1//===-- PPCRegisterInfo.h - PowerPC 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 PowerPC implementation of the TargetRegisterInfo
11// class.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef POWERPC32_REGISTERINFO_H
16#define POWERPC32_REGISTERINFO_H
17
18#include "PPC.h"
19#include <map>
20
21#define GET_REGINFO_HEADER
22#include "PPCGenRegisterInfo.inc"
23
24namespace llvm {
25class PPCSubtarget;
26class TargetInstrInfo;
27class Type;
28
29class PPCRegisterInfo : public PPCGenRegisterInfo {
30  std::map<unsigned, unsigned> ImmToIdxMap;
31  const PPCSubtarget &Subtarget;
32  const TargetInstrInfo &TII;
33public:
34  PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
35
36  /// getPointerRegClass - Return the register class to use to hold pointers.
37  /// This is used for addressing modes.
38  virtual const TargetRegisterClass *
39  getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const;
40
41  unsigned getRegPressureLimit(const TargetRegisterClass *RC,
42                               MachineFunction &MF) const;
43
44  /// Code Generation virtual methods...
45  const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
46  const unsigned *getCallPreservedMask(CallingConv::ID CC) const;
47
48  BitVector getReservedRegs(const MachineFunction &MF) const;
49
50  virtual bool avoidWriteAfterWrite(const TargetRegisterClass *RC) const;
51
52  /// requiresRegisterScavenging - We require a register scavenger.
53  /// FIXME (64-bit): Should be inlined.
54  bool requiresRegisterScavenging(const MachineFunction &MF) const;
55
56  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const;
57
58  void eliminateCallFramePseudoInstr(MachineFunction &MF,
59                                     MachineBasicBlock &MBB,
60                                     MachineBasicBlock::iterator I) const;
61
62  void lowerDynamicAlloc(MachineBasicBlock::iterator II,
63                         int SPAdj, RegScavenger *RS) const;
64  void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
65                       int SPAdj, RegScavenger *RS) const;
66  void lowerCRRestore(MachineBasicBlock::iterator II, unsigned FrameIndex,
67                       int SPAdj, RegScavenger *RS) const;
68  void eliminateFrameIndex(MachineBasicBlock::iterator II,
69                           int SPAdj, RegScavenger *RS = NULL) const;
70
71  // Debug information queries.
72  unsigned getFrameRegister(const MachineFunction &MF) const;
73
74  // Exception handling queries.
75  unsigned getEHExceptionRegister() const;
76  unsigned getEHHandlerRegister() const;
77};
78
79} // end namespace llvm
80
81#endif
82