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//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// 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,
/// 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.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CONSTANTS_H
#define LLVM_CONSTANTS_H
#include "llvm/Constant.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 VectorType;
class SequentialType;
template<class ConstantClass, class TypeClass, class ValType>
struct ConstantCreator;
template<class ConstantClass, class TypeClass>
struct ConstantArrayCreator;
template<class ConstantClass, class TypeClass>
struct ConvertConstantType;
//===----------------------------------------------------------------------===//
/// 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 {
virtual void anchor();
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
ConstantInt(IntegerType *Ty, const APInt& V);
APInt Val;
protected:
// allocate space for exactly zero operands
void *operator new(size_t s) {
return User::operator new(s, 0);
}
public:
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. 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.getZExtValue();
}
/// Return the constant as a 64-bit integer value after it has been sign
/// 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 {
return Val.getSExtValue();
}
/// 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(uint64_t V) const {
return Val == 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. 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(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;
}
/// 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.
/// @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.
/// @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.
/// @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->getValueID() == ConstantIntVal;
}
};
//===----------------------------------------------------------------------===//
/// ConstantFP - Floating Point Values [float, double]
///
class ConstantFP : public Constant {
APFloat Val;
virtual void anchor();
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:
// allocate space for exactly zero operands
void *operator new(size_t s) {
return User::operator new(s, 0);
}
public:
/// 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(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(); }
/// 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. 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->getValueID() == ConstantFPVal;
}
};
//===----------------------------------------------------------------------===//
/// ConstantAggregateZero - All zero aggregate value
///
class ConstantAggregateZero : public Constant {
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
protected:
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:
static ConstantAggregateZero *get(Type *Ty);
virtual void destroyConstant();
/// getSequentialElement - If this CAZ has array or vector type, return a zero
/// with the right element type.
Constant *getSequentialElement() const;
/// getStructElement - If this CAZ has struct type, return a zero with the
/// right element type for the specified element.
Constant *getStructElement(unsigned Elt) const;
/// getElementValue - Return a zero of the right value for the specified GEP
/// index.
Constant *getElementValue(Constant *C) const;
/// getElementValue - Return a zero of the right value for the specified GEP
/// index.
Constant *getElementValue(unsigned Idx) const;
/// 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->getValueID() == ConstantAggregateZeroVal;
}
};
//===----------------------------------------------------------------------===//
/// ConstantArray - Constant Array Declarations
///
class ConstantArray : public Constant {
friend struct ConstantArrayCreator<ConstantArray, ArrayType>;
ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
protected:
ConstantArray(ArrayType *T, ArrayRef<Constant *> Val);
public:
// ConstantArray accessors
static Constant *get(ArrayType *T, ArrayRef<Constant*> V);
/// 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 ArrayType *getType() const {
return reinterpret_cast<ArrayType*>(Value::getType());
}
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->getValueID() == ConstantArrayVal;
}
};
template <>
struct OperandTraits<ConstantArray> :
public VariadicOperandTraits<ConstantArray> {
};
DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantArray, Constant)
//===----------------------------------------------------------------------===//
// ConstantStruct - Constant Struct Declarations
//
class ConstantStruct : public Constant {
friend struct ConstantArrayCreator<ConstantStruct, StructType>;
ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
protected:
ConstantStruct(StructType *T, ArrayRef<Constant *> Val);
public:
// 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 StructType *getType() const {
return reinterpret_cast<StructType*>(Value::getType());
}
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 ConstantStruct *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == ConstantStructVal;
}
};
template <>
struct OperandTraits<ConstantStruct> :
public VariadicOperandTraits<ConstantStruct> {
};
DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantStruct, Constant)
//===----------------------------------------------------------------------===//
/// ConstantVector - Constant Vector Declarations
///
class ConstantVector : public Constant {
friend struct ConstantArrayCreator<ConstantVector, VectorType>;
ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT
protected:
ConstantVector(VectorType *T, ArrayRef<Constant *> Val);
public:
// ConstantVector accessors
static Constant *get(ArrayRef<Constant*> V);
/// getSplat - Return a ConstantVector with the specified constant in each
/// element.
static Constant *getSplat(unsigned NumElts, Constant *Elt);
/// Transparently provide more efficient getOperand methods.
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// getType - Specialize the getType() method to always return a VectorType,
/// which reduces the amount of casting needed in parts of the compiler.
///
inline VectorType *getType() const {
return reinterpret_cast<VectorType*>(Value::getType());
}
/// 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 ConstantVector *) { return true; }
static bool classof(const Value *V) {
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 {
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
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(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 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->getValueID() == ConstantPointerNullVal;
}
};
//===----------------------------------------------------------------------===//
/// ConstantDataSequential - A vector or array constant whose element type is a
/// simple 1/2/4/8-byte integer or float/double, and whose elements are just
/// simple data values (i.e. ConstantInt/ConstantFP). This Constant node has no
/// operands because it stores all of the elements of the constant as densely
/// packed data, instead of as Value*'s.
///
/// This is the common base class of ConstantDataArray and ConstantDataVector.
///
class ConstantDataSequential : public Constant {
friend class LLVMContextImpl;
/// DataElements - A pointer to the bytes underlying this constant (which is
/// owned by the uniquing StringMap).
const char *DataElements;
/// Next - This forms a link list of ConstantDataSequential nodes that have
/// the same value but different type. For example, 0,0,0,1 could be a 4
/// element array of i8, or a 1-element array of i32. They'll both end up in
/// the same StringMap bucket, linked up.
ConstantDataSequential *Next;
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantDataSequential(const ConstantDataSequential &); // DO NOT IMPLEMENT
protected:
explicit ConstantDataSequential(Type *ty, ValueTy VT, const char *Data)
: Constant(ty, VT, 0, 0), DataElements(Data), Next(0) {}
~ConstantDataSequential() { delete Next; }
static Constant *getImpl(StringRef Bytes, Type *Ty);
protected:
// allocate space for exactly zero operands.
void *operator new(size_t s) {
return User::operator new(s, 0);
}
public:
/// isElementTypeCompatible - Return true if a ConstantDataSequential can be
/// formed with a vector or array of the specified element type.
/// ConstantDataArray only works with normal float and int types that are
/// stored densely in memory, not with things like i42 or x86_f80.
static bool isElementTypeCompatible(const Type *Ty);
/// getElementAsInteger - If this is a sequential container of integers (of
/// any size), return the specified element in the low bits of a uint64_t.
uint64_t getElementAsInteger(unsigned i) const;
/// getElementAsAPFloat - If this is a sequential container of floating point
/// type, return the specified element as an APFloat.
APFloat getElementAsAPFloat(unsigned i) const;
/// getElementAsFloat - If this is an sequential container of floats, return
/// the specified element as a float.
float getElementAsFloat(unsigned i) const;
/// getElementAsDouble - If this is an sequential container of doubles, return
/// the specified element as a double.
double getElementAsDouble(unsigned i) const;
/// getElementAsConstant - Return a Constant for a specified index's element.
/// Note that this has to compute a new constant to return, so it isn't as
/// efficient as getElementAsInteger/Float/Double.
Constant *getElementAsConstant(unsigned i) const;
/// getType - Specialize the getType() method to always return a
/// SequentialType, which reduces the amount of casting needed in parts of the
/// compiler.
inline SequentialType *getType() const {
return reinterpret_cast<SequentialType*>(Value::getType());
}
/// getElementType - Return the element type of the array/vector.
Type *getElementType() const;
/// getNumElements - Return the number of elements in the array or vector.
unsigned getNumElements() const;
/// getElementByteSize - Return the size (in bytes) of each element in the
/// array/vector. The size of the elements is known to be a multiple of one
/// byte.
uint64_t getElementByteSize() const;
/// isString - This method returns true if this is an array of i8.
bool isString() const;
/// isCString - This method returns true if the array "isString", ends with a
/// nul byte, and does not contains any other nul bytes.
bool isCString() const;
/// getAsString - If this array is isString(), then this method returns the
/// array as a StringRef. Otherwise, it asserts out.
///
StringRef getAsString() const {
assert(isString() && "Not a string");
return getRawDataValues();
}
/// getAsCString - If this array is isCString(), then this method returns the
/// array (without the trailing null byte) as a StringRef. Otherwise, it
/// asserts out.
///
StringRef getAsCString() const {
assert(isCString() && "Isn't a C string");
StringRef Str = getAsString();
return Str.substr(0, Str.size()-1);
}
/// getRawDataValues - Return the raw, underlying, bytes of this data. Note
/// that this is an extremely tricky thing to work with, as it exposes the
/// host endianness of the data elements.
StringRef getRawDataValues() const;
virtual void destroyConstant();
/// Methods for support type inquiry through isa, cast, and dyn_cast:
///
static bool classof(const ConstantDataSequential *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == ConstantDataArrayVal ||
V->getValueID() == ConstantDataVectorVal;
}
private:
const char *getElementPointer(unsigned Elt) const;
};
//===----------------------------------------------------------------------===//
/// ConstantDataArray - An array constant whose element type is a simple
/// 1/2/4/8-byte integer or float/double, and whose elements are just simple
/// data values (i.e. ConstantInt/ConstantFP). This Constant node has no
/// operands because it stores all of the elements of the constant as densely
/// packed data, instead of as Value*'s.
class ConstantDataArray : public ConstantDataSequential {
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantDataArray(const ConstantDataArray &); // DO NOT IMPLEMENT
virtual void anchor();
friend class ConstantDataSequential;
explicit ConstantDataArray(Type *ty, const char *Data)
: ConstantDataSequential(ty, ConstantDataArrayVal, Data) {}
protected:
// allocate space for exactly zero operands.
void *operator new(size_t s) {
return User::operator new(s, 0);
}
public:
/// get() constructors - Return a constant with array type with an element
/// count and element type matching the ArrayRef passed in. Note that this
/// can return a ConstantAggregateZero object.
static Constant *get(LLVMContext &Context, ArrayRef<uint8_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint16_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint32_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint64_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<float> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<double> Elts);
/// getString - This method constructs a CDS 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 (increasing the length of the string by
/// one more than the StringRef would normally indicate. Pass AddNull=false
/// to disable this behavior.
static Constant *getString(LLVMContext &Context, StringRef 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.
///
inline ArrayType *getType() const {
return reinterpret_cast<ArrayType*>(Value::getType());
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
///
static bool classof(const ConstantDataArray *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == ConstantDataArrayVal;
}
};
//===----------------------------------------------------------------------===//
/// ConstantDataVector - A vector constant whose element type is a simple
/// 1/2/4/8-byte integer or float/double, and whose elements are just simple
/// data values (i.e. ConstantInt/ConstantFP). This Constant node has no
/// operands because it stores all of the elements of the constant as densely
/// packed data, instead of as Value*'s.
class ConstantDataVector : public ConstantDataSequential {
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantDataVector(const ConstantDataVector &); // DO NOT IMPLEMENT
virtual void anchor();
friend class ConstantDataSequential;
explicit ConstantDataVector(Type *ty, const char *Data)
: ConstantDataSequential(ty, ConstantDataVectorVal, Data) {}
protected:
// allocate space for exactly zero operands.
void *operator new(size_t s) {
return User::operator new(s, 0);
}
public:
/// get() constructors - Return a constant with vector type with an element
/// count and element type matching the ArrayRef passed in. Note that this
/// can return a ConstantAggregateZero object.
static Constant *get(LLVMContext &Context, ArrayRef<uint8_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint16_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint32_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<uint64_t> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<float> Elts);
static Constant *get(LLVMContext &Context, ArrayRef<double> Elts);
/// getSplat - Return a ConstantVector with the specified constant in each
/// element. The specified constant has to be a of a compatible type (i8/i16/
/// i32/i64/float/double) and must be a ConstantFP or ConstantInt.
static Constant *getSplat(unsigned NumElts, Constant *Elt);
/// 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;
/// getType - Specialize the getType() method to always return a VectorType,
/// which reduces the amount of casting needed in parts of the compiler.
///
inline VectorType *getType() const {
return reinterpret_cast<VectorType*>(Value::getType());
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
///
static bool classof(const ConstantDataVector *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == ConstantDataVectorVal;
}
};
/// 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.
///
/// 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 {
friend struct ConstantCreator<ConstantExpr,Type,
std::pair<unsigned, std::vector<Constant*> > >;
friend struct ConvertConstantType<ConstantExpr, Type>;
protected:
ConstantExpr(Type *ty, unsigned Opcode, Use *Ops, unsigned NumOps)
: Constant(ty, ConstantExprVal, Ops, NumOps) {
// Operation type (an Instruction opcode) is stored as the SubclassData.
setValueSubclassData(Opcode);
}
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.
/// 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 *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
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
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
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
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)
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
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
Type *Ty ///< The integer type to cast to
);
/// @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;
/// @brief Return true if this is an insertvalue or extractvalue expression,
/// 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);
/// get - Return a binary or shift operator constant expression,
/// folding if possible.
///
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 short pred, Constant *C1, Constant *C2);
/// get* - Return some common constants without having to
/// specify the full Instruction::OPCODE identifier.
///
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,
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,
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);
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 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;
/// 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 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->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 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 {
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
UndefValue(const UndefValue &); // DO NOT IMPLEMENT
protected:
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(Type *T);
/// getSequentialElement - If this Undef has array or vector type, return a
/// undef with the right element type.
UndefValue *getSequentialElement() const;
/// getStructElement - If this undef has struct type, return a undef with the
/// right element type for the specified element.
UndefValue *getStructElement(unsigned Elt) const;
/// getElementValue - Return an undef of the right value for the specified GEP
/// index.
UndefValue *getElementValue(Constant *C) const;
/// getElementValue - Return an undef of the right value for the specified GEP
/// index.
UndefValue *getElementValue(unsigned Idx) const;
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->getValueID() == UndefValueVal;
}
};
} // End llvm namespace
#endif