X86FrameLowering.h revision 31d157ae1ac2cd9c787dc3c1d28e64c682803844
131d157ae1ac2cd9c787dc3c1d28e64c682803844Jia Liu//===-- X86TargetFrameLowering.h - Define frame lowering for X86 -*- C++ -*-==// 233464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// 333464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// The LLVM Compiler Infrastructure 433464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// 533464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// This file is distributed under the University of Illinois Open Source 633464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// License. See LICENSE.TXT for details. 733464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// 833464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov//===----------------------------------------------------------------------===// 933464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// 1016c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov// This class implements X86-specific bits of TargetFrameLowering class. 1133464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov// 1233464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov//===----------------------------------------------------------------------===// 1333464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 1416c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov#ifndef X86_FRAMELOWERING_H 1516c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov#define X86_FRAMELOWERING_H 1633464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 1733464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov#include "X86Subtarget.h" 186a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling#include "llvm/MC/MCDwarf.h" 1916c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov#include "llvm/Target/TargetFrameLowering.h" 2033464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 2133464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikovnamespace llvm { 2233464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov class MCSymbol; 23d9e3385ced2dc887e2fe8e1c071bd2611e4d3edeAnton Korobeynikov class X86TargetMachine; 2433464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 2516c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikovclass X86FrameLowering : public TargetFrameLowering { 26d9e3385ced2dc887e2fe8e1c071bd2611e4d3edeAnton Korobeynikov const X86TargetMachine &TM; 2733464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov const X86Subtarget &STI; 2833464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikovpublic: 2916c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov explicit X86FrameLowering(const X86TargetMachine &tm, const X86Subtarget &sti) 3016c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov : TargetFrameLowering(StackGrowsDown, 3116c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov sti.getStackAlignment(), 323f4be4fb86172e6b87a457b338483efc0c1efd05NAKAMURA Takumi (sti.is64Bit() ? -8 : -4)), 33d9e3385ced2dc887e2fe8e1c071bd2611e4d3edeAnton Korobeynikov TM(tm), STI(sti) { 3433464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov } 3533464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 3633464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov void emitCalleeSavedFrameMoves(MachineFunction &MF, MCSymbol *Label, 3733464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov unsigned FramePtr) const; 3833464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 3933464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 4033464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov /// the function. 4133464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov void emitPrologue(MachineFunction &MF) const; 4233464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; 43d0c38176690e9602a93a20a43f1bd084564a8116Anton Korobeynikov 4476927d758657b3a511c73467ec5a7288795c1513Rafael Espindola void adjustForSegmentedStacks(MachineFunction &MF) const; 4576927d758657b3a511c73467ec5a7288795c1513Rafael Espindola 4694c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 4794c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov RegScavenger *RS = NULL) const; 4894c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov 49cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 50cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov MachineBasicBlock::iterator MI, 51cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov const std::vector<CalleeSavedInfo> &CSI, 52cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov const TargetRegisterInfo *TRI) const; 53cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov 5494c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 5594c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov MachineBasicBlock::iterator MI, 5694c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov const std::vector<CalleeSavedInfo> &CSI, 5794c5ae08750f314bc3cf1bf882b686244a3927d9Anton Korobeynikov const TargetRegisterInfo *TRI) const; 58cd775ceff0b25a0b026f643a7990c2924bd310a3Anton Korobeynikov 59d0c38176690e9602a93a20a43f1bd084564a8116Anton Korobeynikov bool hasFP(const MachineFunction &MF) const; 60d0c38176690e9602a93a20a43f1bd084564a8116Anton Korobeynikov bool hasReservedCallFrame(const MachineFunction &MF) const; 61d0c38176690e9602a93a20a43f1bd084564a8116Anton Korobeynikov 6282f58740c76b42af8370247b23677a0318f6dde8Anton Korobeynikov int getFrameIndexOffset(const MachineFunction &MF, int FI) const; 6309b02c8dddf822e84c30cc08e7759d6ceebb2334Bill Wendling uint32_t getCompactUnwindEncoding(MachineFunction &MF) const; 6433464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov}; 6533464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 6633464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov} // End llvm namespace 6733464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov 6833464912237efaa0ed7060829e66b59055bdd48bAnton Korobeynikov#endif 69