Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- 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