//
// 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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-/// @file This file contains the declarations for the subclasses of Constant,
+/// @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
#define LLVM_CONSTANTS_H
#include "llvm/Constant.h"
-#include "llvm/Type.h"
+#include "llvm/OperandTraits.h"
+#include "llvm/ADT/APInt.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/ArrayRef.h"
namespace llvm {
class ArrayType;
+class IntegerType;
class StructType;
class PointerType;
-class PackedType;
+class VectorType;
template<class ConstantClass, class TypeClass, class ValType>
struct ConstantCreator;
struct ConvertConstantType;
//===----------------------------------------------------------------------===//
-/// 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 {
+/// This is the shared class of boolean and integer constants. This class
+/// represents both boolean and integral constants.
+/// @brief Class for constant integers.
+class ConstantInt : public Constant {
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
+ ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
+ ConstantInt(IntegerType *Ty, const APInt& V);
+ APInt Val;
protected:
- uint64_t Val;
- ConstantIntegral(const Type *Ty, ValueTy VT, uint64_t V);
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
-
- /// ConstantIntegral::get - Return a bool or integer constant.
- static ConstantIntegral *get(const Type *Ty, int64_t V);
-
+ static ConstantInt *getTrue(LLVMContext &Context);
+ static ConstantInt *getFalse(LLVMContext &Context);
+ static Constant *getTrue(Type *Ty);
+ static Constant *getFalse(Type *Ty);
+
+ /// If Ty is a vector type, return a Constant with a splat of the given
+ /// value. Otherwise return a ConstantInt for the given value.
+ static Constant *get(Type *Ty, uint64_t V, bool isSigned = false);
+
+ /// Return a ConstantInt with the specified integer value for the specified
+ /// type. If the type is wider than 64 bits, the value will be zero-extended
+ /// to fit the type, unless isSigned is true, in which case the value will
+ /// be interpreted as a 64-bit signed integer and sign-extended to fit
+ /// the type.
+ /// @brief Get a ConstantInt for a specific value.
+ static ConstantInt *get(IntegerType *Ty, uint64_t V,
+ bool isSigned = false);
+
+ /// Return a ConstantInt with the specified value for the specified type. The
+ /// value V will be canonicalized to a an unsigned APInt. Accessing it with
+ /// either getSExtValue() or getZExtValue() will yield a correctly sized and
+ /// signed value for the type Ty.
+ /// @brief Get a ConstantInt for a specific signed value.
+ static ConstantInt *getSigned(IntegerType *Ty, int64_t V);
+ static Constant *getSigned(Type *Ty, int64_t V);
+
+ /// Return a ConstantInt with the specified value and an implied Type. The
+ /// type is the integer type that corresponds to the bit width of the value.
+ static ConstantInt *get(LLVMContext &Context, const APInt &V);
+
+ /// Return a ConstantInt constructed from the string strStart with the given
+ /// radix.
+ static ConstantInt *get(IntegerType *Ty, StringRef Str,
+ uint8_t radix);
+
+ /// If Ty is a vector type, return a Constant with a splat of the given
+ /// value. Otherwise return a ConstantInt for the given value.
+ static Constant *get(Type* Ty, const APInt& V);
+
+ /// Return the constant as an APInt value reference. This allows clients to
+ /// obtain a copy of the value, with all its precision in tact.
+ /// @brief Return the constant's value.
+ inline const APInt &getValue() const {
+ return Val;
+ }
+
+ /// getBitWidth - Return the bitwidth of this constant.
+ unsigned getBitWidth() const { return Val.getBitWidth(); }
+
/// Return the constant as a 64-bit unsigned integer value after it
- /// has been zero extended as appropriate for the type of this constant.
+ /// has been zero extended as appropriate for the type of this constant. Note
+ /// that this method can assert if the value does not fit in 64 bits.
+ /// @deprecated
/// @brief Return the zero extended value.
inline uint64_t getZExtValue() const {
- return Val;
+ return Val.getZExtValue();
}
/// Return the constant as a 64-bit integer value after it has been sign
- /// sign extended as appropriate for the type of this constant.
+ /// extended as appropriate for the type of this constant. Note that
+ /// this method can assert if the value does not fit in 64 bits.
+ /// @deprecated
/// @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;
-
- /// 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(bool isSigned) const = 0;
-
- /// 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(bool isSigned) const = 0;
-
- /// 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;
-
- /// @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 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() == ConstantBoolVal ||
- V->getValueType() == ConstantIntVal;
- }
-};
-
-
-//===----------------------------------------------------------------------===//
-/// 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:
- /// 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); }
-
- /// Returns the opposite value of this ConstantBool value.
- /// @brief Get inverse value.
- inline ConstantBool *inverted() const {
- return getValue() ? getFalse() : getTrue();
- }
-
- /// @returns the value of this ConstantBool
- /// @brief return the boolean value of this constant.
- inline bool getValue() const { return static_cast<bool>(getZExtValue()); }
-
- /// @see ConstantIntegral for details
- /// @brief Implement overrides
- virtual bool isNullValue() const { return getValue() == false; }
- virtual bool isMaxValue(bool isSigned) const { return getValue() == true; }
- virtual bool isMinValue(bool isSigned) const { return getValue() == false; }
- virtual bool isAllOnesValue() const { return getValue() == true; }
-
- /// @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->getValueType() == ConstantBoolVal;
+ return Val.getSExtValue();
}
-};
-
-//===----------------------------------------------------------------------===//
-/// 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:
/// 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!");
+ bool equalsInt(uint64_t V) const {
return Val == 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);
+ /// getType - Specialize the getType() method to always return an IntegerType,
+ /// which reduces the amount of casting needed in parts of the compiler.
+ ///
+ inline IntegerType *getType() const {
+ return reinterpret_cast<IntegerType*>(Value::getType());
+ }
/// 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.
+ /// assert when V is larger than Ty can represent. Note that there are two
+ /// versions of this method, one for unsigned and one for signed integers.
+ /// Although ConstantInt canonicalizes everything to an unsigned integer,
+ /// the signed version avoids callers having to convert a signed quantity
+ /// to the appropriate unsigned type before calling the method.
/// @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);
+ static bool isValueValidForType(Type *Ty, uint64_t V);
+ static bool isValueValidForType(Type *Ty, int64_t V);
+
+ bool isNegative() const { return Val.isNegative(); }
+
+ /// This is just a convenience method to make client code smaller for a
+ /// common code. It also correctly performs the comparison without the
+ /// potential for an assertion from getZExtValue().
+ bool isZero() const {
+ return Val == 0;
+ }
- /// @returns true if this is the null integer value.
- /// @see ConstantIntegral for details
- /// @brief Implement override.
- virtual bool isNullValue() const { return Val == 0; }
+ /// This is just a convenience method to make client code smaller for a
+ /// common case. It also correctly performs the comparison without the
+ /// potential for an assertion from getZExtValue().
+ /// @brief Determine if the value is one.
+ bool isOne() const {
+ return Val == 1;
+ }
+ /// This function will return true iff every bit in this constant is set
+ /// to true.
/// @returns true iff this constant's bits are all set to true.
- /// @see ConstantIntegral
- /// @brief Override implementation
- virtual bool isAllOnesValue() const { return getSExtValue() == -1; }
+ /// @brief Determine if the value is all ones.
+ bool isMinusOne() const {
+ return Val.isAllOnesValue();
+ }
+ /// This function will return true iff this constant represents the largest
+ /// value that may be represented by the constant's type.
/// @returns true iff this is the largest value that may be represented
/// by this type.
- /// @see ConstantIntegeral
- /// @brief Override implementation
- virtual bool isMaxValue(bool isSigned) const {
- if (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();
+ /// @brief Determine if the value is maximal.
+ bool isMaxValue(bool isSigned) const {
+ if (isSigned)
+ return Val.isMaxSignedValue();
+ else
+ return Val.isMaxValue();
}
+ /// This function will return true iff this constant represents the smallest
+ /// value that may be represented by this constant's type.
/// @returns true if this is the smallest value that may be represented by
/// this type.
- /// @see ConstantIntegral
- /// @brief Override implementation
- virtual bool isMinValue(bool isSigned) const {
- if (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;
+ /// @brief Determine if the value is minimal.
+ bool isMinValue(bool isSigned) const {
+ if (isSigned)
+ return Val.isMinSignedValue();
+ else
+ return Val.isMinValue();
+ }
+
+ /// This function will return true iff this constant represents a value with
+ /// active bits bigger than 64 bits or a value greater than the given uint64_t
+ /// value.
+ /// @returns true iff this constant is greater or equal to the given number.
+ /// @brief Determine if the value is greater or equal to the given number.
+ bool uge(uint64_t Num) const {
+ return Val.getActiveBits() > 64 || Val.getZExtValue() >= Num;
+ }
+
+ /// getLimitedValue - If the value is smaller than the specified limit,
+ /// return it, otherwise return the limit value. This causes the value
+ /// to saturate to the limit.
+ /// @returns the min of the value of the constant and the specified value
+ /// @brief Get the constant's value with a saturation limit
+ uint64_t getLimitedValue(uint64_t Limit = ~0ULL) const {
+ return Val.getLimitedValue(Limit);
}
/// @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() == ConstantIntVal;
+ return V->getValueID() == ConstantIntVal;
}
};
/// 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>;
+ APFloat Val;
+ void *operator new(size_t, unsigned);// DO NOT IMPLEMENT
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
+ friend class LLVMContextImpl;
+protected:
+ ConstantFP(Type *Ty, const APFloat& V);
protected:
- ConstantFP(const Type *Ty, double V);
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
- /// get() - Static factory methods - Return objects of the specified value
- static ConstantFP *get(const Type *Ty, double V);
-
+ /// Floating point negation must be implemented with f(x) = -0.0 - x. This
+ /// method returns the negative zero constant for floating point or vector
+ /// floating point types; for all other types, it returns the null value.
+ static Constant *getZeroValueForNegation(Type *Ty);
+
+ /// get() - This returns a ConstantFP, or a vector containing a splat of a
+ /// ConstantFP, for the specified value in the specified type. This should
+ /// only be used for simple constant values like 2.0/1.0 etc, that are
+ /// known-valid both as host double and as the target format.
+ static Constant *get(Type* Ty, double V);
+ static Constant *get(Type* Ty, StringRef Str);
+ static ConstantFP *get(LLVMContext &Context, const APFloat &V);
+ static ConstantFP *getNegativeZero(Type* Ty);
+ static ConstantFP *getInfinity(Type *Ty, bool Negative = false);
+
/// 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; }
+ static bool isValueValidForType(Type *Ty, const APFloat &V);
+ inline const APFloat &getValueAPF() const { return Val; }
+
+ /// isZero - Return true if the value is positive or negative zero.
+ bool isZero() const { return Val.isZero(); }
+
+ /// isNegative - Return true if the sign bit is set.
+ bool isNegative() const { return Val.isNegative(); }
- /// 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;
+ /// isNaN - Return true if the value is a NaN.
+ bool isNaN() const { return Val.isNaN(); }
/// 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;
-
+ /// two floating point values. The version with a double operand is retained
+ /// because it's so convenient to write isExactlyValue(2.0), but please use
+ /// it only for simple constants.
+ bool isExactlyValue(const APFloat &V) const;
+
+ bool isExactlyValue(double V) const {
+ bool ignored;
+ // convert is not supported on this type
+ if (&Val.getSemantics() == &APFloat::PPCDoubleDouble)
+ return false;
+ APFloat FV(V);
+ FV.convert(Val.getSemantics(), APFloat::rmNearestTiesToEven, &ignored);
+ return isExactlyValue(FV);
+ }
/// 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() == ConstantFPVal;
+ return V->getValueID() == ConstantFPVal;
}
};
///
class ConstantAggregateZero : public Constant {
friend struct ConstantCreator<ConstantAggregateZero, Type, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
protected:
- ConstantAggregateZero(const Type *Ty)
- : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {}
+ explicit ConstantAggregateZero(Type *ty)
+ : Constant(ty, ConstantAggregateZeroVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
- /// get() - static factory method for creating a null aggregate. It is
- /// illegal to call this method with a non-aggregate type.
- static 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; }
-
+ static ConstantAggregateZero* get(Type *Ty);
+
virtual void destroyConstant();
/// Methods for support type inquiry through isa, cast, and dyn_cast:
///
static bool classof(const ConstantAggregateZero *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == ConstantAggregateZeroVal;
+ return V->getValueID() == ConstantAggregateZeroVal;
}
};
std::vector<Constant*> >;
ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
protected:
- ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
- ~ConstantArray();
+ ConstantArray(ArrayType *T, ArrayRef<Constant *> Val);
public:
- /// get() - Static factory methods - Return objects of the specified value
- static Constant *get(const ArrayType *T, const std::vector<Constant*> &);
-
+ // ConstantArray accessors
+ static Constant *get(ArrayType *T, ArrayRef<Constant*> V);
+
/// This method constructs a ConstantArray and initializes it with a text
/// string. The default behavior (AddNull==true) causes a null terminator to
/// be placed at the end of the array. This effectively increases the length
/// of the array by one (you've been warned). However, in some situations
/// this is not desired so if AddNull==false then the string is copied without
- /// null termination.
- static Constant *get(const std::string &Initializer, bool AddNull = true);
+ /// null termination.
+ static Constant *get(LLVMContext &Context, StringRef Initializer,
+ bool AddNull = true);
+
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// 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 reinterpret_cast<const ArrayType*>(Value::getType());
+ inline ArrayType *getType() const {
+ return reinterpret_cast<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.
+ /// isString - This method returns true if the array is an array of i8 and
+ /// the elements of the array are all ConstantInt's.
bool isString() const;
/// isCString - This method returns true if the array is a string (see
+ /// @verbatim
/// isString) and it ends in a null byte \0 and does not contains any other
+ /// @endverbatim
/// null bytes except its terminator.
bool isCString() const;
///
std::string getAsString() const;
- /// 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; }
+ /// getAsCString - If this array is isCString(), then this method converts the
+ /// array (without the trailing null byte) to an std::string and returns it.
+ /// Otherwise, it asserts out.
+ ///
+ std::string getAsCString() const;
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 ConstantArray *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == ConstantArrayVal;
+ return V->getValueID() == ConstantArrayVal;
}
};
+template <>
+struct OperandTraits<ConstantArray> :
+ public VariadicOperandTraits<ConstantArray> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantArray, Constant)
//===----------------------------------------------------------------------===//
// ConstantStruct - Constant Struct Declarations
std::vector<Constant*> >;
ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
protected:
- ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
- ~ConstantStruct();
+ ConstantStruct(StructType *T, ArrayRef<Constant *> Val);
public:
- /// get() - Static factory methods - Return objects of the specified value
- ///
- static Constant *get(const StructType *T, const std::vector<Constant*> &V);
- static Constant *get(const std::vector<Constant*> &V, bool packed = false);
+ // ConstantStruct accessors
+ static Constant *get(StructType *T, ArrayRef<Constant*> V);
+ static Constant *get(StructType *T, ...) END_WITH_NULL;
+
+ /// getAnon - Return an anonymous struct that has the specified
+ /// elements. If the struct is possibly empty, then you must specify a
+ /// context.
+ static Constant *getAnon(ArrayRef<Constant*> V, bool Packed = false) {
+ return get(getTypeForElements(V, Packed), V);
+ }
+ static Constant *getAnon(LLVMContext &Ctx,
+ ArrayRef<Constant*> V, bool Packed = false) {
+ return get(getTypeForElements(Ctx, V, Packed), V);
+ }
+
+ /// getTypeForElements - Return an anonymous struct type to use for a constant
+ /// with the specified set of elements. The list must not be empty.
+ static StructType *getTypeForElements(ArrayRef<Constant*> V,
+ bool Packed = false);
+ /// getTypeForElements - This version of the method allows an empty list.
+ static StructType *getTypeForElements(LLVMContext &Ctx,
+ ArrayRef<Constant*> V,
+ bool Packed = false);
+
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// getType() specialization - Reduce amount of casting...
///
- inline const StructType *getType() const {
- return reinterpret_cast<const StructType*>(Value::getType());
- }
-
- /// 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;
+ inline StructType *getType() const {
+ return reinterpret_cast<StructType*>(Value::getType());
}
virtual void destroyConstant();
/// 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() == ConstantStructVal;
+ return V->getValueID() == ConstantStructVal;
}
};
+template <>
+struct OperandTraits<ConstantStruct> :
+ public VariadicOperandTraits<ConstantStruct> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantStruct, Constant)
+
+
//===----------------------------------------------------------------------===//
-/// ConstantPacked - Constant Packed Declarations
+/// ConstantVector - Constant Vector Declarations
///
-class ConstantPacked : public Constant {
- friend struct ConstantCreator<ConstantPacked, PackedType,
+class ConstantVector : public Constant {
+ friend struct ConstantCreator<ConstantVector, VectorType,
std::vector<Constant*> >;
- ConstantPacked(const ConstantPacked &); // DO NOT IMPLEMENT
+ ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT
protected:
- ConstantPacked(const PackedType *T, const std::vector<Constant*> &Val);
- ~ConstantPacked();
+ ConstantVector(VectorType *T, ArrayRef<Constant *> Val);
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);
+ // ConstantVector accessors
+ static Constant *get(ArrayRef<Constant*> V);
+
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
- /// getType - Specialize the getType() method to always return an PackedType,
+ /// getType - Specialize the getType() method to always return a VectorType,
/// which reduces the amount of casting needed in parts of the compiler.
///
- inline const PackedType *getType() const {
- return reinterpret_cast<const PackedType*>(Value::getType());
+ inline VectorType *getType() const {
+ return reinterpret_cast<VectorType*>(Value::getType());
}
+
+ /// This function will return true iff every element in this vector constant
+ /// is set to all ones.
+ /// @returns true iff this constant's emements are all set to all ones.
+ /// @brief Determine if the value is all ones.
+ bool isAllOnesValue() const;
- /// 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; }
+ /// getSplatValue - If this is a splat constant, meaning that all of the
+ /// elements have the same value, return that value. Otherwise return NULL.
+ Constant *getSplatValue() const;
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 inline bool classof(const ConstantVector *) { return true; }
static bool classof(const Value *V) {
- return V->getValueType() == ConstantPackedVal;
+ return V->getValueID() == ConstantVectorVal;
}
};
+template <>
+struct OperandTraits<ConstantVector> :
+ public VariadicOperandTraits<ConstantVector> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantVector, Constant)
+
//===----------------------------------------------------------------------===//
/// ConstantPointerNull - a constant pointer value that points to null
///
class ConstantPointerNull : public Constant {
friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
- ConstantPointerNull(const PointerType *T)
- : Constant(reinterpret_cast<const Type*>(T),
+ explicit ConstantPointerNull(PointerType *T)
+ : Constant(reinterpret_cast<Type*>(T),
Value::ConstantPointerNullVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
-
/// get() - Static factory methods - Return objects of the specified value
- static ConstantPointerNull *get(const PointerType *T);
-
- /// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue.
- virtual bool isNullValue() const { return true; }
+ static ConstantPointerNull *get(PointerType *T);
virtual void destroyConstant();
/// getType - Specialize the getType() method to always return an PointerType,
/// which reduces the amount of casting needed in parts of the compiler.
///
- inline const PointerType *getType() const {
- return reinterpret_cast<const PointerType*>(Value::getType());
+ inline PointerType *getType() const {
+ return reinterpret_cast<PointerType*>(Value::getType());
}
/// 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() == ConstantPointerNullVal;
+ return V->getValueID() == ConstantPointerNullVal;
}
};
+/// BlockAddress - The address of a basic block.
+///
+class BlockAddress : public Constant {
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
+ void *operator new(size_t s) { return User::operator new(s, 2); }
+ BlockAddress(Function *F, BasicBlock *BB);
+public:
+ /// get - Return a BlockAddress for the specified function and basic block.
+ static BlockAddress *get(Function *F, BasicBlock *BB);
+
+ /// get - Return a BlockAddress for the specified basic block. The basic
+ /// block must be embedded into a function.
+ static BlockAddress *get(BasicBlock *BB);
+
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
+
+ Function *getFunction() const { return (Function*)Op<0>().get(); }
+ BasicBlock *getBasicBlock() const { return (BasicBlock*)Op<1>().get(); }
+
+ 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 BlockAddress *) { return true; }
+ static inline bool classof(const Value *V) {
+ return V->getValueID() == BlockAddressVal;
+ }
+};
+
+template <>
+struct OperandTraits<BlockAddress> :
+ public FixedNumOperandTraits<BlockAddress, 2> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BlockAddress, Value)
+
+//===----------------------------------------------------------------------===//
/// ConstantExpr - a constant value that is initialized with an expression using
/// other constant values.
///
friend struct ConvertConstantType<ConstantExpr, Type>;
protected:
- ConstantExpr(const Type *Ty, unsigned Opcode, Use *Ops, unsigned NumOps)
- : Constant(Ty, ConstantExprVal, Ops, NumOps) {
+ ConstantExpr(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 *getTy(const Type *Ty, unsigned Opcode,
- Constant *C1, Constant *C2);
- static Constant *getCompareTy(unsigned Opcode, unsigned short pred,
- Constant *C1, Constant *C2);
- static Constant *getShiftTy(const Type *Ty,
- unsigned Opcode, Constant *C1, Constant *C2);
- static Constant *getSelectTy(const Type *Ty,
- Constant *C1, Constant *C2, Constant *C3);
- static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
- 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);
+ setValueSubclassData(Opcode);
+ }
public:
// Static methods to construct a ConstantExpr of different kinds. Note that
// ConstantExpr class, because they will attempt to fold the constant
// expression into something simpler if possible.
- /// Cast constant expr
+ /// getAlignOf constant expr - computes the alignment of a type in a target
+ /// independent way (Note: the return type is an i64).
+ static Constant *getAlignOf(Type *Ty);
+
+ /// getSizeOf constant expr - computes the (alloc) size of a type (in
+ /// address-units, not bits) in a target independent way (Note: the return
+ /// type is an i64).
+ ///
+ static Constant *getSizeOf(Type *Ty);
+
+ /// getOffsetOf constant expr - computes the offset of a struct field in a
+ /// target independent way (Note: the return type is an i64).
///
- 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);
+ static Constant *getOffsetOf(StructType *STy, unsigned FieldNo);
+
+ /// getOffsetOf constant expr - This is a generalized form of getOffsetOf,
+ /// which supports any aggregate type, and any Constant index.
+ ///
+ static Constant *getOffsetOf(Type *Ty, Constant *FieldNo);
+
+ static Constant *getNeg(Constant *C, bool HasNUW = false, bool HasNSW =false);
+ static Constant *getFNeg(Constant *C);
+ static Constant *getNot(Constant *C);
+ static Constant *getAdd(Constant *C1, Constant *C2,
+ bool HasNUW = false, bool HasNSW = false);
+ static Constant *getFAdd(Constant *C1, Constant *C2);
+ static Constant *getSub(Constant *C1, Constant *C2,
+ bool HasNUW = false, bool HasNSW = false);
+ static Constant *getFSub(Constant *C1, Constant *C2);
+ static Constant *getMul(Constant *C1, Constant *C2,
+ bool HasNUW = false, bool HasNSW = false);
+ static Constant *getFMul(Constant *C1, Constant *C2);
+ static Constant *getUDiv(Constant *C1, Constant *C2, bool isExact = false);
+ static Constant *getSDiv(Constant *C1, Constant *C2, bool isExact = false);
+ static Constant *getFDiv(Constant *C1, Constant *C2);
+ static Constant *getURem(Constant *C1, Constant *C2);
+ static Constant *getSRem(Constant *C1, Constant *C2);
+ static Constant *getFRem(Constant *C1, Constant *C2);
+ static Constant *getAnd(Constant *C1, Constant *C2);
+ static Constant *getOr(Constant *C1, Constant *C2);
+ static Constant *getXor(Constant *C1, Constant *C2);
+ static Constant *getShl(Constant *C1, Constant *C2,
+ bool HasNUW = false, bool HasNSW = false);
+ static Constant *getLShr(Constant *C1, Constant *C2, bool isExact = false);
+ static Constant *getAShr(Constant *C1, Constant *C2, bool isExact = false);
+ static Constant *getTrunc (Constant *C, Type *Ty);
+ static Constant *getSExt (Constant *C, Type *Ty);
+ static Constant *getZExt (Constant *C, Type *Ty);
+ static Constant *getFPTrunc (Constant *C, Type *Ty);
+ static Constant *getFPExtend(Constant *C, Type *Ty);
+ static Constant *getUIToFP (Constant *C, Type *Ty);
+ static Constant *getSIToFP (Constant *C, Type *Ty);
+ static Constant *getFPToUI (Constant *C, Type *Ty);
+ static Constant *getFPToSI (Constant *C, Type *Ty);
+ static Constant *getPtrToInt(Constant *C, Type *Ty);
+ static Constant *getIntToPtr(Constant *C, Type *Ty);
+ static Constant *getBitCast (Constant *C, Type *Ty);
+
+ static Constant *getNSWNeg(Constant *C) { return getNeg(C, false, true); }
+ static Constant *getNUWNeg(Constant *C) { return getNeg(C, true, false); }
+ static Constant *getNSWAdd(Constant *C1, Constant *C2) {
+ return getAdd(C1, C2, false, true);
+ }
+ static Constant *getNUWAdd(Constant *C1, Constant *C2) {
+ return getAdd(C1, C2, true, false);
+ }
+ static Constant *getNSWSub(Constant *C1, Constant *C2) {
+ return getSub(C1, C2, false, true);
+ }
+ static Constant *getNUWSub(Constant *C1, Constant *C2) {
+ return getSub(C1, C2, true, false);
+ }
+ static Constant *getNSWMul(Constant *C1, Constant *C2) {
+ return getMul(C1, C2, false, true);
+ }
+ static Constant *getNUWMul(Constant *C1, Constant *C2) {
+ return getMul(C1, C2, true, false);
+ }
+ static Constant *getNSWShl(Constant *C1, Constant *C2) {
+ return getShl(C1, C2, false, true);
+ }
+ static Constant *getNUWShl(Constant *C1, Constant *C2) {
+ return getShl(C1, C2, true, false);
+ }
+ static Constant *getExactSDiv(Constant *C1, Constant *C2) {
+ return getSDiv(C1, C2, true);
+ }
+ static Constant *getExactUDiv(Constant *C1, Constant *C2) {
+ return getUDiv(C1, C2, true);
+ }
+ static Constant *getExactAShr(Constant *C1, Constant *C2) {
+ return getAShr(C1, C2, true);
+ }
+ static Constant *getExactLShr(Constant *C1, Constant *C2) {
+ return getLShr(C1, C2, true);
+ }
+
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
// @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
+ Type *Ty ///< The type to which the constant is converted
);
// @brief Create a ZExt or BitCast cast constant expression
static Constant *getZExtOrBitCast(
Constant *C, ///< The constant to zext or bitcast
- const Type *Ty ///< The type to zext or bitcast C to
+ Type *Ty ///< The type to zext or bitcast C to
);
// @brief Create a SExt or BitCast cast constant expression
static Constant *getSExtOrBitCast(
Constant *C, ///< The constant to sext or bitcast
- const Type *Ty ///< The type to sext or bitcast C to
+ Type *Ty ///< The type to sext or bitcast C to
);
// @brief Create a Trunc or BitCast cast constant expression
static Constant *getTruncOrBitCast(
Constant *C, ///< The constant to trunc or bitcast
- const Type *Ty ///< The type to trunc or bitcast C to
+ Type *Ty ///< The type to trunc or bitcast C to
);
/// @brief Create a BitCast or a PtrToInt cast constant expression
static Constant *getPointerCast(
Constant *C, ///< The pointer value to be casted (operand 0)
- const Type *Ty ///< The type to which cast should be made
+ Type *Ty ///< The type to which cast should be made
);
/// @brief Create a ZExt, Bitcast or Trunc for integer -> integer casts
static Constant *getIntegerCast(
Constant *C, ///< The integer constant to be casted
- const Type *Ty, ///< The integer type to cast to
+ Type *Ty, ///< The integer type to cast to
bool isSigned ///< Whether C should be treated as signed or not
);
/// @brief Create a FPExt, Bitcast or FPTrunc for fp -> fp casts
static Constant *getFPCast(
Constant *C, ///< The integer constant to be casted
- const Type *Ty ///< The integer type to cast to
+ Type *Ty ///< The integer type to cast to
);
- static Constant *getCast(Constant *C, const Type *Ty);
-
/// @brief Return true if this is a convert constant expression
bool isCast() const;
/// @brief Return true if this is a compare constant expression
bool isCompare() const;
- /// Select constant expr
- ///
- static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) {
- return getSelectTy(V1->getType(), C, V1, V2);
- }
+ /// @brief Return true if this is an insertvalue or extractvalue expression,
+ /// and the getIndices() method may be used.
+ bool hasIndices() const;
- /// 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);
+ /// @brief Return true if this is a getelementptr expression and all
+ /// the index operands are compile-time known integers within the
+ /// corresponding notional static array extents. Note that this is
+ /// not equivalant to, a subset of, or a superset of the "inbounds"
+ /// property.
+ bool isGEPWithNoNotionalOverIndexing() const;
- /// 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);
+ /// Select constant expr
+ ///
+ static Constant *getSelect(Constant *C, Constant *V1, Constant *V2);
- /// ConstantExpr::get - Return a binary or shift operator constant expression,
+ /// get - Return a binary or shift operator constant expression,
/// folding if possible.
///
- static Constant *get(unsigned Opcode, Constant *C1, Constant *C2);
+ static Constant *get(unsigned Opcode, Constant *C1, Constant *C2,
+ unsigned Flags = 0);
/// @brief Return an ICmp or FCmp comparison operator constant expression.
- static Constant *getCompare(unsigned Opcode, unsigned short pred,
- Constant *C1, Constant *C2);
+ static Constant *getCompare(unsigned short pred, Constant *C1, Constant *C2);
- /// ConstantExpr::get* - Return some common constants without having to
+ /// get* - Return some common constants without having to
/// specify the full Instruction::OPCODE identifier.
///
- static Constant *getNeg(Constant *C);
- static Constant *getNot(Constant *C);
- static Constant *getAdd(Constant *C1, Constant *C2);
- static Constant *getSub(Constant *C1, Constant *C2);
- static Constant *getMul(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 *getSetEQ(Constant *C1, Constant *C2);
- static Constant *getSetNE(Constant *C1, Constant *C2);
- static Constant *getSetLT(Constant *C1, Constant *C2);
- static Constant *getSetGT(Constant *C1, Constant *C2);
- static Constant *getSetLE(Constant *C1, Constant *C2);
- static Constant *getSetGE(Constant *C1, Constant *C2);
- static Constant* getICmp(unsigned short pred, Constant* LHS, Constant* RHS);
- static Constant* getFCmp(unsigned short pred, Constant* LHS, Constant* RHS);
- static Constant *getShl(Constant *C1, Constant *C2);
- static Constant *getLShr(Constant *C1, Constant *C2);
- static Constant *getAShr(Constant *C1, Constant *C2);
-
- /// Getelementptr form. std::vector<Value*> is only accepted for convenience:
+ static Constant *getICmp(unsigned short pred, Constant *LHS, Constant *RHS);
+ static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS);
+
+ /// Getelementptr form. Value* is only accepted for convenience;
/// all elements must be Constant's.
///
static Constant *getGetElementPtr(Constant *C,
- const std::vector<Constant*> &IdxList);
+ ArrayRef<Constant *> IdxList,
+ bool InBounds = false) {
+ return getGetElementPtr(C, makeArrayRef((Value * const *)IdxList.data(),
+ IdxList.size()),
+ InBounds);
+ }
+ static Constant *getGetElementPtr(Constant *C,
+ Constant *Idx,
+ bool InBounds = false) {
+ // This form of the function only exists to avoid ambiguous overload
+ // warnings about whether to convert Idx to ArrayRef<Constant *> or
+ // ArrayRef<Value *>.
+ return getGetElementPtr(C, cast<Value>(Idx), InBounds);
+ }
static Constant *getGetElementPtr(Constant *C,
- const std::vector<Value*> &IdxList);
+ ArrayRef<Value *> IdxList,
+ bool InBounds = false);
+
+ /// Create an "inbounds" getelementptr. See the documentation for the
+ /// "inbounds" flag in LangRef.html for details.
+ static Constant *getInBoundsGetElementPtr(Constant *C,
+ ArrayRef<Constant *> IdxList) {
+ return getGetElementPtr(C, IdxList, true);
+ }
+ static Constant *getInBoundsGetElementPtr(Constant *C,
+ Constant *Idx) {
+ // This form of the function only exists to avoid ambiguous overload
+ // warnings about whether to convert Idx to ArrayRef<Constant *> or
+ // ArrayRef<Value *>.
+ return getGetElementPtr(C, Idx, true);
+ }
+ static Constant *getInBoundsGetElementPtr(Constant *C,
+ ArrayRef<Value *> IdxList) {
+ return getGetElementPtr(C, IdxList, true);
+ }
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; }
+ static Constant *getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs);
+ static Constant *getInsertValue(Constant *Agg, Constant *Val,
+ ArrayRef<unsigned> Idxs);
/// getOpcode - Return the opcode at the root of this constant expression
- unsigned getOpcode() const { return SubclassData; }
+ unsigned getOpcode() const { return getSubclassDataFromValue(); }
/// getPredicate - Return the ICMP or FCMP predicate value. Assert if this is
/// not an ICMP or FCMP constant expression.
unsigned getPredicate() const;
+ /// getIndices - Assert that this is an insertvalue or exactvalue
+ /// expression and return the list of indices.
+ ArrayRef<unsigned> getIndices() const;
+
/// getOpcodeName - Return a string representation for an opcode.
const char *getOpcodeName() const;
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, Use *U);
-
- /// 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)));
+ /// operands replaced with the specified values. The specified array must
+ /// have the same number of operands as our current one.
+ Constant *getWithOperands(ArrayRef<Constant*> Ops) const {
+ return getWithOperands(Ops, getType());
}
+ /// getWithOperands - This returns the current constant expression with the
+ /// operands replaced with the specified values and with the specified result
+ /// type. The specified array must have the same number of operands as our
+ /// current one.
+ Constant *getWithOperands(ArrayRef<Constant*> Ops, Type *Ty) const;
+
+ 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 ConstantExpr *) { return true; }
static inline bool classof(const Value *V) {
- return V->getValueType() == ConstantExprVal;
+ return V->getValueID() == ConstantExprVal;
+ }
+
+private:
+ // Shadow Value::setValueSubclassData with a private forwarding method so that
+ // subclasses cannot accidentally use it.
+ void setValueSubclassData(unsigned short D) {
+ Value::setValueSubclassData(D);
}
};
+template <>
+struct OperandTraits<ConstantExpr> :
+ public VariadicOperandTraits<ConstantExpr, 1> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantExpr, Constant)
//===----------------------------------------------------------------------===//
/// 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.
+/// any first-class type.
+///
+/// Undef values aren't exactly constants; if they have multiple uses, they
+/// can appear to have different bit patterns at each use. See
+/// LangRef.html#undefvalues for details.
///
class UndefValue : public Constant {
friend struct ConstantCreator<UndefValue, Type, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
UndefValue(const UndefValue &); // DO NOT IMPLEMENT
protected:
- UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {}
+ explicit UndefValue(Type *T) : Constant(T, UndefValueVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
/// get() - Static factory methods - Return 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; }
+ static UndefValue *get(Type *T);
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;
+ return V->getValueID() == UndefValueVal;
}
};
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