mirror of
https://github.com/c64scene-ar/llvm-6502.git
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5133a5cf2e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8852 91177308-0d34-0410-b5e6-96231b3b80d8
572 lines
21 KiB
C++
572 lines
21 KiB
C++
//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===//
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//
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// This file contains the declarations for the subclasses of Constant, which
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// represent the different type of constant pool values
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CONSTANTS_H
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#define LLVM_CONSTANTS_H
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#include "llvm/Constant.h"
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#include "Support/DataTypes.h"
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class ArrayType;
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class StructType;
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class PointerType;
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template<class ConstantClass, class TypeClass, class ValType>
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struct ConstantCreator;
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template<class ConstantClass, class TypeClass>
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struct ConvertConstantType;
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//===---------------------------------------------------------------------------
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/// ConstantIntegral - Shared superclass of boolean and integer constants.
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///
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/// This class just defines some common interfaces to be implemented.
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///
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class ConstantIntegral : public Constant {
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protected:
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ConstantIntegral(const Type *Ty) : Constant(Ty) {}
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public:
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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///
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virtual bool isNullValue() const = 0;
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isMaxValue() const = 0;
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/// isMinValue - Return true if this is the smallest value that may be
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/// represented by this type.
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///
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virtual bool isMinValue() const = 0;
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/// isAllOnesValue - Return true if every bit in this constant is set to true.
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///
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virtual bool isAllOnesValue() const = 0;
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/// Static constructor to get the maximum/minimum/allones constant of
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/// specified (integral) type...
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///
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static ConstantIntegral *getMaxValue(const Type *Ty);
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static ConstantIntegral *getMinValue(const Type *Ty);
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static ConstantIntegral *getAllOnesValue(const Type *Ty);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantIntegral *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantBool - Boolean Values
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///
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class ConstantBool : public ConstantIntegral {
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bool Val;
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ConstantBool(bool V);
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public:
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static ConstantBool *True, *False; // The True & False values
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantBool *get(bool Value) { return Value ? True : False; }
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static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); }
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/// inverted - Return the opposite value of the current value.
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inline ConstantBool *inverted() const { return (this==True) ? False : True; }
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/// getValue - return the boolean value of this constant.
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///
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inline bool getValue() const { return Val; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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///
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virtual bool isNullValue() const { return this == False; }
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virtual bool isMaxValue() const { return this == True; }
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virtual bool isMinValue() const { return this == False; }
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virtual bool isAllOnesValue() const { return this == True; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantBool *) { return true; }
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static bool classof(const Constant *CPV) {
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return (CPV == True) | (CPV == False);
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}
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
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/// with integral constants easier.
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///
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class ConstantInt : public ConstantIntegral {
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protected:
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union {
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int64_t Signed;
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uint64_t Unsigned;
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} Val;
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ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
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ConstantInt(const Type *Ty, uint64_t V);
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public:
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/// equalsInt - Provide a helper method that can be used to determine if the
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/// constant contained within is equal to a constant. This only works for
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/// very small values, because this is all that can be represented with all
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/// types.
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///
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bool equalsInt(unsigned char V) const {
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assert(V <= 127 &&
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"equals: Can only be used with very small positive constants!");
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return Val.Unsigned == V;
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}
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/// ConstantInt::get static method: return a ConstantInt with the specified
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/// value. as above, we work only with very small values here.
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///
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static ConstantInt *get(const Type *Ty, unsigned char V);
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/// getRawValue - return the underlying value of this constant as a 64-bit
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/// unsigned integer value.
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///
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inline uint64_t getRawValue() const { return Val.Unsigned; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return Val.Unsigned == 0; }
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virtual bool isMaxValue() const = 0;
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virtual bool isMinValue() const = 0;
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
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///
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class ConstantSInt : public ConstantInt {
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ConstantSInt(const ConstantSInt &); // DO NOT IMPLEMENT
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friend struct ConstantCreator<ConstantSInt, Type, int64_t>;
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protected:
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ConstantSInt(const Type *Ty, int64_t V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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///
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static ConstantSInt *get(const Type *Ty, int64_t V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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///
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static bool isValueValidForType(const Type *Ty, int64_t V);
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/// getValue - return the underlying value of this constant.
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///
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inline int64_t getValue() const { return Val.Signed; }
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virtual bool isAllOnesValue() const { return getValue() == -1; }
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isMaxValue() const {
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int64_t V = getValue();
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if (V < 0) return false; // Be careful about wrap-around on 'long's
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++V;
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return !isValueValidForType(getType(), V) || V < 0;
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}
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/// isMinValue - Return true if this is the smallest value that may be
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/// represented by this type.
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///
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virtual bool isMinValue() const {
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int64_t V = getValue();
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if (V > 0) return false; // Be careful about wrap-around on 'long's
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--V;
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return !isValueValidForType(getType(), V) || V > 0;
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}
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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///
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static inline bool classof(const ConstantSInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
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///
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class ConstantUInt : public ConstantInt {
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ConstantUInt(const ConstantUInt &); // DO NOT IMPLEMENT
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friend struct ConstantCreator<ConstantUInt, Type, uint64_t>;
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protected:
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ConstantUInt(const Type *Ty, uint64_t V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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///
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static ConstantUInt *get(const Type *Ty, uint64_t V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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///
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static bool isValueValidForType(const Type *Ty, uint64_t V);
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/// getValue - return the underlying value of this constant.
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///
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inline uint64_t getValue() const { return Val.Unsigned; }
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isAllOnesValue() const;
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virtual bool isMaxValue() const { return isAllOnesValue(); }
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virtual bool isMinValue() const { return getValue() == 0; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantUInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantFP - Floating Point Values [float, double]
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///
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class ConstantFP : public Constant {
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double Val;
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friend struct ConstantCreator<ConstantFP, Type, double>;
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ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
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protected:
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ConstantFP(const Type *Ty, double V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantFP *get(const Type *Ty, double V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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static bool isValueValidForType(const Type *Ty, double V);
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inline double getValue() const { return Val; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return Val == 0; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantFP *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantArray - Constant Array Declarations
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///
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class ConstantArray : public Constant {
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friend struct ConstantCreator<ConstantArray, ArrayType,
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std::vector<Constant*> >;
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ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
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protected:
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ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantArray *get(const ArrayType *T, const std::vector<Constant*> &);
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static ConstantArray *get(const std::string &Initializer);
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/// getType - Specialize the getType() method to always return an ArrayType,
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/// which reduces the amount of casting needed in parts of the compiler.
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///
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inline const ArrayType *getType() const {
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return (ArrayType*)Value::getType();
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}
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/// getAsString - If the sub-element type of this array is either sbyte or
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/// ubyte, then this method converts the array to an std::string and returns
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/// it. Otherwise, it asserts out.
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///
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std::string getAsString() const;
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/// getValues - Return a vector of the component constants that make up this
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/// array.
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inline const std::vector<Use> &getValues() const { return Operands; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const {
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// FIXME: This should be made to be MUCH faster. Just check against well
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// known null value!
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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if (!cast<Constant>(getOperand(i))->isNullValue())
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return false;
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return true;
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}
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantArray *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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// ConstantStruct - Constant Struct Declarations
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//
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class ConstantStruct : public Constant {
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friend struct ConstantCreator<ConstantStruct, StructType,
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std::vector<Constant*> >;
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ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
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protected:
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ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantStruct *get(const StructType *T,
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const std::vector<Constant*> &V);
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/// getType() specialization - Reduce amount of casting...
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inline const StructType *getType() const {
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return (StructType*)Value::getType();
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}
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/// getValues - Return a vector of the component constants that make up this
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/// structure.
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inline const std::vector<Use> &getValues() const { return Operands; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const {
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// FIXME: This should be made to be MUCH faster. Just check against well
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// known null value!
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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if (!cast<Constant>(getOperand(i))->isNullValue())
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return false;
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return true;
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}
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantStruct *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantPointer - Constant Pointer Declarations
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///
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/// The ConstantPointer class represents a null pointer of a specific type. For
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/// a more specific/useful instance, a subclass of ConstantPointer should be
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/// used.
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///
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class ConstantPointer : public Constant {
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ConstantPointer(const ConstantPointer &); // DO NOT IMPLEMENT
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protected:
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inline ConstantPointer(const PointerType *T) : Constant((const Type*)T) {}
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public:
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inline const PointerType *getType() const {
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return (PointerType*)Value::getType();
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}
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return false; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantPointer *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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/// ConstantPointerNull - a constant pointer value that points to null
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///
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class ConstantPointerNull : public ConstantPointer {
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friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
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ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
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protected:
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ConstantPointerNull(const PointerType *T) : ConstantPointer(T) {}
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantPointerNull *get(const PointerType *T);
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return true; }
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virtual void destroyConstant();
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantPointerNull *) { return true; }
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static inline bool classof(const ConstantPointer *P) {
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return (P->getNumOperands() == 0 && P->isNullValue());
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}
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static inline bool classof(const Constant *CPV) {
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return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
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}
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static inline bool classof(const Value *V) {
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return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
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}
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};
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/// ConstantPointerRef - a constant pointer value that is initialized to
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/// point to a global value, which lies at a constant, fixed address.
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///
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class ConstantPointerRef : public ConstantPointer {
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friend class Module; // Modules maintain these references
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ConstantPointerRef(const ConstantPointerRef &); // DNI!
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protected:
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ConstantPointerRef(GlobalValue *GV);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantPointerRef *get(GlobalValue *GV);
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const GlobalValue *getValue() const {
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return cast<GlobalValue>(Operands[0].get());
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}
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GlobalValue *getValue() {
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return cast<GlobalValue>(Operands[0].get());
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}
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantPointerRef *) { return true; }
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static inline bool classof(const ConstantPointer *CPV) {
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// check for a single operand (the target value)
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return (CPV->getNumOperands() == 1);
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}
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static inline bool classof(const Constant *CPV) {
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return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
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}
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static inline bool classof(const Value *V) {
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return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
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}
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};
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// ConstantExpr - a constant value that is initialized with an expression using
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// other constant values. This is only used to represent values that cannot be
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// evaluated at compile-time (e.g., something derived from an address) because
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// it does not have a mechanism to store the actual value. Use the appropriate
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// Constant subclass above for known constants.
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//
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class ConstantExpr : public Constant {
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unsigned iType; // Operation type (an Instruction opcode)
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friend struct ConstantCreator<ConstantExpr,Type,
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std::pair<unsigned, std::vector<Constant*> > >;
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friend struct ConvertConstantType<ConstantExpr, Type>;
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protected:
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// Cast creation ctor
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ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty);
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// Binary/Shift instruction creation ctor
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ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2);
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// GEP instruction creation ctor
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ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
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const Type *DestTy);
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// These private methods are used by the type resolution code to create
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// ConstantExprs in intermediate forms.
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static Constant *getTy(const Type *Ty, unsigned Opcode,
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Constant *C1, Constant *C2);
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static Constant *getShiftTy(const Type *Ty,
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unsigned Opcode, Constant *C1, Constant *C2);
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static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
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const std::vector<Constant*> &IdxList);
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public:
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// Static methods to construct a ConstantExpr of different kinds. Note that
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// these methods may return a object that is not an instance of the
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// ConstantExpr class, because they will attempt to fold the constant
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// expression into something simpler if possible.
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/// Cast constant expr
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///
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static Constant *getCast(Constant *C, const Type *Ty);
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/// Binary constant expr - Use with binary operators...
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///
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static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
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return getTy(C1->getType(), Opcode, C1, C2);
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}
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/// getShift - Return a shift left or shift right constant expr
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///
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static Constant *getShift(unsigned Opcode, Constant *C1, Constant *C2) {
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return getShiftTy(C1->getType(), Opcode, C1, C2);
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}
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/// Getelementptr form...
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///
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static Constant *getGetElementPtr(Constant *C,
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const std::vector<Constant*> &IdxList);
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|
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return false; }
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/// getOpcode - Return the opcode at the root of this constant expression
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unsigned getOpcode() const { return iType; }
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/// getOpcodeName - Return a string representation for an opcode.
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const char *getOpcodeName() const;
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/// isConstantExpr - Return true if this is a ConstantExpr
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virtual bool isConstantExpr() const { return true; }
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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|
|
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/// Override methods to provide more type information...
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inline Constant *getOperand(unsigned i) {
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return cast<Constant>(User::getOperand(i));
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}
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inline Constant *getOperand(unsigned i) const {
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return const_cast<Constant*>(cast<Constant>(User::getOperand(i)));
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}
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|
|
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantExpr *) { return true; }
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static inline bool classof(const Constant *CPV) {
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return CPV->isConstantExpr();
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}
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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#endif
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