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_LIB_CODEGEN_SPILLER_H
  11 #define LLVM_LIB_CODEGEN_SPILLER_H
  12
  13 namespace llvm {
  14
  15 class LiveRangeEdit;
  16 class MachineFunction;
  17 class MachineFunctionPass;
  18 class VirtRegMap;
  19
  20   /// Spiller interface.
  21   ///
  22   /// Implementations are utility classes which insert spill or remat code on
  23   /// demand.
  24   class Spiller {
  25     virtual void anchor();
  26
  27   public:
  28     virtual ~Spiller() = 0;
  29
  30     /// spill - Spill the LRE.getParent() live interval.
  31     virtual void spill(LiveRangeEdit &LRE) = 0;
  32
  33     virtual void postOptimization() {}
  34   };
  35
  36   /// Create and return a spiller that will insert spill code directly instead
  37   /// of deferring though VirtRegMap.
  38   Spiller *createInlineSpiller(MachineFunctionPass &pass,
  39                                MachineFunction &mf,
  40                                VirtRegMap &vrm);
  41
  42 } // end namespace llvm
  43
  44 #endif // LLVM_LIB_CODEGEN_SPILLER_H