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  1. //===- llvm/CodeGen/Spiller.h - Spiller -------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8.  
  9. #ifndef LLVM_CODEGEN_SPILLER_H
  10. #define LLVM_CODEGEN_SPILLER_H
  11.  
  12. namespace llvm {
  13.  
  14. class LiveRangeEdit;
  15. class MachineFunction;
  16. class MachineFunctionPass;
  17. class VirtRegMap;
  18. class VirtRegAuxInfo;
  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, MachineFunction &MF,
  39.                              VirtRegMap &VRM, VirtRegAuxInfo &VRAI);
  40.  
  41. } // end namespace llvm
  42.  
  43. #endif // LLVM_CODEGEN_SPILLER_H
  44.