Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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_ALL_NODES_H_ |
| 6 | #define V8_COMPILER_ALL_NODES_H_ |
| 7 | |
| 8 | #include "src/compiler/node.h" |
| 9 | #include "src/zone-containers.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | namespace compiler { |
| 14 | |
| 15 | // A helper utility that traverses the graph and gathers all nodes reachable |
| 16 | // from end. |
| 17 | class AllNodes { |
| 18 | public: |
| 19 | // Constructor. Traverses the graph and builds the {live} sets. |
| 20 | AllNodes(Zone* local_zone, const Graph* graph); |
| 21 | |
| 22 | bool IsLive(Node* node) { |
| 23 | if (!node) return false; |
| 24 | size_t id = node->id(); |
| 25 | return id < is_live.size() && is_live[id]; |
| 26 | } |
| 27 | |
| 28 | NodeVector live; // Nodes reachable from end. |
| 29 | |
| 30 | private: |
| 31 | BoolVector is_live; |
| 32 | }; |
| 33 | |
| 34 | } // namespace compiler |
| 35 | } // namespace internal |
| 36 | } // namespace v8 |
| 37 | |
| 38 | #endif // V8_COMPILER_ALL_NODES_H_ |