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| 1 // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/ast/compile-time-value.h" |
| 6 |
| 7 #include "src/ast/ast.h" |
| 8 #include "src/factory.h" |
| 9 #include "src/handles-inl.h" |
| 10 #include "src/isolate.h" |
| 11 #include "src/objects-inl.h" |
| 12 |
| 13 namespace v8 { |
| 14 namespace internal { |
| 15 |
| 16 bool CompileTimeValue::IsCompileTimeValue(Expression* expression) { |
| 17 if (expression->IsLiteral()) return true; |
| 18 MaterializedLiteral* lit = expression->AsMaterializedLiteral(); |
| 19 return lit != NULL && lit->is_simple(); |
| 20 } |
| 21 |
| 22 Handle<FixedArray> CompileTimeValue::GetValue(Isolate* isolate, |
| 23 Expression* expression) { |
| 24 Factory* factory = isolate->factory(); |
| 25 DCHECK(IsCompileTimeValue(expression)); |
| 26 Handle<FixedArray> result = factory->NewFixedArray(2, TENURED); |
| 27 ObjectLiteral* object_literal = expression->AsObjectLiteral(); |
| 28 if (object_literal != NULL) { |
| 29 DCHECK(object_literal->is_simple()); |
| 30 if (object_literal->fast_elements()) { |
| 31 result->set(kLiteralTypeSlot, Smi::FromInt(OBJECT_LITERAL_FAST_ELEMENTS)); |
| 32 } else { |
| 33 result->set(kLiteralTypeSlot, Smi::FromInt(OBJECT_LITERAL_SLOW_ELEMENTS)); |
| 34 } |
| 35 result->set(kElementsSlot, *object_literal->constant_properties()); |
| 36 } else { |
| 37 ArrayLiteral* array_literal = expression->AsArrayLiteral(); |
| 38 DCHECK(array_literal != NULL && array_literal->is_simple()); |
| 39 result->set(kLiteralTypeSlot, Smi::FromInt(ARRAY_LITERAL)); |
| 40 result->set(kElementsSlot, *array_literal->constant_elements()); |
| 41 } |
| 42 return result; |
| 43 } |
| 44 |
| 45 CompileTimeValue::LiteralType CompileTimeValue::GetLiteralType( |
| 46 Handle<FixedArray> value) { |
| 47 Smi* literal_type = Smi::cast(value->get(kLiteralTypeSlot)); |
| 48 return static_cast<LiteralType>(literal_type->value()); |
| 49 } |
| 50 |
| 51 Handle<FixedArray> CompileTimeValue::GetElements(Handle<FixedArray> value) { |
| 52 return Handle<FixedArray>(FixedArray::cast(value->get(kElementsSlot))); |
| 53 } |
| 54 |
| 55 } // namespace internal |
| 56 } // namespace v8 |
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