lib/CodeGen/Spiller.h

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