X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FConstants.h;h=c69bad4b3be90ee31d648ccf2cb313494d22ea13;hb=fc82fabe00b0b820e3c0d7fc9e289bace0295f11;hp=f0f8146c75b2e57fb2ef7619ac35c8ba3de0883b;hpb=8949477ae43883f229717f65763e5c502fd914c7;p=oota-llvm.git diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index f0f8146c75b..c69bad4b3be 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -2,18 +2,18 @@ // // 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. // //===----------------------------------------------------------------------===// // -// 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. +/// @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. // //===----------------------------------------------------------------------===// @@ -22,13 +22,15 @@ #include "llvm/Constant.h" #include "llvm/Type.h" +#include "llvm/ADT/APInt.h" +#include "llvm/ADT/APFloat.h" namespace llvm { class ArrayType; class StructType; class PointerType; -class PackedType; +class VectorType; template struct ConstantCreator; @@ -36,234 +38,175 @@ template struct ConvertConstantType; //===----------------------------------------------------------------------===// -/// ConstantIntegral - Shared superclass of boolean and integer constants. -/// -/// This class just defines some common interfaces to be implemented. -/// -class ConstantIntegral : public Constant { -protected: - union { - int64_t Signed; - uint64_t Unsigned; - } Val; - ConstantIntegral(const Type *Ty, ValueTy VT, uint64_t V); +/// 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 { + static ConstantInt *TheTrueVal, *TheFalseVal; + ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT + ConstantInt(const IntegerType *Ty, const APInt& V); + APInt Val; public: - - /// getRawValue - return the underlying value of this constant as a 64-bit - /// unsigned integer value. - /// - inline uint64_t getRawValue() const { return Val.Unsigned; } + /// 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; + } - /// getZExtValue - Return the constant zero extended as appropriate for this - /// type. + /// 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. 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 { - unsigned Size = getType()->getPrimitiveSizeInBits(); - return Val.Unsigned & (~uint64_t(0UL) >> (64-Size)); + return Val.getZExtValue(); } - /// getSExtValue - Return the constant sign extended as appropriate for this - /// type. + /// Return the constant as a 64-bit integer value after it has been sign + /// sign 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 (Val.Signed << (64-Size)) >> (64-Size); + return Val.getSExtValue(); } - - /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. - /// - virtual bool isNullValue() const = 0; - - /// isMaxValue - Return true if this is the largest value that may be - /// represented by this type. - /// - virtual bool isMaxValue() const = 0; - - /// isMinValue - Return true if this is the smallest value that may be - /// represented by this type. - /// - virtual bool isMinValue() const = 0; - - /// isAllOnesValue - Return true if every bit in this constant is set to true. - /// - virtual bool isAllOnesValue() const = 0; - - /// Static constructor to get the maximum/minimum/allones constant of - /// specified (integral) type... - /// - static ConstantIntegral *getMaxValue(const Type *Ty); - static ConstantIntegral *getMinValue(const Type *Ty); - static ConstantIntegral *getAllOnesValue(const Type *Ty); - - /// Methods for 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() == ConstantSIntVal || - V->getValueType() == ConstantUIntVal; - } -}; - - -//===----------------------------------------------------------------------===// -/// ConstantBool - Boolean Values -/// -class ConstantBool : public ConstantIntegral { - ConstantBool(bool V); -public: - static ConstantBool *True, *False; // The True & False values - /// get() - Static factory methods - Return objects of the specified value - static ConstantBool *get(bool Value) { return Value ? True : False; } - static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); } - - /// inverted - Return the opposite value of the current value. - inline ConstantBool *inverted() const { return (this==True) ? False : True; } - - /// getValue - return the boolean value of this constant. - /// - inline bool getValue() const { return static_cast(getRawValue()); } - - /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. - /// - virtual bool isNullValue() const { return this == False; } - virtual bool isMaxValue() const { return this == True; } - virtual bool isMinValue() const { return this == False; } - virtual bool isAllOnesValue() const { return this == True; } - - /// Methods for 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; + /// 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(uint64_t V) const { + return Val == V; } -}; - -//===----------------------------------------------------------------------===// -/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing -/// with integral constants easier. -/// -class ConstantInt : public ConstantIntegral { -protected: - ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT - ConstantInt(const Type *Ty, ValueTy VT, uint64_t V); -public: - /// equalsInt - Provide 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. - /// - bool equalsInt(unsigned char V) const { - assert(V <= 127 && - "equalsInt: Can only be used with very small positive constants!"); - return Val.Unsigned == V; + /// getTrue/getFalse - Return the singleton true/false values. + static inline ConstantInt *getTrue() { + if (TheTrueVal) return TheTrueVal; + return CreateTrueFalseVals(true); } - - /// ConstantInt::get static method: return a ConstantInt with the specified - /// value. as above, we work only with very small values here. - /// - static ConstantInt *get(const Type *Ty, unsigned char V); - - /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. - virtual bool isNullValue() const { return Val.Unsigned == 0; } - virtual bool isMaxValue() const = 0; - virtual bool isMinValue() const = 0; - - /// Methods for 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() == ConstantSIntVal || - V->getValueType() == ConstantUIntVal; + static inline ConstantInt *getFalse() { + 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 an unsigned APInt. Accessing it with + /// either getSExtValue() or getZExtValue() will yield a correctly sized and + /// signed value for the type Ty. + /// @brief Get a ConstantInt for a specific value. + static ConstantInt *get(const Type *Ty, uint64_t V, bool isSigned = false); -//===----------------------------------------------------------------------===// -/// ConstantSInt - Signed Integer Values [sbyte, short, int, long] -/// -class ConstantSInt : public ConstantInt { - ConstantSInt(const ConstantSInt &); // DO NOT IMPLEMENT - friend struct ConstantCreator; + /// Return a ConstantInt with the specified value and an implied Type. The + /// type is the integer type that corresponds to the bit width of the value. + static ConstantInt *get(const APInt &V); -protected: - ConstantSInt(const Type *Ty, int64_t V); -public: - /// get() - Static factory methods - Return objects of the specified value + /// getType - Specialize the getType() method to always return an IntegerType, + /// which reduces the amount of casting needed in parts of the compiler. /// - static ConstantSInt *get(const Type *Ty, int64_t V); + inline const IntegerType *getType() const { + return reinterpret_cast(Value::getType()); + } - /// isValueValidForType - return true if Ty is big enough to represent 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. Note that there are two + /// versions of this method, one for unsigned and one for signed integers. + /// Although ConstantInt canonicalizes everything to an unsigned integer, + /// the signed version avoids callers having to convert a signed quantity + /// to the appropriate unsigned type before calling the method. + /// @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, uint64_t V); static bool isValueValidForType(const Type *Ty, int64_t V); - /// getValue - return the underlying value of this constant. - /// - inline int64_t getValue() const { return Val.Signed; } + /// This function will return true iff this constant represents the "null" + /// value that would be returned by the getNullValue method. + /// @returns true if this is the null integer value. + /// @brief Determine if the value is null. + virtual bool isNullValue() const { + return Val == 0; + } - virtual bool isAllOnesValue() const { return getValue() == -1; } + /// 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; + } - /// isMaxValue - Return true if this is the largest value that may be - /// represented by this type. - /// - virtual bool isMaxValue() const { - int64_t V = getValue(); - if (V < 0) return false; // Be careful about wrap-around on 'long's - ++V; - return !isValueValidForType(getType(), V) || V < 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; } - /// isMinValue - Return true if this is the smallest value that may be - /// represented by this type. - /// - virtual bool isMinValue() const { - int64_t V = getValue(); - if (V > 0) return false; // Be careful about wrap-around on 'long's - --V; - return !isValueValidForType(getType(), V) || V > 0; + /// 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 Val.isAllOnesValue(); } - /// Methods for support type inquiry through isa, cast, and dyn_cast: - /// - static inline bool classof(const ConstantSInt *) { return true; } - static bool classof(const Value *V) { - return V->getValueType() == ConstantSIntVal; + /// This function will return true iff this constant represents the largest + /// value that may be represented by the constant's type. + /// @returns true iff this is the largest value that may be represented + /// by this type. + /// @brief Determine if the value is maximal. + bool isMaxValue(bool isSigned) const { + if (isSigned) + return Val.isMaxSignedValue(); + else + return Val.isMaxValue(); } -}; -//===----------------------------------------------------------------------===// -/// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong] -/// -class ConstantUInt : public ConstantInt { - ConstantUInt(const ConstantUInt &); // DO NOT IMPLEMENT - friend struct ConstantCreator; -protected: - ConstantUInt(const Type *Ty, uint64_t V); -public: - /// get() - Static factory methods - Return objects of the specified value - /// - static ConstantUInt *get(const Type *Ty, uint64_t V); + /// This function will return true iff this constant represents the smallest + /// value that may be represented by this constant's type. + /// @returns true if this is the smallest value that may be represented by + /// this type. + /// @brief Determine if the value is minimal. + bool isMinValue(bool isSigned) const { + if (isSigned) + return Val.isMinSignedValue(); + else + return Val.isMinValue(); + } - /// isValueValidForType - return true if Ty is big enough to represent V. - /// - static bool isValueValidForType(const Type *Ty, uint64_t V); + /// 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; + } - /// getValue - return the underlying value of this constant. - /// - inline uint64_t getValue() const { return Val.Unsigned; } + /// @returns the 64-bit value of this constant if its active bits number is + /// not greater than 64, otherwise, just return the given uint64_t number. + /// @brief Get the constant's value if possible. + uint64_t getLimitedValue(uint64_t Limit = ~0ULL) const { + return Val.getLimitedValue(Limit); + } - /// isMaxValue - Return true if this is the largest value that may be - /// represented by this type. - /// - virtual bool isAllOnesValue() const; - virtual bool isMaxValue() const { return isAllOnesValue(); } - virtual bool isMinValue() const { return getValue() == 0; } + /// @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); - /// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const ConstantUInt *) { return true; } + /// @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() == ConstantUIntVal; + return V->getValueID() == ConstantIntVal; } + static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; } +private: + static ConstantInt *CreateTrueFalseVals(bool WhichOne); }; @@ -271,35 +214,46 @@ public: /// ConstantFP - Floating Point Values [float, double] /// class ConstantFP : public Constant { - double Val; - friend struct ConstantCreator; - friend struct ConstantCreator; + APFloat Val; ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT protected: - ConstantFP(const Type *Ty, double V); + ConstantFP(const Type *Ty, const APFloat& V); public: /// get() - Static factory methods - Return objects of the specified value - static ConstantFP *get(const Type *Ty, double V); + static ConstantFP *get(const Type *Ty, const APFloat& 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; + // Get a negative zero. + static ConstantFP *getNegativeZero(const Type* Ty); + /// 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 constants. + bool isExactlyValue(const APFloat& V) const; + + bool isExactlyValue(double V) const { + if (&Val.getSemantics() == &APFloat::IEEEdouble) + return isExactlyValue(APFloat(V)); + else if (&Val.getSemantics() == &APFloat::IEEEsingle) + return isExactlyValue(APFloat((float)V)); + assert(0); + return false; + } /// 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; } }; @@ -310,7 +264,7 @@ class ConstantAggregateZero : public Constant { friend struct ConstantCreator; ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT protected: - ConstantAggregateZero(const Type *Ty) + explicit ConstantAggregateZero(const Type *Ty) : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {} public: /// get() - static factory method for creating a null aggregate. It is @@ -327,7 +281,7 @@ public: /// static bool classof(const ConstantAggregateZero *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantAggregateZeroVal; + return V->getValueID() == ConstantAggregateZeroVal; } }; @@ -345,7 +299,19 @@ protected: public: /// get() - Static factory methods - Return objects of the specified value static Constant *get(const ArrayType *T, const std::vector &); - static Constant *get(const std::string &Initializer, unsigned len = 0); + static Constant *get(const ArrayType *T, + Constant*const*Vals, unsigned NumVals) { + // FIXME: make this the primary ctor method. + return get(T, std::vector(Vals, Vals+NumVals)); + } + + /// 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. @@ -358,6 +324,13 @@ public: /// ubyte, and if 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; + /// getAsString - If this array is isString(), then this method converts the /// array to an std::string and returns it. Otherwise, it asserts out. /// @@ -374,7 +347,7 @@ 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; } }; @@ -393,8 +366,13 @@ 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); - + static Constant *get(const std::vector &V, bool Packed = false); + static Constant *get(Constant*const* Vals, unsigned NumVals, + bool Packed = false) { + // FIXME: make this the primary ctor method. + return get(std::vector(Vals, Vals+NumVals), Packed); + } + /// getType() specialization - Reduce amount of casting... /// inline const StructType *getType() const { @@ -414,44 +392,63 @@ 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; } }; //===----------------------------------------------------------------------===// -/// 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); + ~ConstantVector(); public: /// get() - Static factory methods - Return objects of the specified value - static Constant *get(const PackedType *T, const std::vector &); + static Constant *get(const VectorType *T, const std::vector &); static Constant *get(const std::vector &V); - - /// getType - Specialize the getType() method to always return an PackedType, + static Constant *get(Constant*const* Vals, unsigned NumVals) { + // FIXME: make this the primary ctor method. + return get(std::vector(Vals, Vals+NumVals)); + } + + /// 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 a vector integer constant of the given type that + /// has all its bits set to true. + /// @brief Get the all ones value + static ConstantVector *getAllOnesValue(const VectorType *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; } }; @@ -462,7 +459,7 @@ class ConstantPointerNull : public Constant { friend struct ConstantCreator; ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT protected: - ConstantPointerNull(const PointerType *T) + explicit ConstantPointerNull(const PointerType *T) : Constant(reinterpret_cast(T), Value::ConstantPointerNullVal, 0, 0) {} @@ -487,7 +484,7 @@ 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; } }; @@ -514,12 +511,12 @@ protected: // 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 *getCompareTy(unsigned short pred, 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, @@ -535,9 +532,69 @@ public: /// 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); + static Constant *getTrunc (Constant *C, const Type *Ty); + static Constant *getSExt (Constant *C, const Type *Ty); + static Constant *getZExt (Constant *C, const Type *Ty); + static Constant *getFPTrunc (Constant *C, const Type *Ty); + static Constant *getFPExtend(Constant *C, const Type *Ty); + static Constant *getUIToFP (Constant *C, const Type *Ty); + static Constant *getSIToFP (Constant *C, const Type *Ty); + static Constant *getFPToUI (Constant *C, const Type *Ty); + static Constant *getFPToSI (Constant *C, const Type *Ty); + static Constant *getPtrToInt(Constant *C, const Type *Ty); + static Constant *getIntToPtr(Constant *C, const Type *Ty); + static Constant *getBitCast (Constant *C, const Type *Ty); + + // @brief Convenience function for getting one of the casting operations + // using a CastOps opcode. + static Constant *getCast( + unsigned ops, ///< The opcode for the conversion + Constant *C, ///< The constant to be converted + const Type *Ty ///< The type to which the constant is converted + ); + + // @brief Create a ZExt or BitCast cast constant expression + static Constant *getZExtOrBitCast( + Constant *C, ///< The constant to zext or bitcast + const Type *Ty ///< The type to zext or bitcast C to + ); + + // @brief Create a SExt or BitCast cast constant expression + static Constant *getSExtOrBitCast( + Constant *C, ///< The constant to sext or bitcast + const Type *Ty ///< The type to sext or bitcast C to + ); + + // @brief Create a Trunc or BitCast cast constant expression + static Constant *getTruncOrBitCast( + Constant *C, ///< The constant to trunc or bitcast + const Type *Ty ///< The type to trunc or bitcast C to + ); + + /// @brief Create a BitCast or a PtrToInt cast constant expression + static Constant *getPointerCast( + Constant *C, ///< The pointer value to be casted (operand 0) + const Type *Ty ///< The type to which cast should be made + ); + + /// @brief Create a ZExt, Bitcast or Trunc for integer -> integer casts + static Constant *getIntegerCast( + Constant *C, ///< The integer constant to be casted + const Type *Ty, ///< The integer type to cast to + bool isSigned ///< Whether C should be treated as signed or not + ); + + /// @brief Create a FPExt, Bitcast or FPTrunc for fp -> fp casts + static Constant *getFPCast( + Constant *C, ///< The integer constant to be casted + const Type *Ty ///< The integer type to cast to + ); + + /// @brief Return true if this is a convert constant expression + bool isCast() const; + + /// @brief Return true if this is a compare constant expression + bool isCompare() const; /// Select constant expr /// @@ -546,20 +603,18 @@ public: } /// getSizeOf constant expr - computes the size of a type in a target - /// independent way (Note: the return type is ULong but the object is not - /// necessarily a ConstantUInt). + /// independent way (Note: the return type is an i64). /// 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); + /// @brief Return an ICmp or FCmp comparison operator constant expression. + static Constant *getCompare(unsigned short pred, Constant *C1, Constant *C2); + /// ConstantExpr::get* - Return some common constants without having to /// specify the full Instruction::OPCODE identifier. /// @@ -568,35 +623,38 @@ public: 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 *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 *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 *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 *getShr(Constant *C1, Constant *C2); - - static Constant *getUShr(Constant *C1, Constant *C2); // unsigned shr - static Constant *getSShr(Constant *C1, Constant *C2); // signed shr + static Constant *getLShr(Constant *C1, Constant *C2); + static Constant *getAShr(Constant *C1, Constant *C2); /// 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); - + + /// Floating point negation must be implemented with f(x) = -0.0 - x. This + /// method returns the negative zero constant for floating point or vector + /// floating point types; for all other types, it returns the null value. + static Constant *getZeroValueForNegationExpr(const Type *Ty); + /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. virtual bool isNullValue() const { return false; } @@ -604,9 +662,22 @@ public: /// getOpcode - Return the opcode at the root of this constant expression unsigned getOpcode() const { return SubclassData; } + /// getPredicate - Return the ICMP or FCMP predicate value. Assert if this is + /// not an ICMP or FCMP constant expression. + unsigned getPredicate() const; + /// 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 &Ops) const; + virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); @@ -622,7 +693,7 @@ public: /// 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; } }; @@ -637,7 +708,7 @@ class UndefValue : public Constant { friend struct ConstantCreator; 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) {} public: /// get() - Static factory methods - Return an 'undef' object of the specified /// type. @@ -653,7 +724,7 @@ 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; } };