lib/Target/MSP430/MSP430InstrInfo.h

   1 //===- MSP430InstrInfo.h - MSP430 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 MSP430 implementation of the TargetInstrInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TARGET_MSP430INSTRINFO_H
  15 #define LLVM_TARGET_MSP430INSTRINFO_H
  16
  17 #include "llvm/Target/TargetInstrInfo.h"
  18 #include "MSP430RegisterInfo.h"
  19
  20 namespace llvm {
  21
  22 class MSP430TargetMachine;
  23
  24 /// MSP430II - This namespace holds all of the target specific flags that
  25 /// instruction info tracks.
  26 ///
  27 namespace MSP430II {
  28   enum {
  29     SizeShift   = 2,
  30     SizeMask    = 7 << SizeShift,
  31
  32     SizeUnknown = 0 << SizeShift,
  33     SizeSpecial = 1 << SizeShift,
  34     Size2Bytes  = 2 << SizeShift,
  35     Size4Bytes  = 3 << SizeShift,
  36     Size6Bytes  = 4 << SizeShift
  37   };
  38 }
  39
  40 class MSP430InstrInfo : public TargetInstrInfoImpl {
  41   const MSP430RegisterInfo RI;
  42   MSP430TargetMachine &TM;
  43 public:
  44   explicit MSP430InstrInfo(MSP430TargetMachine &TM);
  45
  46   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  47   /// such, whenever a client has an instance of instruction info, it should
  48   /// always be able to get register info as well (through this method).
  49   ///
  50   virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
  51
  52   bool copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
  53                     unsigned DestReg, unsigned SrcReg,
  54                     const TargetRegisterClass *DestRC,
  55                     const TargetRegisterClass *SrcRC) const;
  56
  57   bool isMoveInstr(const MachineInstr& MI,
  58                    unsigned &SrcReg, unsigned &DstReg,
  59                    unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
  60
  61   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
  62                                    MachineBasicBlock::iterator MI,
  63                                    unsigned SrcReg, bool isKill,
  64                                    int FrameIndex,
  65                                    const TargetRegisterClass *RC) const;
  66   virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
  67                                     MachineBasicBlock::iterator MI,
  68                                     unsigned DestReg, int FrameIdx,
  69                                     const TargetRegisterClass *RC) const;
  70
  71   virtual bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  72                                          MachineBasicBlock::iterator MI,
  73                                  const std::vector<CalleeSavedInfo> &CSI) const;
  74   virtual bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  75                                            MachineBasicBlock::iterator MI,
  76                                  const std::vector<CalleeSavedInfo> &CSI) const;
  77
  78   unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
  79
  80   // Branch folding goodness
  81   bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
  82   bool isUnpredicatedTerminator(const MachineInstr *MI) const;
  83   bool AnalyzeBranch(MachineBasicBlock &MBB,
  84                      MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
  85                      SmallVectorImpl<MachineOperand> &Cond,
  86                      bool AllowModify) const;
  87
  88   unsigned RemoveBranch(MachineBasicBlock &MBB) const;
  89   unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
  90                         MachineBasicBlock *FBB,
  91                         const SmallVectorImpl<MachineOperand> &Cond) const;
  92
  93 };
  94
  95 }
  96
  97 #endif