llvm/lib/Target/Xtensa/XtensaRegisterInfo.h

   1 //===-- XtensaRegisterInfo.h - Xtensa 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 Xtensa implementation of the TargetRegisterInfo class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
  14 #define LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
  15
  16 #include "Xtensa.h"
  17 #include "llvm/CodeGen/TargetRegisterInfo.h"
  18
  19 #define GET_REGINFO_HEADER
  20 #include "XtensaGenRegisterInfo.inc"
  21
  22 namespace llvm {
  23 class TargetRegisterClass;
  24 class XtensaInstrInfo;
  25 class XtensaSubtarget;
  26
  27 class XtensaRegisterInfo : public XtensaGenRegisterInfo {
  28 public:
  29   const XtensaSubtarget &Subtarget;
  30
  31   XtensaRegisterInfo(const XtensaSubtarget &STI);
  32
  33   bool requiresRegisterScavenging(const MachineFunction &MF) const override {
  34     return true;
  35   }
  36
  37   bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
  38     return true;
  39   }
  40
  41   bool trackLivenessAfterRegAlloc(const MachineFunction &) const override {
  42     return true;
  43   }
  44
  45   const uint16_t *
  46   getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
  47   const uint32_t *getCallPreservedMask(const MachineFunction &MF,
  48                                        CallingConv::ID) const override;
  49   BitVector getReservedRegs(const MachineFunction &MF) const override;
  50
  51   bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
  52                            unsigned FIOperandNum,
  53                            RegScavenger *RS = nullptr) const override;
  54
  55   Register getFrameRegister(const MachineFunction &MF) const override;
  56 };
  57
  58 } // end namespace llvm
  59
  60 #endif // LLVM_LIB_TARGET_XTENSA_REGISTERINFO_H