XCoreRegisterInfo.h revision 193323 
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  void eliminateFrameIndex(MachineBasicBlock::iterator II,
61                           int SPAdj, RegScavenger *RS = NULL) const;
62
63  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
64                                                RegScavenger *RS = NULL) const;
65
66  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
67
68  void emitPrologue(MachineFunction &MF) const;
69  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
70
71  // Debug information queries.
72  unsigned getRARegister() const;
73  unsigned getFrameRegister(MachineFunction &MF) const;
74  void getInitialFrameState(std::vector<MachineMove> &Moves) const;
75
76  //! Return the array of argument passing registers
77  /*!
78    \note The size of this array is returned by getArgRegsSize().
79    */
80  static const unsigned *getArgRegs(const MachineFunction *MF = 0);
81
82  //! Return the size of the argument passing register array
83  static unsigned getNumArgRegs(const MachineFunction *MF = 0);
84
85  //! Return whether to emit frame moves
86  static bool needsFrameMoves(const MachineFunction &MF);
87
88  //! Get DWARF debugging register number
89  int getDwarfRegNum(unsigned RegNum, bool isEH) const;
90};
91
92} // end namespace llvm
93
94#endif
95