MSP430InstrInfo.h revision 746ad69e088176819981b4b2c5ac8dcd49f5e60e
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 20namespace llvm { 21 22class MSP430TargetMachine; 23 24/// MSP430II - This namespace holds all of the target specific flags that 25/// instruction info tracks. 26/// 27namespace 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 40class MSP430InstrInfo : public TargetInstrInfoImpl { 41 const MSP430RegisterInfo RI; 42 MSP430TargetMachine &TM; 43public: 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, 66 const TargetRegisterInfo *TRI) const; 67 virtual void loadRegFromStackSlot(MachineBasicBlock &MBB, 68 MachineBasicBlock::iterator MI, 69 unsigned DestReg, int FrameIdx, 70 const TargetRegisterClass *RC, 71 const TargetRegisterInfo *TRI) const; 72 73 virtual bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 74 MachineBasicBlock::iterator MI, 75 const std::vector<CalleeSavedInfo> &CSI) const; 76 virtual bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 77 MachineBasicBlock::iterator MI, 78 const std::vector<CalleeSavedInfo> &CSI) const; 79 80 unsigned GetInstSizeInBytes(const MachineInstr *MI) const; 81 82 // Branch folding goodness 83 bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const; 84 bool isUnpredicatedTerminator(const MachineInstr *MI) const; 85 bool AnalyzeBranch(MachineBasicBlock &MBB, 86 MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, 87 SmallVectorImpl<MachineOperand> &Cond, 88 bool AllowModify) const; 89 90 unsigned RemoveBranch(MachineBasicBlock &MBB) const; 91 unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, 92 MachineBasicBlock *FBB, 93 const SmallVectorImpl<MachineOperand> &Cond) const; 94 95}; 96 97} 98 99#endif 100