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1 // Copyright 2013 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/hydrogen-dce.h" | 5 #include "src/hydrogen-dce.h" |
6 #include "src/v8.h" | 6 #include "src/v8.h" |
7 | 7 |
8 namespace v8 { | 8 namespace v8 { |
9 namespace internal { | 9 namespace internal { |
10 | 10 |
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32 | 32 |
33 | 33 |
34 void HDeadCodeEliminationPhase::PrintLive(HValue* ref, HValue* instr) { | 34 void HDeadCodeEliminationPhase::PrintLive(HValue* ref, HValue* instr) { |
35 OFStream os(stdout); | 35 OFStream os(stdout); |
36 os << "[MarkLive "; | 36 os << "[MarkLive "; |
37 if (ref != NULL) { | 37 if (ref != NULL) { |
38 os << *ref; | 38 os << *ref; |
39 } else { | 39 } else { |
40 os << "root "; | 40 os << "root "; |
41 } | 41 } |
42 os << " -> " << *instr << "]" << endl; | 42 os << " -> " << *instr << "]" << std::endl; |
43 } | 43 } |
44 | 44 |
45 | 45 |
46 void HDeadCodeEliminationPhase::MarkLiveInstructions() { | 46 void HDeadCodeEliminationPhase::MarkLiveInstructions() { |
47 ZoneList<HValue*> worklist(10, zone()); | 47 ZoneList<HValue*> worklist(10, zone()); |
48 | 48 |
49 // Transitively mark all live instructions, starting from roots. | 49 // Transitively mark all live instructions, starting from roots. |
50 for (int i = 0; i < graph()->blocks()->length(); ++i) { | 50 for (int i = 0; i < graph()->blocks()->length(); ++i) { |
51 HBasicBlock* block = graph()->blocks()->at(i); | 51 HBasicBlock* block = graph()->blocks()->at(i); |
52 for (HInstructionIterator it(block); !it.Done(); it.Advance()) { | 52 for (HInstructionIterator it(block); !it.Done(); it.Advance()) { |
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95 HPhi* phi = worklist.RemoveLast(); | 95 HPhi* phi = worklist.RemoveLast(); |
96 HBasicBlock* block = phi->block(); | 96 HBasicBlock* block = phi->block(); |
97 phi->DeleteAndReplaceWith(NULL); | 97 phi->DeleteAndReplaceWith(NULL); |
98 if (phi->HasMergedIndex()) { | 98 if (phi->HasMergedIndex()) { |
99 block->RecordDeletedPhi(phi->merged_index()); | 99 block->RecordDeletedPhi(phi->merged_index()); |
100 } | 100 } |
101 } | 101 } |
102 } | 102 } |
103 | 103 |
104 } } // namespace v8::internal | 104 } } // namespace v8::internal |
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