Spiller.h revision 212904
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 15namespace llvm { 16 17 class LiveInterval; 18 class MachineFunction; 19 class MachineFunctionPass; 20 class SlotIndex; 21 class VirtRegMap; 22 23 /// Spiller interface. 24 /// 25 /// Implementations are utility classes which insert spill or remat code on 26 /// demand. 27 class Spiller { 28 public: 29 virtual ~Spiller() = 0; 30 31 /// spill - Spill the given live interval. The method used will depend on 32 /// the Spiller implementation selected. 33 /// 34 /// @param li The live interval to be spilled. 35 /// @param spillIs A list of intervals that are about to be spilled, 36 /// and so cannot be used for remat etc. 37 /// @param newIntervals The newly created intervals will be appended here. 38 virtual void spill(LiveInterval *li, 39 SmallVectorImpl<LiveInterval*> &newIntervals, 40 SmallVectorImpl<LiveInterval*> &spillIs) = 0; 41 42 }; 43 44 /// Create and return a spiller object, as specified on the command line. 45 Spiller* createSpiller(MachineFunctionPass &pass, 46 MachineFunction &mf, 47 VirtRegMap &vrm); 48} 49 50#endif 51