lib/Target/AVR/AVRRegisterInfo.h

   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 = 0) 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   void eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
  41                            unsigned FIOperandNum,
  42                            RegScavenger *RS = NULL) 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(unsigned Reg, unsigned &LoReg, unsigned &HiReg) const;
  53
  54   bool trackLivenessAfterRegAlloc(const MachineFunction &) const override {
  55     return true;
  56   }
  57
  58   bool shouldCoalesce(MachineInstr *MI,
  59                       const TargetRegisterClass *SrcRC,
  60                       unsigned SubReg,
  61                       const TargetRegisterClass *DstRC,
  62                       unsigned DstSubReg,
  63                       const TargetRegisterClass *NewRC,
  64                       LiveIntervals &LIS) const override;
  65 };
  66
  67 } // end namespace llvm
  68
  69 #endif // LLVM_AVR_REGISTER_INFO_H