-//===-- llvm/ConstantVals.h - Constant Value nodes ---------------*- C++ -*--=//
+//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
//
-// This file contains the declarations for the Constant class and all of
-// its subclasses, which represent the different type of constant pool values
+// 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
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CONSTPOOLVALS_H
-#define LLVM_CONSTPOOLVALS_H
+#ifndef LLVM_CONSTANTS_H
+#define LLVM_CONSTANTS_H
-#include "llvm/User.h"
+#include "llvm/Constant.h"
#include "Support/DataTypes.h"
+namespace llvm {
+
class ArrayType;
class StructType;
class PointerType;
-//===----------------------------------------------------------------------===//
-// Constant Class
-//===----------------------------------------------------------------------===//
+template<class ConstantClass, class TypeClass, class ValType>
+struct ConstantCreator;
+template<class ConstantClass, class TypeClass>
+struct ConvertConstantType;
+
-class Constant : public User {
+//===---------------------------------------------------------------------------
+/// ConstantIntegral - Shared superclass of boolean and integer constants.
+///
+/// This class just defines some common interfaces to be implemented.
+///
+class ConstantIntegral : public Constant {
protected:
- inline Constant(const Type *Ty) : User(Ty, Value::ConstantVal) {}
- ~Constant() {}
-
- // destroyConstant - Called if some element of this constant is no longer
- // valid. At this point only other constants may be on the use_list for this
- // constant. Any constants on our Use list must also be destroy'd. The
- // implementation must be sure to remove the constant from the list of
- // available cached constants. Implementations should call
- // destroyConstantImpl as the last thing they do, to destroy all users and
- // delete this.
- //
- virtual void destroyConstant() { assert(0 && "Not reached!"); }
- void destroyConstantImpl();
+ ConstantIntegral(const Type *Ty) : Constant(Ty) {}
public:
- // Specialize setName to handle symbol table majik...
- virtual void setName(const std::string &name, SymbolTable *ST = 0);
-
- // Static constructor to get a '0' constant of arbitrary type...
- static Constant *getNullConstant(const Type *Ty);
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ ///
virtual bool isNullValue() const = 0;
- virtual void print(std::ostream &O) const;
-
- // Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const Constant *) { return true; }
+ /// isMaxValue - Return true if this is the largest value that may be
+ /// represented by this type.
+ ///
+ virtual bool isMaxValue() const = 0;
+
+ /// isMinValue - Return true if this is the smallest value that may be
+ /// represented by this type.
+ ///
+ virtual bool isMinValue() const = 0;
+
+ /// isAllOnesValue - Return true if every bit in this constant is set to true.
+ ///
+ virtual bool isAllOnesValue() const = 0;
+
+ /// Static constructor to get the maximum/minimum/allones constant of
+ /// specified (integral) type...
+ ///
+ static ConstantIntegral *getMaxValue(const Type *Ty);
+ static ConstantIntegral *getMinValue(const Type *Ty);
+ static ConstantIntegral *getAllOnesValue(const Type *Ty);
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ static inline bool classof(const ConstantIntegral *) { return true; }
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
- return V->getValueType() == Value::ConstantVal;
+ return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
-
-//===----------------------------------------------------------------------===//
-// Classes to represent constant pool variable defs
-//===----------------------------------------------------------------------===//
-
//===---------------------------------------------------------------------------
-// ConstantBool - Boolean Values
-//
-class ConstantBool : public Constant {
+/// ConstantBool - Boolean Values
+///
+class ConstantBool : public ConstantIntegral {
bool Val;
- ConstantBool(const ConstantBool &); // DO NOT IMPLEMENT
ConstantBool(bool V);
- ~ConstantBool() {}
public:
static ConstantBool *True, *False; // The True & False values
- // Factory objects - Return objects of the specified value
+ /// get() - Static factory methods - Return objects of the specified value
static ConstantBool *get(bool Value) { return Value ? True : False; }
static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); }
- // inverted - Return the opposite value of the current value.
+ /// inverted - Return the opposite value of the current value.
inline ConstantBool *inverted() const { return (this==True) ? False : True; }
+ /// getValue - return the boolean value of this constant.
+ ///
inline bool getValue() const { return Val; }
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ ///
virtual bool isNullValue() const { return this == False; }
+ virtual bool isMaxValue() const { return this == True; }
+ virtual bool isMinValue() const { return this == False; }
+ virtual bool isAllOnesValue() const { return this == True; }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantBool *) { return true; }
static bool classof(const Constant *CPV) {
return (CPV == True) | (CPV == False);
//===---------------------------------------------------------------------------
-// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
-// with integral constants easier.
-//
-class ConstantInt : public Constant {
+/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
+/// with integral constants easier.
+///
+class ConstantInt : public ConstantIntegral {
protected:
union {
int64_t Signed;
} 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 very
- // small values, because this is all that can be represented with all types.
- //
+ /// 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
+ /// very small values, because this is all that can be represented with all
+ /// types.
+ ///
bool equalsInt(unsigned char V) const {
assert(V <= 127 &&
"equals: Can only be used with very small positive constants!");
return Val.Unsigned == V;
}
- // ConstantInt::get static method: return a constant pool int with the
- // specified value. as above, we work only with very small values here.
- //
+ /// ConstantInt::get static method: return a ConstantInt with the specified
+ /// value. as above, we work only with very small values here.
+ ///
static ConstantInt *get(const Type *Ty, unsigned char V);
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
+ /// 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; }
+ virtual bool isMaxValue() const = 0;
+ virtual bool isMinValue() const = 0;
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantInt *) { return true; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
//===---------------------------------------------------------------------------
-// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
-//
+/// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
+///
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; }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ virtual bool isAllOnesValue() const { return getValue() == -1; }
+
+ /// isMaxValue - Return true if this is the largest value that may be
+ /// represented by this type.
+ ///
+ virtual bool isMaxValue() const {
+ int64_t V = getValue();
+ if (V < 0) return false; // Be careful about wrap-around on 'long's
+ ++V;
+ return !isValueValidForType(getType(), V) || V < 0;
+ }
+
+ /// isMinValue - Return true if this is the smallest value that may be
+ /// represented by this type.
+ ///
+ virtual bool isMinValue() const {
+ int64_t V = getValue();
+ if (V > 0) return false; // Be careful about wrap-around on 'long's
+ --V;
+ return !isValueValidForType(getType(), V) || V > 0;
+ }
+
+ /// 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 CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
//===---------------------------------------------------------------------------
-// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
-//
+/// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
+///
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; }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// isMaxValue - Return true if this is the largest value that may be
+ /// represented by this type.
+ ///
+ virtual bool isAllOnesValue() const;
+ virtual bool isMaxValue() const { return isAllOnesValue(); }
+ virtual bool isMinValue() const { return getValue() == 0; }
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantUInt *) { return true; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
//===---------------------------------------------------------------------------
-// ConstantFP - Floating Point Values [float, double]
-//
+/// ConstantFP - Floating Point Values [float, double]
+///
class ConstantFP : public Constant {
double Val;
+ friend struct ConstantCreator<ConstantFP, Type, uint64_t>;
+ friend struct ConstantCreator<ConstantFP, Type, uint32_t>;
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);
+ /// isValueValidForType - return true if Ty is big enough to represent V.
static bool isValueValidForType(const Type *Ty, double V);
inline double getValue() const { return Val; }
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
- virtual bool isNullValue() const { return Val == 0; }
+ /// 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 {
+ union {
+ double V;
+ uint64_t I;
+ } T;
+ T.V = Val;
+ return T.I == 0;
+ }
+
+ /// isExactlyValue - We don't rely on operator== working on double values, as
+ /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
+ /// As such, this method can be used to do an exact bit-for-bit comparison of
+ /// two floating point values.
+ bool isExactlyValue(double V) const {
+ union {
+ double V;
+ uint64_t I;
+ } T1;
+ T1.V = Val;
+ union {
+ double V;
+ uint64_t I;
+ } T2;
+ T2.V = V;
+ return T1.I == T2.I;
+ }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
+ static inline bool classof(const Value *V) {
+ return isa<Constant>(V) && classof(cast<Constant>(V));
+ }
+};
+
+//===---------------------------------------------------------------------------
+/// ConstantAggregateZero - All zero aggregate value
+///
+class ConstantAggregateZero : public Constant {
+ friend struct ConstantCreator<ConstantAggregateZero, Type, char>;
+ ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
+protected:
+ ConstantAggregateZero(const Type *Ty) : Constant(Ty) {}
+public:
+ /// get() - static factory method for creating a null aggregate. It is
+ /// illegal to call this method with a non-aggregate type.
+ static Constant *get(const Type *Ty);
+
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ virtual bool isNullValue() const { return true; }
+
+ virtual void destroyConstant();
+ 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 ConstantAggregateZero *) { return true; }
+ static bool classof(const Constant *CPV);
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
//===---------------------------------------------------------------------------
-// ConstantArray - Constant Array Declarations
-//
+/// 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() {}
-
- virtual void destroyConstant();
public:
- static ConstantArray *get(const ArrayType *T, const std::vector<Constant*> &);
- static ConstantArray *get(const std::string &Initializer);
+ /// get() - Static factory methods - Return objects of the specified value
+ static Constant *get(const ArrayType *T, const std::vector<Constant*> &);
+ static Constant *get(const std::string &Initializer);
+ /// getType - Specialize the getType() method to always return an ArrayType,
+ /// which reduces the amount of casting needed in parts of the compiler.
+ ///
inline const ArrayType *getType() const {
- return (ArrayType*)Value::getType();
+ return reinterpret_cast<const ArrayType*>(Value::getType());
}
+ /// isString - This method returns true if the array is an array of sbyte or
+ /// ubyte, and if the elements of the array are all ConstantInt's.
+ bool isString() const;
+
+ /// getAsString - If this array is isString(), then this method converts the
+ /// array to an std::string and returns it. Otherwise, it asserts out.
+ ///
+ std::string getAsString() const;
+
+ /// getValues - Return a vector of the component constants that make up this
+ /// array.
inline const std::vector<Use> &getValues() const { return Operands; }
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue. This always returns false because zero arrays are always
+ /// created as ConstantAggregateZero objects.
virtual bool isNullValue() const { return false; }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ virtual void destroyConstant();
+ 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; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
// 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() {}
-
- virtual void destroyConstant();
public:
- static ConstantStruct *get(const StructType *T,
- const std::vector<Constant*> &V);
+ /// get() - Static factory methods - Return objects of the specified value
+ static Constant *get(const StructType *T, const std::vector<Constant*> &V);
+ /// getType() specialization - Reduce amount of casting...
inline const StructType *getType() const {
- return (StructType*)Value::getType();
+ return reinterpret_cast<const StructType*>(Value::getType());
}
+ /// getValues - Return a vector of the component constants that make up this
+ /// structure.
inline const std::vector<Use> &getValues() const { return Operands; }
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
- virtual bool isNullValue() const { return false; }
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue. This always returns false because zero structs are always
+ /// created as ConstantAggregateZero objects.
+ virtual bool isNullValue() const {
+ return false;
+ }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ virtual void destroyConstant();
+ 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; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
+ static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
//===---------------------------------------------------------------------------
-// ConstantPointer - Constant Pointer Declarations
-//
-// The ConstantPointer class represents a null pointer of a specific type. For
-// a more specific/useful instance, a subclass of ConstantPointer should be
-// used.
-//
-class ConstantPointer : public Constant {
- ConstantPointer(const ConstantPointer &); // DO NOT IMPLEMENT
-protected:
- inline ConstantPointer(const PointerType *T) : Constant((const Type*)T){}
- ~ConstantPointer() {}
-public:
- inline const PointerType *getType() const {
- return (PointerType*)Value::getType();
- }
-
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
- virtual bool isNullValue() const { return false; }
-
- // Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const ConstantPointer *) { return true; }
- static bool classof(const Constant *CPV); // defined in CPV.cpp
- static inline bool classof(const Value *V) {
- return isa<Constant>(V) && classof(cast<Constant>(V));
- }
-};
-
-// ConstantPointerNull - a constant pointer value that points to null
-//
-class ConstantPointerNull : public ConstantPointer {
+/// ConstantPointerNull - a constant pointer value that points to null
+///
+class ConstantPointerNull : public Constant {
+ 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)
+ : Constant(reinterpret_cast<const Type*>(T)) {}
+
public:
+ /// get() - Static factory methods - Return objects of the specified value
static ConstantPointerNull *get(const PointerType *T);
- // isNullValue - Return true if this is the value that would be returned by
- // getNullConstant.
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
virtual bool isNullValue() const { return true; }
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ virtual void destroyConstant();
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantPointerNull *) { return true; }
- static inline bool classof(const ConstantPointer *P) {
- return P->getNumOperands() == 0;
- }
- static inline bool classof(const Constant *CPV) {
- return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
- }
+ static bool classof(const Constant *CPV);
static inline bool classof(const Value *V) {
- return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
+ return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
-// ConstantPointerRef - a constant pointer value that is initialized to
-// point to a global value, which lies at a constant, fixed address.
-//
-class ConstantPointerRef : public ConstantPointer {
+//===---------------------------------------------------------------------------
+/// ConstantPointerRef - a constant pointer value that is initialized to
+/// point to a global value, which lies at a constant, fixed address.
+///
+class ConstantPointerRef : public Constant {
friend class Module; // Modules maintain these references
ConstantPointerRef(const ConstantPointerRef &); // DNI!
protected:
ConstantPointerRef(GlobalValue *GV);
- ~ConstantPointerRef() {}
-
- virtual void destroyConstant() { destroyConstantImpl(); }
public:
+ /// get() - Static factory methods - Return objects of the specified value
static ConstantPointerRef *get(GlobalValue *GV);
const GlobalValue *getValue() const {
return cast<GlobalValue>(Operands[0].get());
}
+
GlobalValue *getValue() {
return cast<GlobalValue>(Operands[0].get());
}
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ virtual bool isNullValue() const { return false; }
+
+ virtual void destroyConstant();
+ 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; }
- static inline bool classof(const ConstantPointer *CPV) {
- return CPV->getNumOperands() == 1;
+ static bool classof(const Constant *CPV);
+ static inline bool classof(const Value *V) {
+ return isa<Constant>(V) && classof(cast<Constant>(V));
+ }
+};
+
+// 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 (an Instruction opcode)
+ friend struct ConstantCreator<ConstantExpr,Type,
+ std::pair<unsigned, std::vector<Constant*> > >;
+ friend struct ConvertConstantType<ConstantExpr, Type>;
+
+protected:
+ // 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);
+
+ // 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 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);
+
+ /// ConstantExpr::get - Return a binary or shift operator constant expression,
+ /// folding if possible.
+ ///
+ static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
+ return getTy(C1->getType(), Opcode, C1, C2);
+ }
+
+ /// Getelementptr form...
+ ///
+ static Constant *getGetElementPtr(Constant *C,
+ const std::vector<Constant*> &IdxList);
+
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ virtual bool isNullValue() const { return false; }
+
+ /// getOpcode - Return the opcode at the root of this constant expression
+ unsigned getOpcode() const { return iType; }
+
+ /// getOpcodeName - Return a string representation for an opcode.
+ const char *getOpcodeName() const;
+
+ /// isConstantExpr - Return true if this is a ConstantExpr
+ virtual bool isConstantExpr() const { return true; }
+
+ virtual void destroyConstant();
+ 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) {
- return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
+ return CPV->isConstantExpr();
}
static inline bool classof(const Value *V) {
- return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
+ return isa<Constant>(V) && classof(cast<Constant>(V));
}
-
- // WARNING: Only to be used by Bytecode & Assembly Parsers! USER CODE SHOULD
- // NOT USE THIS!!
- void mutateReference(GlobalValue *NewGV);
- // END WARNING!!
};
-
+} // End llvm namespace
#endif
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