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1 // Copyright 2015 the V8 project authors. All rights reserved. | 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 | 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/node-properties.h" | 5 #include "src/compiler/node-properties.h" |
6 #include "src/compiler/common-operator.h" | 6 #include "src/compiler/common-operator.h" |
7 #include "src/compiler/graph.h" | 7 #include "src/compiler/graph.h" |
8 #include "src/compiler/js-operator.h" | 8 #include "src/compiler/js-operator.h" |
9 #include "src/compiler/linkage.h" | 9 #include "src/compiler/linkage.h" |
10 #include "src/compiler/node-matchers.h" | 10 #include "src/compiler/node-matchers.h" |
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417 } | 417 } |
418 break; | 418 break; |
419 } | 419 } |
420 } | 420 } |
421 DCHECK_EQ(1, effect->op()->EffectInputCount()); | 421 DCHECK_EQ(1, effect->op()->EffectInputCount()); |
422 effect = NodeProperties::GetEffectInput(effect); | 422 effect = NodeProperties::GetEffectInput(effect); |
423 } | 423 } |
424 } | 424 } |
425 | 425 |
426 // static | 426 // static |
427 MaybeHandle<Context> NodeProperties::GetSpecializationContext( | |
428 Node* node, MaybeHandle<Context> context) { | |
429 switch (node->opcode()) { | |
430 case IrOpcode::kHeapConstant: | |
431 return Handle<Context>::cast(OpParameter<Handle<HeapObject>>(node)); | |
432 case IrOpcode::kParameter: { | |
433 Node* const start = NodeProperties::GetValueInput(node, 0); | |
434 DCHECK_EQ(IrOpcode::kStart, start->opcode()); | |
435 int const index = ParameterIndexOf(node->op()); | |
436 // The context is always the last parameter to a JavaScript function, and | |
437 // {Parameter} indices start at -1, so value outputs of {Start} look like | |
438 // this: closure, receiver, param0, ..., paramN, context. | |
439 if (index == start->op()->ValueOutputCount() - 2) { | |
440 return context; | |
441 } | |
442 break; | |
443 } | |
444 default: | |
445 break; | |
446 } | |
447 return MaybeHandle<Context>(); | |
448 } | |
449 | |
450 | |
451 // static | |
452 Node* NodeProperties::GetOuterContext(Node* node, size_t* depth) { | 427 Node* NodeProperties::GetOuterContext(Node* node, size_t* depth) { |
453 Node* context = NodeProperties::GetContextInput(node); | 428 Node* context = NodeProperties::GetContextInput(node); |
454 while (*depth > 0 && | 429 while (*depth > 0 && |
455 IrOpcode::IsContextChainExtendingOpcode(context->opcode())) { | 430 IrOpcode::IsContextChainExtendingOpcode(context->opcode())) { |
456 context = NodeProperties::GetContextInput(context); | 431 context = NodeProperties::GetContextInput(context); |
457 (*depth)--; | 432 (*depth)--; |
458 } | 433 } |
459 return context; | 434 return context; |
460 } | 435 } |
461 | 436 |
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478 // static | 453 // static |
479 bool NodeProperties::IsInputRange(Edge edge, int first, int num) { | 454 bool NodeProperties::IsInputRange(Edge edge, int first, int num) { |
480 if (num == 0) return false; | 455 if (num == 0) return false; |
481 int const index = edge.index(); | 456 int const index = edge.index(); |
482 return first <= index && index < first + num; | 457 return first <= index && index < first + num; |
483 } | 458 } |
484 | 459 |
485 } // namespace compiler | 460 } // namespace compiler |
486 } // namespace internal | 461 } // namespace internal |
487 } // namespace v8 | 462 } // namespace v8 |
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