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 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   public:
  26     virtual ~Spiller() = 0;
  27
  28     /// spill - Spill the LRE.getParent() live interval.
  29     virtual void spill(LiveRangeEdit &LRE) = 0;
  30
  31   };
  32
  33   /// Create and return a spiller object, as specified on the command line.
  34   Spiller* createSpiller(MachineFunctionPass &pass,
  35                          MachineFunction &mf,
  36                          VirtRegMap &vrm);
  37
  38   /// Create and return a spiller that will insert spill code directly instead
  39   /// of deferring though VirtRegMap.
  40   Spiller *createInlineSpiller(MachineFunctionPass &pass,
  41                                MachineFunction &mf,
  42                                VirtRegMap &vrm);
  43
  44 }
  45
  46 #endif