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 19namespace llvm { 20 21class MCSymbol; 22class X86TargetMachine; 23 24class X86FrameLowering : public TargetFrameLowering { 25public: 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 75