1 //=- SystemZFrameLowering.h - Define frame lowering for z/System -*- 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 SYSTEMZ_FRAMEINFO_H 15 #define SYSTEMZ_FRAMEINFO_H 16 17 #include "SystemZ.h" 18 #include "SystemZSubtarget.h" 19 #include "llvm/Target/TargetFrameLowering.h" 20 #include "llvm/ADT/IndexedMap.h" 21 22 namespace llvm { 23 class SystemZSubtarget; 24 25 class SystemZFrameLowering : public TargetFrameLowering { 26 IndexedMap<unsigned> RegSpillOffsets; 27 protected: 28 const SystemZSubtarget &STI; 29 30 public: 31 explicit SystemZFrameLowering(const SystemZSubtarget &sti); 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 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 48 RegScavenger *RS) const; 49 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; 53 }; 54 55 } // End llvm namespace 56 57 #endif 58
