//
//===----------------------------------------------------------------------===//
//
-/// @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/SmallVector.h"
+#include <vector>
namespace llvm {
class ArrayType;
+class IntegerType;
class StructType;
class PointerType;
class VectorType;
struct ConstantCreator;
template<class ConstantClass, class TypeClass>
struct ConvertConstantType;
+template<typename T, unsigned N>
+class SmallVector;
//===----------------------------------------------------------------------===//
/// 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 {
- static ConstantInt *TheTrueVal, *TheFalseVal;
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
ConstantInt(const IntegerType *Ty, const APInt& V);
return User::operator new(s, 0);
}
public:
+ static ConstantInt *getTrue(LLVMContext &Context);
+ static ConstantInt *getFalse(LLVMContext &Context);
+
+ /// 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(const 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(const 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(const IntegerType *Ty, int64_t V);
+ static Constant *getSigned(const 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(const 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(const 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 {
+ inline const APInt &getValue() const {
return Val;
}
}
/// Return the constant as a 64-bit integer value after it has been sign
- /// sign extended as appropriate for the type of this constant. Note that
+ /// 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.
return Val == V;
}
- /// getTrue/getFalse - Return the singleton true/false values.
- static inline ConstantInt *getTrue() {
- if (TheTrueVal) return TheTrueVal;
- return CreateTrueFalseVals(true);
- }
- static inline ConstantInt *getFalse() {
- if (TheFalseVal) return TheFalseVal;
- return CreateTrueFalseVals(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 value.
- static ConstantInt *get(const Type *Ty, uint64_t V, bool isSigned = false);
-
- /// 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(const APInt &V);
-
/// getType - Specialize the getType() method to always return an IntegerType,
/// which reduces the amount of casting needed in parts of the compiler.
///
return Val.getActiveBits() > 64 || Val.getZExtValue() >= Num;
}
- /// @returns the 64-bit value of this constant if its active bits number is
- /// not greater than 64, otherwise, just return the given uint64_t number.
- /// @brief Get the constant's value if possible.
+ /// 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);
}
- /// @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 ConstantInt *getAllOnesValue(const Type *Ty);
-
/// @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->getValueID() == ConstantIntVal;
}
- static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; }
-private:
- static ConstantInt *CreateTrueFalseVals(bool WhichOne);
};
APFloat Val;
void *operator new(size_t, unsigned);// DO NOT IMPLEMENT
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
+ friend class LLVMContextImpl;
protected:
ConstantFP(const Type *Ty, const APFloat& V);
protected:
return User::operator new(s, 0);
}
public:
- /// get() - Static factory methods - Return objects of the specified value
- static ConstantFP *get(const APFloat &V);
-
- /// get() - This returns a constant fp 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 double and as the target format.
- 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(const 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(const Type* Ty, double V);
+ static Constant *get(const Type* Ty, StringRef Str);
+ static ConstantFP *get(LLVMContext &Context, const APFloat &V);
+ static ConstantFP *getNegativeZero(const Type* Ty);
+ static ConstantFP *getInfinity(const Type *Ty, bool Negative = false);
+
/// isValueValidForType - return true if Ty is big enough to represent V.
- static bool isValueValidForType(const Type *Ty, const APFloat& V);
+ static bool isValueValidForType(const Type *Ty, const APFloat &V);
inline const APFloat& getValueAPF() const { return Val; }
/// 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;
+
+ /// isNegativeZeroValue - Return true if the value is what would be returned
+ /// by getZeroValueForNegation.
+ virtual bool isNegativeZeroValue() const {
+ return Val.isZero() && Val.isNegative();
+ }
- // Get a negative zero.
- static ConstantFP *getNegativeZero(const Type* Ty);
+ /// isZero - Return true if the value is positive or negative zero.
+ bool isZero() const { return Val.isZero(); }
+
+ /// 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.
/// 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(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);
+ FV.convert(Val.getSemantics(), APFloat::rmNearestTiesToEven, &ignored);
return isExactlyValue(FV);
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
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);
-
+ static ConstantAggregateZero* get(const Type *Ty);
+
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return true; }
protected:
ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
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 ArrayType *T,
- Constant*const*Vals, unsigned NumVals) {
- // FIXME: make this the primary ctor method.
- return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
- }
-
+ // ConstantArray accessors
+ static Constant *get(const ArrayType *T, const std::vector<Constant*> &V);
+ static Constant *get(const ArrayType *T, Constant *const *Vals,
+ unsigned NumVals);
+
/// 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);
};
template <>
-struct OperandTraits<ConstantArray> : VariadicOperandTraits<> {
+struct OperandTraits<ConstantArray> : public VariadicOperandTraits<> {
};
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantArray, Constant)
protected:
ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
public:
- /// get() - Static factory methods - Return objects of the specified value
- ///
+ // ConstantStruct accessors
static Constant *get(const StructType *T, const std::vector<Constant*> &V);
- static Constant *get(const std::vector<Constant*> &V, bool Packed = false);
- static Constant *get(Constant*const* Vals, unsigned NumVals,
- bool Packed = false) {
- // FIXME: make this the primary ctor method.
- return get(std::vector<Constant*>(Vals, Vals+NumVals), Packed);
- }
-
+ static Constant *get(LLVMContext &Context,
+ const std::vector<Constant*> &V, bool Packed);
+ static Constant *get(LLVMContext &Context,
+ Constant *const *Vals, unsigned NumVals, bool Packed);
+
/// Transparently provide more efficient getOperand methods.
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
};
template <>
-struct OperandTraits<ConstantStruct> : VariadicOperandTraits<> {
+struct OperandTraits<ConstantStruct> : public VariadicOperandTraits<> {
};
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant)
+
//===----------------------------------------------------------------------===//
/// ConstantVector - Constant Vector Declarations
///
protected:
ConstantVector(const VectorType *T, const std::vector<Constant*> &Val);
public:
- /// get() - Static factory methods - Return objects of the specified value
- static Constant *get(const VectorType *T, const std::vector<Constant*> &);
+ // ConstantVector accessors
+ static Constant *get(const VectorType *T, const std::vector<Constant*> &V);
static Constant *get(const std::vector<Constant*> &V);
- static Constant *get(Constant*const* Vals, unsigned NumVals) {
- // FIXME: make this the primary ctor method.
- return get(std::vector<Constant*>(Vals, Vals+NumVals));
- }
+ static Constant *get(Constant *const *Vals, unsigned NumVals);
/// Transparently provide more efficient getOperand methods.
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
inline const VectorType *getType() const {
return reinterpret_cast<const VectorType*>(Value::getType());
}
-
- /// @returns the value for a vector integer constant of the given type that
- /// has all its bits set to true.
- /// @brief Get the all ones value
- static ConstantVector *getAllOnesValue(const VectorType *Ty);
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. This always returns false because zero vectors are always
};
template <>
-struct OperandTraits<ConstantVector> : VariadicOperandTraits<> {
+struct OperandTraits<ConstantVector> : public VariadicOperandTraits<> {
};
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantVector, Constant)
}
};
+/// 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(); }
+
+ /// 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, 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<2> {
+};
+
+DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(BlockAddress, Value)
+
+//===----------------------------------------------------------------------===//
/// ConstantExpr - a constant value that is initialized with an expression using
/// other constant values.
///
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;
+ setValueSubclassData(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);
+ Constant *C1, Constant *C2,
+ unsigned Flags = 0);
static Constant *getCompareTy(unsigned short pred, Constant *C1,
Constant *C2);
static Constant *getSelectTy(const Type *Ty,
Constant *C1, Constant *C2, Constant *C3);
static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
Value* const *Idxs, unsigned NumIdxs);
+ static Constant *getInBoundsGetElementPtrTy(const Type *Ty, Constant *C,
+ Value* const *Idxs,
+ unsigned NumIdxs);
static Constant *getExtractElementTy(const Type *Ty, Constant *Val,
Constant *Idx);
static Constant *getInsertElementTy(const Type *Ty, Constant *Val,
// 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(const 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(const 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 *getOffsetOf(const 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(const Type* Ty, Constant *FieldNo);
+
+ static Constant *getNeg(Constant *C);
+ static Constant *getFNeg(Constant *C);
+ static Constant *getNot(Constant *C);
+ static Constant *getAdd(Constant *C1, Constant *C2);
+ static Constant *getFAdd(Constant *C1, Constant *C2);
+ static Constant *getSub(Constant *C1, Constant *C2);
+ static Constant *getFSub(Constant *C1, Constant *C2);
+ static Constant *getMul(Constant *C1, Constant *C2);
+ static Constant *getFMul(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);
+ 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);
+ static Constant *getLShr(Constant *C1, Constant *C2);
+ static Constant *getAShr(Constant *C1, Constant *C2);
static Constant *getTrunc (Constant *C, const Type *Ty);
static Constant *getSExt (Constant *C, const Type *Ty);
static Constant *getZExt (Constant *C, const Type *Ty);
static Constant *getIntToPtr(Constant *C, const Type *Ty);
static Constant *getBitCast (Constant *C, const Type *Ty);
+ static Constant *getNSWNeg(Constant *C);
+ static Constant *getNUWNeg(Constant *C);
+ static Constant *getNSWAdd(Constant *C1, Constant *C2);
+ static Constant *getNUWAdd(Constant *C1, Constant *C2);
+ static Constant *getNSWSub(Constant *C1, Constant *C2);
+ static Constant *getNUWSub(Constant *C1, Constant *C2);
+ static Constant *getNSWMul(Constant *C1, Constant *C2);
+ static Constant *getNUWMul(Constant *C1, Constant *C2);
+ static Constant *getExactSDiv(Constant *C1, Constant *C2);
+
/// Transparently provide more efficient getOperand methods.
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// and the getIndices() method may be used.
bool hasIndices() const;
+ /// @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;
+
/// Select constant expr
///
static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) {
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 an i64).
- ///
- static Constant *getSizeOf(const Type *Ty);
-
- /// 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, FCmp, VICmp, or VFCmp comparison operator constant
- /// expression.
+ /// @brief Return an ICmp or FCmp comparison operator constant expression.
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 *getICmp(unsigned short pred, Constant *LHS, Constant *RHS);
static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS);
- static Constant *getVICmp(unsigned short pred, Constant *LHS, Constant *RHS);
- static Constant *getVFCmp(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:
/// all elements must be Constant's.
///
static Constant *getGetElementPtr(Constant *C,
- Constant* const *IdxList, unsigned NumIdx);
+ Constant *const *IdxList, unsigned NumIdx);
static Constant *getGetElementPtr(Constant *C,
Value* const *IdxList, unsigned NumIdx);
-
+
+ /// Create an "inbounds" getelementptr. See the documentation for the
+ /// "inbounds" flag in LangRef.html for details.
+ static Constant *getInBoundsGetElementPtr(Constant *C,
+ Constant *const *IdxList,
+ unsigned NumIdx);
+ static Constant *getInBoundsGetElementPtr(Constant *C,
+ Value* const *IdxList,
+ unsigned NumIdx);
+
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);
static Constant *getInsertValue(Constant *Agg, Constant *Val,
const unsigned *IdxList, unsigned NumIdx);
- /// 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 *getZeroValueForNegationExpr(const Type *Ty);
-
/// 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 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.
Constant *getWithOperands(const std::vector<Constant*> &Ops) const {
return getWithOperands(&Ops[0], (unsigned)Ops.size());
}
- Constant *getWithOperands(Constant* const *Ops, unsigned NumOps) const;
+ Constant *getWithOperands(Constant *const *Ops, unsigned NumOps) const;
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
static inline bool classof(const Value *V) {
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> : VariadicOperandTraits<1> {
+struct OperandTraits<ConstantExpr> : public VariadicOperandTraits<1> {
};
DEFINE_TRANSPARENT_CASTED_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>;
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