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 LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H
16 #define LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H
18 #include "ARMBaseRegisterInfo.h"
19 #include "llvm/Target/TargetRegisterInfo.h"
23 class ARMBaseInstrInfo;
25 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo {
27 Thumb1RegisterInfo(const ARMSubtarget &STI);
29 const TargetRegisterClass *
30 getLargestLegalSuperClass(const TargetRegisterClass *RC) const override;
32 const TargetRegisterClass *
33 getPointerRegClass(const MachineFunction &MF,
34 unsigned Kind = 0) const override;
36 /// emitLoadConstPool - Emits a load from constpool to materialize the
37 /// specified immediate.
39 emitLoadConstPool(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
40 DebugLoc dl, unsigned DestReg, unsigned SubIdx, int Val,
41 ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0,
42 unsigned MIFlags = MachineInstr::NoFlags) const override;
44 // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be
45 // however much remains to be handled. Return 'true' if no further
47 bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx,
48 unsigned FrameReg, int &Offset,
49 const ARMBaseInstrInfo &TII) const;
50 void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg,
51 int64_t Offset) const override;
52 bool saveScavengerRegister(MachineBasicBlock &MBB,
53 MachineBasicBlock::iterator I,
54 MachineBasicBlock::iterator &UseMI,
55 const TargetRegisterClass *RC,
56 unsigned Reg) const override;
57 void eliminateFrameIndex(MachineBasicBlock::iterator II,
58 int SPAdj, unsigned FIOperandNum,
59 RegScavenger *RS = nullptr) const override;