lib/Target/Blackfin/BlackfinFrameLowering.h

//=- BlackfinFrameLowering.h - Define frame lowering for Blackfin -*- C++ -*-=//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//
//===----------------------------------------------------------------------===//

#ifndef BLACKFIN_FRAMEINFO_H
#define BLACKFIN_FRAMEINFO_H

#include "Blackfin.h"
#include "BlackfinSubtarget.h"
#include "llvm/Target/TargetFrameLowering.h"

namespace llvm {
  class BlackfinSubtarget;

class BlackfinFrameLowering : public TargetFrameLowering {
protected:
  const BlackfinSubtarget &STI;

public:
  explicit BlackfinFrameLowering(const BlackfinSubtarget &sti)
    : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), STI(sti) {
  }

  /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  /// the function.
  void emitPrologue(MachineFunction &MF) const;
  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;

  bool hasFP(const MachineFunction &MF) const;
  bool hasReservedCallFrame(const MachineFunction &MF) const;

  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
                                            RegScavenger *RS) const;
};

} // End llvm namespace

#endif