xref: /freebsd/contrib/llvm-project/llvm/lib/Target/MSP430/MSP430FrameLowering.h (revision f976241773df2260e6170317080761d1c5814fe5)
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 class MSP430FrameLowering : public TargetFrameLowering {
21 protected:
22 
23 public:
24   explicit MSP430FrameLowering()
25       : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 2, -2, 2) {}
26 
27   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
28   /// the function.
29   void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) 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                                  const std::vector<CalleeSavedInfo> &CSI,
39                                  const TargetRegisterInfo *TRI) const override;
40   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
41                                   MachineBasicBlock::iterator MI,
42                                   std::vector<CalleeSavedInfo> &CSI,
43                                   const TargetRegisterInfo *TRI) const override;
44 
45   bool hasFP(const MachineFunction &MF) const override;
46   bool hasReservedCallFrame(const MachineFunction &MF) const override;
47   void processFunctionBeforeFrameFinalized(MachineFunction &MF,
48                                      RegScavenger *RS = nullptr) const override;
49 };
50 
51 } // End llvm namespace
52 
53 #endif
54