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//===- llvm/MC/MachineLocation.h --------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// The MachineLocation class is used to represent a simple location in a machine
// frame. Locations will be one of two forms; a register or an address formed
// from a base address plus an offset. Register indirection can be specified by
// explicitly passing an offset to the constructor.
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MACHINELOCATION_H
#define LLVM_MC_MACHINELOCATION_H
#include <cstdint>
#include <cassert>
namespace llvm {
class MachineLocation {
private:
bool IsRegister = false; ///< True if location is a register.
unsigned Register = 0; ///< gcc/gdb register number.
public:
enum : uint32_t {
// The target register number for an abstract frame pointer. The value is
// an arbitrary value that doesn't collide with any real target register.
VirtualFP = ~0U
};
MachineLocation() = default;
/// Create a direct register location.
explicit MachineLocation(unsigned R, bool Indirect = false)
: IsRegister(!Indirect), Register(R) {}
bool operator==(const MachineLocation &Other) const {
return IsRegister == Other.IsRegister && Register == Other.Register;
}
// Accessors.
/// \return true iff this is a register-indirect location.
bool isIndirect() const { return !IsRegister; }
bool isReg() const { return IsRegister; }
unsigned getReg() const { return Register; }
void setIsRegister(bool Is) { IsRegister = Is; }
void setRegister(unsigned R) { Register = R; }
};
inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) {
return !(LHS == RHS);
}
} // end namespace llvm
#endif // LLVM_MC_MACHINELOCATION_H
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