1 //===- Thumb2InstrInfo.h - Thumb-2 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 Thumb-2 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef THUMB2INSTRUCTIONINFO_H
15 #define THUMB2INSTRUCTIONINFO_H
17 #include "llvm/Target/TargetInstrInfo.h"
19 #include "ARMInstrInfo.h"
20 #include "Thumb2RegisterInfo.h"
25 class Thumb2InstrInfo : public ARMBaseInstrInfo {
26 Thumb2RegisterInfo RI;
28 explicit Thumb2InstrInfo(const ARMSubtarget &STI);
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;
34 // Return the opcode that implements 'Op', or 0 if no opcode
35 unsigned getOpcode(ARMII::Op Op) const;
37 // Return true if the block does not fall through.
38 bool BlockHasNoFallThrough(const MachineBasicBlock &MBB) const;
40 /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
41 /// such, whenever a client has an instance of instruction info, it should
42 /// always be able to get register info as well (through this method).
44 const Thumb2RegisterInfo &getRegisterInfo() const { return RI; }
46 bool copyRegToReg(MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator I,
48 unsigned DestReg, unsigned SrcReg,
49 const TargetRegisterClass *DestRC,
50 const TargetRegisterClass *SrcRC) const;
55 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
56 MachineBasicBlock::iterator MI,
57 const std::vector<CalleeSavedInfo> &CSI) const;
58 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
59 MachineBasicBlock::iterator MI,
60 const std::vector<CalleeSavedInfo> &CSI) const;
62 bool isMoveInstr(const MachineInstr &MI,
63 unsigned &SrcReg, unsigned &DstReg,
64 unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
65 unsigned isLoadFromStackSlot(const MachineInstr *MI,
66 int &FrameIndex) const;
67 unsigned isStoreToStackSlot(const MachineInstr *MI,
68 int &FrameIndex) const;
70 void storeRegToStackSlot(MachineBasicBlock &MBB,
71 MachineBasicBlock::iterator MBBI,
72 unsigned SrcReg, bool isKill, int FrameIndex,
73 const TargetRegisterClass *RC) const;
75 void storeRegToAddr(MachineFunction &MF, unsigned SrcReg, bool isKill,
76 SmallVectorImpl<MachineOperand> &Addr,
77 const TargetRegisterClass *RC,
78 SmallVectorImpl<MachineInstr*> &NewMIs) const;
80 void loadRegFromStackSlot(MachineBasicBlock &MBB,
81 MachineBasicBlock::iterator MBBI,
82 unsigned DestReg, int FrameIndex,
83 const TargetRegisterClass *RC) const;
85 void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
86 SmallVectorImpl<MachineOperand> &Addr,
87 const TargetRegisterClass *RC,
88 SmallVectorImpl<MachineInstr*> &NewMIs) const;
90 bool canFoldMemoryOperand(const MachineInstr *MI,
91 const SmallVectorImpl<unsigned> &Ops) const;
93 MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
95 const SmallVectorImpl<unsigned> &Ops,
96 int FrameIndex) const;
98 MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
100 const SmallVectorImpl<unsigned> &Ops,
101 MachineInstr* LoadMI) const {
109 #endif // THUMB2INSTRUCTIONINFO_H