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3b3f37f51a
vector instead. This avoids needless copying and allocation. Add documentation. llvm-svn: 106788
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//===-- llvm/CodeGen/Spiller.h - Spiller -*- C++ -*------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_SPILLER_H
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#define LLVM_CODEGEN_SPILLER_H
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#include "llvm/ADT/SmallVector.h"
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#include <vector>
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namespace llvm {
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class LiveInterval;
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class LiveIntervals;
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class LiveStacks;
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class MachineFunction;
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class MachineInstr;
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class MachineLoopInfo;
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class SlotIndex;
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class VirtRegMap;
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class VNInfo;
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/// Spiller interface.
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///
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/// Implementations are utility classes which insert spill or remat code on
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/// demand.
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class Spiller {
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public:
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virtual ~Spiller() = 0;
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/// spill - Spill the given live interval. The method used will depend on
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/// the Spiller implementation selected.
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///
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/// @param li The live interval to be spilled.
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/// @param spillIs An essential hook into the register allocator guts
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/// that perhaps serves a purpose(?!)
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/// @param newIntervals The newly created intervals will be appended here.
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/// @param earliestIndex The earliest point for splitting. (OK, it's another
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/// pointer to the allocator guts).
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virtual void spill(LiveInterval *li,
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std::vector<LiveInterval*> &newIntervals,
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SmallVectorImpl<LiveInterval*> &spillIs,
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SlotIndex *earliestIndex = 0) = 0;
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};
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/// Create and return a spiller object, as specified on the command line.
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Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
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const MachineLoopInfo *loopInfo, VirtRegMap *vrm);
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}
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#endif
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