llvm/lib/Target/MSP430/MSP430FrameLowering.h

   1 //==- MSP430FrameLowering.h - Define frame lowering for MSP430 --*- 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 //
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MSP430_MSP430FRAMELOWERING_H
  14 #define LLVM_LIB_TARGET_MSP430_MSP430FRAMELOWERING_H
  15
  16 #include "MSP430.h"
  17 #include "llvm/CodeGen/TargetFrameLowering.h"
  18
  19 namespace llvm {
  20
  21 class MSP430Subtarget;
  22 class MSP430InstrInfo;
  23 class MSP430RegisterInfo;
  24
  25 class MSP430FrameLowering : public TargetFrameLowering {
  26 protected:
  27
  28 public:
  29   MSP430FrameLowering(const MSP430Subtarget &STI);
  30
  31   const MSP430Subtarget &STI;
  32   const MSP430InstrInfo &TII;
  33   const MSP430RegisterInfo *TRI;
  34
  35   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  36   /// the function.
  37   void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  38   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  39
  40   MachineBasicBlock::iterator
  41   eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
  42                                 MachineBasicBlock::iterator I) const override;
  43
  44   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  45                                  MachineBasicBlock::iterator MI,
  46                                  ArrayRef<CalleeSavedInfo> CSI,
  47                                  const TargetRegisterInfo *TRI) const override;
  48   bool
  49   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  50                               MachineBasicBlock::iterator MI,
  51                               MutableArrayRef<CalleeSavedInfo> CSI,
  52                               const TargetRegisterInfo *TRI) const override;
  53
  54   bool hasFP(const MachineFunction &MF) const override;
  55   bool hasReservedCallFrame(const MachineFunction &MF) const override;
  56   void processFunctionBeforeFrameFinalized(MachineFunction &MF,
  57                                      RegScavenger *RS = nullptr) const override;
  58
  59   /// Wraps up getting a CFI index and building a MachineInstr for it.
  60   void BuildCFI(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
  61                 const DebugLoc &DL, const MCCFIInstruction &CFIInst,
  62                 MachineInstr::MIFlag Flag = MachineInstr::NoFlags) const;
  63
  64   void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
  65                                  MachineBasicBlock::iterator MBBI,
  66                                  const DebugLoc &DL, bool IsPrologue) const;
  67 };
  68
  69 } // End llvm namespace
  70
  71 #endif