |
| 33 | #include "js/ScalarType.h" // js::Scalar::Type |
| 34 | #include "util/Text.h" |
| 35 | #include "util/Unicode.h" |
| 36 | #include "vm/BigIntType.h" |
| 37 | #include "vm/Float16.h" |
| 38 | #include "vm/Iteration.h" // js::NativeIterator |
| 39 | #include "vm/PlainObject.h" // js::PlainObject |
| 40 | #include "vm/Uint8Clamped.h" |
| 41 | |
| 42 | #include "vm/BytecodeUtil-inl.h" |
| 43 | #include "vm/JSAtomUtils-inl.h" // TypeName |
| 44 | |
| 45 | using namespace js; |
| 46 | using namespace js::jit; |
| 47 | |
| 48 | using JS::ToInt32; |
| 49 | |
| 50 | using mozilla::IsFloat32Representable; |
| 51 | using mozilla::IsPowerOfTwo; |
| 52 | using mozilla::NumbersAreIdentical; |
| 53 | |
| 54 | NON_GC_POINTER_TYPE_ASSERTIONS_GENERATEDstatic_assert(!std::is_base_of_v<gc::Cell, BuiltinObjectKind >, "Ensure that BuiltinObjectKind is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, FunctionFlags >, "Ensure that FunctionFlags is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, FunctionFlags ::FunctionKind>, "Ensure that FunctionFlags::FunctionKind is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, MemoryBarrierRequirement >, "Ensure that MemoryBarrierRequirement is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, PropertyKey> , "Ensure that PropertyKey is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, RealmFuses::FuseIndex >, "Ensure that RealmFuses::FuseIndex is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, SimdShuffle> , "Ensure that SimdShuffle is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, bool>, "Ensure that bool is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, const void> , "Ensure that const void is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, gc::Heap>, "Ensure that gc::Heap is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, int32_t>, "Ensure that int32_t is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, jsid>, "Ensure that jsid is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, size_t>, "Ensure that size_t is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, uint16_t>, "Ensure that uint16_t is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, uint32_t>, "Ensure that uint32_t is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, uint8_t>, "Ensure that uint8_t is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, unsigned>, "Ensure that unsigned is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, wasm::BytecodeOffset >, "Ensure that wasm::BytecodeOffset is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, wasm::FieldWideningOp >, "Ensure that wasm::FieldWideningOp is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, wasm::SimdOp> , "Ensure that wasm::SimdOp is added to the gc_pointer_types list in GenerateMIRFiles.py." );static_assert(!std::is_base_of_v<gc::Cell, wasm::Trap> , "Ensure that wasm::Trap is added to the gc_pointer_types list in GenerateMIRFiles.py." ); |
| 55 | |
| 56 | #ifdef DEBUG1 |
| 57 | size_t MUse::index() const { return consumer()->indexOf(this); } |
| 58 | #endif |
| 59 | |
| 60 | template <size_t Op> |
| 61 | static void ConvertDefinitionToDouble(TempAllocator& alloc, MDefinition* def, |
| 62 | MInstruction* consumer) { |
| 63 | MInstruction* replace = MToDouble::New(alloc, def); |
| 64 | consumer->replaceOperand(Op, replace); |
| 65 | consumer->block()->insertBefore(consumer, replace); |
| 66 | } |
| 67 | |
| 68 | template <size_t Arity, size_t Index> |
| 69 | static void ConvertOperandToDouble(MAryInstruction<Arity>* def, |
| 70 | TempAllocator& alloc) { |
| 71 | static_assert(Index < Arity); |
| 72 | auto* operand = def->getOperand(Index); |
| 73 | if (operand->type() == MIRType::Float32) { |
| 74 | ConvertDefinitionToDouble<Index>(alloc, operand, def); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | template <size_t Arity, size_t... ISeq> |
| 79 | static void ConvertOperandsToDouble(MAryInstruction<Arity>* def, |
| 80 | TempAllocator& alloc, |
| 81 | std::index_sequence<ISeq...>) { |
| 82 | (ConvertOperandToDouble<Arity, ISeq>(def, alloc), ...); |
| 83 | } |
| 84 | |
| 85 | template <size_t Arity> |
| 86 | static void ConvertOperandsToDouble(MAryInstruction<Arity>* def, |
| 87 | TempAllocator& alloc) { |
| 88 | ConvertOperandsToDouble<Arity>(def, alloc, std::make_index_sequence<Arity>{}); |
| 89 | } |
| 90 | |
| 91 | template <size_t Arity, size_t... ISeq> |
| 92 | static bool AllOperandsCanProduceFloat32(MAryInstruction<Arity>* def, |
| 93 | std::index_sequence<ISeq...>) { |
| 94 | return (def->getOperand(ISeq)->canProduceFloat32() && ...); |
| 95 | } |
| 96 | |
| 97 | template <size_t Arity> |
| 98 | static bool AllOperandsCanProduceFloat32(MAryInstruction<Arity>* def) { |
| 99 | return AllOperandsCanProduceFloat32<Arity>(def, |
| 100 | std::make_index_sequence<Arity>{}); |
| 101 | } |
| 102 | |
| 103 | static bool CheckUsesAreFloat32Consumers(const MInstruction* ins) { |
| 104 | if (ins->isImplicitlyUsed()) { |
| 105 | return false; |
| 106 | } |
| 107 | bool allConsumerUses = true; |
| 108 | for (MUseDefIterator use(ins); allConsumerUses && use; use++) { |
| 109 | allConsumerUses &= use.def()->canConsumeFloat32(use.use()); |
| 110 | } |
| 111 | return allConsumerUses; |
| 112 | } |
| 113 | |
| 114 | #ifdef JS_JITSPEW1 |
| 115 | static const char* OpcodeName(MDefinition::Opcode op) { |
| 116 | static const char* const names[] = { |
| 117 | # define NAME(x) #x, |
| 118 | MIR_OPCODE_LIST(NAME)NAME(Start)NAME(OsrEntry)NAME(Nop)NAME(LimitedTruncate)NAME(Constant )NAME(WasmNullConstant)NAME(WasmFloatConstant)NAME(Parameter) NAME(Callee)NAME(IsConstructing)NAME(TableSwitch)NAME(Goto)NAME (Test)NAME(Return)NAME(Throw)NAME(ThrowWithStack)NAME(NewArray )NAME(NewArrayDynamicLength)NAME(NewTypedArray)NAME(NewTypedArrayDynamicLength )NAME(NewTypedArrayFromArray)NAME(NewTypedArrayFromArrayBuffer )NAME(NewObject)NAME(NewPlainObject)NAME(NewArrayObject)NAME( NewIterator)NAME(ObjectState)NAME(ArrayState)NAME(BindFunction )NAME(NewBoundFunction)NAME(BoundFunctionNumArgs)NAME(GuardBoundFunctionIsConstructor )NAME(MutateProto)NAME(InitPropGetterSetter)NAME(InitElemGetterSetter )NAME(Call)NAME(CallClassHook)NAME(ApplyArgs)NAME(ApplyArgsObj )NAME(ApplyArray)NAME(ConstructArgs)NAME(ConstructArray)NAME( Bail)NAME(Unreachable)NAME(EncodeSnapshot)NAME(AssertRecoveredOnBailout )NAME(AssertFloat32)NAME(Compare)NAME(SameValueDouble)NAME(SameValue )NAME(Box)NAME(Unbox)NAME(AssertRange)NAME(AssertClass)NAME(AssertShape )NAME(CreateThis)NAME(CreateArgumentsObject)NAME(CreateInlinedArgumentsObject )NAME(GetInlinedArgument)NAME(GetInlinedArgumentHole)NAME(GetArgumentsObjectArg )NAME(SetArgumentsObjectArg)NAME(LoadArgumentsObjectArg)NAME( LoadArgumentsObjectArgHole)NAME(InArgumentsObjectArg)NAME(ArgumentsObjectLength )NAME(ArrayFromArgumentsObject)NAME(GuardArgumentsObjectFlags )NAME(LoadScriptedProxyHandler)NAME(CheckScriptedProxyGetResult )NAME(IdToStringOrSymbol)NAME(ReturnFromCtor)NAME(ToDouble)NAME (ToFloat32)NAME(ToFloat16)NAME(WasmUnsignedToDouble)NAME(WasmUnsignedToFloat32 )NAME(WrapInt64ToInt32)NAME(ExtendInt32ToInt64)NAME(WasmBuiltinTruncateToInt64 )NAME(WasmTruncateToInt64)NAME(WasmTruncateToInt32)NAME(WasmAnyRefFromJSValue )NAME(WasmAnyRefFromJSObject)NAME(WasmAnyRefFromJSString)NAME (WasmAnyRefIsJSString)NAME(WasmTrapIfAnyRefIsNotJSString)NAME (WasmNewI31Ref)NAME(WasmI31RefGet)NAME(Int32ToIntPtr)NAME(NonNegativeIntPtrToInt32 )NAME(IntPtrToDouble)NAME(AdjustDataViewLength)NAME(Int64ToFloatingPoint )NAME(BuiltinInt64ToFloatingPoint)NAME(ToNumberInt32)NAME(BooleanToInt32 )NAME(TruncateToInt32)NAME(WasmBuiltinTruncateToInt32)NAME(ToBigInt )NAME(ToInt64)NAME(TruncateBigIntToInt64)NAME(Int32ToBigInt)NAME (Int64ToBigInt)NAME(Int64ToIntPtr)NAME(IntPtrToInt64)NAME(ToString )NAME(BitNot)NAME(TypeOf)NAME(TypeOfName)NAME(TypeOfIs)NAME(ToAsyncIter )NAME(ToPropertyKeyCache)NAME(BitAnd)NAME(BitOr)NAME(BitXor)NAME (Lsh)NAME(Rsh)NAME(Ursh)NAME(SignExtendInt32)NAME(SignExtendInt64 )NAME(MinMax)NAME(MinMaxArray)NAME(Abs)NAME(Clz)NAME(Ctz)NAME (Popcnt)NAME(Sqrt)NAME(CopySign)NAME(Atan2)NAME(Hypot)NAME(Pow )NAME(PowHalf)NAME(Random)NAME(Sign)NAME(MathFunction)NAME(Add )NAME(Sub)NAME(Mul)NAME(Div)NAME(WasmBuiltinDivI64)NAME(Mod)NAME (WasmBuiltinModD)NAME(WasmBuiltinModI64)NAME(BigIntAdd)NAME(BigIntSub )NAME(BigIntMul)NAME(BigIntDiv)NAME(BigIntMod)NAME(BigIntPow) NAME(BigIntBitAnd)NAME(BigIntBitOr)NAME(BigIntBitXor)NAME(BigIntLsh )NAME(BigIntRsh)NAME(BigIntIncrement)NAME(BigIntDecrement)NAME (BigIntNegate)NAME(BigIntBitNot)NAME(BigIntToIntPtr)NAME(IntPtrToBigInt )NAME(BigIntPtrAdd)NAME(BigIntPtrSub)NAME(BigIntPtrMul)NAME(BigIntPtrDiv )NAME(BigIntPtrMod)NAME(BigIntPtrPow)NAME(BigIntPtrBitAnd)NAME (BigIntPtrBitOr)NAME(BigIntPtrBitXor)NAME(BigIntPtrLsh)NAME(BigIntPtrRsh )NAME(BigIntPtrBitNot)NAME(Int32ToStringWithBase)NAME(NumberParseInt )NAME(DoubleParseInt)NAME(Concat)NAME(LinearizeString)NAME(LinearizeForCharAccess )NAME(LinearizeForCodePointAccess)NAME(ToRelativeStringIndex) NAME(CharCodeAt)NAME(CharCodeAtOrNegative)NAME(CodePointAt)NAME (CodePointAtOrNegative)NAME(NegativeToNaN)NAME(NegativeToUndefined )NAME(FromCharCode)NAME(FromCharCodeEmptyIfNegative)NAME(FromCharCodeUndefinedIfNegative )NAME(FromCodePoint)NAME(StringIncludes)NAME(StringIndexOf)NAME (StringLastIndexOf)NAME(StringStartsWith)NAME(StringEndsWith) NAME(StringConvertCase)NAME(CharCodeConvertCase)NAME(StringTrimStartIndex )NAME(StringTrimEndIndex)NAME(StringSplit)NAME(BoxNonStrictThis )NAME(ImplicitThis)NAME(Phi)NAME(Beta)NAME(NaNToZero)NAME(OsrValue )NAME(OsrEnvironmentChain)NAME(OsrArgumentsObject)NAME(OsrReturnValue )NAME(BinaryCache)NAME(UnaryCache)NAME(CheckOverRecursed)NAME (InterruptCheck)NAME(WasmInterruptCheck)NAME(WasmTrap)NAME(WasmTrapIfNull )NAME(LexicalCheck)NAME(ThrowRuntimeLexicalError)NAME(ThrowMsg )NAME(GlobalDeclInstantiation)NAME(RegExp)NAME(RegExpMatcher) NAME(RegExpSearcher)NAME(RegExpSearcherLastLimit)NAME(RegExpExecMatch )NAME(RegExpExecTest)NAME(RegExpHasCaptureGroups)NAME(RegExpPrototypeOptimizable )NAME(RegExpInstanceOptimizable)NAME(GetFirstDollarIndex)NAME (StringReplace)NAME(Substr)NAME(ModuleMetadata)NAME(DynamicImport )NAME(Lambda)NAME(FunctionWithProto)NAME(SetFunName)NAME(Slots )NAME(Elements)NAME(InitializedLength)NAME(SetInitializedLength )NAME(ArrayLength)NAME(SetArrayLength)NAME(FunctionLength)NAME (FunctionName)NAME(GetNextEntryForIterator)NAME(ArrayBufferByteLength )NAME(ArrayBufferViewLength)NAME(ArrayBufferViewByteOffset)NAME (ArrayBufferViewElements)NAME(ResizableTypedArrayByteOffsetMaybeOutOfBounds )NAME(ResizableTypedArrayLength)NAME(ResizableDataViewByteLength )NAME(GrowableSharedArrayBufferByteLength)NAME(TypedArrayElementSize )NAME(GuardHasAttachedArrayBuffer)NAME(GuardResizableArrayBufferViewInBounds )NAME(GuardResizableArrayBufferViewInBoundsOrDetached)NAME(GuardNumberToIntPtrIndex )NAME(KeepAliveObject)NAME(DebugEnterGCUnsafeRegion)NAME(DebugLeaveGCUnsafeRegion )NAME(Not)NAME(BoundsCheck)NAME(BoundsCheckLower)NAME(SpectreMaskIndex )NAME(LoadElement)NAME(LoadElementAndUnbox)NAME(LoadElementHole )NAME(StoreElement)NAME(StoreHoleValueElement)NAME(StoreElementHole )NAME(ArrayPopShift)NAME(ArrayPush)NAME(ArraySlice)NAME(ArgumentsSlice )NAME(FrameArgumentsSlice)NAME(InlineArgumentsSlice)NAME(NormalizeSliceTerm )NAME(ArrayJoin)NAME(ObjectKeys)NAME(ObjectKeysLength)NAME(LoadUnboxedScalar )NAME(LoadDataViewElement)NAME(LoadTypedArrayElementHole)NAME (StoreUnboxedScalar)NAME(StoreDataViewElement)NAME(StoreTypedArrayElementHole )NAME(EffectiveAddress)NAME(ClampToUint8)NAME(LoadFixedSlot)NAME (LoadFixedSlotAndUnbox)NAME(LoadDynamicSlotAndUnbox)NAME(StoreFixedSlot )NAME(GetPropertyCache)NAME(HomeObjectSuperBase)NAME(GetPropSuperCache )NAME(BindNameCache)NAME(CallBindVar)NAME(GuardShape)NAME(GuardFuse )NAME(GuardMultipleShapes)NAME(GuardProto)NAME(GuardNullProto )NAME(GuardIsNativeObject)NAME(GuardGlobalGeneration)NAME(GuardIsProxy )NAME(GuardIsNotDOMProxy)NAME(GuardIsNotProxy)NAME(ProxyGet)NAME (ProxyGetByValue)NAME(ProxyHasProp)NAME(ProxySet)NAME(ProxySetByValue )NAME(CallSetArrayLength)NAME(MegamorphicLoadSlot)NAME(MegamorphicLoadSlotPermissive )NAME(MegamorphicLoadSlotByValue)NAME(MegamorphicLoadSlotByValuePermissive )NAME(MegamorphicStoreSlot)NAME(MegamorphicHasProp)NAME(SmallObjectVariableKeyHasProp )NAME(GuardIsNotArrayBufferMaybeShared)NAME(GuardIsTypedArray )NAME(GuardIsFixedLengthTypedArray)NAME(GuardIsResizableTypedArray )NAME(GuardHasProxyHandler)NAME(NurseryObject)NAME(GuardValue )NAME(GuardNullOrUndefined)NAME(GuardIsNotObject)NAME(GuardFunctionFlags )NAME(GuardFunctionIsNonBuiltinCtor)NAME(GuardFunctionKind)NAME (GuardFunctionScript)NAME(GuardObjectIdentity)NAME(GuardSpecificFunction )NAME(GuardSpecificAtom)NAME(GuardSpecificSymbol)NAME(GuardSpecificInt32 )NAME(GuardStringToIndex)NAME(GuardStringToInt32)NAME(GuardStringToDouble )NAME(GuardNoDenseElements)NAME(GuardTagNotEqual)NAME(LoadDynamicSlot )NAME(FunctionEnvironment)NAME(NewLexicalEnvironmentObject)NAME (NewClassBodyEnvironmentObject)NAME(NewVarEnvironmentObject)NAME (HomeObject)NAME(AddAndStoreSlot)NAME(AllocateAndStoreSlot)NAME (AddSlotAndCallAddPropHook)NAME(StoreDynamicSlot)NAME(GetNameCache )NAME(CallGetIntrinsicValue)NAME(DeleteProperty)NAME(DeleteElement )NAME(SetPropertyCache)NAME(MegamorphicSetElement)NAME(SetDOMProperty )NAME(GetDOMProperty)NAME(GetDOMMember)NAME(ObjectToIterator) NAME(ValueToIterator)NAME(IteratorHasIndices)NAME(LoadSlotByIteratorIndex )NAME(StoreSlotByIteratorIndex)NAME(LoadDOMExpandoValue)NAME( LoadDOMExpandoValueGuardGeneration)NAME(LoadDOMExpandoValueIgnoreGeneration )NAME(GuardDOMExpandoMissingOrGuardShape)NAME(StringLength)NAME (Floor)NAME(Ceil)NAME(Round)NAME(Trunc)NAME(NearbyInt)NAME(GetIteratorCache )NAME(OptimizeSpreadCallCache)NAME(IteratorMore)NAME(IsNoIter )NAME(IteratorEnd)NAME(CloseIterCache)NAME(OptimizeGetIteratorCache )NAME(InCache)NAME(InArray)NAME(GuardElementNotHole)NAME(NewPrivateName )NAME(CheckPrivateFieldCache)NAME(HasOwnCache)NAME(InstanceOf )NAME(InstanceOfCache)NAME(ArgumentsLength)NAME(GetFrameArgument )NAME(GetFrameArgumentHole)NAME(NewTarget)NAME(Rest)NAME(PostWriteBarrier )NAME(PostWriteElementBarrier)NAME(AssertCanElidePostWriteBarrier )NAME(NewNamedLambdaObject)NAME(NewCallObject)NAME(NewStringObject )NAME(IsCallable)NAME(IsConstructor)NAME(IsCrossRealmArrayConstructor )NAME(IsObject)NAME(IsNullOrUndefined)NAME(HasClass)NAME(GuardToClass )NAME(GuardToEitherClass)NAME(GuardToFunction)NAME(IsArray)NAME (IsTypedArray)NAME(ObjectClassToString)NAME(CheckReturn)NAME( CheckThis)NAME(AsyncResolve)NAME(AsyncReject)NAME(GeneratorReturn )NAME(AsyncAwait)NAME(CheckThisReinit)NAME(Generator)NAME(CanSkipAwait )NAME(MaybeExtractAwaitValue)NAME(IncrementWarmUpCounter)NAME (AtomicIsLockFree)NAME(CompareExchangeTypedArrayElement)NAME( AtomicExchangeTypedArrayElement)NAME(AtomicTypedArrayElementBinop )NAME(Debugger)NAME(CheckIsObj)NAME(CheckObjCoercible)NAME(CheckClassHeritage )NAME(DebugCheckSelfHosted)NAME(IsPackedArray)NAME(GuardArrayIsPacked )NAME(GetPrototypeOf)NAME(ObjectWithProto)NAME(ObjectStaticProto )NAME(ConstantProto)NAME(BuiltinObject)NAME(SuperFunction)NAME (InitHomeObject)NAME(IsTypedArrayConstructor)NAME(LoadValueTag )NAME(LoadWrapperTarget)NAME(GuardHasGetterSetter)NAME(GuardIsExtensible )NAME(GuardInt32IsNonNegative)NAME(GuardInt32Range)NAME(GuardIndexIsNotDenseElement )NAME(GuardIndexIsValidUpdateOrAdd)NAME(CallAddOrUpdateSparseElement )NAME(CallGetSparseElement)NAME(CallNativeGetElement)NAME(CallNativeGetElementSuper )NAME(CallObjectHasSparseElement)NAME(BigIntAsIntN)NAME(BigIntAsUintN )NAME(GuardNonGCThing)NAME(ToHashableNonGCThing)NAME(ToHashableString )NAME(ToHashableValue)NAME(HashNonGCThing)NAME(HashString)NAME (HashSymbol)NAME(HashBigInt)NAME(HashObject)NAME(HashValue)NAME (SetObjectHasNonBigInt)NAME(SetObjectHasBigInt)NAME(SetObjectHasValue )NAME(SetObjectHasValueVMCall)NAME(SetObjectSize)NAME(MapObjectHasNonBigInt )NAME(MapObjectHasBigInt)NAME(MapObjectHasValue)NAME(MapObjectHasValueVMCall )NAME(MapObjectGetNonBigInt)NAME(MapObjectGetBigInt)NAME(MapObjectGetValue )NAME(MapObjectGetValueVMCall)NAME(MapObjectSize)NAME(PostIntPtrConversion )NAME(WasmNeg)NAME(WasmBinaryBitwise)NAME(WasmLoadInstance)NAME (WasmStoreInstance)NAME(WasmHeapReg)NAME(WasmBoundsCheck)NAME (WasmBoundsCheckRange32)NAME(WasmExtendU32Index)NAME(WasmWrapU32Index )NAME(WasmClampTable64Index)NAME(WasmAddOffset)NAME(WasmAlignmentCheck )NAME(WasmLoad)NAME(WasmStore)NAME(AsmJSLoadHeap)NAME(AsmJSStoreHeap )NAME(WasmFence)NAME(WasmCompareExchangeHeap)NAME(WasmAtomicExchangeHeap )NAME(WasmAtomicBinopHeap)NAME(WasmLoadInstanceDataField)NAME (WasmLoadGlobalCell)NAME(WasmLoadTableElement)NAME(WasmStoreInstanceDataField )NAME(WasmStoreGlobalCell)NAME(WasmStoreStackResult)NAME(WasmDerivedPointer )NAME(WasmDerivedIndexPointer)NAME(WasmStoreRef)NAME(WasmPostWriteBarrierImmediate )NAME(WasmPostWriteBarrierIndex)NAME(WasmParameter)NAME(WasmReturn )NAME(WasmReturnVoid)NAME(WasmStackArg)NAME(WasmRegisterResult )NAME(WasmFloatRegisterResult)NAME(WasmRegister64Result)NAME( WasmStackResultArea)NAME(WasmStackResult)NAME(WasmCallCatchable )NAME(WasmCallUncatchable)NAME(WasmCallLandingPrePad)NAME(WasmReturnCall )NAME(WasmSelect)NAME(WasmReinterpret)NAME(Rotate)NAME(WasmStackSwitchToMain )NAME(WasmStackSwitchToSuspendable)NAME(WasmStackContinueOnSuspendable )NAME(WasmBinarySimd128)NAME(WasmBinarySimd128WithConstant)NAME (WasmShiftSimd128)NAME(WasmShuffleSimd128)NAME(WasmReplaceLaneSimd128 )NAME(WasmUnarySimd128)NAME(WasmTernarySimd128)NAME(WasmScalarToSimd128 )NAME(WasmReduceSimd128)NAME(WasmLoadLaneSimd128)NAME(WasmStoreLaneSimd128 )NAME(UnreachableResult)NAME(IonToWasmCall)NAME(WasmLoadField )NAME(WasmLoadFieldKA)NAME(WasmLoadElementKA)NAME(WasmStoreFieldKA )NAME(WasmStoreFieldRefKA)NAME(WasmStoreElementKA)NAME(WasmStoreElementRefKA )NAME(WasmRefIsSubtypeOfConcrete)NAME(WasmRefIsSubtypeOfAbstract )NAME(WasmNewStructObject)NAME(WasmNewArrayObject) |
| 119 | # undef NAME |
| 120 | }; |
| 121 | return names[unsigned(op)]; |
| 122 | } |
| 123 | |
| 124 | void MDefinition::PrintOpcodeName(GenericPrinter& out, Opcode op) { |
| 125 | const char* name = OpcodeName(op); |
| 126 | size_t len = strlen(name); |
| 127 | for (size_t i = 0; i < len; i++) { |
| 128 | out.printf("%c", unicode::ToLowerCase(name[i])); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | uint32_t js::jit::GetMBasicBlockId(const MBasicBlock* block) { |
| 133 | return block->id(); |
| 134 | } |
| 135 | #endif |
| 136 | |
| 137 | static MConstant* EvaluateInt64ConstantOperands(TempAllocator& alloc, |
| 138 | MBinaryInstruction* ins) { |
| 139 | MDefinition* left = ins->getOperand(0); |
| 140 | MDefinition* right = ins->getOperand(1); |
| 141 | |
| 142 | if (!left->isConstant() || !right->isConstant()) { |
| 143 | return nullptr; |
| 144 | } |
| 145 | |
| 146 | MOZ_ASSERT(left->type() == MIRType::Int64)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::Int64)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: Int64))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::Int64", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::Int64" ")"); do { *((volatile int*)__null) = 146; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 147 | MOZ_ASSERT(right->type() == MIRType::Int64)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::Int64)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: Int64))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::Int64", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 147); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::Int64" ")"); do { *((volatile int*)__null) = 147; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 148 | |
| 149 | int64_t lhs = left->toConstant()->toInt64(); |
| 150 | int64_t rhs = right->toConstant()->toInt64(); |
| 151 | int64_t ret; |
| 152 | |
| 153 | switch (ins->op()) { |
| 154 | case MDefinition::Opcode::BitAnd: |
| 155 | ret = lhs & rhs; |
| 156 | break; |
| 157 | case MDefinition::Opcode::BitOr: |
| 158 | ret = lhs | rhs; |
| 159 | break; |
| 160 | case MDefinition::Opcode::BitXor: |
| 161 | ret = lhs ^ rhs; |
| 162 | break; |
| 163 | case MDefinition::Opcode::Lsh: |
| 164 | ret = lhs << (rhs & 0x3F); |
| 165 | break; |
| 166 | case MDefinition::Opcode::Rsh: |
| 167 | ret = lhs >> (rhs & 0x3F); |
| 168 | break; |
| 169 | case MDefinition::Opcode::Ursh: |
| 170 | ret = uint64_t(lhs) >> (uint64_t(rhs) & 0x3F); |
| 171 | break; |
| 172 | case MDefinition::Opcode::Add: |
| 173 | ret = lhs + rhs; |
| 174 | break; |
| 175 | case MDefinition::Opcode::Sub: |
| 176 | ret = lhs - rhs; |
| 177 | break; |
| 178 | case MDefinition::Opcode::Mul: |
| 179 | ret = lhs * rhs; |
| 180 | break; |
| 181 | case MDefinition::Opcode::Div: |
| 182 | if (rhs == 0) { |
| 183 | // Division by zero will trap at runtime. |
| 184 | return nullptr; |
| 185 | } |
| 186 | if (ins->toDiv()->isUnsigned()) { |
| 187 | ret = int64_t(uint64_t(lhs) / uint64_t(rhs)); |
| 188 | } else if (lhs == INT64_MIN(-9223372036854775807L -1) || rhs == -1) { |
| 189 | // Overflow will trap at runtime. |
| 190 | return nullptr; |
| 191 | } else { |
| 192 | ret = lhs / rhs; |
| 193 | } |
| 194 | break; |
| 195 | case MDefinition::Opcode::Mod: |
| 196 | if (rhs == 0) { |
| 197 | // Division by zero will trap at runtime. |
| 198 | return nullptr; |
| 199 | } |
| 200 | if (!ins->toMod()->isUnsigned() && (lhs < 0 || rhs < 0)) { |
| 201 | // Handle all negative values at runtime, for simplicity. |
| 202 | return nullptr; |
| 203 | } |
| 204 | ret = int64_t(uint64_t(lhs) % uint64_t(rhs)); |
| 205 | break; |
| 206 | default: |
| 207 | MOZ_CRASH("NYI")do { do { } while (false); MOZ_ReportCrash("" "NYI", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 207); AnnotateMozCrashReason("MOZ_CRASH(" "NYI" ")"); do { * ((volatile int*)__null) = 207; __attribute__((nomerge)) ::abort (); } while (false); } while (false); |
| 208 | } |
| 209 | |
| 210 | return MConstant::NewInt64(alloc, ret); |
| 211 | } |
| 212 | |
| 213 | static MConstant* EvaluateConstantOperands(TempAllocator& alloc, |
| 214 | MBinaryInstruction* ins, |
| 215 | bool* ptypeChange = nullptr) { |
| 216 | MDefinition* left = ins->getOperand(0); |
| 217 | MDefinition* right = ins->getOperand(1); |
| 218 | |
| 219 | MOZ_ASSERT(IsTypeRepresentableAsDouble(left->type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsTypeRepresentableAsDouble(left->type()))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(IsTypeRepresentableAsDouble(left->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsTypeRepresentableAsDouble(left->type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 219); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTypeRepresentableAsDouble(left->type())" ")"); do { *((volatile int*)__null) = 219; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 220 | MOZ_ASSERT(IsTypeRepresentableAsDouble(right->type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsTypeRepresentableAsDouble(right->type()))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsTypeRepresentableAsDouble(right->type())))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("IsTypeRepresentableAsDouble(right->type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 220); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTypeRepresentableAsDouble(right->type())" ")"); do { *((volatile int*)__null) = 220; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 221 | |
| 222 | if (!left->isConstant() || !right->isConstant()) { |
| 223 | return nullptr; |
| 224 | } |
| 225 | |
| 226 | MConstant* lhs = left->toConstant(); |
| 227 | MConstant* rhs = right->toConstant(); |
| 228 | double ret = JS::GenericNaN(); |
| 229 | |
| 230 | switch (ins->op()) { |
| 231 | case MDefinition::Opcode::BitAnd: |
| 232 | ret = double(lhs->toInt32() & rhs->toInt32()); |
| 233 | break; |
| 234 | case MDefinition::Opcode::BitOr: |
| 235 | ret = double(lhs->toInt32() | rhs->toInt32()); |
| 236 | break; |
| 237 | case MDefinition::Opcode::BitXor: |
| 238 | ret = double(lhs->toInt32() ^ rhs->toInt32()); |
| 239 | break; |
| 240 | case MDefinition::Opcode::Lsh: |
| 241 | ret = double(uint32_t(lhs->toInt32()) << (rhs->toInt32() & 0x1F)); |
| 242 | break; |
| 243 | case MDefinition::Opcode::Rsh: |
| 244 | ret = double(lhs->toInt32() >> (rhs->toInt32() & 0x1F)); |
| 245 | break; |
| 246 | case MDefinition::Opcode::Ursh: |
| 247 | ret = double(uint32_t(lhs->toInt32()) >> (rhs->toInt32() & 0x1F)); |
| 248 | break; |
| 249 | case MDefinition::Opcode::Add: |
| 250 | ret = lhs->numberToDouble() + rhs->numberToDouble(); |
| 251 | break; |
| 252 | case MDefinition::Opcode::Sub: |
| 253 | ret = lhs->numberToDouble() - rhs->numberToDouble(); |
| 254 | break; |
| 255 | case MDefinition::Opcode::Mul: |
| 256 | ret = lhs->numberToDouble() * rhs->numberToDouble(); |
| 257 | break; |
| 258 | case MDefinition::Opcode::Div: |
| 259 | if (ins->toDiv()->isUnsigned()) { |
| 260 | if (rhs->isInt32(0)) { |
| 261 | if (ins->toDiv()->trapOnError()) { |
| 262 | return nullptr; |
| 263 | } |
| 264 | ret = 0.0; |
| 265 | } else { |
| 266 | ret = double(uint32_t(lhs->toInt32()) / uint32_t(rhs->toInt32())); |
| 267 | } |
| 268 | } else { |
| 269 | ret = NumberDiv(lhs->numberToDouble(), rhs->numberToDouble()); |
| 270 | } |
| 271 | break; |
| 272 | case MDefinition::Opcode::Mod: |
| 273 | if (ins->toMod()->isUnsigned()) { |
| 274 | if (rhs->isInt32(0)) { |
| 275 | if (ins->toMod()->trapOnError()) { |
| 276 | return nullptr; |
| 277 | } |
| 278 | ret = 0.0; |
| 279 | } else { |
| 280 | ret = double(uint32_t(lhs->toInt32()) % uint32_t(rhs->toInt32())); |
| 281 | } |
| 282 | } else { |
| 283 | ret = NumberMod(lhs->numberToDouble(), rhs->numberToDouble()); |
| 284 | } |
| 285 | break; |
| 286 | default: |
| 287 | MOZ_CRASH("NYI")do { do { } while (false); MOZ_ReportCrash("" "NYI", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 287); AnnotateMozCrashReason("MOZ_CRASH(" "NYI" ")"); do { * ((volatile int*)__null) = 287; __attribute__((nomerge)) ::abort (); } while (false); } while (false); |
| 288 | } |
| 289 | |
| 290 | if (ins->type() == MIRType::Float32) { |
| 291 | return MConstant::NewFloat32(alloc, float(ret)); |
| 292 | } |
| 293 | if (ins->type() == MIRType::Double) { |
| 294 | return MConstant::New(alloc, DoubleValue(ret)); |
| 295 | } |
| 296 | |
| 297 | Value retVal; |
| 298 | retVal.setNumber(JS::CanonicalizeNaN(ret)); |
| 299 | |
| 300 | // If this was an int32 operation but the result isn't an int32 (for |
| 301 | // example, a division where the numerator isn't evenly divisible by the |
| 302 | // denominator), decline folding. |
| 303 | MOZ_ASSERT(ins->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::Int32 ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 303); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 303; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 304 | if (!retVal.isInt32()) { |
| 305 | if (ptypeChange) { |
| 306 | *ptypeChange = true; |
| 307 | } |
| 308 | return nullptr; |
| 309 | } |
| 310 | |
| 311 | return MConstant::New(alloc, retVal); |
| 312 | } |
| 313 | |
| 314 | static MConstant* EvaluateConstantNaNOperand(MBinaryInstruction* ins) { |
| 315 | auto* left = ins->lhs(); |
| 316 | auto* right = ins->rhs(); |
| 317 | |
| 318 | MOZ_ASSERT(IsTypeRepresentableAsDouble(left->type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsTypeRepresentableAsDouble(left->type()))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(IsTypeRepresentableAsDouble(left->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsTypeRepresentableAsDouble(left->type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 318); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTypeRepresentableAsDouble(left->type())" ")"); do { *((volatile int*)__null) = 318; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 319 | MOZ_ASSERT(IsTypeRepresentableAsDouble(right->type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsTypeRepresentableAsDouble(right->type()))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsTypeRepresentableAsDouble(right->type())))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("IsTypeRepresentableAsDouble(right->type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 319); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTypeRepresentableAsDouble(right->type())" ")"); do { *((volatile int*)__null) = 319; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 320 | MOZ_ASSERT(left->type() == ins->type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == ins->type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == ins->type ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == ins->type()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 320); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == ins->type()" ")"); do { *((volatile int*)__null) = 320; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 321 | MOZ_ASSERT(right->type() == ins->type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == ins->type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == ins-> type()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == ins->type()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 321); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == ins->type()" ")"); do { *((volatile int*)__null) = 321; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 322 | |
| 323 | // Don't fold NaN if we can't return a floating point type. |
| 324 | if (!IsFloatingPointType(ins->type())) { |
| 325 | return nullptr; |
| 326 | } |
| 327 | |
| 328 | MOZ_ASSERT(!left->isConstant() || !right->isConstant(),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!left->isConstant() || !right->isConstant())> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!left->isConstant() || !right->isConstant()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!left->isConstant() || !right->isConstant()" " (" "EvaluateConstantOperands should have handled this case" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 329); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!left->isConstant() || !right->isConstant()" ") (" "EvaluateConstantOperands should have handled this case" ")"); do { *((volatile int*)__null) = 329; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 329 | "EvaluateConstantOperands should have handled this case")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!left->isConstant() || !right->isConstant())> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!left->isConstant() || !right->isConstant()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!left->isConstant() || !right->isConstant()" " (" "EvaluateConstantOperands should have handled this case" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 329); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!left->isConstant() || !right->isConstant()" ") (" "EvaluateConstantOperands should have handled this case" ")"); do { *((volatile int*)__null) = 329; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 330 | |
| 331 | // One operand must be a constant NaN. |
| 332 | MConstant* cst; |
| 333 | if (left->isConstant()) { |
| 334 | cst = left->toConstant(); |
| 335 | } else if (right->isConstant()) { |
| 336 | cst = right->toConstant(); |
| 337 | } else { |
| 338 | return nullptr; |
| 339 | } |
| 340 | if (!std::isnan(cst->numberToDouble())) { |
| 341 | return nullptr; |
| 342 | } |
| 343 | |
| 344 | // Fold to constant NaN. |
| 345 | return cst; |
| 346 | } |
| 347 | |
| 348 | static MMul* EvaluateExactReciprocal(TempAllocator& alloc, MDiv* ins) { |
| 349 | // we should fold only when it is a floating point operation |
| 350 | if (!IsFloatingPointType(ins->type())) { |
| 351 | return nullptr; |
| 352 | } |
| 353 | |
| 354 | MDefinition* left = ins->getOperand(0); |
| 355 | MDefinition* right = ins->getOperand(1); |
| 356 | |
| 357 | if (!right->isConstant()) { |
| 358 | return nullptr; |
| 359 | } |
| 360 | |
| 361 | int32_t num; |
| 362 | if (!mozilla::NumberIsInt32(right->toConstant()->numberToDouble(), &num)) { |
| 363 | return nullptr; |
| 364 | } |
| 365 | |
| 366 | // check if rhs is a power of two |
| 367 | if (mozilla::Abs(num) & (mozilla::Abs(num) - 1)) { |
| 368 | return nullptr; |
| 369 | } |
| 370 | |
| 371 | Value ret; |
| 372 | ret.setDouble(1.0 / double(num)); |
| 373 | |
| 374 | MConstant* foldedRhs; |
| 375 | if (ins->type() == MIRType::Float32) { |
| 376 | foldedRhs = MConstant::NewFloat32(alloc, ret.toDouble()); |
| 377 | } else { |
| 378 | foldedRhs = MConstant::New(alloc, ret); |
| 379 | } |
| 380 | |
| 381 | MOZ_ASSERT(foldedRhs->type() == ins->type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(foldedRhs->type() == ins->type())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(foldedRhs->type() == ins->type()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("foldedRhs->type() == ins->type()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 381); AnnotateMozCrashReason("MOZ_ASSERT" "(" "foldedRhs->type() == ins->type()" ")"); do { *((volatile int*)__null) = 381; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 382 | ins->block()->insertBefore(ins, foldedRhs); |
| 383 | |
| 384 | MMul* mul = MMul::New(alloc, left, foldedRhs, ins->type()); |
| 385 | mul->setMustPreserveNaN(ins->mustPreserveNaN()); |
| 386 | return mul; |
| 387 | } |
| 388 | |
| 389 | #ifdef JS_JITSPEW1 |
| 390 | const char* MDefinition::opName() const { return OpcodeName(op()); } |
| 391 | |
| 392 | void MDefinition::printName(GenericPrinter& out) const { |
| 393 | PrintOpcodeName(out, op()); |
| 394 | out.printf("%u", id()); |
| 395 | } |
| 396 | #endif |
| 397 | |
| 398 | HashNumber MDefinition::valueHash() const { |
| 399 | HashNumber out = HashNumber(op()); |
| 400 | for (size_t i = 0, e = numOperands(); i < e; i++) { |
| 401 | out = addU32ToHash(out, getOperand(i)->id()); |
| 402 | } |
| 403 | if (MDefinition* dep = dependency()) { |
| 404 | out = addU32ToHash(out, dep->id()); |
| 405 | } |
| 406 | return out; |
| 407 | } |
| 408 | |
| 409 | HashNumber MNullaryInstruction::valueHash() const { |
| 410 | HashNumber hash = HashNumber(op()); |
| 411 | if (MDefinition* dep = dependency()) { |
| 412 | hash = addU32ToHash(hash, dep->id()); |
| 413 | } |
| 414 | MOZ_ASSERT(hash == MDefinition::valueHash())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hash == MDefinition::valueHash())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hash == MDefinition::valueHash ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("hash == MDefinition::valueHash()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 414); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hash == MDefinition::valueHash()" ")"); do { *((volatile int*)__null) = 414; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 415 | return hash; |
| 416 | } |
| 417 | |
| 418 | HashNumber MUnaryInstruction::valueHash() const { |
| 419 | HashNumber hash = HashNumber(op()); |
| 420 | hash = addU32ToHash(hash, getOperand(0)->id()); |
| 421 | if (MDefinition* dep = dependency()) { |
| 422 | hash = addU32ToHash(hash, dep->id()); |
| 423 | } |
| 424 | MOZ_ASSERT(hash == MDefinition::valueHash())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hash == MDefinition::valueHash())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hash == MDefinition::valueHash ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("hash == MDefinition::valueHash()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 424); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hash == MDefinition::valueHash()" ")"); do { *((volatile int*)__null) = 424; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 425 | return hash; |
| 426 | } |
| 427 | |
| 428 | HashNumber MBinaryInstruction::valueHash() const { |
| 429 | HashNumber hash = HashNumber(op()); |
| 430 | hash = addU32ToHash(hash, getOperand(0)->id()); |
| 431 | hash = addU32ToHash(hash, getOperand(1)->id()); |
| 432 | if (MDefinition* dep = dependency()) { |
| 433 | hash = addU32ToHash(hash, dep->id()); |
| 434 | } |
| 435 | MOZ_ASSERT(hash == MDefinition::valueHash())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hash == MDefinition::valueHash())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hash == MDefinition::valueHash ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("hash == MDefinition::valueHash()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 435); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hash == MDefinition::valueHash()" ")"); do { *((volatile int*)__null) = 435; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 436 | return hash; |
| 437 | } |
| 438 | |
| 439 | HashNumber MTernaryInstruction::valueHash() const { |
| 440 | HashNumber hash = HashNumber(op()); |
| 441 | hash = addU32ToHash(hash, getOperand(0)->id()); |
| 442 | hash = addU32ToHash(hash, getOperand(1)->id()); |
| 443 | hash = addU32ToHash(hash, getOperand(2)->id()); |
| 444 | if (MDefinition* dep = dependency()) { |
| 445 | hash = addU32ToHash(hash, dep->id()); |
| 446 | } |
| 447 | MOZ_ASSERT(hash == MDefinition::valueHash())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hash == MDefinition::valueHash())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hash == MDefinition::valueHash ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("hash == MDefinition::valueHash()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 447); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hash == MDefinition::valueHash()" ")"); do { *((volatile int*)__null) = 447; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 448 | return hash; |
| 449 | } |
| 450 | |
| 451 | HashNumber MQuaternaryInstruction::valueHash() const { |
| 452 | HashNumber hash = HashNumber(op()); |
| 453 | hash = addU32ToHash(hash, getOperand(0)->id()); |
| 454 | hash = addU32ToHash(hash, getOperand(1)->id()); |
| 455 | hash = addU32ToHash(hash, getOperand(2)->id()); |
| 456 | hash = addU32ToHash(hash, getOperand(3)->id()); |
| 457 | if (MDefinition* dep = dependency()) { |
| 458 | hash = addU32ToHash(hash, dep->id()); |
| 459 | } |
| 460 | MOZ_ASSERT(hash == MDefinition::valueHash())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hash == MDefinition::valueHash())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hash == MDefinition::valueHash ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("hash == MDefinition::valueHash()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 460); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hash == MDefinition::valueHash()" ")"); do { *((volatile int*)__null) = 460; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 461 | return hash; |
| 462 | } |
| 463 | |
| 464 | const MDefinition* MDefinition::skipObjectGuards() const { |
| 465 | const MDefinition* result = this; |
| 466 | // These instructions don't modify the object and just guard specific |
| 467 | // properties. |
| 468 | while (true) { |
| 469 | if (result->isGuardShape()) { |
| 470 | result = result->toGuardShape()->object(); |
| 471 | continue; |
| 472 | } |
| 473 | if (result->isGuardNullProto()) { |
| 474 | result = result->toGuardNullProto()->object(); |
| 475 | continue; |
| 476 | } |
| 477 | if (result->isGuardProto()) { |
| 478 | result = result->toGuardProto()->object(); |
| 479 | continue; |
| 480 | } |
| 481 | |
| 482 | break; |
| 483 | } |
| 484 | |
| 485 | return result; |
| 486 | } |
| 487 | |
| 488 | bool MDefinition::congruentIfOperandsEqual(const MDefinition* ins) const { |
| 489 | if (op() != ins->op()) { |
| 490 | return false; |
| 491 | } |
| 492 | |
| 493 | if (type() != ins->type()) { |
| 494 | return false; |
| 495 | } |
| 496 | |
| 497 | if (isEffectful() || ins->isEffectful()) { |
| 498 | return false; |
| 499 | } |
| 500 | |
| 501 | if (numOperands() != ins->numOperands()) { |
| 502 | return false; |
| 503 | } |
| 504 | |
| 505 | for (size_t i = 0, e = numOperands(); i < e; i++) { |
| 506 | if (getOperand(i) != ins->getOperand(i)) { |
| 507 | return false; |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | return true; |
| 512 | } |
| 513 | |
| 514 | MDefinition* MDefinition::foldsTo(TempAllocator& alloc) { |
| 515 | // In the default case, there are no constants to fold. |
| 516 | return this; |
| 517 | } |
| 518 | |
| 519 | bool MDefinition::mightBeMagicType() const { |
| 520 | if (IsMagicType(type())) { |
| 521 | return true; |
| 522 | } |
| 523 | |
| 524 | if (MIRType::Value != type()) { |
| 525 | return false; |
| 526 | } |
| 527 | |
| 528 | return true; |
| 529 | } |
| 530 | |
| 531 | bool MDefinition::definitelyType(std::initializer_list<MIRType> types) const { |
| 532 | #ifdef DEBUG1 |
| 533 | // Only support specialized, non-magic types. |
| 534 | auto isSpecializedNonMagic = [](MIRType type) { |
| 535 | return type <= MIRType::Object; |
| 536 | }; |
| 537 | #endif |
| 538 | |
| 539 | MOZ_ASSERT(types.size() > 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(types.size() > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(types.size() > 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("types.size() > 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 539); AnnotateMozCrashReason("MOZ_ASSERT" "(" "types.size() > 0" ")"); do { *((volatile int*)__null) = 539; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 540 | MOZ_ASSERT(std::all_of(types.begin(), types.end(), isSpecializedNonMagic))do { static_assert( mozilla::detail::AssertionConditionType< decltype(std::all_of(types.begin(), types.end(), isSpecializedNonMagic ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(std::all_of(types.begin(), types.end(), isSpecializedNonMagic )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("std::all_of(types.begin(), types.end(), isSpecializedNonMagic)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 540); AnnotateMozCrashReason("MOZ_ASSERT" "(" "std::all_of(types.begin(), types.end(), isSpecializedNonMagic)" ")"); do { *((volatile int*)__null) = 540; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 541 | |
| 542 | if (type() == MIRType::Value) { |
| 543 | return false; |
| 544 | } |
| 545 | |
| 546 | return std::find(types.begin(), types.end(), type()) != types.end(); |
| 547 | } |
| 548 | |
| 549 | MDefinition* MInstruction::foldsToStore(TempAllocator& alloc) { |
| 550 | if (!dependency()) { |
| 551 | return nullptr; |
| 552 | } |
| 553 | |
| 554 | MDefinition* store = dependency(); |
| 555 | if (mightAlias(store) != AliasType::MustAlias) { |
| 556 | return nullptr; |
| 557 | } |
| 558 | |
| 559 | if (!store->block()->dominates(block())) { |
| 560 | return nullptr; |
| 561 | } |
| 562 | |
| 563 | MDefinition* value; |
| 564 | switch (store->op()) { |
| 565 | case Opcode::StoreFixedSlot: |
| 566 | value = store->toStoreFixedSlot()->value(); |
| 567 | break; |
| 568 | case Opcode::StoreDynamicSlot: |
| 569 | value = store->toStoreDynamicSlot()->value(); |
| 570 | break; |
| 571 | case Opcode::StoreElement: |
| 572 | value = store->toStoreElement()->value(); |
| 573 | break; |
| 574 | default: |
| 575 | MOZ_CRASH("unknown store")do { do { } while (false); MOZ_ReportCrash("" "unknown store" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 575); AnnotateMozCrashReason("MOZ_CRASH(" "unknown store" ")" ); do { *((volatile int*)__null) = 575; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 576 | } |
| 577 | |
| 578 | // If the type are matching then we return the value which is used as |
| 579 | // argument of the store. |
| 580 | if (value->type() != type()) { |
| 581 | // If we expect to read a type which is more generic than the type seen |
| 582 | // by the store, then we box the value used by the store. |
| 583 | if (type() != MIRType::Value) { |
| 584 | return nullptr; |
| 585 | } |
| 586 | |
| 587 | MOZ_ASSERT(value->type() < MIRType::Value)do { static_assert( mozilla::detail::AssertionConditionType< decltype(value->type() < MIRType::Value)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(value->type() < MIRType ::Value))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("value->type() < MIRType::Value", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 587); AnnotateMozCrashReason("MOZ_ASSERT" "(" "value->type() < MIRType::Value" ")"); do { *((volatile int*)__null) = 587; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 588 | MBox* box = MBox::New(alloc, value); |
| 589 | value = box; |
| 590 | } |
| 591 | |
| 592 | return value; |
| 593 | } |
| 594 | |
| 595 | void MDefinition::analyzeEdgeCasesForward() {} |
| 596 | |
| 597 | void MDefinition::analyzeEdgeCasesBackward() {} |
| 598 | |
| 599 | void MInstruction::setResumePoint(MResumePoint* resumePoint) { |
| 600 | MOZ_ASSERT(!resumePoint_)do { static_assert( mozilla::detail::AssertionConditionType< decltype(!resumePoint_)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!resumePoint_))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!resumePoint_", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 600); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!resumePoint_" ")"); do { *((volatile int*)__null) = 600; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 601 | resumePoint_ = resumePoint; |
| 602 | resumePoint_->setInstruction(this); |
| 603 | } |
| 604 | |
| 605 | void MInstruction::stealResumePoint(MInstruction* other) { |
| 606 | MResumePoint* resumePoint = other->resumePoint_; |
| 607 | other->resumePoint_ = nullptr; |
| 608 | |
| 609 | resumePoint->resetInstruction(); |
| 610 | setResumePoint(resumePoint); |
| 611 | } |
| 612 | |
| 613 | void MInstruction::moveResumePointAsEntry() { |
| 614 | MOZ_ASSERT(isNop())do { static_assert( mozilla::detail::AssertionConditionType< decltype(isNop())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(isNop()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("isNop()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 614); AnnotateMozCrashReason("MOZ_ASSERT" "(" "isNop()" ")" ); do { *((volatile int*)__null) = 614; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 615 | block()->clearEntryResumePoint(); |
| 616 | block()->setEntryResumePoint(resumePoint_); |
| 617 | resumePoint_->resetInstruction(); |
| 618 | resumePoint_ = nullptr; |
| 619 | } |
| 620 | |
| 621 | void MInstruction::clearResumePoint() { |
| 622 | resumePoint_->resetInstruction(); |
| 623 | block()->discardPreAllocatedResumePoint(resumePoint_); |
| 624 | resumePoint_ = nullptr; |
| 625 | } |
| 626 | |
| 627 | MDefinition* MTest::foldsDoubleNegation(TempAllocator& alloc) { |
| 628 | MDefinition* op = getOperand(0); |
| 629 | |
| 630 | if (op->isNot()) { |
| 631 | // If the operand of the Not is itself a Not, they cancel out. |
| 632 | MDefinition* opop = op->getOperand(0); |
| 633 | if (opop->isNot()) { |
| 634 | return MTest::New(alloc, opop->toNot()->input(), ifTrue(), ifFalse()); |
| 635 | } |
| 636 | return MTest::New(alloc, op->toNot()->input(), ifFalse(), ifTrue()); |
| 637 | } |
| 638 | return nullptr; |
| 639 | } |
| 640 | |
| 641 | MDefinition* MTest::foldsConstant(TempAllocator& alloc) { |
| 642 | MDefinition* op = getOperand(0); |
| 643 | if (MConstant* opConst = op->maybeConstantValue()) { |
| 644 | bool b; |
| 645 | if (opConst->valueToBoolean(&b)) { |
| 646 | return MGoto::New(alloc, b ? ifTrue() : ifFalse()); |
| 647 | } |
| 648 | } |
| 649 | return nullptr; |
| 650 | } |
| 651 | |
| 652 | MDefinition* MTest::foldsTypes(TempAllocator& alloc) { |
| 653 | MDefinition* op = getOperand(0); |
| 654 | |
| 655 | switch (op->type()) { |
| 656 | case MIRType::Undefined: |
| 657 | case MIRType::Null: |
| 658 | return MGoto::New(alloc, ifFalse()); |
| 659 | case MIRType::Symbol: |
| 660 | return MGoto::New(alloc, ifTrue()); |
| 661 | default: |
| 662 | break; |
| 663 | } |
| 664 | return nullptr; |
| 665 | } |
| 666 | |
| 667 | class UsesIterator { |
| 668 | MDefinition* def_; |
| 669 | |
| 670 | public: |
| 671 | explicit UsesIterator(MDefinition* def) : def_(def) {} |
| 672 | auto begin() const { return def_->usesBegin(); } |
| 673 | auto end() const { return def_->usesEnd(); } |
| 674 | }; |
| 675 | |
| 676 | static bool AllInstructionsDeadIfUnused(MBasicBlock* block) { |
| 677 | for (auto* ins : *block) { |
| 678 | // Skip trivial instructions. |
| 679 | if (ins->isNop() || ins->isGoto()) { |
| 680 | continue; |
| 681 | } |
| 682 | |
| 683 | // All uses must be within the current block. |
| 684 | for (auto* use : UsesIterator(ins)) { |
| 685 | if (use->consumer()->block() != block) { |
| 686 | return false; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | // All instructions within this block must be dead if unused. |
| 691 | if (!DeadIfUnused(ins)) { |
| 692 | return false; |
| 693 | } |
| 694 | } |
| 695 | return true; |
| 696 | } |
| 697 | |
| 698 | MDefinition* MTest::foldsNeedlessControlFlow(TempAllocator& alloc) { |
| 699 | // All instructions within both successors need be dead if unused. |
| 700 | if (!AllInstructionsDeadIfUnused(ifTrue()) || |
| 701 | !AllInstructionsDeadIfUnused(ifFalse())) { |
| 702 | return nullptr; |
| 703 | } |
| 704 | |
| 705 | // Both successors must have the same target successor. |
| 706 | if (ifTrue()->numSuccessors() != 1 || ifFalse()->numSuccessors() != 1) { |
| 707 | return nullptr; |
| 708 | } |
| 709 | if (ifTrue()->getSuccessor(0) != ifFalse()->getSuccessor(0)) { |
| 710 | return nullptr; |
| 711 | } |
| 712 | |
| 713 | // The target successor's phis must be redundant. Redundant phis should have |
| 714 | // been removed in an earlier pass, so only check if any phis are present, |
| 715 | // which is a stronger condition. |
| 716 | if (ifTrue()->successorWithPhis()) { |
| 717 | return nullptr; |
| 718 | } |
| 719 | |
| 720 | return MGoto::New(alloc, ifTrue()); |
| 721 | } |
| 722 | |
| 723 | // If a test is dominated by either the true or false path of a previous test of |
| 724 | // the same condition, then the test is redundant and can be converted into a |
| 725 | // goto true or goto false, respectively. |
| 726 | MDefinition* MTest::foldsRedundantTest(TempAllocator& alloc) { |
| 727 | MBasicBlock* myBlock = this->block(); |
| 728 | MDefinition* originalInput = getOperand(0); |
| 729 | |
| 730 | // Handle single and double negatives. This ensures that we do not miss a |
| 731 | // folding opportunity due to a condition being inverted. |
| 732 | MDefinition* newInput = input(); |
| 733 | bool inverted = false; |
| 734 | if (originalInput->isNot()) { |
| 735 | newInput = originalInput->toNot()->input(); |
| 736 | inverted = true; |
| 737 | if (originalInput->toNot()->input()->isNot()) { |
| 738 | newInput = originalInput->toNot()->input()->toNot()->input(); |
| 739 | inverted = false; |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | // The specific order of traversal does not matter. If there are multiple |
| 744 | // dominating redundant tests, they will either agree on direction (in which |
| 745 | // case we will prune the same way regardless of order), or they will |
| 746 | // disagree, in which case we will eventually be marked entirely dead by the |
| 747 | // folding of the redundant parent. |
| 748 | for (MUseIterator i(newInput->usesBegin()), e(newInput->usesEnd()); i != e; |
| 749 | ++i) { |
| 750 | if (!i->consumer()->isDefinition()) { |
| 751 | continue; |
| 752 | } |
| 753 | if (!i->consumer()->toDefinition()->isTest()) { |
| 754 | continue; |
| 755 | } |
| 756 | MTest* otherTest = i->consumer()->toDefinition()->toTest(); |
| 757 | if (otherTest == this) { |
| 758 | continue; |
| 759 | } |
| 760 | |
| 761 | if (otherTest->ifFalse()->dominates(myBlock)) { |
| 762 | // This test cannot be true, so fold to a goto false. |
| 763 | return MGoto::New(alloc, inverted ? ifTrue() : ifFalse()); |
| 764 | } |
| 765 | if (otherTest->ifTrue()->dominates(myBlock)) { |
| 766 | // This test cannot be false, so fold to a goto true. |
| 767 | return MGoto::New(alloc, inverted ? ifFalse() : ifTrue()); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | return nullptr; |
| 772 | } |
| 773 | |
| 774 | MDefinition* MTest::foldsTo(TempAllocator& alloc) { |
| 775 | if (MDefinition* def = foldsRedundantTest(alloc)) { |
| 776 | return def; |
| 777 | } |
| 778 | |
| 779 | if (MDefinition* def = foldsDoubleNegation(alloc)) { |
| 780 | return def; |
| 781 | } |
| 782 | |
| 783 | if (MDefinition* def = foldsConstant(alloc)) { |
| 784 | return def; |
| 785 | } |
| 786 | |
| 787 | if (MDefinition* def = foldsTypes(alloc)) { |
| 788 | return def; |
| 789 | } |
| 790 | |
| 791 | if (MDefinition* def = foldsNeedlessControlFlow(alloc)) { |
| 792 | return def; |
| 793 | } |
| 794 | |
| 795 | return this; |
| 796 | } |
| 797 | |
| 798 | AliasSet MThrow::getAliasSet() const { |
| 799 | return AliasSet::Store(AliasSet::ExceptionState); |
| 800 | } |
| 801 | |
| 802 | AliasSet MThrowWithStack::getAliasSet() const { |
| 803 | return AliasSet::Store(AliasSet::ExceptionState); |
| 804 | } |
| 805 | |
| 806 | AliasSet MNewArrayDynamicLength::getAliasSet() const { |
| 807 | return AliasSet::Store(AliasSet::ExceptionState); |
| 808 | } |
| 809 | |
| 810 | AliasSet MNewTypedArrayDynamicLength::getAliasSet() const { |
| 811 | return AliasSet::Store(AliasSet::ExceptionState); |
| 812 | } |
| 813 | |
| 814 | #ifdef JS_JITSPEW1 |
| 815 | void MDefinition::printOpcode(GenericPrinter& out) const { |
| 816 | PrintOpcodeName(out, op()); |
| 817 | for (size_t j = 0, e = numOperands(); j < e; j++) { |
| 818 | out.printf(" "); |
| 819 | if (getUseFor(j)->hasProducer()) { |
| 820 | getOperand(j)->printName(out); |
| 821 | out.printf(":%s", StringFromMIRType(getOperand(j)->type())); |
| 822 | } else { |
| 823 | out.printf("(null)"); |
| 824 | } |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | void MDefinition::dump(GenericPrinter& out) const { |
| 829 | printName(out); |
| 830 | out.printf(":%s", StringFromMIRType(type())); |
| 831 | out.printf(" = "); |
| 832 | printOpcode(out); |
| 833 | out.printf("\n"); |
| 834 | |
| 835 | if (isInstruction()) { |
| 836 | if (MResumePoint* resume = toInstruction()->resumePoint()) { |
| 837 | resume->dump(out); |
| 838 | } |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | void MDefinition::dump() const { |
| 843 | Fprinter out(stderrstderr); |
| 844 | dump(out); |
| 845 | out.finish(); |
| 846 | } |
| 847 | |
| 848 | void MDefinition::dumpLocation(GenericPrinter& out) const { |
| 849 | MResumePoint* rp = nullptr; |
| 850 | const char* linkWord = nullptr; |
| 851 | if (isInstruction() && toInstruction()->resumePoint()) { |
| 852 | rp = toInstruction()->resumePoint(); |
| 853 | linkWord = "at"; |
| 854 | } else { |
| 855 | rp = block()->entryResumePoint(); |
| 856 | linkWord = "after"; |
| 857 | } |
| 858 | |
| 859 | while (rp) { |
| 860 | JSScript* script = rp->block()->info().script(); |
| 861 | uint32_t lineno = PCToLineNumber(rp->block()->info().script(), rp->pc()); |
| 862 | out.printf(" %s %s:%u\n", linkWord, script->filename(), lineno); |
| 863 | rp = rp->caller(); |
| 864 | linkWord = "in"; |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | void MDefinition::dumpLocation() const { |
| 869 | Fprinter out(stderrstderr); |
| 870 | dumpLocation(out); |
| 871 | out.finish(); |
| 872 | } |
| 873 | #endif |
| 874 | |
| 875 | #if defined(DEBUG1) || defined(JS_JITSPEW1) |
| 876 | size_t MDefinition::useCount() const { |
| 877 | size_t count = 0; |
| 878 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 879 | count++; |
| 880 | } |
| 881 | return count; |
| 882 | } |
| 883 | |
| 884 | size_t MDefinition::defUseCount() const { |
| 885 | size_t count = 0; |
| 886 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 887 | if ((*i)->consumer()->isDefinition()) { |
| 888 | count++; |
| 889 | } |
| 890 | } |
| 891 | return count; |
| 892 | } |
| 893 | #endif |
| 894 | |
| 895 | bool MDefinition::hasOneUse() const { |
| 896 | MUseIterator i(uses_.begin()); |
| 897 | if (i == uses_.end()) { |
| 898 | return false; |
| 899 | } |
| 900 | i++; |
| 901 | return i == uses_.end(); |
| 902 | } |
| 903 | |
| 904 | bool MDefinition::hasOneDefUse() const { |
| 905 | bool hasOneDefUse = false; |
| 906 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 907 | if (!(*i)->consumer()->isDefinition()) { |
| 908 | continue; |
| 909 | } |
| 910 | |
| 911 | // We already have a definition use. So 1+ |
| 912 | if (hasOneDefUse) { |
| 913 | return false; |
| 914 | } |
| 915 | |
| 916 | // We saw one definition. Loop to test if there is another. |
| 917 | hasOneDefUse = true; |
| 918 | } |
| 919 | |
| 920 | return hasOneDefUse; |
| 921 | } |
| 922 | |
| 923 | bool MDefinition::hasOneLiveDefUse() const { |
| 924 | bool hasOneDefUse = false; |
| 925 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 926 | if (!(*i)->consumer()->isDefinition()) { |
| 927 | continue; |
| 928 | } |
| 929 | |
| 930 | MDefinition* def = (*i)->consumer()->toDefinition(); |
| 931 | if (def->isRecoveredOnBailout()) { |
| 932 | continue; |
| 933 | } |
| 934 | |
| 935 | // We already have a definition use. So 1+ |
| 936 | if (hasOneDefUse) { |
| 937 | return false; |
| 938 | } |
| 939 | |
| 940 | // We saw one definition. Loop to test if there is another. |
| 941 | hasOneDefUse = true; |
| 942 | } |
| 943 | |
| 944 | return hasOneDefUse; |
| 945 | } |
| 946 | |
| 947 | bool MDefinition::hasDefUses() const { |
| 948 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 949 | if ((*i)->consumer()->isDefinition()) { |
| 950 | return true; |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | return false; |
| 955 | } |
| 956 | |
| 957 | bool MDefinition::hasLiveDefUses() const { |
| 958 | for (MUseIterator i(uses_.begin()); i != uses_.end(); i++) { |
| 959 | MNode* ins = (*i)->consumer(); |
| 960 | if (ins->isDefinition()) { |
| 961 | if (!ins->toDefinition()->isRecoveredOnBailout()) { |
| 962 | return true; |
| 963 | } |
| 964 | } else { |
| 965 | MOZ_ASSERT(ins->isResumePoint())do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->isResumePoint())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->isResumePoint()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("ins->isResumePoint()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 965); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->isResumePoint()" ")"); do { *((volatile int*)__null) = 965; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 966 | if (!ins->toResumePoint()->isRecoverableOperand(*i)) { |
| 967 | return true; |
| 968 | } |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | return false; |
| 973 | } |
| 974 | |
| 975 | MDefinition* MDefinition::maybeSingleDefUse() const { |
| 976 | MUseDefIterator use(this); |
| 977 | if (!use) { |
| 978 | // No def-uses. |
| 979 | return nullptr; |
| 980 | } |
| 981 | |
| 982 | MDefinition* useDef = use.def(); |
| 983 | |
| 984 | use++; |
| 985 | if (use) { |
| 986 | // More than one def-use. |
| 987 | return nullptr; |
| 988 | } |
| 989 | |
| 990 | return useDef; |
| 991 | } |
| 992 | |
| 993 | MDefinition* MDefinition::maybeMostRecentlyAddedDefUse() const { |
| 994 | MUseDefIterator use(this); |
| 995 | if (!use) { |
| 996 | // No def-uses. |
| 997 | return nullptr; |
| 998 | } |
| 999 | |
| 1000 | MDefinition* mostRecentUse = use.def(); |
| 1001 | |
| 1002 | #ifdef DEBUG1 |
| 1003 | // This function relies on addUse adding new uses to the front of the list. |
| 1004 | // Check this invariant by asserting the next few uses are 'older'. Skip this |
| 1005 | // for phis because setBackedge can add a new use for a loop phi even if the |
| 1006 | // loop body has a use with an id greater than the loop phi's id. |
| 1007 | if (!mostRecentUse->isPhi()) { |
| 1008 | static constexpr size_t NumUsesToCheck = 3; |
| 1009 | use++; |
| 1010 | for (size_t i = 0; use && i < NumUsesToCheck; i++, use++) { |
| 1011 | MOZ_ASSERT(use.def()->id() <= mostRecentUse->id())do { static_assert( mozilla::detail::AssertionConditionType< decltype(use.def()->id() <= mostRecentUse->id())> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(use.def()->id() <= mostRecentUse->id()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("use.def()->id() <= mostRecentUse->id()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1011); AnnotateMozCrashReason("MOZ_ASSERT" "(" "use.def()->id() <= mostRecentUse->id()" ")"); do { *((volatile int*)__null) = 1011; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1012 | } |
| 1013 | } |
| 1014 | #endif |
| 1015 | |
| 1016 | return mostRecentUse; |
| 1017 | } |
| 1018 | |
| 1019 | void MDefinition::replaceAllUsesWith(MDefinition* dom) { |
| 1020 | for (size_t i = 0, e = numOperands(); i < e; ++i) { |
| 1021 | getOperand(i)->setImplicitlyUsedUnchecked(); |
| 1022 | } |
| 1023 | |
| 1024 | justReplaceAllUsesWith(dom); |
| 1025 | } |
| 1026 | |
| 1027 | void MDefinition::justReplaceAllUsesWith(MDefinition* dom) { |
| 1028 | MOZ_ASSERT(dom != nullptr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dom != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dom != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("dom != nullptr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1028); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dom != nullptr" ")"); do { *((volatile int*)__null) = 1028; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1029 | MOZ_ASSERT(dom != this)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dom != this)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dom != this))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("dom != this", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1029); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dom != this" ")"); do { *((volatile int*)__null) = 1029; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1030 | |
| 1031 | // Carry over the fact the value has uses which are no longer inspectable |
| 1032 | // with the graph. |
| 1033 | if (isImplicitlyUsed()) { |
| 1034 | dom->setImplicitlyUsedUnchecked(); |
| 1035 | } |
| 1036 | |
| 1037 | for (MUseIterator i(usesBegin()), e(usesEnd()); i != e; ++i) { |
| 1038 | i->setProducerUnchecked(dom); |
| 1039 | } |
| 1040 | dom->uses_.takeElements(uses_); |
| 1041 | } |
| 1042 | |
| 1043 | bool MDefinition::optimizeOutAllUses(TempAllocator& alloc) { |
| 1044 | for (MUseIterator i(usesBegin()), e(usesEnd()); i != e;) { |
| 1045 | MUse* use = *i++; |
| 1046 | MConstant* constant = use->consumer()->block()->optimizedOutConstant(alloc); |
| 1047 | if (!alloc.ensureBallast()) { |
| 1048 | return false; |
| 1049 | } |
| 1050 | |
| 1051 | // Update the resume point operand to use the optimized-out constant. |
| 1052 | use->setProducerUnchecked(constant); |
| 1053 | constant->addUseUnchecked(use); |
| 1054 | } |
| 1055 | |
| 1056 | // Remove dangling pointers. |
| 1057 | this->uses_.clear(); |
| 1058 | return true; |
| 1059 | } |
| 1060 | |
| 1061 | void MDefinition::replaceAllLiveUsesWith(MDefinition* dom) { |
| 1062 | for (MUseIterator i(usesBegin()), e(usesEnd()); i != e;) { |
| 1063 | MUse* use = *i++; |
| 1064 | MNode* consumer = use->consumer(); |
| 1065 | if (consumer->isResumePoint()) { |
| 1066 | continue; |
| 1067 | } |
| 1068 | if (consumer->isDefinition() && |
| 1069 | consumer->toDefinition()->isRecoveredOnBailout()) { |
| 1070 | continue; |
| 1071 | } |
| 1072 | |
| 1073 | // Update the operand to use the dominating definition. |
| 1074 | use->replaceProducer(dom); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | MConstant* MConstant::New(TempAllocator& alloc, const Value& v) { |
| 1079 | return new (alloc) MConstant(alloc, v); |
| 1080 | } |
| 1081 | |
| 1082 | MConstant* MConstant::New(TempAllocator::Fallible alloc, const Value& v) { |
| 1083 | return new (alloc) MConstant(alloc.alloc, v); |
| 1084 | } |
| 1085 | |
| 1086 | MConstant* MConstant::NewFloat32(TempAllocator& alloc, double d) { |
| 1087 | MOZ_ASSERT(std::isnan(d) || d == double(float(d)))do { static_assert( mozilla::detail::AssertionConditionType< decltype(std::isnan(d) || d == double(float(d)))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(std::isnan(d) || d == double(float(d))))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("std::isnan(d) || d == double(float(d))" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1087); AnnotateMozCrashReason("MOZ_ASSERT" "(" "std::isnan(d) || d == double(float(d))" ")"); do { *((volatile int*)__null) = 1087; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1088 | return new (alloc) MConstant(float(d)); |
| 1089 | } |
| 1090 | |
| 1091 | MConstant* MConstant::NewInt64(TempAllocator& alloc, int64_t i) { |
| 1092 | return new (alloc) MConstant(MIRType::Int64, i); |
| 1093 | } |
| 1094 | |
| 1095 | MConstant* MConstant::NewIntPtr(TempAllocator& alloc, intptr_t i) { |
| 1096 | return new (alloc) MConstant(MIRType::IntPtr, i); |
| 1097 | } |
| 1098 | |
| 1099 | MConstant* MConstant::New(TempAllocator& alloc, const Value& v, MIRType type) { |
| 1100 | if (type == MIRType::Float32) { |
| 1101 | return NewFloat32(alloc, v.toNumber()); |
| 1102 | } |
| 1103 | MConstant* res = New(alloc, v); |
| 1104 | MOZ_ASSERT(res->type() == type)do { static_assert( mozilla::detail::AssertionConditionType< decltype(res->type() == type)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(res->type() == type))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("res->type() == type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1104); AnnotateMozCrashReason("MOZ_ASSERT" "(" "res->type() == type" ")"); do { *((volatile int*)__null) = 1104; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1105 | return res; |
| 1106 | } |
| 1107 | |
| 1108 | MConstant* MConstant::NewObject(TempAllocator& alloc, JSObject* v) { |
| 1109 | return new (alloc) MConstant(v); |
| 1110 | } |
| 1111 | |
| 1112 | MConstant* MConstant::NewShape(TempAllocator& alloc, Shape* s) { |
| 1113 | return new (alloc) MConstant(s); |
| 1114 | } |
| 1115 | |
| 1116 | static MIRType MIRTypeFromValue(const js::Value& vp) { |
| 1117 | if (vp.isDouble()) { |
| 1118 | return MIRType::Double; |
| 1119 | } |
| 1120 | if (vp.isMagic()) { |
| 1121 | switch (vp.whyMagic()) { |
| 1122 | case JS_OPTIMIZED_OUT: |
| 1123 | return MIRType::MagicOptimizedOut; |
| 1124 | case JS_ELEMENTS_HOLE: |
| 1125 | return MIRType::MagicHole; |
| 1126 | case JS_IS_CONSTRUCTING: |
| 1127 | return MIRType::MagicIsConstructing; |
| 1128 | case JS_UNINITIALIZED_LEXICAL: |
| 1129 | return MIRType::MagicUninitializedLexical; |
| 1130 | default: |
| 1131 | MOZ_ASSERT_UNREACHABLE("Unexpected magic constant")do { static_assert( mozilla::detail::AssertionConditionType< decltype(false)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("false" " (" "MOZ_ASSERT_UNREACHABLE: " "Unexpected magic constant" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1131); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Unexpected magic constant" ")"); do { *((volatile int*)__null) = 1131; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1132 | } |
| 1133 | } |
| 1134 | return MIRTypeFromValueType(vp.extractNonDoubleType()); |
| 1135 | } |
| 1136 | |
| 1137 | MConstant::MConstant(TempAllocator& alloc, const js::Value& vp) |
| 1138 | : MNullaryInstruction(classOpcode) { |
| 1139 | setResultType(MIRTypeFromValue(vp)); |
| 1140 | |
| 1141 | MOZ_ASSERT(payload_.asBits == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(payload_.asBits == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(payload_.asBits == 0))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("payload_.asBits == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1141); AnnotateMozCrashReason("MOZ_ASSERT" "(" "payload_.asBits == 0" ")"); do { *((volatile int*)__null) = 1141; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1142 | |
| 1143 | switch (type()) { |
| 1144 | case MIRType::Undefined: |
| 1145 | case MIRType::Null: |
| 1146 | break; |
| 1147 | case MIRType::Boolean: |
| 1148 | payload_.b = vp.toBoolean(); |
| 1149 | break; |
| 1150 | case MIRType::Int32: |
| 1151 | payload_.i32 = vp.toInt32(); |
| 1152 | break; |
| 1153 | case MIRType::Double: |
| 1154 | payload_.d = vp.toDouble(); |
| 1155 | break; |
| 1156 | case MIRType::String: { |
| 1157 | JSString* str = vp.toString(); |
| 1158 | if (str->isAtomRef()) { |
| 1159 | str = str->atom(); |
| 1160 | } |
| 1161 | MOZ_ASSERT(!IsInsideNursery(str))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsInsideNursery(str))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsInsideNursery(str)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("!IsInsideNursery(str)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1161); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsInsideNursery(str)" ")"); do { *((volatile int*)__null) = 1161; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1162 | MOZ_ASSERT(str->isAtom())do { static_assert( mozilla::detail::AssertionConditionType< decltype(str->isAtom())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(str->isAtom()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("str->isAtom()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1162); AnnotateMozCrashReason("MOZ_ASSERT" "(" "str->isAtom()" ")"); do { *((volatile int*)__null) = 1162; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1163 | payload_.str = vp.toString(); |
| 1164 | break; |
| 1165 | } |
| 1166 | case MIRType::Symbol: |
| 1167 | payload_.sym = vp.toSymbol(); |
| 1168 | break; |
| 1169 | case MIRType::BigInt: |
| 1170 | MOZ_ASSERT(!IsInsideNursery(vp.toBigInt()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsInsideNursery(vp.toBigInt()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsInsideNursery(vp.toBigInt ())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!IsInsideNursery(vp.toBigInt())", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1170); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsInsideNursery(vp.toBigInt())" ")"); do { *((volatile int*)__null) = 1170; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1171 | payload_.bi = vp.toBigInt(); |
| 1172 | break; |
| 1173 | case MIRType::Object: |
| 1174 | MOZ_ASSERT(!IsInsideNursery(&vp.toObject()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsInsideNursery(&vp.toObject()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsInsideNursery(&vp.toObject ())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!IsInsideNursery(&vp.toObject())", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1174); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsInsideNursery(&vp.toObject())" ")"); do { *((volatile int*)__null) = 1174; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1175 | payload_.obj = &vp.toObject(); |
| 1176 | break; |
| 1177 | case MIRType::MagicOptimizedOut: |
| 1178 | case MIRType::MagicHole: |
| 1179 | case MIRType::MagicIsConstructing: |
| 1180 | case MIRType::MagicUninitializedLexical: |
| 1181 | break; |
| 1182 | default: |
| 1183 | MOZ_CRASH("Unexpected type")do { do { } while (false); MOZ_ReportCrash("" "Unexpected type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1183); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected type" ")"); do { *((volatile int*)__null) = 1183; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 1184 | } |
| 1185 | |
| 1186 | setMovable(); |
| 1187 | } |
| 1188 | |
| 1189 | MConstant::MConstant(JSObject* obj) : MNullaryInstruction(classOpcode) { |
| 1190 | MOZ_ASSERT(!IsInsideNursery(obj))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsInsideNursery(obj))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsInsideNursery(obj)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("!IsInsideNursery(obj)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1190); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsInsideNursery(obj)" ")"); do { *((volatile int*)__null) = 1190; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1191 | setResultType(MIRType::Object); |
| 1192 | payload_.obj = obj; |
| 1193 | setMovable(); |
| 1194 | } |
| 1195 | |
| 1196 | MConstant::MConstant(Shape* shape) : MNullaryInstruction(classOpcode) { |
| 1197 | setResultType(MIRType::Shape); |
| 1198 | payload_.shape = shape; |
| 1199 | setMovable(); |
| 1200 | } |
| 1201 | |
| 1202 | MConstant::MConstant(float f) : MNullaryInstruction(classOpcode) { |
| 1203 | setResultType(MIRType::Float32); |
| 1204 | payload_.f = f; |
| 1205 | setMovable(); |
| 1206 | } |
| 1207 | |
| 1208 | MConstant::MConstant(MIRType type, int64_t i) |
| 1209 | : MNullaryInstruction(classOpcode) { |
| 1210 | MOZ_ASSERT(type == MIRType::Int64 || type == MIRType::IntPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type == MIRType::Int64 || type == MIRType::IntPtr)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(type == MIRType::Int64 || type == MIRType::IntPtr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("type == MIRType::Int64 || type == MIRType::IntPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1210); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type == MIRType::Int64 || type == MIRType::IntPtr" ")"); do { *((volatile int*)__null) = 1210; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1211 | setResultType(type); |
| 1212 | if (type == MIRType::Int64) { |
| 1213 | payload_.i64 = i; |
| 1214 | } else { |
| 1215 | payload_.iptr = i; |
| 1216 | } |
| 1217 | setMovable(); |
| 1218 | } |
| 1219 | |
| 1220 | #ifdef DEBUG1 |
| 1221 | void MConstant::assertInitializedPayload() const { |
| 1222 | // valueHash() and equals() expect the unused payload bits to be |
| 1223 | // initialized to zero. Assert this in debug builds. |
| 1224 | |
| 1225 | switch (type()) { |
| 1226 | case MIRType::Int32: |
| 1227 | case MIRType::Float32: |
| 1228 | # if MOZ_LITTLE_ENDIAN()1 |
| 1229 | MOZ_ASSERT((payload_.asBits >> 32) == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype((payload_.asBits >> 32) == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!((payload_.asBits >> 32 ) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("(payload_.asBits >> 32) == 0", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1229); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits >> 32) == 0" ")"); do { *((volatile int*)__null) = 1229; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1230 | # else |
| 1231 | MOZ_ASSERT((payload_.asBits << 32) == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype((payload_.asBits << 32) == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!((payload_.asBits << 32 ) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("(payload_.asBits << 32) == 0", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1231); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits << 32) == 0" ")"); do { *((volatile int*)__null) = 1231; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1232 | # endif |
| 1233 | break; |
| 1234 | case MIRType::Boolean: |
| 1235 | # if MOZ_LITTLE_ENDIAN()1 |
| 1236 | MOZ_ASSERT((payload_.asBits >> 1) == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype((payload_.asBits >> 1) == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!((payload_.asBits >> 1) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("(payload_.asBits >> 1) == 0", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1236); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits >> 1) == 0" ")"); do { *((volatile int*)__null) = 1236; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1237 | # else |
| 1238 | MOZ_ASSERT((payload_.asBits & ~(1ULL << 56)) == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype((payload_.asBits & ~(1ULL << 56)) == 0)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!((payload_.asBits & ~(1ULL << 56)) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(payload_.asBits & ~(1ULL << 56)) == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1238); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits & ~(1ULL << 56)) == 0" ")"); do { *((volatile int*)__null) = 1238; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1239 | # endif |
| 1240 | break; |
| 1241 | case MIRType::Double: |
| 1242 | case MIRType::Int64: |
| 1243 | break; |
| 1244 | case MIRType::String: |
| 1245 | case MIRType::Object: |
| 1246 | case MIRType::Symbol: |
| 1247 | case MIRType::BigInt: |
| 1248 | case MIRType::IntPtr: |
| 1249 | case MIRType::Shape: |
| 1250 | # if MOZ_LITTLE_ENDIAN()1 |
| 1251 | MOZ_ASSERT_IF(JS_BITS_PER_WORD == 32, (payload_.asBits >> 32) == 0)do { if (64 == 32) { do { static_assert( mozilla::detail::AssertionConditionType <decltype((payload_.asBits >> 32) == 0)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!((payload_.asBits >> 32) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(payload_.asBits >> 32) == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1251); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits >> 32) == 0" ")"); do { *((volatile int*)__null) = 1251; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1252 | # else |
| 1253 | MOZ_ASSERT_IF(JS_BITS_PER_WORD == 32, (payload_.asBits << 32) == 0)do { if (64 == 32) { do { static_assert( mozilla::detail::AssertionConditionType <decltype((payload_.asBits << 32) == 0)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!((payload_.asBits << 32) == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(payload_.asBits << 32) == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1253); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(payload_.asBits << 32) == 0" ")"); do { *((volatile int*)__null) = 1253; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1254 | # endif |
| 1255 | break; |
| 1256 | default: |
| 1257 | MOZ_ASSERT(IsNullOrUndefined(type()) || IsMagicType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNullOrUndefined(type()) || IsMagicType(type()))> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsNullOrUndefined(type()) || IsMagicType(type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsNullOrUndefined(type()) || IsMagicType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1257); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNullOrUndefined(type()) || IsMagicType(type())" ")"); do { *((volatile int*)__null) = 1257; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1258 | MOZ_ASSERT(payload_.asBits == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(payload_.asBits == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(payload_.asBits == 0))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("payload_.asBits == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1258); AnnotateMozCrashReason("MOZ_ASSERT" "(" "payload_.asBits == 0" ")"); do { *((volatile int*)__null) = 1258; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1259 | break; |
| 1260 | } |
| 1261 | } |
| 1262 | #endif |
| 1263 | |
| 1264 | HashNumber MConstant::valueHash() const { |
| 1265 | static_assert(sizeof(Payload) == sizeof(uint64_t), |
| 1266 | "Code below assumes payload fits in 64 bits"); |
| 1267 | |
| 1268 | assertInitializedPayload(); |
| 1269 | return ConstantValueHash(type(), payload_.asBits); |
| 1270 | } |
| 1271 | |
| 1272 | HashNumber MConstantProto::valueHash() const { |
| 1273 | HashNumber hash = protoObject()->valueHash(); |
| 1274 | const MDefinition* receiverObject = getReceiverObject(); |
| 1275 | if (receiverObject) { |
| 1276 | hash = addU32ToHash(hash, receiverObject->id()); |
| 1277 | } |
| 1278 | return hash; |
| 1279 | } |
| 1280 | |
| 1281 | bool MConstant::congruentTo(const MDefinition* ins) const { |
| 1282 | return ins->isConstant() && equals(ins->toConstant()); |
| 1283 | } |
| 1284 | |
| 1285 | #ifdef JS_JITSPEW1 |
| 1286 | void MConstant::printOpcode(GenericPrinter& out) const { |
| 1287 | PrintOpcodeName(out, op()); |
| 1288 | out.printf(" "); |
| 1289 | switch (type()) { |
| 1290 | case MIRType::Undefined: |
| 1291 | out.printf("undefined"); |
| 1292 | break; |
| 1293 | case MIRType::Null: |
| 1294 | out.printf("null"); |
| 1295 | break; |
| 1296 | case MIRType::Boolean: |
| 1297 | out.printf(toBoolean() ? "true" : "false"); |
| 1298 | break; |
| 1299 | case MIRType::Int32: |
| 1300 | out.printf("0x%x", uint32_t(toInt32())); |
| 1301 | break; |
| 1302 | case MIRType::Int64: |
| 1303 | out.printf("0x%" PRIx64"l" "x", uint64_t(toInt64())); |
| 1304 | break; |
| 1305 | case MIRType::IntPtr: |
| 1306 | out.printf("0x%" PRIxPTR"l" "x", uintptr_t(toIntPtr())); |
| 1307 | break; |
| 1308 | case MIRType::Double: |
| 1309 | out.printf("%.16g", toDouble()); |
| 1310 | break; |
| 1311 | case MIRType::Float32: { |
| 1312 | float val = toFloat32(); |
| 1313 | out.printf("%.16g", val); |
| 1314 | break; |
| 1315 | } |
| 1316 | case MIRType::Object: |
| 1317 | if (toObject().is<JSFunction>()) { |
| 1318 | JSFunction* fun = &toObject().as<JSFunction>(); |
| 1319 | if (fun->maybePartialDisplayAtom()) { |
| 1320 | out.put("function "); |
| 1321 | EscapedStringPrinter(out, fun->maybePartialDisplayAtom(), 0); |
| 1322 | } else { |
| 1323 | out.put("unnamed function"); |
| 1324 | } |
| 1325 | if (fun->hasBaseScript()) { |
| 1326 | BaseScript* script = fun->baseScript(); |
| 1327 | out.printf(" (%s:%u)", script->filename() ? script->filename() : "", |
| 1328 | script->lineno()); |
| 1329 | } |
| 1330 | out.printf(" at %p", (void*)fun); |
| 1331 | break; |
| 1332 | } |
| 1333 | out.printf("object %p (%s)", (void*)&toObject(), |
| 1334 | toObject().getClass()->name); |
| 1335 | break; |
| 1336 | case MIRType::Symbol: |
| 1337 | out.printf("symbol at %p", (void*)toSymbol()); |
| 1338 | break; |
| 1339 | case MIRType::BigInt: |
| 1340 | out.printf("BigInt at %p", (void*)toBigInt()); |
| 1341 | break; |
| 1342 | case MIRType::String: |
| 1343 | out.printf("string %p", (void*)toString()); |
| 1344 | break; |
| 1345 | case MIRType::Shape: |
| 1346 | out.printf("shape at %p", (void*)toShape()); |
| 1347 | break; |
| 1348 | case MIRType::MagicHole: |
| 1349 | out.printf("magic hole"); |
| 1350 | break; |
| 1351 | case MIRType::MagicIsConstructing: |
| 1352 | out.printf("magic is-constructing"); |
| 1353 | break; |
| 1354 | case MIRType::MagicOptimizedOut: |
| 1355 | out.printf("magic optimized-out"); |
| 1356 | break; |
| 1357 | case MIRType::MagicUninitializedLexical: |
| 1358 | out.printf("magic uninitialized-lexical"); |
| 1359 | break; |
| 1360 | default: |
| 1361 | MOZ_CRASH("unexpected type")do { do { } while (false); MOZ_ReportCrash("" "unexpected type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1361); AnnotateMozCrashReason("MOZ_CRASH(" "unexpected type" ")"); do { *((volatile int*)__null) = 1361; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 1362 | } |
| 1363 | } |
| 1364 | #endif |
| 1365 | |
| 1366 | bool MConstant::canProduceFloat32() const { |
| 1367 | if (!isTypeRepresentableAsDouble()) { |
| 1368 | return false; |
| 1369 | } |
| 1370 | |
| 1371 | if (type() == MIRType::Int32) { |
| 1372 | return IsFloat32Representable(static_cast<double>(toInt32())); |
| 1373 | } |
| 1374 | if (type() == MIRType::Double) { |
| 1375 | return IsFloat32Representable(toDouble()); |
| 1376 | } |
| 1377 | MOZ_ASSERT(type() == MIRType::Float32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Float32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Float32)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Float32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1377); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Float32" ")"); do { *((volatile int*)__null) = 1377; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1378 | return true; |
| 1379 | } |
| 1380 | |
| 1381 | Value MConstant::toJSValue() const { |
| 1382 | // Wasm has types like int64 that cannot be stored as js::Value. It also |
| 1383 | // doesn't want the NaN canonicalization enforced by js::Value. |
| 1384 | MOZ_ASSERT(!IsCompilingWasm())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsCompilingWasm())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsCompilingWasm()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!IsCompilingWasm()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1384); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsCompilingWasm()" ")"); do { *((volatile int*)__null) = 1384; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1385 | |
| 1386 | switch (type()) { |
| 1387 | case MIRType::Undefined: |
| 1388 | return UndefinedValue(); |
| 1389 | case MIRType::Null: |
| 1390 | return NullValue(); |
| 1391 | case MIRType::Boolean: |
| 1392 | return BooleanValue(toBoolean()); |
| 1393 | case MIRType::Int32: |
| 1394 | return Int32Value(toInt32()); |
| 1395 | case MIRType::Double: |
| 1396 | return DoubleValue(toDouble()); |
| 1397 | case MIRType::Float32: |
| 1398 | return Float32Value(toFloat32()); |
| 1399 | case MIRType::String: |
| 1400 | return StringValue(toString()); |
| 1401 | case MIRType::Symbol: |
| 1402 | return SymbolValue(toSymbol()); |
| 1403 | case MIRType::BigInt: |
| 1404 | return BigIntValue(toBigInt()); |
| 1405 | case MIRType::Object: |
| 1406 | return ObjectValue(toObject()); |
| 1407 | case MIRType::Shape: |
| 1408 | return PrivateGCThingValue(toShape()); |
| 1409 | case MIRType::MagicOptimizedOut: |
| 1410 | return MagicValue(JS_OPTIMIZED_OUT); |
| 1411 | case MIRType::MagicHole: |
| 1412 | return MagicValue(JS_ELEMENTS_HOLE); |
| 1413 | case MIRType::MagicIsConstructing: |
| 1414 | return MagicValue(JS_IS_CONSTRUCTING); |
| 1415 | case MIRType::MagicUninitializedLexical: |
| 1416 | return MagicValue(JS_UNINITIALIZED_LEXICAL); |
| 1417 | default: |
| 1418 | MOZ_CRASH("Unexpected type")do { do { } while (false); MOZ_ReportCrash("" "Unexpected type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1418); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected type" ")"); do { *((volatile int*)__null) = 1418; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | bool MConstant::valueToBoolean(bool* res) const { |
| 1423 | switch (type()) { |
| 1424 | case MIRType::Boolean: |
| 1425 | *res = toBoolean(); |
| 1426 | return true; |
| 1427 | case MIRType::Int32: |
| 1428 | *res = toInt32() != 0; |
| 1429 | return true; |
| 1430 | case MIRType::Int64: |
| 1431 | *res = toInt64() != 0; |
| 1432 | return true; |
| 1433 | case MIRType::Double: |
| 1434 | *res = !std::isnan(toDouble()) && toDouble() != 0.0; |
| 1435 | return true; |
| 1436 | case MIRType::Float32: |
| 1437 | *res = !std::isnan(toFloat32()) && toFloat32() != 0.0f; |
| 1438 | return true; |
| 1439 | case MIRType::Null: |
| 1440 | case MIRType::Undefined: |
| 1441 | *res = false; |
| 1442 | return true; |
| 1443 | case MIRType::Symbol: |
| 1444 | *res = true; |
| 1445 | return true; |
| 1446 | case MIRType::BigInt: |
| 1447 | *res = !toBigInt()->isZero(); |
| 1448 | return true; |
| 1449 | case MIRType::String: |
| 1450 | *res = toString()->length() != 0; |
| 1451 | return true; |
| 1452 | case MIRType::Object: |
| 1453 | // TODO(Warp): Lazy groups have been removed. |
| 1454 | // We have to call EmulatesUndefined but that reads obj->group->clasp |
| 1455 | // and so it's racy when the object has a lazy group. The main callers |
| 1456 | // of this (MTest, MNot) already know how to fold the object case, so |
| 1457 | // just give up. |
| 1458 | return false; |
| 1459 | default: |
| 1460 | MOZ_ASSERT(IsMagicType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsMagicType(type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsMagicType(type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsMagicType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1460); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsMagicType(type())" ")"); do { *((volatile int*)__null) = 1460; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1461 | return false; |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | #ifdef JS_JITSPEW1 |
| 1466 | void MControlInstruction::printOpcode(GenericPrinter& out) const { |
| 1467 | MDefinition::printOpcode(out); |
| 1468 | for (size_t j = 0; j < numSuccessors(); j++) { |
| 1469 | if (getSuccessor(j)) { |
| 1470 | out.printf(" block%u", getSuccessor(j)->id()); |
| 1471 | } else { |
| 1472 | out.printf(" (null-to-be-patched)"); |
| 1473 | } |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | void MCompare::printOpcode(GenericPrinter& out) const { |
| 1478 | MDefinition::printOpcode(out); |
| 1479 | out.printf(" %s", CodeName(jsop())); |
| 1480 | } |
| 1481 | |
| 1482 | void MTypeOfIs::printOpcode(GenericPrinter& out) const { |
| 1483 | MDefinition::printOpcode(out); |
| 1484 | out.printf(" %s", CodeName(jsop())); |
| 1485 | |
| 1486 | const char* name = ""; |
Value stored to 'name' during its initialization is never read | |
| 1487 | switch (jstype()) { |
| 1488 | case JSTYPE_UNDEFINED: |
| 1489 | name = "undefined"; |
| 1490 | break; |
| 1491 | case JSTYPE_OBJECT: |
| 1492 | name = "object"; |
| 1493 | break; |
| 1494 | case JSTYPE_FUNCTION: |
| 1495 | name = "function"; |
| 1496 | break; |
| 1497 | case JSTYPE_STRING: |
| 1498 | name = "string"; |
| 1499 | break; |
| 1500 | case JSTYPE_NUMBER: |
| 1501 | name = "number"; |
| 1502 | break; |
| 1503 | case JSTYPE_BOOLEAN: |
| 1504 | name = "boolean"; |
| 1505 | break; |
| 1506 | case JSTYPE_SYMBOL: |
| 1507 | name = "symbol"; |
| 1508 | break; |
| 1509 | case JSTYPE_BIGINT: |
| 1510 | name = "bigint"; |
| 1511 | break; |
| 1512 | # ifdef ENABLE_RECORD_TUPLE |
| 1513 | case JSTYPE_RECORD: |
| 1514 | case JSTYPE_TUPLE: |
| 1515 | # endif |
| 1516 | case JSTYPE_LIMIT: |
| 1517 | MOZ_CRASH("Unexpected type")do { do { } while (false); MOZ_ReportCrash("" "Unexpected type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1517); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected type" ")"); do { *((volatile int*)__null) = 1517; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 1518 | } |
| 1519 | out.printf(" '%s'", name); |
| 1520 | } |
| 1521 | |
| 1522 | void MLoadUnboxedScalar::printOpcode(GenericPrinter& out) const { |
| 1523 | MDefinition::printOpcode(out); |
| 1524 | out.printf(" %s", Scalar::name(storageType())); |
| 1525 | } |
| 1526 | |
| 1527 | void MLoadDataViewElement::printOpcode(GenericPrinter& out) const { |
| 1528 | MDefinition::printOpcode(out); |
| 1529 | out.printf(" %s", Scalar::name(storageType())); |
| 1530 | } |
| 1531 | |
| 1532 | void MAssertRange::printOpcode(GenericPrinter& out) const { |
| 1533 | MDefinition::printOpcode(out); |
| 1534 | out.put(" "); |
| 1535 | assertedRange()->dump(out); |
| 1536 | } |
| 1537 | |
| 1538 | void MNearbyInt::printOpcode(GenericPrinter& out) const { |
| 1539 | MDefinition::printOpcode(out); |
| 1540 | const char* roundingModeStr = nullptr; |
| 1541 | switch (roundingMode_) { |
| 1542 | case RoundingMode::Up: |
| 1543 | roundingModeStr = "(up)"; |
| 1544 | break; |
| 1545 | case RoundingMode::Down: |
| 1546 | roundingModeStr = "(down)"; |
| 1547 | break; |
| 1548 | case RoundingMode::NearestTiesToEven: |
| 1549 | roundingModeStr = "(nearest ties even)"; |
| 1550 | break; |
| 1551 | case RoundingMode::TowardsZero: |
| 1552 | roundingModeStr = "(towards zero)"; |
| 1553 | break; |
| 1554 | } |
| 1555 | out.printf(" %s", roundingModeStr); |
| 1556 | } |
| 1557 | #endif |
| 1558 | |
| 1559 | AliasSet MRandom::getAliasSet() const { return AliasSet::Store(AliasSet::RNG); } |
| 1560 | |
| 1561 | MDefinition* MSign::foldsTo(TempAllocator& alloc) { |
| 1562 | MDefinition* input = getOperand(0); |
| 1563 | if (!input->isConstant() || |
| 1564 | !input->toConstant()->isTypeRepresentableAsDouble()) { |
| 1565 | return this; |
| 1566 | } |
| 1567 | |
| 1568 | double in = input->toConstant()->numberToDouble(); |
| 1569 | double out = js::math_sign_impl(in); |
| 1570 | |
| 1571 | if (type() == MIRType::Int32) { |
| 1572 | // Decline folding if this is an int32 operation, but the result type |
| 1573 | // isn't an int32. |
| 1574 | Value outValue = NumberValue(out); |
| 1575 | if (!outValue.isInt32()) { |
| 1576 | return this; |
| 1577 | } |
| 1578 | |
| 1579 | return MConstant::New(alloc, outValue); |
| 1580 | } |
| 1581 | |
| 1582 | return MConstant::New(alloc, DoubleValue(out)); |
| 1583 | } |
| 1584 | |
| 1585 | const char* MMathFunction::FunctionName(UnaryMathFunction function) { |
| 1586 | return GetUnaryMathFunctionName(function); |
| 1587 | } |
| 1588 | |
| 1589 | #ifdef JS_JITSPEW1 |
| 1590 | void MMathFunction::printOpcode(GenericPrinter& out) const { |
| 1591 | MDefinition::printOpcode(out); |
| 1592 | out.printf(" %s", FunctionName(function())); |
| 1593 | } |
| 1594 | #endif |
| 1595 | |
| 1596 | MDefinition* MMathFunction::foldsTo(TempAllocator& alloc) { |
| 1597 | MDefinition* input = getOperand(0); |
| 1598 | if (!input->isConstant() || |
| 1599 | !input->toConstant()->isTypeRepresentableAsDouble()) { |
| 1600 | return this; |
| 1601 | } |
| 1602 | |
| 1603 | UnaryMathFunctionType funPtr = GetUnaryMathFunctionPtr(function()); |
| 1604 | |
| 1605 | double in = input->toConstant()->numberToDouble(); |
| 1606 | |
| 1607 | // The function pointer call can't GC. |
| 1608 | JS::AutoSuppressGCAnalysis nogc; |
| 1609 | double out = funPtr(in); |
| 1610 | |
| 1611 | if (input->type() == MIRType::Float32) { |
| 1612 | return MConstant::NewFloat32(alloc, out); |
| 1613 | } |
| 1614 | return MConstant::New(alloc, DoubleValue(out)); |
| 1615 | } |
| 1616 | |
| 1617 | MDefinition* MAtomicIsLockFree::foldsTo(TempAllocator& alloc) { |
| 1618 | MDefinition* input = getOperand(0); |
| 1619 | if (!input->isConstant() || input->type() != MIRType::Int32) { |
| 1620 | return this; |
| 1621 | } |
| 1622 | |
| 1623 | int32_t i = input->toConstant()->toInt32(); |
| 1624 | return MConstant::New(alloc, BooleanValue(AtomicOperations::isLockfreeJS(i))); |
| 1625 | } |
| 1626 | |
| 1627 | // Define |THIS_SLOT| as part of this translation unit, as it is used to |
| 1628 | // specialized the parameterized |New| function calls introduced by |
| 1629 | // TRIVIAL_NEW_WRAPPERS. |
| 1630 | const int32_t MParameter::THIS_SLOT; |
| 1631 | |
| 1632 | #ifdef JS_JITSPEW1 |
| 1633 | void MParameter::printOpcode(GenericPrinter& out) const { |
| 1634 | PrintOpcodeName(out, op()); |
| 1635 | if (index() == THIS_SLOT) { |
| 1636 | out.printf(" THIS_SLOT"); |
| 1637 | } else { |
| 1638 | out.printf(" %d", index()); |
| 1639 | } |
| 1640 | } |
| 1641 | #endif |
| 1642 | |
| 1643 | HashNumber MParameter::valueHash() const { |
| 1644 | HashNumber hash = MDefinition::valueHash(); |
| 1645 | hash = addU32ToHash(hash, index_); |
| 1646 | return hash; |
| 1647 | } |
| 1648 | |
| 1649 | bool MParameter::congruentTo(const MDefinition* ins) const { |
| 1650 | if (!ins->isParameter()) { |
| 1651 | return false; |
| 1652 | } |
| 1653 | |
| 1654 | return ins->toParameter()->index() == index_; |
| 1655 | } |
| 1656 | |
| 1657 | WrappedFunction::WrappedFunction(JSFunction* nativeFun, uint16_t nargs, |
| 1658 | FunctionFlags flags) |
| 1659 | : nativeFun_(nativeFun), nargs_(nargs), flags_(flags) { |
| 1660 | MOZ_ASSERT_IF(nativeFun, isNativeWithoutJitEntry())do { if (nativeFun) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(isNativeWithoutJitEntry())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(isNativeWithoutJitEntry()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("isNativeWithoutJitEntry()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1660); AnnotateMozCrashReason("MOZ_ASSERT" "(" "isNativeWithoutJitEntry()" ")"); do { *((volatile int*)__null) = 1660; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1661 | |
| 1662 | #ifdef DEBUG1 |
| 1663 | // If we are not running off-main thread we can assert that the |
| 1664 | // metadata is consistent. |
| 1665 | if (!CanUseExtraThreads() && nativeFun) { |
| 1666 | MOZ_ASSERT(nativeFun->nargs() == nargs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->nargs() == nargs)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(nativeFun->nargs() == nargs ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "nativeFun->nargs() == nargs", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1666); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->nargs() == nargs" ")"); do { *((volatile int*)__null) = 1666; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1667 | |
| 1668 | MOZ_ASSERT(nativeFun->isNativeWithoutJitEntry() ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1669); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry()" ")"); do { *((volatile int*)__null) = 1669; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1669 | isNativeWithoutJitEntry())do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1669); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->isNativeWithoutJitEntry() == isNativeWithoutJitEntry()" ")"); do { *((volatile int*)__null) = 1669; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1670 | MOZ_ASSERT(nativeFun->hasJitEntry() == hasJitEntry())do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->hasJitEntry() == hasJitEntry())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(nativeFun->hasJitEntry() == hasJitEntry()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("nativeFun->hasJitEntry() == hasJitEntry()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1670); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->hasJitEntry() == hasJitEntry()" ")"); do { *((volatile int*)__null) = 1670; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1671 | MOZ_ASSERT(nativeFun->isConstructor() == isConstructor())do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->isConstructor() == isConstructor())> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(nativeFun->isConstructor() == isConstructor()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("nativeFun->isConstructor() == isConstructor()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1671); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->isConstructor() == isConstructor()" ")"); do { *((volatile int*)__null) = 1671; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1672 | MOZ_ASSERT(nativeFun->isClassConstructor() == isClassConstructor())do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeFun->isClassConstructor() == isClassConstructor ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(nativeFun->isClassConstructor() == isClassConstructor ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("nativeFun->isClassConstructor() == isClassConstructor()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1672); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeFun->isClassConstructor() == isClassConstructor()" ")"); do { *((volatile int*)__null) = 1672; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1673 | } |
| 1674 | #endif |
| 1675 | } |
| 1676 | |
| 1677 | MCall* MCall::New(TempAllocator& alloc, WrappedFunction* target, size_t maxArgc, |
| 1678 | size_t numActualArgs, bool construct, bool ignoresReturnValue, |
| 1679 | bool isDOMCall, mozilla::Maybe<DOMObjectKind> objectKind) { |
| 1680 | MOZ_ASSERT(isDOMCall == objectKind.isSome())do { static_assert( mozilla::detail::AssertionConditionType< decltype(isDOMCall == objectKind.isSome())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(isDOMCall == objectKind.isSome ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("isDOMCall == objectKind.isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1680); AnnotateMozCrashReason("MOZ_ASSERT" "(" "isDOMCall == objectKind.isSome()" ")"); do { *((volatile int*)__null) = 1680; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1681 | MOZ_ASSERT(maxArgc >= numActualArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(maxArgc >= numActualArgs)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(maxArgc >= numActualArgs) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("maxArgc >= numActualArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1681); AnnotateMozCrashReason("MOZ_ASSERT" "(" "maxArgc >= numActualArgs" ")"); do { *((volatile int*)__null) = 1681; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1682 | MCall* ins; |
| 1683 | if (isDOMCall) { |
| 1684 | MOZ_ASSERT(!construct)do { static_assert( mozilla::detail::AssertionConditionType< decltype(!construct)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!construct))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!construct", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1684); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!construct" ")"); do { *((volatile int*)__null) = 1684; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1685 | ins = new (alloc) MCallDOMNative(target, numActualArgs, *objectKind); |
| 1686 | } else { |
| 1687 | ins = |
| 1688 | new (alloc) MCall(target, numActualArgs, construct, ignoresReturnValue); |
| 1689 | } |
| 1690 | if (!ins->init(alloc, maxArgc + NumNonArgumentOperands)) { |
| 1691 | return nullptr; |
| 1692 | } |
| 1693 | return ins; |
| 1694 | } |
| 1695 | |
| 1696 | AliasSet MCallDOMNative::getAliasSet() const { |
| 1697 | const JSJitInfo* jitInfo = getJitInfo(); |
| 1698 | |
| 1699 | // If we don't know anything about the types of our arguments, we have to |
| 1700 | // assume that type-coercions can have side-effects, so we need to alias |
| 1701 | // everything. |
| 1702 | if (jitInfo->aliasSet() == JSJitInfo::AliasEverything || |
| 1703 | !jitInfo->isTypedMethodJitInfo()) { |
| 1704 | return AliasSet::Store(AliasSet::Any); |
| 1705 | } |
| 1706 | |
| 1707 | uint32_t argIndex = 0; |
| 1708 | const JSTypedMethodJitInfo* methodInfo = |
| 1709 | reinterpret_cast<const JSTypedMethodJitInfo*>(jitInfo); |
| 1710 | for (const JSJitInfo::ArgType* argType = methodInfo->argTypes; |
| 1711 | *argType != JSJitInfo::ArgTypeListEnd; ++argType, ++argIndex) { |
| 1712 | if (argIndex >= numActualArgs()) { |
| 1713 | // Passing through undefined can't have side-effects |
| 1714 | continue; |
| 1715 | } |
| 1716 | // getArg(0) is "this", so skip it |
| 1717 | MDefinition* arg = getArg(argIndex + 1); |
| 1718 | MIRType actualType = arg->type(); |
| 1719 | // The only way to reliably avoid side-effects given the information we |
| 1720 | // have here is if we're passing in a known primitive value to an |
| 1721 | // argument that expects a primitive value. |
| 1722 | // |
| 1723 | // XXXbz maybe we need to communicate better information. For example, |
| 1724 | // a sequence argument will sort of unavoidably have side effects, while |
| 1725 | // a typed array argument won't have any, but both are claimed to be |
| 1726 | // JSJitInfo::Object. But if we do that, we need to watch out for our |
| 1727 | // movability/DCE-ability bits: if we have an arg type that can reliably |
| 1728 | // throw an exception on conversion, that might not affect our alias set |
| 1729 | // per se, but it should prevent us being moved or DCE-ed, unless we |
| 1730 | // know the incoming things match that arg type and won't throw. |
| 1731 | // |
| 1732 | if ((actualType == MIRType::Value || actualType == MIRType::Object) || |
| 1733 | (*argType & JSJitInfo::Object)) { |
| 1734 | return AliasSet::Store(AliasSet::Any); |
| 1735 | } |
| 1736 | } |
| 1737 | |
| 1738 | // We checked all the args, and they check out. So we only alias DOM |
| 1739 | // mutations or alias nothing, depending on the alias set in the jitinfo. |
| 1740 | if (jitInfo->aliasSet() == JSJitInfo::AliasNone) { |
| 1741 | return AliasSet::None(); |
| 1742 | } |
| 1743 | |
| 1744 | MOZ_ASSERT(jitInfo->aliasSet() == JSJitInfo::AliasDOMSets)do { static_assert( mozilla::detail::AssertionConditionType< decltype(jitInfo->aliasSet() == JSJitInfo::AliasDOMSets)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(jitInfo->aliasSet() == JSJitInfo::AliasDOMSets))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("jitInfo->aliasSet() == JSJitInfo::AliasDOMSets" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1744); AnnotateMozCrashReason("MOZ_ASSERT" "(" "jitInfo->aliasSet() == JSJitInfo::AliasDOMSets" ")"); do { *((volatile int*)__null) = 1744; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1745 | return AliasSet::Load(AliasSet::DOMProperty); |
| 1746 | } |
| 1747 | |
| 1748 | void MCallDOMNative::computeMovable() { |
| 1749 | // We are movable if the jitinfo says we can be and if we're also not |
| 1750 | // effectful. The jitinfo can't check for the latter, since it depends on |
| 1751 | // the types of our arguments. |
| 1752 | const JSJitInfo* jitInfo = getJitInfo(); |
| 1753 | |
| 1754 | MOZ_ASSERT_IF(jitInfo->isMovable,do { if (jitInfo->isMovable) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(jitInfo->aliasSet () != JSJitInfo::AliasEverything)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(jitInfo->aliasSet() != JSJitInfo ::AliasEverything))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("jitInfo->aliasSet() != JSJitInfo::AliasEverything", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1755); AnnotateMozCrashReason("MOZ_ASSERT" "(" "jitInfo->aliasSet() != JSJitInfo::AliasEverything" ")"); do { *((volatile int*)__null) = 1755; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
| 1755 | jitInfo->aliasSet() != JSJitInfo::AliasEverything)do { if (jitInfo->isMovable) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(jitInfo->aliasSet () != JSJitInfo::AliasEverything)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(jitInfo->aliasSet() != JSJitInfo ::AliasEverything))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("jitInfo->aliasSet() != JSJitInfo::AliasEverything", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1755); AnnotateMozCrashReason("MOZ_ASSERT" "(" "jitInfo->aliasSet() != JSJitInfo::AliasEverything" ")"); do { *((volatile int*)__null) = 1755; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1756 | |
| 1757 | if (jitInfo->isMovable && !isEffectful()) { |
| 1758 | setMovable(); |
| 1759 | } |
| 1760 | } |
| 1761 | |
| 1762 | bool MCallDOMNative::congruentTo(const MDefinition* ins) const { |
| 1763 | if (!isMovable()) { |
| 1764 | return false; |
| 1765 | } |
| 1766 | |
| 1767 | if (!ins->isCall()) { |
| 1768 | return false; |
| 1769 | } |
| 1770 | |
| 1771 | const MCall* call = ins->toCall(); |
| 1772 | |
| 1773 | if (!call->isCallDOMNative()) { |
| 1774 | return false; |
| 1775 | } |
| 1776 | |
| 1777 | if (getSingleTarget() != call->getSingleTarget()) { |
| 1778 | return false; |
| 1779 | } |
| 1780 | |
| 1781 | if (isConstructing() != call->isConstructing()) { |
| 1782 | return false; |
| 1783 | } |
| 1784 | |
| 1785 | if (numActualArgs() != call->numActualArgs()) { |
| 1786 | return false; |
| 1787 | } |
| 1788 | |
| 1789 | if (!congruentIfOperandsEqual(call)) { |
| 1790 | return false; |
| 1791 | } |
| 1792 | |
| 1793 | // The other call had better be movable at this point! |
| 1794 | MOZ_ASSERT(call->isMovable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(call->isMovable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(call->isMovable()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("call->isMovable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1794); AnnotateMozCrashReason("MOZ_ASSERT" "(" "call->isMovable()" ")"); do { *((volatile int*)__null) = 1794; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1795 | |
| 1796 | return true; |
| 1797 | } |
| 1798 | |
| 1799 | const JSJitInfo* MCallDOMNative::getJitInfo() const { |
| 1800 | MOZ_ASSERT(getSingleTarget()->hasJitInfo())do { static_assert( mozilla::detail::AssertionConditionType< decltype(getSingleTarget()->hasJitInfo())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(getSingleTarget()->hasJitInfo ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("getSingleTarget()->hasJitInfo()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 1800); AnnotateMozCrashReason("MOZ_ASSERT" "(" "getSingleTarget()->hasJitInfo()" ")"); do { *((volatile int*)__null) = 1800; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1801 | return getSingleTarget()->jitInfo(); |
| 1802 | } |
| 1803 | |
| 1804 | MCallClassHook* MCallClassHook::New(TempAllocator& alloc, JSNative target, |
| 1805 | uint32_t argc, bool constructing) { |
| 1806 | auto* ins = new (alloc) MCallClassHook(target, constructing); |
| 1807 | |
| 1808 | // Add callee + |this| + (if constructing) newTarget. |
| 1809 | uint32_t numOperands = 2 + argc + constructing; |
| 1810 | |
| 1811 | if (!ins->init(alloc, numOperands)) { |
| 1812 | return nullptr; |
| 1813 | } |
| 1814 | |
| 1815 | return ins; |
| 1816 | } |
| 1817 | |
| 1818 | MDefinition* MStringLength::foldsTo(TempAllocator& alloc) { |
| 1819 | if (string()->isConstant()) { |
| 1820 | JSString* str = string()->toConstant()->toString(); |
| 1821 | return MConstant::New(alloc, Int32Value(str->length())); |
| 1822 | } |
| 1823 | |
| 1824 | // MFromCharCode returns a one-element string. |
| 1825 | if (string()->isFromCharCode()) { |
| 1826 | return MConstant::New(alloc, Int32Value(1)); |
| 1827 | } |
| 1828 | |
| 1829 | return this; |
| 1830 | } |
| 1831 | |
| 1832 | MDefinition* MConcat::foldsTo(TempAllocator& alloc) { |
| 1833 | if (lhs()->isConstant() && lhs()->toConstant()->toString()->empty()) { |
| 1834 | return rhs(); |
| 1835 | } |
| 1836 | |
| 1837 | if (rhs()->isConstant() && rhs()->toConstant()->toString()->empty()) { |
| 1838 | return lhs(); |
| 1839 | } |
| 1840 | |
| 1841 | return this; |
| 1842 | } |
| 1843 | |
| 1844 | MDefinition* MStringConvertCase::foldsTo(TempAllocator& alloc) { |
| 1845 | MDefinition* string = this->string(); |
| 1846 | |
| 1847 | // Handle the pattern |str[idx].toUpperCase()| and simplify it from |
| 1848 | // |StringConvertCase(FromCharCode(CharCodeAt(str, idx)))| to just |
| 1849 | // |CharCodeConvertCase(CharCodeAt(str, idx))|. |
| 1850 | if (string->isFromCharCode()) { |
| 1851 | auto* charCode = string->toFromCharCode()->code(); |
| 1852 | auto mode = mode_ == Mode::LowerCase ? MCharCodeConvertCase::LowerCase |
| 1853 | : MCharCodeConvertCase::UpperCase; |
| 1854 | return MCharCodeConvertCase::New(alloc, charCode, mode); |
| 1855 | } |
| 1856 | |
| 1857 | // Handle the pattern |num.toString(base).toUpperCase()| and simplify it to |
| 1858 | // directly return the string representation in the correct case. |
| 1859 | if (string->isInt32ToStringWithBase()) { |
| 1860 | auto* toString = string->toInt32ToStringWithBase(); |
| 1861 | |
| 1862 | bool lowerCase = mode_ == Mode::LowerCase; |
| 1863 | if (toString->lowerCase() == lowerCase) { |
| 1864 | return toString; |
| 1865 | } |
| 1866 | return MInt32ToStringWithBase::New(alloc, toString->input(), |
| 1867 | toString->base(), lowerCase); |
| 1868 | } |
| 1869 | |
| 1870 | return this; |
| 1871 | } |
| 1872 | |
| 1873 | static bool IsSubstrTo(MSubstr* substr, int32_t len) { |
| 1874 | // We want to match this pattern: |
| 1875 | // |
| 1876 | // Substr(string, Constant(0), Min(Constant(length), StringLength(string))) |
| 1877 | // |
| 1878 | // which is generated for the self-hosted `String.p.{substring,slice,substr}` |
| 1879 | // functions when called with constants `start` and `end` parameters. |
| 1880 | |
| 1881 | auto isConstantZero = [](auto* def) { |
| 1882 | return def->isConstant() && def->toConstant()->isInt32(0); |
| 1883 | }; |
| 1884 | |
| 1885 | if (!isConstantZero(substr->begin())) { |
| 1886 | return false; |
| 1887 | } |
| 1888 | |
| 1889 | auto* length = substr->length(); |
| 1890 | if (length->isBitOr()) { |
| 1891 | // Unnecessary bit-ops haven't yet been removed. |
| 1892 | auto* bitOr = length->toBitOr(); |
| 1893 | if (isConstantZero(bitOr->lhs())) { |
| 1894 | length = bitOr->rhs(); |
| 1895 | } else if (isConstantZero(bitOr->rhs())) { |
| 1896 | length = bitOr->lhs(); |
| 1897 | } |
| 1898 | } |
| 1899 | if (!length->isMinMax() || length->toMinMax()->isMax()) { |
| 1900 | return false; |
| 1901 | } |
| 1902 | |
| 1903 | auto* min = length->toMinMax(); |
| 1904 | if (!min->lhs()->isConstant() && !min->rhs()->isConstant()) { |
| 1905 | return false; |
| 1906 | } |
| 1907 | |
| 1908 | auto* minConstant = min->lhs()->isConstant() ? min->lhs()->toConstant() |
| 1909 | : min->rhs()->toConstant(); |
| 1910 | |
| 1911 | auto* minOperand = min->lhs()->isConstant() ? min->rhs() : min->lhs(); |
| 1912 | if (!minOperand->isStringLength() || |
| 1913 | minOperand->toStringLength()->string() != substr->string()) { |
| 1914 | return false; |
| 1915 | } |
| 1916 | |
| 1917 | // Ensure |len| matches the substring's length. |
| 1918 | return minConstant->isInt32(len); |
| 1919 | } |
| 1920 | |
| 1921 | MDefinition* MSubstr::foldsTo(TempAllocator& alloc) { |
| 1922 | // Fold |str.substring(0, 1)| to |str.charAt(0)|. |
| 1923 | if (!IsSubstrTo(this, 1)) { |
| 1924 | return this; |
| 1925 | } |
| 1926 | |
| 1927 | auto* charCode = MCharCodeAtOrNegative::New(alloc, string(), begin()); |
| 1928 | block()->insertBefore(this, charCode); |
| 1929 | |
| 1930 | return MFromCharCodeEmptyIfNegative::New(alloc, charCode); |
| 1931 | } |
| 1932 | |
| 1933 | MDefinition* MCharCodeAt::foldsTo(TempAllocator& alloc) { |
| 1934 | MDefinition* string = this->string(); |
| 1935 | if (!string->isConstant() && !string->isFromCharCode()) { |
| 1936 | return this; |
| 1937 | } |
| 1938 | |
| 1939 | MDefinition* index = this->index(); |
| 1940 | if (index->isSpectreMaskIndex()) { |
| 1941 | index = index->toSpectreMaskIndex()->index(); |
| 1942 | } |
| 1943 | if (!index->isConstant()) { |
| 1944 | return this; |
| 1945 | } |
| 1946 | int32_t idx = index->toConstant()->toInt32(); |
| 1947 | |
| 1948 | // Handle the pattern |s[idx].charCodeAt(0)|. |
| 1949 | if (string->isFromCharCode()) { |
| 1950 | if (idx != 0) { |
| 1951 | return this; |
| 1952 | } |
| 1953 | |
| 1954 | // Simplify |CharCodeAt(FromCharCode(CharCodeAt(s, idx)), 0)| to just |
| 1955 | // |CharCodeAt(s, idx)|. |
| 1956 | auto* charCode = string->toFromCharCode()->code(); |
| 1957 | if (!charCode->isCharCodeAt()) { |
| 1958 | return this; |
| 1959 | } |
| 1960 | |
| 1961 | return charCode; |
| 1962 | } |
| 1963 | |
| 1964 | JSLinearString* str = &string->toConstant()->toString()->asLinear(); |
| 1965 | if (idx < 0 || uint32_t(idx) >= str->length()) { |
| 1966 | return this; |
| 1967 | } |
| 1968 | |
| 1969 | char16_t ch = str->latin1OrTwoByteChar(idx); |
| 1970 | return MConstant::New(alloc, Int32Value(ch)); |
| 1971 | } |
| 1972 | |
| 1973 | MDefinition* MCodePointAt::foldsTo(TempAllocator& alloc) { |
| 1974 | MDefinition* string = this->string(); |
| 1975 | if (!string->isConstant() && !string->isFromCharCode()) { |
| 1976 | return this; |
| 1977 | } |
| 1978 | |
| 1979 | MDefinition* index = this->index(); |
| 1980 | if (index->isSpectreMaskIndex()) { |
| 1981 | index = index->toSpectreMaskIndex()->index(); |
| 1982 | } |
| 1983 | if (!index->isConstant()) { |
| 1984 | return this; |
| 1985 | } |
| 1986 | int32_t idx = index->toConstant()->toInt32(); |
| 1987 | |
| 1988 | // Handle the pattern |s[idx].codePointAt(0)|. |
| 1989 | if (string->isFromCharCode()) { |
| 1990 | if (idx != 0) { |
| 1991 | return this; |
| 1992 | } |
| 1993 | |
| 1994 | // Simplify |CodePointAt(FromCharCode(CharCodeAt(s, idx)), 0)| to just |
| 1995 | // |CharCodeAt(s, idx)|. |
| 1996 | auto* charCode = string->toFromCharCode()->code(); |
| 1997 | if (!charCode->isCharCodeAt()) { |
| 1998 | return this; |
| 1999 | } |
| 2000 | |
| 2001 | return charCode; |
| 2002 | } |
| 2003 | |
| 2004 | JSLinearString* str = &string->toConstant()->toString()->asLinear(); |
| 2005 | if (idx < 0 || uint32_t(idx) >= str->length()) { |
| 2006 | return this; |
| 2007 | } |
| 2008 | |
| 2009 | char32_t first = str->latin1OrTwoByteChar(idx); |
| 2010 | if (unicode::IsLeadSurrogate(first) && uint32_t(idx) + 1 < str->length()) { |
| 2011 | char32_t second = str->latin1OrTwoByteChar(idx + 1); |
| 2012 | if (unicode::IsTrailSurrogate(second)) { |
| 2013 | first = unicode::UTF16Decode(first, second); |
| 2014 | } |
| 2015 | } |
| 2016 | return MConstant::New(alloc, Int32Value(first)); |
| 2017 | } |
| 2018 | |
| 2019 | MDefinition* MToRelativeStringIndex::foldsTo(TempAllocator& alloc) { |
| 2020 | MDefinition* index = this->index(); |
| 2021 | MDefinition* length = this->length(); |
| 2022 | |
| 2023 | if (!index->isConstant()) { |
| 2024 | return this; |
| 2025 | } |
| 2026 | if (!length->isStringLength() && !length->isConstant()) { |
| 2027 | return this; |
| 2028 | } |
| 2029 | MOZ_ASSERT_IF(length->isConstant(), length->toConstant()->toInt32() >= 0)do { if (length->isConstant()) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(length->toConstant ()->toInt32() >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(length->toConstant()-> toInt32() >= 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("length->toConstant()->toInt32() >= 0", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2029); AnnotateMozCrashReason("MOZ_ASSERT" "(" "length->toConstant()->toInt32() >= 0" ")"); do { *((volatile int*)__null) = 2029; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 2030 | |
| 2031 | int32_t relativeIndex = index->toConstant()->toInt32(); |
| 2032 | if (relativeIndex >= 0) { |
| 2033 | return index; |
| 2034 | } |
| 2035 | |
| 2036 | // Safe to truncate because |length| is never negative. |
| 2037 | return MAdd::New(alloc, index, length, TruncateKind::Truncate); |
| 2038 | } |
| 2039 | |
| 2040 | template <size_t Arity> |
| 2041 | [[nodiscard]] static bool EnsureFloatInputOrConvert( |
| 2042 | MAryInstruction<Arity>* owner, TempAllocator& alloc) { |
| 2043 | MOZ_ASSERT(!IsFloatingPointType(owner->type()),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsFloatingPointType(owner->type()))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!IsFloatingPointType(owner->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!IsFloatingPointType(owner->type())" " (" "Floating point types must check consumers" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2044); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsFloatingPointType(owner->type())" ") (" "Floating point types must check consumers" ")"); do { *((volatile int*)__null) = 2044; __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
| 2044 | "Floating point types must check consumers")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsFloatingPointType(owner->type()))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!IsFloatingPointType(owner->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!IsFloatingPointType(owner->type())" " (" "Floating point types must check consumers" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2044); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsFloatingPointType(owner->type())" ") (" "Floating point types must check consumers" ")"); do { *((volatile int*)__null) = 2044; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 2045 | |
| 2046 | if (AllOperandsCanProduceFloat32(owner)) { |
| 2047 | return true; |
| 2048 | } |
| 2049 | ConvertOperandsToDouble(owner, alloc); |
| 2050 | return false; |
| 2051 | } |
| 2052 | |
| 2053 | template <size_t Arity> |
| 2054 | [[nodiscard]] static bool EnsureFloatConsumersAndInputOrConvert( |
| 2055 | MAryInstruction<Arity>* owner, TempAllocator& alloc) { |
| 2056 | MOZ_ASSERT(IsFloatingPointType(owner->type()),do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsFloatingPointType(owner->type()))>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(IsFloatingPointType(owner->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsFloatingPointType(owner->type())" " (" "Integer types don't need to check consumers" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2057); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsFloatingPointType(owner->type())" ") (" "Integer types don't need to check consumers" ")"); do { *((volatile int*)__null) = 2057; __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
| 2057 | "Integer types don't need to check consumers")do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsFloatingPointType(owner->type()))>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(IsFloatingPointType(owner->type())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsFloatingPointType(owner->type())" " (" "Integer types don't need to check consumers" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2057); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsFloatingPointType(owner->type())" ") (" "Integer types don't need to check consumers" ")"); do { *((volatile int*)__null) = 2057; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 2058 | |
| 2059 | if (AllOperandsCanProduceFloat32(owner) && |
| 2060 | CheckUsesAreFloat32Consumers(owner)) { |
| 2061 | return true; |
| 2062 | } |
| 2063 | ConvertOperandsToDouble(owner, alloc); |
| 2064 | return false; |
| 2065 | } |
| 2066 | |
| 2067 | void MFloor::trySpecializeFloat32(TempAllocator& alloc) { |
| 2068 | MOZ_ASSERT(type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2068); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2068; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2069 | if (EnsureFloatInputOrConvert(this, alloc)) { |
| 2070 | specialization_ = MIRType::Float32; |
| 2071 | } |
| 2072 | } |
| 2073 | |
| 2074 | void MCeil::trySpecializeFloat32(TempAllocator& alloc) { |
| 2075 | MOZ_ASSERT(type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2075); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2075; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2076 | if (EnsureFloatInputOrConvert(this, alloc)) { |
| 2077 | specialization_ = MIRType::Float32; |
| 2078 | } |
| 2079 | } |
| 2080 | |
| 2081 | void MRound::trySpecializeFloat32(TempAllocator& alloc) { |
| 2082 | MOZ_ASSERT(type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2082); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2082; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2083 | if (EnsureFloatInputOrConvert(this, alloc)) { |
| 2084 | specialization_ = MIRType::Float32; |
| 2085 | } |
| 2086 | } |
| 2087 | |
| 2088 | void MTrunc::trySpecializeFloat32(TempAllocator& alloc) { |
| 2089 | MOZ_ASSERT(type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2089); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2089; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2090 | if (EnsureFloatInputOrConvert(this, alloc)) { |
| 2091 | specialization_ = MIRType::Float32; |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | void MNearbyInt::trySpecializeFloat32(TempAllocator& alloc) { |
| 2096 | if (EnsureFloatConsumersAndInputOrConvert(this, alloc)) { |
| 2097 | specialization_ = MIRType::Float32; |
| 2098 | setResultType(MIRType::Float32); |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | MGoto* MGoto::New(TempAllocator& alloc, MBasicBlock* target) { |
| 2103 | return new (alloc) MGoto(target); |
| 2104 | } |
| 2105 | |
| 2106 | MGoto* MGoto::New(TempAllocator::Fallible alloc, MBasicBlock* target) { |
| 2107 | MOZ_ASSERT(target)do { static_assert( mozilla::detail::AssertionConditionType< decltype(target)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(target))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("target", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2107); AnnotateMozCrashReason("MOZ_ASSERT" "(" "target" ")" ); do { *((volatile int*)__null) = 2107; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2108 | return new (alloc) MGoto(target); |
| 2109 | } |
| 2110 | |
| 2111 | MGoto* MGoto::New(TempAllocator& alloc) { return new (alloc) MGoto(nullptr); } |
| 2112 | |
| 2113 | MDefinition* MBox::foldsTo(TempAllocator& alloc) { |
| 2114 | if (input()->isUnbox()) { |
| 2115 | return input()->toUnbox()->input(); |
| 2116 | } |
| 2117 | return this; |
| 2118 | } |
| 2119 | |
| 2120 | #ifdef JS_JITSPEW1 |
| 2121 | void MUnbox::printOpcode(GenericPrinter& out) const { |
| 2122 | PrintOpcodeName(out, op()); |
| 2123 | out.printf(" "); |
| 2124 | getOperand(0)->printName(out); |
| 2125 | out.printf(" "); |
| 2126 | |
| 2127 | switch (type()) { |
| 2128 | case MIRType::Int32: |
| 2129 | out.printf("to Int32"); |
| 2130 | break; |
| 2131 | case MIRType::Double: |
| 2132 | out.printf("to Double"); |
| 2133 | break; |
| 2134 | case MIRType::Boolean: |
| 2135 | out.printf("to Boolean"); |
| 2136 | break; |
| 2137 | case MIRType::String: |
| 2138 | out.printf("to String"); |
| 2139 | break; |
| 2140 | case MIRType::Symbol: |
| 2141 | out.printf("to Symbol"); |
| 2142 | break; |
| 2143 | case MIRType::BigInt: |
| 2144 | out.printf("to BigInt"); |
| 2145 | break; |
| 2146 | case MIRType::Object: |
| 2147 | out.printf("to Object"); |
| 2148 | break; |
| 2149 | default: |
| 2150 | break; |
| 2151 | } |
| 2152 | |
| 2153 | switch (mode()) { |
| 2154 | case Fallible: |
| 2155 | out.printf(" (fallible)"); |
| 2156 | break; |
| 2157 | case Infallible: |
| 2158 | out.printf(" (infallible)"); |
| 2159 | break; |
| 2160 | default: |
| 2161 | break; |
| 2162 | } |
| 2163 | } |
| 2164 | #endif |
| 2165 | |
| 2166 | MDefinition* MUnbox::foldsTo(TempAllocator& alloc) { |
| 2167 | if (input()->isBox()) { |
| 2168 | MDefinition* unboxed = input()->toBox()->input(); |
| 2169 | |
| 2170 | // Fold MUnbox(MBox(x)) => x if types match. |
| 2171 | if (unboxed->type() == type()) { |
| 2172 | if (fallible()) { |
| 2173 | unboxed->setImplicitlyUsedUnchecked(); |
| 2174 | } |
| 2175 | return unboxed; |
| 2176 | } |
| 2177 | |
| 2178 | // Fold MUnbox(MBox(x)) => MToDouble(x) if possible. |
| 2179 | if (type() == MIRType::Double && |
| 2180 | IsTypeRepresentableAsDouble(unboxed->type())) { |
| 2181 | if (unboxed->isConstant()) { |
| 2182 | return MConstant::New( |
| 2183 | alloc, DoubleValue(unboxed->toConstant()->numberToDouble())); |
| 2184 | } |
| 2185 | |
| 2186 | return MToDouble::New(alloc, unboxed); |
| 2187 | } |
| 2188 | |
| 2189 | // MUnbox<Int32>(MBox<Double>(x)) will always fail, even if x can be |
| 2190 | // represented as an Int32. Fold to avoid unnecessary bailouts. |
| 2191 | if (type() == MIRType::Int32 && unboxed->type() == MIRType::Double) { |
| 2192 | auto* folded = MToNumberInt32::New(alloc, unboxed, |
| 2193 | IntConversionInputKind::NumbersOnly); |
| 2194 | folded->setGuard(); |
| 2195 | return folded; |
| 2196 | } |
| 2197 | } |
| 2198 | |
| 2199 | return this; |
| 2200 | } |
| 2201 | |
| 2202 | #ifdef DEBUG1 |
| 2203 | void MPhi::assertLoopPhi() const { |
| 2204 | // getLoopPredecessorOperand and getLoopBackedgeOperand rely on these |
| 2205 | // predecessors being at known indices. |
| 2206 | if (block()->numPredecessors() == 2) { |
| 2207 | MBasicBlock* pred = block()->getPredecessor(0); |
| 2208 | MBasicBlock* back = block()->getPredecessor(1); |
| 2209 | MOZ_ASSERT(pred == block()->loopPredecessor())do { static_assert( mozilla::detail::AssertionConditionType< decltype(pred == block()->loopPredecessor())>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(pred == block()->loopPredecessor()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pred == block()->loopPredecessor()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2209); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pred == block()->loopPredecessor()" ")"); do { *((volatile int*)__null) = 2209; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2210 | MOZ_ASSERT(pred->successorWithPhis() == block())do { static_assert( mozilla::detail::AssertionConditionType< decltype(pred->successorWithPhis() == block())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pred->successorWithPhis() == block()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pred->successorWithPhis() == block()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2210); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pred->successorWithPhis() == block()" ")"); do { *((volatile int*)__null) = 2210; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2211 | MOZ_ASSERT(pred->positionInPhiSuccessor() == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(pred->positionInPhiSuccessor() == 0)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pred->positionInPhiSuccessor() == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pred->positionInPhiSuccessor() == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2211); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pred->positionInPhiSuccessor() == 0" ")"); do { *((volatile int*)__null) = 2211; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2212 | MOZ_ASSERT(back == block()->backedge())do { static_assert( mozilla::detail::AssertionConditionType< decltype(back == block()->backedge())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(back == block()->backedge ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("back == block()->backedge()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2212); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back == block()->backedge()" ")"); do { *((volatile int*)__null) = 2212; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2213 | MOZ_ASSERT(back->successorWithPhis() == block())do { static_assert( mozilla::detail::AssertionConditionType< decltype(back->successorWithPhis() == block())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(back->successorWithPhis() == block()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("back->successorWithPhis() == block()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2213); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back->successorWithPhis() == block()" ")"); do { *((volatile int*)__null) = 2213; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2214 | MOZ_ASSERT(back->positionInPhiSuccessor() == 1)do { static_assert( mozilla::detail::AssertionConditionType< decltype(back->positionInPhiSuccessor() == 1)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(back->positionInPhiSuccessor() == 1))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("back->positionInPhiSuccessor() == 1" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2214); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back->positionInPhiSuccessor() == 1" ")"); do { *((volatile int*)__null) = 2214; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2215 | } else { |
| 2216 | // After we remove fake loop predecessors for loop headers that |
| 2217 | // are only reachable via OSR, the only predecessor is the |
| 2218 | // loop backedge. |
| 2219 | MOZ_ASSERT(block()->numPredecessors() == 1)do { static_assert( mozilla::detail::AssertionConditionType< decltype(block()->numPredecessors() == 1)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(block()->numPredecessors( ) == 1))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("block()->numPredecessors() == 1", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2219); AnnotateMozCrashReason("MOZ_ASSERT" "(" "block()->numPredecessors() == 1" ")"); do { *((volatile int*)__null) = 2219; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2220 | MOZ_ASSERT(block()->graph().osrBlock())do { static_assert( mozilla::detail::AssertionConditionType< decltype(block()->graph().osrBlock())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(block()->graph().osrBlock ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("block()->graph().osrBlock()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2220); AnnotateMozCrashReason("MOZ_ASSERT" "(" "block()->graph().osrBlock()" ")"); do { *((volatile int*)__null) = 2220; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2221 | MOZ_ASSERT(!block()->graph().canBuildDominators())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!block()->graph().canBuildDominators())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!block()->graph().canBuildDominators()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!block()->graph().canBuildDominators()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2221); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!block()->graph().canBuildDominators()" ")"); do { *((volatile int*)__null) = 2221; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2222 | MBasicBlock* back = block()->getPredecessor(0); |
| 2223 | MOZ_ASSERT(back == block()->backedge())do { static_assert( mozilla::detail::AssertionConditionType< decltype(back == block()->backedge())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(back == block()->backedge ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("back == block()->backedge()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2223); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back == block()->backedge()" ")"); do { *((volatile int*)__null) = 2223; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2224 | MOZ_ASSERT(back->successorWithPhis() == block())do { static_assert( mozilla::detail::AssertionConditionType< decltype(back->successorWithPhis() == block())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(back->successorWithPhis() == block()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("back->successorWithPhis() == block()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2224); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back->successorWithPhis() == block()" ")"); do { *((volatile int*)__null) = 2224; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2225 | MOZ_ASSERT(back->positionInPhiSuccessor() == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(back->positionInPhiSuccessor() == 0)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(back->positionInPhiSuccessor() == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("back->positionInPhiSuccessor() == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2225); AnnotateMozCrashReason("MOZ_ASSERT" "(" "back->positionInPhiSuccessor() == 0" ")"); do { *((volatile int*)__null) = 2225; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2226 | } |
| 2227 | } |
| 2228 | #endif |
| 2229 | |
| 2230 | MDefinition* MPhi::getLoopPredecessorOperand() const { |
| 2231 | // This should not be called after removing fake loop predecessors. |
| 2232 | MOZ_ASSERT(block()->numPredecessors() == 2)do { static_assert( mozilla::detail::AssertionConditionType< decltype(block()->numPredecessors() == 2)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(block()->numPredecessors( ) == 2))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("block()->numPredecessors() == 2", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2232); AnnotateMozCrashReason("MOZ_ASSERT" "(" "block()->numPredecessors() == 2" ")"); do { *((volatile int*)__null) = 2232; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2233 | assertLoopPhi(); |
| 2234 | return getOperand(0); |
| 2235 | } |
| 2236 | |
| 2237 | MDefinition* MPhi::getLoopBackedgeOperand() const { |
| 2238 | assertLoopPhi(); |
| 2239 | uint32_t idx = block()->numPredecessors() == 2 ? 1 : 0; |
| 2240 | return getOperand(idx); |
| 2241 | } |
| 2242 | |
| 2243 | void MPhi::removeOperand(size_t index) { |
| 2244 | MOZ_ASSERT(index < numOperands())do { static_assert( mozilla::detail::AssertionConditionType< decltype(index < numOperands())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(index < numOperands()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("index < numOperands()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2244); AnnotateMozCrashReason("MOZ_ASSERT" "(" "index < numOperands()" ")"); do { *((volatile int*)__null) = 2244; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2245 | MOZ_ASSERT(getUseFor(index)->index() == index)do { static_assert( mozilla::detail::AssertionConditionType< decltype(getUseFor(index)->index() == index)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(getUseFor(index)->index() == index))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("getUseFor(index)->index() == index" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2245); AnnotateMozCrashReason("MOZ_ASSERT" "(" "getUseFor(index)->index() == index" ")"); do { *((volatile int*)__null) = 2245; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2246 | MOZ_ASSERT(getUseFor(index)->consumer() == this)do { static_assert( mozilla::detail::AssertionConditionType< decltype(getUseFor(index)->consumer() == this)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(getUseFor(index)->consumer() == this))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("getUseFor(index)->consumer() == this" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2246); AnnotateMozCrashReason("MOZ_ASSERT" "(" "getUseFor(index)->consumer() == this" ")"); do { *((volatile int*)__null) = 2246; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2247 | |
| 2248 | // If we have phi(..., a, b, c, d, ..., z) and we plan |
| 2249 | // on removing a, then first shift downward so that we have |
| 2250 | // phi(..., b, c, d, ..., z, z): |
| 2251 | MUse* p = inputs_.begin() + index; |
| 2252 | MUse* e = inputs_.end(); |
| 2253 | p->producer()->removeUse(p); |
| 2254 | for (; p < e - 1; ++p) { |
| 2255 | MDefinition* producer = (p + 1)->producer(); |
| 2256 | p->setProducerUnchecked(producer); |
| 2257 | producer->replaceUse(p + 1, p); |
| 2258 | } |
| 2259 | |
| 2260 | // truncate the inputs_ list: |
| 2261 | inputs_.popBack(); |
| 2262 | } |
| 2263 | |
| 2264 | void MPhi::removeAllOperands() { |
| 2265 | for (MUse& p : inputs_) { |
| 2266 | p.producer()->removeUse(&p); |
| 2267 | } |
| 2268 | inputs_.clear(); |
| 2269 | } |
| 2270 | |
| 2271 | MDefinition* MPhi::foldsTernary(TempAllocator& alloc) { |
| 2272 | /* Look if this MPhi is a ternary construct. |
| 2273 | * This is a very loose term as it actually only checks for |
| 2274 | * |
| 2275 | * MTest X |
| 2276 | * / \ |
| 2277 | * ... ... |
| 2278 | * \ / |
| 2279 | * MPhi X Y |
| 2280 | * |
| 2281 | * Which we will simply call: |
| 2282 | * x ? x : y or x ? y : x |
| 2283 | */ |
| 2284 | |
| 2285 | if (numOperands() != 2) { |
| 2286 | return nullptr; |
| 2287 | } |
| 2288 | |
| 2289 | MOZ_ASSERT(block()->numPredecessors() == 2)do { static_assert( mozilla::detail::AssertionConditionType< decltype(block()->numPredecessors() == 2)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(block()->numPredecessors( ) == 2))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("block()->numPredecessors() == 2", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2289); AnnotateMozCrashReason("MOZ_ASSERT" "(" "block()->numPredecessors() == 2" ")"); do { *((volatile int*)__null) = 2289; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2290 | |
| 2291 | MBasicBlock* pred = block()->immediateDominator(); |
| 2292 | if (!pred || !pred->lastIns()->isTest()) { |
| 2293 | return nullptr; |
| 2294 | } |
| 2295 | |
| 2296 | MTest* test = pred->lastIns()->toTest(); |
| 2297 | |
| 2298 | // True branch may only dominate one edge of MPhi. |
| 2299 | if (test->ifTrue()->dominates(block()->getPredecessor(0)) == |
| 2300 | test->ifTrue()->dominates(block()->getPredecessor(1))) { |
| 2301 | return nullptr; |
| 2302 | } |
| 2303 | |
| 2304 | // False branch may only dominate one edge of MPhi. |
| 2305 | if (test->ifFalse()->dominates(block()->getPredecessor(0)) == |
| 2306 | test->ifFalse()->dominates(block()->getPredecessor(1))) { |
| 2307 | return nullptr; |
| 2308 | } |
| 2309 | |
| 2310 | // True and false branch must dominate different edges of MPhi. |
| 2311 | if (test->ifTrue()->dominates(block()->getPredecessor(0)) == |
| 2312 | test->ifFalse()->dominates(block()->getPredecessor(0))) { |
| 2313 | return nullptr; |
| 2314 | } |
| 2315 | |
| 2316 | // We found a ternary construct. |
| 2317 | bool firstIsTrueBranch = |
| 2318 | test->ifTrue()->dominates(block()->getPredecessor(0)); |
| 2319 | MDefinition* trueDef = firstIsTrueBranch ? getOperand(0) : getOperand(1); |
| 2320 | MDefinition* falseDef = firstIsTrueBranch ? getOperand(1) : getOperand(0); |
| 2321 | |
| 2322 | // Accept either |
| 2323 | // testArg ? testArg : constant or |
| 2324 | // testArg ? constant : testArg |
| 2325 | if (!trueDef->isConstant() && !falseDef->isConstant()) { |
| 2326 | return nullptr; |
| 2327 | } |
| 2328 | |
| 2329 | MConstant* c = |
| 2330 | trueDef->isConstant() ? trueDef->toConstant() : falseDef->toConstant(); |
| 2331 | MDefinition* testArg = (trueDef == c) ? falseDef : trueDef; |
| 2332 | if (testArg != test->input()) { |
| 2333 | return nullptr; |
| 2334 | } |
| 2335 | |
| 2336 | // This check should be a tautology, except that the constant might be the |
| 2337 | // result of the removal of a branch. In such case the domination scope of |
| 2338 | // the block which is holding the constant might be incomplete. This |
| 2339 | // condition is used to prevent doing this optimization based on incomplete |
| 2340 | // information. |
| 2341 | // |
| 2342 | // As GVN removed a branch, it will update the dominations rules before |
| 2343 | // trying to fold this MPhi again. Thus, this condition does not inhibit |
| 2344 | // this optimization. |
| 2345 | MBasicBlock* truePred = block()->getPredecessor(firstIsTrueBranch ? 0 : 1); |
| 2346 | MBasicBlock* falsePred = block()->getPredecessor(firstIsTrueBranch ? 1 : 0); |
| 2347 | if (!trueDef->block()->dominates(truePred) || |
| 2348 | !falseDef->block()->dominates(falsePred)) { |
| 2349 | return nullptr; |
| 2350 | } |
| 2351 | |
| 2352 | // If testArg is an int32 type we can: |
| 2353 | // - fold testArg ? testArg : 0 to testArg |
| 2354 | // - fold testArg ? 0 : testArg to 0 |
| 2355 | if (testArg->type() == MIRType::Int32 && c->numberToDouble() == 0) { |
| 2356 | testArg->setGuardRangeBailoutsUnchecked(); |
| 2357 | |
| 2358 | // When folding to the constant we need to hoist it. |
| 2359 | if (trueDef == c && !c->block()->dominates(block())) { |
| 2360 | c->block()->moveBefore(pred->lastIns(), c); |
| 2361 | } |
| 2362 | return trueDef; |
| 2363 | } |
| 2364 | |
| 2365 | // If testArg is an double type we can: |
| 2366 | // - fold testArg ? testArg : 0.0 to MNaNToZero(testArg) |
| 2367 | if (testArg->type() == MIRType::Double && |
| 2368 | mozilla::IsPositiveZero(c->numberToDouble()) && c != trueDef) { |
| 2369 | MNaNToZero* replace = MNaNToZero::New(alloc, testArg); |
| 2370 | test->block()->insertBefore(test, replace); |
| 2371 | return replace; |
| 2372 | } |
| 2373 | |
| 2374 | // If testArg is a string type we can: |
| 2375 | // - fold testArg ? testArg : "" to testArg |
| 2376 | // - fold testArg ? "" : testArg to "" |
| 2377 | if (testArg->type() == MIRType::String && |
| 2378 | c->toString() == GetJitContext()->runtime->emptyString()) { |
| 2379 | // When folding to the constant we need to hoist it. |
| 2380 | if (trueDef == c && !c->block()->dominates(block())) { |
| 2381 | c->block()->moveBefore(pred->lastIns(), c); |
| 2382 | } |
| 2383 | return trueDef; |
| 2384 | } |
| 2385 | |
| 2386 | return nullptr; |
| 2387 | } |
| 2388 | |
| 2389 | MDefinition* MPhi::operandIfRedundant() { |
| 2390 | if (inputs_.length() == 0) { |
| 2391 | return nullptr; |
| 2392 | } |
| 2393 | |
| 2394 | // If this phi is redundant (e.g., phi(a,a) or b=phi(a,this)), |
| 2395 | // returns the operand that it will always be equal to (a, in |
| 2396 | // those two cases). |
| 2397 | MDefinition* first = getOperand(0); |
| 2398 | for (size_t i = 1, e = numOperands(); i < e; i++) { |
| 2399 | MDefinition* op = getOperand(i); |
| 2400 | if (op != first && op != this) { |
| 2401 | return nullptr; |
| 2402 | } |
| 2403 | } |
| 2404 | return first; |
| 2405 | } |
| 2406 | |
| 2407 | MDefinition* MPhi::foldsTo(TempAllocator& alloc) { |
| 2408 | if (MDefinition* def = operandIfRedundant()) { |
| 2409 | return def; |
| 2410 | } |
| 2411 | |
| 2412 | if (MDefinition* def = foldsTernary(alloc)) { |
| 2413 | return def; |
| 2414 | } |
| 2415 | |
| 2416 | return this; |
| 2417 | } |
| 2418 | |
| 2419 | bool MPhi::congruentTo(const MDefinition* ins) const { |
| 2420 | if (!ins->isPhi()) { |
| 2421 | return false; |
| 2422 | } |
| 2423 | |
| 2424 | // Phis in different blocks may have different control conditions. |
| 2425 | // For example, these phis: |
| 2426 | // |
| 2427 | // if (p) |
| 2428 | // goto a |
| 2429 | // a: |
| 2430 | // t = phi(x, y) |
| 2431 | // |
| 2432 | // if (q) |
| 2433 | // goto b |
| 2434 | // b: |
| 2435 | // s = phi(x, y) |
| 2436 | // |
| 2437 | // have identical operands, but they are not equvalent because t is |
| 2438 | // effectively p?x:y and s is effectively q?x:y. |
| 2439 | // |
| 2440 | // For now, consider phis in different blocks incongruent. |
| 2441 | if (ins->block() != block()) { |
| 2442 | return false; |
| 2443 | } |
| 2444 | |
| 2445 | return congruentIfOperandsEqual(ins); |
| 2446 | } |
| 2447 | |
| 2448 | void MPhi::updateForReplacement(MPhi* other) { |
| 2449 | // This function is called to fix the current Phi flags using it as a |
| 2450 | // replacement of the other Phi instruction |other|. |
| 2451 | // |
| 2452 | // When dealing with usage analysis, any Use will replace all other values, |
| 2453 | // such as Unused and Unknown. Unless both are Unused, the merge would be |
| 2454 | // Unknown. |
| 2455 | if (usageAnalysis_ == PhiUsage::Used || |
| 2456 | other->usageAnalysis_ == PhiUsage::Used) { |
| 2457 | usageAnalysis_ = PhiUsage::Used; |
| 2458 | } else if (usageAnalysis_ != other->usageAnalysis_) { |
| 2459 | // this == unused && other == unknown |
| 2460 | // or this == unknown && other == unused |
| 2461 | usageAnalysis_ = PhiUsage::Unknown; |
| 2462 | } else { |
| 2463 | // this == unused && other == unused |
| 2464 | // or this == unknown && other = unknown |
| 2465 | MOZ_ASSERT(usageAnalysis_ == PhiUsage::Unused ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(usageAnalysis_ == PhiUsage:: Unused || usageAnalysis_ == PhiUsage::Unknown))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2466); AnnotateMozCrashReason("MOZ_ASSERT" "(" "usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown" ")"); do { *((volatile int*)__null) = 2466; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 2466 | usageAnalysis_ == PhiUsage::Unknown)do { static_assert( mozilla::detail::AssertionConditionType< decltype(usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(usageAnalysis_ == PhiUsage:: Unused || usageAnalysis_ == PhiUsage::Unknown))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2466); AnnotateMozCrashReason("MOZ_ASSERT" "(" "usageAnalysis_ == PhiUsage::Unused || usageAnalysis_ == PhiUsage::Unknown" ")"); do { *((volatile int*)__null) = 2466; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2467 | MOZ_ASSERT(usageAnalysis_ == other->usageAnalysis_)do { static_assert( mozilla::detail::AssertionConditionType< decltype(usageAnalysis_ == other->usageAnalysis_)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(usageAnalysis_ == other->usageAnalysis_))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("usageAnalysis_ == other->usageAnalysis_" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2467); AnnotateMozCrashReason("MOZ_ASSERT" "(" "usageAnalysis_ == other->usageAnalysis_" ")"); do { *((volatile int*)__null) = 2467; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2468 | } |
| 2469 | } |
| 2470 | |
| 2471 | /* static */ |
| 2472 | bool MPhi::markIteratorPhis(const PhiVector& iterators) { |
| 2473 | // Find and mark phis that must transitively hold an iterator live. |
| 2474 | |
| 2475 | Vector<MPhi*, 8, SystemAllocPolicy> worklist; |
| 2476 | |
| 2477 | for (MPhi* iter : iterators) { |
| 2478 | if (!iter->isInWorklist()) { |
| 2479 | if (!worklist.append(iter)) { |
| 2480 | return false; |
| 2481 | } |
| 2482 | iter->setInWorklist(); |
| 2483 | } |
| 2484 | } |
| 2485 | |
| 2486 | while (!worklist.empty()) { |
| 2487 | MPhi* phi = worklist.popCopy(); |
| 2488 | phi->setNotInWorklist(); |
| 2489 | |
| 2490 | phi->setIterator(); |
| 2491 | phi->setImplicitlyUsedUnchecked(); |
| 2492 | |
| 2493 | for (MUseDefIterator iter(phi); iter; iter++) { |
| 2494 | MDefinition* use = iter.def(); |
| 2495 | if (!use->isInWorklist() && use->isPhi() && !use->toPhi()->isIterator()) { |
| 2496 | if (!worklist.append(use->toPhi())) { |
| 2497 | return false; |
| 2498 | } |
| 2499 | use->setInWorklist(); |
| 2500 | } |
| 2501 | } |
| 2502 | } |
| 2503 | |
| 2504 | return true; |
| 2505 | } |
| 2506 | |
| 2507 | bool MPhi::typeIncludes(MDefinition* def) { |
| 2508 | MOZ_ASSERT(!IsMagicType(def->type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsMagicType(def->type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsMagicType(def->type()) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!IsMagicType(def->type())", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2508); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsMagicType(def->type())" ")"); do { *((volatile int*)__null) = 2508; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2509 | |
| 2510 | if (def->type() == MIRType::Int32 && this->type() == MIRType::Double) { |
| 2511 | return true; |
| 2512 | } |
| 2513 | |
| 2514 | if (def->type() == MIRType::Value) { |
| 2515 | // This phi must be able to be any value. |
| 2516 | return this->type() == MIRType::Value; |
| 2517 | } |
| 2518 | |
| 2519 | return this->mightBeType(def->type()); |
| 2520 | } |
| 2521 | |
| 2522 | void MCallBase::addArg(size_t argnum, MDefinition* arg) { |
| 2523 | // The operand vector is initialized in reverse order by WarpBuilder. |
| 2524 | // It cannot be checked for consistency until all arguments are added. |
| 2525 | // FixedList doesn't initialize its elements, so do an unchecked init. |
| 2526 | initOperand(argnum + NumNonArgumentOperands, arg); |
| 2527 | } |
| 2528 | |
| 2529 | static inline bool IsConstant(MDefinition* def, double v) { |
| 2530 | if (!def->isConstant()) { |
| 2531 | return false; |
| 2532 | } |
| 2533 | |
| 2534 | return NumbersAreIdentical(def->toConstant()->numberToDouble(), v); |
| 2535 | } |
| 2536 | |
| 2537 | MDefinition* MBinaryBitwiseInstruction::foldsTo(TempAllocator& alloc) { |
| 2538 | // Identity operations are removed (for int32 only) in foldUnnecessaryBitop. |
| 2539 | |
| 2540 | if (type() == MIRType::Int32) { |
| 2541 | if (MDefinition* folded = EvaluateConstantOperands(alloc, this)) { |
| 2542 | return folded; |
| 2543 | } |
| 2544 | } else if (type() == MIRType::Int64) { |
| 2545 | if (MDefinition* folded = EvaluateInt64ConstantOperands(alloc, this)) { |
| 2546 | return folded; |
| 2547 | } |
| 2548 | } |
| 2549 | |
| 2550 | return this; |
| 2551 | } |
| 2552 | |
| 2553 | MDefinition* MBinaryBitwiseInstruction::foldUnnecessaryBitop() { |
| 2554 | // It's probably OK to perform this optimization only for int32, as it will |
| 2555 | // have the greatest effect for asm.js code that is compiled with the JS |
| 2556 | // pipeline, and that code will not see int64 values. |
| 2557 | |
| 2558 | if (type() != MIRType::Int32) { |
| 2559 | return this; |
| 2560 | } |
| 2561 | |
| 2562 | // Fold unsigned shift right operator when the second operand is zero and |
| 2563 | // the only use is an unsigned modulo. Thus, the expression |
| 2564 | // |(x >>> 0) % y| becomes |x % y|. |
| 2565 | if (isUrsh() && IsUint32Type(this)) { |
| 2566 | MDefinition* defUse = maybeSingleDefUse(); |
| 2567 | if (defUse && defUse->isMod() && defUse->toMod()->isUnsigned()) { |
| 2568 | return getOperand(0); |
| 2569 | } |
| 2570 | } |
| 2571 | |
| 2572 | // Eliminate bitwise operations that are no-ops when used on integer |
| 2573 | // inputs, such as (x | 0). |
| 2574 | |
| 2575 | MDefinition* lhs = getOperand(0); |
| 2576 | MDefinition* rhs = getOperand(1); |
| 2577 | |
| 2578 | if (IsConstant(lhs, 0)) { |
| 2579 | return foldIfZero(0); |
| 2580 | } |
| 2581 | |
| 2582 | if (IsConstant(rhs, 0)) { |
| 2583 | return foldIfZero(1); |
| 2584 | } |
| 2585 | |
| 2586 | if (IsConstant(lhs, -1)) { |
| 2587 | return foldIfNegOne(0); |
| 2588 | } |
| 2589 | |
| 2590 | if (IsConstant(rhs, -1)) { |
| 2591 | return foldIfNegOne(1); |
| 2592 | } |
| 2593 | |
| 2594 | if (lhs == rhs) { |
| 2595 | return foldIfEqual(); |
| 2596 | } |
| 2597 | |
| 2598 | if (maskMatchesRightRange) { |
| 2599 | MOZ_ASSERT(lhs->isConstant())do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->isConstant())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs->isConstant()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("lhs->isConstant()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2599); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->isConstant()" ")"); do { *((volatile int*)__null) = 2599; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2600 | MOZ_ASSERT(lhs->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs->type() == MIRType::Int32 ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "lhs->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2600); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2600; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2601 | return foldIfAllBitsSet(0); |
| 2602 | } |
| 2603 | |
| 2604 | if (maskMatchesLeftRange) { |
| 2605 | MOZ_ASSERT(rhs->isConstant())do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs->isConstant())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(rhs->isConstant()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("rhs->isConstant()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2605); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs->isConstant()" ")"); do { *((volatile int*)__null) = 2605; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2606 | MOZ_ASSERT(rhs->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(rhs->type() == MIRType::Int32 ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "rhs->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2606); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 2606; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2607 | return foldIfAllBitsSet(1); |
| 2608 | } |
| 2609 | |
| 2610 | return this; |
| 2611 | } |
| 2612 | |
| 2613 | static inline bool CanProduceNegativeZero(MDefinition* def) { |
| 2614 | // Test if this instruction can produce negative zero even when bailing out |
| 2615 | // and changing types. |
| 2616 | switch (def->op()) { |
| 2617 | case MDefinition::Opcode::Constant: |
| 2618 | if (def->type() == MIRType::Double && |
| 2619 | def->toConstant()->toDouble() == -0.0) { |
| 2620 | return true; |
| 2621 | } |
| 2622 | [[fallthrough]]; |
| 2623 | case MDefinition::Opcode::BitAnd: |
| 2624 | case MDefinition::Opcode::BitOr: |
| 2625 | case MDefinition::Opcode::BitXor: |
| 2626 | case MDefinition::Opcode::BitNot: |
| 2627 | case MDefinition::Opcode::Lsh: |
| 2628 | case MDefinition::Opcode::Rsh: |
| 2629 | return false; |
| 2630 | default: |
| 2631 | return true; |
| 2632 | } |
| 2633 | } |
| 2634 | |
| 2635 | static inline bool NeedNegativeZeroCheck(MDefinition* def) { |
| 2636 | if (def->isGuard() || def->isGuardRangeBailouts()) { |
| 2637 | return true; |
| 2638 | } |
| 2639 | |
| 2640 | // Test if all uses have the same semantics for -0 and 0 |
| 2641 | for (MUseIterator use = def->usesBegin(); use != def->usesEnd(); use++) { |
| 2642 | if (use->consumer()->isResumePoint()) { |
| 2643 | return true; |
| 2644 | } |
| 2645 | |
| 2646 | MDefinition* use_def = use->consumer()->toDefinition(); |
| 2647 | switch (use_def->op()) { |
| 2648 | case MDefinition::Opcode::Add: { |
| 2649 | // If add is truncating -0 and 0 are observed as the same. |
| 2650 | if (use_def->toAdd()->isTruncated()) { |
| 2651 | break; |
| 2652 | } |
| 2653 | |
| 2654 | // x + y gives -0, when both x and y are -0 |
| 2655 | |
| 2656 | // Figure out the order in which the addition's operands will |
| 2657 | // execute. EdgeCaseAnalysis::analyzeLate has renumbered the MIR |
| 2658 | // definitions for us so that this just requires comparing ids. |
| 2659 | MDefinition* first = use_def->toAdd()->lhs(); |
| 2660 | MDefinition* second = use_def->toAdd()->rhs(); |
| 2661 | if (first->id() > second->id()) { |
| 2662 | std::swap(first, second); |
| 2663 | } |
| 2664 | // Negative zero checks can be removed on the first executed |
| 2665 | // operand only if it is guaranteed the second executed operand |
| 2666 | // will produce a value other than -0. While the second is |
| 2667 | // typed as an int32, a bailout taken between execution of the |
| 2668 | // operands may change that type and cause a -0 to flow to the |
| 2669 | // second. |
| 2670 | // |
| 2671 | // There is no way to test whether there are any bailouts |
| 2672 | // between execution of the operands, so remove negative |
| 2673 | // zero checks from the first only if the second's type is |
| 2674 | // independent from type changes that may occur after bailing. |
| 2675 | if (def == first && CanProduceNegativeZero(second)) { |
| 2676 | return true; |
| 2677 | } |
| 2678 | |
| 2679 | // The negative zero check can always be removed on the second |
| 2680 | // executed operand; by the time this executes the first will have |
| 2681 | // been evaluated as int32 and the addition's result cannot be -0. |
| 2682 | break; |
| 2683 | } |
| 2684 | case MDefinition::Opcode::Sub: { |
| 2685 | // If sub is truncating -0 and 0 are observed as the same |
| 2686 | if (use_def->toSub()->isTruncated()) { |
| 2687 | break; |
| 2688 | } |
| 2689 | |
| 2690 | // x + y gives -0, when x is -0 and y is 0 |
| 2691 | |
| 2692 | // We can remove the negative zero check on the rhs, only if we |
| 2693 | // are sure the lhs isn't negative zero. |
| 2694 | |
| 2695 | // The lhs is typed as integer (i.e. not -0.0), but it can bailout |
| 2696 | // and change type. This should be fine if the lhs is executed |
| 2697 | // first. However if the rhs is executed first, the lhs can bail, |
| 2698 | // change type and become -0.0 while the rhs has already been |
| 2699 | // optimized to not make a difference between zero and negative zero. |
| 2700 | MDefinition* lhs = use_def->toSub()->lhs(); |
| 2701 | MDefinition* rhs = use_def->toSub()->rhs(); |
| 2702 | if (rhs->id() < lhs->id() && CanProduceNegativeZero(lhs)) { |
| 2703 | return true; |
| 2704 | } |
| 2705 | |
| 2706 | [[fallthrough]]; |
| 2707 | } |
| 2708 | case MDefinition::Opcode::StoreElement: |
| 2709 | case MDefinition::Opcode::StoreHoleValueElement: |
| 2710 | case MDefinition::Opcode::LoadElement: |
| 2711 | case MDefinition::Opcode::LoadElementHole: |
| 2712 | case MDefinition::Opcode::LoadUnboxedScalar: |
| 2713 | case MDefinition::Opcode::LoadDataViewElement: |
| 2714 | case MDefinition::Opcode::LoadTypedArrayElementHole: |
| 2715 | case MDefinition::Opcode::CharCodeAt: |
| 2716 | case MDefinition::Opcode::Mod: |
| 2717 | case MDefinition::Opcode::InArray: |
| 2718 | // Only allowed to remove check when definition is the second operand |
| 2719 | if (use_def->getOperand(0) == def) { |
| 2720 | return true; |
| 2721 | } |
| 2722 | for (size_t i = 2, e = use_def->numOperands(); i < e; i++) { |
| 2723 | if (use_def->getOperand(i) == def) { |
| 2724 | return true; |
| 2725 | } |
| 2726 | } |
| 2727 | break; |
| 2728 | case MDefinition::Opcode::BoundsCheck: |
| 2729 | // Only allowed to remove check when definition is the first operand |
| 2730 | if (use_def->toBoundsCheck()->getOperand(1) == def) { |
| 2731 | return true; |
| 2732 | } |
| 2733 | break; |
| 2734 | case MDefinition::Opcode::ToString: |
| 2735 | case MDefinition::Opcode::FromCharCode: |
| 2736 | case MDefinition::Opcode::FromCodePoint: |
| 2737 | case MDefinition::Opcode::TableSwitch: |
| 2738 | case MDefinition::Opcode::Compare: |
| 2739 | case MDefinition::Opcode::BitAnd: |
| 2740 | case MDefinition::Opcode::BitOr: |
| 2741 | case MDefinition::Opcode::BitXor: |
| 2742 | case MDefinition::Opcode::Abs: |
| 2743 | case MDefinition::Opcode::TruncateToInt32: |
| 2744 | // Always allowed to remove check. No matter which operand. |
| 2745 | break; |
| 2746 | case MDefinition::Opcode::StoreElementHole: |
| 2747 | case MDefinition::Opcode::StoreTypedArrayElementHole: |
| 2748 | case MDefinition::Opcode::PostWriteElementBarrier: |
| 2749 | // Only allowed to remove check when definition is the third operand. |
| 2750 | for (size_t i = 0, e = use_def->numOperands(); i < e; i++) { |
| 2751 | if (i == 2) { |
| 2752 | continue; |
| 2753 | } |
| 2754 | if (use_def->getOperand(i) == def) { |
| 2755 | return true; |
| 2756 | } |
| 2757 | } |
| 2758 | break; |
| 2759 | default: |
| 2760 | return true; |
| 2761 | } |
| 2762 | } |
| 2763 | return false; |
| 2764 | } |
| 2765 | |
| 2766 | #ifdef JS_JITSPEW1 |
| 2767 | void MBinaryArithInstruction::printOpcode(GenericPrinter& out) const { |
| 2768 | MDefinition::printOpcode(out); |
| 2769 | |
| 2770 | switch (type()) { |
| 2771 | case MIRType::Int32: |
| 2772 | if (isDiv()) { |
| 2773 | out.printf(" [%s]", toDiv()->isUnsigned() ? "uint32" : "int32"); |
| 2774 | } else if (isMod()) { |
| 2775 | out.printf(" [%s]", toMod()->isUnsigned() ? "uint32" : "int32"); |
| 2776 | } else { |
| 2777 | out.printf(" [int32]"); |
| 2778 | } |
| 2779 | break; |
| 2780 | case MIRType::Int64: |
| 2781 | if (isDiv()) { |
| 2782 | out.printf(" [%s]", toDiv()->isUnsigned() ? "uint64" : "int64"); |
| 2783 | } else if (isMod()) { |
| 2784 | out.printf(" [%s]", toMod()->isUnsigned() ? "uint64" : "int64"); |
| 2785 | } else { |
| 2786 | out.printf(" [int64]"); |
| 2787 | } |
| 2788 | break; |
| 2789 | case MIRType::Float32: |
| 2790 | out.printf(" [float]"); |
| 2791 | break; |
| 2792 | case MIRType::Double: |
| 2793 | out.printf(" [double]"); |
| 2794 | break; |
| 2795 | default: |
| 2796 | break; |
| 2797 | } |
| 2798 | } |
| 2799 | #endif |
| 2800 | |
| 2801 | MDefinition* MRsh::foldsTo(TempAllocator& alloc) { |
| 2802 | MDefinition* f = MBinaryBitwiseInstruction::foldsTo(alloc); |
| 2803 | |
| 2804 | if (f != this) { |
| 2805 | return f; |
| 2806 | } |
| 2807 | |
| 2808 | MDefinition* lhs = getOperand(0); |
| 2809 | MDefinition* rhs = getOperand(1); |
| 2810 | |
| 2811 | // It's probably OK to perform this optimization only for int32, as it will |
| 2812 | // have the greatest effect for asm.js code that is compiled with the JS |
| 2813 | // pipeline, and that code will not see int64 values. |
| 2814 | |
| 2815 | if (!lhs->isLsh() || !rhs->isConstant() || rhs->type() != MIRType::Int32) { |
| 2816 | return this; |
| 2817 | } |
| 2818 | |
| 2819 | if (!lhs->getOperand(1)->isConstant() || |
| 2820 | lhs->getOperand(1)->type() != MIRType::Int32) { |
| 2821 | return this; |
| 2822 | } |
| 2823 | |
| 2824 | uint32_t shift = rhs->toConstant()->toInt32(); |
| 2825 | uint32_t shift_lhs = lhs->getOperand(1)->toConstant()->toInt32(); |
| 2826 | if (shift != shift_lhs) { |
| 2827 | return this; |
| 2828 | } |
| 2829 | |
| 2830 | switch (shift) { |
| 2831 | case 16: |
| 2832 | return MSignExtendInt32::New(alloc, lhs->getOperand(0), |
| 2833 | MSignExtendInt32::Half); |
| 2834 | case 24: |
| 2835 | return MSignExtendInt32::New(alloc, lhs->getOperand(0), |
| 2836 | MSignExtendInt32::Byte); |
| 2837 | } |
| 2838 | |
| 2839 | return this; |
| 2840 | } |
| 2841 | |
| 2842 | MDefinition* MBinaryArithInstruction::foldsTo(TempAllocator& alloc) { |
| 2843 | MOZ_ASSERT(IsNumberType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNumberType(type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsNumberType(type())))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IsNumberType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2843); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNumberType(type())" ")"); do { *((volatile int*)__null) = 2843; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2844 | |
| 2845 | MDefinition* lhs = getOperand(0); |
| 2846 | MDefinition* rhs = getOperand(1); |
| 2847 | |
| 2848 | if (type() == MIRType::Int64) { |
| 2849 | MOZ_ASSERT(!isTruncated())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!isTruncated())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!isTruncated()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!isTruncated()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2849); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!isTruncated()" ")"); do { *((volatile int*)__null) = 2849; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2850 | |
| 2851 | if (MConstant* folded = EvaluateInt64ConstantOperands(alloc, this)) { |
| 2852 | if (!folded->block()) { |
| 2853 | block()->insertBefore(this, folded); |
| 2854 | } |
| 2855 | return folded; |
| 2856 | } |
| 2857 | if (isSub() || isDiv() || isMod()) { |
| 2858 | return this; |
| 2859 | } |
| 2860 | if (rhs->isConstant() && |
| 2861 | rhs->toConstant()->toInt64() == int64_t(getIdentity())) { |
| 2862 | return lhs; |
| 2863 | } |
| 2864 | if (lhs->isConstant() && |
| 2865 | lhs->toConstant()->toInt64() == int64_t(getIdentity())) { |
| 2866 | return rhs; |
| 2867 | } |
| 2868 | return this; |
| 2869 | } |
| 2870 | |
| 2871 | if (MConstant* folded = EvaluateConstantOperands(alloc, this)) { |
| 2872 | if (isTruncated()) { |
| 2873 | if (!folded->block()) { |
| 2874 | block()->insertBefore(this, folded); |
| 2875 | } |
| 2876 | if (folded->type() != MIRType::Int32) { |
| 2877 | return MTruncateToInt32::New(alloc, folded); |
| 2878 | } |
| 2879 | } |
| 2880 | return folded; |
| 2881 | } |
| 2882 | |
| 2883 | if (MConstant* folded = EvaluateConstantNaNOperand(this)) { |
| 2884 | MOZ_ASSERT(!isTruncated())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!isTruncated())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!isTruncated()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!isTruncated()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2884); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!isTruncated()" ")"); do { *((volatile int*)__null) = 2884; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2885 | return folded; |
| 2886 | } |
| 2887 | |
| 2888 | if (mustPreserveNaN_) { |
| 2889 | return this; |
| 2890 | } |
| 2891 | |
| 2892 | // 0 + -0 = 0. So we can't remove addition |
| 2893 | if (isAdd() && type() != MIRType::Int32) { |
| 2894 | return this; |
| 2895 | } |
| 2896 | |
| 2897 | if (IsConstant(rhs, getIdentity())) { |
| 2898 | if (isTruncated()) { |
| 2899 | return MTruncateToInt32::New(alloc, lhs); |
| 2900 | } |
| 2901 | return lhs; |
| 2902 | } |
| 2903 | |
| 2904 | // subtraction isn't commutative. So we can't remove subtraction when lhs |
| 2905 | // equals 0 |
| 2906 | if (isSub()) { |
| 2907 | return this; |
| 2908 | } |
| 2909 | |
| 2910 | if (IsConstant(lhs, getIdentity())) { |
| 2911 | if (isTruncated()) { |
| 2912 | return MTruncateToInt32::New(alloc, rhs); |
| 2913 | } |
| 2914 | return rhs; // id op x => x |
| 2915 | } |
| 2916 | |
| 2917 | return this; |
| 2918 | } |
| 2919 | |
| 2920 | void MBinaryArithInstruction::trySpecializeFloat32(TempAllocator& alloc) { |
| 2921 | MOZ_ASSERT(IsNumberType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNumberType(type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsNumberType(type())))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IsNumberType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2921); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNumberType(type())" ")"); do { *((volatile int*)__null) = 2921; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2922 | |
| 2923 | // Do not use Float32 if we can use int32. |
| 2924 | if (type() == MIRType::Int32) { |
| 2925 | return; |
| 2926 | } |
| 2927 | |
| 2928 | if (EnsureFloatConsumersAndInputOrConvert(this, alloc)) { |
| 2929 | setResultType(MIRType::Float32); |
| 2930 | } |
| 2931 | } |
| 2932 | |
| 2933 | void MMinMax::trySpecializeFloat32(TempAllocator& alloc) { |
| 2934 | if (type() == MIRType::Int32) { |
| 2935 | return; |
| 2936 | } |
| 2937 | |
| 2938 | MDefinition* left = lhs(); |
| 2939 | MDefinition* right = rhs(); |
| 2940 | |
| 2941 | if ((left->canProduceFloat32() || |
| 2942 | (left->isMinMax() && left->type() == MIRType::Float32)) && |
| 2943 | (right->canProduceFloat32() || |
| 2944 | (right->isMinMax() && right->type() == MIRType::Float32))) { |
| 2945 | setResultType(MIRType::Float32); |
| 2946 | } else { |
| 2947 | ConvertOperandsToDouble(this, alloc); |
| 2948 | } |
| 2949 | } |
| 2950 | |
| 2951 | MDefinition* MMinMax::foldsTo(TempAllocator& alloc) { |
| 2952 | MOZ_ASSERT(lhs()->type() == type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs()->type() == type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs()->type() == type())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("lhs()->type() == type()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2952); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs()->type() == type()" ")"); do { *((volatile int*)__null) = 2952; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2953 | MOZ_ASSERT(rhs()->type() == type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs()->type() == type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(rhs()->type() == type())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("rhs()->type() == type()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2953); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs()->type() == type()" ")"); do { *((volatile int*)__null) = 2953; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2954 | |
| 2955 | if (lhs() == rhs()) { |
| 2956 | return lhs(); |
| 2957 | } |
| 2958 | |
| 2959 | auto foldConstants = [&alloc](MDefinition* lhs, MDefinition* rhs, |
| 2960 | bool isMax) -> MConstant* { |
| 2961 | MOZ_ASSERT(lhs->type() == rhs->type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->type() == rhs->type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs->type() == rhs->type ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("lhs->type() == rhs->type()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2961); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->type() == rhs->type()" ")"); do { *((volatile int*)__null) = 2961; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2962 | MOZ_ASSERT(lhs->toConstant()->isTypeRepresentableAsDouble())do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->toConstant()->isTypeRepresentableAsDouble ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(lhs->toConstant()->isTypeRepresentableAsDouble ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("lhs->toConstant()->isTypeRepresentableAsDouble()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2962); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->toConstant()->isTypeRepresentableAsDouble()" ")"); do { *((volatile int*)__null) = 2962; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2963 | MOZ_ASSERT(rhs->toConstant()->isTypeRepresentableAsDouble())do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs->toConstant()->isTypeRepresentableAsDouble ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(rhs->toConstant()->isTypeRepresentableAsDouble ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("rhs->toConstant()->isTypeRepresentableAsDouble()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2963); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs->toConstant()->isTypeRepresentableAsDouble()" ")"); do { *((volatile int*)__null) = 2963; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2964 | |
| 2965 | double lnum = lhs->toConstant()->numberToDouble(); |
| 2966 | double rnum = rhs->toConstant()->numberToDouble(); |
| 2967 | |
| 2968 | double result; |
| 2969 | if (isMax) { |
| 2970 | result = js::math_max_impl(lnum, rnum); |
| 2971 | } else { |
| 2972 | result = js::math_min_impl(lnum, rnum); |
| 2973 | } |
| 2974 | |
| 2975 | // The folded MConstant should maintain the same MIRType with the original |
| 2976 | // inputs. |
| 2977 | if (lhs->type() == MIRType::Int32) { |
| 2978 | int32_t cast; |
| 2979 | if (mozilla::NumberEqualsInt32(result, &cast)) { |
| 2980 | return MConstant::New(alloc, Int32Value(cast)); |
| 2981 | } |
| 2982 | return nullptr; |
| 2983 | } |
| 2984 | if (lhs->type() == MIRType::Float32) { |
| 2985 | return MConstant::NewFloat32(alloc, result); |
| 2986 | } |
| 2987 | MOZ_ASSERT(lhs->type() == MIRType::Double)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->type() == MIRType::Double)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs->type() == MIRType::Double ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "lhs->type() == MIRType::Double", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 2987); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->type() == MIRType::Double" ")"); do { *((volatile int*)__null) = 2987; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2988 | return MConstant::New(alloc, DoubleValue(result)); |
| 2989 | }; |
| 2990 | |
| 2991 | // Try to fold the following patterns when |x| and |y| are constants. |
| 2992 | // |
| 2993 | // min(min(x, z), min(y, z)) = min(min(x, y), z) |
| 2994 | // max(max(x, z), max(y, z)) = max(max(x, y), z) |
| 2995 | // max(min(x, z), min(y, z)) = min(max(x, y), z) |
| 2996 | // min(max(x, z), max(y, z)) = max(min(x, y), z) |
| 2997 | if (lhs()->isMinMax() && rhs()->isMinMax()) { |
| 2998 | do { |
| 2999 | auto* left = lhs()->toMinMax(); |
| 3000 | auto* right = rhs()->toMinMax(); |
| 3001 | if (left->isMax() != right->isMax()) { |
| 3002 | break; |
| 3003 | } |
| 3004 | |
| 3005 | MDefinition* x; |
| 3006 | MDefinition* y; |
| 3007 | MDefinition* z; |
| 3008 | if (left->lhs() == right->lhs()) { |
| 3009 | std::tie(x, y, z) = std::tuple{left->rhs(), right->rhs(), left->lhs()}; |
| 3010 | } else if (left->lhs() == right->rhs()) { |
| 3011 | std::tie(x, y, z) = std::tuple{left->rhs(), right->lhs(), left->lhs()}; |
| 3012 | } else if (left->rhs() == right->lhs()) { |
| 3013 | std::tie(x, y, z) = std::tuple{left->lhs(), right->rhs(), left->rhs()}; |
| 3014 | } else if (left->rhs() == right->rhs()) { |
| 3015 | std::tie(x, y, z) = std::tuple{left->lhs(), right->lhs(), left->rhs()}; |
| 3016 | } else { |
| 3017 | break; |
| 3018 | } |
| 3019 | |
| 3020 | if (!x->isConstant() || !x->toConstant()->isTypeRepresentableAsDouble() || |
| 3021 | !y->isConstant() || !y->toConstant()->isTypeRepresentableAsDouble()) { |
| 3022 | break; |
| 3023 | } |
| 3024 | |
| 3025 | if (auto* folded = foldConstants(x, y, isMax())) { |
| 3026 | block()->insertBefore(this, folded); |
| 3027 | return MMinMax::New(alloc, folded, z, type(), left->isMax()); |
| 3028 | } |
| 3029 | } while (false); |
| 3030 | } |
| 3031 | |
| 3032 | // Fold min/max operations with same inputs. |
| 3033 | if (lhs()->isMinMax() || rhs()->isMinMax()) { |
| 3034 | auto* other = lhs()->isMinMax() ? lhs()->toMinMax() : rhs()->toMinMax(); |
| 3035 | auto* operand = lhs()->isMinMax() ? rhs() : lhs(); |
| 3036 | |
| 3037 | if (operand == other->lhs() || operand == other->rhs()) { |
| 3038 | if (isMax() == other->isMax()) { |
| 3039 | // min(x, min(x, y)) = min(x, y) |
| 3040 | // max(x, max(x, y)) = max(x, y) |
| 3041 | return other; |
| 3042 | } |
| 3043 | if (!IsFloatingPointType(type())) { |
| 3044 | // When neither value is NaN: |
| 3045 | // max(x, min(x, y)) = x |
| 3046 | // min(x, max(x, y)) = x |
| 3047 | |
| 3048 | // Ensure that any bailouts that we depend on to guarantee that |y| is |
| 3049 | // Int32 are not removed. |
| 3050 | auto* otherOp = operand == other->lhs() ? other->rhs() : other->lhs(); |
| 3051 | otherOp->setGuardRangeBailoutsUnchecked(); |
| 3052 | |
| 3053 | return operand; |
| 3054 | } |
| 3055 | } |
| 3056 | } |
| 3057 | |
| 3058 | if (!lhs()->isConstant() && !rhs()->isConstant()) { |
| 3059 | return this; |
| 3060 | } |
| 3061 | |
| 3062 | // Directly apply math utility to compare the rhs() and lhs() when |
| 3063 | // they are both constants. |
| 3064 | if (lhs()->isConstant() && rhs()->isConstant()) { |
| 3065 | if (!lhs()->toConstant()->isTypeRepresentableAsDouble() || |
| 3066 | !rhs()->toConstant()->isTypeRepresentableAsDouble()) { |
| 3067 | return this; |
| 3068 | } |
| 3069 | |
| 3070 | if (auto* folded = foldConstants(lhs(), rhs(), isMax())) { |
| 3071 | return folded; |
| 3072 | } |
| 3073 | } |
| 3074 | |
| 3075 | MDefinition* operand = lhs()->isConstant() ? rhs() : lhs(); |
| 3076 | MConstant* constant = |
| 3077 | lhs()->isConstant() ? lhs()->toConstant() : rhs()->toConstant(); |
| 3078 | |
| 3079 | if (operand->isToDouble() && |
| 3080 | operand->getOperand(0)->type() == MIRType::Int32) { |
| 3081 | // min(int32, cte >= INT32_MAX) = int32 |
| 3082 | if (!isMax() && constant->isTypeRepresentableAsDouble() && |
| 3083 | constant->numberToDouble() >= INT32_MAX(2147483647)) { |
| 3084 | MLimitedTruncate* limit = MLimitedTruncate::New( |
| 3085 | alloc, operand->getOperand(0), TruncateKind::NoTruncate); |
| 3086 | block()->insertBefore(this, limit); |
| 3087 | MToDouble* toDouble = MToDouble::New(alloc, limit); |
| 3088 | return toDouble; |
| 3089 | } |
| 3090 | |
| 3091 | // max(int32, cte <= INT32_MIN) = int32 |
| 3092 | if (isMax() && constant->isTypeRepresentableAsDouble() && |
| 3093 | constant->numberToDouble() <= INT32_MIN(-2147483647-1)) { |
| 3094 | MLimitedTruncate* limit = MLimitedTruncate::New( |
| 3095 | alloc, operand->getOperand(0), TruncateKind::NoTruncate); |
| 3096 | block()->insertBefore(this, limit); |
| 3097 | MToDouble* toDouble = MToDouble::New(alloc, limit); |
| 3098 | return toDouble; |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | auto foldLength = [](MDefinition* operand, MConstant* constant, |
| 3103 | bool isMax) -> MDefinition* { |
| 3104 | if ((operand->isArrayLength() || operand->isArrayBufferViewLength() || |
| 3105 | operand->isArgumentsLength() || operand->isStringLength()) && |
| 3106 | constant->type() == MIRType::Int32) { |
| 3107 | // (Array|ArrayBufferView|Arguments|String)Length is always >= 0. |
| 3108 | // max(array.length, cte <= 0) = array.length |
| 3109 | // min(array.length, cte <= 0) = cte |
| 3110 | if (constant->toInt32() <= 0) { |
| 3111 | return isMax ? operand : constant; |
| 3112 | } |
| 3113 | } |
| 3114 | return nullptr; |
| 3115 | }; |
| 3116 | |
| 3117 | if (auto* folded = foldLength(operand, constant, isMax())) { |
| 3118 | return folded; |
| 3119 | } |
| 3120 | |
| 3121 | // Attempt to fold nested min/max operations which are produced by |
| 3122 | // self-hosted built-in functions. |
| 3123 | if (operand->isMinMax()) { |
| 3124 | auto* other = operand->toMinMax(); |
| 3125 | MOZ_ASSERT(other->lhs()->type() == type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(other->lhs()->type() == type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(other->lhs()->type() == type()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("other->lhs()->type() == type()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3125); AnnotateMozCrashReason("MOZ_ASSERT" "(" "other->lhs()->type() == type()" ")"); do { *((volatile int*)__null) = 3125; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3126 | MOZ_ASSERT(other->rhs()->type() == type())do { static_assert( mozilla::detail::AssertionConditionType< decltype(other->rhs()->type() == type())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(other->rhs()->type() == type()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("other->rhs()->type() == type()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3126); AnnotateMozCrashReason("MOZ_ASSERT" "(" "other->rhs()->type() == type()" ")"); do { *((volatile int*)__null) = 3126; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3127 | |
| 3128 | MConstant* otherConstant = nullptr; |
| 3129 | MDefinition* otherOperand = nullptr; |
| 3130 | if (other->lhs()->isConstant()) { |
| 3131 | otherConstant = other->lhs()->toConstant(); |
| 3132 | otherOperand = other->rhs(); |
| 3133 | } else if (other->rhs()->isConstant()) { |
| 3134 | otherConstant = other->rhs()->toConstant(); |
| 3135 | otherOperand = other->lhs(); |
| 3136 | } |
| 3137 | |
| 3138 | if (otherConstant && constant->isTypeRepresentableAsDouble() && |
| 3139 | otherConstant->isTypeRepresentableAsDouble()) { |
| 3140 | if (isMax() == other->isMax()) { |
| 3141 | // Fold min(x, min(y, z)) to min(min(x, y), z) with constant min(x, y). |
| 3142 | // Fold max(x, max(y, z)) to max(max(x, y), z) with constant max(x, y). |
| 3143 | if (auto* left = foldConstants(constant, otherConstant, isMax())) { |
| 3144 | block()->insertBefore(this, left); |
| 3145 | return MMinMax::New(alloc, left, otherOperand, type(), isMax()); |
| 3146 | } |
| 3147 | } else { |
| 3148 | // Fold min(x, max(y, z)) to max(min(x, y), min(x, z)). |
| 3149 | // Fold max(x, min(y, z)) to min(max(x, y), max(x, z)). |
| 3150 | // |
| 3151 | // But only do this when min(x, z) can also be simplified. |
| 3152 | if (auto* right = foldLength(otherOperand, constant, isMax())) { |
| 3153 | if (auto* left = foldConstants(constant, otherConstant, isMax())) { |
| 3154 | block()->insertBefore(this, left); |
| 3155 | return MMinMax::New(alloc, left, right, type(), !isMax()); |
| 3156 | } |
| 3157 | } |
| 3158 | } |
| 3159 | } |
| 3160 | } |
| 3161 | |
| 3162 | return this; |
| 3163 | } |
| 3164 | |
| 3165 | #ifdef JS_JITSPEW1 |
| 3166 | void MMinMax::printOpcode(GenericPrinter& out) const { |
| 3167 | MDefinition::printOpcode(out); |
| 3168 | out.printf(" (%s)", isMax() ? "max" : "min"); |
| 3169 | } |
| 3170 | |
| 3171 | void MMinMaxArray::printOpcode(GenericPrinter& out) const { |
| 3172 | MDefinition::printOpcode(out); |
| 3173 | out.printf(" (%s)", isMax() ? "max" : "min"); |
| 3174 | } |
| 3175 | #endif |
| 3176 | |
| 3177 | MDefinition* MPow::foldsConstant(TempAllocator& alloc) { |
| 3178 | // Both `x` and `p` in `x^p` must be constants in order to precompute. |
| 3179 | if (!input()->isConstant() || !power()->isConstant()) { |
| 3180 | return nullptr; |
| 3181 | } |
| 3182 | if (!power()->toConstant()->isTypeRepresentableAsDouble()) { |
| 3183 | return nullptr; |
| 3184 | } |
| 3185 | if (!input()->toConstant()->isTypeRepresentableAsDouble()) { |
| 3186 | return nullptr; |
| 3187 | } |
| 3188 | |
| 3189 | double x = input()->toConstant()->numberToDouble(); |
| 3190 | double p = power()->toConstant()->numberToDouble(); |
| 3191 | double result = js::ecmaPow(x, p); |
| 3192 | if (type() == MIRType::Int32) { |
| 3193 | int32_t cast; |
| 3194 | if (!mozilla::NumberIsInt32(result, &cast)) { |
| 3195 | // Reject folding if the result isn't an int32, because we'll bail anyway. |
| 3196 | return nullptr; |
| 3197 | } |
| 3198 | return MConstant::New(alloc, Int32Value(cast)); |
| 3199 | } |
| 3200 | return MConstant::New(alloc, DoubleValue(result)); |
| 3201 | } |
| 3202 | |
| 3203 | MDefinition* MPow::foldsConstantPower(TempAllocator& alloc) { |
| 3204 | // If `p` in `x^p` isn't constant, we can't apply these folds. |
| 3205 | if (!power()->isConstant()) { |
| 3206 | return nullptr; |
| 3207 | } |
| 3208 | if (!power()->toConstant()->isTypeRepresentableAsDouble()) { |
| 3209 | return nullptr; |
| 3210 | } |
| 3211 | |
| 3212 | MOZ_ASSERT(type() == MIRType::Double || type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Double || type() == MIRType::Int32 )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(type() == MIRType::Double || type() == MIRType::Int32 ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "type() == MIRType::Double || type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3212); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Double || type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3212; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3213 | |
| 3214 | // NOTE: The optimizations must match the optimizations used in |js::ecmaPow| |
| 3215 | // resp. |js::powi| to avoid differential testing issues. |
| 3216 | |
| 3217 | double pow = power()->toConstant()->numberToDouble(); |
| 3218 | |
| 3219 | // Math.pow(x, 0.5) is a sqrt with edge-case detection. |
| 3220 | if (pow == 0.5) { |
| 3221 | MOZ_ASSERT(type() == MIRType::Double)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Double)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Double))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Double" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3221); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Double" ")"); do { *((volatile int*)__null) = 3221; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3222 | return MPowHalf::New(alloc, input()); |
| 3223 | } |
| 3224 | |
| 3225 | // Math.pow(x, -0.5) == 1 / Math.pow(x, 0.5), even for edge cases. |
| 3226 | if (pow == -0.5) { |
| 3227 | MOZ_ASSERT(type() == MIRType::Double)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Double)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Double))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Double" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3227); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Double" ")"); do { *((volatile int*)__null) = 3227; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3228 | MPowHalf* half = MPowHalf::New(alloc, input()); |
| 3229 | block()->insertBefore(this, half); |
| 3230 | MConstant* one = MConstant::New(alloc, DoubleValue(1.0)); |
| 3231 | block()->insertBefore(this, one); |
| 3232 | return MDiv::New(alloc, one, half, MIRType::Double); |
| 3233 | } |
| 3234 | |
| 3235 | // Math.pow(x, 1) == x. |
| 3236 | if (pow == 1.0) { |
| 3237 | return input(); |
| 3238 | } |
| 3239 | |
| 3240 | auto multiply = [this, &alloc](MDefinition* lhs, MDefinition* rhs) { |
| 3241 | MMul* mul = MMul::New(alloc, lhs, rhs, type()); |
| 3242 | mul->setBailoutKind(bailoutKind()); |
| 3243 | |
| 3244 | // Multiplying the same number can't yield negative zero. |
| 3245 | mul->setCanBeNegativeZero(lhs != rhs && canBeNegativeZero()); |
| 3246 | return mul; |
| 3247 | }; |
| 3248 | |
| 3249 | // Math.pow(x, 2) == x*x. |
| 3250 | if (pow == 2.0) { |
| 3251 | return multiply(input(), input()); |
| 3252 | } |
| 3253 | |
| 3254 | // Math.pow(x, 3) == x*x*x. |
| 3255 | if (pow == 3.0) { |
| 3256 | MMul* mul1 = multiply(input(), input()); |
| 3257 | block()->insertBefore(this, mul1); |
| 3258 | return multiply(input(), mul1); |
| 3259 | } |
| 3260 | |
| 3261 | // Math.pow(x, 4) == y*y, where y = x*x. |
| 3262 | if (pow == 4.0) { |
| 3263 | MMul* y = multiply(input(), input()); |
| 3264 | block()->insertBefore(this, y); |
| 3265 | return multiply(y, y); |
| 3266 | } |
| 3267 | |
| 3268 | // Math.pow(x, NaN) == NaN. |
| 3269 | if (std::isnan(pow)) { |
| 3270 | return power(); |
| 3271 | } |
| 3272 | |
| 3273 | // No optimization |
| 3274 | return nullptr; |
| 3275 | } |
| 3276 | |
| 3277 | MDefinition* MPow::foldsTo(TempAllocator& alloc) { |
| 3278 | if (MDefinition* def = foldsConstant(alloc)) { |
| 3279 | return def; |
| 3280 | } |
| 3281 | if (MDefinition* def = foldsConstantPower(alloc)) { |
| 3282 | return def; |
| 3283 | } |
| 3284 | return this; |
| 3285 | } |
| 3286 | |
| 3287 | MDefinition* MBigIntPow::foldsTo(TempAllocator& alloc) { |
| 3288 | auto* base = lhs(); |
| 3289 | MOZ_ASSERT(base->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(base->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(base->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("base->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3289); AnnotateMozCrashReason("MOZ_ASSERT" "(" "base->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 3289; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3290 | |
| 3291 | auto* power = rhs(); |
| 3292 | MOZ_ASSERT(power->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(power->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(power->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("power->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3292); AnnotateMozCrashReason("MOZ_ASSERT" "(" "power->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 3292; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3293 | |
| 3294 | // |power| must be a constant. |
| 3295 | if (!power->isConstant()) { |
| 3296 | return this; |
| 3297 | } |
| 3298 | |
| 3299 | int32_t pow; |
| 3300 | if (BigInt::isInt32(power->toConstant()->toBigInt(), &pow)) { |
| 3301 | // x ** 1n == x. |
| 3302 | if (pow == 1) { |
| 3303 | return base; |
| 3304 | } |
| 3305 | |
| 3306 | // x ** 2n == x*x. |
| 3307 | if (pow == 2) { |
| 3308 | auto* mul = MBigIntMul::New(alloc, base, base); |
| 3309 | mul->setBailoutKind(bailoutKind()); |
| 3310 | return mul; |
| 3311 | } |
| 3312 | } |
| 3313 | |
| 3314 | // No optimization |
| 3315 | return this; |
| 3316 | } |
| 3317 | |
| 3318 | bool MBigIntPtrBinaryArithInstruction::isMaybeZero(MDefinition* ins) { |
| 3319 | MOZ_ASSERT(ins->type() == MIRType::IntPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::IntPtr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::IntPtr ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::IntPtr", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3319); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::IntPtr" ")"); do { *((volatile int*)__null) = 3319; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3320 | if (ins->isBigIntToIntPtr()) { |
| 3321 | ins = ins->toBigIntToIntPtr()->input(); |
| 3322 | } |
| 3323 | if (ins->isConstant()) { |
| 3324 | if (ins->type() == MIRType::IntPtr) { |
| 3325 | return ins->toConstant()->toIntPtr() == 0; |
| 3326 | } |
| 3327 | MOZ_ASSERT(ins->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::BigInt ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3327); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 3327; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3328 | return ins->toConstant()->toBigInt()->isZero(); |
| 3329 | } |
| 3330 | return true; |
| 3331 | } |
| 3332 | |
| 3333 | bool MBigIntPtrBinaryArithInstruction::isMaybeNegative(MDefinition* ins) { |
| 3334 | MOZ_ASSERT(ins->type() == MIRType::IntPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::IntPtr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::IntPtr ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::IntPtr", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3334); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::IntPtr" ")"); do { *((volatile int*)__null) = 3334; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3335 | if (ins->isBigIntToIntPtr()) { |
| 3336 | ins = ins->toBigIntToIntPtr()->input(); |
| 3337 | } |
| 3338 | if (ins->isConstant()) { |
| 3339 | if (ins->type() == MIRType::IntPtr) { |
| 3340 | return ins->toConstant()->toIntPtr() < 0; |
| 3341 | } |
| 3342 | MOZ_ASSERT(ins->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::BigInt ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3342); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 3342; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3343 | return ins->toConstant()->toBigInt()->isNegative(); |
| 3344 | } |
| 3345 | return true; |
| 3346 | } |
| 3347 | |
| 3348 | MDefinition* MInt32ToIntPtr::foldsTo(TempAllocator& alloc) { |
| 3349 | MDefinition* def = input(); |
| 3350 | if (def->isConstant()) { |
| 3351 | int32_t i = def->toConstant()->toInt32(); |
| 3352 | return MConstant::NewIntPtr(alloc, intptr_t(i)); |
| 3353 | } |
| 3354 | |
| 3355 | if (def->isNonNegativeIntPtrToInt32()) { |
| 3356 | return def->toNonNegativeIntPtrToInt32()->input(); |
| 3357 | } |
| 3358 | |
| 3359 | return this; |
| 3360 | } |
| 3361 | |
| 3362 | bool MAbs::fallible() const { |
| 3363 | return !implicitTruncate_ && (!range() || !range()->hasInt32Bounds()); |
| 3364 | } |
| 3365 | |
| 3366 | void MAbs::trySpecializeFloat32(TempAllocator& alloc) { |
| 3367 | // Do not use Float32 if we can use int32. |
| 3368 | if (input()->type() == MIRType::Int32) { |
| 3369 | return; |
| 3370 | } |
| 3371 | |
| 3372 | if (EnsureFloatConsumersAndInputOrConvert(this, alloc)) { |
| 3373 | setResultType(MIRType::Float32); |
| 3374 | } |
| 3375 | } |
| 3376 | |
| 3377 | MDefinition* MDiv::foldsTo(TempAllocator& alloc) { |
| 3378 | MOZ_ASSERT(IsNumberType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNumberType(type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsNumberType(type())))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IsNumberType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3378); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNumberType(type())" ")"); do { *((volatile int*)__null) = 3378; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3379 | |
| 3380 | if (type() == MIRType::Int64) { |
| 3381 | if (MDefinition* folded = EvaluateInt64ConstantOperands(alloc, this)) { |
| 3382 | return folded; |
| 3383 | } |
| 3384 | return this; |
| 3385 | } |
| 3386 | |
| 3387 | if (MDefinition* folded = EvaluateConstantOperands(alloc, this)) { |
| 3388 | return folded; |
| 3389 | } |
| 3390 | |
| 3391 | if (MDefinition* folded = EvaluateExactReciprocal(alloc, this)) { |
| 3392 | return folded; |
| 3393 | } |
| 3394 | |
| 3395 | return this; |
| 3396 | } |
| 3397 | |
| 3398 | void MDiv::analyzeEdgeCasesForward() { |
| 3399 | // This is only meaningful when doing integer division. |
| 3400 | if (type() != MIRType::Int32) { |
| 3401 | return; |
| 3402 | } |
| 3403 | |
| 3404 | MOZ_ASSERT(lhs()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs()->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs()->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("lhs()->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3404); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3404; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3405 | MOZ_ASSERT(rhs()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs()->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(rhs()->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("rhs()->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3405); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3405; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3406 | |
| 3407 | // Try removing divide by zero check |
| 3408 | if (rhs()->isConstant() && !rhs()->toConstant()->isInt32(0)) { |
| 3409 | canBeDivideByZero_ = false; |
| 3410 | } |
| 3411 | |
| 3412 | // If lhs is a constant int != INT32_MIN, then |
| 3413 | // negative overflow check can be skipped. |
| 3414 | if (lhs()->isConstant() && !lhs()->toConstant()->isInt32(INT32_MIN(-2147483647-1))) { |
| 3415 | canBeNegativeOverflow_ = false; |
| 3416 | } |
| 3417 | |
| 3418 | // If rhs is a constant int != -1, likewise. |
| 3419 | if (rhs()->isConstant() && !rhs()->toConstant()->isInt32(-1)) { |
| 3420 | canBeNegativeOverflow_ = false; |
| 3421 | } |
| 3422 | |
| 3423 | // If lhs is != 0, then negative zero check can be skipped. |
| 3424 | if (lhs()->isConstant() && !lhs()->toConstant()->isInt32(0)) { |
| 3425 | setCanBeNegativeZero(false); |
| 3426 | } |
| 3427 | |
| 3428 | // If rhs is >= 0, likewise. |
| 3429 | if (rhs()->isConstant() && rhs()->type() == MIRType::Int32) { |
| 3430 | if (rhs()->toConstant()->toInt32() >= 0) { |
| 3431 | setCanBeNegativeZero(false); |
| 3432 | } |
| 3433 | } |
| 3434 | } |
| 3435 | |
| 3436 | void MDiv::analyzeEdgeCasesBackward() { |
| 3437 | if (canBeNegativeZero() && !NeedNegativeZeroCheck(this)) { |
| 3438 | setCanBeNegativeZero(false); |
| 3439 | } |
| 3440 | } |
| 3441 | |
| 3442 | bool MDiv::fallible() const { return !isTruncated(); } |
| 3443 | |
| 3444 | MDefinition* MMod::foldsTo(TempAllocator& alloc) { |
| 3445 | MOZ_ASSERT(IsNumberType(type()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNumberType(type()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsNumberType(type())))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IsNumberType(type())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3445); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNumberType(type())" ")"); do { *((volatile int*)__null) = 3445; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3446 | |
| 3447 | if (type() == MIRType::Int64) { |
| 3448 | if (MDefinition* folded = EvaluateInt64ConstantOperands(alloc, this)) { |
| 3449 | return folded; |
| 3450 | } |
| 3451 | } else { |
| 3452 | if (MDefinition* folded = EvaluateConstantOperands(alloc, this)) { |
| 3453 | return folded; |
| 3454 | } |
| 3455 | } |
| 3456 | return this; |
| 3457 | } |
| 3458 | |
| 3459 | void MMod::analyzeEdgeCasesForward() { |
| 3460 | // These optimizations make sense only for integer division |
| 3461 | if (type() != MIRType::Int32) { |
| 3462 | return; |
| 3463 | } |
| 3464 | |
| 3465 | if (rhs()->isConstant() && !rhs()->toConstant()->isInt32(0)) { |
| 3466 | canBeDivideByZero_ = false; |
| 3467 | } |
| 3468 | |
| 3469 | if (rhs()->isConstant()) { |
| 3470 | int32_t n = rhs()->toConstant()->toInt32(); |
| 3471 | if (n > 0 && !IsPowerOfTwo(uint32_t(n))) { |
| 3472 | canBePowerOfTwoDivisor_ = false; |
| 3473 | } |
| 3474 | } |
| 3475 | } |
| 3476 | |
| 3477 | bool MMod::fallible() const { |
| 3478 | return !isTruncated() && |
| 3479 | (isUnsigned() || canBeDivideByZero() || canBeNegativeDividend()); |
| 3480 | } |
| 3481 | |
| 3482 | void MMathFunction::trySpecializeFloat32(TempAllocator& alloc) { |
| 3483 | if (EnsureFloatConsumersAndInputOrConvert(this, alloc)) { |
| 3484 | setResultType(MIRType::Float32); |
| 3485 | specialization_ = MIRType::Float32; |
| 3486 | } |
| 3487 | } |
| 3488 | |
| 3489 | bool MMathFunction::isFloat32Commutative() const { |
| 3490 | switch (function_) { |
| 3491 | case UnaryMathFunction::Floor: |
| 3492 | case UnaryMathFunction::Ceil: |
| 3493 | case UnaryMathFunction::Round: |
| 3494 | case UnaryMathFunction::Trunc: |
| 3495 | return true; |
| 3496 | default: |
| 3497 | return false; |
| 3498 | } |
| 3499 | } |
| 3500 | |
| 3501 | MHypot* MHypot::New(TempAllocator& alloc, const MDefinitionVector& vector) { |
| 3502 | uint32_t length = vector.length(); |
| 3503 | MHypot* hypot = new (alloc) MHypot; |
| 3504 | if (!hypot->init(alloc, length)) { |
| 3505 | return nullptr; |
| 3506 | } |
| 3507 | |
| 3508 | for (uint32_t i = 0; i < length; ++i) { |
| 3509 | hypot->initOperand(i, vector[i]); |
| 3510 | } |
| 3511 | return hypot; |
| 3512 | } |
| 3513 | |
| 3514 | bool MAdd::fallible() const { |
| 3515 | // the add is fallible if range analysis does not say that it is finite, AND |
| 3516 | // either the truncation analysis shows that there are non-truncated uses. |
| 3517 | if (truncateKind() >= TruncateKind::IndirectTruncate) { |
| 3518 | return false; |
| 3519 | } |
| 3520 | if (range() && range()->hasInt32Bounds()) { |
| 3521 | return false; |
| 3522 | } |
| 3523 | return true; |
| 3524 | } |
| 3525 | |
| 3526 | bool MSub::fallible() const { |
| 3527 | // see comment in MAdd::fallible() |
| 3528 | if (truncateKind() >= TruncateKind::IndirectTruncate) { |
| 3529 | return false; |
| 3530 | } |
| 3531 | if (range() && range()->hasInt32Bounds()) { |
| 3532 | return false; |
| 3533 | } |
| 3534 | return true; |
| 3535 | } |
| 3536 | |
| 3537 | MDefinition* MSub::foldsTo(TempAllocator& alloc) { |
| 3538 | MDefinition* out = MBinaryArithInstruction::foldsTo(alloc); |
| 3539 | if (out != this) { |
| 3540 | return out; |
| 3541 | } |
| 3542 | |
| 3543 | if (type() != MIRType::Int32) { |
| 3544 | return this; |
| 3545 | } |
| 3546 | |
| 3547 | // Optimize X - X to 0. This optimization is only valid for Int32 |
| 3548 | // values. Subtracting a floating point value from itself returns |
| 3549 | // NaN when the operand is either Infinity or NaN. |
| 3550 | if (lhs() == rhs()) { |
| 3551 | // Ensure that any bailouts that we depend on to guarantee that X |
| 3552 | // is Int32 are not removed. |
| 3553 | lhs()->setGuardRangeBailoutsUnchecked(); |
| 3554 | return MConstant::New(alloc, Int32Value(0)); |
| 3555 | } |
| 3556 | |
| 3557 | return this; |
| 3558 | } |
| 3559 | |
| 3560 | MDefinition* MMul::foldsTo(TempAllocator& alloc) { |
| 3561 | MDefinition* out = MBinaryArithInstruction::foldsTo(alloc); |
| 3562 | if (out != this) { |
| 3563 | return out; |
| 3564 | } |
| 3565 | |
| 3566 | if (type() != MIRType::Int32) { |
| 3567 | return this; |
| 3568 | } |
| 3569 | |
| 3570 | if (lhs() == rhs()) { |
| 3571 | setCanBeNegativeZero(false); |
| 3572 | } |
| 3573 | |
| 3574 | return this; |
| 3575 | } |
| 3576 | |
| 3577 | void MMul::analyzeEdgeCasesForward() { |
| 3578 | // Try to remove the check for negative zero |
| 3579 | // This only makes sense when using the integer multiplication |
| 3580 | if (type() != MIRType::Int32) { |
| 3581 | return; |
| 3582 | } |
| 3583 | |
| 3584 | // If lhs is > 0, no need for negative zero check. |
| 3585 | if (lhs()->isConstant() && lhs()->type() == MIRType::Int32) { |
| 3586 | if (lhs()->toConstant()->toInt32() > 0) { |
| 3587 | setCanBeNegativeZero(false); |
| 3588 | } |
| 3589 | } |
| 3590 | |
| 3591 | // If rhs is > 0, likewise. |
| 3592 | if (rhs()->isConstant() && rhs()->type() == MIRType::Int32) { |
| 3593 | if (rhs()->toConstant()->toInt32() > 0) { |
| 3594 | setCanBeNegativeZero(false); |
| 3595 | } |
| 3596 | } |
| 3597 | } |
| 3598 | |
| 3599 | void MMul::analyzeEdgeCasesBackward() { |
| 3600 | if (canBeNegativeZero() && !NeedNegativeZeroCheck(this)) { |
| 3601 | setCanBeNegativeZero(false); |
| 3602 | } |
| 3603 | } |
| 3604 | |
| 3605 | bool MMul::canOverflow() const { |
| 3606 | if (isTruncated()) { |
| 3607 | return false; |
| 3608 | } |
| 3609 | return !range() || !range()->hasInt32Bounds(); |
| 3610 | } |
| 3611 | |
| 3612 | bool MUrsh::fallible() const { |
| 3613 | if (bailoutsDisabled()) { |
| 3614 | return false; |
| 3615 | } |
| 3616 | return !range() || !range()->hasInt32Bounds(); |
| 3617 | } |
| 3618 | |
| 3619 | MIRType MCompare::inputType() { |
| 3620 | switch (compareType_) { |
| 3621 | case Compare_Undefined: |
| 3622 | return MIRType::Undefined; |
| 3623 | case Compare_Null: |
| 3624 | return MIRType::Null; |
| 3625 | case Compare_UInt32: |
| 3626 | case Compare_Int32: |
| 3627 | return MIRType::Int32; |
| 3628 | case Compare_IntPtr: |
| 3629 | case Compare_UIntPtr: |
| 3630 | return MIRType::IntPtr; |
| 3631 | case Compare_Double: |
| 3632 | return MIRType::Double; |
| 3633 | case Compare_Float32: |
| 3634 | return MIRType::Float32; |
| 3635 | case Compare_String: |
| 3636 | return MIRType::String; |
| 3637 | case Compare_Symbol: |
| 3638 | return MIRType::Symbol; |
| 3639 | case Compare_Object: |
| 3640 | return MIRType::Object; |
| 3641 | case Compare_BigInt: |
| 3642 | case Compare_BigInt_Int32: |
| 3643 | case Compare_BigInt_Double: |
| 3644 | case Compare_BigInt_String: |
| 3645 | return MIRType::BigInt; |
| 3646 | default: |
| 3647 | MOZ_CRASH("No known conversion")do { do { } while (false); MOZ_ReportCrash("" "No known conversion" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3647); AnnotateMozCrashReason("MOZ_CRASH(" "No known conversion" ")"); do { *((volatile int*)__null) = 3647; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 3648 | } |
| 3649 | } |
| 3650 | |
| 3651 | static inline bool MustBeUInt32(MDefinition* def, MDefinition** pwrapped) { |
| 3652 | if (def->isUrsh()) { |
| 3653 | *pwrapped = def->toUrsh()->lhs(); |
| 3654 | MDefinition* rhs = def->toUrsh()->rhs(); |
| 3655 | return def->toUrsh()->bailoutsDisabled() && rhs->maybeConstantValue() && |
| 3656 | rhs->maybeConstantValue()->isInt32(0); |
| 3657 | } |
| 3658 | |
| 3659 | if (MConstant* defConst = def->maybeConstantValue()) { |
| 3660 | *pwrapped = defConst; |
| 3661 | return defConst->type() == MIRType::Int32 && defConst->toInt32() >= 0; |
| 3662 | } |
| 3663 | |
| 3664 | *pwrapped = nullptr; // silence GCC warning |
| 3665 | return false; |
| 3666 | } |
| 3667 | |
| 3668 | /* static */ |
| 3669 | bool MBinaryInstruction::unsignedOperands(MDefinition* left, |
| 3670 | MDefinition* right) { |
| 3671 | MDefinition* replace; |
| 3672 | if (!MustBeUInt32(left, &replace)) { |
| 3673 | return false; |
| 3674 | } |
| 3675 | if (replace->type() != MIRType::Int32) { |
| 3676 | return false; |
| 3677 | } |
| 3678 | if (!MustBeUInt32(right, &replace)) { |
| 3679 | return false; |
| 3680 | } |
| 3681 | if (replace->type() != MIRType::Int32) { |
| 3682 | return false; |
| 3683 | } |
| 3684 | return true; |
| 3685 | } |
| 3686 | |
| 3687 | bool MBinaryInstruction::unsignedOperands() { |
| 3688 | return unsignedOperands(getOperand(0), getOperand(1)); |
| 3689 | } |
| 3690 | |
| 3691 | void MBinaryInstruction::replaceWithUnsignedOperands() { |
| 3692 | MOZ_ASSERT(unsignedOperands())do { static_assert( mozilla::detail::AssertionConditionType< decltype(unsignedOperands())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(unsignedOperands()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("unsignedOperands()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3692); AnnotateMozCrashReason("MOZ_ASSERT" "(" "unsignedOperands()" ")"); do { *((volatile int*)__null) = 3692; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3693 | |
| 3694 | for (size_t i = 0; i < numOperands(); i++) { |
| 3695 | MDefinition* replace; |
| 3696 | MustBeUInt32(getOperand(i), &replace); |
| 3697 | if (replace == getOperand(i)) { |
| 3698 | continue; |
| 3699 | } |
| 3700 | |
| 3701 | getOperand(i)->setImplicitlyUsedUnchecked(); |
| 3702 | replaceOperand(i, replace); |
| 3703 | } |
| 3704 | } |
| 3705 | |
| 3706 | MDefinition* MBitNot::foldsTo(TempAllocator& alloc) { |
| 3707 | if (type() == MIRType::Int64) { |
| 3708 | return this; |
| 3709 | } |
| 3710 | MOZ_ASSERT(type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3710); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3710; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3711 | |
| 3712 | MDefinition* input = getOperand(0); |
| 3713 | |
| 3714 | if (input->isConstant()) { |
| 3715 | js::Value v = Int32Value(~(input->toConstant()->toInt32())); |
| 3716 | return MConstant::New(alloc, v); |
| 3717 | } |
| 3718 | |
| 3719 | if (input->isBitNot()) { |
| 3720 | MOZ_ASSERT(input->toBitNot()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input->toBitNot()->type() == MIRType::Int32)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(input->toBitNot()->type() == MIRType::Int32))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("input->toBitNot()->type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3720); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input->toBitNot()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3720; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3721 | MOZ_ASSERT(input->toBitNot()->getOperand(0)->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input->toBitNot()->getOperand(0)->type() == MIRType::Int32)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(input->toBitNot()->getOperand (0)->type() == MIRType::Int32))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("input->toBitNot()->getOperand(0)->type() == MIRType::Int32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3721); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input->toBitNot()->getOperand(0)->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3721; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3722 | return MTruncateToInt32::New(alloc, |
| 3723 | input->toBitNot()->input()); // ~~x => x | 0 |
| 3724 | } |
| 3725 | |
| 3726 | return this; |
| 3727 | } |
| 3728 | |
| 3729 | static void AssertKnownClass(TempAllocator& alloc, MInstruction* ins, |
| 3730 | MDefinition* obj) { |
| 3731 | #ifdef DEBUG1 |
| 3732 | const JSClass* clasp = GetObjectKnownJSClass(obj); |
| 3733 | MOZ_ASSERT(clasp)do { static_assert( mozilla::detail::AssertionConditionType< decltype(clasp)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(clasp))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("clasp", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3733); AnnotateMozCrashReason("MOZ_ASSERT" "(" "clasp" ")") ; do { *((volatile int*)__null) = 3733; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3734 | |
| 3735 | auto* assert = MAssertClass::New(alloc, obj, clasp); |
| 3736 | ins->block()->insertBefore(ins, assert); |
| 3737 | #endif |
| 3738 | } |
| 3739 | |
| 3740 | MDefinition* MBoxNonStrictThis::foldsTo(TempAllocator& alloc) { |
| 3741 | MDefinition* in = input(); |
| 3742 | if (in->isBox()) { |
| 3743 | in = in->toBox()->input(); |
| 3744 | } |
| 3745 | |
| 3746 | if (in->type() == MIRType::Object) { |
| 3747 | return in; |
| 3748 | } |
| 3749 | |
| 3750 | return this; |
| 3751 | } |
| 3752 | |
| 3753 | AliasSet MLoadArgumentsObjectArg::getAliasSet() const { |
| 3754 | return AliasSet::Load(AliasSet::Any); |
| 3755 | } |
| 3756 | |
| 3757 | AliasSet MLoadArgumentsObjectArgHole::getAliasSet() const { |
| 3758 | return AliasSet::Load(AliasSet::Any); |
| 3759 | } |
| 3760 | |
| 3761 | AliasSet MInArgumentsObjectArg::getAliasSet() const { |
| 3762 | // Loads |arguments.length|, but not the actual element, so we can use the |
| 3763 | // same alias-set as MArgumentsObjectLength. |
| 3764 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 3765 | AliasSet::DynamicSlot); |
| 3766 | } |
| 3767 | |
| 3768 | AliasSet MArgumentsObjectLength::getAliasSet() const { |
| 3769 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 3770 | AliasSet::DynamicSlot); |
| 3771 | } |
| 3772 | |
| 3773 | bool MGuardArgumentsObjectFlags::congruentTo(const MDefinition* ins) const { |
| 3774 | if (!ins->isGuardArgumentsObjectFlags() || |
| 3775 | ins->toGuardArgumentsObjectFlags()->flags() != flags()) { |
| 3776 | return false; |
| 3777 | } |
| 3778 | return congruentIfOperandsEqual(ins); |
| 3779 | } |
| 3780 | |
| 3781 | AliasSet MGuardArgumentsObjectFlags::getAliasSet() const { |
| 3782 | // The flags are packed with the length in a fixed private slot. |
| 3783 | return AliasSet::Load(AliasSet::FixedSlot); |
| 3784 | } |
| 3785 | |
| 3786 | MDefinition* MIdToStringOrSymbol::foldsTo(TempAllocator& alloc) { |
| 3787 | if (idVal()->isBox()) { |
| 3788 | auto* input = idVal()->toBox()->input(); |
| 3789 | MIRType idType = input->type(); |
| 3790 | if (idType == MIRType::String || idType == MIRType::Symbol) { |
| 3791 | return idVal(); |
| 3792 | } |
| 3793 | if (idType == MIRType::Int32) { |
| 3794 | auto* toString = |
| 3795 | MToString::New(alloc, input, MToString::SideEffectHandling::Bailout); |
| 3796 | block()->insertBefore(this, toString); |
| 3797 | |
| 3798 | return MBox::New(alloc, toString); |
| 3799 | } |
| 3800 | } |
| 3801 | |
| 3802 | return this; |
| 3803 | } |
| 3804 | |
| 3805 | MDefinition* MReturnFromCtor::foldsTo(TempAllocator& alloc) { |
| 3806 | MDefinition* rval = value(); |
| 3807 | if (rval->isBox()) { |
| 3808 | rval = rval->toBox()->input(); |
| 3809 | } |
| 3810 | |
| 3811 | if (rval->type() == MIRType::Object) { |
| 3812 | return rval; |
| 3813 | } |
| 3814 | |
| 3815 | if (rval->type() != MIRType::Value) { |
| 3816 | return object(); |
| 3817 | } |
| 3818 | |
| 3819 | return this; |
| 3820 | } |
| 3821 | |
| 3822 | MDefinition* MTypeOf::foldsTo(TempAllocator& alloc) { |
| 3823 | MDefinition* unboxed = input(); |
| 3824 | if (unboxed->isBox()) { |
| 3825 | unboxed = unboxed->toBox()->input(); |
| 3826 | } |
| 3827 | |
| 3828 | JSType type; |
| 3829 | switch (unboxed->type()) { |
| 3830 | case MIRType::Double: |
| 3831 | case MIRType::Float32: |
| 3832 | case MIRType::Int32: |
| 3833 | type = JSTYPE_NUMBER; |
| 3834 | break; |
| 3835 | case MIRType::String: |
| 3836 | type = JSTYPE_STRING; |
| 3837 | break; |
| 3838 | case MIRType::Symbol: |
| 3839 | type = JSTYPE_SYMBOL; |
| 3840 | break; |
| 3841 | case MIRType::BigInt: |
| 3842 | type = JSTYPE_BIGINT; |
| 3843 | break; |
| 3844 | case MIRType::Null: |
| 3845 | type = JSTYPE_OBJECT; |
| 3846 | break; |
| 3847 | case MIRType::Undefined: |
| 3848 | type = JSTYPE_UNDEFINED; |
| 3849 | break; |
| 3850 | case MIRType::Boolean: |
| 3851 | type = JSTYPE_BOOLEAN; |
| 3852 | break; |
| 3853 | case MIRType::Object: { |
| 3854 | KnownClass known = GetObjectKnownClass(unboxed); |
| 3855 | if (known != KnownClass::None) { |
| 3856 | if (known == KnownClass::Function) { |
| 3857 | type = JSTYPE_FUNCTION; |
| 3858 | } else { |
| 3859 | type = JSTYPE_OBJECT; |
| 3860 | } |
| 3861 | |
| 3862 | AssertKnownClass(alloc, this, unboxed); |
| 3863 | break; |
| 3864 | } |
| 3865 | [[fallthrough]]; |
| 3866 | } |
| 3867 | default: |
| 3868 | return this; |
| 3869 | } |
| 3870 | |
| 3871 | return MConstant::New(alloc, Int32Value(static_cast<int32_t>(type))); |
| 3872 | } |
| 3873 | |
| 3874 | MDefinition* MTypeOfName::foldsTo(TempAllocator& alloc) { |
| 3875 | MOZ_ASSERT(input()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input()->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(input()->type() == MIRType ::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("input()->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3875); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 3875; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3876 | |
| 3877 | if (!input()->isConstant()) { |
| 3878 | return this; |
| 3879 | } |
| 3880 | |
| 3881 | static_assert(JSTYPE_UNDEFINED == 0); |
| 3882 | |
| 3883 | int32_t type = input()->toConstant()->toInt32(); |
| 3884 | MOZ_ASSERT(JSTYPE_UNDEFINED <= type && type < JSTYPE_LIMIT)do { static_assert( mozilla::detail::AssertionConditionType< decltype(JSTYPE_UNDEFINED <= type && type < JSTYPE_LIMIT )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(JSTYPE_UNDEFINED <= type && type < JSTYPE_LIMIT ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "JSTYPE_UNDEFINED <= type && type < JSTYPE_LIMIT" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3884); AnnotateMozCrashReason("MOZ_ASSERT" "(" "JSTYPE_UNDEFINED <= type && type < JSTYPE_LIMIT" ")"); do { *((volatile int*)__null) = 3884; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3885 | |
| 3886 | JSString* name = |
| 3887 | TypeName(static_cast<JSType>(type), GetJitContext()->runtime->names()); |
| 3888 | return MConstant::New(alloc, StringValue(name)); |
| 3889 | } |
| 3890 | |
| 3891 | MUrsh* MUrsh::NewWasm(TempAllocator& alloc, MDefinition* left, |
| 3892 | MDefinition* right, MIRType type) { |
| 3893 | MUrsh* ins = new (alloc) MUrsh(left, right, type); |
| 3894 | |
| 3895 | // Since Ion has no UInt32 type, we use Int32 and we have a special |
| 3896 | // exception to the type rules: we can return values in |
| 3897 | // (INT32_MIN,UINT32_MAX] and still claim that we have an Int32 type |
| 3898 | // without bailing out. This is necessary because Ion has no UInt32 |
| 3899 | // type and we can't have bailouts in wasm code. |
| 3900 | ins->bailoutsDisabled_ = true; |
| 3901 | |
| 3902 | return ins; |
| 3903 | } |
| 3904 | |
| 3905 | MResumePoint* MResumePoint::New(TempAllocator& alloc, MBasicBlock* block, |
| 3906 | jsbytecode* pc, ResumeMode mode) { |
| 3907 | MResumePoint* resume = new (alloc) MResumePoint(block, pc, mode); |
| 3908 | if (!resume->init(alloc)) { |
| 3909 | block->discardPreAllocatedResumePoint(resume); |
| 3910 | return nullptr; |
| 3911 | } |
| 3912 | resume->inherit(block); |
| 3913 | return resume; |
| 3914 | } |
| 3915 | |
| 3916 | MResumePoint::MResumePoint(MBasicBlock* block, jsbytecode* pc, ResumeMode mode) |
| 3917 | : MNode(block, Kind::ResumePoint), |
| 3918 | pc_(pc), |
| 3919 | instruction_(nullptr), |
| 3920 | mode_(mode) { |
| 3921 | block->addResumePoint(this); |
| 3922 | } |
| 3923 | |
| 3924 | bool MResumePoint::init(TempAllocator& alloc) { |
| 3925 | return operands_.init(alloc, block()->stackDepth()); |
| 3926 | } |
| 3927 | |
| 3928 | MResumePoint* MResumePoint::caller() const { |
| 3929 | return block()->callerResumePoint(); |
| 3930 | } |
| 3931 | |
| 3932 | void MResumePoint::inherit(MBasicBlock* block) { |
| 3933 | // FixedList doesn't initialize its elements, so do unchecked inits. |
| 3934 | for (size_t i = 0; i < stackDepth(); i++) { |
| 3935 | initOperand(i, block->getSlot(i)); |
| 3936 | } |
| 3937 | } |
| 3938 | |
| 3939 | void MResumePoint::addStore(TempAllocator& alloc, MDefinition* store, |
| 3940 | const MResumePoint* cache) { |
| 3941 | MOZ_ASSERT(block()->outerResumePoint() != this)do { static_assert( mozilla::detail::AssertionConditionType< decltype(block()->outerResumePoint() != this)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(block()->outerResumePoint() != this))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("block()->outerResumePoint() != this" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3941); AnnotateMozCrashReason("MOZ_ASSERT" "(" "block()->outerResumePoint() != this" ")"); do { *((volatile int*)__null) = 3941; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3942 | MOZ_ASSERT_IF(cache, !cache->stores_.empty())do { if (cache) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!cache->stores_.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cache->stores_.empty())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!cache->stores_.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3942); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cache->stores_.empty()" ")"); do { *((volatile int*)__null) = 3942; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 3943 | |
| 3944 | if (cache && cache->stores_.begin()->operand == store) { |
| 3945 | // If the last resume point had the same side-effect stack, then we can |
| 3946 | // reuse the current side effect without cloning it. This is a simple |
| 3947 | // way to share common context by making a spaghetti stack. |
| 3948 | if (++cache->stores_.begin() == stores_.begin()) { |
| 3949 | stores_.copy(cache->stores_); |
| 3950 | return; |
| 3951 | } |
| 3952 | } |
| 3953 | |
| 3954 | // Ensure that the store would not be deleted by DCE. |
| 3955 | MOZ_ASSERT(store->isEffectful())do { static_assert( mozilla::detail::AssertionConditionType< decltype(store->isEffectful())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(store->isEffectful()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("store->isEffectful()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 3955); AnnotateMozCrashReason("MOZ_ASSERT" "(" "store->isEffectful()" ")"); do { *((volatile int*)__null) = 3955; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3956 | |
| 3957 | MStoreToRecover* top = new (alloc) MStoreToRecover(store); |
| 3958 | stores_.push(top); |
| 3959 | } |
| 3960 | |
| 3961 | #ifdef JS_JITSPEW1 |
| 3962 | void MResumePoint::dump(GenericPrinter& out) const { |
| 3963 | out.printf("resumepoint mode="); |
| 3964 | |
| 3965 | switch (mode()) { |
| 3966 | case ResumeMode::ResumeAt: |
| 3967 | if (instruction_) { |
| 3968 | out.printf("ResumeAt(%u)", instruction_->id()); |
| 3969 | } else { |
| 3970 | out.printf("ResumeAt"); |
| 3971 | } |
| 3972 | break; |
| 3973 | default: |
| 3974 | out.put(ResumeModeToString(mode())); |
| 3975 | break; |
| 3976 | } |
| 3977 | |
| 3978 | if (MResumePoint* c = caller()) { |
| 3979 | out.printf(" (caller in block%u)", c->block()->id()); |
| 3980 | } |
| 3981 | |
| 3982 | for (size_t i = 0; i < numOperands(); i++) { |
| 3983 | out.printf(" "); |
| 3984 | if (operands_[i].hasProducer()) { |
| 3985 | getOperand(i)->printName(out); |
| 3986 | } else { |
| 3987 | out.printf("(null)"); |
| 3988 | } |
| 3989 | } |
| 3990 | out.printf("\n"); |
| 3991 | } |
| 3992 | |
| 3993 | void MResumePoint::dump() const { |
| 3994 | Fprinter out(stderrstderr); |
| 3995 | dump(out); |
| 3996 | out.finish(); |
| 3997 | } |
| 3998 | #endif |
| 3999 | |
| 4000 | bool MResumePoint::isObservableOperand(MUse* u) const { |
| 4001 | return isObservableOperand(indexOf(u)); |
| 4002 | } |
| 4003 | |
| 4004 | bool MResumePoint::isObservableOperand(size_t index) const { |
| 4005 | return block()->info().isObservableSlot(index); |
| 4006 | } |
| 4007 | |
| 4008 | bool MResumePoint::isRecoverableOperand(MUse* u) const { |
| 4009 | return block()->info().isRecoverableOperand(indexOf(u)); |
| 4010 | } |
| 4011 | |
| 4012 | MDefinition* MBigIntToIntPtr::foldsTo(TempAllocator& alloc) { |
| 4013 | MDefinition* def = input(); |
| 4014 | |
| 4015 | // If the operand converts an IntPtr to BigInt, drop both conversions. |
| 4016 | if (def->isIntPtrToBigInt()) { |
| 4017 | return def->toIntPtrToBigInt()->input(); |
| 4018 | } |
| 4019 | |
| 4020 | // Fold this operation if the input operand is constant. |
| 4021 | if (def->isConstant()) { |
| 4022 | BigInt* bigInt = def->toConstant()->toBigInt(); |
| 4023 | intptr_t i; |
| 4024 | if (BigInt::isIntPtr(bigInt, &i)) { |
| 4025 | return MConstant::NewIntPtr(alloc, i); |
| 4026 | } |
| 4027 | } |
| 4028 | |
| 4029 | // Fold BigIntToIntPtr(Int64ToBigInt(int64)) to Int64ToIntPtr(int64) |
| 4030 | if (def->isInt64ToBigInt()) { |
| 4031 | auto* toBigInt = def->toInt64ToBigInt(); |
| 4032 | return MInt64ToIntPtr::New(alloc, toBigInt->input(), |
| 4033 | toBigInt->elementType()); |
| 4034 | } |
| 4035 | |
| 4036 | return this; |
| 4037 | } |
| 4038 | |
| 4039 | MDefinition* MIntPtrToBigInt::foldsTo(TempAllocator& alloc) { |
| 4040 | MDefinition* def = input(); |
| 4041 | |
| 4042 | // If the operand converts a BigInt to IntPtr, drop both conversions. |
| 4043 | if (def->isBigIntToIntPtr()) { |
| 4044 | return def->toBigIntToIntPtr()->input(); |
| 4045 | } |
| 4046 | |
| 4047 | return this; |
| 4048 | } |
| 4049 | |
| 4050 | MDefinition* MTruncateBigIntToInt64::foldsTo(TempAllocator& alloc) { |
| 4051 | MDefinition* input = getOperand(0); |
| 4052 | |
| 4053 | if (input->isBox()) { |
| 4054 | input = input->getOperand(0); |
| 4055 | } |
| 4056 | |
| 4057 | // If the operand converts an I64 to BigInt, drop both conversions. |
| 4058 | if (input->isInt64ToBigInt()) { |
| 4059 | return input->getOperand(0); |
| 4060 | } |
| 4061 | |
| 4062 | // If the operand converts an I32 to BigInt, extend the I32 to I64. |
| 4063 | if (input->isInt32ToBigInt()) { |
| 4064 | auto* int32 = input->toInt32ToBigInt()->input(); |
| 4065 | if (int32->isConstant()) { |
| 4066 | int32_t c = int32->toConstant()->toInt32(); |
| 4067 | return MConstant::NewInt64(alloc, int64_t(c)); |
| 4068 | } |
| 4069 | return MExtendInt32ToInt64::New(alloc, int32, /* isUnsigned = */ false); |
| 4070 | } |
| 4071 | |
| 4072 | // If the operand is an IntPtr, extend the IntPtr to I64. |
| 4073 | if (input->isIntPtrToBigInt()) { |
| 4074 | auto* intPtr = input->toIntPtrToBigInt()->input(); |
| 4075 | return MIntPtrToInt64::New(alloc, intPtr); |
| 4076 | } |
| 4077 | |
| 4078 | // Fold this operation if the input operand is constant. |
| 4079 | if (input->isConstant()) { |
| 4080 | return MConstant::NewInt64( |
| 4081 | alloc, BigInt::toInt64(input->toConstant()->toBigInt())); |
| 4082 | } |
| 4083 | |
| 4084 | return this; |
| 4085 | } |
| 4086 | |
| 4087 | MDefinition* MToInt64::foldsTo(TempAllocator& alloc) { |
| 4088 | MDefinition* input = getOperand(0); |
| 4089 | |
| 4090 | if (input->isBox()) { |
| 4091 | input = input->getOperand(0); |
| 4092 | } |
| 4093 | |
| 4094 | // Unwrap MInt64ToBigInt: MToInt64(MInt64ToBigInt(int64)) = int64. |
| 4095 | if (input->isInt64ToBigInt()) { |
| 4096 | return input->getOperand(0); |
| 4097 | } |
| 4098 | |
| 4099 | // Unwrap Int32ToBigInt: |
| 4100 | // MToInt64(MInt32ToBigInt(int32)) = MExtendInt32ToInt64(int32). |
| 4101 | if (input->isInt32ToBigInt()) { |
| 4102 | auto* int32 = input->toInt32ToBigInt()->input(); |
| 4103 | if (int32->isConstant()) { |
| 4104 | int32_t c = int32->toConstant()->toInt32(); |
| 4105 | return MConstant::NewInt64(alloc, int64_t(c)); |
| 4106 | } |
| 4107 | return MExtendInt32ToInt64::New(alloc, int32, /* isUnsigned = */ false); |
| 4108 | } |
| 4109 | |
| 4110 | // When the input is an Int64 already, just return it. |
| 4111 | if (input->type() == MIRType::Int64) { |
| 4112 | return input; |
| 4113 | } |
| 4114 | |
| 4115 | // Fold this operation if the input operand is constant. |
| 4116 | if (input->isConstant()) { |
| 4117 | switch (input->type()) { |
| 4118 | case MIRType::Boolean: |
| 4119 | return MConstant::NewInt64(alloc, input->toConstant()->toBoolean()); |
| 4120 | default: |
| 4121 | break; |
| 4122 | } |
| 4123 | } |
| 4124 | |
| 4125 | return this; |
| 4126 | } |
| 4127 | |
| 4128 | MDefinition* MToNumberInt32::foldsTo(TempAllocator& alloc) { |
| 4129 | // Fold this operation if the input operand is constant. |
| 4130 | if (MConstant* cst = input()->maybeConstantValue()) { |
| 4131 | switch (cst->type()) { |
| 4132 | case MIRType::Null: |
| 4133 | if (conversion() == IntConversionInputKind::Any) { |
| 4134 | return MConstant::New(alloc, Int32Value(0)); |
| 4135 | } |
| 4136 | break; |
| 4137 | case MIRType::Boolean: |
| 4138 | if (conversion() == IntConversionInputKind::Any) { |
| 4139 | return MConstant::New(alloc, Int32Value(cst->toBoolean())); |
| 4140 | } |
| 4141 | break; |
| 4142 | case MIRType::Int32: |
| 4143 | return MConstant::New(alloc, Int32Value(cst->toInt32())); |
| 4144 | case MIRType::Float32: |
| 4145 | case MIRType::Double: |
| 4146 | int32_t ival; |
| 4147 | // Only the value within the range of Int32 can be substituted as |
| 4148 | // constant. |
| 4149 | if (mozilla::NumberIsInt32(cst->numberToDouble(), &ival)) { |
| 4150 | return MConstant::New(alloc, Int32Value(ival)); |
| 4151 | } |
| 4152 | break; |
| 4153 | default: |
| 4154 | break; |
| 4155 | } |
| 4156 | } |
| 4157 | |
| 4158 | MDefinition* input = getOperand(0); |
| 4159 | if (input->isBox()) { |
| 4160 | input = input->toBox()->input(); |
| 4161 | } |
| 4162 | |
| 4163 | // Do not fold the TruncateToInt32 node when the input is uint32 (e.g. ursh |
| 4164 | // with a zero constant. Consider the test jit-test/tests/ion/bug1247880.js, |
| 4165 | // where the relevant code is: |(imul(1, x >>> 0) % 2)|. The imul operator |
| 4166 | // is folded to a MTruncateToInt32 node, which will result in this MIR: |
| 4167 | // MMod(MTruncateToInt32(MUrsh(x, MConstant(0))), MConstant(2)). Note that |
| 4168 | // the MUrsh node's type is int32 (since uint32 is not implemented), and |
| 4169 | // that would fold the MTruncateToInt32 node. This will make the modulo |
| 4170 | // unsigned, while is should have been signed. |
| 4171 | if (input->type() == MIRType::Int32 && !IsUint32Type(input)) { |
| 4172 | return input; |
| 4173 | } |
| 4174 | |
| 4175 | return this; |
| 4176 | } |
| 4177 | |
| 4178 | MDefinition* MBooleanToInt32::foldsTo(TempAllocator& alloc) { |
| 4179 | MDefinition* input = getOperand(0); |
| 4180 | MOZ_ASSERT(input->type() == MIRType::Boolean)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input->type() == MIRType::Boolean)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(input->type() == MIRType:: Boolean))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("input->type() == MIRType::Boolean", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4180); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input->type() == MIRType::Boolean" ")"); do { *((volatile int*)__null) = 4180; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4181 | |
| 4182 | if (input->isConstant()) { |
| 4183 | return MConstant::New(alloc, Int32Value(input->toConstant()->toBoolean())); |
| 4184 | } |
| 4185 | |
| 4186 | return this; |
| 4187 | } |
| 4188 | |
| 4189 | void MToNumberInt32::analyzeEdgeCasesBackward() { |
| 4190 | if (!NeedNegativeZeroCheck(this)) { |
| 4191 | setNeedsNegativeZeroCheck(false); |
| 4192 | } |
| 4193 | } |
| 4194 | |
| 4195 | MDefinition* MTruncateToInt32::foldsTo(TempAllocator& alloc) { |
| 4196 | MDefinition* input = getOperand(0); |
| 4197 | if (input->isBox()) { |
| 4198 | input = input->getOperand(0); |
| 4199 | } |
| 4200 | |
| 4201 | // Do not fold the TruncateToInt32 node when the input is uint32 (e.g. ursh |
| 4202 | // with a zero constant. Consider the test jit-test/tests/ion/bug1247880.js, |
| 4203 | // where the relevant code is: |(imul(1, x >>> 0) % 2)|. The imul operator |
| 4204 | // is folded to a MTruncateToInt32 node, which will result in this MIR: |
| 4205 | // MMod(MTruncateToInt32(MUrsh(x, MConstant(0))), MConstant(2)). Note that |
| 4206 | // the MUrsh node's type is int32 (since uint32 is not implemented), and |
| 4207 | // that would fold the MTruncateToInt32 node. This will make the modulo |
| 4208 | // unsigned, while is should have been signed. |
| 4209 | if (input->type() == MIRType::Int32 && !IsUint32Type(input)) { |
| 4210 | return input; |
| 4211 | } |
| 4212 | |
| 4213 | if (input->type() == MIRType::Double && input->isConstant()) { |
| 4214 | int32_t ret = ToInt32(input->toConstant()->toDouble()); |
| 4215 | return MConstant::New(alloc, Int32Value(ret)); |
| 4216 | } |
| 4217 | |
| 4218 | return this; |
| 4219 | } |
| 4220 | |
| 4221 | MDefinition* MWrapInt64ToInt32::foldsTo(TempAllocator& alloc) { |
| 4222 | MDefinition* input = this->input(); |
| 4223 | if (input->isConstant()) { |
| 4224 | uint64_t c = input->toConstant()->toInt64(); |
| 4225 | int32_t output = bottomHalf() ? int32_t(c) : int32_t(c >> 32); |
| 4226 | return MConstant::New(alloc, Int32Value(output)); |
| 4227 | } |
| 4228 | |
| 4229 | return this; |
| 4230 | } |
| 4231 | |
| 4232 | MDefinition* MExtendInt32ToInt64::foldsTo(TempAllocator& alloc) { |
| 4233 | MDefinition* input = this->input(); |
| 4234 | if (input->isConstant()) { |
| 4235 | int32_t c = input->toConstant()->toInt32(); |
| 4236 | int64_t res = isUnsigned() ? int64_t(uint32_t(c)) : int64_t(c); |
| 4237 | return MConstant::NewInt64(alloc, res); |
| 4238 | } |
| 4239 | |
| 4240 | return this; |
| 4241 | } |
| 4242 | |
| 4243 | MDefinition* MSignExtendInt32::foldsTo(TempAllocator& alloc) { |
| 4244 | MDefinition* input = this->input(); |
| 4245 | if (input->isConstant()) { |
| 4246 | int32_t c = input->toConstant()->toInt32(); |
| 4247 | int32_t res; |
| 4248 | switch (mode_) { |
| 4249 | case Byte: |
| 4250 | res = int32_t(int8_t(c & 0xFF)); |
| 4251 | break; |
| 4252 | case Half: |
| 4253 | res = int32_t(int16_t(c & 0xFFFF)); |
| 4254 | break; |
| 4255 | } |
| 4256 | return MConstant::New(alloc, Int32Value(res)); |
| 4257 | } |
| 4258 | |
| 4259 | return this; |
| 4260 | } |
| 4261 | |
| 4262 | MDefinition* MSignExtendInt64::foldsTo(TempAllocator& alloc) { |
| 4263 | MDefinition* input = this->input(); |
| 4264 | if (input->isConstant()) { |
| 4265 | int64_t c = input->toConstant()->toInt64(); |
| 4266 | int64_t res; |
| 4267 | switch (mode_) { |
| 4268 | case Byte: |
| 4269 | res = int64_t(int8_t(c & 0xFF)); |
| 4270 | break; |
| 4271 | case Half: |
| 4272 | res = int64_t(int16_t(c & 0xFFFF)); |
| 4273 | break; |
| 4274 | case Word: |
| 4275 | res = int64_t(int32_t(c & 0xFFFFFFFFU)); |
| 4276 | break; |
| 4277 | } |
| 4278 | return MConstant::NewInt64(alloc, res); |
| 4279 | } |
| 4280 | |
| 4281 | return this; |
| 4282 | } |
| 4283 | |
| 4284 | MDefinition* MToDouble::foldsTo(TempAllocator& alloc) { |
| 4285 | MDefinition* input = getOperand(0); |
| 4286 | if (input->isBox()) { |
| 4287 | input = input->getOperand(0); |
| 4288 | } |
| 4289 | |
| 4290 | if (input->type() == MIRType::Double) { |
| 4291 | return input; |
| 4292 | } |
| 4293 | |
| 4294 | if (input->isConstant() && |
| 4295 | input->toConstant()->isTypeRepresentableAsDouble()) { |
| 4296 | return MConstant::New(alloc, |
| 4297 | DoubleValue(input->toConstant()->numberToDouble())); |
| 4298 | } |
| 4299 | |
| 4300 | return this; |
| 4301 | } |
| 4302 | |
| 4303 | MDefinition* MToFloat32::foldsTo(TempAllocator& alloc) { |
| 4304 | MDefinition* input = getOperand(0); |
| 4305 | if (input->isBox()) { |
| 4306 | input = input->getOperand(0); |
| 4307 | } |
| 4308 | |
| 4309 | if (input->type() == MIRType::Float32) { |
| 4310 | return input; |
| 4311 | } |
| 4312 | |
| 4313 | // If x is a Float32, Float32(Double(x)) == x |
| 4314 | if (!mustPreserveNaN_ && input->isToDouble() && |
| 4315 | input->toToDouble()->input()->type() == MIRType::Float32) { |
| 4316 | return input->toToDouble()->input(); |
| 4317 | } |
| 4318 | |
| 4319 | if (input->isConstant() && |
| 4320 | input->toConstant()->isTypeRepresentableAsDouble()) { |
| 4321 | return MConstant::NewFloat32(alloc, |
| 4322 | float(input->toConstant()->numberToDouble())); |
| 4323 | } |
| 4324 | |
| 4325 | // Fold ToFloat32(ToDouble(int32)) to ToFloat32(int32). |
| 4326 | if (input->isToDouble() && |
| 4327 | input->toToDouble()->input()->type() == MIRType::Int32) { |
| 4328 | return MToFloat32::New(alloc, input->toToDouble()->input()); |
| 4329 | } |
| 4330 | |
| 4331 | return this; |
| 4332 | } |
| 4333 | |
| 4334 | MDefinition* MToFloat16::foldsTo(TempAllocator& alloc) { |
| 4335 | MDefinition* in = input(); |
| 4336 | if (in->isBox()) { |
| 4337 | in = in->toBox()->input(); |
| 4338 | } |
| 4339 | |
| 4340 | if (in->isConstant()) { |
| 4341 | auto* cst = in->toConstant(); |
| 4342 | if (cst->isTypeRepresentableAsDouble()) { |
| 4343 | double num = cst->numberToDouble(); |
| 4344 | return MConstant::NewFloat32(alloc, static_cast<float>(js::float16{num})); |
| 4345 | } |
| 4346 | } |
| 4347 | |
| 4348 | auto isFloat16 = [](auto* def) -> MDefinition* { |
| 4349 | // ToFloat16(ToDouble(float16)) => float16 |
| 4350 | // ToFloat16(ToFloat32(float16)) => float16 |
| 4351 | if (def->isToDouble()) { |
| 4352 | def = def->toToDouble()->input(); |
| 4353 | } else if (def->isToFloat32()) { |
| 4354 | def = def->toToFloat32()->input(); |
| 4355 | } |
| 4356 | |
| 4357 | // ToFloat16(ToFloat16(x)) => ToFloat16(x) |
| 4358 | if (def->isToFloat16()) { |
| 4359 | return def; |
| 4360 | } |
| 4361 | |
| 4362 | // ToFloat16(LoadFloat16(x)) => LoadFloat16(x) |
| 4363 | if (def->isLoadUnboxedScalar() && |
| 4364 | def->toLoadUnboxedScalar()->storageType() == Scalar::Float16) { |
| 4365 | return def; |
| 4366 | } |
| 4367 | if (def->isLoadDataViewElement() && |
| 4368 | def->toLoadDataViewElement()->storageType() == Scalar::Float16) { |
| 4369 | return def; |
| 4370 | } |
| 4371 | return nullptr; |
| 4372 | }; |
| 4373 | |
| 4374 | // Fold loads which are guaranteed to return Float16. |
| 4375 | if (auto* f16 = isFloat16(in)) { |
| 4376 | return f16; |
| 4377 | } |
| 4378 | |
| 4379 | // Fold ToFloat16(ToDouble(float32)) to ToFloat16(float32). |
| 4380 | // Fold ToFloat16(ToDouble(int32)) to ToFloat16(int32). |
| 4381 | if (in->isToDouble()) { |
| 4382 | auto* toDoubleInput = in->toToDouble()->input(); |
| 4383 | if (toDoubleInput->type() == MIRType::Float32 || |
| 4384 | toDoubleInput->type() == MIRType::Int32) { |
| 4385 | return MToFloat16::New(alloc, toDoubleInput); |
| 4386 | } |
| 4387 | } |
| 4388 | |
| 4389 | return this; |
| 4390 | } |
| 4391 | |
| 4392 | MDefinition* MToString::foldsTo(TempAllocator& alloc) { |
| 4393 | MDefinition* in = input(); |
| 4394 | if (in->isBox()) { |
| 4395 | in = in->getOperand(0); |
| 4396 | } |
| 4397 | |
| 4398 | if (in->type() == MIRType::String) { |
| 4399 | return in; |
| 4400 | } |
| 4401 | return this; |
| 4402 | } |
| 4403 | |
| 4404 | MDefinition* MClampToUint8::foldsTo(TempAllocator& alloc) { |
| 4405 | if (MConstant* inputConst = input()->maybeConstantValue()) { |
| 4406 | if (inputConst->isTypeRepresentableAsDouble()) { |
| 4407 | int32_t clamped = ClampDoubleToUint8(inputConst->numberToDouble()); |
| 4408 | return MConstant::New(alloc, Int32Value(clamped)); |
| 4409 | } |
| 4410 | } |
| 4411 | return this; |
| 4412 | } |
| 4413 | |
| 4414 | bool MCompare::tryFoldEqualOperands(bool* result) { |
| 4415 | if (lhs() != rhs()) { |
| 4416 | return false; |
| 4417 | } |
| 4418 | |
| 4419 | // Intuitively somebody would think that if lhs === rhs, |
| 4420 | // then we can just return true. (Or false for !==) |
| 4421 | // However NaN !== NaN is true! So we spend some time trying |
| 4422 | // to eliminate this case. |
| 4423 | |
| 4424 | if (!IsStrictEqualityOp(jsop())) { |
| 4425 | return false; |
| 4426 | } |
| 4427 | |
| 4428 | MOZ_ASSERT(do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4429 | compareType_ == Compare_Undefined || compareType_ == Compare_Null ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4430 | compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4431 | compareType_ == Compare_UInt64 || compareType_ == Compare_Double ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4432 | compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4433 | compareType_ == Compare_UIntPtr || compareType_ == Compare_String ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4434 | compareType_ == Compare_Object || compareType_ == Compare_Symbol ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4435 | compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4436 | compareType_ == Compare_BigInt_Double ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4437 | compareType_ == Compare_BigInt_String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4437); AnnotateMozCrashReason("MOZ_ASSERT" "(" "compareType_ == Compare_Undefined || compareType_ == Compare_Null || compareType_ == Compare_Int32 || compareType_ == Compare_UInt32 || compareType_ == Compare_UInt64 || compareType_ == Compare_Double || compareType_ == Compare_Float32 || compareType_ == Compare_IntPtr || compareType_ == Compare_UIntPtr || compareType_ == Compare_String || compareType_ == Compare_Object || compareType_ == Compare_Symbol || compareType_ == Compare_BigInt || compareType_ == Compare_BigInt_Int32 || compareType_ == Compare_BigInt_Double || compareType_ == Compare_BigInt_String" ")"); do { *((volatile int*)__null) = 4437; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4438 | |
| 4439 | if (isDoubleComparison() || isFloat32Comparison()) { |
| 4440 | if (!operandsAreNeverNaN()) { |
| 4441 | return false; |
| 4442 | } |
| 4443 | } |
| 4444 | |
| 4445 | lhs()->setGuardRangeBailoutsUnchecked(); |
| 4446 | |
| 4447 | *result = (jsop() == JSOp::StrictEq); |
| 4448 | return true; |
| 4449 | } |
| 4450 | |
| 4451 | static JSType TypeOfName(const JSLinearString* str) { |
| 4452 | static constexpr std::array types = { |
| 4453 | JSTYPE_UNDEFINED, JSTYPE_OBJECT, JSTYPE_FUNCTION, JSTYPE_STRING, |
| 4454 | JSTYPE_NUMBER, JSTYPE_BOOLEAN, JSTYPE_SYMBOL, JSTYPE_BIGINT, |
| 4455 | #ifdef ENABLE_RECORD_TUPLE |
| 4456 | JSTYPE_RECORD, JSTYPE_TUPLE, |
| 4457 | #endif |
| 4458 | }; |
| 4459 | static_assert(types.size() == JSTYPE_LIMIT); |
| 4460 | |
| 4461 | const JSAtomState& names = GetJitContext()->runtime->names(); |
| 4462 | for (auto type : types) { |
| 4463 | if (EqualStrings(str, TypeName(type, names))) { |
| 4464 | return type; |
| 4465 | } |
| 4466 | } |
| 4467 | return JSTYPE_LIMIT; |
| 4468 | } |
| 4469 | |
| 4470 | struct TypeOfCompareInput { |
| 4471 | // The `typeof expr` side of the comparison. |
| 4472 | // MTypeOfName for JSOp::Typeof/JSOp::TypeofExpr, and |
| 4473 | // MTypeOf for JSOp::TypeofEq (same pointer as typeOf). |
| 4474 | MDefinition* typeOfSide; |
| 4475 | |
| 4476 | // The actual `typeof` operation. |
| 4477 | MTypeOf* typeOf; |
| 4478 | |
| 4479 | // The string side of the comparison. |
| 4480 | JSType type; |
| 4481 | |
| 4482 | // True if the comparison uses raw JSType (Generated for JSOp::TypeofEq). |
| 4483 | bool isIntComparison; |
| 4484 | |
| 4485 | TypeOfCompareInput(MDefinition* typeOfSide, MTypeOf* typeOf, JSType type, |
| 4486 | bool isIntComparison) |
| 4487 | : typeOfSide(typeOfSide), |
| 4488 | typeOf(typeOf), |
| 4489 | type(type), |
| 4490 | isIntComparison(isIntComparison) {} |
| 4491 | }; |
| 4492 | |
| 4493 | static mozilla::Maybe<TypeOfCompareInput> IsTypeOfCompare(MCompare* ins) { |
| 4494 | if (!IsEqualityOp(ins->jsop())) { |
| 4495 | return mozilla::Nothing(); |
| 4496 | } |
| 4497 | |
| 4498 | if (ins->compareType() == MCompare::Compare_Int32) { |
| 4499 | auto* lhs = ins->lhs(); |
| 4500 | auto* rhs = ins->rhs(); |
| 4501 | |
| 4502 | if (ins->type() != MIRType::Boolean || lhs->type() != MIRType::Int32 || |
| 4503 | rhs->type() != MIRType::Int32) { |
| 4504 | return mozilla::Nothing(); |
| 4505 | } |
| 4506 | |
| 4507 | // NOTE: The comparison is generated inside JIT, and typeof should always |
| 4508 | // be in the LHS. |
| 4509 | if (!lhs->isTypeOf() || !rhs->isConstant()) { |
| 4510 | return mozilla::Nothing(); |
| 4511 | } |
| 4512 | |
| 4513 | auto* typeOf = lhs->toTypeOf(); |
| 4514 | auto* constant = rhs->toConstant(); |
| 4515 | |
| 4516 | JSType type = JSType(constant->toInt32()); |
| 4517 | return mozilla::Some(TypeOfCompareInput(typeOf, typeOf, type, true)); |
| 4518 | } |
| 4519 | |
| 4520 | if (ins->compareType() != MCompare::Compare_String) { |
| 4521 | return mozilla::Nothing(); |
| 4522 | } |
| 4523 | |
| 4524 | auto* lhs = ins->lhs(); |
| 4525 | auto* rhs = ins->rhs(); |
| 4526 | |
| 4527 | MOZ_ASSERT(ins->type() == MIRType::Boolean)do { static_assert( mozilla::detail::AssertionConditionType< decltype(ins->type() == MIRType::Boolean)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(ins->type() == MIRType::Boolean ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "ins->type() == MIRType::Boolean", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4527); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ins->type() == MIRType::Boolean" ")"); do { *((volatile int*)__null) = 4527; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4528 | MOZ_ASSERT(lhs->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lhs->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lhs->type() == MIRType::String ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "lhs->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4528); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lhs->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 4528; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4529 | MOZ_ASSERT(rhs->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(rhs->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(rhs->type() == MIRType::String ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "rhs->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4529); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rhs->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 4529; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4530 | |
| 4531 | if (!lhs->isTypeOfName() && !rhs->isTypeOfName()) { |
| 4532 | return mozilla::Nothing(); |
| 4533 | } |
| 4534 | if (!lhs->isConstant() && !rhs->isConstant()) { |
| 4535 | return mozilla::Nothing(); |
| 4536 | } |
| 4537 | |
| 4538 | auto* typeOfName = |
| 4539 | lhs->isTypeOfName() ? lhs->toTypeOfName() : rhs->toTypeOfName(); |
| 4540 | auto* typeOf = typeOfName->input()->toTypeOf(); |
| 4541 | |
| 4542 | auto* constant = lhs->isConstant() ? lhs->toConstant() : rhs->toConstant(); |
| 4543 | |
| 4544 | JSType type = TypeOfName(&constant->toString()->asLinear()); |
| 4545 | return mozilla::Some(TypeOfCompareInput(typeOfName, typeOf, type, false)); |
| 4546 | } |
| 4547 | |
| 4548 | bool MCompare::tryFoldTypeOf(bool* result) { |
| 4549 | auto typeOfCompare = IsTypeOfCompare(this); |
| 4550 | if (!typeOfCompare) { |
| 4551 | return false; |
| 4552 | } |
| 4553 | auto* typeOf = typeOfCompare->typeOf; |
| 4554 | JSType type = typeOfCompare->type; |
| 4555 | |
| 4556 | switch (type) { |
| 4557 | case JSTYPE_BOOLEAN: |
| 4558 | if (!typeOf->input()->mightBeType(MIRType::Boolean)) { |
| 4559 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4560 | return true; |
| 4561 | } |
| 4562 | break; |
| 4563 | case JSTYPE_NUMBER: |
| 4564 | if (!typeOf->input()->mightBeType(MIRType::Int32) && |
| 4565 | !typeOf->input()->mightBeType(MIRType::Float32) && |
| 4566 | !typeOf->input()->mightBeType(MIRType::Double)) { |
| 4567 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4568 | return true; |
| 4569 | } |
| 4570 | break; |
| 4571 | case JSTYPE_STRING: |
| 4572 | if (!typeOf->input()->mightBeType(MIRType::String)) { |
| 4573 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4574 | return true; |
| 4575 | } |
| 4576 | break; |
| 4577 | case JSTYPE_SYMBOL: |
| 4578 | if (!typeOf->input()->mightBeType(MIRType::Symbol)) { |
| 4579 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4580 | return true; |
| 4581 | } |
| 4582 | break; |
| 4583 | case JSTYPE_BIGINT: |
| 4584 | if (!typeOf->input()->mightBeType(MIRType::BigInt)) { |
| 4585 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4586 | return true; |
| 4587 | } |
| 4588 | break; |
| 4589 | case JSTYPE_OBJECT: |
| 4590 | if (!typeOf->input()->mightBeType(MIRType::Object) && |
| 4591 | !typeOf->input()->mightBeType(MIRType::Null)) { |
| 4592 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4593 | return true; |
| 4594 | } |
| 4595 | break; |
| 4596 | case JSTYPE_UNDEFINED: |
| 4597 | if (!typeOf->input()->mightBeType(MIRType::Object) && |
| 4598 | !typeOf->input()->mightBeType(MIRType::Undefined)) { |
| 4599 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4600 | return true; |
| 4601 | } |
| 4602 | break; |
| 4603 | case JSTYPE_FUNCTION: |
| 4604 | if (!typeOf->input()->mightBeType(MIRType::Object)) { |
| 4605 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4606 | return true; |
| 4607 | } |
| 4608 | break; |
| 4609 | case JSTYPE_LIMIT: |
| 4610 | *result = (jsop() == JSOp::StrictNe || jsop() == JSOp::Ne); |
| 4611 | return true; |
| 4612 | #ifdef ENABLE_RECORD_TUPLE |
| 4613 | case JSTYPE_RECORD: |
| 4614 | case JSTYPE_TUPLE: |
| 4615 | MOZ_CRASH("Records and Tuples are not supported yet.")do { do { } while (false); MOZ_ReportCrash("" "Records and Tuples are not supported yet." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4615); AnnotateMozCrashReason("MOZ_CRASH(" "Records and Tuples are not supported yet." ")"); do { *((volatile int*)__null) = 4615; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4616 | #endif |
| 4617 | } |
| 4618 | |
| 4619 | return false; |
| 4620 | } |
| 4621 | |
| 4622 | bool MCompare::tryFold(bool* result) { |
| 4623 | JSOp op = jsop(); |
| 4624 | |
| 4625 | if (tryFoldEqualOperands(result)) { |
| 4626 | return true; |
| 4627 | } |
| 4628 | |
| 4629 | if (tryFoldTypeOf(result)) { |
| 4630 | return true; |
| 4631 | } |
| 4632 | |
| 4633 | if (compareType_ == Compare_Null || compareType_ == Compare_Undefined) { |
| 4634 | // The LHS is the value we want to test against null or undefined. |
| 4635 | if (IsStrictEqualityOp(op)) { |
| 4636 | if (lhs()->type() == inputType()) { |
| 4637 | *result = (op == JSOp::StrictEq); |
| 4638 | return true; |
| 4639 | } |
| 4640 | if (!lhs()->mightBeType(inputType())) { |
| 4641 | *result = (op == JSOp::StrictNe); |
| 4642 | return true; |
| 4643 | } |
| 4644 | } else { |
| 4645 | MOZ_ASSERT(IsLooseEqualityOp(op))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsLooseEqualityOp(op))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsLooseEqualityOp(op)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("IsLooseEqualityOp(op)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4645); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsLooseEqualityOp(op)" ")"); do { *((volatile int*)__null) = 4645; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4646 | if (IsNullOrUndefined(lhs()->type())) { |
| 4647 | *result = (op == JSOp::Eq); |
| 4648 | return true; |
| 4649 | } |
| 4650 | if (!lhs()->mightBeType(MIRType::Null) && |
| 4651 | !lhs()->mightBeType(MIRType::Undefined) && |
| 4652 | !lhs()->mightBeType(MIRType::Object)) { |
| 4653 | *result = (op == JSOp::Ne); |
| 4654 | return true; |
| 4655 | } |
| 4656 | } |
| 4657 | return false; |
| 4658 | } |
| 4659 | |
| 4660 | return false; |
| 4661 | } |
| 4662 | |
| 4663 | template <typename T> |
| 4664 | static bool FoldComparison(JSOp op, T left, T right) { |
| 4665 | switch (op) { |
| 4666 | case JSOp::Lt: |
| 4667 | return left < right; |
| 4668 | case JSOp::Le: |
| 4669 | return left <= right; |
| 4670 | case JSOp::Gt: |
| 4671 | return left > right; |
| 4672 | case JSOp::Ge: |
| 4673 | return left >= right; |
| 4674 | case JSOp::StrictEq: |
| 4675 | case JSOp::Eq: |
| 4676 | return left == right; |
| 4677 | case JSOp::StrictNe: |
| 4678 | case JSOp::Ne: |
| 4679 | return left != right; |
| 4680 | default: |
| 4681 | MOZ_CRASH("Unexpected op.")do { do { } while (false); MOZ_ReportCrash("" "Unexpected op." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4681); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected op." ")"); do { *((volatile int*)__null) = 4681; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4682 | } |
| 4683 | } |
| 4684 | |
| 4685 | static bool FoldBigIntComparison(JSOp op, const BigInt* left, double right) { |
| 4686 | switch (op) { |
| 4687 | case JSOp::Lt: |
| 4688 | return BigInt::lessThan(left, right).valueOr(false); |
| 4689 | case JSOp::Le: |
| 4690 | return !BigInt::lessThan(right, left).valueOr(true); |
| 4691 | case JSOp::Gt: |
| 4692 | return BigInt::lessThan(right, left).valueOr(false); |
| 4693 | case JSOp::Ge: |
| 4694 | return !BigInt::lessThan(left, right).valueOr(true); |
| 4695 | case JSOp::StrictEq: |
| 4696 | case JSOp::Eq: |
| 4697 | return BigInt::equal(left, right); |
| 4698 | case JSOp::StrictNe: |
| 4699 | case JSOp::Ne: |
| 4700 | return !BigInt::equal(left, right); |
| 4701 | default: |
| 4702 | MOZ_CRASH("Unexpected op.")do { do { } while (false); MOZ_ReportCrash("" "Unexpected op." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4702); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected op." ")"); do { *((volatile int*)__null) = 4702; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4703 | } |
| 4704 | } |
| 4705 | |
| 4706 | bool MCompare::evaluateConstantOperands(TempAllocator& alloc, bool* result) { |
| 4707 | if (type() != MIRType::Boolean && type() != MIRType::Int32) { |
| 4708 | return false; |
| 4709 | } |
| 4710 | |
| 4711 | MDefinition* left = getOperand(0); |
| 4712 | MDefinition* right = getOperand(1); |
| 4713 | |
| 4714 | if (compareType() == Compare_Double) { |
| 4715 | // Optimize "MCompare MConstant (MToDouble SomethingInInt32Range). |
| 4716 | // In most cases the MToDouble was added, because the constant is |
| 4717 | // a double. |
| 4718 | // e.g. v < 9007199254740991, where v is an int32 is always true. |
| 4719 | if (!lhs()->isConstant() && !rhs()->isConstant()) { |
| 4720 | return false; |
| 4721 | } |
| 4722 | |
| 4723 | MDefinition* operand = left->isConstant() ? right : left; |
| 4724 | MConstant* constant = |
| 4725 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 4726 | MOZ_ASSERT(constant->type() == MIRType::Double)do { static_assert( mozilla::detail::AssertionConditionType< decltype(constant->type() == MIRType::Double)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(constant->type() == MIRType::Double))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("constant->type() == MIRType::Double" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4726); AnnotateMozCrashReason("MOZ_ASSERT" "(" "constant->type() == MIRType::Double" ")"); do { *((volatile int*)__null) = 4726; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4727 | double cte = constant->toDouble(); |
| 4728 | |
| 4729 | if (operand->isToDouble() && |
| 4730 | operand->getOperand(0)->type() == MIRType::Int32) { |
| 4731 | bool replaced = false; |
| 4732 | switch (jsop_) { |
| 4733 | case JSOp::Lt: |
| 4734 | if (cte > INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4735 | *result = !((constant == lhs()) ^ (cte < INT32_MIN(-2147483647-1))); |
| 4736 | replaced = true; |
| 4737 | } |
| 4738 | break; |
| 4739 | case JSOp::Le: |
| 4740 | if (constant == lhs()) { |
| 4741 | if (cte > INT32_MAX(2147483647) || cte <= INT32_MIN(-2147483647-1)) { |
| 4742 | *result = (cte <= INT32_MIN(-2147483647-1)); |
| 4743 | replaced = true; |
| 4744 | } |
| 4745 | } else { |
| 4746 | if (cte >= INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4747 | *result = (cte >= INT32_MIN(-2147483647-1)); |
| 4748 | replaced = true; |
| 4749 | } |
| 4750 | } |
| 4751 | break; |
| 4752 | case JSOp::Gt: |
| 4753 | if (cte > INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4754 | *result = !((constant == rhs()) ^ (cte < INT32_MIN(-2147483647-1))); |
| 4755 | replaced = true; |
| 4756 | } |
| 4757 | break; |
| 4758 | case JSOp::Ge: |
| 4759 | if (constant == lhs()) { |
| 4760 | if (cte >= INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4761 | *result = (cte >= INT32_MAX(2147483647)); |
| 4762 | replaced = true; |
| 4763 | } |
| 4764 | } else { |
| 4765 | if (cte > INT32_MAX(2147483647) || cte <= INT32_MIN(-2147483647-1)) { |
| 4766 | *result = (cte <= INT32_MIN(-2147483647-1)); |
| 4767 | replaced = true; |
| 4768 | } |
| 4769 | } |
| 4770 | break; |
| 4771 | case JSOp::StrictEq: // Fall through. |
| 4772 | case JSOp::Eq: |
| 4773 | if (cte > INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4774 | *result = false; |
| 4775 | replaced = true; |
| 4776 | } |
| 4777 | break; |
| 4778 | case JSOp::StrictNe: // Fall through. |
| 4779 | case JSOp::Ne: |
| 4780 | if (cte > INT32_MAX(2147483647) || cte < INT32_MIN(-2147483647-1)) { |
| 4781 | *result = true; |
| 4782 | replaced = true; |
| 4783 | } |
| 4784 | break; |
| 4785 | default: |
| 4786 | MOZ_CRASH("Unexpected op.")do { do { } while (false); MOZ_ReportCrash("" "Unexpected op." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4786); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected op." ")"); do { *((volatile int*)__null) = 4786; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4787 | } |
| 4788 | if (replaced) { |
| 4789 | MLimitedTruncate* limit = MLimitedTruncate::New( |
| 4790 | alloc, operand->getOperand(0), TruncateKind::NoTruncate); |
| 4791 | limit->setGuardUnchecked(); |
| 4792 | block()->insertBefore(this, limit); |
| 4793 | return true; |
| 4794 | } |
| 4795 | } |
| 4796 | |
| 4797 | // Optimize comparison against NaN. |
| 4798 | if (std::isnan(cte)) { |
| 4799 | switch (jsop_) { |
| 4800 | case JSOp::Lt: |
| 4801 | case JSOp::Le: |
| 4802 | case JSOp::Gt: |
| 4803 | case JSOp::Ge: |
| 4804 | case JSOp::Eq: |
| 4805 | case JSOp::StrictEq: |
| 4806 | *result = false; |
| 4807 | break; |
| 4808 | case JSOp::Ne: |
| 4809 | case JSOp::StrictNe: |
| 4810 | *result = true; |
| 4811 | break; |
| 4812 | default: |
| 4813 | MOZ_CRASH("Unexpected op.")do { do { } while (false); MOZ_ReportCrash("" "Unexpected op." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4813); AnnotateMozCrashReason("MOZ_CRASH(" "Unexpected op." ")"); do { *((volatile int*)__null) = 4813; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4814 | } |
| 4815 | return true; |
| 4816 | } |
| 4817 | } |
| 4818 | |
| 4819 | if (!left->isConstant() || !right->isConstant()) { |
| 4820 | return false; |
| 4821 | } |
| 4822 | |
| 4823 | MConstant* lhs = left->toConstant(); |
| 4824 | MConstant* rhs = right->toConstant(); |
| 4825 | |
| 4826 | switch (compareType()) { |
| 4827 | case Compare_Int32: |
| 4828 | case Compare_Double: |
| 4829 | case Compare_Float32: { |
| 4830 | *result = |
| 4831 | FoldComparison(jsop_, lhs->numberToDouble(), rhs->numberToDouble()); |
| 4832 | return true; |
| 4833 | } |
| 4834 | case Compare_UInt32: { |
| 4835 | *result = FoldComparison(jsop_, uint32_t(lhs->toInt32()), |
| 4836 | uint32_t(rhs->toInt32())); |
| 4837 | return true; |
| 4838 | } |
| 4839 | case Compare_Int64: { |
| 4840 | *result = FoldComparison(jsop_, lhs->toInt64(), rhs->toInt64()); |
| 4841 | return true; |
| 4842 | } |
| 4843 | case Compare_UInt64: { |
| 4844 | *result = FoldComparison(jsop_, uint64_t(lhs->toInt64()), |
| 4845 | uint64_t(rhs->toInt64())); |
| 4846 | return true; |
| 4847 | } |
| 4848 | case Compare_IntPtr: { |
| 4849 | *result = FoldComparison(jsop_, lhs->toIntPtr(), rhs->toIntPtr()); |
| 4850 | return true; |
| 4851 | } |
| 4852 | case Compare_UIntPtr: { |
| 4853 | *result = FoldComparison(jsop_, uintptr_t(lhs->toIntPtr()), |
| 4854 | uintptr_t(rhs->toIntPtr())); |
| 4855 | return true; |
| 4856 | } |
| 4857 | case Compare_String: { |
| 4858 | int32_t comp = CompareStrings(&lhs->toString()->asLinear(), |
| 4859 | &rhs->toString()->asLinear()); |
| 4860 | *result = FoldComparison(jsop_, comp, 0); |
| 4861 | return true; |
| 4862 | } |
| 4863 | case Compare_BigInt: { |
| 4864 | int32_t comp = BigInt::compare(lhs->toBigInt(), rhs->toBigInt()); |
| 4865 | *result = FoldComparison(jsop_, comp, 0); |
| 4866 | return true; |
| 4867 | } |
| 4868 | case Compare_BigInt_Int32: |
| 4869 | case Compare_BigInt_Double: { |
| 4870 | *result = |
| 4871 | FoldBigIntComparison(jsop_, lhs->toBigInt(), rhs->numberToDouble()); |
| 4872 | return true; |
| 4873 | } |
| 4874 | case Compare_BigInt_String: { |
| 4875 | JSLinearString* linear = &rhs->toString()->asLinear(); |
| 4876 | if (!linear->hasIndexValue()) { |
| 4877 | return false; |
| 4878 | } |
| 4879 | *result = |
| 4880 | FoldBigIntComparison(jsop_, lhs->toBigInt(), linear->getIndexValue()); |
| 4881 | return true; |
| 4882 | } |
| 4883 | |
| 4884 | case Compare_Undefined: |
| 4885 | case Compare_Null: |
| 4886 | case Compare_Symbol: |
| 4887 | case Compare_Object: |
| 4888 | case Compare_WasmAnyRef: |
| 4889 | return false; |
| 4890 | } |
| 4891 | |
| 4892 | MOZ_CRASH("unexpected compare type")do { do { } while (false); MOZ_ReportCrash("" "unexpected compare type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4892); AnnotateMozCrashReason("MOZ_CRASH(" "unexpected compare type" ")"); do { *((volatile int*)__null) = 4892; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 4893 | } |
| 4894 | |
| 4895 | MDefinition* MCompare::tryFoldTypeOf(TempAllocator& alloc) { |
| 4896 | auto typeOfCompare = IsTypeOfCompare(this); |
| 4897 | if (!typeOfCompare) { |
| 4898 | return this; |
| 4899 | } |
| 4900 | auto* typeOf = typeOfCompare->typeOf; |
| 4901 | JSType type = typeOfCompare->type; |
| 4902 | |
| 4903 | auto* input = typeOf->input(); |
| 4904 | MOZ_ASSERT(input->type() == MIRType::Value ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(input->type() == MIRType::Value || input->type () == MIRType::Object)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(input->type() == MIRType:: Value || input->type() == MIRType::Object))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("input->type() == MIRType::Value || input->type() == MIRType::Object" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4905); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input->type() == MIRType::Value || input->type() == MIRType::Object" ")"); do { *((volatile int*)__null) = 4905; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4905 | input->type() == MIRType::Object)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input->type() == MIRType::Value || input->type () == MIRType::Object)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(input->type() == MIRType:: Value || input->type() == MIRType::Object))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("input->type() == MIRType::Value || input->type() == MIRType::Object" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4905); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input->type() == MIRType::Value || input->type() == MIRType::Object" ")"); do { *((volatile int*)__null) = 4905; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4906 | |
| 4907 | // Constant typeof folding handles the other cases. |
| 4908 | MOZ_ASSERT_IF(input->type() == MIRType::Object, type == JSTYPE_UNDEFINED ||do { if (input->type() == MIRType::Object) { do { static_assert ( mozilla::detail::AssertionConditionType<decltype(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4910); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" ")"); do { *((volatile int*)__null) = 4910; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
| 4909 | type == JSTYPE_OBJECT ||do { if (input->type() == MIRType::Object) { do { static_assert ( mozilla::detail::AssertionConditionType<decltype(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4910); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" ")"); do { *((volatile int*)__null) = 4910; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
| 4910 | type == JSTYPE_FUNCTION)do { if (input->type() == MIRType::Object) { do { static_assert ( mozilla::detail::AssertionConditionType<decltype(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4910); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type == JSTYPE_UNDEFINED || type == JSTYPE_OBJECT || type == JSTYPE_FUNCTION" ")"); do { *((volatile int*)__null) = 4910; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 4911 | |
| 4912 | MOZ_ASSERT(type != JSTYPE_LIMIT, "unknown typeof strings folded earlier")do { static_assert( mozilla::detail::AssertionConditionType< decltype(type != JSTYPE_LIMIT)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type != JSTYPE_LIMIT))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("type != JSTYPE_LIMIT" " (" "unknown typeof strings folded earlier" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4912); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type != JSTYPE_LIMIT" ") (" "unknown typeof strings folded earlier" ")"); do { *(( volatile int*)__null) = 4912; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
| 4913 | |
| 4914 | // If there's only a single use, assume this |typeof| is used in a simple |
| 4915 | // comparison context. |
| 4916 | // |
| 4917 | // if (typeof thing === "number") { ... } |
| 4918 | // |
| 4919 | // It'll be compiled into something similar to: |
| 4920 | // |
| 4921 | // if (IsNumber(thing)) { ... } |
| 4922 | // |
| 4923 | // This heuristic can go wrong when repeated |typeof| are used in consecutive |
| 4924 | // if-statements. |
| 4925 | // |
| 4926 | // if (typeof thing === "number") { ... } |
| 4927 | // else if (typeof thing === "string") { ... } |
| 4928 | // ... repeated for all possible types |
| 4929 | // |
| 4930 | // In that case it'd more efficient to emit MTypeOf compared to MTypeOfIs. We |
| 4931 | // don't yet handle that case, because it'd require a separate optimization |
| 4932 | // pass to correctly detect it. |
| 4933 | if (typeOfCompare->typeOfSide->hasOneUse()) { |
| 4934 | return MTypeOfIs::New(alloc, input, jsop(), type); |
| 4935 | } |
| 4936 | |
| 4937 | if (typeOfCompare->isIntComparison) { |
| 4938 | // Already optimized. |
| 4939 | return this; |
| 4940 | } |
| 4941 | |
| 4942 | MConstant* cst = MConstant::New(alloc, Int32Value(type)); |
| 4943 | block()->insertBefore(this, cst); |
| 4944 | |
| 4945 | return MCompare::New(alloc, typeOf, cst, jsop(), MCompare::Compare_Int32); |
| 4946 | } |
| 4947 | |
| 4948 | MDefinition* MCompare::tryFoldCharCompare(TempAllocator& alloc) { |
| 4949 | if (compareType() != Compare_String) { |
| 4950 | return this; |
| 4951 | } |
| 4952 | |
| 4953 | MDefinition* left = lhs(); |
| 4954 | MOZ_ASSERT(left->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4954); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 4954; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4955 | |
| 4956 | MDefinition* right = rhs(); |
| 4957 | MOZ_ASSERT(right->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 4957); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 4957; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4958 | |
| 4959 | // |str[i]| is compiled as |MFromCharCode(MCharCodeAt(str, i))|. |
| 4960 | // Out-of-bounds access is compiled as |
| 4961 | // |FromCharCodeEmptyIfNegative(CharCodeAtOrNegative(str, i))|. |
| 4962 | auto isCharAccess = [](MDefinition* ins) { |
| 4963 | if (ins->isFromCharCode()) { |
| 4964 | return ins->toFromCharCode()->code()->isCharCodeAt(); |
| 4965 | } |
| 4966 | if (ins->isFromCharCodeEmptyIfNegative()) { |
| 4967 | auto* fromCharCode = ins->toFromCharCodeEmptyIfNegative(); |
| 4968 | return fromCharCode->code()->isCharCodeAtOrNegative(); |
| 4969 | } |
| 4970 | return false; |
| 4971 | }; |
| 4972 | |
| 4973 | auto charAccessCode = [](MDefinition* ins) { |
| 4974 | if (ins->isFromCharCode()) { |
| 4975 | return ins->toFromCharCode()->code(); |
| 4976 | } |
| 4977 | return ins->toFromCharCodeEmptyIfNegative()->code(); |
| 4978 | }; |
| 4979 | |
| 4980 | if (left->isConstant() || right->isConstant()) { |
| 4981 | // Try to optimize |MConstant(string) <compare> (MFromCharCode MCharCodeAt)| |
| 4982 | // as |MConstant(charcode) <compare> MCharCodeAt|. |
| 4983 | MConstant* constant; |
| 4984 | MDefinition* operand; |
| 4985 | if (left->isConstant()) { |
| 4986 | constant = left->toConstant(); |
| 4987 | operand = right; |
| 4988 | } else { |
| 4989 | constant = right->toConstant(); |
| 4990 | operand = left; |
| 4991 | } |
| 4992 | |
| 4993 | if (constant->toString()->length() != 1 || !isCharAccess(operand)) { |
| 4994 | return this; |
| 4995 | } |
| 4996 | |
| 4997 | char16_t charCode = constant->toString()->asLinear().latin1OrTwoByteChar(0); |
| 4998 | MConstant* charCodeConst = MConstant::New(alloc, Int32Value(charCode)); |
| 4999 | block()->insertBefore(this, charCodeConst); |
| 5000 | |
| 5001 | MDefinition* charCodeAt = charAccessCode(operand); |
| 5002 | |
| 5003 | if (left->isConstant()) { |
| 5004 | left = charCodeConst; |
| 5005 | right = charCodeAt; |
| 5006 | } else { |
| 5007 | left = charCodeAt; |
| 5008 | right = charCodeConst; |
| 5009 | } |
| 5010 | } else if (isCharAccess(left) && isCharAccess(right)) { |
| 5011 | // Try to optimize |(MFromCharCode MCharCodeAt) <compare> (MFromCharCode |
| 5012 | // MCharCodeAt)| as |MCharCodeAt <compare> MCharCodeAt|. |
| 5013 | |
| 5014 | left = charAccessCode(left); |
| 5015 | right = charAccessCode(right); |
| 5016 | } else { |
| 5017 | return this; |
| 5018 | } |
| 5019 | |
| 5020 | return MCompare::New(alloc, left, right, jsop(), MCompare::Compare_Int32); |
| 5021 | } |
| 5022 | |
| 5023 | MDefinition* MCompare::tryFoldStringCompare(TempAllocator& alloc) { |
| 5024 | if (compareType() != Compare_String) { |
| 5025 | return this; |
| 5026 | } |
| 5027 | |
| 5028 | MDefinition* left = lhs(); |
| 5029 | MOZ_ASSERT(left->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5029); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 5029; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5030 | |
| 5031 | MDefinition* right = rhs(); |
| 5032 | MOZ_ASSERT(right->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5032); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 5032; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5033 | |
| 5034 | if (!left->isConstant() && !right->isConstant()) { |
| 5035 | return this; |
| 5036 | } |
| 5037 | |
| 5038 | // Try to optimize |string <compare> MConstant("")| as |MStringLength(string) |
| 5039 | // <compare> MConstant(0)|. |
| 5040 | |
| 5041 | MConstant* constant = |
| 5042 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5043 | if (!constant->toString()->empty()) { |
| 5044 | return this; |
| 5045 | } |
| 5046 | |
| 5047 | MDefinition* operand = left->isConstant() ? right : left; |
| 5048 | |
| 5049 | auto* strLength = MStringLength::New(alloc, operand); |
| 5050 | block()->insertBefore(this, strLength); |
| 5051 | |
| 5052 | auto* zero = MConstant::New(alloc, Int32Value(0)); |
| 5053 | block()->insertBefore(this, zero); |
| 5054 | |
| 5055 | if (left->isConstant()) { |
| 5056 | left = zero; |
| 5057 | right = strLength; |
| 5058 | } else { |
| 5059 | left = strLength; |
| 5060 | right = zero; |
| 5061 | } |
| 5062 | |
| 5063 | return MCompare::New(alloc, left, right, jsop(), MCompare::Compare_Int32); |
| 5064 | } |
| 5065 | |
| 5066 | MDefinition* MCompare::tryFoldStringSubstring(TempAllocator& alloc) { |
| 5067 | if (compareType() != Compare_String) { |
| 5068 | return this; |
| 5069 | } |
| 5070 | if (!IsEqualityOp(jsop())) { |
| 5071 | return this; |
| 5072 | } |
| 5073 | |
| 5074 | auto* left = lhs(); |
| 5075 | MOZ_ASSERT(left->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5075); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 5075; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5076 | |
| 5077 | auto* right = rhs(); |
| 5078 | MOZ_ASSERT(right->type() == MIRType::String)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::String)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: String))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::String", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5078); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::String" ")"); do { *((volatile int*)__null) = 5078; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5079 | |
| 5080 | // One operand must be a constant string. |
| 5081 | if (!left->isConstant() && !right->isConstant()) { |
| 5082 | return this; |
| 5083 | } |
| 5084 | |
| 5085 | // The constant string must be non-empty. |
| 5086 | auto* constant = |
| 5087 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5088 | if (constant->toString()->empty()) { |
| 5089 | return this; |
| 5090 | } |
| 5091 | |
| 5092 | // The other operand must be a substring operation. |
| 5093 | auto* operand = left->isConstant() ? right : left; |
| 5094 | if (!operand->isSubstr()) { |
| 5095 | return this; |
| 5096 | } |
| 5097 | auto* substr = operand->toSubstr(); |
| 5098 | |
| 5099 | static_assert(JSString::MAX_LENGTH < INT32_MAX(2147483647), |
| 5100 | "string length can be casted to int32_t"); |
| 5101 | |
| 5102 | if (!IsSubstrTo(substr, int32_t(constant->toString()->length()))) { |
| 5103 | return this; |
| 5104 | } |
| 5105 | |
| 5106 | // Now fold code like |str.substring(0, 2) == "aa"| to |str.startsWith("aa")|. |
| 5107 | |
| 5108 | auto* startsWith = MStringStartsWith::New(alloc, substr->string(), constant); |
| 5109 | if (jsop() == JSOp::Eq || jsop() == JSOp::StrictEq) { |
| 5110 | return startsWith; |
| 5111 | } |
| 5112 | |
| 5113 | // Invert for inequality. |
| 5114 | MOZ_ASSERT(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe)do { static_assert( mozilla::detail::AssertionConditionType< decltype(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("jsop() == JSOp::Ne || jsop() == JSOp::StrictNe" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5114); AnnotateMozCrashReason("MOZ_ASSERT" "(" "jsop() == JSOp::Ne || jsop() == JSOp::StrictNe" ")"); do { *((volatile int*)__null) = 5114; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5115 | |
| 5116 | block()->insertBefore(this, startsWith); |
| 5117 | return MNot::New(alloc, startsWith); |
| 5118 | } |
| 5119 | |
| 5120 | MDefinition* MCompare::tryFoldStringIndexOf(TempAllocator& alloc) { |
| 5121 | if (compareType() != Compare_Int32) { |
| 5122 | return this; |
| 5123 | } |
| 5124 | if (!IsEqualityOp(jsop())) { |
| 5125 | return this; |
| 5126 | } |
| 5127 | |
| 5128 | auto* left = lhs(); |
| 5129 | MOZ_ASSERT(left->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5129); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 5129; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5130 | |
| 5131 | auto* right = rhs(); |
| 5132 | MOZ_ASSERT(right->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5132); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 5132; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5133 | |
| 5134 | // One operand must be a constant integer. |
| 5135 | if (!left->isConstant() && !right->isConstant()) { |
| 5136 | return this; |
| 5137 | } |
| 5138 | |
| 5139 | // The constant must be zero. |
| 5140 | auto* constant = |
| 5141 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5142 | if (!constant->isInt32(0)) { |
| 5143 | return this; |
| 5144 | } |
| 5145 | |
| 5146 | // The other operand must be an indexOf operation. |
| 5147 | auto* operand = left->isConstant() ? right : left; |
| 5148 | if (!operand->isStringIndexOf()) { |
| 5149 | return this; |
| 5150 | } |
| 5151 | |
| 5152 | // Fold |str.indexOf(searchStr) == 0| to |str.startsWith(searchStr)|. |
| 5153 | |
| 5154 | auto* indexOf = operand->toStringIndexOf(); |
| 5155 | auto* startsWith = |
| 5156 | MStringStartsWith::New(alloc, indexOf->string(), indexOf->searchString()); |
| 5157 | if (jsop() == JSOp::Eq || jsop() == JSOp::StrictEq) { |
| 5158 | return startsWith; |
| 5159 | } |
| 5160 | |
| 5161 | // Invert for inequality. |
| 5162 | MOZ_ASSERT(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe)do { static_assert( mozilla::detail::AssertionConditionType< decltype(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(jsop() == JSOp::Ne || jsop() == JSOp::StrictNe))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("jsop() == JSOp::Ne || jsop() == JSOp::StrictNe" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5162); AnnotateMozCrashReason("MOZ_ASSERT" "(" "jsop() == JSOp::Ne || jsop() == JSOp::StrictNe" ")"); do { *((volatile int*)__null) = 5162; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5163 | |
| 5164 | block()->insertBefore(this, startsWith); |
| 5165 | return MNot::New(alloc, startsWith); |
| 5166 | } |
| 5167 | |
| 5168 | MDefinition* MCompare::tryFoldBigInt64(TempAllocator& alloc) { |
| 5169 | if (compareType() == Compare_BigInt) { |
| 5170 | auto* left = lhs(); |
| 5171 | MOZ_ASSERT(left->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5171); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5171; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5172 | |
| 5173 | auto* right = rhs(); |
| 5174 | MOZ_ASSERT(right->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5174); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5174; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5175 | |
| 5176 | // At least one operand must be MInt64ToBigInt. |
| 5177 | if (!left->isInt64ToBigInt() && !right->isInt64ToBigInt()) { |
| 5178 | return this; |
| 5179 | } |
| 5180 | |
| 5181 | // Unwrap MInt64ToBigInt on both sides and perform a Int64 comparison. |
| 5182 | if (left->isInt64ToBigInt() && right->isInt64ToBigInt()) { |
| 5183 | auto* lhsInt64 = left->toInt64ToBigInt(); |
| 5184 | auto* rhsInt64 = right->toInt64ToBigInt(); |
| 5185 | |
| 5186 | // Don't optimize if Int64 against Uint64 comparison. |
| 5187 | if (lhsInt64->elementType() != rhsInt64->elementType()) { |
| 5188 | return this; |
| 5189 | } |
| 5190 | |
| 5191 | bool isSigned = lhsInt64->elementType() == Scalar::BigInt64; |
| 5192 | auto compareType = |
| 5193 | isSigned ? MCompare::Compare_Int64 : MCompare::Compare_UInt64; |
| 5194 | return MCompare::New(alloc, lhsInt64->input(), rhsInt64->input(), jsop_, |
| 5195 | compareType); |
| 5196 | } |
| 5197 | |
| 5198 | // Optimize IntPtr x Int64 comparison to Int64 x Int64 comparison. |
| 5199 | if (left->isIntPtrToBigInt() || right->isIntPtrToBigInt()) { |
| 5200 | auto* int64ToBigInt = left->isInt64ToBigInt() ? left->toInt64ToBigInt() |
| 5201 | : right->toInt64ToBigInt(); |
| 5202 | |
| 5203 | // Can't optimize when comparing Uint64 against IntPtr. |
| 5204 | if (int64ToBigInt->elementType() == Scalar::BigUint64) { |
| 5205 | return this; |
| 5206 | } |
| 5207 | |
| 5208 | auto* intPtrToBigInt = left->isIntPtrToBigInt() |
| 5209 | ? left->toIntPtrToBigInt() |
| 5210 | : right->toIntPtrToBigInt(); |
| 5211 | |
| 5212 | auto* intPtrToInt64 = MIntPtrToInt64::New(alloc, intPtrToBigInt->input()); |
| 5213 | block()->insertBefore(this, intPtrToInt64); |
| 5214 | |
| 5215 | if (left == int64ToBigInt) { |
| 5216 | left = int64ToBigInt->input(); |
| 5217 | right = intPtrToInt64; |
| 5218 | } else { |
| 5219 | left = intPtrToInt64; |
| 5220 | right = int64ToBigInt->input(); |
| 5221 | } |
| 5222 | return MCompare::New(alloc, left, right, jsop_, MCompare::Compare_Int64); |
| 5223 | } |
| 5224 | |
| 5225 | // The other operand must be a constant. |
| 5226 | if (!left->isConstant() && !right->isConstant()) { |
| 5227 | return this; |
| 5228 | } |
| 5229 | |
| 5230 | auto* int64ToBigInt = left->isInt64ToBigInt() ? left->toInt64ToBigInt() |
| 5231 | : right->toInt64ToBigInt(); |
| 5232 | bool isSigned = int64ToBigInt->elementType() == Scalar::BigInt64; |
| 5233 | |
| 5234 | auto* constant = |
| 5235 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5236 | auto* bigInt = constant->toBigInt(); |
| 5237 | |
| 5238 | // Extract the BigInt value if representable as Int64/Uint64. |
| 5239 | mozilla::Maybe<int64_t> value; |
| 5240 | if (isSigned) { |
| 5241 | int64_t x; |
| 5242 | if (BigInt::isInt64(bigInt, &x)) { |
| 5243 | value = mozilla::Some(x); |
| 5244 | } |
| 5245 | } else { |
| 5246 | uint64_t x; |
| 5247 | if (BigInt::isUint64(bigInt, &x)) { |
| 5248 | value = mozilla::Some(static_cast<int64_t>(x)); |
| 5249 | } |
| 5250 | } |
| 5251 | |
| 5252 | // The comparison is a constant if the BigInt has too many digits. |
| 5253 | if (!value) { |
| 5254 | int32_t repr = bigInt->isNegative() ? -1 : 1; |
| 5255 | |
| 5256 | bool result; |
| 5257 | if (left == int64ToBigInt) { |
| 5258 | result = FoldComparison(jsop_, 0, repr); |
| 5259 | } else { |
| 5260 | result = FoldComparison(jsop_, repr, 0); |
| 5261 | } |
| 5262 | return MConstant::New(alloc, BooleanValue(result)); |
| 5263 | } |
| 5264 | |
| 5265 | auto* cst = MConstant::NewInt64(alloc, *value); |
| 5266 | block()->insertBefore(this, cst); |
| 5267 | |
| 5268 | auto compareType = |
| 5269 | isSigned ? MCompare::Compare_Int64 : MCompare::Compare_UInt64; |
| 5270 | if (left == int64ToBigInt) { |
| 5271 | return MCompare::New(alloc, int64ToBigInt->input(), cst, jsop_, |
| 5272 | compareType); |
| 5273 | } |
| 5274 | return MCompare::New(alloc, cst, int64ToBigInt->input(), jsop_, |
| 5275 | compareType); |
| 5276 | } |
| 5277 | |
| 5278 | if (compareType() == Compare_BigInt_Int32) { |
| 5279 | auto* left = lhs(); |
| 5280 | MOZ_ASSERT(left->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5280); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5280; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5281 | |
| 5282 | auto* right = rhs(); |
| 5283 | MOZ_ASSERT(right->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5283); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 5283; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5284 | |
| 5285 | // Optimize MInt64ToBigInt against a constant int32. |
| 5286 | if (!left->isInt64ToBigInt() || !right->isConstant()) { |
| 5287 | return this; |
| 5288 | } |
| 5289 | |
| 5290 | auto* int64ToBigInt = left->toInt64ToBigInt(); |
| 5291 | bool isSigned = int64ToBigInt->elementType() == Scalar::BigInt64; |
| 5292 | |
| 5293 | int32_t constInt32 = right->toConstant()->toInt32(); |
| 5294 | |
| 5295 | // The unsigned comparison against a negative operand is a constant. |
| 5296 | if (!isSigned && constInt32 < 0) { |
| 5297 | bool result = FoldComparison(jsop_, 0, constInt32); |
| 5298 | return MConstant::New(alloc, BooleanValue(result)); |
| 5299 | } |
| 5300 | |
| 5301 | auto* cst = MConstant::NewInt64(alloc, int64_t(constInt32)); |
| 5302 | block()->insertBefore(this, cst); |
| 5303 | |
| 5304 | auto compareType = |
| 5305 | isSigned ? MCompare::Compare_Int64 : MCompare::Compare_UInt64; |
| 5306 | return MCompare::New(alloc, int64ToBigInt->input(), cst, jsop_, |
| 5307 | compareType); |
| 5308 | } |
| 5309 | |
| 5310 | return this; |
| 5311 | } |
| 5312 | |
| 5313 | MDefinition* MCompare::tryFoldBigIntPtr(TempAllocator& alloc) { |
| 5314 | if (compareType() == Compare_BigInt) { |
| 5315 | auto* left = lhs(); |
| 5316 | MOZ_ASSERT(left->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5316); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5316; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5317 | |
| 5318 | auto* right = rhs(); |
| 5319 | MOZ_ASSERT(right->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5319); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5319; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5320 | |
| 5321 | // At least one operand must be MIntPtrToBigInt. |
| 5322 | if (!left->isIntPtrToBigInt() && !right->isIntPtrToBigInt()) { |
| 5323 | return this; |
| 5324 | } |
| 5325 | |
| 5326 | // Unwrap MIntPtrToBigInt on both sides and perform an IntPtr comparison. |
| 5327 | if (left->isIntPtrToBigInt() && right->isIntPtrToBigInt()) { |
| 5328 | auto* lhsIntPtr = left->toIntPtrToBigInt(); |
| 5329 | auto* rhsIntPtr = right->toIntPtrToBigInt(); |
| 5330 | |
| 5331 | return MCompare::New(alloc, lhsIntPtr->input(), rhsIntPtr->input(), jsop_, |
| 5332 | MCompare::Compare_IntPtr); |
| 5333 | } |
| 5334 | |
| 5335 | // The other operand must be a constant. |
| 5336 | if (!left->isConstant() && !right->isConstant()) { |
| 5337 | return this; |
| 5338 | } |
| 5339 | |
| 5340 | auto* intPtrToBigInt = left->isIntPtrToBigInt() ? left->toIntPtrToBigInt() |
| 5341 | : right->toIntPtrToBigInt(); |
| 5342 | |
| 5343 | auto* constant = |
| 5344 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5345 | auto* bigInt = constant->toBigInt(); |
| 5346 | |
| 5347 | // Extract the BigInt value if representable as intptr_t. |
| 5348 | intptr_t value; |
| 5349 | if (!BigInt::isIntPtr(bigInt, &value)) { |
| 5350 | // The comparison is a constant if the BigInt has too many digits. |
| 5351 | int32_t repr = bigInt->isNegative() ? -1 : 1; |
| 5352 | |
| 5353 | bool result; |
| 5354 | if (left == intPtrToBigInt) { |
| 5355 | result = FoldComparison(jsop_, 0, repr); |
| 5356 | } else { |
| 5357 | result = FoldComparison(jsop_, repr, 0); |
| 5358 | } |
| 5359 | return MConstant::New(alloc, BooleanValue(result)); |
| 5360 | } |
| 5361 | |
| 5362 | auto* cst = MConstant::NewIntPtr(alloc, value); |
| 5363 | block()->insertBefore(this, cst); |
| 5364 | |
| 5365 | if (left == intPtrToBigInt) { |
| 5366 | left = intPtrToBigInt->input(); |
| 5367 | right = cst; |
| 5368 | } else { |
| 5369 | left = cst; |
| 5370 | right = intPtrToBigInt->input(); |
| 5371 | } |
| 5372 | return MCompare::New(alloc, left, right, jsop_, MCompare::Compare_IntPtr); |
| 5373 | } |
| 5374 | |
| 5375 | if (compareType() == Compare_BigInt_Int32) { |
| 5376 | auto* left = lhs(); |
| 5377 | MOZ_ASSERT(left->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5377); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5377; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5378 | |
| 5379 | auto* right = rhs(); |
| 5380 | MOZ_ASSERT(right->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5380); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 5380; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5381 | |
| 5382 | // Optimize MIntPtrToBigInt against a constant int32. |
| 5383 | if (!left->isIntPtrToBigInt() || !right->isConstant()) { |
| 5384 | return this; |
| 5385 | } |
| 5386 | |
| 5387 | auto* cst = |
| 5388 | MConstant::NewIntPtr(alloc, intptr_t(right->toConstant()->toInt32())); |
| 5389 | block()->insertBefore(this, cst); |
| 5390 | |
| 5391 | return MCompare::New(alloc, left->toIntPtrToBigInt()->input(), cst, jsop_, |
| 5392 | MCompare::Compare_IntPtr); |
| 5393 | } |
| 5394 | |
| 5395 | return this; |
| 5396 | } |
| 5397 | |
| 5398 | MDefinition* MCompare::tryFoldBigInt(TempAllocator& alloc) { |
| 5399 | if (compareType() != Compare_BigInt) { |
| 5400 | return this; |
| 5401 | } |
| 5402 | |
| 5403 | auto* left = lhs(); |
| 5404 | MOZ_ASSERT(left->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(left->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(left->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("left->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5404); AnnotateMozCrashReason("MOZ_ASSERT" "(" "left->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5404; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5405 | |
| 5406 | auto* right = rhs(); |
| 5407 | MOZ_ASSERT(right->type() == MIRType::BigInt)do { static_assert( mozilla::detail::AssertionConditionType< decltype(right->type() == MIRType::BigInt)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(right->type() == MIRType:: BigInt))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("right->type() == MIRType::BigInt", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5407); AnnotateMozCrashReason("MOZ_ASSERT" "(" "right->type() == MIRType::BigInt" ")"); do { *((volatile int*)__null) = 5407; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5408 | |
| 5409 | // One operand must be a constant. |
| 5410 | if (!left->isConstant() && !right->isConstant()) { |
| 5411 | return this; |
| 5412 | } |
| 5413 | |
| 5414 | auto* constant = |
| 5415 | left->isConstant() ? left->toConstant() : right->toConstant(); |
| 5416 | auto* operand = left->isConstant() ? right : left; |
| 5417 | |
| 5418 | // The constant must be representable as an Int32. |
| 5419 | int32_t x; |
| 5420 | if (!BigInt::isInt32(constant->toBigInt(), &x)) { |
| 5421 | return this; |
| 5422 | } |
| 5423 | |
| 5424 | MConstant* int32Const = MConstant::New(alloc, Int32Value(x)); |
| 5425 | block()->insertBefore(this, int32Const); |
| 5426 | |
| 5427 | auto op = jsop(); |
| 5428 | if (IsStrictEqualityOp(op)) { |
| 5429 | // Compare_BigInt_Int32 is only valid for loose comparison. |
| 5430 | op = op == JSOp::StrictEq ? JSOp::Eq : JSOp::Ne; |
| 5431 | } else if (operand == right) { |
| 5432 | // Reverse the comparison operator if the operands were reordered. |
| 5433 | op = ReverseCompareOp(op); |
| 5434 | } |
| 5435 | |
| 5436 | return MCompare::New(alloc, operand, int32Const, op, |
| 5437 | MCompare::Compare_BigInt_Int32); |
| 5438 | } |
| 5439 | |
| 5440 | MDefinition* MCompare::foldsTo(TempAllocator& alloc) { |
| 5441 | bool result; |
| 5442 | |
| 5443 | if (tryFold(&result) || evaluateConstantOperands(alloc, &result)) { |
| 5444 | if (type() == MIRType::Int32) { |
| 5445 | return MConstant::New(alloc, Int32Value(result)); |
| 5446 | } |
| 5447 | |
| 5448 | MOZ_ASSERT(type() == MIRType::Boolean)do { static_assert( mozilla::detail::AssertionConditionType< decltype(type() == MIRType::Boolean)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(type() == MIRType::Boolean)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("type() == MIRType::Boolean" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5448); AnnotateMozCrashReason("MOZ_ASSERT" "(" "type() == MIRType::Boolean" ")"); do { *((volatile int*)__null) = 5448; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5449 | return MConstant::New(alloc, BooleanValue(result)); |
| 5450 | } |
| 5451 | |
| 5452 | if (MDefinition* folded = tryFoldTypeOf(alloc); folded != this) { |
| 5453 | return folded; |
| 5454 | } |
| 5455 | |
| 5456 | if (MDefinition* folded = tryFoldCharCompare(alloc); folded != this) { |
| 5457 | return folded; |
| 5458 | } |
| 5459 | |
| 5460 | if (MDefinition* folded = tryFoldStringCompare(alloc); folded != this) { |
| 5461 | return folded; |
| 5462 | } |
| 5463 | |
| 5464 | if (MDefinition* folded = tryFoldStringSubstring(alloc); folded != this) { |
| 5465 | return folded; |
| 5466 | } |
| 5467 | |
| 5468 | if (MDefinition* folded = tryFoldStringIndexOf(alloc); folded != this) { |
| 5469 | return folded; |
| 5470 | } |
| 5471 | |
| 5472 | if (MDefinition* folded = tryFoldBigInt64(alloc); folded != this) { |
| 5473 | return folded; |
| 5474 | } |
| 5475 | |
| 5476 | if (MDefinition* folded = tryFoldBigIntPtr(alloc); folded != this) { |
| 5477 | return folded; |
| 5478 | } |
| 5479 | |
| 5480 | if (MDefinition* folded = tryFoldBigInt(alloc); folded != this) { |
| 5481 | return folded; |
| 5482 | } |
| 5483 | |
| 5484 | return this; |
| 5485 | } |
| 5486 | |
| 5487 | void MCompare::trySpecializeFloat32(TempAllocator& alloc) { |
| 5488 | if (AllOperandsCanProduceFloat32(this) && compareType_ == Compare_Double) { |
| 5489 | compareType_ = Compare_Float32; |
| 5490 | } else { |
| 5491 | ConvertOperandsToDouble(this, alloc); |
| 5492 | } |
| 5493 | } |
| 5494 | |
| 5495 | MDefinition* MNot::foldsTo(TempAllocator& alloc) { |
| 5496 | // Fold if the input is constant |
| 5497 | if (MConstant* inputConst = input()->maybeConstantValue()) { |
| 5498 | bool b; |
| 5499 | if (inputConst->valueToBoolean(&b)) { |
| 5500 | if (type() == MIRType::Int32 || type() == MIRType::Int64) { |
| 5501 | return MConstant::New(alloc, Int32Value(!b)); |
| 5502 | } |
| 5503 | return MConstant::New(alloc, BooleanValue(!b)); |
| 5504 | } |
| 5505 | } |
| 5506 | |
| 5507 | // If the operand of the Not is itself a Not, they cancel out. But we can't |
| 5508 | // always convert Not(Not(x)) to x because that may loose the conversion to |
| 5509 | // boolean. We can simplify Not(Not(Not(x))) to Not(x) though. |
| 5510 | MDefinition* op = getOperand(0); |
| 5511 | if (op->isNot()) { |
| 5512 | MDefinition* opop = op->getOperand(0); |
| 5513 | if (opop->isNot()) { |
| 5514 | return opop; |
| 5515 | } |
| 5516 | } |
| 5517 | |
| 5518 | // Not of an undefined or null value is always true |
| 5519 | if (input()->type() == MIRType::Undefined || |
| 5520 | input()->type() == MIRType::Null) { |
| 5521 | return MConstant::New(alloc, BooleanValue(true)); |
| 5522 | } |
| 5523 | |
| 5524 | // Not of a symbol is always false. |
| 5525 | if (input()->type() == MIRType::Symbol) { |
| 5526 | return MConstant::New(alloc, BooleanValue(false)); |
| 5527 | } |
| 5528 | |
| 5529 | // Drop the conversion in `Not(Int64ToBigInt(int64))` to `Not(int64)`. |
| 5530 | if (input()->isInt64ToBigInt()) { |
| 5531 | return MNot::New(alloc, input()->toInt64ToBigInt()->input()); |
| 5532 | } |
| 5533 | |
| 5534 | // Drop the conversion in `Not(IntPtrToBigInt(intptr))` to `Not(intptr)`. |
| 5535 | if (input()->isIntPtrToBigInt()) { |
| 5536 | return MNot::New(alloc, input()->toIntPtrToBigInt()->input()); |
| 5537 | } |
| 5538 | |
| 5539 | return this; |
| 5540 | } |
| 5541 | |
| 5542 | void MNot::trySpecializeFloat32(TempAllocator& alloc) { |
| 5543 | (void)EnsureFloatInputOrConvert(this, alloc); |
| 5544 | } |
| 5545 | |
| 5546 | #ifdef JS_JITSPEW1 |
| 5547 | void MBeta::printOpcode(GenericPrinter& out) const { |
| 5548 | MDefinition::printOpcode(out); |
| 5549 | |
| 5550 | out.printf(" "); |
| 5551 | comparison_->dump(out); |
| 5552 | } |
| 5553 | #endif |
| 5554 | |
| 5555 | AliasSet MCreateThis::getAliasSet() const { |
| 5556 | return AliasSet::Load(AliasSet::Any); |
| 5557 | } |
| 5558 | |
| 5559 | bool MGetArgumentsObjectArg::congruentTo(const MDefinition* ins) const { |
| 5560 | if (!ins->isGetArgumentsObjectArg()) { |
| 5561 | return false; |
| 5562 | } |
| 5563 | if (ins->toGetArgumentsObjectArg()->argno() != argno()) { |
| 5564 | return false; |
| 5565 | } |
| 5566 | return congruentIfOperandsEqual(ins); |
| 5567 | } |
| 5568 | |
| 5569 | AliasSet MGetArgumentsObjectArg::getAliasSet() const { |
| 5570 | return AliasSet::Load(AliasSet::Any); |
| 5571 | } |
| 5572 | |
| 5573 | AliasSet MSetArgumentsObjectArg::getAliasSet() const { |
| 5574 | return AliasSet::Store(AliasSet::Any); |
| 5575 | } |
| 5576 | |
| 5577 | MObjectState::MObjectState(MObjectState* state) |
| 5578 | : MVariadicInstruction(classOpcode), |
| 5579 | numSlots_(state->numSlots_), |
| 5580 | numFixedSlots_(state->numFixedSlots_) { |
| 5581 | // This instruction is only used as a summary for bailout paths. |
| 5582 | setResultType(MIRType::Object); |
| 5583 | setRecoveredOnBailout(); |
| 5584 | } |
| 5585 | |
| 5586 | MObjectState::MObjectState(JSObject* templateObject) |
| 5587 | : MObjectState(templateObject->as<NativeObject>().shape()) {} |
| 5588 | |
| 5589 | MObjectState::MObjectState(const Shape* shape) |
| 5590 | : MVariadicInstruction(classOpcode) { |
| 5591 | // This instruction is only used as a summary for bailout paths. |
| 5592 | setResultType(MIRType::Object); |
| 5593 | setRecoveredOnBailout(); |
| 5594 | |
| 5595 | numSlots_ = shape->asShared().slotSpan(); |
| 5596 | numFixedSlots_ = shape->asShared().numFixedSlots(); |
| 5597 | } |
| 5598 | |
| 5599 | /* static */ |
| 5600 | JSObject* MObjectState::templateObjectOf(MDefinition* obj) { |
| 5601 | // MNewPlainObject uses a shape constant, not an object. |
| 5602 | MOZ_ASSERT(!obj->isNewPlainObject())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!obj->isNewPlainObject())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!obj->isNewPlainObject()) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!obj->isNewPlainObject()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5602); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!obj->isNewPlainObject()" ")"); do { *((volatile int*)__null) = 5602; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5603 | |
| 5604 | if (obj->isNewObject()) { |
| 5605 | return obj->toNewObject()->templateObject(); |
| 5606 | } else if (obj->isNewCallObject()) { |
| 5607 | return obj->toNewCallObject()->templateObject(); |
| 5608 | } else if (obj->isNewIterator()) { |
| 5609 | return obj->toNewIterator()->templateObject(); |
| 5610 | } |
| 5611 | |
| 5612 | MOZ_CRASH("unreachable")do { do { } while (false); MOZ_ReportCrash("" "unreachable", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5612); AnnotateMozCrashReason("MOZ_CRASH(" "unreachable" ")" ); do { *((volatile int*)__null) = 5612; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 5613 | } |
| 5614 | |
| 5615 | bool MObjectState::init(TempAllocator& alloc, MDefinition* obj) { |
| 5616 | if (!MVariadicInstruction::init(alloc, numSlots() + 1)) { |
| 5617 | return false; |
| 5618 | } |
| 5619 | // +1, for the Object. |
| 5620 | initOperand(0, obj); |
| 5621 | return true; |
| 5622 | } |
| 5623 | |
| 5624 | void MObjectState::initFromTemplateObject(TempAllocator& alloc, |
| 5625 | MDefinition* undefinedVal) { |
| 5626 | if (object()->isNewPlainObject()) { |
| 5627 | MOZ_ASSERT(object()->toNewPlainObject()->shape()->asShared().slotSpan() ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(object()->toNewPlainObject()->shape()->asShared ().slotSpan() == numSlots())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(object()->toNewPlainObject ()->shape()->asShared().slotSpan() == numSlots()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("object()->toNewPlainObject()->shape()->asShared().slotSpan() == numSlots()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5628); AnnotateMozCrashReason("MOZ_ASSERT" "(" "object()->toNewPlainObject()->shape()->asShared().slotSpan() == numSlots()" ")"); do { *((volatile int*)__null) = 5628; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 5628 | numSlots())do { static_assert( mozilla::detail::AssertionConditionType< decltype(object()->toNewPlainObject()->shape()->asShared ().slotSpan() == numSlots())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(object()->toNewPlainObject ()->shape()->asShared().slotSpan() == numSlots()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("object()->toNewPlainObject()->shape()->asShared().slotSpan() == numSlots()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5628); AnnotateMozCrashReason("MOZ_ASSERT" "(" "object()->toNewPlainObject()->shape()->asShared().slotSpan() == numSlots()" ")"); do { *((volatile int*)__null) = 5628; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5629 | for (size_t i = 0; i < numSlots(); i++) { |
| 5630 | initSlot(i, undefinedVal); |
| 5631 | } |
| 5632 | return; |
| 5633 | } |
| 5634 | |
| 5635 | JSObject* templateObject = templateObjectOf(object()); |
| 5636 | |
| 5637 | // Initialize all the slots of the object state with the value contained in |
| 5638 | // the template object. This is needed to account values which are baked in |
| 5639 | // the template objects and not visible in IonMonkey, such as the |
| 5640 | // uninitialized-lexical magic value of call objects. |
| 5641 | |
| 5642 | MOZ_ASSERT(templateObject->is<NativeObject>())do { static_assert( mozilla::detail::AssertionConditionType< decltype(templateObject->is<NativeObject>())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(templateObject->is<NativeObject>()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("templateObject->is<NativeObject>()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5642); AnnotateMozCrashReason("MOZ_ASSERT" "(" "templateObject->is<NativeObject>()" ")"); do { *((volatile int*)__null) = 5642; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5643 | NativeObject& nativeObject = templateObject->as<NativeObject>(); |
| 5644 | MOZ_ASSERT(nativeObject.slotSpan() == numSlots())do { static_assert( mozilla::detail::AssertionConditionType< decltype(nativeObject.slotSpan() == numSlots())>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(nativeObject.slotSpan() == numSlots()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("nativeObject.slotSpan() == numSlots()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5644); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nativeObject.slotSpan() == numSlots()" ")"); do { *((volatile int*)__null) = 5644; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5645 | |
| 5646 | for (size_t i = 0; i < numSlots(); i++) { |
| 5647 | Value val = nativeObject.getSlot(i); |
| 5648 | MDefinition* def = undefinedVal; |
| 5649 | if (!val.isUndefined()) { |
| 5650 | MConstant* ins = MConstant::New(alloc, val); |
| 5651 | block()->insertBefore(this, ins); |
| 5652 | def = ins; |
| 5653 | } |
| 5654 | initSlot(i, def); |
| 5655 | } |
| 5656 | } |
| 5657 | |
| 5658 | MObjectState* MObjectState::New(TempAllocator& alloc, MDefinition* obj) { |
| 5659 | MObjectState* res; |
| 5660 | if (obj->isNewPlainObject()) { |
| 5661 | const Shape* shape = obj->toNewPlainObject()->shape(); |
| 5662 | res = new (alloc) MObjectState(shape); |
| 5663 | } else { |
| 5664 | JSObject* templateObject = templateObjectOf(obj); |
| 5665 | MOZ_ASSERT(templateObject, "Unexpected object creation.")do { static_assert( mozilla::detail::AssertionConditionType< decltype(templateObject)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(templateObject))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("templateObject" " (" "Unexpected object creation." ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 5665); AnnotateMozCrashReason("MOZ_ASSERT" "(" "templateObject" ") (" "Unexpected object creation." ")"); do { *((volatile int *)__null) = 5665; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 5666 | res = new (alloc) MObjectState(templateObject); |
| 5667 | } |
| 5668 | |
| 5669 | if (!res || !res->init(alloc, obj)) { |
| 5670 | return nullptr; |
| 5671 | } |
| 5672 | return res; |
| 5673 | } |
| 5674 | |
| 5675 | MObjectState* MObjectState::Copy(TempAllocator& alloc, MObjectState* state) { |
| 5676 | MObjectState* res = new (alloc) MObjectState(state); |
| 5677 | if (!res || !res->init(alloc, state->object())) { |
| 5678 | return nullptr; |
| 5679 | } |
| 5680 | for (size_t i = 0; i < res->numSlots(); i++) { |
| 5681 | res->initSlot(i, state->getSlot(i)); |
| 5682 | } |
| 5683 | return res; |
| 5684 | } |
| 5685 | |
| 5686 | MArrayState::MArrayState(MDefinition* arr) : MVariadicInstruction(classOpcode) { |
| 5687 | // This instruction is only used as a summary for bailout paths. |
| 5688 | setResultType(MIRType::Object); |
| 5689 | setRecoveredOnBailout(); |
| 5690 | if (arr->isNewArrayObject()) { |
| 5691 | numElements_ = arr->toNewArrayObject()->length(); |
| 5692 | } else { |
| 5693 | numElements_ = arr->toNewArray()->length(); |
| 5694 | } |
| 5695 | } |
| 5696 | |
| 5697 | bool MArrayState::init(TempAllocator& alloc, MDefinition* obj, |
| 5698 | MDefinition* len) { |
| 5699 | if (!MVariadicInstruction::init(alloc, numElements() + 2)) { |
| 5700 | return false; |
| 5701 | } |
| 5702 | // +1, for the Array object. |
| 5703 | initOperand(0, obj); |
| 5704 | // +1, for the length value of the array. |
| 5705 | initOperand(1, len); |
| 5706 | return true; |
| 5707 | } |
| 5708 | |
| 5709 | void MArrayState::initFromTemplateObject(TempAllocator& alloc, |
| 5710 | MDefinition* undefinedVal) { |
| 5711 | for (size_t i = 0; i < numElements(); i++) { |
| 5712 | initElement(i, undefinedVal); |
| 5713 | } |
| 5714 | } |
| 5715 | |
| 5716 | MArrayState* MArrayState::New(TempAllocator& alloc, MDefinition* arr, |
| 5717 | MDefinition* initLength) { |
| 5718 | MArrayState* res = new (alloc) MArrayState(arr); |
| 5719 | if (!res || !res->init(alloc, arr, initLength)) { |
| 5720 | return nullptr; |
| 5721 | } |
| 5722 | return res; |
| 5723 | } |
| 5724 | |
| 5725 | MArrayState* MArrayState::Copy(TempAllocator& alloc, MArrayState* state) { |
| 5726 | MDefinition* arr = state->array(); |
| 5727 | MDefinition* len = state->initializedLength(); |
| 5728 | MArrayState* res = new (alloc) MArrayState(arr); |
| 5729 | if (!res || !res->init(alloc, arr, len)) { |
| 5730 | return nullptr; |
| 5731 | } |
| 5732 | for (size_t i = 0; i < res->numElements(); i++) { |
| 5733 | res->initElement(i, state->getElement(i)); |
| 5734 | } |
| 5735 | return res; |
| 5736 | } |
| 5737 | |
| 5738 | MNewArray::MNewArray(uint32_t length, MConstant* templateConst, |
| 5739 | gc::Heap initialHeap, bool vmCall) |
| 5740 | : MUnaryInstruction(classOpcode, templateConst), |
| 5741 | length_(length), |
| 5742 | initialHeap_(initialHeap), |
| 5743 | vmCall_(vmCall) { |
| 5744 | setResultType(MIRType::Object); |
| 5745 | } |
| 5746 | |
| 5747 | MDefinition::AliasType MLoadFixedSlot::mightAlias( |
| 5748 | const MDefinition* def) const { |
| 5749 | if (def->isStoreFixedSlot()) { |
| 5750 | const MStoreFixedSlot* store = def->toStoreFixedSlot(); |
| 5751 | if (store->slot() != slot()) { |
| 5752 | return AliasType::NoAlias; |
| 5753 | } |
| 5754 | if (store->object() != object()) { |
| 5755 | return AliasType::MayAlias; |
| 5756 | } |
| 5757 | return AliasType::MustAlias; |
| 5758 | } |
| 5759 | return AliasType::MayAlias; |
| 5760 | } |
| 5761 | |
| 5762 | MDefinition* MLoadFixedSlot::foldsTo(TempAllocator& alloc) { |
| 5763 | if (MDefinition* def = foldsToStore(alloc)) { |
| 5764 | return def; |
| 5765 | } |
| 5766 | |
| 5767 | return this; |
| 5768 | } |
| 5769 | |
| 5770 | MDefinition::AliasType MLoadFixedSlotAndUnbox::mightAlias( |
| 5771 | const MDefinition* def) const { |
| 5772 | if (def->isStoreFixedSlot()) { |
| 5773 | const MStoreFixedSlot* store = def->toStoreFixedSlot(); |
| 5774 | if (store->slot() != slot()) { |
| 5775 | return AliasType::NoAlias; |
| 5776 | } |
| 5777 | if (store->object() != object()) { |
| 5778 | return AliasType::MayAlias; |
| 5779 | } |
| 5780 | return AliasType::MustAlias; |
| 5781 | } |
| 5782 | return AliasType::MayAlias; |
| 5783 | } |
| 5784 | |
| 5785 | MDefinition* MLoadFixedSlotAndUnbox::foldsTo(TempAllocator& alloc) { |
| 5786 | if (MDefinition* def = foldsToStore(alloc)) { |
| 5787 | return def; |
| 5788 | } |
| 5789 | |
| 5790 | return this; |
| 5791 | } |
| 5792 | |
| 5793 | MDefinition::AliasType MLoadDynamicSlot::mightAlias( |
| 5794 | const MDefinition* def) const { |
| 5795 | if (def->isStoreDynamicSlot()) { |
| 5796 | const MStoreDynamicSlot* store = def->toStoreDynamicSlot(); |
| 5797 | if (store->slot() != slot()) { |
| 5798 | return AliasType::NoAlias; |
| 5799 | } |
| 5800 | |
| 5801 | if (store->slots() != slots()) { |
| 5802 | return AliasType::MayAlias; |
| 5803 | } |
| 5804 | |
| 5805 | return AliasType::MustAlias; |
| 5806 | } |
| 5807 | return AliasType::MayAlias; |
| 5808 | } |
| 5809 | |
| 5810 | HashNumber MLoadDynamicSlot::valueHash() const { |
| 5811 | HashNumber hash = MDefinition::valueHash(); |
| 5812 | hash = addU32ToHash(hash, slot_); |
| 5813 | return hash; |
| 5814 | } |
| 5815 | |
| 5816 | MDefinition* MLoadDynamicSlot::foldsTo(TempAllocator& alloc) { |
| 5817 | if (MDefinition* def = foldsToStore(alloc)) { |
| 5818 | return def; |
| 5819 | } |
| 5820 | |
| 5821 | return this; |
| 5822 | } |
| 5823 | |
| 5824 | #ifdef JS_JITSPEW1 |
| 5825 | void MLoadDynamicSlot::printOpcode(GenericPrinter& out) const { |
| 5826 | MDefinition::printOpcode(out); |
| 5827 | out.printf(" (slot %u)", slot()); |
| 5828 | } |
| 5829 | |
| 5830 | void MLoadDynamicSlotAndUnbox::printOpcode(GenericPrinter& out) const { |
| 5831 | MDefinition::printOpcode(out); |
| 5832 | out.printf(" (slot %zu)", slot()); |
| 5833 | } |
| 5834 | |
| 5835 | void MStoreDynamicSlot::printOpcode(GenericPrinter& out) const { |
| 5836 | MDefinition::printOpcode(out); |
| 5837 | out.printf(" (slot %u)", slot()); |
| 5838 | } |
| 5839 | |
| 5840 | void MLoadFixedSlot::printOpcode(GenericPrinter& out) const { |
| 5841 | MDefinition::printOpcode(out); |
| 5842 | out.printf(" (slot %zu)", slot()); |
| 5843 | } |
| 5844 | |
| 5845 | void MLoadFixedSlotAndUnbox::printOpcode(GenericPrinter& out) const { |
| 5846 | MDefinition::printOpcode(out); |
| 5847 | out.printf(" (slot %zu)", slot()); |
| 5848 | } |
| 5849 | |
| 5850 | void MStoreFixedSlot::printOpcode(GenericPrinter& out) const { |
| 5851 | MDefinition::printOpcode(out); |
| 5852 | out.printf(" (slot %zu)", slot()); |
| 5853 | } |
| 5854 | #endif |
| 5855 | |
| 5856 | MDefinition* MGuardFunctionScript::foldsTo(TempAllocator& alloc) { |
| 5857 | MDefinition* in = input(); |
| 5858 | if (in->isLambda() && |
| 5859 | in->toLambda()->templateFunction()->baseScript() == expected()) { |
| 5860 | return in; |
| 5861 | } |
| 5862 | return this; |
| 5863 | } |
| 5864 | |
| 5865 | MDefinition* MFunctionEnvironment::foldsTo(TempAllocator& alloc) { |
| 5866 | if (input()->isLambda()) { |
| 5867 | return input()->toLambda()->environmentChain(); |
| 5868 | } |
| 5869 | if (input()->isFunctionWithProto()) { |
| 5870 | return input()->toFunctionWithProto()->environmentChain(); |
| 5871 | } |
| 5872 | return this; |
| 5873 | } |
| 5874 | |
| 5875 | static bool AddIsANonZeroAdditionOf(MAdd* add, MDefinition* ins) { |
| 5876 | if (add->lhs() != ins && add->rhs() != ins) { |
| 5877 | return false; |
| 5878 | } |
| 5879 | MDefinition* other = (add->lhs() == ins) ? add->rhs() : add->lhs(); |
| 5880 | if (!IsNumberType(other->type())) { |
| 5881 | return false; |
| 5882 | } |
| 5883 | if (!other->isConstant()) { |
| 5884 | return false; |
| 5885 | } |
| 5886 | if (other->toConstant()->numberToDouble() == 0) { |
| 5887 | return false; |
| 5888 | } |
| 5889 | return true; |
| 5890 | } |
| 5891 | |
| 5892 | // Skip over instructions that usually appear between the actual index |
| 5893 | // value being used and the MLoadElement. |
| 5894 | // They don't modify the index value in a meaningful way. |
| 5895 | static MDefinition* SkipUninterestingInstructions(MDefinition* ins) { |
| 5896 | // Drop the MToNumberInt32 added by the TypePolicy for double and float |
| 5897 | // values. |
| 5898 | if (ins->isToNumberInt32()) { |
| 5899 | return SkipUninterestingInstructions(ins->toToNumberInt32()->input()); |
| 5900 | } |
| 5901 | |
| 5902 | // Ignore the bounds check, which don't modify the index. |
| 5903 | if (ins->isBoundsCheck()) { |
| 5904 | return SkipUninterestingInstructions(ins->toBoundsCheck()->index()); |
| 5905 | } |
| 5906 | |
| 5907 | // Masking the index for Spectre-mitigation is not observable. |
| 5908 | if (ins->isSpectreMaskIndex()) { |
| 5909 | return SkipUninterestingInstructions(ins->toSpectreMaskIndex()->index()); |
| 5910 | } |
| 5911 | |
| 5912 | return ins; |
| 5913 | } |
| 5914 | |
| 5915 | static bool DefinitelyDifferentValue(MDefinition* ins1, MDefinition* ins2) { |
| 5916 | ins1 = SkipUninterestingInstructions(ins1); |
| 5917 | ins2 = SkipUninterestingInstructions(ins2); |
| 5918 | |
| 5919 | if (ins1 == ins2) { |
| 5920 | return false; |
| 5921 | } |
| 5922 | |
| 5923 | // For constants check they are not equal. |
| 5924 | if (ins1->isConstant() && ins2->isConstant()) { |
| 5925 | MConstant* cst1 = ins1->toConstant(); |
| 5926 | MConstant* cst2 = ins2->toConstant(); |
| 5927 | |
| 5928 | if (!cst1->isTypeRepresentableAsDouble() || |
| 5929 | !cst2->isTypeRepresentableAsDouble()) { |
| 5930 | return false; |
| 5931 | } |
| 5932 | |
| 5933 | // Be conservative and only allow values that fit into int32. |
| 5934 | int32_t n1, n2; |
| 5935 | if (!mozilla::NumberIsInt32(cst1->numberToDouble(), &n1) || |
| 5936 | !mozilla::NumberIsInt32(cst2->numberToDouble(), &n2)) { |
| 5937 | return false; |
| 5938 | } |
| 5939 | |
| 5940 | return n1 != n2; |
| 5941 | } |
| 5942 | |
| 5943 | // Check if "ins1 = ins2 + cte", which would make both instructions |
| 5944 | // have different values. |
| 5945 | if (ins1->isAdd()) { |
| 5946 | if (AddIsANonZeroAdditionOf(ins1->toAdd(), ins2)) { |
| 5947 | return true; |
| 5948 | } |
| 5949 | } |
| 5950 | if (ins2->isAdd()) { |
| 5951 | if (AddIsANonZeroAdditionOf(ins2->toAdd(), ins1)) { |
| 5952 | return true; |
| 5953 | } |
| 5954 | } |
| 5955 | |
| 5956 | return false; |
| 5957 | } |
| 5958 | |
| 5959 | MDefinition::AliasType MLoadElement::mightAlias(const MDefinition* def) const { |
| 5960 | if (def->isStoreElement()) { |
| 5961 | const MStoreElement* store = def->toStoreElement(); |
| 5962 | if (store->index() != index()) { |
| 5963 | if (DefinitelyDifferentValue(store->index(), index())) { |
| 5964 | return AliasType::NoAlias; |
| 5965 | } |
| 5966 | return AliasType::MayAlias; |
| 5967 | } |
| 5968 | |
| 5969 | if (store->elements() != elements()) { |
| 5970 | return AliasType::MayAlias; |
| 5971 | } |
| 5972 | |
| 5973 | return AliasType::MustAlias; |
| 5974 | } |
| 5975 | return AliasType::MayAlias; |
| 5976 | } |
| 5977 | |
| 5978 | MDefinition* MLoadElement::foldsTo(TempAllocator& alloc) { |
| 5979 | if (MDefinition* def = foldsToStore(alloc)) { |
| 5980 | return def; |
| 5981 | } |
| 5982 | |
| 5983 | return this; |
| 5984 | } |
| 5985 | |
| 5986 | void MSqrt::trySpecializeFloat32(TempAllocator& alloc) { |
| 5987 | if (EnsureFloatConsumersAndInputOrConvert(this, alloc)) { |
| 5988 | setResultType(MIRType::Float32); |
| 5989 | specialization_ = MIRType::Float32; |
| 5990 | } |
| 5991 | } |
| 5992 | |
| 5993 | MDefinition* MClz::foldsTo(TempAllocator& alloc) { |
| 5994 | if (num()->isConstant()) { |
| 5995 | MConstant* c = num()->toConstant(); |
| 5996 | if (type() == MIRType::Int32) { |
| 5997 | int32_t n = c->toInt32(); |
| 5998 | if (n == 0) { |
| 5999 | return MConstant::New(alloc, Int32Value(32)); |
| 6000 | } |
| 6001 | return MConstant::New(alloc, |
| 6002 | Int32Value(mozilla::CountLeadingZeroes32(n))); |
| 6003 | } |
| 6004 | int64_t n = c->toInt64(); |
| 6005 | if (n == 0) { |
| 6006 | return MConstant::NewInt64(alloc, int64_t(64)); |
| 6007 | } |
| 6008 | return MConstant::NewInt64(alloc, |
| 6009 | int64_t(mozilla::CountLeadingZeroes64(n))); |
| 6010 | } |
| 6011 | |
| 6012 | return this; |
| 6013 | } |
| 6014 | |
| 6015 | MDefinition* MCtz::foldsTo(TempAllocator& alloc) { |
| 6016 | if (num()->isConstant()) { |
| 6017 | MConstant* c = num()->toConstant(); |
| 6018 | if (type() == MIRType::Int32) { |
| 6019 | int32_t n = num()->toConstant()->toInt32(); |
| 6020 | if (n == 0) { |
| 6021 | return MConstant::New(alloc, Int32Value(32)); |
| 6022 | } |
| 6023 | return MConstant::New(alloc, |
| 6024 | Int32Value(mozilla::CountTrailingZeroes32(n))); |
| 6025 | } |
| 6026 | int64_t n = c->toInt64(); |
| 6027 | if (n == 0) { |
| 6028 | return MConstant::NewInt64(alloc, int64_t(64)); |
| 6029 | } |
| 6030 | return MConstant::NewInt64(alloc, |
| 6031 | int64_t(mozilla::CountTrailingZeroes64(n))); |
| 6032 | } |
| 6033 | |
| 6034 | return this; |
| 6035 | } |
| 6036 | |
| 6037 | MDefinition* MPopcnt::foldsTo(TempAllocator& alloc) { |
| 6038 | if (num()->isConstant()) { |
| 6039 | MConstant* c = num()->toConstant(); |
| 6040 | if (type() == MIRType::Int32) { |
| 6041 | int32_t n = num()->toConstant()->toInt32(); |
| 6042 | return MConstant::New(alloc, Int32Value(mozilla::CountPopulation32(n))); |
| 6043 | } |
| 6044 | int64_t n = c->toInt64(); |
| 6045 | return MConstant::NewInt64(alloc, int64_t(mozilla::CountPopulation64(n))); |
| 6046 | } |
| 6047 | |
| 6048 | return this; |
| 6049 | } |
| 6050 | |
| 6051 | MDefinition* MBoundsCheck::foldsTo(TempAllocator& alloc) { |
| 6052 | if (type() == MIRType::Int32 && index()->isConstant() && |
| 6053 | length()->isConstant()) { |
| 6054 | uint32_t len = length()->toConstant()->toInt32(); |
| 6055 | uint32_t idx = index()->toConstant()->toInt32(); |
| 6056 | if (idx + uint32_t(minimum()) < len && idx + uint32_t(maximum()) < len) { |
| 6057 | return index(); |
| 6058 | } |
| 6059 | } |
| 6060 | |
| 6061 | return this; |
| 6062 | } |
| 6063 | |
| 6064 | MDefinition* MTableSwitch::foldsTo(TempAllocator& alloc) { |
| 6065 | MDefinition* op = getOperand(0); |
| 6066 | |
| 6067 | // If we only have one successor, convert to a plain goto to the only |
| 6068 | // successor. TableSwitch indices are numeric; other types will always go to |
| 6069 | // the only successor. |
| 6070 | if (numSuccessors() == 1 || |
| 6071 | (op->type() != MIRType::Value && !IsNumberType(op->type()))) { |
| 6072 | return MGoto::New(alloc, getDefault()); |
| 6073 | } |
| 6074 | |
| 6075 | if (MConstant* opConst = op->maybeConstantValue()) { |
| 6076 | if (op->type() == MIRType::Int32) { |
| 6077 | int32_t i = opConst->toInt32() - low_; |
| 6078 | MBasicBlock* target; |
| 6079 | if (size_t(i) < numCases()) { |
| 6080 | target = getCase(size_t(i)); |
| 6081 | } else { |
| 6082 | target = getDefault(); |
| 6083 | } |
| 6084 | MOZ_ASSERT(target)do { static_assert( mozilla::detail::AssertionConditionType< decltype(target)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(target))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("target", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 6084); AnnotateMozCrashReason("MOZ_ASSERT" "(" "target" ")" ); do { *((volatile int*)__null) = 6084; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6085 | return MGoto::New(alloc, target); |
| 6086 | } |
| 6087 | } |
| 6088 | |
| 6089 | return this; |
| 6090 | } |
| 6091 | |
| 6092 | MDefinition* MArrayJoin::foldsTo(TempAllocator& alloc) { |
| 6093 | MDefinition* arr = array(); |
| 6094 | |
| 6095 | if (!arr->isStringSplit()) { |
| 6096 | return this; |
| 6097 | } |
| 6098 | |
| 6099 | setRecoveredOnBailout(); |
| 6100 | if (arr->hasLiveDefUses()) { |
| 6101 | setNotRecoveredOnBailout(); |
| 6102 | return this; |
| 6103 | } |
| 6104 | |
| 6105 | // The MStringSplit won't generate any code. |
| 6106 | arr->setRecoveredOnBailout(); |
| 6107 | |
| 6108 | // We're replacing foo.split(bar).join(baz) by |
| 6109 | // foo.replace(bar, baz). MStringSplit could be recovered by |
| 6110 | // a bailout. As we are removing its last use, and its result |
| 6111 | // could be captured by a resume point, this MStringSplit will |
| 6112 | // be executed on the bailout path. |
| 6113 | MDefinition* string = arr->toStringSplit()->string(); |
| 6114 | MDefinition* pattern = arr->toStringSplit()->separator(); |
| 6115 | MDefinition* replacement = sep(); |
| 6116 | |
| 6117 | MStringReplace* substr = |
| 6118 | MStringReplace::New(alloc, string, pattern, replacement); |
| 6119 | substr->setFlatReplacement(); |
| 6120 | return substr; |
| 6121 | } |
| 6122 | |
| 6123 | MDefinition* MGetFirstDollarIndex::foldsTo(TempAllocator& alloc) { |
| 6124 | MDefinition* strArg = str(); |
| 6125 | if (!strArg->isConstant()) { |
| 6126 | return this; |
| 6127 | } |
| 6128 | |
| 6129 | JSLinearString* str = &strArg->toConstant()->toString()->asLinear(); |
| 6130 | int32_t index = GetFirstDollarIndexRawFlat(str); |
| 6131 | return MConstant::New(alloc, Int32Value(index)); |
| 6132 | } |
| 6133 | |
| 6134 | AliasSet MThrowRuntimeLexicalError::getAliasSet() const { |
| 6135 | return AliasSet::Store(AliasSet::ExceptionState); |
| 6136 | } |
| 6137 | |
| 6138 | AliasSet MSlots::getAliasSet() const { |
| 6139 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6140 | } |
| 6141 | |
| 6142 | MDefinition::AliasType MSlots::mightAlias(const MDefinition* store) const { |
| 6143 | // ArrayPush only modifies object elements, but not object slots. |
| 6144 | if (store->isArrayPush()) { |
| 6145 | return AliasType::NoAlias; |
| 6146 | } |
| 6147 | return MInstruction::mightAlias(store); |
| 6148 | } |
| 6149 | |
| 6150 | AliasSet MElements::getAliasSet() const { |
| 6151 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6152 | } |
| 6153 | |
| 6154 | AliasSet MInitializedLength::getAliasSet() const { |
| 6155 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6156 | } |
| 6157 | |
| 6158 | AliasSet MSetInitializedLength::getAliasSet() const { |
| 6159 | return AliasSet::Store(AliasSet::ObjectFields); |
| 6160 | } |
| 6161 | |
| 6162 | AliasSet MObjectKeysLength::getAliasSet() const { |
| 6163 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6164 | } |
| 6165 | |
| 6166 | AliasSet MArrayLength::getAliasSet() const { |
| 6167 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6168 | } |
| 6169 | |
| 6170 | AliasSet MSetArrayLength::getAliasSet() const { |
| 6171 | return AliasSet::Store(AliasSet::ObjectFields); |
| 6172 | } |
| 6173 | |
| 6174 | AliasSet MFunctionLength::getAliasSet() const { |
| 6175 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6176 | AliasSet::DynamicSlot); |
| 6177 | } |
| 6178 | |
| 6179 | AliasSet MFunctionName::getAliasSet() const { |
| 6180 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6181 | AliasSet::DynamicSlot); |
| 6182 | } |
| 6183 | |
| 6184 | AliasSet MArrayBufferByteLength::getAliasSet() const { |
| 6185 | return AliasSet::Load(AliasSet::FixedSlot); |
| 6186 | } |
| 6187 | |
| 6188 | AliasSet MArrayBufferViewLength::getAliasSet() const { |
| 6189 | return AliasSet::Load(AliasSet::ArrayBufferViewLengthOrOffset); |
| 6190 | } |
| 6191 | |
| 6192 | AliasSet MArrayBufferViewByteOffset::getAliasSet() const { |
| 6193 | return AliasSet::Load(AliasSet::ArrayBufferViewLengthOrOffset); |
| 6194 | } |
| 6195 | |
| 6196 | AliasSet MArrayBufferViewElements::getAliasSet() const { |
| 6197 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6198 | } |
| 6199 | |
| 6200 | AliasSet MGuardHasAttachedArrayBuffer::getAliasSet() const { |
| 6201 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot); |
| 6202 | } |
| 6203 | |
| 6204 | AliasSet MResizableTypedArrayByteOffsetMaybeOutOfBounds::getAliasSet() const { |
| 6205 | // Loads the byteOffset and additionally checks for detached buffers, so the |
| 6206 | // alias set also has to include |ObjectFields| and |FixedSlot|. |
| 6207 | return AliasSet::Load(AliasSet::ArrayBufferViewLengthOrOffset | |
| 6208 | AliasSet::ObjectFields | AliasSet::FixedSlot); |
| 6209 | } |
| 6210 | |
| 6211 | AliasSet MResizableTypedArrayLength::getAliasSet() const { |
| 6212 | // Loads the length and byteOffset slots, the shared-elements flag, the |
| 6213 | // auto-length fixed slot, and the shared raw-buffer length. |
| 6214 | auto flags = AliasSet::ArrayBufferViewLengthOrOffset | |
| 6215 | AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6216 | AliasSet::SharedArrayRawBufferLength; |
| 6217 | |
| 6218 | // When a barrier is needed make the instruction effectful by giving it a |
| 6219 | // "store" effect. Also prevent reordering LoadUnboxedScalar before this |
| 6220 | // instruction by including |UnboxedElement| in the alias set. |
| 6221 | if (requiresMemoryBarrier() == MemoryBarrierRequirement::Required) { |
| 6222 | return AliasSet::Store(flags | AliasSet::UnboxedElement); |
| 6223 | } |
| 6224 | return AliasSet::Load(flags); |
| 6225 | } |
| 6226 | |
| 6227 | bool MResizableTypedArrayLength::congruentTo(const MDefinition* ins) const { |
| 6228 | if (requiresMemoryBarrier() == MemoryBarrierRequirement::Required) { |
| 6229 | return false; |
| 6230 | } |
| 6231 | return congruentIfOperandsEqual(ins); |
| 6232 | } |
| 6233 | |
| 6234 | AliasSet MResizableDataViewByteLength::getAliasSet() const { |
| 6235 | // Loads the length and byteOffset slots, the shared-elements flag, the |
| 6236 | // auto-length fixed slot, and the shared raw-buffer length. |
| 6237 | auto flags = AliasSet::ArrayBufferViewLengthOrOffset | |
| 6238 | AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6239 | AliasSet::SharedArrayRawBufferLength; |
| 6240 | |
| 6241 | // When a barrier is needed make the instruction effectful by giving it a |
| 6242 | // "store" effect. Also prevent reordering LoadUnboxedScalar before this |
| 6243 | // instruction by including |UnboxedElement| in the alias set. |
| 6244 | if (requiresMemoryBarrier() == MemoryBarrierRequirement::Required) { |
| 6245 | return AliasSet::Store(flags | AliasSet::UnboxedElement); |
| 6246 | } |
| 6247 | return AliasSet::Load(flags); |
| 6248 | } |
| 6249 | |
| 6250 | bool MResizableDataViewByteLength::congruentTo(const MDefinition* ins) const { |
| 6251 | if (requiresMemoryBarrier() == MemoryBarrierRequirement::Required) { |
| 6252 | return false; |
| 6253 | } |
| 6254 | return congruentIfOperandsEqual(ins); |
| 6255 | } |
| 6256 | |
| 6257 | AliasSet MGrowableSharedArrayBufferByteLength::getAliasSet() const { |
| 6258 | // Requires a barrier, so make the instruction effectful by giving it a |
| 6259 | // "store" effect. Also prevent reordering LoadUnboxedScalar before this |
| 6260 | // instruction by including |UnboxedElement| in the alias set. |
| 6261 | return AliasSet::Store(AliasSet::FixedSlot | |
| 6262 | AliasSet::SharedArrayRawBufferLength | |
| 6263 | AliasSet::UnboxedElement); |
| 6264 | } |
| 6265 | |
| 6266 | AliasSet MGuardResizableArrayBufferViewInBounds::getAliasSet() const { |
| 6267 | // Additionally reads the |initialLength| and |initialByteOffset| slots, but |
| 6268 | // since these can't change after construction, we don't need to track them. |
| 6269 | return AliasSet::Load(AliasSet::ArrayBufferViewLengthOrOffset); |
| 6270 | } |
| 6271 | |
| 6272 | AliasSet MGuardResizableArrayBufferViewInBoundsOrDetached::getAliasSet() const { |
| 6273 | // Loads the byteOffset and additionally checks for detached buffers, so the |
| 6274 | // alias set also has to include |ObjectFields| and |FixedSlot|. |
| 6275 | return AliasSet::Load(AliasSet::ArrayBufferViewLengthOrOffset | |
| 6276 | AliasSet::ObjectFields | AliasSet::FixedSlot); |
| 6277 | } |
| 6278 | |
| 6279 | AliasSet MArrayPush::getAliasSet() const { |
| 6280 | return AliasSet::Store(AliasSet::ObjectFields | AliasSet::Element); |
| 6281 | } |
| 6282 | |
| 6283 | MDefinition* MGuardNumberToIntPtrIndex::foldsTo(TempAllocator& alloc) { |
| 6284 | MDefinition* input = this->input(); |
| 6285 | |
| 6286 | if (input->isToDouble() && input->getOperand(0)->type() == MIRType::Int32) { |
| 6287 | return MInt32ToIntPtr::New(alloc, input->getOperand(0)); |
| 6288 | } |
| 6289 | |
| 6290 | if (!input->isConstant()) { |
| 6291 | return this; |
| 6292 | } |
| 6293 | |
| 6294 | // Fold constant double representable as intptr to intptr. |
| 6295 | int64_t ival; |
| 6296 | if (!mozilla::NumberEqualsInt64(input->toConstant()->toDouble(), &ival)) { |
| 6297 | // If not representable as an int64, this access is equal to an OOB access. |
| 6298 | // So replace it with a known int64/intptr value which also produces an OOB |
| 6299 | // access. If we don't support OOB accesses we have to bail out. |
| 6300 | if (!supportOOB()) { |
| 6301 | return this; |
| 6302 | } |
| 6303 | ival = -1; |
| 6304 | } |
| 6305 | |
| 6306 | if (ival < INTPTR_MIN(-9223372036854775807L-1) || ival > INTPTR_MAX(9223372036854775807L)) { |
| 6307 | return this; |
| 6308 | } |
| 6309 | |
| 6310 | return MConstant::NewIntPtr(alloc, intptr_t(ival)); |
| 6311 | } |
| 6312 | |
| 6313 | MDefinition* MIsObject::foldsTo(TempAllocator& alloc) { |
| 6314 | if (!object()->isBox()) { |
| 6315 | return this; |
| 6316 | } |
| 6317 | |
| 6318 | MDefinition* unboxed = object()->getOperand(0); |
| 6319 | if (unboxed->type() == MIRType::Object) { |
| 6320 | return MConstant::New(alloc, BooleanValue(true)); |
| 6321 | } |
| 6322 | |
| 6323 | return this; |
| 6324 | } |
| 6325 | |
| 6326 | MDefinition* MIsNullOrUndefined::foldsTo(TempAllocator& alloc) { |
| 6327 | MDefinition* input = value(); |
| 6328 | if (input->isBox()) { |
| 6329 | input = input->toBox()->input(); |
| 6330 | } |
| 6331 | |
| 6332 | if (input->definitelyType({MIRType::Null, MIRType::Undefined})) { |
| 6333 | return MConstant::New(alloc, BooleanValue(true)); |
| 6334 | } |
| 6335 | |
| 6336 | if (!input->mightBeType(MIRType::Null) && |
| 6337 | !input->mightBeType(MIRType::Undefined)) { |
| 6338 | return MConstant::New(alloc, BooleanValue(false)); |
| 6339 | } |
| 6340 | |
| 6341 | return this; |
| 6342 | } |
| 6343 | |
| 6344 | AliasSet MHomeObjectSuperBase::getAliasSet() const { |
| 6345 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6346 | } |
| 6347 | |
| 6348 | MDefinition* MGuardValue::foldsTo(TempAllocator& alloc) { |
| 6349 | if (MConstant* cst = value()->maybeConstantValue()) { |
| 6350 | if (cst->toJSValue() == expected()) { |
| 6351 | return value(); |
| 6352 | } |
| 6353 | } |
| 6354 | |
| 6355 | return this; |
| 6356 | } |
| 6357 | |
| 6358 | MDefinition* MGuardNullOrUndefined::foldsTo(TempAllocator& alloc) { |
| 6359 | MDefinition* input = value(); |
| 6360 | if (input->isBox()) { |
| 6361 | input = input->toBox()->input(); |
| 6362 | } |
| 6363 | |
| 6364 | if (input->definitelyType({MIRType::Null, MIRType::Undefined})) { |
| 6365 | return value(); |
| 6366 | } |
| 6367 | |
| 6368 | return this; |
| 6369 | } |
| 6370 | |
| 6371 | MDefinition* MGuardIsNotObject::foldsTo(TempAllocator& alloc) { |
| 6372 | MDefinition* input = value(); |
| 6373 | if (input->isBox()) { |
| 6374 | input = input->toBox()->input(); |
| 6375 | } |
| 6376 | |
| 6377 | if (!input->mightBeType(MIRType::Object)) { |
| 6378 | return value(); |
| 6379 | } |
| 6380 | |
| 6381 | return this; |
| 6382 | } |
| 6383 | |
| 6384 | MDefinition* MGuardObjectIdentity::foldsTo(TempAllocator& alloc) { |
| 6385 | if (object()->isConstant() && expected()->isConstant()) { |
| 6386 | JSObject* obj = &object()->toConstant()->toObject(); |
| 6387 | JSObject* other = &expected()->toConstant()->toObject(); |
| 6388 | if (!bailOnEquality()) { |
| 6389 | if (obj == other) { |
| 6390 | return object(); |
| 6391 | } |
| 6392 | } else { |
| 6393 | if (obj != other) { |
| 6394 | return object(); |
| 6395 | } |
| 6396 | } |
| 6397 | } |
| 6398 | |
| 6399 | if (!bailOnEquality() && object()->isNurseryObject() && |
| 6400 | expected()->isNurseryObject()) { |
| 6401 | uint32_t objIndex = object()->toNurseryObject()->nurseryIndex(); |
| 6402 | uint32_t otherIndex = expected()->toNurseryObject()->nurseryIndex(); |
| 6403 | if (objIndex == otherIndex) { |
| 6404 | return object(); |
| 6405 | } |
| 6406 | } |
| 6407 | |
| 6408 | return this; |
| 6409 | } |
| 6410 | |
| 6411 | MDefinition* MGuardSpecificFunction::foldsTo(TempAllocator& alloc) { |
| 6412 | if (function()->isConstant() && expected()->isConstant()) { |
| 6413 | JSObject* fun = &function()->toConstant()->toObject(); |
| 6414 | JSObject* other = &expected()->toConstant()->toObject(); |
| 6415 | if (fun == other) { |
| 6416 | return function(); |
| 6417 | } |
| 6418 | } |
| 6419 | |
| 6420 | if (function()->isNurseryObject() && expected()->isNurseryObject()) { |
| 6421 | uint32_t funIndex = function()->toNurseryObject()->nurseryIndex(); |
| 6422 | uint32_t otherIndex = expected()->toNurseryObject()->nurseryIndex(); |
| 6423 | if (funIndex == otherIndex) { |
| 6424 | return function(); |
| 6425 | } |
| 6426 | } |
| 6427 | |
| 6428 | return this; |
| 6429 | } |
| 6430 | |
| 6431 | MDefinition* MGuardSpecificAtom::foldsTo(TempAllocator& alloc) { |
| 6432 | if (str()->isConstant()) { |
| 6433 | JSString* s = str()->toConstant()->toString(); |
| 6434 | if (s->isAtom()) { |
| 6435 | JSAtom* cstAtom = &s->asAtom(); |
| 6436 | if (cstAtom == atom()) { |
| 6437 | return str(); |
| 6438 | } |
| 6439 | } |
| 6440 | } |
| 6441 | |
| 6442 | return this; |
| 6443 | } |
| 6444 | |
| 6445 | MDefinition* MGuardSpecificSymbol::foldsTo(TempAllocator& alloc) { |
| 6446 | if (symbol()->isConstant()) { |
| 6447 | if (symbol()->toConstant()->toSymbol() == expected()) { |
| 6448 | return symbol(); |
| 6449 | } |
| 6450 | } |
| 6451 | |
| 6452 | return this; |
| 6453 | } |
| 6454 | |
| 6455 | MDefinition* MGuardSpecificInt32::foldsTo(TempAllocator& alloc) { |
| 6456 | if (num()->isConstant() && num()->toConstant()->isInt32(expected())) { |
| 6457 | return num(); |
| 6458 | } |
| 6459 | return this; |
| 6460 | } |
| 6461 | |
| 6462 | bool MCallBindVar::congruentTo(const MDefinition* ins) const { |
| 6463 | if (!ins->isCallBindVar()) { |
| 6464 | return false; |
| 6465 | } |
| 6466 | return congruentIfOperandsEqual(ins); |
| 6467 | } |
| 6468 | |
| 6469 | bool MGuardShape::congruentTo(const MDefinition* ins) const { |
| 6470 | if (!ins->isGuardShape()) { |
| 6471 | return false; |
| 6472 | } |
| 6473 | if (shape() != ins->toGuardShape()->shape()) { |
| 6474 | return false; |
| 6475 | } |
| 6476 | return congruentIfOperandsEqual(ins); |
| 6477 | } |
| 6478 | |
| 6479 | AliasSet MGuardShape::getAliasSet() const { |
| 6480 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6481 | } |
| 6482 | |
| 6483 | MDefinition::AliasType MGuardShape::mightAlias(const MDefinition* store) const { |
| 6484 | // These instructions only modify object elements, but not the shape. |
| 6485 | if (store->isStoreElementHole() || store->isArrayPush()) { |
| 6486 | return AliasType::NoAlias; |
| 6487 | } |
| 6488 | if (object()->isConstantProto()) { |
| 6489 | const MDefinition* receiverObject = |
| 6490 | object()->toConstantProto()->getReceiverObject(); |
| 6491 | switch (store->op()) { |
| 6492 | case MDefinition::Opcode::StoreFixedSlot: |
| 6493 | if (store->toStoreFixedSlot()->object()->skipObjectGuards() == |
| 6494 | receiverObject) { |
| 6495 | return AliasType::NoAlias; |
| 6496 | } |
| 6497 | break; |
| 6498 | case MDefinition::Opcode::StoreDynamicSlot: |
| 6499 | if (store->toStoreDynamicSlot() |
| 6500 | ->slots() |
| 6501 | ->toSlots() |
| 6502 | ->object() |
| 6503 | ->skipObjectGuards() == receiverObject) { |
| 6504 | return AliasType::NoAlias; |
| 6505 | } |
| 6506 | break; |
| 6507 | case MDefinition::Opcode::AddAndStoreSlot: |
| 6508 | if (store->toAddAndStoreSlot()->object()->skipObjectGuards() == |
| 6509 | receiverObject) { |
| 6510 | return AliasType::NoAlias; |
| 6511 | } |
| 6512 | break; |
| 6513 | case MDefinition::Opcode::AllocateAndStoreSlot: |
| 6514 | if (store->toAllocateAndStoreSlot()->object()->skipObjectGuards() == |
| 6515 | receiverObject) { |
| 6516 | return AliasType::NoAlias; |
| 6517 | } |
| 6518 | break; |
| 6519 | default: |
| 6520 | break; |
| 6521 | } |
| 6522 | } |
| 6523 | return MInstruction::mightAlias(store); |
| 6524 | } |
| 6525 | |
| 6526 | bool MGuardFuse::congruentTo(const MDefinition* ins) const { |
| 6527 | if (!ins->isGuardFuse()) { |
| 6528 | return false; |
| 6529 | } |
| 6530 | if (fuseIndex() != ins->toGuardFuse()->fuseIndex()) { |
| 6531 | return false; |
| 6532 | } |
| 6533 | return congruentIfOperandsEqual(ins); |
| 6534 | } |
| 6535 | |
| 6536 | AliasSet MGuardFuse::getAliasSet() const { |
| 6537 | // The alias set below reflects the set of operations which could cause a fuse |
| 6538 | // to be popped, and therefore MGuardFuse aliases with. |
| 6539 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::DynamicSlot | |
| 6540 | AliasSet::FixedSlot | |
| 6541 | AliasSet::GlobalGenerationCounter); |
| 6542 | } |
| 6543 | |
| 6544 | AliasSet MGuardMultipleShapes::getAliasSet() const { |
| 6545 | // Note: This instruction loads the elements of the ListObject used to |
| 6546 | // store the list of shapes, but that object is internal and not exposed |
| 6547 | // to script, so it doesn't have to be in the alias set. |
| 6548 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6549 | } |
| 6550 | |
| 6551 | AliasSet MGuardGlobalGeneration::getAliasSet() const { |
| 6552 | return AliasSet::Load(AliasSet::GlobalGenerationCounter); |
| 6553 | } |
| 6554 | |
| 6555 | bool MGuardGlobalGeneration::congruentTo(const MDefinition* ins) const { |
| 6556 | return ins->isGuardGlobalGeneration() && |
| 6557 | ins->toGuardGlobalGeneration()->expected() == expected() && |
| 6558 | ins->toGuardGlobalGeneration()->generationAddr() == generationAddr(); |
| 6559 | } |
| 6560 | |
| 6561 | MDefinition* MGuardIsNotProxy::foldsTo(TempAllocator& alloc) { |
| 6562 | KnownClass known = GetObjectKnownClass(object()); |
| 6563 | if (known == KnownClass::None) { |
| 6564 | return this; |
| 6565 | } |
| 6566 | |
| 6567 | MOZ_ASSERT(!GetObjectKnownJSClass(object())->isProxyObject())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!GetObjectKnownJSClass(object())->isProxyObject() )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!GetObjectKnownJSClass(object())->isProxyObject() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!GetObjectKnownJSClass(object())->isProxyObject()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 6567); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!GetObjectKnownJSClass(object())->isProxyObject()" ")"); do { *((volatile int*)__null) = 6567; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6568 | AssertKnownClass(alloc, this, object()); |
| 6569 | return object(); |
| 6570 | } |
| 6571 | |
| 6572 | AliasSet MMegamorphicLoadSlotByValue::getAliasSet() const { |
| 6573 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6574 | AliasSet::DynamicSlot); |
| 6575 | } |
| 6576 | |
| 6577 | MDefinition* MMegamorphicLoadSlotByValue::foldsTo(TempAllocator& alloc) { |
| 6578 | MDefinition* input = idVal(); |
| 6579 | if (input->isBox()) { |
| 6580 | input = input->toBox()->input(); |
| 6581 | } |
| 6582 | |
| 6583 | MDefinition* result = this; |
| 6584 | |
| 6585 | if (input->isConstant()) { |
| 6586 | MConstant* constant = input->toConstant(); |
| 6587 | if (constant->type() == MIRType::Symbol) { |
| 6588 | PropertyKey id = PropertyKey::Symbol(constant->toSymbol()); |
| 6589 | result = MMegamorphicLoadSlot::New(alloc, object(), id); |
| 6590 | } |
| 6591 | |
| 6592 | if (constant->type() == MIRType::String) { |
| 6593 | JSString* str = constant->toString(); |
| 6594 | if (str->isAtom() && !str->asAtom().isIndex()) { |
| 6595 | PropertyKey id = PropertyKey::NonIntAtom(str); |
| 6596 | result = MMegamorphicLoadSlot::New(alloc, object(), id); |
| 6597 | } |
| 6598 | } |
| 6599 | } |
| 6600 | |
| 6601 | if (result != this) { |
| 6602 | result->setDependency(dependency()); |
| 6603 | } |
| 6604 | |
| 6605 | return result; |
| 6606 | } |
| 6607 | |
| 6608 | MDefinition* MMegamorphicLoadSlotByValuePermissive::foldsTo( |
| 6609 | TempAllocator& alloc) { |
| 6610 | MDefinition* input = idVal(); |
| 6611 | if (input->isBox()) { |
| 6612 | input = input->toBox()->input(); |
| 6613 | } |
| 6614 | |
| 6615 | MDefinition* result = this; |
| 6616 | |
| 6617 | if (input->isConstant()) { |
| 6618 | MConstant* constant = input->toConstant(); |
| 6619 | if (constant->type() == MIRType::Symbol) { |
| 6620 | PropertyKey id = PropertyKey::Symbol(constant->toSymbol()); |
| 6621 | result = MMegamorphicLoadSlotPermissive::New(alloc, object(), id); |
| 6622 | } |
| 6623 | |
| 6624 | if (constant->type() == MIRType::String) { |
| 6625 | JSString* str = constant->toString(); |
| 6626 | if (str->isAtom() && !str->asAtom().isIndex()) { |
| 6627 | PropertyKey id = PropertyKey::NonIntAtom(str); |
| 6628 | result = MMegamorphicLoadSlotPermissive::New(alloc, object(), id); |
| 6629 | } |
| 6630 | } |
| 6631 | } |
| 6632 | |
| 6633 | if (result != this) { |
| 6634 | result->toMegamorphicLoadSlotPermissive()->stealResumePoint(this); |
| 6635 | } |
| 6636 | |
| 6637 | return result; |
| 6638 | } |
| 6639 | |
| 6640 | bool MMegamorphicLoadSlot::congruentTo(const MDefinition* ins) const { |
| 6641 | if (!ins->isMegamorphicLoadSlot()) { |
| 6642 | return false; |
| 6643 | } |
| 6644 | if (ins->toMegamorphicLoadSlot()->name() != name()) { |
| 6645 | return false; |
| 6646 | } |
| 6647 | return congruentIfOperandsEqual(ins); |
| 6648 | } |
| 6649 | |
| 6650 | AliasSet MMegamorphicLoadSlot::getAliasSet() const { |
| 6651 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6652 | AliasSet::DynamicSlot); |
| 6653 | } |
| 6654 | |
| 6655 | bool MSmallObjectVariableKeyHasProp::congruentTo(const MDefinition* ins) const { |
| 6656 | if (!ins->isSmallObjectVariableKeyHasProp()) { |
| 6657 | return false; |
| 6658 | } |
| 6659 | if (ins->toSmallObjectVariableKeyHasProp()->shape() != shape()) { |
| 6660 | return false; |
| 6661 | } |
| 6662 | return congruentIfOperandsEqual(ins); |
| 6663 | } |
| 6664 | |
| 6665 | AliasSet MSmallObjectVariableKeyHasProp::getAliasSet() const { |
| 6666 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6667 | AliasSet::DynamicSlot); |
| 6668 | } |
| 6669 | |
| 6670 | bool MMegamorphicHasProp::congruentTo(const MDefinition* ins) const { |
| 6671 | if (!ins->isMegamorphicHasProp()) { |
| 6672 | return false; |
| 6673 | } |
| 6674 | if (ins->toMegamorphicHasProp()->hasOwn() != hasOwn()) { |
| 6675 | return false; |
| 6676 | } |
| 6677 | return congruentIfOperandsEqual(ins); |
| 6678 | } |
| 6679 | |
| 6680 | AliasSet MMegamorphicHasProp::getAliasSet() const { |
| 6681 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6682 | AliasSet::DynamicSlot); |
| 6683 | } |
| 6684 | |
| 6685 | bool MNurseryObject::congruentTo(const MDefinition* ins) const { |
| 6686 | if (!ins->isNurseryObject()) { |
| 6687 | return false; |
| 6688 | } |
| 6689 | return nurseryIndex() == ins->toNurseryObject()->nurseryIndex(); |
| 6690 | } |
| 6691 | |
| 6692 | AliasSet MGuardFunctionIsNonBuiltinCtor::getAliasSet() const { |
| 6693 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6694 | } |
| 6695 | |
| 6696 | bool MGuardFunctionKind::congruentTo(const MDefinition* ins) const { |
| 6697 | if (!ins->isGuardFunctionKind()) { |
| 6698 | return false; |
| 6699 | } |
| 6700 | if (expected() != ins->toGuardFunctionKind()->expected()) { |
| 6701 | return false; |
| 6702 | } |
| 6703 | if (bailOnEquality() != ins->toGuardFunctionKind()->bailOnEquality()) { |
| 6704 | return false; |
| 6705 | } |
| 6706 | return congruentIfOperandsEqual(ins); |
| 6707 | } |
| 6708 | |
| 6709 | AliasSet MGuardFunctionKind::getAliasSet() const { |
| 6710 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6711 | } |
| 6712 | |
| 6713 | bool MGuardFunctionScript::congruentTo(const MDefinition* ins) const { |
| 6714 | if (!ins->isGuardFunctionScript()) { |
| 6715 | return false; |
| 6716 | } |
| 6717 | if (expected() != ins->toGuardFunctionScript()->expected()) { |
| 6718 | return false; |
| 6719 | } |
| 6720 | return congruentIfOperandsEqual(ins); |
| 6721 | } |
| 6722 | |
| 6723 | AliasSet MGuardFunctionScript::getAliasSet() const { |
| 6724 | // A JSFunction's BaseScript pointer is immutable. Relazification of |
| 6725 | // top-level/named self-hosted functions is an exception to this, but we don't |
| 6726 | // use this guard for those self-hosted functions. |
| 6727 | // See IRGenerator::emitCalleeGuard. |
| 6728 | MOZ_ASSERT_IF(flags_.isSelfHostedOrIntrinsic(), flags_.isLambda())do { if (flags_.isSelfHostedOrIntrinsic()) { do { static_assert ( mozilla::detail::AssertionConditionType<decltype(flags_. isLambda())>::isValid, "invalid assertion condition"); if ( (__builtin_expect(!!(!(!!(flags_.isLambda()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("flags_.isLambda()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 6728); AnnotateMozCrashReason("MOZ_ASSERT" "(" "flags_.isLambda()" ")"); do { *((volatile int*)__null) = 6728; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 6729 | return AliasSet::None(); |
| 6730 | } |
| 6731 | |
| 6732 | bool MGuardSpecificAtom::congruentTo(const MDefinition* ins) const { |
| 6733 | if (!ins->isGuardSpecificAtom()) { |
| 6734 | return false; |
| 6735 | } |
| 6736 | if (atom() != ins->toGuardSpecificAtom()->atom()) { |
| 6737 | return false; |
| 6738 | } |
| 6739 | return congruentIfOperandsEqual(ins); |
| 6740 | } |
| 6741 | |
| 6742 | MDefinition* MGuardStringToIndex::foldsTo(TempAllocator& alloc) { |
| 6743 | if (!string()->isConstant()) { |
| 6744 | return this; |
| 6745 | } |
| 6746 | |
| 6747 | JSString* str = string()->toConstant()->toString(); |
| 6748 | |
| 6749 | int32_t index = GetIndexFromString(str); |
| 6750 | if (index < 0) { |
| 6751 | return this; |
| 6752 | } |
| 6753 | |
| 6754 | return MConstant::New(alloc, Int32Value(index)); |
| 6755 | } |
| 6756 | |
| 6757 | MDefinition* MGuardStringToInt32::foldsTo(TempAllocator& alloc) { |
| 6758 | if (!string()->isConstant()) { |
| 6759 | return this; |
| 6760 | } |
| 6761 | |
| 6762 | JSLinearString* str = &string()->toConstant()->toString()->asLinear(); |
| 6763 | double number = LinearStringToNumber(str); |
| 6764 | |
| 6765 | int32_t n; |
| 6766 | if (!mozilla::NumberIsInt32(number, &n)) { |
| 6767 | return this; |
| 6768 | } |
| 6769 | |
| 6770 | return MConstant::New(alloc, Int32Value(n)); |
| 6771 | } |
| 6772 | |
| 6773 | MDefinition* MGuardStringToDouble::foldsTo(TempAllocator& alloc) { |
| 6774 | if (!string()->isConstant()) { |
| 6775 | return this; |
| 6776 | } |
| 6777 | |
| 6778 | JSLinearString* str = &string()->toConstant()->toString()->asLinear(); |
| 6779 | double number = LinearStringToNumber(str); |
| 6780 | return MConstant::New(alloc, DoubleValue(number)); |
| 6781 | } |
| 6782 | |
| 6783 | AliasSet MGuardNoDenseElements::getAliasSet() const { |
| 6784 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6785 | } |
| 6786 | |
| 6787 | AliasSet MIteratorHasIndices::getAliasSet() const { |
| 6788 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6789 | } |
| 6790 | |
| 6791 | AliasSet MAllocateAndStoreSlot::getAliasSet() const { |
| 6792 | return AliasSet::Store(AliasSet::ObjectFields | AliasSet::DynamicSlot); |
| 6793 | } |
| 6794 | |
| 6795 | AliasSet MLoadDOMExpandoValue::getAliasSet() const { |
| 6796 | return AliasSet::Load(AliasSet::DOMProxyExpando); |
| 6797 | } |
| 6798 | |
| 6799 | AliasSet MLoadDOMExpandoValueIgnoreGeneration::getAliasSet() const { |
| 6800 | return AliasSet::Load(AliasSet::DOMProxyExpando); |
| 6801 | } |
| 6802 | |
| 6803 | bool MGuardDOMExpandoMissingOrGuardShape::congruentTo( |
| 6804 | const MDefinition* ins) const { |
| 6805 | if (!ins->isGuardDOMExpandoMissingOrGuardShape()) { |
| 6806 | return false; |
| 6807 | } |
| 6808 | if (shape() != ins->toGuardDOMExpandoMissingOrGuardShape()->shape()) { |
| 6809 | return false; |
| 6810 | } |
| 6811 | return congruentIfOperandsEqual(ins); |
| 6812 | } |
| 6813 | |
| 6814 | AliasSet MGuardDOMExpandoMissingOrGuardShape::getAliasSet() const { |
| 6815 | return AliasSet::Load(AliasSet::ObjectFields); |
| 6816 | } |
| 6817 | |
| 6818 | MDefinition* MGuardToClass::foldsTo(TempAllocator& alloc) { |
| 6819 | const JSClass* clasp = GetObjectKnownJSClass(object()); |
| 6820 | if (!clasp || getClass() != clasp) { |
| 6821 | return this; |
| 6822 | } |
| 6823 | |
| 6824 | AssertKnownClass(alloc, this, object()); |
| 6825 | return object(); |
| 6826 | } |
| 6827 | |
| 6828 | MDefinition* MGuardToEitherClass::foldsTo(TempAllocator& alloc) { |
| 6829 | const JSClass* clasp = GetObjectKnownJSClass(object()); |
| 6830 | if (!clasp || (getClass1() != clasp && getClass2() != clasp)) { |
| 6831 | return this; |
| 6832 | } |
| 6833 | |
| 6834 | AssertKnownClass(alloc, this, object()); |
| 6835 | return object(); |
| 6836 | } |
| 6837 | |
| 6838 | MDefinition* MGuardToFunction::foldsTo(TempAllocator& alloc) { |
| 6839 | if (GetObjectKnownClass(object()) != KnownClass::Function) { |
| 6840 | return this; |
| 6841 | } |
| 6842 | |
| 6843 | AssertKnownClass(alloc, this, object()); |
| 6844 | return object(); |
| 6845 | } |
| 6846 | |
| 6847 | MDefinition* MHasClass::foldsTo(TempAllocator& alloc) { |
| 6848 | const JSClass* clasp = GetObjectKnownJSClass(object()); |
| 6849 | if (!clasp) { |
| 6850 | return this; |
| 6851 | } |
| 6852 | |
| 6853 | AssertKnownClass(alloc, this, object()); |
| 6854 | return MConstant::New(alloc, BooleanValue(getClass() == clasp)); |
| 6855 | } |
| 6856 | |
| 6857 | MDefinition* MIsCallable::foldsTo(TempAllocator& alloc) { |
| 6858 | if (input()->type() != MIRType::Object) { |
| 6859 | return this; |
| 6860 | } |
| 6861 | |
| 6862 | KnownClass known = GetObjectKnownClass(input()); |
| 6863 | if (known == KnownClass::None) { |
| 6864 | return this; |
| 6865 | } |
| 6866 | |
| 6867 | AssertKnownClass(alloc, this, input()); |
| 6868 | return MConstant::New(alloc, BooleanValue(known == KnownClass::Function)); |
| 6869 | } |
| 6870 | |
| 6871 | MDefinition* MIsArray::foldsTo(TempAllocator& alloc) { |
| 6872 | if (input()->type() != MIRType::Object) { |
| 6873 | return this; |
| 6874 | } |
| 6875 | |
| 6876 | KnownClass known = GetObjectKnownClass(input()); |
| 6877 | if (known == KnownClass::None) { |
| 6878 | return this; |
| 6879 | } |
| 6880 | |
| 6881 | AssertKnownClass(alloc, this, input()); |
| 6882 | return MConstant::New(alloc, BooleanValue(known == KnownClass::Array)); |
| 6883 | } |
| 6884 | |
| 6885 | AliasSet MObjectClassToString::getAliasSet() const { |
| 6886 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 6887 | AliasSet::DynamicSlot); |
| 6888 | } |
| 6889 | |
| 6890 | MDefinition* MGuardIsNotArrayBufferMaybeShared::foldsTo(TempAllocator& alloc) { |
| 6891 | switch (GetObjectKnownClass(object())) { |
| 6892 | case KnownClass::PlainObject: |
| 6893 | case KnownClass::Array: |
| 6894 | case KnownClass::Function: |
| 6895 | case KnownClass::RegExp: |
| 6896 | case KnownClass::ArrayIterator: |
| 6897 | case KnownClass::StringIterator: |
| 6898 | case KnownClass::RegExpStringIterator: { |
| 6899 | AssertKnownClass(alloc, this, object()); |
| 6900 | return object(); |
| 6901 | } |
| 6902 | case KnownClass::None: |
| 6903 | break; |
| 6904 | } |
| 6905 | |
| 6906 | return this; |
| 6907 | } |
| 6908 | |
| 6909 | MDefinition* MCheckIsObj::foldsTo(TempAllocator& alloc) { |
| 6910 | if (!input()->isBox()) { |
| 6911 | return this; |
| 6912 | } |
| 6913 | |
| 6914 | MDefinition* unboxed = input()->getOperand(0); |
| 6915 | if (unboxed->type() == MIRType::Object) { |
| 6916 | return unboxed; |
| 6917 | } |
| 6918 | |
| 6919 | return this; |
| 6920 | } |
| 6921 | |
| 6922 | AliasSet MCheckIsObj::getAliasSet() const { |
| 6923 | return AliasSet::Store(AliasSet::ExceptionState); |
| 6924 | } |
| 6925 | |
| 6926 | #ifdef JS_PUNBOX641 |
| 6927 | AliasSet MCheckScriptedProxyGetResult::getAliasSet() const { |
| 6928 | return AliasSet::Store(AliasSet::ExceptionState); |
| 6929 | } |
| 6930 | #endif |
| 6931 | |
| 6932 | static bool IsBoxedObject(MDefinition* def) { |
| 6933 | MOZ_ASSERT(def->type() == MIRType::Value)do { static_assert( mozilla::detail::AssertionConditionType< decltype(def->type() == MIRType::Value)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(def->type() == MIRType::Value ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "def->type() == MIRType::Value", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 6933); AnnotateMozCrashReason("MOZ_ASSERT" "(" "def->type() == MIRType::Value" ")"); do { *((volatile int*)__null) = 6933; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6934 | |
| 6935 | if (def->isBox()) { |
| 6936 | return def->toBox()->input()->type() == MIRType::Object; |
| 6937 | } |
| 6938 | |
| 6939 | // Construct calls are always returning a boxed object. |
| 6940 | // |
| 6941 | // TODO: We should consider encoding this directly in the graph instead of |
| 6942 | // having to special case it here. |
| 6943 | if (def->isCall()) { |
| 6944 | return def->toCall()->isConstructing(); |
| 6945 | } |
| 6946 | if (def->isConstructArray()) { |
| 6947 | return true; |
| 6948 | } |
| 6949 | if (def->isConstructArgs()) { |
| 6950 | return true; |
| 6951 | } |
| 6952 | |
| 6953 | return false; |
| 6954 | } |
| 6955 | |
| 6956 | MDefinition* MCheckReturn::foldsTo(TempAllocator& alloc) { |
| 6957 | auto* returnVal = returnValue(); |
| 6958 | if (!returnVal->isBox()) { |
| 6959 | return this; |
| 6960 | } |
| 6961 | |
| 6962 | auto* unboxedReturnVal = returnVal->toBox()->input(); |
| 6963 | if (unboxedReturnVal->type() == MIRType::Object) { |
| 6964 | return returnVal; |
| 6965 | } |
| 6966 | |
| 6967 | if (unboxedReturnVal->type() != MIRType::Undefined) { |
| 6968 | return this; |
| 6969 | } |
| 6970 | |
| 6971 | auto* thisVal = thisValue(); |
| 6972 | if (IsBoxedObject(thisVal)) { |
| 6973 | return thisVal; |
| 6974 | } |
| 6975 | |
| 6976 | return this; |
| 6977 | } |
| 6978 | |
| 6979 | MDefinition* MCheckThis::foldsTo(TempAllocator& alloc) { |
| 6980 | MDefinition* input = thisValue(); |
| 6981 | if (!input->isBox()) { |
| 6982 | return this; |
| 6983 | } |
| 6984 | |
| 6985 | MDefinition* unboxed = input->getOperand(0); |
| 6986 | if (unboxed->mightBeMagicType()) { |
| 6987 | return this; |
| 6988 | } |
| 6989 | |
| 6990 | return input; |
| 6991 | } |
| 6992 | |
| 6993 | MDefinition* MCheckThisReinit::foldsTo(TempAllocator& alloc) { |
| 6994 | MDefinition* input = thisValue(); |
| 6995 | if (!input->isBox()) { |
| 6996 | return this; |
| 6997 | } |
| 6998 | |
| 6999 | MDefinition* unboxed = input->getOperand(0); |
| 7000 | if (unboxed->type() != MIRType::MagicUninitializedLexical) { |
| 7001 | return this; |
| 7002 | } |
| 7003 | |
| 7004 | return input; |
| 7005 | } |
| 7006 | |
| 7007 | MDefinition* MCheckObjCoercible::foldsTo(TempAllocator& alloc) { |
| 7008 | MDefinition* input = checkValue(); |
| 7009 | if (!input->isBox()) { |
| 7010 | return this; |
| 7011 | } |
| 7012 | |
| 7013 | MDefinition* unboxed = input->getOperand(0); |
| 7014 | if (unboxed->mightBeType(MIRType::Null) || |
| 7015 | unboxed->mightBeType(MIRType::Undefined)) { |
| 7016 | return this; |
| 7017 | } |
| 7018 | |
| 7019 | return input; |
| 7020 | } |
| 7021 | |
| 7022 | AliasSet MCheckObjCoercible::getAliasSet() const { |
| 7023 | return AliasSet::Store(AliasSet::ExceptionState); |
| 7024 | } |
| 7025 | |
| 7026 | AliasSet MCheckReturn::getAliasSet() const { |
| 7027 | return AliasSet::Store(AliasSet::ExceptionState); |
| 7028 | } |
| 7029 | |
| 7030 | AliasSet MCheckThis::getAliasSet() const { |
| 7031 | return AliasSet::Store(AliasSet::ExceptionState); |
| 7032 | } |
| 7033 | |
| 7034 | AliasSet MCheckThisReinit::getAliasSet() const { |
| 7035 | return AliasSet::Store(AliasSet::ExceptionState); |
| 7036 | } |
| 7037 | |
| 7038 | AliasSet MIsPackedArray::getAliasSet() const { |
| 7039 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7040 | } |
| 7041 | |
| 7042 | AliasSet MGuardArrayIsPacked::getAliasSet() const { |
| 7043 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7044 | } |
| 7045 | |
| 7046 | AliasSet MSuperFunction::getAliasSet() const { |
| 7047 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7048 | } |
| 7049 | |
| 7050 | AliasSet MInitHomeObject::getAliasSet() const { |
| 7051 | return AliasSet::Store(AliasSet::ObjectFields); |
| 7052 | } |
| 7053 | |
| 7054 | AliasSet MLoadWrapperTarget::getAliasSet() const { |
| 7055 | return AliasSet::Load(AliasSet::Any); |
| 7056 | } |
| 7057 | |
| 7058 | bool MLoadWrapperTarget::congruentTo(const MDefinition* ins) const { |
| 7059 | if (!ins->isLoadWrapperTarget()) { |
| 7060 | return false; |
| 7061 | } |
| 7062 | if (ins->toLoadWrapperTarget()->fallible() != fallible()) { |
| 7063 | return false; |
| 7064 | } |
| 7065 | return congruentIfOperandsEqual(ins); |
| 7066 | } |
| 7067 | |
| 7068 | AliasSet MGuardHasGetterSetter::getAliasSet() const { |
| 7069 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7070 | } |
| 7071 | |
| 7072 | bool MGuardHasGetterSetter::congruentTo(const MDefinition* ins) const { |
| 7073 | if (!ins->isGuardHasGetterSetter()) { |
| 7074 | return false; |
| 7075 | } |
| 7076 | if (ins->toGuardHasGetterSetter()->propId() != propId()) { |
| 7077 | return false; |
| 7078 | } |
| 7079 | if (ins->toGuardHasGetterSetter()->getterSetter() != getterSetter()) { |
| 7080 | return false; |
| 7081 | } |
| 7082 | return congruentIfOperandsEqual(ins); |
| 7083 | } |
| 7084 | |
| 7085 | AliasSet MGuardIsExtensible::getAliasSet() const { |
| 7086 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7087 | } |
| 7088 | |
| 7089 | AliasSet MGuardIndexIsNotDenseElement::getAliasSet() const { |
| 7090 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::Element); |
| 7091 | } |
| 7092 | |
| 7093 | AliasSet MGuardIndexIsValidUpdateOrAdd::getAliasSet() const { |
| 7094 | return AliasSet::Load(AliasSet::ObjectFields); |
| 7095 | } |
| 7096 | |
| 7097 | AliasSet MCallObjectHasSparseElement::getAliasSet() const { |
| 7098 | return AliasSet::Load(AliasSet::Element | AliasSet::ObjectFields | |
| 7099 | AliasSet::FixedSlot | AliasSet::DynamicSlot); |
| 7100 | } |
| 7101 | |
| 7102 | AliasSet MLoadSlotByIteratorIndex::getAliasSet() const { |
| 7103 | return AliasSet::Load(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 7104 | AliasSet::DynamicSlot | AliasSet::Element); |
| 7105 | } |
| 7106 | |
| 7107 | AliasSet MStoreSlotByIteratorIndex::getAliasSet() const { |
| 7108 | return AliasSet::Store(AliasSet::ObjectFields | AliasSet::FixedSlot | |
| 7109 | AliasSet::DynamicSlot | AliasSet::Element); |
| 7110 | } |
| 7111 | |
| 7112 | MDefinition* MGuardInt32IsNonNegative::foldsTo(TempAllocator& alloc) { |
| 7113 | MOZ_ASSERT(index()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(index()->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(index()->type() == MIRType ::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("index()->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7113); AnnotateMozCrashReason("MOZ_ASSERT" "(" "index()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 7113; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7114 | |
| 7115 | MDefinition* input = index(); |
| 7116 | if (!input->isConstant() || input->toConstant()->toInt32() < 0) { |
| 7117 | return this; |
| 7118 | } |
| 7119 | return input; |
| 7120 | } |
| 7121 | |
| 7122 | MDefinition* MGuardInt32Range::foldsTo(TempAllocator& alloc) { |
| 7123 | MOZ_ASSERT(input()->type() == MIRType::Int32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(input()->type() == MIRType::Int32)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(input()->type() == MIRType ::Int32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("input()->type() == MIRType::Int32", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7123); AnnotateMozCrashReason("MOZ_ASSERT" "(" "input()->type() == MIRType::Int32" ")"); do { *((volatile int*)__null) = 7123; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7124 | MOZ_ASSERT(minimum() <= maximum())do { static_assert( mozilla::detail::AssertionConditionType< decltype(minimum() <= maximum())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(minimum() <= maximum()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("minimum() <= maximum()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7124); AnnotateMozCrashReason("MOZ_ASSERT" "(" "minimum() <= maximum()" ")"); do { *((volatile int*)__null) = 7124; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7125 | |
| 7126 | MDefinition* in = input(); |
| 7127 | if (!in->isConstant()) { |
| 7128 | return this; |
| 7129 | } |
| 7130 | int32_t cst = in->toConstant()->toInt32(); |
| 7131 | if (cst < minimum() || cst > maximum()) { |
| 7132 | return this; |
| 7133 | } |
| 7134 | return in; |
| 7135 | } |
| 7136 | |
| 7137 | MDefinition* MGuardNonGCThing::foldsTo(TempAllocator& alloc) { |
| 7138 | if (!input()->isBox()) { |
| 7139 | return this; |
| 7140 | } |
| 7141 | |
| 7142 | MDefinition* unboxed = input()->getOperand(0); |
| 7143 | if (!IsNonGCThing(unboxed->type())) { |
| 7144 | return this; |
| 7145 | } |
| 7146 | return input(); |
| 7147 | } |
| 7148 | |
| 7149 | AliasSet MSetObjectHasNonBigInt::getAliasSet() const { |
| 7150 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7151 | } |
| 7152 | |
| 7153 | AliasSet MSetObjectHasBigInt::getAliasSet() const { |
| 7154 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7155 | } |
| 7156 | |
| 7157 | AliasSet MSetObjectHasValue::getAliasSet() const { |
| 7158 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7159 | } |
| 7160 | |
| 7161 | AliasSet MSetObjectHasValueVMCall::getAliasSet() const { |
| 7162 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7163 | } |
| 7164 | |
| 7165 | AliasSet MSetObjectSize::getAliasSet() const { |
| 7166 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7167 | } |
| 7168 | |
| 7169 | AliasSet MMapObjectHasNonBigInt::getAliasSet() const { |
| 7170 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7171 | } |
| 7172 | |
| 7173 | AliasSet MMapObjectHasBigInt::getAliasSet() const { |
| 7174 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7175 | } |
| 7176 | |
| 7177 | AliasSet MMapObjectHasValue::getAliasSet() const { |
| 7178 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7179 | } |
| 7180 | |
| 7181 | AliasSet MMapObjectHasValueVMCall::getAliasSet() const { |
| 7182 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7183 | } |
| 7184 | |
| 7185 | AliasSet MMapObjectGetNonBigInt::getAliasSet() const { |
| 7186 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7187 | } |
| 7188 | |
| 7189 | AliasSet MMapObjectGetBigInt::getAliasSet() const { |
| 7190 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7191 | } |
| 7192 | |
| 7193 | AliasSet MMapObjectGetValue::getAliasSet() const { |
| 7194 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7195 | } |
| 7196 | |
| 7197 | AliasSet MMapObjectGetValueVMCall::getAliasSet() const { |
| 7198 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7199 | } |
| 7200 | |
| 7201 | AliasSet MMapObjectSize::getAliasSet() const { |
| 7202 | return AliasSet::Load(AliasSet::MapOrSetHashTable); |
| 7203 | } |
| 7204 | |
| 7205 | MBindFunction* MBindFunction::New(TempAllocator& alloc, MDefinition* target, |
| 7206 | uint32_t argc, JSObject* templateObj) { |
| 7207 | auto* ins = new (alloc) MBindFunction(templateObj); |
| 7208 | if (!ins->init(alloc, NumNonArgumentOperands + argc)) { |
| 7209 | return nullptr; |
| 7210 | } |
| 7211 | ins->initOperand(0, target); |
| 7212 | return ins; |
| 7213 | } |
| 7214 | |
| 7215 | MCreateInlinedArgumentsObject* MCreateInlinedArgumentsObject::New( |
| 7216 | TempAllocator& alloc, MDefinition* callObj, MDefinition* callee, |
| 7217 | MDefinitionVector& args, ArgumentsObject* templateObj) { |
| 7218 | MCreateInlinedArgumentsObject* ins = |
| 7219 | new (alloc) MCreateInlinedArgumentsObject(templateObj); |
| 7220 | |
| 7221 | uint32_t argc = args.length(); |
| 7222 | MOZ_ASSERT(argc <= ArgumentsObject::MaxInlinedArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(argc <= ArgumentsObject::MaxInlinedArgs)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(argc <= ArgumentsObject::MaxInlinedArgs))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("argc <= ArgumentsObject::MaxInlinedArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7222); AnnotateMozCrashReason("MOZ_ASSERT" "(" "argc <= ArgumentsObject::MaxInlinedArgs" ")"); do { *((volatile int*)__null) = 7222; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7223 | |
| 7224 | if (!ins->init(alloc, argc + NumNonArgumentOperands)) { |
| 7225 | return nullptr; |
| 7226 | } |
| 7227 | |
| 7228 | ins->initOperand(0, callObj); |
| 7229 | ins->initOperand(1, callee); |
| 7230 | for (uint32_t i = 0; i < argc; i++) { |
| 7231 | ins->initOperand(i + NumNonArgumentOperands, args[i]); |
| 7232 | } |
| 7233 | |
| 7234 | return ins; |
| 7235 | } |
| 7236 | |
| 7237 | MGetInlinedArgument* MGetInlinedArgument::New( |
| 7238 | TempAllocator& alloc, MDefinition* index, |
| 7239 | MCreateInlinedArgumentsObject* args) { |
| 7240 | MGetInlinedArgument* ins = new (alloc) MGetInlinedArgument(); |
| 7241 | |
| 7242 | uint32_t argc = args->numActuals(); |
| 7243 | MOZ_ASSERT(argc <= ArgumentsObject::MaxInlinedArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(argc <= ArgumentsObject::MaxInlinedArgs)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(argc <= ArgumentsObject::MaxInlinedArgs))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("argc <= ArgumentsObject::MaxInlinedArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7243); AnnotateMozCrashReason("MOZ_ASSERT" "(" "argc <= ArgumentsObject::MaxInlinedArgs" ")"); do { *((volatile int*)__null) = 7243; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7244 | |
| 7245 | if (!ins->init(alloc, argc + NumNonArgumentOperands)) { |
| 7246 | return nullptr; |
| 7247 | } |
| 7248 | |
| 7249 | ins->initOperand(0, index); |
| 7250 | for (uint32_t i = 0; i < argc; i++) { |
| 7251 | ins->initOperand(i + NumNonArgumentOperands, args->getArg(i)); |
| 7252 | } |
| 7253 | |
| 7254 | return ins; |
| 7255 | } |
| 7256 | |
| 7257 | MGetInlinedArgument* MGetInlinedArgument::New(TempAllocator& alloc, |
| 7258 | MDefinition* index, |
| 7259 | const CallInfo& callInfo) { |
| 7260 | MGetInlinedArgument* ins = new (alloc) MGetInlinedArgument(); |
| 7261 | |
| 7262 | uint32_t argc = callInfo.argc(); |
| 7263 | MOZ_ASSERT(argc <= ArgumentsObject::MaxInlinedArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(argc <= ArgumentsObject::MaxInlinedArgs)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(argc <= ArgumentsObject::MaxInlinedArgs))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("argc <= ArgumentsObject::MaxInlinedArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7263); AnnotateMozCrashReason("MOZ_ASSERT" "(" "argc <= ArgumentsObject::MaxInlinedArgs" ")"); do { *((volatile int*)__null) = 7263; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7264 | |
| 7265 | if (!ins->init(alloc, argc + NumNonArgumentOperands)) { |
| 7266 | return nullptr; |
| 7267 | } |
| 7268 | |
| 7269 | ins->initOperand(0, index); |
| 7270 | for (uint32_t i = 0; i < argc; i++) { |
| 7271 | ins->initOperand(i + NumNonArgumentOperands, callInfo.getArg(i)); |
| 7272 | } |
| 7273 | |
| 7274 | return ins; |
| 7275 | } |
| 7276 | |
| 7277 | MDefinition* MGetInlinedArgument::foldsTo(TempAllocator& alloc) { |
| 7278 | MDefinition* indexDef = SkipUninterestingInstructions(index()); |
| 7279 | if (!indexDef->isConstant() || indexDef->type() != MIRType::Int32) { |
| 7280 | return this; |
| 7281 | } |
| 7282 | |
| 7283 | int32_t indexConst = indexDef->toConstant()->toInt32(); |
| 7284 | if (indexConst < 0 || uint32_t(indexConst) >= numActuals()) { |
| 7285 | return this; |
| 7286 | } |
| 7287 | |
| 7288 | MDefinition* arg = getArg(indexConst); |
| 7289 | if (arg->type() != MIRType::Value) { |
| 7290 | arg = MBox::New(alloc, arg); |
| 7291 | } |
| 7292 | |
| 7293 | return arg; |
| 7294 | } |
| 7295 | |
| 7296 | MGetInlinedArgumentHole* MGetInlinedArgumentHole::New( |
| 7297 | TempAllocator& alloc, MDefinition* index, |
| 7298 | MCreateInlinedArgumentsObject* args) { |
| 7299 | auto* ins = new (alloc) MGetInlinedArgumentHole(); |
| 7300 | |
| 7301 | uint32_t argc = args->numActuals(); |
| 7302 | MOZ_ASSERT(argc <= ArgumentsObject::MaxInlinedArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(argc <= ArgumentsObject::MaxInlinedArgs)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(argc <= ArgumentsObject::MaxInlinedArgs))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("argc <= ArgumentsObject::MaxInlinedArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7302); AnnotateMozCrashReason("MOZ_ASSERT" "(" "argc <= ArgumentsObject::MaxInlinedArgs" ")"); do { *((volatile int*)__null) = 7302; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7303 | |
| 7304 | if (!ins->init(alloc, argc + NumNonArgumentOperands)) { |
| 7305 | return nullptr; |
| 7306 | } |
| 7307 | |
| 7308 | ins->initOperand(0, index); |
| 7309 | for (uint32_t i = 0; i < argc; i++) { |
| 7310 | ins->initOperand(i + NumNonArgumentOperands, args->getArg(i)); |
| 7311 | } |
| 7312 | |
| 7313 | return ins; |
| 7314 | } |
| 7315 | |
| 7316 | MDefinition* MGetInlinedArgumentHole::foldsTo(TempAllocator& alloc) { |
| 7317 | MDefinition* indexDef = SkipUninterestingInstructions(index()); |
| 7318 | if (!indexDef->isConstant() || indexDef->type() != MIRType::Int32) { |
| 7319 | return this; |
| 7320 | } |
| 7321 | |
| 7322 | int32_t indexConst = indexDef->toConstant()->toInt32(); |
| 7323 | if (indexConst < 0) { |
| 7324 | return this; |
| 7325 | } |
| 7326 | |
| 7327 | MDefinition* arg; |
| 7328 | if (uint32_t(indexConst) < numActuals()) { |
| 7329 | arg = getArg(indexConst); |
| 7330 | |
| 7331 | if (arg->type() != MIRType::Value) { |
| 7332 | arg = MBox::New(alloc, arg); |
| 7333 | } |
| 7334 | } else { |
| 7335 | auto* undefined = MConstant::New(alloc, UndefinedValue()); |
| 7336 | block()->insertBefore(this, undefined); |
| 7337 | |
| 7338 | arg = MBox::New(alloc, undefined); |
| 7339 | } |
| 7340 | |
| 7341 | return arg; |
| 7342 | } |
| 7343 | |
| 7344 | MInlineArgumentsSlice* MInlineArgumentsSlice::New( |
| 7345 | TempAllocator& alloc, MDefinition* begin, MDefinition* count, |
| 7346 | MCreateInlinedArgumentsObject* args, JSObject* templateObj, |
| 7347 | gc::Heap initialHeap) { |
| 7348 | auto* ins = new (alloc) MInlineArgumentsSlice(templateObj, initialHeap); |
| 7349 | |
| 7350 | uint32_t argc = args->numActuals(); |
| 7351 | MOZ_ASSERT(argc <= ArgumentsObject::MaxInlinedArgs)do { static_assert( mozilla::detail::AssertionConditionType< decltype(argc <= ArgumentsObject::MaxInlinedArgs)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(argc <= ArgumentsObject::MaxInlinedArgs))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("argc <= ArgumentsObject::MaxInlinedArgs" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7351); AnnotateMozCrashReason("MOZ_ASSERT" "(" "argc <= ArgumentsObject::MaxInlinedArgs" ")"); do { *((volatile int*)__null) = 7351; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7352 | |
| 7353 | if (!ins->init(alloc, argc + NumNonArgumentOperands)) { |
| 7354 | return nullptr; |
| 7355 | } |
| 7356 | |
| 7357 | ins->initOperand(0, begin); |
| 7358 | ins->initOperand(1, count); |
| 7359 | for (uint32_t i = 0; i < argc; i++) { |
| 7360 | ins->initOperand(i + NumNonArgumentOperands, args->getArg(i)); |
| 7361 | } |
| 7362 | |
| 7363 | return ins; |
| 7364 | } |
| 7365 | |
| 7366 | MDefinition* MArrayLength::foldsTo(TempAllocator& alloc) { |
| 7367 | // Object.keys() is potentially effectful, in case of Proxies. Otherwise, when |
| 7368 | // it is only computed for its length property, there is no need to |
| 7369 | // materialize the Array which results from it and it can be marked as |
| 7370 | // recovered on bailout as long as no properties are added to / removed from |
| 7371 | // the object. |
| 7372 | MDefinition* elems = elements(); |
| 7373 | if (!elems->isElements()) { |
| 7374 | return this; |
| 7375 | } |
| 7376 | |
| 7377 | MDefinition* guardshape = elems->toElements()->object(); |
| 7378 | if (!guardshape->isGuardShape()) { |
| 7379 | return this; |
| 7380 | } |
| 7381 | |
| 7382 | // The Guard shape is guarding the shape of the object returned by |
| 7383 | // Object.keys, this guard can be removed as knowing the function is good |
| 7384 | // enough to infer that we are returning an array. |
| 7385 | MDefinition* keys = guardshape->toGuardShape()->object(); |
| 7386 | if (!keys->isObjectKeys()) { |
| 7387 | return this; |
| 7388 | } |
| 7389 | |
| 7390 | // Object.keys() inline cache guards against proxies when creating the IC. We |
| 7391 | // rely on this here as we are looking to elide `Object.keys(...)` call, which |
| 7392 | // is only possible if we know for sure that no side-effect might have |
| 7393 | // happened. |
| 7394 | MDefinition* noproxy = keys->toObjectKeys()->object(); |
| 7395 | if (!noproxy->isGuardIsNotProxy()) { |
| 7396 | // The guard might have been replaced by an assertion, in case the class is |
| 7397 | // known at compile time. IF the guard has been removed check whether check |
| 7398 | // has been removed. |
| 7399 | MOZ_RELEASE_ASSERT(GetObjectKnownClass(noproxy) != KnownClass::None)do { static_assert( mozilla::detail::AssertionConditionType< decltype(GetObjectKnownClass(noproxy) != KnownClass::None)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(GetObjectKnownClass(noproxy) != KnownClass::None))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("GetObjectKnownClass(noproxy) != KnownClass::None" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7399); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "GetObjectKnownClass(noproxy) != KnownClass::None" ")"); do { *((volatile int*)__null) = 7399; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7400 | MOZ_RELEASE_ASSERT(!GetObjectKnownJSClass(noproxy)->isProxyObject())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!GetObjectKnownJSClass(noproxy)->isProxyObject()) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!GetObjectKnownJSClass(noproxy)->isProxyObject()) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!GetObjectKnownJSClass(noproxy)->isProxyObject()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7400); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "!GetObjectKnownJSClass(noproxy)->isProxyObject()" ")"); do { *((volatile int*)__null) = 7400; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7401 | } |
| 7402 | |
| 7403 | // Check if both the elements and the Object.keys() have a single use. We only |
| 7404 | // check for live uses, and are ok if a branch which was previously using the |
| 7405 | // keys array has been removed since. |
| 7406 | if (!elems->hasOneLiveDefUse() || !guardshape->hasOneLiveDefUse() || |
| 7407 | !keys->hasOneLiveDefUse()) { |
| 7408 | return this; |
| 7409 | } |
| 7410 | |
| 7411 | // Check that the latest active resume point is the one from Object.keys(), in |
| 7412 | // order to steal it. If this is not the latest active resume point then some |
| 7413 | // side-effect might happen which updates the content of the object, making |
| 7414 | // any recovery of the keys exhibit a different behavior than expected. |
| 7415 | if (keys->toObjectKeys()->resumePoint() != block()->activeResumePoint(this)) { |
| 7416 | return this; |
| 7417 | } |
| 7418 | |
| 7419 | // Verify whether any resume point captures the keys array after any aliasing |
| 7420 | // mutations. If this were to be the case the recovery of ObjectKeys on |
| 7421 | // bailout might compute a version which might not match with the elided |
| 7422 | // result. |
| 7423 | // |
| 7424 | // Iterate over the resume point uses of ObjectKeys, and check whether the |
| 7425 | // instructions they are attached to are aliasing Object fields. If so, skip |
| 7426 | // this optimization. |
| 7427 | AliasSet enumKeysAliasSet = AliasSet::Load(AliasSet::Flag::ObjectFields); |
| 7428 | for (auto* use : UsesIterator(keys)) { |
| 7429 | if (!use->consumer()->isResumePoint()) { |
| 7430 | // There is only a single use, and this is the length computation as |
| 7431 | // asserted with `hasOneLiveDefUse`. |
| 7432 | continue; |
| 7433 | } |
| 7434 | |
| 7435 | MResumePoint* rp = use->consumer()->toResumePoint(); |
| 7436 | if (!rp->instruction()) { |
| 7437 | // If there is no instruction, this is a resume point which is attached to |
| 7438 | // the entry of a block. Thus no risk of mutating the object on which the |
| 7439 | // keys are queried. |
| 7440 | continue; |
| 7441 | } |
| 7442 | |
| 7443 | MInstruction* ins = rp->instruction(); |
| 7444 | if (ins == keys) { |
| 7445 | continue; |
| 7446 | } |
| 7447 | |
| 7448 | // Check whether the instruction can potentially alias the object fields of |
| 7449 | // the object from which we are querying the keys. |
| 7450 | AliasSet mightAlias = ins->getAliasSet() & enumKeysAliasSet; |
| 7451 | if (!mightAlias.isNone()) { |
| 7452 | return this; |
| 7453 | } |
| 7454 | } |
| 7455 | |
| 7456 | // Flag every instructions since Object.keys(..) as recovered on bailout, and |
| 7457 | // make Object.keys(..) be the recovered value in-place of the shape guard. |
| 7458 | setRecoveredOnBailout(); |
| 7459 | elems->setRecoveredOnBailout(); |
| 7460 | guardshape->replaceAllUsesWith(keys); |
| 7461 | guardshape->block()->discard(guardshape->toGuardShape()); |
| 7462 | keys->setRecoveredOnBailout(); |
| 7463 | |
| 7464 | // Steal the resume point from Object.keys, which is ok as we confirmed that |
| 7465 | // there is no other resume point in-between. |
| 7466 | MObjectKeysLength* keysLength = MObjectKeysLength::New(alloc, noproxy); |
| 7467 | keysLength->stealResumePoint(keys->toObjectKeys()); |
| 7468 | |
| 7469 | return keysLength; |
| 7470 | } |
| 7471 | |
| 7472 | MDefinition* MNormalizeSliceTerm::foldsTo(TempAllocator& alloc) { |
| 7473 | auto* length = this->length(); |
| 7474 | if (!length->isConstant() && !length->isArgumentsLength()) { |
| 7475 | return this; |
| 7476 | } |
| 7477 | |
| 7478 | if (length->isConstant()) { |
| 7479 | int32_t lengthConst = length->toConstant()->toInt32(); |
| 7480 | MOZ_ASSERT(lengthConst >= 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lengthConst >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lengthConst >= 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("lengthConst >= 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/jit/MIR.cpp" , 7480); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lengthConst >= 0" ")"); do { *((volatile int*)__null) = 7480; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7481 | |
| 7482 | // Result is always zero when |length| is zero. |
| 7483 | if (lengthConst == 0) { |
| 7484 | return length; |
| 7485 | } |
| 7486 | |
| 7487 | auto* value = this->value(); |
| 7488 | if (value->isConstant()) { |
| 7489 | int32_t valueConst = value->toConstant()->toInt32(); |
| 7490 | |
| 7491 | int32_t normalized; |
| 7492 | if (valueConst < 0) { |
| 7493 | normalized = std::max(valueConst + lengthConst, 0); |
| 7494 | } else { |
| 7495 | normalized = std::min(valueConst, lengthConst); |
| 7496 | } |
| 7497 | |
| 7498 | if (normalized == valueConst) { |
| 7499 | return value; |
| 7500 | } |
| 7501 | if (normalized == lengthConst) { |
| 7502 | return length; |
| 7503 | } |
| 7504 | return MConstant::New(alloc, Int32Value(normalized)); |
| 7505 | } |
| 7506 | |
| 7507 | return this; |
| 7508 | } |
| 7509 | |
| 7510 | auto* value = this->value(); |
| 7511 | if (value->isConstant()) { |
| 7512 | int32_t valueConst = value->toConstant()->toInt32(); |
| 7513 | |
| 7514 | // Minimum of |value| and |length|. |
| 7515 | if (valueConst > 0) { |
| 7516 | bool isMax = false; |
| 7517 | return MMinMax::New(alloc, value, length, MIRType::Int32, isMax); |
| 7518 | } |
| 7519 | |
| 7520 | // Maximum of |value + length| and zero. |
| 7521 | if (valueConst < 0) { |
| 7522 | // Safe to truncate because |length| is never negative. |
| 7523 | auto* add = MAdd::New(alloc, value, length, TruncateKind::Truncate); |
| 7524 | block()->insertBefore(this, add); |
| 7525 | |
| 7526 | auto* zero = MConstant::New(alloc, Int32Value(0)); |
| 7527 | block()->insertBefore(this, zero); |
| 7528 | |
| 7529 | bool isMax = true; |
| 7530 | return MMinMax::New(alloc, add, zero, MIRType::Int32, isMax); |
| 7531 | } |
| 7532 | |
| 7533 | // Directly return the value when it's zero. |
| 7534 | return value; |
| 7535 | } |
| 7536 | |
| 7537 | // Normalizing MArgumentsLength is a no-op. |
| 7538 | if (value->isArgumentsLength()) { |
| 7539 | return value; |
| 7540 | } |
| 7541 | |
| 7542 | return this; |
| 7543 | } |
| 7544 | |
| 7545 | bool MInt32ToStringWithBase::congruentTo(const MDefinition* ins) const { |
| 7546 | if (!ins->isInt32ToStringWithBase()) { |
| 7547 | return false; |
| 7548 | } |
| 7549 | if (ins->toInt32ToStringWithBase()->lowerCase() != lowerCase()) { |
| 7550 | return false; |
| 7551 | } |
| 7552 | return congruentIfOperandsEqual(ins); |
| 7553 | } |