X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FConstants.h;h=2bec1d42ab63b47c59e640758edb74f780288959;hb=a727d5502c8e23c090da658bf14c5ebc1169a070;hp=c92229e87937cf5c86b4fc5fa1626305a8513a17;hpb=24d6da5fedcf39891f7d8c5b031c01324b3db545;p=oota-llvm.git diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index c92229e8793..2bec1d42ab6 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -22,13 +22,14 @@ #include "llvm/Constant.h" #include "llvm/Type.h" +#include "llvm/ADT/APInt.h" namespace llvm { class ArrayType; class StructType; class PointerType; -class PackedType; +class VectorType; template struct ConstantCreator; @@ -40,57 +41,67 @@ struct ConvertConstantType; /// represents both boolean and integral constants. /// @brief Class for constant integers. class ConstantInt : public Constant { -protected: - uint64_t Val; -protected: + static ConstantInt *TheTrueVal, *TheFalseVal; 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; 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. + /// 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 = Value::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. + /// 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, 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. + static ConstantInt *get(const APInt &V); /// getType - Specialize the getType() method to always return an IntegerType, /// which reduces the amount of casting needed in parts of the compiler. @@ -119,12 +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 @@ -133,13 +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(Value::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 @@ -148,13 +171,26 @@ 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(Value::getType(), V) || V > 0; - } - return getZExtValue() == 0; + if (isSigned) + return Val.isMinSignedValue(); + else + 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 @@ -165,8 +201,11 @@ 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: + static ConstantInt *CreateTrueFalseVals(bool WhichOne); }; @@ -175,8 +214,6 @@ public: /// class ConstantFP : public Constant { double Val; - friend struct ConstantCreator; - friend struct ConstantCreator; ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT protected: ConstantFP(const Type *Ty, double V); @@ -202,7 +239,7 @@ public: /// 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; } }; @@ -213,7 +250,7 @@ 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 @@ -230,7 +267,7 @@ public: /// static bool classof(const ConstantAggregateZero *) { return true; } static bool classof(const Value *V) { - return V->getValueType() == ConstantAggregateZeroVal; + return V->getValueID() == ConstantAggregateZeroVal; } }; @@ -248,6 +285,11 @@ 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 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 @@ -289,7 +331,7 @@ 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; } }; @@ -308,8 +350,13 @@ 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, bool packed = false); - + 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 { @@ -329,36 +376,40 @@ 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 an 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); + 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 @@ -375,9 +426,9 @@ public: 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; } }; @@ -388,7 +439,7 @@ 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) {} @@ -413,7 +464,7 @@ 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; } }; @@ -442,12 +493,10 @@ protected: Constant *C1, Constant *C2); 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, @@ -538,10 +587,6 @@ public: /// 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. /// @@ -577,10 +622,10 @@ public: /// 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); @@ -628,7 +673,7 @@ 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; } }; @@ -643,7 +688,7 @@ 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. @@ -659,7 +704,7 @@ 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; } };