Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame^] | 1 | //===- llvm/MC/MachineLocation.h --------------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // The MachineLocation class is used to represent a simple location in a machine |
| 10 | // frame. Locations will be one of two forms; a register or an address formed |
| 11 | // from a base address plus an offset. Register indirection can be specified by |
| 12 | // explicitly passing an offset to the constructor. |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #ifndef LLVM_MC_MACHINELOCATION_H |
| 16 | #define LLVM_MC_MACHINELOCATION_H |
| 17 | |
| 18 | #include <cstdint> |
| 19 | #include <cassert> |
| 20 | |
| 21 | namespace llvm { |
| 22 | |
| 23 | class MachineLocation { |
| 24 | private: |
| 25 | bool IsRegister = false; ///< True if location is a register. |
| 26 | unsigned Register = 0; ///< gcc/gdb register number. |
| 27 | |
| 28 | public: |
| 29 | enum : uint32_t { |
| 30 | // The target register number for an abstract frame pointer. The value is |
| 31 | // an arbitrary value that doesn't collide with any real target register. |
| 32 | VirtualFP = ~0U |
| 33 | }; |
| 34 | |
| 35 | MachineLocation() = default; |
| 36 | /// Create a direct register location. |
| 37 | explicit MachineLocation(unsigned R, bool Indirect = false) |
| 38 | : IsRegister(!Indirect), Register(R) {} |
| 39 | |
| 40 | bool operator==(const MachineLocation &Other) const { |
| 41 | return IsRegister == Other.IsRegister && Register == Other.Register; |
| 42 | } |
| 43 | |
| 44 | // Accessors. |
| 45 | /// \return true iff this is a register-indirect location. |
| 46 | bool isIndirect() const { return !IsRegister; } |
| 47 | bool isReg() const { return IsRegister; } |
| 48 | unsigned getReg() const { return Register; } |
| 49 | void setIsRegister(bool Is) { IsRegister = Is; } |
| 50 | void setRegister(unsigned R) { Register = R; } |
| 51 | }; |
| 52 | |
| 53 | inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) { |
| 54 | return !(LHS == RHS); |
| 55 | } |
| 56 | |
| 57 | } // end namespace llvm |
| 58 | |
| 59 | #endif // LLVM_MC_MACHINELOCATION_H |