Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_CRANKSHAFT_HYDROGEN_CHECK_ELIMINATION_H_ |
| 6 | #define V8_CRANKSHAFT_HYDROGEN_CHECK_ELIMINATION_H_ |
| 7 | |
| 8 | #include "src/crankshaft/hydrogen.h" |
| 9 | #include "src/crankshaft/hydrogen-alias-analysis.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | |
| 15 | // Remove CheckMaps instructions through flow- and branch-sensitive analysis. |
| 16 | class HCheckEliminationPhase : public HPhase { |
| 17 | public: |
| 18 | explicit HCheckEliminationPhase(HGraph* graph) |
| 19 | : HPhase("H_Check Elimination", graph), aliasing_(), |
| 20 | string_maps_(kStringMapsSize, zone()) { |
| 21 | // Compute the set of string maps. |
| 22 | #define ADD_STRING_MAP(type, size, name, Name) \ |
| 23 | string_maps_.Add(Unique<Map>::CreateImmovable( \ |
| 24 | graph->isolate()->factory()->name##_map()), zone()); |
| 25 | STRING_TYPE_LIST(ADD_STRING_MAP) |
| 26 | #undef ADD_STRING_MAP |
| 27 | DCHECK_EQ(kStringMapsSize, string_maps_.size()); |
| 28 | #ifdef DEBUG |
| 29 | redundant_ = 0; |
| 30 | removed_ = 0; |
| 31 | removed_cho_ = 0; |
| 32 | removed_cit_ = 0; |
| 33 | narrowed_ = 0; |
| 34 | loads_ = 0; |
| 35 | empty_ = 0; |
| 36 | compares_true_ = 0; |
| 37 | compares_false_ = 0; |
| 38 | transitions_ = 0; |
| 39 | #endif |
| 40 | } |
| 41 | |
| 42 | void Run(); |
| 43 | |
| 44 | friend class HCheckTable; |
| 45 | |
| 46 | private: |
| 47 | const UniqueSet<Map>* string_maps() const { return &string_maps_; } |
| 48 | |
| 49 | void PrintStats(); |
| 50 | |
| 51 | HAliasAnalyzer* aliasing_; |
| 52 | #define COUNT(type, size, name, Name) + 1 |
| 53 | static const int kStringMapsSize = 0 STRING_TYPE_LIST(COUNT); |
| 54 | #undef COUNT |
| 55 | UniqueSet<Map> string_maps_; |
| 56 | #ifdef DEBUG |
| 57 | int redundant_; |
| 58 | int removed_; |
| 59 | int removed_cho_; |
| 60 | int removed_cit_; |
| 61 | int narrowed_; |
| 62 | int loads_; |
| 63 | int empty_; |
| 64 | int compares_true_; |
| 65 | int compares_false_; |
| 66 | int transitions_; |
| 67 | #endif |
| 68 | }; |
| 69 | |
| 70 | |
| 71 | } // namespace internal |
| 72 | } // namespace v8 |
| 73 | |
| 74 | #endif // V8_CRANKSHAFT_HYDROGEN_CHECK_ELIMINATION_H_ |