lib/Target/SystemZ/SystemZRegisterInfo.h

   1 //===-- SystemZRegisterInfo.h - SystemZ Register Information ----*- 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 // This file contains the SystemZ implementation of the TargetRegisterInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef SystemZREGISTERINFO_H
  15 #define SystemZREGISTERINFO_H
  16
  17 #include "llvm/Target/TargetRegisterInfo.h"
  18 #include "SystemZGenRegisterInfo.h.inc"
  19
  20 namespace llvm {
  21
  22 class SystemZSubtarget;
  23 class SystemZInstrInfo;
  24 class Type;
  25
  26 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
  27   SystemZTargetMachine &TM;
  28   const SystemZInstrInfo &TII;
  29
  30   SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
  31
  32   /// Code Generation virtual methods...
  33   const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
  34
  35   BitVector getReservedRegs(const MachineFunction &MF) const;
  36
  37   bool hasReservedCallFrame(const MachineFunction &MF) const { return true; }
  38   bool hasFP(const MachineFunction &MF) const;
  39
  40   int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
  41
  42   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  43                                      MachineBasicBlock &MBB,
  44                                      MachineBasicBlock::iterator I) const;
  45
  46   void eliminateFrameIndex(MachineBasicBlock::iterator II,
  47                            int SPAdj, RegScavenger *RS = NULL) const;
  48
  49
  50   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  51                                             RegScavenger *RS) const;
  52
  53   void emitPrologue(MachineFunction &MF) const;
  54   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  55
  56   // Debug information queries.
  57   unsigned getRARegister() const;
  58   unsigned getFrameRegister(const MachineFunction &MF) const;
  59
  60   // Exception handling queries.
  61   unsigned getEHExceptionRegister() const;
  62   unsigned getEHHandlerRegister() const;
  63
  64   int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  65 };
  66
  67 } // end namespace llvm
  68
  69 #endif