Spiller.h revision 210299
1//===-- llvm/CodeGen/Spiller.h - Spiller -*- C++ -*------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef LLVM_CODEGEN_SPILLER_H 11#define LLVM_CODEGEN_SPILLER_H 12 13#include "llvm/ADT/SmallVector.h" 14#include <vector> 15 16namespace llvm { 17 18 class LiveInterval; 19 class LiveIntervals; 20 class LiveStacks; 21 class MachineFunction; 22 class MachineInstr; 23 class MachineLoopInfo; 24 class SlotIndex; 25 class VirtRegMap; 26 class VNInfo; 27 28 /// Spiller interface. 29 /// 30 /// Implementations are utility classes which insert spill or remat code on 31 /// demand. 32 class Spiller { 33 public: 34 virtual ~Spiller() = 0; 35 36 /// spill - Spill the given live interval. The method used will depend on 37 /// the Spiller implementation selected. 38 /// 39 /// @param li The live interval to be spilled. 40 /// @param spillIs A list of intervals that are about to be spilled, 41 /// and so cannot be used for remat etc. 42 /// @param newIntervals The newly created intervals will be appended here. 43 /// @param earliestIndex The earliest point for splitting. (OK, it's another 44 /// pointer to the allocator guts). 45 virtual void spill(LiveInterval *li, 46 std::vector<LiveInterval*> &newIntervals, 47 SmallVectorImpl<LiveInterval*> &spillIs, 48 SlotIndex *earliestIndex = 0) = 0; 49 50 }; 51 52 /// Create and return a spiller object, as specified on the command line. 53 Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li, 54 const MachineLoopInfo *loopInfo, VirtRegMap *vrm); 55} 56 57#endif 58