Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 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_COMPILER_SELECT_LOWERING_H_ |
| 6 | #define V8_COMPILER_SELECT_LOWERING_H_ |
| 7 | |
| 8 | #include <map> |
| 9 | |
| 10 | #include "src/compiler/graph-reducer.h" |
| 11 | #include "src/zone-allocator.h" |
| 12 | |
| 13 | namespace v8 { |
| 14 | namespace internal { |
| 15 | namespace compiler { |
| 16 | |
| 17 | // Forward declarations. |
| 18 | class CommonOperatorBuilder; |
| 19 | class Graph; |
| 20 | |
| 21 | |
| 22 | // Lowers Select nodes to diamonds. |
| 23 | class SelectLowering FINAL : public Reducer { |
| 24 | public: |
| 25 | SelectLowering(Graph* graph, CommonOperatorBuilder* common); |
| 26 | ~SelectLowering(); |
| 27 | |
| 28 | Reduction Reduce(Node* node) OVERRIDE; |
| 29 | |
| 30 | private: |
| 31 | typedef std::multimap<Node*, Node*, std::less<Node*>, |
| 32 | zone_allocator<std::pair<Node* const, Node*>>> Merges; |
| 33 | |
| 34 | bool ReachableFrom(Node* const sink, Node* const source); |
| 35 | |
| 36 | CommonOperatorBuilder* common() const { return common_; } |
| 37 | Graph* graph() const { return graph_; } |
| 38 | |
| 39 | CommonOperatorBuilder* common_; |
| 40 | Graph* graph_; |
| 41 | Merges merges_; |
| 42 | }; |
| 43 | |
| 44 | } // namespace compiler |
| 45 | } // namespace internal |
| 46 | } // namespace v8 |
| 47 | |
| 48 | #endif // V8_COMPILER_SELECT_LOWERING_H_ |