XtensaRegisterInfo.h

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//===-- XtensaRegisterInfo.h - Xtensa Register Information Impl -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the Xtensa implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
#define LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
 
#include "Xtensa.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
 
#define GET_REGINFO_HEADER
#include "XtensaGenRegisterInfo.inc"
 
namespace llvm {
class MCRegisterClass;
using TargetRegisterClass = MCRegisterClass;
class XtensaInstrInfo;
class XtensaSubtarget;
 
class XtensaRegisterInfo : public XtensaGenRegisterInfo {
public:
  const XtensaSubtarget &Subtarget;
 
  XtensaRegisterInfo(const XtensaSubtarget &STI);
 
  bool requiresRegisterScavenging(const MachineFunction &MF) const override {
    return true;
  }
 
  bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
    return true;
  }
 
  bool trackLivenessAfterRegAlloc(const MachineFunction &) const override {
    return true;
  }
 
  const uint16_t *
  getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
                                       CallingConv::ID) const override;
  BitVector getReservedRegs(const MachineFunction &MF) const override;
 
  bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
                           unsigned FIOperandNum,
                           RegScavenger *RS = nullptr) const override;
 
  Register getFrameRegister(const MachineFunction &MF) const override;
};
 
} // end namespace llvm
 
#endif // LLVM_LIB_TARGET_XTENSA_REGISTERINFO_H