[heap] Add optimized RecordWrites

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index aca86484bd01b8a1dc372ac0fac8a175dd2b266c..d7b5b627319c5379fc347f3501f16f6da5017747 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -1110,13 +1110,7 @@ void Heap::MoveElements(FixedArray* array, int dst_index, int src_index,
   DCHECK(array->map() != fixed_cow_array_map());
   Object** dst_objects = array->data_start() + dst_index;
   MemMove(dst_objects, array->data_start() + src_index, len * kPointerSize);
-  if (!InNewSpace(array)) {
-    for (int i = 0; i < len; i++) {
-      RecordWrite(array, array->OffsetOfElementAt(dst_index + i),
-                  dst_objects[i]);
-    }
-  }
-  incremental_marking()->IterateBlackObject(array);
+  FIXED_ARRAY_ELEMENTS_WRITE_BARRIER(this, array, dst_index, src_index);

[ulan, 2016/04/11 12:49:23]

src_index should be len.

 }