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 75
