Re-apply r211399, "Generate native unwind info on Win64" with a fix to ignore SEH...
[oota-llvm.git] / lib / Target / X86 / X86FrameLowering.h
1 //===-- X86TargetFrameLowering.h - Define frame lowering for X86 -*- 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 class implements X86-specific bits of TargetFrameLowering class.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef X86_FRAMELOWERING_H
15 #define X86_FRAMELOWERING_H
16
17 #include "llvm/Target/TargetFrameLowering.h"
18
19 namespace llvm {
20
21 class MCSymbol;
22 class X86TargetMachine;
23
24 class X86FrameLowering : public TargetFrameLowering {
25 public:
26   explicit X86FrameLowering(StackDirection D, unsigned StackAl, int LAO)
27     : TargetFrameLowering(StackGrowsDown, StackAl, LAO) {}
28
29   void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
30                                  MachineBasicBlock::iterator MBBI,
31                                  DebugLoc DL) const;
32
33   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
34   /// the function.
35   void emitPrologue(MachineFunction &MF) const override;
36   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
37
38   void adjustForSegmentedStacks(MachineFunction &MF) const override;
39
40   void adjustForHiPEPrologue(MachineFunction &MF) const override;
41
42   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
43                                      RegScavenger *RS = nullptr) const override;
44
45   bool
46   assignCalleeSavedSpillSlots(MachineFunction &MF,
47                               const TargetRegisterInfo *TRI,
48                               std::vector<CalleeSavedInfo> &CSI) const override;
49
50   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
51                                  MachineBasicBlock::iterator MI,
52                                  const std::vector<CalleeSavedInfo> &CSI,
53                                  const TargetRegisterInfo *TRI) const override;
54
55   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
56                                   MachineBasicBlock::iterator MI,
57                                   const std::vector<CalleeSavedInfo> &CSI,
58                                   const TargetRegisterInfo *TRI) const override;
59
60   bool hasFP(const MachineFunction &MF) const override;
61   bool hasReservedCallFrame(const MachineFunction &MF) const override;
62
63   int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
64   int getFrameIndexReference(const MachineFunction &MF, int FI,
65                              unsigned &FrameReg) const override;
66
67   void eliminateCallFramePseudoInstr(MachineFunction &MF,
68                                  MachineBasicBlock &MBB,
69                                  MachineBasicBlock::iterator MI) const override;
70 };
71
72 } // End llvm namespace
73
74 #endif