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//===-- CGValue.h - LLVM CodeGen wrappers for llvm::Value* ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// These classes implement wrappers around llvm::Value in order to
// fully represent the range of values for Complex, Character, Array and L/Rvalues.
//
//===----------------------------------------------------------------------===//
#ifndef FLANG_CODEGEN_CGVALUE_H
#define FLANG_CODEGEN_CGVALUE_H
#include "flang/AST/ASTContext.h"
#include "flang/AST/Type.h"
#include "llvm/IR/Value.h"
namespace llvm {
class Constant;
class MDNode;
}
namespace flang {
namespace CodeGen {
class ComplexValueTy {
public:
llvm::Value *Re, *Im;
ComplexValueTy() {}
ComplexValueTy(llvm::Value *Real, llvm::Value *Imaginary)
: Re(Real), Im(Imaginary) {}
};
class CharacterValueTy {
public:
llvm::Value *Ptr, *Len;
CharacterValueTy() {}
CharacterValueTy(llvm::Value *Pointer, llvm::Value *Length)
: Ptr(Pointer), Len(Length) {}
};
/// ArrayDimensionValueTy - this is a single dimension
/// of an array. All values have SizeTy type.
class ArrayDimensionValueTy {
public:
llvm::Value *LowerBound;
llvm::Value *UpperBound;
llvm::Value *Stride;
ArrayDimensionValueTy() {}
ArrayDimensionValueTy(llvm::Value *LB, llvm::Value *UB = nullptr,
llvm::Value *stride = nullptr)
: LowerBound(LB), UpperBound(UB), Stride(stride) {}
bool hasLowerBound() const {
return LowerBound != nullptr;
}
bool hasUpperBound() const {
return UpperBound != nullptr;
}
bool hasStride() const {
return Stride != nullptr;
}
};
/// ArrayValueRef - this a reference to an array
/// value.
class ArrayValueRef {
public:
ArrayRef<ArrayDimensionValueTy> Dimensions;
llvm::Value *Ptr;
llvm::Value *Offset;
ArrayValueRef(ArrayRef<ArrayDimensionValueTy> Dims,
llvm::Value *P,
llvm::Value *offset = nullptr)
: Dimensions(Dims), Ptr(P),
Offset(offset) {}
bool hasOffset() const {
return Offset != nullptr;
}
};
/// ArrayVectorValueTy - this is a one dimensional
/// array value.
class ArrayVectorValueTy {
public:
ArrayDimensionValueTy Dimension;
llvm::Value *Ptr;
ArrayVectorValueTy(ArrayDimensionValueTy Dim,
llvm::Value *P)
: Dimension(Dim), Ptr(P) {}
};
class LValueTy {
public:
llvm::Value *Ptr;
QualType Type;
LValueTy() {}
LValueTy(llvm::Value *Dest)
: Ptr(Dest) {}
LValueTy(llvm::Value *Dest, QualType Ty)
: Ptr(Dest), Type(Ty) {}
llvm::Value *getPointer() const {
return Ptr;
}
QualType getType() const {
return Type;
}
bool isVolatileQualifier() const {
return false;// NB: to be used in the future
}
};
class RValueTy {
public:
enum Kind {
None,
Scalar,
Complex,
Character,
Aggregate
};
private:
Kind ValueType;
llvm::Value *V1;
llvm::Value *V2;
RValueTy(llvm::Value *V, Kind Type)
: V1(V), ValueType(Type) {}
public:
RValueTy() : ValueType(None) {}
RValueTy(llvm::Value *V)
: V1(V), ValueType(Scalar) {}
RValueTy(ComplexValueTy C)
: V1(C.Re), V2(C.Im), ValueType(Complex) {}
RValueTy(CharacterValueTy CharValue)
: V1(CharValue.Ptr), V2(CharValue.Len), ValueType(Character) {}
Kind getType() const {
return ValueType;
}
bool isScalar() const {
return getType() == Scalar;
}
bool isComplex() const {
return getType() == Complex;
}
bool isCharacter() const {
return getType() == Character;
}
bool isAggregate() const {
return getType() == Aggregate;
}
bool isNothing() const {
return getType() == None;
}
bool isVolatileQualifier() const {
return false;// NB: to be used in the future
}
llvm::Value *asScalar() const {
return V1;
}
ComplexValueTy asComplex() const {
return ComplexValueTy(V1, V2);
}
CharacterValueTy asCharacter() const {
return CharacterValueTy(V1, V2);
}
llvm::Value *getAggregateAddr() const {
assert(isAggregate());
return V1;
}
static RValueTy getAggregate(llvm::Value *Ptr, bool isVolatile = false) {
return RValueTy(Ptr, Aggregate);
}
};
} // end namespace CodeGen
} // end namespace flang
#endif
|
