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//===-- llvm/CodeGen/Spiller.h - Spiller -*- C++ -*------------------------===//
//                     The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.


#include "llvm/ADT/SmallVector.h"
#include <vector>

namespace llvm {

  class LiveInterval;
  class LiveIntervals;
  class LiveStacks;
  class MachineFunction;
  class MachineInstr;
  class MachineLoopInfo;
  class SlotIndex;
  class VirtRegMap;
  class VNInfo;

  /// Spiller interface.
  /// Implementations are utility classes which insert spill or remat code on
  /// demand.
  class Spiller {
    virtual ~Spiller() = 0;

    /// Spill the given live range. The method used will depend on the Spiller
    /// implementation selected.
    virtual std::vector<LiveInterval*> spill(LiveInterval *li,
					     SmallVectorImpl<LiveInterval*> &spillIs,
                                             SlotIndex *earliestIndex = 0) = 0;


  /// Create and return a spiller object, as specified on the command line.
  Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
                         const MachineLoopInfo *loopInfo, VirtRegMap *vrm);