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
21namespace llvm {
22
23/// Utilities relating to AVR registers.
24class AVRRegisterInfo : public AVRGenRegisterInfo {
25public:
26 AVRRegisterInfo();
27
28public:
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