Spiller.h revision 4eb8fc810fa14930119df9adbde2d92da08fb98c 
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#include <vector>
14
15namespace llvm {
16  class LiveInterval;
17  class LiveIntervals;
18  class LiveStacks;
19  class MachineFunction;
20  class VirtRegMap;
21  class MachineInstr;
22
23  /// Spiller interface.
24  ///
25  /// Implementations are utility classes which insert spill or remat code on
26  /// demand.
27  class Spiller {
28  public:
29    virtual ~Spiller() = 0;
30
31    /// Spill the given live range. The method used will depend on the Spiller
32    /// implementation selected.
33    virtual std::vector<LiveInterval*> spill(LiveInterval *li) = 0;
34
35  };
36
37  /// Create and return a spiller object, as specified on the command line.
38  Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
39                         LiveStacks *ls, VirtRegMap *vrm);
40}
41
42#endif
43