| //===- 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 |