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 60
