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 /// emitLoadConstPool - Emits a load from constpool to materialize the
32 /// specified immediate.
33 void emitLoadConstPool(MachineBasicBlock &MBB,
34 MachineBasicBlock::iterator &MBBI,
36 unsigned DestReg, unsigned SubIdx, int Val,
37 ARMCC::CondCodes Pred = ARMCC::AL,
38 unsigned PredReg = 0) const;
40 /// Code Generation virtual methods...
41 bool hasReservedCallFrame(const MachineFunction &MF) const;
43 void eliminateCallFramePseudoInstr(MachineFunction &MF,
44 MachineBasicBlock &MBB,
45 MachineBasicBlock::iterator I) const;
47 // rewrite MI to access 'Offset' bytes from the FP. Return the offset that
48 // could not be handled directly in MI.
49 int rewriteFrameIndex(MachineInstr &MI, unsigned FrameRegIdx,
50 unsigned FrameReg, int Offset,
51 unsigned MOVOpc, unsigned ADDriOpc,
52 unsigned SUBriOpc) const;
54 bool saveScavengerRegister(MachineBasicBlock &MBB,
55 MachineBasicBlock::iterator I,
56 MachineBasicBlock::iterator &UseMI,
57 const TargetRegisterClass *RC,
59 unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
60 int SPAdj, FrameIndexValue *Value = NULL,
61 RegScavenger *RS = NULL) const;
63 void emitPrologue(MachineFunction &MF) const;
64 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
68 #endif // THUMB1REGISTERINFO_H