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 const TargetRegisterClass *
42 getPhysicalRegisterRegClass(unsigned Reg, EVT VT = MVT::Other) const;
44 bool hasReservedCallFrame(MachineFunction &MF) const;
46 void eliminateCallFramePseudoInstr(MachineFunction &MF,
47 MachineBasicBlock &MBB,
48 MachineBasicBlock::iterator I) const;
50 // rewrite MI to access 'Offset' bytes from the FP. Return the offset that
51 // could not be handled directly in MI.
52 int rewriteFrameIndex(MachineInstr &MI, unsigned FrameRegIdx,
53 unsigned FrameReg, int Offset,
54 unsigned MOVOpc, unsigned ADDriOpc, unsigned SUBriOpc) const;
56 bool saveScavengerRegister(MachineBasicBlock &MBB,
57 MachineBasicBlock::iterator I,
58 MachineBasicBlock::iterator &UseMI,
59 const TargetRegisterClass *RC,
61 unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
62 int SPAdj, int *Value = NULL,
63 RegScavenger *RS = NULL) const;
65 void emitPrologue(MachineFunction &MF) const;
66 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
70 #endif // THUMB1REGISTERINFO_H