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| 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_HYDROGEN_OSR_H_ | |
| 6 #define V8_HYDROGEN_OSR_H_ | |
| 7 | |
| 8 #include "src/hydrogen.h" | |
| 9 #include "src/ast.h" | |
| 10 #include "src/zone.h" | |
| 11 | |
| 12 namespace v8 { | |
| 13 namespace internal { | |
| 14 | |
| 15 // Responsible for building graph parts related to OSR and otherwise | |
| 16 // setting up the graph to do an OSR compile. | |
| 17 class HOsrBuilder : public ZoneObject { | |
| 18 public: | |
| 19 explicit HOsrBuilder(HOptimizedGraphBuilder* builder) | |
| 20 : unoptimized_frame_slots_(0), | |
| 21 builder_(builder), | |
| 22 osr_entry_(NULL), | |
| 23 osr_loop_entry_(NULL), | |
| 24 osr_values_(NULL) { } | |
| 25 | |
| 26 // Creates the loop entry block for the given statement, setting up OSR | |
| 27 // entries as necessary, and sets the current block to the new block. | |
| 28 HBasicBlock* BuildOsrLoopEntry(IterationStatement* statement); | |
| 29 | |
| 30 // Process the hydrogen graph after it has been completed, performing | |
| 31 // any OSR-specific cleanups or changes. | |
| 32 void FinishGraph(); | |
| 33 | |
| 34 // Process the OSR values and phis after initial graph optimization. | |
| 35 void FinishOsrValues(); | |
| 36 | |
| 37 // Return the number of slots in the unoptimized frame at the entry to OSR. | |
| 38 int UnoptimizedFrameSlots() const { | |
| 39 return unoptimized_frame_slots_; | |
| 40 } | |
| 41 | |
| 42 bool HasOsrEntryAt(IterationStatement* statement); | |
| 43 | |
| 44 private: | |
| 45 int unoptimized_frame_slots_; | |
| 46 HOptimizedGraphBuilder* builder_; | |
| 47 HBasicBlock* osr_entry_; | |
| 48 HBasicBlock* osr_loop_entry_; | |
| 49 ZoneList<HUnknownOSRValue*>* osr_values_; | |
| 50 }; | |
| 51 | |
| 52 } // namespace internal | |
| 53 } // namespace v8 | |
| 54 | |
| 55 #endif // V8_HYDROGEN_OSR_H_ | |
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