diff options
Diffstat (limited to 'include/llvm/Constants.h')
| -rw-r--r-- | include/llvm/Constants.h | 358 |
1 files changed, 152 insertions, 206 deletions
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index da69d25..7715286 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -45,7 +45,6 @@ struct ConvertConstantType; /// represents both boolean and integral constants. /// @brief Class for constant integers. class ConstantInt : public Constant { - static ConstantInt *TheTrueVal, *TheFalseVal; void *operator new(size_t, unsigned); // DO NOT IMPLEMENT ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT ConstantInt(const IntegerType *Ty, const APInt& V); @@ -56,10 +55,47 @@ protected: return User::operator new(s, 0); } public: + static ConstantInt *getTrue(LLVMContext &Context); + static ConstantInt *getFalse(LLVMContext &Context); + + /// If Ty is a vector type, return a Constant with a splat of the given + /// value. Otherwise return a ConstantInt for the given value. + static Constant *get(const Type *Ty, uint64_t V, bool isSigned = false); + + /// Return a ConstantInt with the specified integer value for the specified + /// type. If the type is wider than 64 bits, the value will be zero-extended + /// to fit the type, unless isSigned is true, in which case the value will + /// be interpreted as a 64-bit signed integer and sign-extended to fit + /// the type. + /// @brief Get a ConstantInt for a specific value. + static ConstantInt *get(const IntegerType *Ty, uint64_t V, + bool isSigned = 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 signed value. + static ConstantInt *getSigned(const IntegerType *Ty, int64_t V); + static Constant *getSigned(const Type *Ty, int64_t V); + + /// 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(LLVMContext &Context, const APInt &V); + + /// Return a ConstantInt constructed from the string strStart with the given + /// radix. + static ConstantInt *get(const IntegerType *Ty, const StringRef &Str, + uint8_t radix); + + /// If Ty is a vector type, return a Constant with a splat of the given + /// value. Otherwise return a ConstantInt for the given value. + static Constant *get(const Type* Ty, const APInt& V); + /// 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 { + inline const APInt &getValue() const { return Val; } @@ -92,49 +128,6 @@ public: return Val == V; } - /// getTrue/getFalse - Return the singleton true/false values. - static inline ConstantInt *getTrue() { - if (TheTrueVal) return TheTrueVal; - return CreateTrueFalseVals(true); - } - static inline ConstantInt *getFalse() { - if (TheFalseVal) return TheFalseVal; - return CreateTrueFalseVals(false); - } - - /// Return a ConstantInt with the specified integer value for the specified - /// type. If the type is wider than 64 bits, the value will be zero-extended - /// to fit the type, unless isSigned is true, in which case the value will - /// be interpreted as a 64-bit signed integer and sign-extended to fit - /// the type. - /// @brief Get a ConstantInt for a specific value. - static ConstantInt *get(const IntegerType *Ty, - uint64_t V, bool isSigned = false); - - /// If Ty is a vector type, return a Constant with a splat of the given - /// value. Otherwise return a ConstantInt for the given value. - static Constant *get(const Type *Ty, uint64_t V, bool isSigned = 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 signed value. - static ConstantInt *getSigned(const IntegerType *Ty, int64_t V) { - return get(Ty, V, true); - } - static Constant *getSigned(const Type *Ty, int64_t V) { - return get(Ty, V, true); - } - - /// 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); - - /// If Ty is a vector type, return a Constant with a splat of the given - /// value. Otherwise return a ConstantInt for the given value. - static Constant *get(const Type *Ty, 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. /// @@ -227,19 +220,11 @@ public: 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 - static ConstantInt *getAllOnesValue(const Type *Ty); - /// @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->getValueID() == ConstantIntVal; } - static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; } -private: - static ConstantInt *CreateTrueFalseVals(bool WhichOne); }; @@ -250,6 +235,7 @@ class ConstantFP : public Constant { APFloat Val; void *operator new(size_t, unsigned);// DO NOT IMPLEMENT ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT + friend class LLVMContextImpl; protected: ConstantFP(const Type *Ty, const APFloat& V); protected: @@ -258,26 +244,35 @@ protected: return User::operator new(s, 0); } public: - /// get() - Static factory methods - Return objects of the specified value - static ConstantFP *get(const APFloat &V); - + /// 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 *getZeroValueForNegation(const Type *Ty); + /// get() - This returns a ConstantFP, or a vector containing a splat of a /// ConstantFP, for the specified value in the specified type. This should /// only be used for simple constant values like 2.0/1.0 etc, that are /// known-valid both as host double and as the target format. - static Constant *get(const Type *Ty, double V); - + static Constant *get(const Type* Ty, double V); + static Constant *get(const Type* Ty, const StringRef &Str); + static ConstantFP *get(LLVMContext &Context, const APFloat &V); + static ConstantFP *getNegativeZero(const Type* Ty); + static ConstantFP *getInfinity(const Type *Ty, bool Negative = false); + /// isValueValidForType - return true if Ty is big enough to represent V. - static bool isValueValidForType(const Type *Ty, const APFloat& V); + 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); + + /// isNegativeZeroValue - Return true if the value is what would be returned + /// by getZeroValueForNegation. + virtual bool isNegativeZeroValue() const { + return Val.isZero() && Val.isNegative(); + } /// isExactlyValue - We don't rely on operator== working on double values, as /// it returns true for things that are clearly not equal, like -0.0 and 0.0. @@ -285,7 +280,7 @@ public: /// two floating point values. The version with a double operand is retained /// because it's so convenient to write isExactlyValue(2.0), but please use /// it only for simple constants. - bool isExactlyValue(const APFloat& V) const; + bool isExactlyValue(const APFloat &V) const; bool isExactlyValue(double V) const { bool ignored; @@ -319,10 +314,8 @@ protected: return User::operator new(s, 0); } public: - /// get() - static factory method for creating a null aggregate. It is - /// illegal to call this method with a non-aggregate type. - static ConstantAggregateZero *get(const Type *Ty); - + static ConstantAggregateZero* get(const Type *Ty); + /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. virtual bool isNullValue() const { return true; } @@ -348,22 +341,20 @@ class ConstantArray : public Constant { protected: ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val); public: - /// get() - Static factory methods - Return objects of the specified value - static Constant *get(const ArrayType *T, const std::vector<Constant*> &); - static Constant *get(const ArrayType *T, - Constant*const*Vals, unsigned NumVals) { - // FIXME: make this the primary ctor method. - return get(T, std::vector<Constant*>(Vals, Vals+NumVals)); - } - + // ConstantArray accessors + static Constant *get(const ArrayType *T, const std::vector<Constant*> &V); + static Constant *get(const ArrayType *T, Constant *const *Vals, + unsigned 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); - + /// null termination. + static Constant *get(LLVMContext &Context, const StringRef &Initializer, + bool AddNull = true); + /// Transparently provide more efficient getOperand methods. DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); @@ -406,7 +397,7 @@ public: }; template <> -struct OperandTraits<ConstantArray> : VariadicOperandTraits<> { +struct OperandTraits<ConstantArray> : public VariadicOperandTraits<> { }; DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantArray, Constant) @@ -421,16 +412,13 @@ class ConstantStruct : public Constant { protected: ConstantStruct(const StructType *T, const std::vector<Constant*> &Val); public: - /// get() - Static factory methods - Return objects of the specified value - /// + // ConstantStruct accessors static Constant *get(const StructType *T, const std::vector<Constant*> &V); - static Constant *get(const std::vector<Constant*> &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<Constant*>(Vals, Vals+NumVals), Packed); - } - + static Constant *get(LLVMContext &Context, + const std::vector<Constant*> &V, bool Packed); + static Constant *get(LLVMContext &Context, + Constant *const *Vals, unsigned NumVals, bool Packed); + /// Transparently provide more efficient getOperand methods. DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); @@ -458,7 +446,7 @@ public: }; template <> -struct OperandTraits<ConstantStruct> : VariadicOperandTraits<> { +struct OperandTraits<ConstantStruct> : public VariadicOperandTraits<> { }; DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant) @@ -473,13 +461,10 @@ class ConstantVector : public Constant { protected: ConstantVector(const VectorType *T, const std::vector<Constant*> &Val); public: - /// get() - Static factory methods - Return objects of the specified value - static Constant *get(const VectorType *T, const std::vector<Constant*> &); + // ConstantVector accessors + static Constant *get(const VectorType *T, const std::vector<Constant*> &V); static Constant *get(const std::vector<Constant*> &V); - static Constant *get(Constant*const* Vals, unsigned NumVals) { - // FIXME: make this the primary ctor method. - return get(std::vector<Constant*>(Vals, Vals+NumVals)); - } + static Constant *get(Constant *const *Vals, unsigned NumVals); /// Transparently provide more efficient getOperand methods. DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); @@ -490,11 +475,6 @@ public: inline const VectorType *getType() const { return reinterpret_cast<const VectorType*>(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 vectors are always @@ -522,7 +502,7 @@ public: }; template <> -struct OperandTraits<ConstantVector> : VariadicOperandTraits<> { +struct OperandTraits<ConstantVector> : public VariadicOperandTraits<> { }; DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantVector, Constant) @@ -590,13 +570,17 @@ protected: // 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); + Constant *C1, Constant *C2, + unsigned Flags = 0); 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, Value* const *Idxs, unsigned NumIdxs); + static Constant *getInBoundsGetElementPtrTy(const Type *Ty, Constant *C, + Value* const *Idxs, + unsigned NumIdxs); static Constant *getExtractElementTy(const Type *Ty, Constant *Val, Constant *Idx); static Constant *getInsertElementTy(const Type *Ty, Constant *Val, @@ -617,6 +601,43 @@ public: /// Cast constant expr /// + + /// getAlignOf constant expr - computes the alignment of a type in a target + /// independent way (Note: the return type is an i32; Note: assumes that i8 + /// is byte aligned). + static Constant *getAlignOf(const Type* Ty); + + /// getSizeOf constant expr - computes the size of a type in a target + /// independent way (Note: the return type is an i64). + /// + static Constant *getSizeOf(const Type* Ty); + + /// getOffsetOf constant expr - computes the offset of a field in a target + /// independent way (Note: the return type is an i64). + /// + static Constant *getOffsetOf(const StructType* Ty, unsigned FieldNo); + + static Constant *getNeg(Constant *C); + static Constant *getFNeg(Constant *C); + static Constant *getNot(Constant *C); + static Constant *getAdd(Constant *C1, Constant *C2); + static Constant *getFAdd(Constant *C1, Constant *C2); + static Constant *getSub(Constant *C1, Constant *C2); + static Constant *getFSub(Constant *C1, Constant *C2); + static Constant *getMul(Constant *C1, Constant *C2); + static Constant *getFMul(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); + static Constant *getSRem(Constant *C1, Constant *C2); + 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 *getShl(Constant *C1, Constant *C2); + static Constant *getLShr(Constant *C1, Constant *C2); + static Constant *getAShr(Constant *C1, Constant *C2); static Constant *getTrunc (Constant *C, const Type *Ty); static Constant *getSExt (Constant *C, const Type *Ty); static Constant *getZExt (Constant *C, const Type *Ty); @@ -630,6 +651,10 @@ public: static Constant *getIntToPtr(Constant *C, const Type *Ty); static Constant *getBitCast (Constant *C, const Type *Ty); + static Constant *getNSWAdd(Constant *C1, Constant *C2); + static Constant *getNSWSub(Constant *C1, Constant *C2); + static Constant *getExactSDiv(Constant *C1, Constant *C2); + /// Transparently provide more efficient getOperand methods. DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant); @@ -688,69 +713,51 @@ public: /// and the getIndices() method may be used. bool hasIndices() const; + /// @brief Return true if this is a getelementptr expression and all + /// the index operands are compile-time known integers within the + /// corresponding notional static array extents. Note that this is + /// not equivalant to, a subset of, or a superset of the "inbounds" + /// property. + bool isGEPWithNoNotionalOverIndexing() const; + /// Select constant expr /// static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) { return getSelectTy(V1->getType(), C, V1, V2); } - /// getAlignOf constant expr - computes the alignment of a type in a target - /// independent way (Note: the return type is an i32; Note: assumes that i8 - /// is byte aligned). - /// - static Constant *getAlignOf(const Type *Ty); - - /// getSizeOf constant expr - computes the size of a type in a target - /// independent way (Note: the return type is an i64). - /// - static Constant *getSizeOf(const Type *Ty); - - /// ConstantExpr::get - Return a binary or shift operator constant expression, + /// get - Return a binary or shift operator constant expression, /// folding if possible. /// - static Constant *get(unsigned Opcode, Constant *C1, Constant *C2); + static Constant *get(unsigned Opcode, Constant *C1, Constant *C2, + unsigned Flags = 0); - /// @brief Return an ICmp, FCmp, VICmp, or VFCmp comparison operator constant - /// expression. + /// @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 + /// get* - Return some common constants without having to /// specify the full Instruction::OPCODE identifier. /// - static Constant *getNeg(Constant *C); - static Constant *getFNeg(Constant *C); - static Constant *getNot(Constant *C); - static Constant *getAdd(Constant *C1, Constant *C2); - static Constant *getFAdd(Constant *C1, Constant *C2); - static Constant *getSub(Constant *C1, Constant *C2); - static Constant *getFSub(Constant *C1, Constant *C2); - static Constant *getMul(Constant *C1, Constant *C2); - static Constant *getFMul(Constant *C1, Constant *C2); - static Constant *getUDiv(Constant *C1, Constant *C2); - static Constant *getSDiv(Constant *C1, Constant *C2); - static Constant *getFDiv(Constant *C1, Constant *C2); - static Constant *getURem(Constant *C1, Constant *C2); // unsigned rem - static Constant *getSRem(Constant *C1, Constant *C2); // signed rem - static Constant *getFRem(Constant *C1, Constant *C2); - static Constant *getAnd(Constant *C1, Constant *C2); - static Constant *getOr(Constant *C1, Constant *C2); - static Constant *getXor(Constant *C1, Constant *C2); static Constant *getICmp(unsigned short pred, Constant *LHS, Constant *RHS); static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS); - static Constant *getVICmp(unsigned short pred, Constant *LHS, Constant *RHS); - static Constant *getVFCmp(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); /// Getelementptr form. std::vector<Value*> is only accepted for convenience: /// all elements must be Constant's. /// static Constant *getGetElementPtr(Constant *C, - Constant* const *IdxList, unsigned NumIdx); + Constant *const *IdxList, unsigned NumIdx); static Constant *getGetElementPtr(Constant *C, Value* const *IdxList, unsigned NumIdx); - + + /// Create an "inbounds" getelementptr. See the documentation for the + /// "inbounds" flag in LangRef.html for details. + static Constant *getInBoundsGetElementPtr(Constant *C, + Constant *const *IdxList, + unsigned NumIdx); + static Constant *getInBoundsGetElementPtr(Constant *C, + 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); @@ -759,11 +766,6 @@ public: static Constant *getInsertValue(Constant *Agg, Constant *Val, const unsigned *IdxList, unsigned NumIdx); - /// 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; } @@ -792,7 +794,7 @@ public: Constant *getWithOperands(const std::vector<Constant*> &Ops) const { return getWithOperands(&Ops[0], (unsigned)Ops.size()); } - Constant *getWithOperands(Constant* const *Ops, unsigned NumOps) const; + Constant *getWithOperands(Constant *const *Ops, unsigned NumOps) const; virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); @@ -805,7 +807,7 @@ public: }; template <> -struct OperandTraits<ConstantExpr> : VariadicOperandTraits<1> { +struct OperandTraits<ConstantExpr> : public VariadicOperandTraits<1> { }; DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant) @@ -845,62 +847,6 @@ public: return V->getValueID() == UndefValueVal; } }; - -//===----------------------------------------------------------------------===// -/// MDString - a single uniqued string. -/// These are used to efficiently contain a byte sequence for metadata. -/// -class MDString : public Constant { - MDString(const MDString &); // DO NOT IMPLEMENT - void *operator new(size_t, unsigned); // DO NOT IMPLEMENT - MDString(const char *begin, const char *end); - - const char *StrBegin, *StrEnd; -protected: - // allocate space for exactly zero operands - void *operator new(size_t s) { - return User::operator new(s, 0); - } -public: - /// get() - Static factory methods - Return objects of the specified value. - /// - static MDString *get(const char *StrBegin, const char *StrEnd); - static MDString *get(const std::string &Str); - - /// size() - The length of this string. - /// - intptr_t size() const { return StrEnd - StrBegin; } - - /// begin() - Pointer to the first byte of the string. - /// - const char *begin() const { return StrBegin; } - - /// end() - Pointer to one byte past the end of the string. - /// - const char *end() const { return StrEnd; } - - /// getType() specialization - Type is always MetadataTy. - /// - inline const Type *getType() const { - return Type::MetadataTy; - } - - /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. This always returns false because getNullValue will never - /// produce metadata. - virtual bool isNullValue() const { - return false; - } - - virtual void destroyConstant(); - - /// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const MDString *) { return true; } - static bool classof(const Value *V) { - return V->getValueID() == MDStringVal; - } -}; - } // End llvm namespace #endif |
