1//=- MBlazeFrameLowering.h - Define frame lowering for MicroBlaze -*- 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// 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef MBLAZE_FRAMEINFO_H 15#define MBLAZE_FRAMEINFO_H 16 17#include "MBlaze.h" 18#include "llvm/Target/TargetFrameLowering.h" 19 20namespace llvm { 21class MBlazeSubtarget; 22 23class MBlazeFrameLowering : public TargetFrameLowering { 24protected: 25 const MBlazeSubtarget &STI; 26 27public: 28 explicit MBlazeFrameLowering(const MBlazeSubtarget &sti) 29 : TargetFrameLowering(TargetFrameLowering::StackGrowsUp, 4, 0), STI(sti) { 30 } 31 32 /// targetHandlesStackFrameRounding - Returns true if the target is 33 /// responsible for rounding up the stack frame (probably at emitPrologue 34 /// time). 35 bool targetHandlesStackFrameRounding() const { return true; } 36 37 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 38 /// the function. 39 void emitPrologue(MachineFunction &MF) const; 40 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; 41 42 void eliminateCallFramePseudoInstr(MachineFunction &MF, 43 MachineBasicBlock &MBB, 44 MachineBasicBlock::iterator I) const; 45 46 bool hasFP(const MachineFunction &MF) const; 47 48 int getFrameIndexOffset(const MachineFunction &MF, int FI) const; 49 50 virtual void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 51 RegScavenger *RS) const; 52}; 53 54} // End llvm namespace 55 56#endif 57