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 "ARMRegisterInfo.h"
20 #include "llvm/Target/TargetRegisterInfo.h"
24 class ARMBaseInstrInfo;
27 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo {
29 Thumb1RegisterInfo(const ARMBaseInstrInfo &tii, const ARMSubtarget &STI);
31 const TargetRegisterClass*
32 getLargestLegalSuperClass(const TargetRegisterClass *RC) const;
34 const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const;
36 /// emitLoadConstPool - Emits a load from constpool to materialize the
37 /// specified immediate.
38 void emitLoadConstPool(MachineBasicBlock &MBB,
39 MachineBasicBlock::iterator &MBBI,
41 unsigned DestReg, unsigned SubIdx, int Val,
42 ARMCC::CondCodes Pred = ARMCC::AL,
44 unsigned MIFlags = MachineInstr::NoFlags) const;
46 /// Code Generation virtual methods...
47 void eliminateCallFramePseudoInstr(MachineFunction &MF,
48 MachineBasicBlock &MBB,
49 MachineBasicBlock::iterator I) const;
51 // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be
52 // however much remains to be handled. Return 'true' if no further
54 bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx,
55 unsigned FrameReg, int &Offset,
56 const ARMBaseInstrInfo &TII) const;
57 void resolveFrameIndex(MachineBasicBlock::iterator I,
58 unsigned BaseReg, int64_t Offset) const;
59 bool saveScavengerRegister(MachineBasicBlock &MBB,
60 MachineBasicBlock::iterator I,
61 MachineBasicBlock::iterator &UseMI,
62 const TargetRegisterClass *RC,
64 void eliminateFrameIndex(MachineBasicBlock::iterator II,
65 int SPAdj, RegScavenger *RS = NULL) const;
69 #endif // THUMB1REGISTERINFO_H