1 //===-- X86TargetFrameLowering.h - Define frame lowering for X86 -*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class implements X86-specific bits of TargetFrameLowering class.
12 //===----------------------------------------------------------------------===//
14 #ifndef X86_FRAMELOWERING_H
15 #define X86_FRAMELOWERING_H
17 #include "X86Subtarget.h"
18 #include "llvm/Target/TargetFrameLowering.h"
23 class X86TargetMachine;
25 class X86FrameLowering : public TargetFrameLowering {
26 const X86Subtarget &STI;
28 explicit X86FrameLowering(const X86Subtarget &sti)
29 : TargetFrameLowering(StackGrowsDown,
30 sti.getStackAlignment(),
31 (sti.is64Bit() ? -8 : -4)),
35 void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
36 MachineBasicBlock::iterator MBBI, DebugLoc DL,
37 unsigned FramePtr) const;
39 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
41 void emitPrologue(MachineFunction &MF) const override;
42 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
44 void adjustForSegmentedStacks(MachineFunction &MF) const override;
46 void adjustForHiPEPrologue(MachineFunction &MF) const override;
48 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
49 RegScavenger *RS = nullptr) const override;
51 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
52 MachineBasicBlock::iterator MI,
53 const std::vector<CalleeSavedInfo> &CSI,
54 const TargetRegisterInfo *TRI) const override;
56 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
57 MachineBasicBlock::iterator MI,
58 const std::vector<CalleeSavedInfo> &CSI,
59 const TargetRegisterInfo *TRI) const override;
61 bool hasFP(const MachineFunction &MF) const override;
62 bool hasReservedCallFrame(const MachineFunction &MF) const override;
64 int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
65 int getFrameIndexReference(const MachineFunction &MF, int FI,
66 unsigned &FrameReg) const override;
68 void eliminateCallFramePseudoInstr(MachineFunction &MF,
69 MachineBasicBlock &MBB,
70 MachineBasicBlock::iterator MI) const override;
73 } // End llvm namespace