1 //==- MSP430FrameLowering.h - Define frame lowering for MSP430 --*- C++ -*--==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef MSP430_FRAMEINFO_H
15 #define MSP430_FRAMEINFO_H
16 
17 #include "MSP430.h"
18 #include "MSP430Subtarget.h"
19 #include "llvm/Target/TargetFrameLowering.h"
20 
21 namespace llvm {
22   class MSP430Subtarget;
23 
24 class MSP430FrameLowering : public TargetFrameLowering {
25 protected:
26   const MSP430Subtarget &STI;
27 
28 public:
MSP430FrameLowering(const MSP430Subtarget & sti)29   explicit MSP430FrameLowering(const MSP430Subtarget &sti)
30     : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 2, -2), STI(sti) {
31   }
32 
33   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
34   /// the function.
35   void emitPrologue(MachineFunction &MF) const;
36   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
37 
38   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
39                                  MachineBasicBlock::iterator MI,
40                                  const std::vector<CalleeSavedInfo> &CSI,
41                                  const TargetRegisterInfo *TRI) const;
42   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
43                                    MachineBasicBlock::iterator MI,
44                                    const std::vector<CalleeSavedInfo> &CSI,
45                                    const TargetRegisterInfo *TRI) const;
46 
47   bool hasFP(const MachineFunction &MF) const;
48   bool hasReservedCallFrame(const MachineFunction &MF) const;
49 };
50 
51 } // End llvm namespace
52 
53 #endif
54