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