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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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525 } | 525 } |
526 | 526 |
527 | 527 |
528 // Add an object to the supplied environment and object materialization list. | 528 // Add an object to the supplied environment and object materialization list. |
529 // | 529 // |
530 // Notes: | 530 // Notes: |
531 // | 531 // |
532 // We are building three lists here: | 532 // We are building three lists here: |
533 // | 533 // |
534 // 1. In the result->object_mapping_ list (added to by the | 534 // 1. In the result->object_mapping_ list (added to by the |
535 // LEnvironment::Add*Object methods), we store the lengths (number | 535 // LEnvironment::Add*Object methods), we store the lengths (number |
536 // of fields) of the captured objects in depth-first traversal order, or | 536 // of fields) of the captured objects in depth-first traversal order, or |
537 // in case of duplicated objects, we store the index to the duplicate object | 537 // in case of duplicated objects, we store the index to the duplicate object |
538 // (with a tag to differentiate between captured and duplicated objects). | 538 // (with a tag to differentiate between captured and duplicated objects). |
539 // | 539 // |
540 // 2. The object fields are stored in the result->values_ list | 540 // 2. The object fields are stored in the result->values_ list |
541 // (added to by the LEnvironment.AddValue method) sequentially as lists | 541 // (added to by the LEnvironment.AddValue method) sequentially as lists |
542 // of fields with holes for nested objects (the holes will be expanded | 542 // of fields with holes for nested objects (the holes will be expanded |
543 // later by LCodegen::AddToTranslation according to the | 543 // later by LCodegen::AddToTranslation according to the |
544 // LEnvironment.object_mapping_ list). | 544 // LEnvironment.object_mapping_ list). |
545 // | 545 // |
546 // 3. The auxiliary objects_to_materialize array stores the hydrogen values | 546 // 3. The auxiliary objects_to_materialize array stores the hydrogen values |
547 // in the same order as result->object_mapping_ list. This is used | 547 // in the same order as result->object_mapping_ list. This is used |
548 // to detect duplicate values and calculate the corresponding object index. | 548 // to detect duplicate values and calculate the corresponding object index. |
549 void LChunkBuilderBase::AddObjectToMaterialize(HValue* value, | 549 void LChunkBuilderBase::AddObjectToMaterialize(HValue* value, |
550 ZoneList<HValue*>* objects_to_materialize, LEnvironment* result) { | 550 ZoneList<HValue*>* objects_to_materialize, LEnvironment* result) { |
551 int object_index = objects_to_materialize->length(); | 551 int object_index = objects_to_materialize->length(); |
552 // Store the hydrogen value into the de-duplication array | 552 // Store the hydrogen value into the de-duplication array |
553 objects_to_materialize->Add(value, zone()); | 553 objects_to_materialize->Add(value, zone()); |
554 // Find out whether we are storing a duplicated value | 554 // Find out whether we are storing a duplicated value |
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605 | 605 |
606 | 606 |
607 LPhase::~LPhase() { | 607 LPhase::~LPhase() { |
608 if (ShouldProduceTraceOutput()) { | 608 if (ShouldProduceTraceOutput()) { |
609 isolate()->GetHTracer()->TraceLithium(name(), chunk_); | 609 isolate()->GetHTracer()->TraceLithium(name(), chunk_); |
610 } | 610 } |
611 } | 611 } |
612 | 612 |
613 | 613 |
614 } } // namespace v8::internal | 614 } } // namespace v8::internal |
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