-//===-- llvm/Constants.h - Constant class subclass definitions ---*- C++ -*--=//
+//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===//
+//
+// 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 contains the declarations for the subclasses of Constant, which
// represent the different type of constant pool values
class StructType;
class PointerType;
+template<class ConstantClass, class TypeClass, class ValType>
+struct ConstantCreator;
+template<class ConstantClass, class TypeClass>
+struct ConvertConstantType;
+
//===---------------------------------------------------------------------------
/// ConstantIntegral - Shared superclass of boolean and integer constants.
class ConstantBool : public ConstantIntegral {
bool Val;
ConstantBool(bool V);
- ~ConstantBool() {}
public:
static ConstantBool *True, *False; // The True & False values
} Val;
ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
ConstantInt(const Type *Ty, uint64_t V);
- ~ConstantInt() {}
public:
/// equalsInt - Provide a helper method that can be used to determine if the
/// constant contained within is equal to a constant. This only works for
///
static ConstantInt *get(const Type *Ty, unsigned char V);
+ /// getRawValue - return the underlying value of this constant as a 64-bit
+ /// unsigned integer value.
+ ///
+ inline uint64_t getRawValue() const { return Val.Unsigned; }
+
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return Val.Unsigned == 0; }
///
class ConstantSInt : public ConstantInt {
ConstantSInt(const ConstantSInt &); // DO NOT IMPLEMENT
+ friend struct ConstantCreator<ConstantSInt, Type, int64_t>;
+
protected:
ConstantSInt(const Type *Ty, int64_t V);
- ~ConstantSInt() {}
public:
/// get() - Static factory methods - Return objects of the specified value
+ ///
static ConstantSInt *get(const Type *Ty, int64_t V);
/// isValueValidForType - return true if Ty is big enough to represent V.
+ ///
static bool isValueValidForType(const Type *Ty, int64_t V);
/// getValue - return the underlying value of this constant.
+ ///
inline int64_t getValue() const { return Val.Signed; }
virtual bool isAllOnesValue() const { return getValue() == -1; }
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
+ ///
static inline bool classof(const ConstantSInt *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
///
class ConstantUInt : public ConstantInt {
ConstantUInt(const ConstantUInt &); // DO NOT IMPLEMENT
+ friend struct ConstantCreator<ConstantUInt, Type, uint64_t>;
protected:
ConstantUInt(const Type *Ty, uint64_t V);
- ~ConstantUInt() {}
public:
/// get() - Static factory methods - Return objects of the specified value
+ ///
static ConstantUInt *get(const Type *Ty, uint64_t V);
/// isValueValidForType - return true if Ty is big enough to represent V.
+ ///
static bool isValueValidForType(const Type *Ty, uint64_t V);
/// getValue - return the underlying value of this constant.
+ ///
inline uint64_t getValue() const { return Val.Unsigned; }
/// isMaxValue - Return true if this is the largest value that may be
///
class ConstantFP : public Constant {
double Val;
+ friend struct ConstantCreator<ConstantFP, Type, double>;
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
protected:
ConstantFP(const Type *Ty, double V);
- ~ConstantFP() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantFP *get(const Type *Ty, double V);
/// ConstantArray - Constant Array Declarations
///
class ConstantArray : public Constant {
+ friend struct ConstantCreator<ConstantArray, ArrayType,
+ std::vector<Constant*> >;
ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
protected:
ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
- ~ConstantArray() {}
-
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantArray *get(const ArrayType *T, const std::vector<Constant*> &);
}
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To);
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
+ bool DisableChecking = false);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantArray *) { return true; }
// ConstantStruct - Constant Struct Declarations
//
class ConstantStruct : public Constant {
+ friend struct ConstantCreator<ConstantStruct, StructType,
+ std::vector<Constant*> >;
ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
protected:
ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
- ~ConstantStruct() {}
-
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantStruct *get(const StructType *T,
}
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To);
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
+ bool DisableChecking = false);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantStruct *) { return true; }
class ConstantPointer : public Constant {
ConstantPointer(const ConstantPointer &); // DO NOT IMPLEMENT
protected:
- inline ConstantPointer(const PointerType *T) : Constant((const Type*)T){}
- ~ConstantPointer() {}
+ inline ConstantPointer(const PointerType *T) : Constant((const Type*)T) {}
public:
inline const PointerType *getType() const {
return (PointerType*)Value::getType();
/// ConstantPointerNull - a constant pointer value that points to null
///
class ConstantPointerNull : public ConstantPointer {
+ friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
- inline ConstantPointerNull(const PointerType *T) : ConstantPointer(T) {}
- inline ~ConstantPointerNull() {}
+ ConstantPointerNull(const PointerType *T) : ConstantPointer(T) {}
+
public:
/// get() - Static factory methods - Return objects of the specified value
protected:
ConstantPointerRef(GlobalValue *GV);
- ~ConstantPointerRef() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantPointerRef *get(GlobalValue *GV);
}
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To);
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
+ bool DisableChecking = false);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantPointerRef *) { return true; }
}
};
-
-// ConstantExpr - a constant value that is initialized with
-// an expression using other constant values. This is only used
-// to represent values that cannot be evaluated at compile-time
-// (e.g., something derived from an address) because it does
-// not have a mechanism to store the actual value.
-// Use the appropriate Constant subclass above for known constants.
+// ConstantExpr - a constant value that is initialized with an expression using
+// other constant values. This is only used to represent values that cannot be
+// evaluated at compile-time (e.g., something derived from an address) because
+// it does not have a mechanism to store the actual value. Use the appropriate
+// Constant subclass above for known constants.
//
class ConstantExpr : public Constant {
- unsigned iType; // Operation type
+ unsigned iType; // Operation type (an Instruction opcode)
+ friend struct ConstantCreator<ConstantExpr,Type,
+ std::pair<unsigned, std::vector<Constant*> > >;
+ friend struct ConvertConstantType<ConstantExpr, Type>;
protected:
- ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty);
+ // Cast creation ctor
+ ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty);
+ // Binary/Shift instruction creation ctor
ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2);
+ // GEP instruction creation ctor
ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
const Type *DestTy);
- ~ConstantExpr() {}
+
+ // 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);
+ static Constant *getShiftTy(const Type *Ty,
+ unsigned Opcode, Constant *C1, Constant *C2);
+ static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
+ const std::vector<Constant*> &IdxList);
public:
// Static methods to construct a ConstantExpr of different kinds. Note that
- // these methods can return a constant of an arbitrary type, because they will
- // attempt to fold the constant expression into something simple if they can.
+ // these methods may return a object that is not an instance of the
+ // ConstantExpr class, because they will attempt to fold the constant
+ // expression into something simpler if possible.
/// Cast constant expr
+ ///
static Constant *getCast(Constant *C, const Type *Ty);
/// Binary constant expr - Use with binary operators...
- static Constant *get(unsigned Opcode, Constant *C1, Constant *C2);
+ ///
+ static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
+ return getTy(C1->getType(), Opcode, C1, C2);
+ }
+
+ /// getShift - Return a shift left or shift right constant expr
+ ///
+ static Constant *getShift(unsigned Opcode, Constant *C1, Constant *C2) {
+ return getShiftTy(C1->getType(), Opcode, C1, C2);
+ }
/// Getelementptr form...
+ ///
static Constant *getGetElementPtr(Constant *C,
const std::vector<Constant*> &IdxList);
virtual bool isConstantExpr() const { return true; }
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To);
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
+ bool DisableChecking = false);
+ /// Override methods to provide more type information...
+ inline Constant *getOperand(unsigned i) {
+ return cast<Constant>(User::getOperand(i));
+ }
+ inline Constant *getOperand(unsigned i) const {
+ return const_cast<Constant*>(cast<Constant>(User::getOperand(i)));
+ }
+
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantExpr *) { return true; }
static inline bool classof(const Constant *CPV) {
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