1 //===- Thumb1RegisterInfo.h - Thumb-1 Register Information Impl -*- 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-1 implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef THUMB1REGISTERINFO_H
16 #define THUMB1REGISTERINFO_H
19 #include "ARMBaseRegisterInfo.h"
20 #include "llvm/Target/TargetRegisterInfo.h"
24 class ARMBaseInstrInfo;
26 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo {
28 Thumb1RegisterInfo(const ARMSubtarget &STI);
30 const TargetRegisterClass *
31 getLargestLegalSuperClass(const TargetRegisterClass *RC) const override;
33 const TargetRegisterClass *
34 getPointerRegClass(const MachineFunction &MF,
35 unsigned Kind = 0) const override;
37 /// emitLoadConstPool - Emits a load from constpool to materialize the
38 /// specified immediate.
40 emitLoadConstPool(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
41 DebugLoc dl, unsigned DestReg, unsigned SubIdx, int Val,
42 ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0,
43 unsigned MIFlags = MachineInstr::NoFlags) const override;
45 // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be
46 // however much remains to be handled. Return 'true' if no further
48 bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx,
49 unsigned FrameReg, int &Offset,
50 const ARMBaseInstrInfo &TII) const;
51 void resolveFrameIndex(MachineBasicBlock::iterator I,
52 unsigned BaseReg, int64_t Offset) const override;
53 bool saveScavengerRegister(MachineBasicBlock &MBB,
54 MachineBasicBlock::iterator I,
55 MachineBasicBlock::iterator &UseMI,
56 const TargetRegisterClass *RC,
57 unsigned Reg) const override;
58 void eliminateFrameIndex(MachineBasicBlock::iterator II,
59 int SPAdj, unsigned FIOperandNum,
60 RegScavenger *RS = NULL) const override;
64 #endif // THUMB1REGISTERINFO_H