| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_HYDROGEN_CHECK_ELIMINATION_H_ |
| #define V8_HYDROGEN_CHECK_ELIMINATION_H_ |
| |
| #include "src/hydrogen.h" |
| #include "src/hydrogen-alias-analysis.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Remove CheckMaps instructions through flow- and branch-sensitive analysis. |
| class HCheckEliminationPhase : public HPhase { |
| public: |
| explicit HCheckEliminationPhase(HGraph* graph) |
| : HPhase("H_Check Elimination", graph), aliasing_(), |
| string_maps_(kStringMapsSize, zone()) { |
| // Compute the set of string maps. |
| #define ADD_STRING_MAP(type, size, name, Name) \ |
| string_maps_.Add(Unique<Map>::CreateImmovable( \ |
| graph->isolate()->factory()->name##_map()), zone()); |
| STRING_TYPE_LIST(ADD_STRING_MAP) |
| #undef ADD_STRING_MAP |
| DCHECK_EQ(kStringMapsSize, string_maps_.size()); |
| #ifdef DEBUG |
| redundant_ = 0; |
| removed_ = 0; |
| removed_cho_ = 0; |
| removed_cit_ = 0; |
| narrowed_ = 0; |
| loads_ = 0; |
| empty_ = 0; |
| compares_true_ = 0; |
| compares_false_ = 0; |
| transitions_ = 0; |
| #endif |
| } |
| |
| void Run(); |
| |
| friend class HCheckTable; |
| |
| private: |
| const UniqueSet<Map>* string_maps() const { return &string_maps_; } |
| |
| void PrintStats(); |
| |
| HAliasAnalyzer* aliasing_; |
| #define COUNT(type, size, name, Name) + 1 |
| static const int kStringMapsSize = 0 STRING_TYPE_LIST(COUNT); |
| #undef COUNT |
| UniqueSet<Map> string_maps_; |
| #ifdef DEBUG |
| int redundant_; |
| int removed_; |
| int removed_cho_; |
| int removed_cit_; |
| int narrowed_; |
| int loads_; |
| int empty_; |
| int compares_true_; |
| int compares_false_; |
| int transitions_; |
| #endif |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_HYDROGEN_CHECK_ELIMINATION_H_ |