1 //===- MSP430InstrInfo.h - MSP430 Instruction 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 MSP430 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_TARGET_MSP430INSTRINFO_H
15 #define LLVM_TARGET_MSP430INSTRINFO_H
17 #include "llvm/Target/TargetInstrInfo.h"
18 #include "MSP430RegisterInfo.h"
22 class MSP430TargetMachine;
24 /// MSP430II - This namespace holds all of the target specific flags that
25 /// instruction info tracks.
30 SizeMask = 7 << SizeShift,
32 SizeUnknown = 0 << SizeShift,
33 SizeSpecial = 1 << SizeShift,
34 Size2Bytes = 2 << SizeShift,
35 Size4Bytes = 3 << SizeShift,
36 Size6Bytes = 4 << SizeShift
40 class MSP430InstrInfo : public TargetInstrInfoImpl {
41 const MSP430RegisterInfo RI;
42 MSP430TargetMachine &TM;
44 explicit MSP430InstrInfo(MSP430TargetMachine &TM);
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).
50 virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
52 bool copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
53 unsigned DestReg, unsigned SrcReg,
54 const TargetRegisterClass *DestRC,
55 const TargetRegisterClass *SrcRC) const;
57 bool isMoveInstr(const MachineInstr& MI,
58 unsigned &SrcReg, unsigned &DstReg,
59 unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
61 virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
62 MachineBasicBlock::iterator MI,
63 unsigned SrcReg, bool isKill,
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;
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;
78 unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
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;
88 unsigned RemoveBranch(MachineBasicBlock &MBB) const;
89 unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
90 MachineBasicBlock *FBB,
91 const SmallVectorImpl<MachineOperand> &Cond) const;