XCoreRegisterInfo.h revision 198090 
1//===- XCoreRegisterInfo.h - XCore 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 XCore implementation of the MRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef XCOREREGISTERINFO_H
15#define XCOREREGISTERINFO_H
16
17#include "llvm/Target/TargetRegisterInfo.h"
18#include "XCoreGenRegisterInfo.h.inc"
19
20namespace llvm {
21
22class TargetInstrInfo;
23
24struct XCoreRegisterInfo : public XCoreGenRegisterInfo {
25private:
26  const TargetInstrInfo &TII;
27
28  void loadConstant(MachineBasicBlock &MBB,
29                  MachineBasicBlock::iterator I,
30                  unsigned DstReg, int64_t Value, DebugLoc dl) const;
31
32  void storeToStack(MachineBasicBlock &MBB,
33                  MachineBasicBlock::iterator I,
34                  unsigned SrcReg, int Offset, DebugLoc dl) const;
35
36  void loadFromStack(MachineBasicBlock &MBB,
37                  MachineBasicBlock::iterator I,
38                  unsigned DstReg, int Offset, DebugLoc dl) const;
39
40public:
41  XCoreRegisterInfo(const TargetInstrInfo &tii);
42
43  /// Code Generation virtual methods...
44
45  const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
46
47  const TargetRegisterClass* const* getCalleeSavedRegClasses(
48                                     const MachineFunction *MF = 0) const;
49
50  BitVector getReservedRegs(const MachineFunction &MF) const;
51
52  bool requiresRegisterScavenging(const MachineFunction &MF) const;
53
54  bool hasFP(const MachineFunction &MF) const;
55
56  void eliminateCallFramePseudoInstr(MachineFunction &MF,
57                                     MachineBasicBlock &MBB,
58                                     MachineBasicBlock::iterator I) const;
59
60  unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
61                               int SPAdj, int *Value = NULL,
62                               RegScavenger *RS = NULL) const;
63
64  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
65                                                RegScavenger *RS = NULL) const;
66
67  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
68
69  void emitPrologue(MachineFunction &MF) const;
70  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
71
72  // Debug information queries.
73  unsigned getRARegister() const;
74  unsigned getFrameRegister(MachineFunction &MF) const;
75  void getInitialFrameState(std::vector<MachineMove> &Moves) const;
76
77  //! Return the array of argument passing registers
78  /*!
79    \note The size of this array is returned by getArgRegsSize().
80    */
81  static const unsigned *getArgRegs(const MachineFunction *MF = 0);
82
83  //! Return the size of the argument passing register array
84  static unsigned getNumArgRegs(const MachineFunction *MF = 0);
85
86  //! Return whether to emit frame moves
87  static bool needsFrameMoves(const MachineFunction &MF);
88
89  //! Get DWARF debugging register number
90  int getDwarfRegNum(unsigned RegNum, bool isEH) const;
91};
92
93} // end namespace llvm
94
95#endif
96