X86RegisterInfo.h revision 4188699f80c233a20b6ddc61570a8a8c1804cb85 
1//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the X86 implementation of the MRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef X86REGISTERINFO_H
15#define X86REGISTERINFO_H
16
17#include "llvm/Target/MRegisterInfo.h"
18
19class llvm::Type;
20
21#include "X86GenRegisterInfo.h.inc"
22
23namespace llvm {
24
25struct X86RegisterInfo : public X86GenRegisterInfo {
26  X86RegisterInfo();
27
28  /// Code Generation virtual methods...
29  void storeRegToStackSlot(MachineBasicBlock &MBB,
30                           MachineBasicBlock::iterator MI,
31                           unsigned SrcReg, int FrameIndex,
32                           const TargetRegisterClass *RC) const;
33
34  void loadRegFromStackSlot(MachineBasicBlock &MBB,
35                            MachineBasicBlock::iterator MI,
36                            unsigned DestReg, int FrameIndex,
37                            const TargetRegisterClass *RC) const;
38
39  void copyRegToReg(MachineBasicBlock &MBB,
40                    MachineBasicBlock::iterator MI,
41                    unsigned DestReg, unsigned SrcReg,
42                    const TargetRegisterClass *RC) const;
43
44  /// foldMemoryOperand - If this target supports it, fold a load or store of
45  /// the specified stack slot into the specified machine instruction for the
46  /// specified operand.  If this is possible, the target should perform the
47  /// folding and return true, otherwise it should return false.  If it folds
48  /// the instruction, it is likely that the MachineInstruction the iterator
49  /// references has been changed.
50  virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
51                                          unsigned OpNum,
52                                          int FrameIndex) const;
53
54
55  void eliminateCallFramePseudoInstr(MachineFunction &MF,
56                                     MachineBasicBlock &MBB,
57                                     MachineBasicBlock::iterator MI) const;
58
59  void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
60
61  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
62
63  void emitPrologue(MachineFunction &MF) const;
64  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
65
66  // Debug information queries.
67  unsigned getRARegister() const;
68  unsigned getFrameRegister(MachineFunction &MF) const;
69};
70
71} // End llvm namespace
72
73#endif
74