Yi Kong | 878f994 | 2023-12-13 12:55:04 +0900 | [diff] [blame^] | 1 | //===- llvm/MC/MachineLocation.h --------------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // The MachineLocation class is used to represent a simple location in a machine |
| 9 | // frame. Locations will be one of two forms; a register or an address formed |
| 10 | // from a base address plus an offset. Register indirection can be specified by |
| 11 | // explicitly passing an offset to the constructor. |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_MC_MACHINELOCATION_H |
| 15 | #define LLVM_MC_MACHINELOCATION_H |
| 16 | |
| 17 | #include <cstdint> |
| 18 | #include <cassert> |
| 19 | |
| 20 | namespace llvm { |
| 21 | |
| 22 | class MachineLocation { |
| 23 | private: |
| 24 | bool IsRegister = false; ///< True if location is a register. |
| 25 | unsigned Register = 0; ///< gcc/gdb register number. |
| 26 | |
| 27 | public: |
| 28 | enum : uint32_t { |
| 29 | // The target register number for an abstract frame pointer. The value is |
| 30 | // an arbitrary value that doesn't collide with any real target register. |
| 31 | VirtualFP = ~0U |
| 32 | }; |
| 33 | |
| 34 | MachineLocation() = default; |
| 35 | /// Create a direct register location. |
| 36 | explicit MachineLocation(unsigned R, bool Indirect = false) |
| 37 | : IsRegister(!Indirect), Register(R) {} |
| 38 | |
| 39 | bool operator==(const MachineLocation &Other) const { |
| 40 | return IsRegister == Other.IsRegister && Register == Other.Register; |
| 41 | } |
| 42 | |
| 43 | // Accessors. |
| 44 | /// \return true iff this is a register-indirect location. |
| 45 | bool isIndirect() const { return !IsRegister; } |
| 46 | bool isReg() const { return IsRegister; } |
| 47 | unsigned getReg() const { return Register; } |
| 48 | void setIsRegister(bool Is) { IsRegister = Is; } |
| 49 | void setRegister(unsigned R) { Register = R; } |
| 50 | }; |
| 51 | |
| 52 | inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) { |
| 53 | return !(LHS == RHS); |
| 54 | } |
| 55 | |
| 56 | } // end namespace llvm |
| 57 | |
| 58 | #endif // LLVM_MC_MACHINELOCATION_H |