Thumb2RegisterInfo.h revision 77521f5232e679aa3de10aaaed2464aa91d7ff55 
1//===- Thumb2RegisterInfo.h - Thumb-2 Register Information Impl ----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the Thumb-2 implementation of the TargetRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef THUMB2REGISTERINFO_H
15#define THUMB2REGISTERINFO_H
16
17#include "ARM.h"
18#include "ARMRegisterInfo.h"
19#include "llvm/Target/TargetRegisterInfo.h"
20
21namespace llvm {
22  class ARMSubtarget;
23  class ARMBaseInstrInfo;
24  class Type;
25
26struct Thumb2RegisterInfo : public ARMBaseRegisterInfo {
27public:
28  Thumb2RegisterInfo(const ARMBaseInstrInfo &tii, const ARMSubtarget &STI);
29
30  /// emitLoadConstPool - Emits a load from constpool to materialize the
31  /// specified immediate.
32 void emitLoadConstPool(MachineBasicBlock &MBB,
33                        MachineBasicBlock::iterator &MBBI,
34                        DebugLoc dl,
35                        unsigned DestReg, int Val,
36                        ARMCC::CondCodes Pred = ARMCC::AL,
37                        unsigned PredReg = 0) const;
38
39  /// Code Generation virtual methods...
40  const TargetRegisterClass *
41    getPhysicalRegisterRegClass(unsigned Reg, MVT VT = MVT::Other) const;
42
43  bool requiresRegisterScavenging(const MachineFunction &MF) const;
44
45  bool hasReservedCallFrame(MachineFunction &MF) const;
46
47  void eliminateCallFramePseudoInstr(MachineFunction &MF,
48                                     MachineBasicBlock &MBB,
49                                     MachineBasicBlock::iterator I) const;
50
51  void eliminateFrameIndex(MachineBasicBlock::iterator II,
52                           int SPAdj, RegScavenger *RS = NULL) const;
53
54  void emitPrologue(MachineFunction &MF) const;
55  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
56};
57}
58
59#endif // THUMB2REGISTERINFO_H
60