1 //===-- SystemZRegisterInfo.h - SystemZ Register Information ----*- 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 //===----------------------------------------------------------------------===//
10 // This file contains the SystemZ implementation of the TargetRegisterInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef SystemZREGISTERINFO_H
15 #define SystemZREGISTERINFO_H
17 #include "llvm/Target/TargetRegisterInfo.h"
18 #include "SystemZGenRegisterInfo.h.inc"
22 class SystemZSubtarget;
23 class SystemZInstrInfo;
26 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
27 SystemZTargetMachine &TM;
28 const SystemZInstrInfo &TII;
30 SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
32 /// Code Generation virtual methods...
33 const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
35 const TargetRegisterClass* const* getCalleeSavedRegClasses(
36 const MachineFunction *MF = 0) const;
38 BitVector getReservedRegs(const MachineFunction &MF) const;
40 bool hasReservedCallFrame(MachineFunction &MF) const { return true; }
41 bool hasFP(const MachineFunction &MF) const;
43 int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
45 void eliminateCallFramePseudoInstr(MachineFunction &MF,
46 MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator I) const;
49 unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
50 int SPAdj, FrameIndexValue *Value = NULL,
51 RegScavenger *RS = NULL) const;
54 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
55 RegScavenger *RS) const;
57 void emitPrologue(MachineFunction &MF) const;
58 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
60 // Debug information queries.
61 unsigned getRARegister() const;
62 unsigned getFrameRegister(const MachineFunction &MF) const;
64 // Exception handling queries.
65 unsigned getEHExceptionRegister() const;
66 unsigned getEHHandlerRegister() const;
68 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
71 } // end namespace llvm