lib/CodeGen/Spiller.h

   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 <vector>
  14
  15 namespace llvm {
  16
  17   class LiveInterval;
  18   class LiveIntervals;
  19   class LiveStacks;
  20   class MachineFunction;
  21   class MachineInstr;
  22   class VirtRegMap;
  23   class VNInfo;
  24
  25   /// Spiller interface.
  26   ///
  27   /// Implementations are utility classes which insert spill or remat code on
  28   /// demand.
  29   class Spiller {
  30   public:
  31     virtual ~Spiller() = 0;
  32
  33     /// Spill the given live range. The method used will depend on the Spiller
  34     /// implementation selected.
  35     virtual std::vector<LiveInterval*> spill(LiveInterval *li) = 0;
  36
  37     /// Intra-block split.
  38     virtual std::vector<LiveInterval*> intraBlockSplit(LiveInterval *li,
  39                                                        VNInfo *valno) = 0;
  40
  41   };
  42
  43   /// Create and return a spiller object, as specified on the command line.
  44   Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
  45                          LiveStacks *ls, VirtRegMap *vrm);
  46 }
  47
  48 #endif