Thumb1InstrInfo.h revision 198090
1//===- Thumb1InstrInfo.h - Thumb-1 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 Thumb-1 implementation of the TargetInstrInfo class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef THUMB1INSTRUCTIONINFO_H 15#define THUMB1INSTRUCTIONINFO_H 16 17#include "llvm/Target/TargetInstrInfo.h" 18#include "ARM.h" 19#include "ARMInstrInfo.h" 20#include "Thumb1RegisterInfo.h" 21 22namespace llvm { 23 class ARMSubtarget; 24 25class Thumb1InstrInfo : public ARMBaseInstrInfo { 26 Thumb1RegisterInfo RI; 27public: 28 explicit Thumb1InstrInfo(const ARMSubtarget &STI); 29 30 // Return the non-pre/post incrementing version of 'Opc'. Return 0 31 // if there is not such an opcode. 32 unsigned getUnindexedOpcode(unsigned Opc) const; 33 34 // Return true if the block does not fall through. 35 bool BlockHasNoFallThrough(const MachineBasicBlock &MBB) const; 36 37 /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As 38 /// such, whenever a client has an instance of instruction info, it should 39 /// always be able to get register info as well (through this method). 40 /// 41 const Thumb1RegisterInfo &getRegisterInfo() const { return RI; } 42 43 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 44 MachineBasicBlock::iterator MI, 45 const std::vector<CalleeSavedInfo> &CSI) const; 46 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 47 MachineBasicBlock::iterator MI, 48 const std::vector<CalleeSavedInfo> &CSI) const; 49 50 bool copyRegToReg(MachineBasicBlock &MBB, 51 MachineBasicBlock::iterator I, 52 unsigned DestReg, unsigned SrcReg, 53 const TargetRegisterClass *DestRC, 54 const TargetRegisterClass *SrcRC) const; 55 void storeRegToStackSlot(MachineBasicBlock &MBB, 56 MachineBasicBlock::iterator MBBI, 57 unsigned SrcReg, bool isKill, int FrameIndex, 58 const TargetRegisterClass *RC) const; 59 60 void loadRegFromStackSlot(MachineBasicBlock &MBB, 61 MachineBasicBlock::iterator MBBI, 62 unsigned DestReg, int FrameIndex, 63 const TargetRegisterClass *RC) const; 64 65 bool canFoldMemoryOperand(const MachineInstr *MI, 66 const SmallVectorImpl<unsigned> &Ops) const; 67 68 MachineInstr* foldMemoryOperandImpl(MachineFunction &MF, 69 MachineInstr* MI, 70 const SmallVectorImpl<unsigned> &Ops, 71 int FrameIndex) const; 72 73 MachineInstr* foldMemoryOperandImpl(MachineFunction &MF, 74 MachineInstr* MI, 75 const SmallVectorImpl<unsigned> &Ops, 76 MachineInstr* LoadMI) const { 77 return 0; 78 } 79}; 80} 81 82#endif // THUMB1INSTRUCTIONINFO_H 83