diff options
Diffstat (limited to 'deps/v8/src/code-stub-assembler.h')
| -rw-r--r-- | deps/v8/src/code-stub-assembler.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/deps/v8/src/code-stub-assembler.h b/deps/v8/src/code-stub-assembler.h index 8bd39369b7..2be168af85 100644 --- a/deps/v8/src/code-stub-assembler.h +++ b/deps/v8/src/code-stub-assembler.h @@ -1512,10 +1512,19 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler { Node* to_index, ParameterMode mode = INTPTR_PARAMETERS); - void CopyPropertyArrayValues( - Node* from_array, Node* to_array, Node* length, - WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER, - ParameterMode mode = INTPTR_PARAMETERS); + enum class DestroySource { kNo, kYes }; + + // Specify DestroySource::kYes if {from_array} is being supplanted by + // {to_array}. This offers a slight performance benefit by simply copying the + // array word by word. The source may be destroyed at the end of this macro. + // + // Otherwise, specify DestroySource::kNo for operations where an Object is + // being cloned, to ensure that MutableHeapNumbers are unique between the + // source and cloned object. + void CopyPropertyArrayValues(Node* from_array, Node* to_array, Node* length, + WriteBarrierMode barrier_mode, + ParameterMode mode, + DestroySource destroy_source); // Copies all elements from |from_array| of |length| size to // |to_array| of the same size respecting the elements kind. @@ -3073,6 +3082,10 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler { void InitializeFunctionContext(Node* native_context, Node* context, int slots); + // Allocate a clone of a mutable primitive, if {object} is a + // MutableHeapNumber. + TNode<Object> CloneIfMutablePrimitive(TNode<Object> object); + private: friend class CodeStubArguments; |