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 72