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 LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
15 #define LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
17 #include "llvm/Target/TargetFrameLowering.h"
22 class X86TargetMachine;
25 class X86FrameLowering : public TargetFrameLowering {
27 explicit X86FrameLowering(StackDirection D, unsigned StackAl, int LAO)
28 : TargetFrameLowering(StackGrowsDown, StackAl, LAO) {}
30 static void getStackProbeFunction(const X86Subtarget &STI,
34 void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
35 MachineBasicBlock::iterator MBBI,
38 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
40 void emitPrologue(MachineFunction &MF) const override;
41 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
43 void adjustForSegmentedStacks(MachineFunction &MF) const override;
45 void adjustForHiPEPrologue(MachineFunction &MF) const override;
47 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
48 RegScavenger *RS = nullptr) const override;
51 assignCalleeSavedSpillSlots(MachineFunction &MF,
52 const TargetRegisterInfo *TRI,
53 std::vector<CalleeSavedInfo> &CSI) const override;
55 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
56 MachineBasicBlock::iterator MI,
57 const std::vector<CalleeSavedInfo> &CSI,
58 const TargetRegisterInfo *TRI) const override;
60 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
61 MachineBasicBlock::iterator MI,
62 const std::vector<CalleeSavedInfo> &CSI,
63 const TargetRegisterInfo *TRI) const override;
65 bool hasFP(const MachineFunction &MF) const override;
66 bool hasReservedCallFrame(const MachineFunction &MF) const override;
68 int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
69 int getFrameIndexReference(const MachineFunction &MF, int FI,
70 unsigned &FrameReg) const override;
72 void eliminateCallFramePseudoInstr(MachineFunction &MF,
73 MachineBasicBlock &MBB,
74 MachineBasicBlock::iterator MI) const override;
77 } // End llvm namespace