| //===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// @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 |
| /// equivalent constants will always have the same address. Constant's are |
| /// created on demand as needed and never deleted: thus clients don't have to |
| /// worry about the lifetime of the objects. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CONSTANTS_H |
| #define LLVM_CONSTANTS_H |
| |
| #include "llvm/Constant.h" |
| #include "llvm/Type.h" |
| |
| namespace llvm { |
| |
| class ArrayType; |
| class StructType; |
| class PointerType; |
| class PackedType; |
| |
| template<class ConstantClass, class TypeClass, class ValType> |
| struct ConstantCreator; |
| template<class ConstantClass, class TypeClass> |
| struct ConvertConstantType; |
| |
| //===----------------------------------------------------------------------===// |
| /// This is the shared superclass of boolean and integer constants. This class |
| /// just defines some common interfaces to be implemented by the subclasses. |
| /// @brief An abstract class for integer constants. |
| class ConstantIntegral : public Constant { |
| protected: |
| uint64_t Val; |
| ConstantIntegral(const Type *Ty, ValueTy VT, uint64_t V); |
| public: |
| /// Return the constant as a 64-bit unsigned integer value after it |
| /// has been zero extended as appropriate for the type of this constant. |
| /// @brief Return the zero extended value. |
| inline uint64_t getZExtValue() const { |
| return Val; |
| } |
| |
| /// Return the constant as a 64-bit integer value after it has been sign |
| /// sign extended as appropriate for the type of this constant. |
| /// @brief Return the sign extended value. |
| inline int64_t getSExtValue() const { |
| unsigned Size = getType()->getPrimitiveSizeInBits(); |
| return (int64_t(Val) << (64-Size)) >> (64-Size); |
| } |
| |
| /// This function is implemented by subclasses and will return true iff this |
| /// constant represents the the "null" value that would be returned by the |
| /// getNullValue method. |
| /// @returns true if the constant's value is 0. |
| /// @brief Determine if the value is null. |
| virtual bool isNullValue() const = 0; |
| |
| /// This function is implemented by sublcasses and will return true iff this |
| /// constant represents the the largest value that may be represented by this |
| /// constant's type. |
| /// @returns true if the constant's value is maximal. |
| /// @brief Determine if the value is maximal. |
| virtual bool isMaxValue() const = 0; |
| |
| /// This function is implemented by subclasses and will return true iff this |
| /// constant represents the smallest value that may be represented by this |
| /// constant's type. |
| /// @returns true if the constant's value is minimal |
| /// @brief Determine if the value is minimal. |
| virtual bool isMinValue() const = 0; |
| |
| /// This function is implemented by subclasses and will return true iff every |
| /// bit in this constant is set to true. |
| /// @returns true if all bits of the constant are ones. |
| /// @brief Determine if the value is all ones. |
| virtual bool isAllOnesValue() const = 0; |
| |
| /// @returns the largest value for an integer constant of the given type |
| /// @brief Get the maximal value |
| static ConstantIntegral *getMaxValue(const Type *Ty); |
| |
| /// @returns the smallest value for an integer constant of the given type |
| /// @brief Get the minimal value |
| static ConstantIntegral *getMinValue(const Type *Ty); |
| |
| /// @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 ConstantIntegral *getAllOnesValue(const Type *Ty); |
| |
| /// Methods to support type inquiry through isa, cast, and dyn_cast: |
| static inline bool classof(const ConstantIntegral *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == ConstantBoolVal || |
| V->getValueType() == ConstantIntVal; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| /// This concrete class represents constant values of type BoolTy. There are |
| /// only two instances of this class constructed: the True and False static |
| /// members. The constructor is hidden to ensure this invariant. |
| /// @brief Constant Boolean class |
| class ConstantBool : public ConstantIntegral { |
| ConstantBool(bool V); |
| public: |
| /// getTrue/getFalse - Return the singleton true/false values. |
| static ConstantBool *getTrue(); |
| static ConstantBool *getFalse(); |
| |
| /// This method is provided mostly for compatibility with the other |
| /// ConstantIntegral subclasses. |
| /// @brief Static factory method for getting a ConstantBool instance. |
| static ConstantBool *get(bool Value) { return Value ? getTrue() : getFalse();} |
| |
| /// This method is provided mostly for compatibility with the other |
| /// ConstantIntegral subclasses. |
| /// @brief Static factory method for getting a ConstantBool instance. |
| static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); } |
| |
| /// Returns the opposite value of this ConstantBool value. |
| /// @brief Get inverse value. |
| inline ConstantBool *inverted() const { |
| return getValue() ? getFalse() : getTrue(); |
| } |
| |
| /// @returns the value of this ConstantBool |
| /// @brief return the boolean value of this constant. |
| inline bool getValue() const { return static_cast<bool>(getZExtValue()); } |
| |
| /// @see ConstantIntegral for details |
| /// @brief Implement overrides |
| virtual bool isNullValue() const { return getValue() == false; } |
| virtual bool isMaxValue() const { return getValue() == true; } |
| virtual bool isMinValue() const { return getValue() == false; } |
| virtual bool isAllOnesValue() const { return getValue() == true; } |
| |
| /// @brief Methods to support type inquiry through isa, cast, and dyn_cast: |
| static inline bool classof(const ConstantBool *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == ConstantBoolVal; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| /// This is concrete integer subclass of ConstantIntegral that represents |
| /// both signed and unsigned integral constants, other than boolean. |
| /// @brief Class for constant integers. |
| class ConstantInt : public ConstantIntegral { |
| protected: |
| ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT |
| ConstantInt(const Type *Ty, uint64_t V); |
| ConstantInt(const Type *Ty, int64_t V); |
| friend struct ConstantCreator<ConstantInt, Type, uint64_t>; |
| public: |
| /// 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!"); |
| return Val == V; |
| } |
| |
| /// 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() (ConstantIntegral) 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); |
| |
| /// 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 |
| /// assert when V is larger than Ty can represent. |
| /// @returns true if V is a valid value for type Ty |
| /// @brief Determine if the value is in range for the given type. |
| static bool isValueValidForType(const Type *Ty, int64_t V); |
| |
| /// @returns true if this is the null integer value. |
| /// @see ConstantIntegral for details |
| /// @brief Implement override. |
| virtual bool isNullValue() const { return Val == 0; } |
| |
| /// @returns true iff this constant's bits are all set to true. |
| /// @see ConstantIntegral |
| /// @brief Override implementation |
| virtual bool isAllOnesValue() const { return getSExtValue() == -1; } |
| |
| /// @returns true iff this is the largest value that may be represented |
| /// by this type. |
| /// @see ConstantIntegeral |
| /// @brief Override implementation |
| virtual bool isMaxValue() const { |
| if (getType()->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(); |
| } |
| |
| /// @returns true if this is the smallest value that may be represented by |
| /// this type. |
| /// @see ConstantIntegral |
| /// @brief Override implementation |
| virtual bool isMinValue() const { |
| if (getType()->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; |
| } |
| |
| /// @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; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| /// ConstantFP - Floating Point Values [float, double] |
| /// |
| class ConstantFP : public Constant { |
| double Val; |
| friend struct ConstantCreator<ConstantFP, Type, uint64_t>; |
| friend struct ConstantCreator<ConstantFP, Type, uint32_t>; |
| ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT |
| protected: |
| ConstantFP(const Type *Ty, double V); |
| 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; } |
| |
| /// 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; |
| |
| /// 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; |
| |
| /// 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; |
| } |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| /// ConstantAggregateZero - All zero aggregate value |
| /// |
| class ConstantAggregateZero : public Constant { |
| friend struct ConstantCreator<ConstantAggregateZero, Type, char>; |
| ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT |
| protected: |
| ConstantAggregateZero(const Type *Ty) |
| : Constant(Ty, ConstantAggregateZeroVal, 0, 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); |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. |
| virtual bool isNullValue() const { return true; } |
| |
| virtual void destroyConstant(); |
| |
| /// Methods for support type inquiry through isa, cast, and dyn_cast: |
| /// |
| static bool classof(const ConstantAggregateZero *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == ConstantAggregateZeroVal; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| /// ConstantArray - Constant Array Declarations |
| /// |
| class ConstantArray : public Constant { |
| friend struct ConstantCreator<ConstantArray, ArrayType, |
| std::vector<Constant*> >; |
| ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT |
| protected: |
| ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val); |
| ~ConstantArray(); |
| public: |
| /// get() - Static factory methods - Return objects of the specified value |
| static Constant *get(const ArrayType *T, const std::vector<Constant*> &); |
| |
| /// 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); |
| |
| /// getType - Specialize the getType() method to always return an ArrayType, |
| /// which reduces the amount of casting needed in parts of the compiler. |
| /// |
| inline const ArrayType *getType() const { |
| return reinterpret_cast<const ArrayType*>(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. |
| bool isString() const; |
| |
| /// getAsString - If this array is isString(), then this method converts the |
| /// array to an std::string and returns it. Otherwise, it asserts out. |
| /// |
| std::string getAsString() const; |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. This always returns false because zero arrays are always |
| /// created as ConstantAggregateZero objects. |
| virtual bool isNullValue() const { return false; } |
| |
| 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 ConstantArray *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == ConstantArrayVal; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // ConstantStruct - Constant Struct Declarations |
| // |
| class ConstantStruct : public Constant { |
| friend struct ConstantCreator<ConstantStruct, StructType, |
| std::vector<Constant*> >; |
| ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT |
| protected: |
| ConstantStruct(const StructType *T, const std::vector<Constant*> &Val); |
| ~ConstantStruct(); |
| public: |
| /// get() - Static factory methods - Return objects of the specified value |
| /// |
| static Constant *get(const StructType *T, const std::vector<Constant*> &V); |
| static Constant *get(const std::vector<Constant*> &V); |
| |
| /// getType() specialization - Reduce amount of casting... |
| /// |
| inline const StructType *getType() const { |
| return reinterpret_cast<const StructType*>(Value::getType()); |
| } |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. This always returns false because zero structs are always |
| /// created as ConstantAggregateZero objects. |
| virtual bool isNullValue() const { |
| return false; |
| } |
| |
| 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 ConstantStruct *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == ConstantStructVal; |
| } |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| /// ConstantPacked - Constant Packed Declarations |
| /// |
| class ConstantPacked : public Constant { |
| friend struct ConstantCreator<ConstantPacked, PackedType, |
| std::vector<Constant*> >; |
| ConstantPacked(const ConstantPacked &); // DO NOT IMPLEMENT |
| protected: |
| ConstantPacked(const PackedType *T, const std::vector<Constant*> &Val); |
| ~ConstantPacked(); |
| public: |
| /// get() - Static factory methods - Return objects of the specified value |
| static Constant *get(const PackedType *T, const std::vector<Constant*> &); |
| static Constant *get(const std::vector<Constant*> &V); |
| |
| /// getType - Specialize the getType() method to always return an PackedType, |
| /// which reduces the amount of casting needed in parts of the compiler. |
| /// |
| inline const PackedType *getType() const { |
| return reinterpret_cast<const PackedType*>(Value::getType()); |
| } |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. This always returns false because zero arrays are always |
| /// created as ConstantAggregateZero objects. |
| virtual bool isNullValue() const { return false; } |
| |
| 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 bool classof(const Value *V) { |
| return V->getValueType() == ConstantPackedVal; |
| } |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| /// ConstantPointerNull - a constant pointer value that points to null |
| /// |
| class ConstantPointerNull : public Constant { |
| friend struct ConstantCreator<ConstantPointerNull, PointerType, char>; |
| ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT |
| protected: |
| ConstantPointerNull(const PointerType *T) |
| : Constant(reinterpret_cast<const Type*>(T), |
| Value::ConstantPointerNullVal, 0, 0) {} |
| |
| public: |
| |
| /// get() - Static factory methods - Return objects of the specified value |
| static ConstantPointerNull *get(const PointerType *T); |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. |
| virtual bool isNullValue() const { return true; } |
| |
| virtual void destroyConstant(); |
| |
| /// getType - Specialize the getType() method to always return an PointerType, |
| /// which reduces the amount of casting needed in parts of the compiler. |
| /// |
| inline const PointerType *getType() const { |
| return reinterpret_cast<const PointerType*>(Value::getType()); |
| } |
| |
| /// 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; |
| } |
| }; |
| |
| |
| /// ConstantExpr - a constant value that is initialized with an expression using |
| /// other constant values. |
| /// |
| /// This class uses the standard Instruction opcodes to define the various |
| /// constant expressions. The Opcode field for the ConstantExpr class is |
| /// maintained in the Value::SubclassData field. |
| class ConstantExpr : public Constant { |
| friend struct ConstantCreator<ConstantExpr,Type, |
| std::pair<unsigned, std::vector<Constant*> > >; |
| friend struct ConvertConstantType<ConstantExpr, Type>; |
| |
| protected: |
| 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; |
| } |
| |
| // These private methods are used by the type resolution code to create |
| // ConstantExprs in intermediate forms. |
| static Constant *getTy(const Type *Ty, unsigned Opcode, |
| 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<Value*> &IdxList); |
| 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); |
| |
| public: |
| // Static methods to construct a ConstantExpr of different kinds. Note that |
| // these methods may return a object that is not an instance of the |
| // ConstantExpr class, because they will attempt to fold the constant |
| // expression into something simpler if possible. |
| |
| /// Cast constant expr |
| /// |
| static Constant *getCast(Constant *C, const Type *Ty); |
| static Constant *getSignExtend(Constant *C, const Type *Ty); |
| static Constant *getZeroExtend(Constant *C, const Type *Ty); |
| |
| /// 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. |
| /// |
| static Constant *get(unsigned Opcode, Constant *C1, Constant *C2); |
| |
| /// 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 *getDiv(Constant *C1, Constant *C2); |
| static Constant *getRem(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 *getSetEQ(Constant *C1, Constant *C2); |
| static Constant *getSetNE(Constant *C1, Constant *C2); |
| static Constant *getSetLT(Constant *C1, Constant *C2); |
| static Constant *getSetGT(Constant *C1, Constant *C2); |
| static Constant *getSetLE(Constant *C1, Constant *C2); |
| static Constant *getSetGE(Constant *C1, Constant *C2); |
| static Constant *getShl(Constant *C1, Constant *C2); |
| static Constant *getShr(Constant *C1, Constant *C2); |
| |
| static Constant *getUShr(Constant *C1, Constant *C2); // unsigned shr |
| static Constant *getSShr(Constant *C1, Constant *C2); // signed shr |
| |
| /// Getelementptr form. std::vector<Value*> is only accepted for convenience: |
| /// all elements must be Constant's. |
| /// |
| static Constant *getGetElementPtr(Constant *C, |
| const std::vector<Constant*> &IdxList); |
| static Constant *getGetElementPtr(Constant *C, |
| const std::vector<Value*> &IdxList); |
| |
| 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); |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. |
| virtual bool isNullValue() const { return false; } |
| |
| /// getOpcode - Return the opcode at the root of this constant expression |
| unsigned getOpcode() const { return SubclassData; } |
| |
| /// getOpcodeName - Return a string representation for an opcode. |
| const char *getOpcodeName() const; |
| |
| /// getWithOperandReplaced - Return a constant expression identical to this |
| /// one, but with the specified operand set to the specified value. |
| Constant *getWithOperandReplaced(unsigned OpNo, Constant *Op) const; |
| |
| /// 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<Constant*> &Ops) 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<Constant>(User::getOperand(i)); |
| } |
| inline Constant *getOperand(unsigned i) const { |
| return const_cast<Constant*>(cast<Constant>(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; |
| } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| /// UndefValue - 'undef' values are things that do not have specified contents. |
| /// These are used for a variety of purposes, including global variable |
| /// initializers and operands to instructions. 'undef' values can occur with |
| /// any type. |
| /// |
| class UndefValue : public Constant { |
| friend struct ConstantCreator<UndefValue, Type, char>; |
| UndefValue(const UndefValue &); // DO NOT IMPLEMENT |
| protected: |
| UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {} |
| public: |
| /// get() - Static factory methods - Return an 'undef' object of the specified |
| /// type. |
| /// |
| static UndefValue *get(const Type *T); |
| |
| /// isNullValue - Return true if this is the value that would be returned by |
| /// getNullValue. |
| 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 UndefValue *) { return true; } |
| static bool classof(const Value *V) { |
| return V->getValueType() == UndefValueVal; |
| } |
| }; |
| |
| } // End llvm namespace |
| |
| #endif |