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   class LiveIntervals;
20 
21   /// Spiller interface.
22   ///
23   /// Implementations are utility classes which insert spill or remat code on
24   /// demand.
25   class Spiller {
26     virtual void anchor();
27   public:
28     virtual ~Spiller() = 0;
29 
30     /// spill - Spill the LRE.getParent() live interval.
31     virtual void spill(LiveRangeEdit &LRE) = 0;
postOptimization()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 
42 #endif
43