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
13namespace 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    virtual void anchor();
26  public:
27    virtual ~Spiller() = 0;
28
29    /// spill - Spill the LRE.getParent() live interval.
30    virtual void spill(LiveRangeEdit &LRE) = 0;
31
32  };
33
34  /// Create and return a spiller object, as specified on the command line.
35  Spiller* createSpiller(MachineFunctionPass &pass,
36                         MachineFunction &mf,
37                         VirtRegMap &vrm);
38
39  /// Create and return a spiller that will insert spill code directly instead
40  /// of deferring though VirtRegMap.
41  Spiller *createInlineSpiller(MachineFunctionPass &pass,
42                               MachineFunction &mf,
43                               VirtRegMap &vrm);
44
45}
46
47#endif
48