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27
28#ifndef V8_HYDROGEN_CHECK_ELIMINATION_H_
29#define V8_HYDROGEN_CHECK_ELIMINATION_H_
30
31#include "hydrogen.h"
32#include "hydrogen-alias-analysis.h"
33
34namespace v8 {
35namespace internal {
36
37
38// Remove CheckMaps instructions through flow- and branch-sensitive analysis.
39class HCheckEliminationPhase : public HPhase {
40 public:
41  explicit HCheckEliminationPhase(HGraph* graph)
42      : HPhase("H_Check Elimination", graph), aliasing_() {
43#ifdef DEBUG
44    redundant_ = 0;
45    removed_ = 0;
46    removed_cho_ = 0;
47    narrowed_ = 0;
48    loads_ = 0;
49    empty_ = 0;
50    compares_true_ = 0;
51    compares_false_ = 0;
52    transitions_ = 0;
53#endif
54  }
55
56  void Run();
57
58  friend class HCheckTable;
59
60 private:
61  void PrintStats();
62
63  HAliasAnalyzer* aliasing_;
64#ifdef DEBUG
65  int redundant_;
66  int removed_;
67  int removed_cho_;
68  int narrowed_;
69  int loads_;
70  int empty_;
71  int compares_true_;
72  int compares_false_;
73  int transitions_;
74#endif
75};
76
77
78} }  // namespace v8::internal
79
80#endif  // V8_HYDROGEN_CHECK_ELIMINATION_H_
81