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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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/compiler/ast-graph-builder.h" | 5 #include "src/compiler/ast-graph-builder.h" |
6 | 6 |
7 #include "src/ast/scopes.h" | 7 #include "src/ast/scopes.h" |
8 #include "src/compiler.h" | 8 #include "src/compiler.h" |
9 #include "src/compiler/ast-loop-assignment-analyzer.h" | 9 #include "src/compiler/ast-loop-assignment-analyzer.h" |
10 #include "src/compiler/control-builders.h" | 10 #include "src/compiler/control-builders.h" |
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639 } | 639 } |
640 | 640 |
641 | 641 |
642 void AstGraphBuilder::ClearNonLiveSlotsInFrameStates() { | 642 void AstGraphBuilder::ClearNonLiveSlotsInFrameStates() { |
643 if (!FLAG_analyze_environment_liveness || | 643 if (!FLAG_analyze_environment_liveness || |
644 !info()->is_deoptimization_enabled()) { | 644 !info()->is_deoptimization_enabled()) { |
645 return; | 645 return; |
646 } | 646 } |
647 | 647 |
648 NonLiveFrameStateSlotReplacer replacer( | 648 NonLiveFrameStateSlotReplacer replacer( |
649 &state_values_cache_, jsgraph()->UndefinedConstant(), | 649 &state_values_cache_, jsgraph()->OptimizedOutConstant(), |
650 liveness_analyzer()->local_count(), local_zone()); | 650 liveness_analyzer()->local_count(), local_zone()); |
651 Variable* arguments = info()->scope()->arguments(); | 651 Variable* arguments = info()->scope()->arguments(); |
652 if (arguments != nullptr && arguments->IsStackAllocated()) { | 652 if (arguments != nullptr && arguments->IsStackAllocated()) { |
653 replacer.MarkPermanentlyLive(arguments->index()); | 653 replacer.MarkPermanentlyLive(arguments->index()); |
654 } | 654 } |
655 liveness_analyzer()->Run(&replacer); | 655 liveness_analyzer()->Run(&replacer); |
656 if (FLAG_trace_environment_liveness) { | 656 if (FLAG_trace_environment_liveness) { |
657 OFStream os(stdout); | 657 OFStream os(stdout); |
658 liveness_analyzer()->Print(os); | 658 liveness_analyzer()->Print(os); |
659 } | 659 } |
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4372 // Phi does not exist yet, introduce one. | 4372 // Phi does not exist yet, introduce one. |
4373 value = NewPhi(inputs, value, control); | 4373 value = NewPhi(inputs, value, control); |
4374 value->ReplaceInput(inputs - 1, other); | 4374 value->ReplaceInput(inputs - 1, other); |
4375 } | 4375 } |
4376 return value; | 4376 return value; |
4377 } | 4377 } |
4378 | 4378 |
4379 } // namespace compiler | 4379 } // namespace compiler |
4380 } // namespace internal | 4380 } // namespace internal |
4381 } // namespace v8 | 4381 } // namespace v8 |
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