lib/Target/SystemZ/SystemZInstrInfo.h

   1 //===- SystemZInstrInfo.h - SystemZ Instruction 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 TargetInstrInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TARGET_SYSTEMZINSTRINFO_H
  15 #define LLVM_TARGET_SYSTEMZINSTRINFO_H
  16
  17 #include "SystemZ.h"
  18 #include "SystemZRegisterInfo.h"
  19 #include "llvm/ADT/IndexedMap.h"
  20 #include "llvm/Target/TargetInstrInfo.h"
  21
  22 namespace llvm {
  23
  24 class SystemZTargetMachine;
  25
  26 class SystemZInstrInfo : public TargetInstrInfoImpl {
  27   const SystemZRegisterInfo RI;
  28   SystemZTargetMachine &TM;
  29   IndexedMap<unsigned> RegSpillOffsets;
  30 public:
  31   explicit SystemZInstrInfo(SystemZTargetMachine &TM);
  32
  33   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  34   /// such, whenever a client has an instance of instruction info, it should
  35   /// always be able to get register info as well (through this method).
  36   ///
  37   virtual const SystemZRegisterInfo &getRegisterInfo() const { return RI; }
  38
  39   bool copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
  40                     unsigned DestReg, unsigned SrcReg,
  41                     const TargetRegisterClass *DestRC,
  42                     const TargetRegisterClass *SrcRC) const;
  43
  44   bool isMoveInstr(const MachineInstr& MI,
  45                    unsigned &SrcReg, unsigned &DstReg,
  46                    unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
  47
  48   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
  49                                    MachineBasicBlock::iterator MI,
  50                                    unsigned SrcReg, bool isKill,
  51                                    int FrameIndex,
  52                                    const TargetRegisterClass *RC) const;
  53   virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
  54                                     MachineBasicBlock::iterator MI,
  55                                     unsigned DestReg, int FrameIdx,
  56                                     const TargetRegisterClass *RC) const;
  57
  58   virtual bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  59                                          MachineBasicBlock::iterator MI,
  60                                  const std::vector<CalleeSavedInfo> &CSI) const;
  61   virtual bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  62                                            MachineBasicBlock::iterator MI,
  63                                  const std::vector<CalleeSavedInfo> &CSI) const;
  64
  65   virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
  66                                 MachineBasicBlock *FBB,
  67                              const SmallVectorImpl<MachineOperand> &Cond) const;
  68
  69   const TargetInstrDesc& getBrCond(SystemZCC::CondCodes CC) const;
  70   const TargetInstrDesc& getLongDispOpc(unsigned Opc) const;
  71 };
  72
  73 }
  74
  75 #endif