1 //===-- AVRRegisterInfo.h - AVR Register Information Impl -------*- 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 // 9 // This file contains the AVR implementation of the TargetRegisterInfo class. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_AVR_REGISTER_INFO_H 14 #define LLVM_AVR_REGISTER_INFO_H 15 16 #include "llvm/CodeGen/TargetRegisterInfo.h" 17 18 #define GET_REGINFO_HEADER 19 #include "AVRGenRegisterInfo.inc" 20 21 namespace llvm { 22 23 /// Utilities relating to AVR registers. 24 class AVRRegisterInfo : public AVRGenRegisterInfo { 25 public: 26 AVRRegisterInfo(); 27 28 public: 29 const uint16_t * 30 getCalleeSavedRegs(const MachineFunction *MF = nullptr) const override; 31 const uint32_t *getCallPreservedMask(const MachineFunction &MF, 32 CallingConv::ID CC) const override; 33 BitVector getReservedRegs(const MachineFunction &MF) const override; 34 35 const TargetRegisterClass * 36 getLargestLegalSuperClass(const TargetRegisterClass *RC, 37 const MachineFunction &MF) const override; 38 39 /// Stack Frame Processing Methods 40 bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj, 41 unsigned FIOperandNum, 42 RegScavenger *RS = nullptr) const override; 43 44 Register getFrameRegister(const MachineFunction &MF) const override; 45 46 const TargetRegisterClass * 47 getPointerRegClass(const MachineFunction &MF, 48 unsigned Kind = 0) const override; 49 50 /// Splits a 16-bit `DREGS` register into the lo/hi register pair. 51 /// \param Reg A 16-bit register to split. 52 void splitReg(Register Reg, Register &LoReg, Register &HiReg) const; 53 54 bool shouldCoalesce(MachineInstr *MI, const TargetRegisterClass *SrcRC, 55 unsigned SubReg, const TargetRegisterClass *DstRC, 56 unsigned DstSubReg, const TargetRegisterClass *NewRC, 57 LiveIntervals &LIS) const override; 58 }; 59 60 } // end namespace llvm 61 62 #endif // LLVM_AVR_REGISTER_INFO_H 63