1 //=- SystemZFrameLowering.h - Define frame lowering for z/System -*- C++ -*--=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
14 #ifndef SYSTEMZ_FRAMEINFO_H
15 #define SYSTEMZ_FRAMEINFO_H
18 #include "SystemZSubtarget.h"
19 #include "llvm/Target/TargetFrameLowering.h"
20 #include "llvm/ADT/IndexedMap.h"
23 class SystemZSubtarget;
25 class SystemZFrameLowering : public TargetFrameLowering {
26 IndexedMap<unsigned> RegSpillOffsets;
28 const SystemZSubtarget &STI;
31 explicit SystemZFrameLowering(const SystemZSubtarget &sti);
33 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
35 void emitPrologue(MachineFunction &MF) const;
36 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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;
47 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
48 RegScavenger *RS) const;
50 bool hasReservedCallFrame(const MachineFunction &MF) const { return true; }
51 bool hasFP(const MachineFunction &MF) const;
52 int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
55 } // End llvm namespace