X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FConstants.h;h=c69bad4b3be90ee31d648ccf2cb313494d22ea13;hb=fc82fabe00b0b820e3c0d7fc9e289bace0295f11;hp=dd8343d6b3820ec924126511937d029a3d24d8b4;hpb=f57fc81faebf3eb81fb30fe17c4295d46060e03f;p=oota-llvm.git diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index dd8343d6b38..c69bad4b3be 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -2,8 +2,8 @@ // // 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. // //===----------------------------------------------------------------------===// // @@ -23,6 +23,7 @@ #include "llvm/Constant.h" #include "llvm/Type.h" #include "llvm/ADT/APInt.h" +#include "llvm/ADT/APFloat.h" namespace llvm { @@ -52,6 +53,9 @@ public: 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. Note @@ -90,12 +94,11 @@ public: } /// 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. + /// 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, int64_t V); - static ConstantInt *get(const Type *Ty, const APInt& V); + static ConstantInt *get(const Type *Ty, uint64_t V, bool isSigned = false); /// 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. @@ -128,6 +131,21 @@ 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. @@ -160,6 +178,22 @@ public: return Val.isMinValue(); } + /// 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; + } + + /// @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); + } + /// @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 @@ -168,7 +202,7 @@ public: /// @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: @@ -180,33 +214,46 @@ private: /// ConstantFP - Floating Point Values [float, double] /// class ConstantFP : public Constant { - double Val; + 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; } }; @@ -217,7 +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 @@ -234,7 +281,7 @@ public: /// static bool classof(const ConstantAggregateZero *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantAggregateZeroVal; + return V->getValueID() == ConstantAggregateZeroVal; } }; @@ -278,7 +325,9 @@ public: 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; @@ -298,7 +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; } }; @@ -343,7 +392,7 @@ 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; } }; @@ -366,36 +415,40 @@ public: return get(std::vector(Vals, Vals+NumVals)); } - /// getType - Specialize the getType() method to always return an VectorType, + /// getType - Specialize the getType() method to always return a VectorType, /// which reduces the amount of casting needed in parts of the compiler. /// inline const VectorType *getType() const { return reinterpret_cast(Value::getType()); } - /// @returns the value for an packed integer constant of the given type that + /// @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 packed constant + /// 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 ConstantVector *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantVectorVal; + return V->getValueID() == ConstantVectorVal; } }; @@ -406,7 +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) {} @@ -431,7 +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; } }; @@ -550,7 +603,7 @@ public: } /// getSizeOf constant expr - computes the size of a type in a target - /// independent way (Note: the return type is a ULong). + /// independent way (Note: the return type is an i64). /// static Constant *getSizeOf(const Type *Ty); @@ -579,8 +632,8 @@ public: 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 *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); @@ -598,7 +651,7 @@ public: 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 packed + /// 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); @@ -640,7 +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; } }; @@ -655,7 +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. @@ -671,7 +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; } };