Spiller.h revision 199511 
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 "llvm/ADT/SmallVector.h"
14#include <vector>
15
16namespace llvm {
17
18  class LiveInterval;
19  class LiveIntervals;
20  class LiveStacks;
21  class MachineFunction;
22  class MachineInstr;
23  class MachineLoopInfo;
24  class VirtRegMap;
25  class VNInfo;
26
27  /// Spiller interface.
28  ///
29  /// Implementations are utility classes which insert spill or remat code on
30  /// demand.
31  class Spiller {
32  public:
33    virtual ~Spiller() = 0;
34
35    /// Spill the given live range. The method used will depend on the Spiller
36    /// implementation selected.
37    virtual std::vector<LiveInterval*> spill(LiveInterval *li,
38                                   SmallVectorImpl<LiveInterval*> &spillIs) = 0;
39
40  };
41
42  /// Create and return a spiller object, as specified on the command line.
43  Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
44                         LiveStacks *ls, const MachineLoopInfo *loopInfo,
45                         VirtRegMap *vrm);
46}
47
48#endif
49