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_LOOP_PEELING_H_ |
| 6 | #define V8_COMPILER_LOOP_PEELING_H_ |
| 7 | |
| 8 | #include "src/compiler/loop-analysis.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | namespace compiler { |
| 13 | |
| 14 | // Represents the output of peeling a loop, which is basically the mapping |
| 15 | // from the body of the loop to the corresponding nodes in the peeled |
| 16 | // iteration. |
| 17 | class PeeledIteration : public ZoneObject { |
| 18 | public: |
| 19 | // Maps {node} to its corresponding copy in the peeled iteration, if |
| 20 | // the node was part of the body of the loop. Returns {node} otherwise. |
| 21 | Node* map(Node* node); |
| 22 | |
| 23 | protected: |
| 24 | PeeledIteration() {} |
| 25 | }; |
| 26 | |
| 27 | class CommonOperatorBuilder; |
| 28 | |
| 29 | // Implements loop peeling. |
| 30 | class LoopPeeler { |
| 31 | public: |
| 32 | static bool CanPeel(LoopTree* loop_tree, LoopTree::Loop* loop); |
| 33 | static PeeledIteration* Peel(Graph* graph, CommonOperatorBuilder* common, |
| 34 | LoopTree* loop_tree, LoopTree::Loop* loop, |
| 35 | Zone* tmp_zone); |
| 36 | }; |
| 37 | |
| 38 | |
| 39 | } // namespace compiler |
| 40 | } // namespace internal |
| 41 | } // namespace v8 |
| 42 | |
| 43 | #endif // V8_COMPILER_LOOP_PEELING_H_ |