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"
22 class X86TargetMachine;
24 class X86FrameLowering : public TargetFrameLowering {
25 const X86TargetMachine &TM;
26 const X86Subtarget &STI;
28 explicit X86FrameLowering(const X86TargetMachine &tm, const X86Subtarget &sti)
29 : TargetFrameLowering(StackGrowsDown,
30 sti.getStackAlignment(),
31 (sti.is64Bit() ? -8 : -4)),
35 void emitCalleeSavedFrameMoves(MachineFunction &MF, MCSymbol *Label,
36 unsigned FramePtr) const;
38 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
40 void emitPrologue(MachineFunction &MF) const;
41 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
43 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
44 RegScavenger *RS = NULL) const;
46 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator MI,
48 const std::vector<CalleeSavedInfo> &CSI,
49 const TargetRegisterInfo *TRI) const;
51 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
52 MachineBasicBlock::iterator MI,
53 const std::vector<CalleeSavedInfo> &CSI,
54 const TargetRegisterInfo *TRI) const;
56 bool hasFP(const MachineFunction &MF) const;
57 bool hasReservedCallFrame(const MachineFunction &MF) const;
59 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
60 int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
63 } // End llvm namespace