lib/Target/Mips/MipsFrameLowering.h

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

#ifndef MIPS_FRAMEINFO_H
#define MIPS_FRAMEINFO_H

#include "Mips.h"
#include "MipsSubtarget.h"
#include "llvm/Target/TargetFrameLowering.h"

namespace llvm {
  class MipsSubtarget;

class MipsFrameLowering : public TargetFrameLowering {
protected:
  const MipsSubtarget &STI;

public:
  explicit MipsFrameLowering(const MipsSubtarget &sti)
    : TargetFrameLowering(StackGrowsDown, sti.hasMips64() ? 16 : 8, 0),
      STI(sti) {
  }

  bool targetHandlesStackFrameRounding() const;

  /// 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 spillCalleeSavedRegisters(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MI,
                                 const std::vector<CalleeSavedInfo> &CSI,
                                 const TargetRegisterInfo *TRI) const;

  bool hasFP(const MachineFunction &MF) const;

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

} // End llvm namespace

#endif