//===-- 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
+/// @file This file contains the declarations for the subclasses of Constant,
+/// which represent the different flavors of constant values that live in LLVM.
+/// Note that Constants are immutable (once created they never change) and are
+/// fully shared by structural equivalence. This means that two structurally
+/// equivalent constants will always have the same address. Constant's are
+/// created on demand as needed and never deleted: thus clients don't have to
+/// worry about the lifetime of the objects.
//
//===----------------------------------------------------------------------===//
#include "llvm/Constant.h"
#include "llvm/Type.h"
-#include "Support/DataTypes.h"
namespace llvm {
class ArrayType;
class StructType;
class PointerType;
+class PackedType;
template<class ConstantClass, class TypeClass, class ValType>
struct ConstantCreator;
template<class ConstantClass, class TypeClass>
struct ConvertConstantType;
-
-//===---------------------------------------------------------------------------
-/// ConstantIntegral - Shared superclass of boolean and integer constants.
-///
-/// This class just defines some common interfaces to be implemented.
-///
+//===----------------------------------------------------------------------===//
+/// This is the shared superclass of boolean and integer constants. This class
+/// just defines some common interfaces to be implemented by the subclasses.
+/// @brief An abstract class for integer constants.
class ConstantIntegral : public Constant {
protected:
- union {
- int64_t Signed;
- uint64_t Unsigned;
- } Val;
- ConstantIntegral(const Type *Ty, uint64_t V);
+ uint64_t Val;
+ ConstantIntegral(const Type *Ty, ValueTy VT, uint64_t V);
public:
+ /// Return the constant as a 64-bit unsigned integer value after it
+ /// has been zero extended as appropriate for the type of this constant.
+ /// @brief Return the zero extended value.
+ inline uint64_t getZExtValue() const {
+ return Val;
+ }
- /// 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.
- ///
+ /// Return the constant as a 64-bit integer value after it has been sign
+ /// sign extended as appropriate for the type of this constant.
+ /// @brief Return the sign extended value.
+ inline int64_t getSExtValue() const {
+ unsigned Size = getType()->getPrimitiveSizeInBits();
+ return (int64_t(Val) << (64-Size)) >> (64-Size);
+ }
+
+ /// This function is implemented by subclasses and will return true iff this
+ /// constant represents the the "null" value that would be returned by the
+ /// getNullValue method.
+ /// @returns true if the constant's value is 0.
+ /// @brief Determine if the value is null.
virtual bool isNullValue() const = 0;
- /// isMaxValue - Return true if this is the largest value that may be
- /// represented by this type.
- ///
+ /// This function is implemented by sublcasses and will return true iff this
+ /// constant represents the the largest value that may be represented by this
+ /// constant's type.
+ /// @returns true if the constant's value is maximal.
+ /// @brief Determine if the value is maximal.
virtual bool isMaxValue() const = 0;
- /// isMinValue - Return true if this is the smallest value that may be
- /// represented by this type.
- ///
+ /// This function is implemented by subclasses and will return true iff this
+ /// constant represents the smallest value that may be represented by this
+ /// constant's type.
+ /// @returns true if the constant's value is minimal
+ /// @brief Determine if the value is minimal.
virtual bool isMinValue() const = 0;
- /// isAllOnesValue - Return true if every bit in this constant is set to true.
- ///
+ /// This function is implemented by subclasses and will return true iff every
+ /// bit in this constant is set to true.
+ /// @returns true if all bits of the constant are ones.
+ /// @brief Determine if the value is all ones.
virtual bool isAllOnesValue() const = 0;
- /// Static constructor to get the maximum/minimum/allones constant of
- /// specified (integral) type...
- ///
+ /// @returns the largest value for an integer constant of the given type
+ /// @brief Get the maximal value
static ConstantIntegral *getMaxValue(const Type *Ty);
+
+ /// @returns the smallest value for an integer constant of the given type
+ /// @brief Get the minimal value
static ConstantIntegral *getMinValue(const Type *Ty);
+
+ /// @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 ConstantIntegral *getAllOnesValue(const Type *Ty);
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// Methods to support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantIntegral *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->isIntegral();
+ return V->getValueType() == ConstantBoolVal ||
+ V->getValueType() == ConstantIntVal;
}
};
-//===---------------------------------------------------------------------------
-/// ConstantBool - Boolean Values
-///
+//===----------------------------------------------------------------------===//
+/// This concrete class represents constant values of type BoolTy. There are
+/// only two instances of this class constructed: the True and False static
+/// members. The constructor is hidden to ensure this invariant.
+/// @brief Constant Boolean class
class ConstantBool : public ConstantIntegral {
ConstantBool(bool V);
public:
- static ConstantBool *True, *False; // The True & False values
-
- /// get() - Static factory methods - Return objects of the specified value
- static ConstantBool *get(bool Value) { return Value ? True : False; }
+ /// getTrue/getFalse - Return the singleton true/false values.
+ static ConstantBool *getTrue();
+ static ConstantBool *getFalse();
+
+ /// This method is provided mostly for compatibility with the other
+ /// ConstantIntegral subclasses.
+ /// @brief Static factory method for getting a ConstantBool instance.
+ static ConstantBool *get(bool Value) { return Value ? getTrue() : getFalse();}
+
+ /// This method is provided mostly for compatibility with the other
+ /// ConstantIntegral subclasses.
+ /// @brief Static factory method for getting a ConstantBool instance.
static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); }
- /// inverted - Return the opposite value of the current value.
- inline ConstantBool *inverted() const { return (this==True) ? False : True; }
+ /// Returns the opposite value of this ConstantBool value.
+ /// @brief Get inverse value.
+ inline ConstantBool *inverted() const {
+ return getValue() ? getFalse() : getTrue();
+ }
- /// getValue - return the boolean value of this constant.
- ///
- inline bool getValue() const { return static_cast<bool>(getRawValue()); }
+ /// @returns the value of this ConstantBool
+ /// @brief return the boolean value of this constant.
+ inline bool getValue() const { return static_cast<bool>(getZExtValue()); }
- /// 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; }
+ /// @see ConstantIntegral for details
+ /// @brief Implement overrides
+ virtual bool isNullValue() const { return getValue() == false; }
+ virtual bool isMaxValue() const { return getValue() == true; }
+ virtual bool isMinValue() const { return getValue() == false; }
+ virtual bool isAllOnesValue() const { return getValue() == true; }
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ /// @brief Methods to support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantBool *) { return true; }
static bool classof(const Value *V) {
- return (V == True) | (V == False);
+ return V->getValueType() == ConstantBoolVal;
}
};
-//===---------------------------------------------------------------------------
-/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
-/// with integral constants easier.
-///
+//===----------------------------------------------------------------------===//
+/// This is concrete integer subclass of ConstantIntegral that represents
+/// both signed and unsigned integral constants, other than boolean.
+/// @brief Class for constant integers.
class ConstantInt : public ConstantIntegral {
protected:
ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
ConstantInt(const Type *Ty, uint64_t V);
+ ConstantInt(const Type *Ty, int64_t V);
+ friend struct ConstantCreator<ConstantInt, Type, uint64_t>;
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.
- ///
+ /// A helper method that can be used to determine if the constant contained
+ /// within is equal to a constant. This only works for very small values,
+ /// because this is all that can be represented with all types.
+ /// @brief Determine if this constant's value is same as an unsigned char.
bool equalsInt(unsigned char V) const {
assert(V <= 127 &&
"equalsInt: Can only be used with very small positive constants!");
- return Val.Unsigned == V;
+ return Val == V;
}
- /// 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
- /// 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:
- static inline bool classof(const ConstantInt *) { return true; }
- static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->isInteger();
- }
-};
-
-
-//===---------------------------------------------------------------------------
-/// 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);
-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.
- ///
+ /// Return a ConstantInt with the specified value for the specified type. The
+ /// value V will be canonicalized to a uint64_t but accessing it with either
+ /// getSExtValue() or getZExtValue() (ConstantIntegral) will yield the correct
+ /// sized/signed value for the type Ty.
+ /// @brief Get a ConstantInt for a specific value.
+ static ConstantInt *get(const Type *Ty, int64_t V);
+
+ /// This static method returns true if the type Ty is big enough to
+ /// represent the value V. This can be used to avoid having the get method
+ /// assert when V is larger than Ty can represent.
+ /// @returns true if V is a valid value for type Ty
+ /// @brief Determine if the value is in range for the given type.
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; }
+ /// @returns true if this is the null integer value.
+ /// @see ConstantIntegral for details
+ /// @brief Implement override.
+ virtual bool isNullValue() const { return Val == 0; }
- virtual bool isAllOnesValue() const { return getValue() == -1; }
+ /// @returns true iff this constant's bits are all set to true.
+ /// @see ConstantIntegral
+ /// @brief Override implementation
+ virtual bool isAllOnesValue() const { return getSExtValue() == -1; }
- /// isMaxValue - Return true if this is the largest value that may be
- /// represented by this type.
- ///
+ /// @returns true iff this is the largest value that may be represented
+ /// by this type.
+ /// @see ConstantIntegeral
+ /// @brief Override implementation
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;
+ if (getType()->isSigned()) {
+ int64_t V = getSExtValue();
+ if (V < 0) return false; // Be careful about wrap-around on 'long's
+ ++V;
+ return !isValueValidForType(getType(), V) || V < 0;
+ }
+ return isAllOnesValue();
}
- /// isMinValue - Return true if this is the smallest value that may be
- /// represented by this type.
- ///
+ /// @returns true if this is the smallest value that may be represented by
+ /// this type.
+ /// @see ConstantIntegral
+ /// @brief Override implementation
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 Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->isSigned();
+ if (getType()->isSigned()) {
+ int64_t V = getSExtValue();
+ if (V > 0) return false; // Be careful about wrap-around on 'long's
+ --V;
+ return !isValueValidForType(getType(), V) || V > 0;
+ }
+ return getZExtValue() == 0;
}
-};
-
-//===---------------------------------------------------------------------------
-/// 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);
-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
- /// 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; }
+ /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
+ static inline bool classof(const ConstantInt *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->isUnsigned();
+ return V->getValueType() == ConstantIntVal;
}
};
-//===---------------------------------------------------------------------------
+//===----------------------------------------------------------------------===//
/// ConstantFP - Floating Point Values [float, double]
///
class ConstantFP : public Constant {
/// 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;
- }
+ virtual bool isNullValue() const;
/// 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;
- }
+ bool isExactlyValue(double V) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->isFloatingPoint();
+ return V->getValueType() == ConstantFPVal;
}
};
-//===---------------------------------------------------------------------------
+//===----------------------------------------------------------------------===//
/// ConstantAggregateZero - All zero aggregate value
///
class ConstantAggregateZero : public Constant {
ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
protected:
ConstantAggregateZero(const Type *Ty)
- : Constant(Ty, ConstantAggregateZeroVal) {}
+ : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {}
public:
/// get() - static factory method for creating a null aggregate. It is
/// illegal to call this method with a non-aggregate type.
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:
///
};
-//===---------------------------------------------------------------------------
+//===----------------------------------------------------------------------===//
/// ConstantArray - Constant Array Declarations
///
class ConstantArray : public 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 Constant *get(const ArrayType *T, const std::vector<Constant*> &);
- static Constant *get(const std::string &Initializer);
-
+
+ /// 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);
+
/// getType - Specialize the getType() method to always return an ArrayType,
/// which reduces the amount of casting needed in parts of the compiler.
///
/// ubyte, and if the elements of the array are all ConstantInt's.
bool isString() const;
+ /// isCString - This method returns true if the array is a string (see
+ /// isString) and it ends in a null byte \0 and does not contains any other
+ /// null bytes except its terminator.
+ bool isCString() const;
+
/// getAsString - If this array is isString(), then this method converts the
/// array to an std::string and returns it. Otherwise, it asserts out.
///
virtual bool isNullValue() const { return false; }
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking = false);
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantArray *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->getTypeID() == Type::ArrayTyID;
+ return V->getValueType() == ConstantArrayVal;
}
};
-//===---------------------------------------------------------------------------
+//===----------------------------------------------------------------------===//
// ConstantStruct - Constant Struct Declarations
//
class ConstantStruct : public 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
///
}
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking = false);
-
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantStruct *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- V->getType()->getTypeID() == Type::StructTyID;
+ return V->getValueType() == ConstantStructVal;
+ }
+};
+
+//===----------------------------------------------------------------------===//
+/// ConstantPacked - Constant Packed Declarations
+///
+class ConstantPacked : public Constant {
+ friend struct ConstantCreator<ConstantPacked, PackedType,
+ std::vector<Constant*> >;
+ ConstantPacked(const ConstantPacked &); // DO NOT IMPLEMENT
+protected:
+ ConstantPacked(const PackedType *T, const std::vector<Constant*> &Val);
+ ~ConstantPacked();
+public:
+ /// get() - Static factory methods - Return objects of the specified value
+ static Constant *get(const PackedType *T, const std::vector<Constant*> &);
+ static Constant *get(const std::vector<Constant*> &V);
+
+ /// getType - Specialize the getType() method to always return an PackedType,
+ /// which reduces the amount of casting needed in parts of the compiler.
+ ///
+ inline const PackedType *getType() const {
+ return reinterpret_cast<const PackedType*>(Value::getType());
+ }
+
+ /// 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; }
+
+ virtual void destroyConstant();
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ static inline bool classof(const ConstantPacked *) { return true; }
+ static bool classof(const Value *V) {
+ return V->getValueType() == ConstantPackedVal;
}
};
-//===---------------------------------------------------------------------------
+//===----------------------------------------------------------------------===//
/// ConstantPointerNull - a constant pointer value that points to null
///
class ConstantPointerNull : public Constant {
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
ConstantPointerNull(const PointerType *T)
- : Constant(reinterpret_cast<const Type*>(T)) {}
+ : Constant(reinterpret_cast<const Type*>(T),
+ Value::ConstantPointerNullVal, 0, 0) {}
public:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantPointerNull *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == SimpleConstantVal &&
- isa<PointerType>(V->getType());
+ return V->getValueType() == ConstantPointerNullVal;
}
};
-// 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 class uses the standard Instruction opcodes to define the various
+/// constant expressions. The Opcode field for the ConstantExpr class is
+/// maintained in the Value::SubclassData field.
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);
- // Select instruction creation ctor
- ConstantExpr(Constant *C, Constant *V1, Constant *V2);
- // GEP instruction creation ctor
- ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
- const Type *DestTy);
+ ConstantExpr(const Type *Ty, unsigned Opcode, Use *Ops, unsigned NumOps)
+ : Constant(Ty, ConstantExprVal, Ops, NumOps) {
+ // Operation type (an Instruction opcode) is stored as the SubclassData.
+ SubclassData = Opcode;
+ }
// These private methods are used by the type resolution code to create
// ConstantExprs in intermediate forms.
static Constant *getSelectTy(const Type *Ty,
Constant *C1, Constant *C2, Constant *C3);
static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
- const std::vector<Constant*> &IdxList);
-
+ const std::vector<Value*> &IdxList);
+ static Constant *getExtractElementTy(const Type *Ty, Constant *Val,
+ Constant *Idx);
+ static Constant *getInsertElementTy(const Type *Ty, Constant *Val,
+ Constant *Elt, Constant *Idx);
+ static Constant *getShuffleVectorTy(const Type *Ty, Constant *V1,
+ Constant *V2, Constant *Mask);
+
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 *getTrunc (Constant *C, const Type *Ty);
+ static Constant *getSignExtend (Constant *C, const Type *Ty);
+ static Constant *getZeroExtend (Constant *C, const Type *Ty);
+ static Constant *getFPTrunc (Constant *C, const Type *Ty);
+ static Constant *getFPExtend (Constant *C, const Type *Ty);
+ static Constant *getUIToFP (Constant *C, const Type *Ty);
+ static Constant *getSIToFP (Constant *C, const Type *Ty);
+ static Constant *getFPToUI (Constant *C, const Type *Ty);
+ static Constant *getFPToSI (Constant *C, const Type *Ty);
+ static Constant *getPtrToInt (Constant *C, const Type *Ty);
+ static Constant *getIntToPtr (Constant *C, const Type *Ty);
+ static Constant *getBitCast (Constant *C, const Type *Ty);
+
+ // @brief Convenience function for getting one of the casting operations
+ // using a CastOps opcode.
+ static Constant *getCast(
+ unsigned ops, ///< The opcode for the conversion
+ Constant *C, ///< The constant to be converted
+ const Type *Ty ///< The type to which the constant is converted
+ );
+
+ // @brief Get a ConstantExpr Conversion operator that casts C to Ty
static Constant *getCast(Constant *C, const Type *Ty);
- static Constant *getSignExtend(Constant *C, const Type *Ty);
- static Constant *getZeroExtend(Constant *C, const Type *Ty);
+
+ /// @brief Return true if this is a convert constant expression
+ bool isCast() const;
+
/// Select constant expr
///
return getSelectTy(V1->getType(), C, V1, V2);
}
+ /// getSizeOf constant expr - computes the size of a type in a target
+ /// independent way (Note: the return type is a ULong).
+ ///
+ static Constant *getSizeOf(const Type *Ty);
+
+ /// getPtrPtrFromArrayPtr constant expr - given a pointer to a constant array,
+ /// return a pointer to a pointer of the array element type.
+ static Constant *getPtrPtrFromArrayPtr(Constant *C);
/// ConstantExpr::get - Return a binary or shift operator constant expression,
/// folding if possible.
///
- static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
- return getTy(C1->getType(), Opcode, C1, C2);
- }
+ static Constant *get(unsigned Opcode, Constant *C1, Constant *C2);
/// ConstantExpr::get* - Return some common constants without having to
/// specify the full Instruction::OPCODE identifier.
static Constant *getAdd(Constant *C1, Constant *C2);
static Constant *getSub(Constant *C1, Constant *C2);
static Constant *getMul(Constant *C1, Constant *C2);
- static Constant *getDiv(Constant *C1, Constant *C2);
- static Constant *getRem(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 *getSetLE(Constant *C1, Constant *C2);
static Constant *getSetGE(Constant *C1, Constant *C2);
static Constant *getShl(Constant *C1, Constant *C2);
- static Constant *getShr(Constant *C1, Constant *C2);
-
- static Constant *getUShr(Constant *C1, Constant *C2); // unsigned shr
- static Constant *getSShr(Constant *C1, Constant *C2); // signed shr
+ static Constant *getLShr(Constant *C1, Constant *C2);
+ static Constant *getAShr(Constant *C1, Constant *C2);
- /// Getelementptr form...
+ /// Getelementptr form. std::vector<Value*> is only accepted for convenience:
+ /// all elements must be Constant's.
///
static Constant *getGetElementPtr(Constant *C,
const std::vector<Constant*> &IdxList);
+ static Constant *getGetElementPtr(Constant *C,
+ const std::vector<Value*> &IdxList);
+
+ 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);
/// 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; }
+ unsigned getOpcode() const { return SubclassData; }
/// getOpcodeName - Return a string representation for an opcode.
const char *getOpcodeName() const;
+
+ /// getWithOperandReplaced - Return a constant expression identical to this
+ /// one, but with the specified operand set to the specified value.
+ Constant *getWithOperandReplaced(unsigned OpNo, Constant *Op) const;
+
+ /// getWithOperands - This returns the current constant expression with the
+ /// operands replaced with the specified values. The specified operands must
+ /// match count and type with the existing ones.
+ Constant *getWithOperands(const std::vector<Constant*> &Ops) const;
virtual void destroyConstant();
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking = false);
-
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
+
/// Override methods to provide more type information...
- inline Constant *getOperand(unsigned i) {
+ 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; }
}
};
+
+//===----------------------------------------------------------------------===//
+/// UndefValue - 'undef' values are things that do not have specified contents.
+/// These are used for a variety of purposes, including global variable
+/// initializers and operands to instructions. 'undef' values can occur with
+/// any type.
+///
+class UndefValue : public Constant {
+ friend struct ConstantCreator<UndefValue, Type, char>;
+ UndefValue(const UndefValue &); // DO NOT IMPLEMENT
+protected:
+ UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {}
+public:
+ /// get() - Static factory methods - Return an 'undef' object of the specified
+ /// type.
+ ///
+ static UndefValue *get(const Type *T);
+
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ 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 UndefValue *) { return true; }
+ static bool classof(const Value *V) {
+ return V->getValueType() == UndefValueVal;
+ }
+};
+
} // End llvm namespace
#endif
projects / oota-llvm.git / blobdiff