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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.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_SPILLER_H
#define LLVM_CODEGEN_SPILLER_H
#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 {
public:
virtual ~Spiller() = 0;
/// spill - Spill the given live interval. The method used will depend on
/// the Spiller implementation selected.
///
/// @param li The live interval to be spilled.
/// @param spillIs A list of intervals that are about to be spilled,
/// and so cannot be used for remat etc.
/// @param newIntervals The newly created intervals will be appended here.
/// @param earliestIndex The earliest point for splitting. (OK, it's another
/// pointer to the allocator guts).
virtual void spill(LiveInterval *li,
std::vector<LiveInterval*> &newIntervals,
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);
}
#endif
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