Spiller.h revision 200581 
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 SlotIndex;
25  class VirtRegMap;
26  class VNInfo;
27
28  /// Spiller interface.
29  ///
30  /// Implementations are utility classes which insert spill or remat code on
31  /// demand.
32  class Spiller {
33  public:
34    virtual ~Spiller() = 0;
35
36    /// Spill the given live range. The method used will depend on the Spiller
37    /// implementation selected.
38    virtual std::vector<LiveInterval*> spill(LiveInterval *li,
39					     SmallVectorImpl<LiveInterval*> &spillIs,
40                                             SlotIndex *earliestIndex = 0) = 0;
41
42  };
43
44  /// Create and return a spiller object, as specified on the command line.
45  Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
46                         const MachineLoopInfo *loopInfo, VirtRegMap *vrm);
47}
48
49#endif
50