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