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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 // 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/ast/ast.h" | 5 #include "src/ast/ast.h" |
| 6 | 6 |
| 7 #include <cmath> // For isfinite. | 7 #include <cmath> // For isfinite. |
| 8 | 8 |
| 9 #include "src/ast/compile-time-value.h" | 9 #include "src/ast/compile-time-value.h" |
| 10 #include "src/ast/prettyprinter.h" | 10 #include "src/ast/prettyprinter.h" |
| 11 #include "src/ast/scopes.h" | 11 #include "src/ast/scopes.h" |
| 12 #include "src/base/hashmap.h" | 12 #include "src/base/hashmap.h" |
| 13 #include "src/builtins/builtins-constructor.h" |
| 13 #include "src/builtins/builtins.h" | 14 #include "src/builtins/builtins.h" |
| 14 #include "src/code-stubs.h" | 15 #include "src/code-stubs.h" |
| 15 #include "src/contexts.h" | 16 #include "src/contexts.h" |
| 16 #include "src/conversions.h" | 17 #include "src/conversions.h" |
| 17 #include "src/elements.h" | 18 #include "src/elements.h" |
| 18 #include "src/property-details.h" | 19 #include "src/property-details.h" |
| 19 #include "src/property.h" | 20 #include "src/property.h" |
| 20 #include "src/string-stream.h" | 21 #include "src/string-stream.h" |
| 21 #include "src/type-info.h" | 22 #include "src/type-info.h" |
| 22 | 23 |
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| 570 bit_field_ = FastElementsField::update( | 571 bit_field_ = FastElementsField::update( |
| 571 bit_field_, | 572 bit_field_, |
| 572 (max_element_index <= 32) || ((2 * elements) >= max_element_index)); | 573 (max_element_index <= 32) || ((2 * elements) >= max_element_index)); |
| 573 bit_field_ = HasElementsField::update(bit_field_, elements > 0); | 574 bit_field_ = HasElementsField::update(bit_field_, elements > 0); |
| 574 | 575 |
| 575 set_is_simple(is_simple); | 576 set_is_simple(is_simple); |
| 576 set_depth(depth_acc); | 577 set_depth(depth_acc); |
| 577 } | 578 } |
| 578 | 579 |
| 579 bool ObjectLiteral::IsFastCloningSupported() const { | 580 bool ObjectLiteral::IsFastCloningSupported() const { |
| 580 // FastCloneShallowObjectStub doesn't copy elements, and object literals don't | 581 // The FastCloneShallowObject builtin doesn't copy elements, and object |
| 581 // support copy-on-write (COW) elements for now. | 582 // literals don't support copy-on-write (COW) elements for now. |
| 582 // TODO(mvstanton): make object literals support COW elements. | 583 // TODO(mvstanton): make object literals support COW elements. |
| 583 return fast_elements() && has_shallow_properties() && | 584 return fast_elements() && has_shallow_properties() && |
| 584 properties_count() <= | 585 properties_count() <= ConstructorBuiltinsAssembler:: |
| 585 FastCloneShallowObjectStub::kMaximumClonedProperties; | 586 kMaximumClonedShallowObjectProperties; |
| 586 } | 587 } |
| 587 | 588 |
| 588 void ArrayLiteral::BuildConstantElements(Isolate* isolate) { | 589 void ArrayLiteral::BuildConstantElements(Isolate* isolate) { |
| 589 DCHECK_LT(first_spread_index_, 0); | 590 DCHECK_LT(first_spread_index_, 0); |
| 590 | 591 |
| 591 if (!constant_elements_.is_null()) return; | 592 if (!constant_elements_.is_null()) return; |
| 592 | 593 |
| 593 int constants_length = values()->length(); | 594 int constants_length = values()->length(); |
| 594 ElementsKind kind = FIRST_FAST_ELEMENTS_KIND; | 595 ElementsKind kind = FIRST_FAST_ELEMENTS_KIND; |
| 595 Handle<FixedArray> fixed_array = | 596 Handle<FixedArray> fixed_array = |
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| 652 isolate->factory()->NewConstantElementsPair(kind, elements); | 653 isolate->factory()->NewConstantElementsPair(kind, elements); |
| 653 | 654 |
| 654 constant_elements_ = literals; | 655 constant_elements_ = literals; |
| 655 set_is_simple(is_simple); | 656 set_is_simple(is_simple); |
| 656 set_depth(depth_acc); | 657 set_depth(depth_acc); |
| 657 } | 658 } |
| 658 | 659 |
| 659 bool ArrayLiteral::IsFastCloningSupported() const { | 660 bool ArrayLiteral::IsFastCloningSupported() const { |
| 660 return depth() <= 1 && | 661 return depth() <= 1 && |
| 661 values()->length() <= | 662 values()->length() <= |
| 662 FastCloneShallowArrayStub::kMaximumClonedElements; | 663 ConstructorBuiltinsAssembler::kMaximumClonedShallowArrayElements; |
| 663 } | 664 } |
| 664 | 665 |
| 665 void ArrayLiteral::AssignFeedbackVectorSlots(Isolate* isolate, | 666 void ArrayLiteral::AssignFeedbackVectorSlots(Isolate* isolate, |
| 666 FeedbackVectorSpec* spec, | 667 FeedbackVectorSpec* spec, |
| 667 FeedbackVectorSlotCache* cache) { | 668 FeedbackVectorSlotCache* cache) { |
| 668 // This logic that computes the number of slots needed for vector store | 669 // This logic that computes the number of slots needed for vector store |
| 669 // ics must mirror FullCodeGenerator::VisitArrayLiteral. | 670 // ics must mirror FullCodeGenerator::VisitArrayLiteral. |
| 670 for (int array_index = 0; array_index < values()->length(); array_index++) { | 671 for (int array_index = 0; array_index < values()->length(); array_index++) { |
| 671 Expression* subexpr = values()->at(array_index); | 672 Expression* subexpr = values()->at(array_index); |
| 672 DCHECK(!subexpr->IsSpread()); | 673 DCHECK(!subexpr->IsSpread()); |
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| 960 // static | 961 // static |
| 961 bool Literal::Match(void* literal1, void* literal2) { | 962 bool Literal::Match(void* literal1, void* literal2) { |
| 962 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); | 963 const AstValue* x = static_cast<Literal*>(literal1)->raw_value(); |
| 963 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); | 964 const AstValue* y = static_cast<Literal*>(literal2)->raw_value(); |
| 964 return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) || | 965 return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) || |
| 965 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); | 966 (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber()); |
| 966 } | 967 } |
| 967 | 968 |
| 968 } // namespace internal | 969 } // namespace internal |
| 969 } // namespace v8 | 970 } // namespace v8 |
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