llvm/lib/Target/Xtensa/XtensaFrameLowering.h

   1 //===- XtensaFrameLowering.h - Define frame lowering for Xtensa --*- 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 #ifndef LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H
  10 #define LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H
  11
  12 #include "llvm/CodeGen/TargetFrameLowering.h"
  13
  14 namespace llvm {
  15 class XtensaTargetMachine;
  16 class XtensaSubtarget;
  17 class XtensaInstrInfo;
  18 class XtensaRegisterInfo;
  19
  20 class XtensaFrameLowering : public TargetFrameLowering {
  21   const XtensaInstrInfo &TII;
  22   const XtensaRegisterInfo *TRI;
  23
  24 public:
  25   XtensaFrameLowering(const XtensaSubtarget &STI);
  26
  27   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  28   /// the function.
  29   void emitPrologue(MachineFunction &, MachineBasicBlock &) const override;
  30   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  31
  32   MachineBasicBlock::iterator
  33   eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
  34                                 MachineBasicBlock::iterator I) const override;
  35
  36   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  37                                  MachineBasicBlock::iterator MI,
  38                                  ArrayRef<CalleeSavedInfo> CSI,
  39                                  const TargetRegisterInfo *TRI) const override;
  40   bool
  41   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  42                               MachineBasicBlock::iterator MI,
  43                               MutableArrayRef<CalleeSavedInfo> CSI,
  44                               const TargetRegisterInfo *TRI) const override;
  45
  46   void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
  47                             RegScavenger *RS) const override;
  48
  49   void processFunctionBeforeFrameFinalized(MachineFunction &MF,
  50                                            RegScavenger *RS) const override;
  51
  52 protected:
  53   bool hasFPImpl(const MachineFunction &MF) const override;
  54 };
  55
  56 } // namespace llvm
  57
  58 #endif /* LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H */