X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FConstants.h;h=487dd6732afb69a2e28b17138e8e616507b52b8d;hb=b4cfd15d9901883cfb46ac3826e0a27573089372;hp=dd85b43bc7ac558acf75984ce0b62ac51342ecb4;hpb=579dca12c2cfd60bc18aaadbd5331897d48fec29;p=oota-llvm.git diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index dd85b43bc7a..487dd6732af 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -2,12 +2,13 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // -/// @file This file contains the declarations for the subclasses of Constant, +/// @file +/// This file contains the declarations for the subclasses of Constant, /// which represent the different flavors of constant values that live in LLVM. /// Note that Constants are immutable (once created they never change) and are /// fully shared by structural equivalence. This means that two structurally @@ -22,13 +23,17 @@ #include "llvm/Constant.h" #include "llvm/Type.h" +#include "llvm/OperandTraits.h" +#include "llvm/ADT/APInt.h" +#include "llvm/ADT/APFloat.h" +#include "llvm/ADT/SmallVector.h" namespace llvm { class ArrayType; class StructType; class PointerType; -class PackedType; +class VectorType; template struct ConstantCreator; @@ -36,61 +41,74 @@ template struct ConvertConstantType; //===----------------------------------------------------------------------===// -/// This is the shared class of boolean and integrer constants. This class +/// This is the shared class of boolean and integer constants. This class /// represents both boolean and integral constants. /// @brief Class for constant integers. class ConstantInt : public Constant { -protected: - uint64_t Val; -protected: + static ConstantInt *TheTrueVal, *TheFalseVal; + void *operator new(size_t, unsigned); // DO NOT IMPLEMENT ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT - ConstantInt(const Type *Ty, uint64_t V); - ConstantInt(const Type *Ty, int64_t V); - ConstantInt(bool V); - friend struct ConstantCreator; + ConstantInt(const IntegerType *Ty, const APInt& V); + APInt Val; + friend class LLVMContextImpl; +protected: + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } public: + /// Return the constant as an APInt value reference. This allows clients to + /// obtain a copy of the value, with all its precision in tact. + /// @brief Return the constant's value. + inline const APInt& getValue() const { + return Val; + } + + /// getBitWidth - Return the bitwidth of this constant. + unsigned getBitWidth() const { return Val.getBitWidth(); } + /// Return the constant as a 64-bit unsigned integer value after it - /// has been zero extended as appropriate for the type of this constant. + /// has been zero extended as appropriate for the type of this constant. Note + /// that this method can assert if the value does not fit in 64 bits. + /// @deprecated /// @brief Return the zero extended value. inline uint64_t getZExtValue() const { - return Val; + return Val.getZExtValue(); } /// Return the constant as a 64-bit integer value after it has been sign - /// sign extended as appropriate for the type of this constant. + /// extended as appropriate for the type of this constant. Note that + /// this method can assert if the value does not fit in 64 bits. + /// @deprecated /// @brief Return the sign extended value. inline int64_t getSExtValue() const { - unsigned Size = getType()->getPrimitiveSizeInBits(); - return (int64_t(Val) << (64-Size)) >> (64-Size); + return Val.getSExtValue(); } + /// A helper method that can be used to determine if the constant contained /// within is equal to a constant. This only works for very small values, /// because this is all that can be represented with all types. /// @brief Determine if this constant's value is same as an unsigned char. - bool equalsInt(unsigned char V) const { - assert(V <= 127 && - "equalsInt: Can only be used with very small positive constants!"); + bool equalsInt(uint64_t V) const { return Val == V; } /// getTrue/getFalse - Return the singleton true/false values. static inline ConstantInt *getTrue() { - static ConstantInt *T = 0; - if (T) return T; - return T = new ConstantInt(true); + if (TheTrueVal) return TheTrueVal; + return CreateTrueFalseVals(true); } static inline ConstantInt *getFalse() { - static ConstantInt *F = 0; - if (F) return F; - return F = new ConstantInt(false); + if (TheFalseVal) return TheFalseVal; + return CreateTrueFalseVals(false); } - /// Return a ConstantInt with the specified value for the specified type. The - /// value V will be canonicalized to a uint64_t but accessing it with either - /// getSExtValue() or getZExtValue() (ConstantInt) will yield the correct - /// sized/signed value for the type Ty. - /// @brief Get a ConstantInt for a specific value. - static ConstantInt *get(const Type *Ty, int64_t V); + /// getType - Specialize the getType() method to always return an IntegerType, + /// which reduces the amount of casting needed in parts of the compiler. + /// + inline const IntegerType *getType() const { + return reinterpret_cast(Value::getType()); + } /// This static method returns true if the type Ty is big enough to /// represent the value V. This can be used to avoid having the get method @@ -112,12 +130,27 @@ public: return Val == 0; } + /// This is just a convenience method to make client code smaller for a + /// common code. It also correctly performs the comparison without the + /// potential for an assertion from getZExtValue(). + bool isZero() const { + return Val == 0; + } + + /// This is just a convenience method to make client code smaller for a + /// common case. It also correctly performs the comparison without the + /// potential for an assertion from getZExtValue(). + /// @brief Determine if the value is one. + bool isOne() const { + return Val == 1; + } + /// This function will return true iff every bit in this constant is set /// to true. /// @returns true iff this constant's bits are all set to true. /// @brief Determine if the value is all ones. bool isAllOnesValue() const { - return getSExtValue() == -1; + return Val.isAllOnesValue(); } /// This function will return true iff this constant represents the largest @@ -126,13 +159,10 @@ public: /// by this type. /// @brief Determine if the value is maximal. bool isMaxValue(bool isSigned) const { - if (isSigned) { - int64_t V = getSExtValue(); - if (V < 0) return false; // Be careful about wrap-around on 'long's - ++V; - return !isValueValidForType(getType(), V) || V < 0; - } - return isAllOnesValue(); + if (isSigned) + return Val.isMaxSignedValue(); + else + return Val.isMaxValue(); } /// This function will return true iff this constant represents the smallest @@ -141,25 +171,38 @@ public: /// this type. /// @brief Determine if the value is minimal. bool isMinValue(bool isSigned) const { - if (isSigned) { - int64_t V = getSExtValue(); - if (V > 0) return false; // Be careful about wrap-around on 'long's - --V; - return !isValueValidForType(getType(), V) || V > 0; - } - return getZExtValue() == 0; + if (isSigned) + return Val.isMinSignedValue(); + else + return Val.isMinValue(); } - /// @returns the value for an integer constant of the given type that has all - /// its bits set to true. - /// @brief Get the all ones value - static ConstantInt *getAllOnesValue(const Type *Ty); + /// This function will return true iff this constant represents a value with + /// active bits bigger than 64 bits or a value greater than the given uint64_t + /// value. + /// @returns true iff this constant is greater or equal to the given number. + /// @brief Determine if the value is greater or equal to the given number. + bool uge(uint64_t Num) { + return Val.getActiveBits() > 64 || Val.getZExtValue() >= Num; + } + + /// getLimitedValue - If the value is smaller than the specified limit, + /// return it, otherwise return the limit value. This causes the value + /// to saturate to the limit. + /// @returns the min of the value of the constant and the specified value + /// @brief Get the constant's value with a saturation limit + uint64_t getLimitedValue(uint64_t Limit = ~0ULL) const { + return Val.getLimitedValue(Limit); + } /// @brief Methods to support type inquiry through isa, cast, and dyn_cast. static inline bool classof(const ConstantInt *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantIntVal; + return V->getValueID() == ConstantIntVal; } + static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; } +private: + static ConstantInt *CreateTrueFalseVals(bool WhichOne); }; @@ -167,35 +210,54 @@ public: /// ConstantFP - Floating Point Values [float, double] /// class ConstantFP : public Constant { - double Val; - friend struct ConstantCreator; - friend struct ConstantCreator; + APFloat Val; + void *operator new(size_t, unsigned);// DO NOT IMPLEMENT ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT + friend class LLVMContextImpl; +protected: + ConstantFP(const Type *Ty, const APFloat& V); protected: - ConstantFP(const Type *Ty, double V); + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } public: - /// get() - Static factory methods - Return objects of the specified value - static ConstantFP *get(const Type *Ty, double V); - /// isValueValidForType - return true if Ty is big enough to represent V. - static bool isValueValidForType(const Type *Ty, double V); - inline double getValue() const { return Val; } + static bool isValueValidForType(const Type *Ty, const APFloat& V); + inline const APFloat& getValueAPF() const { return Val; } /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. Don't depend on == for doubles to tell us it's zero, it /// considers -0.0 to be null as well as 0.0. :( virtual bool isNullValue() const; + + /// isNegativeZeroValue - Return true if the value is what would be returned + /// by getZeroValueForNegation. + virtual bool isNegativeZeroValue() const { + return Val.isZero() && Val.isNegative(); + } /// isExactlyValue - We don't rely on operator== working on double values, as /// it returns true for things that are clearly not equal, like -0.0 and 0.0. /// As such, this method can be used to do an exact bit-for-bit comparison of - /// two floating point values. - bool isExactlyValue(double V) const; - + /// two floating point values. The version with a double operand is retained + /// because it's so convenient to write isExactlyValue(2.0), but please use + /// it only for simple constants. + bool isExactlyValue(const APFloat& V) const; + + bool isExactlyValue(double V) const { + bool ignored; + // convert is not supported on this type + if (&Val.getSemantics() == &APFloat::PPCDoubleDouble) + return false; + APFloat FV(V); + FV.convert(Val.getSemantics(), APFloat::rmNearestTiesToEven, &ignored); + return isExactlyValue(FV); + } /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const ConstantFP *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantFPVal; + return V->getValueID() == ConstantFPVal; } }; @@ -204,14 +266,20 @@ public: /// class ConstantAggregateZero : public Constant { friend struct ConstantCreator; + void *operator new(size_t, unsigned); // DO NOT IMPLEMENT ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT protected: - ConstantAggregateZero(const Type *Ty) - : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {} + explicit ConstantAggregateZero(const Type *ty) + : Constant(ty, ConstantAggregateZeroVal, 0, 0) {} +protected: + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } public: /// get() - static factory method for creating a null aggregate. It is /// illegal to call this method with a non-aggregate type. - static Constant *get(const Type *Ty); + static ConstantAggregateZero *get(const Type *Ty); /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. @@ -223,7 +291,7 @@ public: /// static bool classof(const ConstantAggregateZero *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantAggregateZeroVal; + return V->getValueID() == ConstantAggregateZeroVal; } }; @@ -237,18 +305,12 @@ class ConstantArray : public Constant { ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT protected: ConstantArray(const ArrayType *T, const std::vector &Val); - ~ConstantArray(); public: /// get() - Static factory methods - Return objects of the specified value static Constant *get(const ArrayType *T, const std::vector &); - /// This method constructs a ConstantArray and initializes it with a text - /// string. The default behavior (AddNull==true) causes a null terminator to - /// be placed at the end of the array. This effectively increases the length - /// of the array by one (you've been warned). However, in some situations - /// this is not desired so if AddNull==false then the string is copied without - /// null termination. - static Constant *get(const std::string &Initializer, bool AddNull = true); + /// Transparently provide more efficient getOperand methods. + DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); /// getType - Specialize the getType() method to always return an ArrayType, /// which reduces the amount of casting needed in parts of the compiler. @@ -257,12 +319,14 @@ public: return reinterpret_cast(Value::getType()); } - /// isString - This method returns true if the array is an array of sbyte or - /// ubyte, and if the elements of the array are all ConstantInt's. + /// isString - This method returns true if the array is an array of i8 and + /// the elements of the array are all ConstantInt's. bool isString() const; /// isCString - This method returns true if the array is a string (see + /// @verbatim /// isString) and it ends in a null byte \0 and does not contains any other + /// @endverbatim /// null bytes except its terminator. bool isCString() const; @@ -282,10 +346,15 @@ public: /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const ConstantArray *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantArrayVal; + return V->getValueID() == ConstantArrayVal; } }; +template <> +struct OperandTraits : VariadicOperandTraits<> { +}; + +DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantArray, Constant) //===----------------------------------------------------------------------===// // ConstantStruct - Constant Struct Declarations @@ -296,12 +365,13 @@ class ConstantStruct : public Constant { ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT protected: ConstantStruct(const StructType *T, const std::vector &Val); - ~ConstantStruct(); public: /// get() - Static factory methods - Return objects of the specified value /// static Constant *get(const StructType *T, const std::vector &V); - static Constant *get(const std::vector &V, bool packed = false); + + /// Transparently provide more efficient getOperand methods. + DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); /// getType() specialization - Reduce amount of casting... /// @@ -322,65 +392,88 @@ public: /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const ConstantStruct *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantStructVal; + return V->getValueID() == ConstantStructVal; } }; +template <> +struct OperandTraits : VariadicOperandTraits<> { +}; + +DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant) + //===----------------------------------------------------------------------===// -/// ConstantPacked - Constant Packed Declarations +/// ConstantVector - Constant Vector Declarations /// -class ConstantPacked : public Constant { - friend struct ConstantCreator >; - ConstantPacked(const ConstantPacked &); // DO NOT IMPLEMENT + ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT protected: - ConstantPacked(const PackedType *T, const std::vector &Val); - ~ConstantPacked(); + ConstantVector(const VectorType *T, const std::vector &Val); public: /// get() - Static factory methods - Return objects of the specified value - static Constant *get(const PackedType *T, const std::vector &); - static Constant *get(const std::vector &V); + static Constant *get(const VectorType *T, const std::vector &); + + /// Transparently provide more efficient getOperand methods. + DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); - /// getType - Specialize the getType() method to always return an PackedType, + /// getType - Specialize the getType() method to always return a VectorType, /// which reduces the amount of casting needed in parts of the compiler. /// - inline const PackedType *getType() const { - return reinterpret_cast(Value::getType()); + inline const VectorType *getType() const { + return reinterpret_cast(Value::getType()); } - - /// @returns the value for an packed integer constant of the given type that - /// has all its bits set to true. - /// @brief Get the all ones value - static ConstantPacked *getAllOnesValue(const PackedType *Ty); /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. This always returns false because zero arrays are always + /// getNullValue. This always returns false because zero vectors are always /// created as ConstantAggregateZero objects. virtual bool isNullValue() const { return false; } + /// This function will return true iff every element in this vector constant + /// is set to all ones. + /// @returns true iff this constant's emements are all set to all ones. + /// @brief Determine if the value is all ones. + bool isAllOnesValue() const; + + /// getSplatValue - If this is a splat constant, meaning that all of the + /// elements have the same value, return that value. Otherwise return NULL. + Constant *getSplatValue(); + virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); /// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const ConstantPacked *) { return true; } + static inline bool classof(const ConstantVector *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantPackedVal; + return V->getValueID() == ConstantVectorVal; } }; +template <> +struct OperandTraits : VariadicOperandTraits<> { +}; + +DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantVector, Constant) + //===----------------------------------------------------------------------===// /// ConstantPointerNull - a constant pointer value that points to null /// class ConstantPointerNull : public Constant { friend struct ConstantCreator; + void *operator new(size_t, unsigned); // DO NOT IMPLEMENT ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT protected: - ConstantPointerNull(const PointerType *T) + explicit ConstantPointerNull(const PointerType *T) : Constant(reinterpret_cast(T), Value::ConstantPointerNullVal, 0, 0) {} +protected: + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } public: - /// get() - Static factory methods - Return objects of the specified value static ConstantPointerNull *get(const PointerType *T); @@ -400,7 +493,7 @@ public: /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const ConstantPointerNull *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantPointerNullVal; + return V->getValueID() == ConstantPointerNullVal; } }; @@ -417,8 +510,8 @@ class ConstantExpr : public Constant { friend struct ConvertConstantType; protected: - ConstantExpr(const Type *Ty, unsigned Opcode, Use *Ops, unsigned NumOps) - : Constant(Ty, ConstantExprVal, Ops, NumOps) { + ConstantExpr(const Type *ty, unsigned Opcode, Use *Ops, unsigned NumOps) + : Constant(ty, ConstantExprVal, Ops, NumOps) { // Operation type (an Instruction opcode) is stored as the SubclassData. SubclassData = Opcode; } @@ -427,20 +520,23 @@ protected: // ConstantExprs in intermediate forms. static Constant *getTy(const Type *Ty, unsigned Opcode, Constant *C1, Constant *C2); - static Constant *getCompareTy(unsigned short pred, Constant *C1, + static Constant *getCompareTy(unsigned short pred, Constant *C1, Constant *C2); - static Constant *getShiftTy(const Type *Ty, - unsigned Opcode, Constant *C1, Constant *C2); static Constant *getSelectTy(const Type *Ty, Constant *C1, Constant *C2, Constant *C3); static Constant *getGetElementPtrTy(const Type *Ty, Constant *C, - const std::vector &IdxList); + Value* const *Idxs, unsigned NumIdxs); static Constant *getExtractElementTy(const Type *Ty, Constant *Val, Constant *Idx); static Constant *getInsertElementTy(const Type *Ty, Constant *Val, Constant *Elt, Constant *Idx); static Constant *getShuffleVectorTy(const Type *Ty, Constant *V1, Constant *V2, Constant *Mask); + static Constant *getExtractValueTy(const Type *Ty, Constant *Agg, + const unsigned *Idxs, unsigned NumIdxs); + static Constant *getInsertValueTy(const Type *Ty, Constant *Agg, + Constant *Val, + const unsigned *Idxs, unsigned NumIdxs); public: // Static methods to construct a ConstantExpr of different kinds. Note that @@ -463,6 +559,9 @@ public: static Constant *getIntToPtr(Constant *C, const Type *Ty); static Constant *getBitCast (Constant *C, const Type *Ty); + /// Transparently provide more efficient getOperand methods. + DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); + // @brief Convenience function for getting one of the casting operations // using a CastOps opcode. static Constant *getCast( @@ -514,21 +613,16 @@ public: /// @brief Return true if this is a compare constant expression bool isCompare() const; + /// @brief Return true if this is an insertvalue or extractvalue expression, + /// and the getIndices() method may be used. + bool hasIndices() const; + /// Select constant expr /// static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) { return getSelectTy(V1->getType(), C, V1, V2); } - /// getSizeOf constant expr - computes the size of a type in a target - /// independent way (Note: the return type is a ULong). - /// - static Constant *getSizeOf(const Type *Ty); - - /// getPtrPtrFromArrayPtr constant expr - given a pointer to a constant array, - /// return a pointer to a pointer of the array element type. - static Constant *getPtrPtrFromArrayPtr(Constant *C); - /// ConstantExpr::get - Return a binary or shift operator constant expression, /// folding if possible. /// @@ -540,37 +634,24 @@ public: /// ConstantExpr::get* - Return some common constants without having to /// specify the full Instruction::OPCODE identifier. /// - static Constant *getNeg(Constant *C); - static Constant *getNot(Constant *C); - static Constant *getAdd(Constant *C1, Constant *C2); - static Constant *getSub(Constant *C1, Constant *C2); - static Constant *getMul(Constant *C1, Constant *C2); - static Constant *getUDiv(Constant *C1, Constant *C2); - static Constant *getSDiv(Constant *C1, Constant *C2); - static Constant *getFDiv(Constant *C1, Constant *C2); - static Constant *getURem(Constant *C1, Constant *C2); // unsigned rem - static Constant *getSRem(Constant *C1, Constant *C2); // signed rem - static Constant *getFRem(Constant *C1, Constant *C2); - static Constant *getAnd(Constant *C1, Constant *C2); - static Constant *getOr(Constant *C1, Constant *C2); - static Constant *getXor(Constant *C1, Constant *C2); - static Constant* getICmp(unsigned short pred, Constant* LHS, Constant* RHS); - static Constant* getFCmp(unsigned short pred, Constant* LHS, Constant* RHS); - static Constant *getShl(Constant *C1, Constant *C2); - static Constant *getLShr(Constant *C1, Constant *C2); - static Constant *getAShr(Constant *C1, Constant *C2); + static Constant *getICmp(unsigned short pred, Constant *LHS, Constant *RHS); + static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS); /// Getelementptr form. std::vector is only accepted for convenience: /// all elements must be Constant's. /// static Constant *getGetElementPtr(Constant *C, - const std::vector &IdxList); + Constant* const *IdxList, unsigned NumIdx); static Constant *getGetElementPtr(Constant *C, - const std::vector &IdxList); - + Value* const *IdxList, unsigned NumIdx); + static Constant *getExtractElement(Constant *Vec, Constant *Idx); static Constant *getInsertElement(Constant *Vec, Constant *Elt,Constant *Idx); static Constant *getShuffleVector(Constant *V1, Constant *V2, Constant *Mask); + static Constant *getExtractValue(Constant *Agg, + const unsigned *IdxList, unsigned NumIdx); + static Constant *getInsertValue(Constant *Agg, Constant *Val, + const unsigned *IdxList, unsigned NumIdx); /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. @@ -583,6 +664,10 @@ public: /// not an ICMP or FCMP constant expression. unsigned getPredicate() const; + /// getIndices - Assert that this is an insertvalue or exactvalue + /// expression and return the list of indices. + const SmallVector &getIndices() const; + /// getOpcodeName - Return a string representation for an opcode. const char *getOpcodeName() const; @@ -593,27 +678,26 @@ public: /// getWithOperands - This returns the current constant expression with the /// operands replaced with the specified values. The specified operands must /// match count and type with the existing ones. - Constant *getWithOperands(const std::vector &Ops) const; + Constant *getWithOperands(const std::vector &Ops) const { + return getWithOperands(&Ops[0], (unsigned)Ops.size()); + } + Constant *getWithOperands(Constant* const *Ops, unsigned NumOps) const; virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); - /// Override methods to provide more type information... - inline Constant *getOperand(unsigned i) { - return cast(User::getOperand(i)); - } - inline Constant *getOperand(unsigned i) const { - return const_cast(cast(User::getOperand(i))); - } - - /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const ConstantExpr *) { return true; } static inline bool classof(const Value *V) { - return V->getValueType() == ConstantExprVal; + return V->getValueID() == ConstantExprVal; } }; +template <> +struct OperandTraits : VariadicOperandTraits<1> { +}; + +DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant) //===----------------------------------------------------------------------===// /// UndefValue - 'undef' values are things that do not have specified contents. @@ -623,9 +707,15 @@ public: /// class UndefValue : public Constant { friend struct ConstantCreator; + void *operator new(size_t, unsigned); // DO NOT IMPLEMENT UndefValue(const UndefValue &); // DO NOT IMPLEMENT protected: - UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {} + explicit UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {} +protected: + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } public: /// get() - Static factory methods - Return an 'undef' object of the specified /// type. @@ -641,7 +731,58 @@ public: /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const UndefValue *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == UndefValueVal; + return V->getValueID() == UndefValueVal; + } +}; + +//===----------------------------------------------------------------------===// +/// MDString - a single uniqued string. +/// These are used to efficiently contain a byte sequence for metadata. +/// +class MDString : public Constant { + MDString(const MDString &); // DO NOT IMPLEMENT + void *operator new(size_t, unsigned); // DO NOT IMPLEMENT + MDString(const char *begin, const char *end); + + const char *StrBegin, *StrEnd; + friend class LLVMContextImpl; +protected: + // allocate space for exactly zero operands + void *operator new(size_t s) { + return User::operator new(s, 0); + } +public: + /// size() - The length of this string. + /// + intptr_t size() const { return StrEnd - StrBegin; } + + /// begin() - Pointer to the first byte of the string. + /// + const char *begin() const { return StrBegin; } + + /// end() - Pointer to one byte past the end of the string. + /// + const char *end() const { return StrEnd; } + + /// getType() specialization - Type is always MetadataTy. + /// + inline const Type *getType() const { + return Type::MetadataTy; + } + + /// isNullValue - Return true if this is the value that would be returned by + /// getNullValue. This always returns false because getNullValue will never + /// produce metadata. + virtual bool isNullValue() const { + return false; + } + + virtual void destroyConstant(); + + /// Methods for support type inquiry through isa, cast, and dyn_cast: + static inline bool classof(const MDString *) { return true; } + static bool classof(const Value *V) { + return V->getValueID() == MDStringVal; } };