Use FixedTypedArrayBase's body descriptor for static visiting

src/heap/scavenger.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/scavenger.h"
 
 #include "src/contexts.h"
 #include "src/heap/heap.h"
 #include "src/heap/objects-visiting-inl.h"
 #include "src/heap/scavenger-inl.h"
@@ skipping 249 matching lines @@
                                               HeapObject* object) {
     int length = reinterpret_cast<FixedDoubleArray*>(object)->length();
     int object_size = FixedDoubleArray::SizeFor(length);
     EvacuateObject<DATA_OBJECT, kDoubleAligned>(map, slot, object, object_size);
   }
 
 
   static inline void EvacuateFixedTypedArray(Map* map, HeapObject** slot,
                                              HeapObject* object) {
     int object_size = reinterpret_cast<FixedTypedArrayBase*>(object)->size();
-    EvacuateObject<DATA_OBJECT, kWordAligned>(map, slot, object, object_size);
-
-    MapWord map_word = object->map_word();
-    DCHECK(map_word.IsForwardingAddress());
-    FixedTypedArrayBase* target =
-        reinterpret_cast<FixedTypedArrayBase*>(map_word.ToForwardingAddress());
-    if (target->base_pointer() != Smi::FromInt(0))
-      target->set_base_pointer(target, SKIP_WRITE_BARRIER);
+    EvacuateObject<POINTER_OBJECT, kWordAligned>(map, slot, object,
+                                                 object_size);
   }
 
 
   static inline void EvacuateFixedFloat64Array(Map* map, HeapObject** slot,
                                                HeapObject* object) {
     int object_size = reinterpret_cast<FixedFloat64Array*>(object)->size();
-    EvacuateObject<DATA_OBJECT, kDoubleAligned>(map, slot, object, object_size);
-
-    MapWord map_word = object->map_word();
-    DCHECK(map_word.IsForwardingAddress());
-    FixedTypedArrayBase* target =
-        reinterpret_cast<FixedTypedArrayBase*>(map_word.ToForwardingAddress());
-    if (target->base_pointer() != Smi::FromInt(0))
-      target->set_base_pointer(target, SKIP_WRITE_BARRIER);
+    EvacuateObject<POINTER_OBJECT, kDoubleAligned>(map, slot, object,
+                                                   object_size);
   }
 
 
   static inline void EvacuateJSArrayBuffer(Map* map, HeapObject** slot,
                                            HeapObject* object) {
     ObjectEvacuationStrategy<POINTER_OBJECT>::Visit(map, slot, object);
 
     Heap* heap = map->GetHeap();
     MapWord map_word = object->map_word();
     DCHECK(map_word.IsForwardingAddress());
@@ skipping 169 matching lines @@
 
 void ScavengeVisitor::ScavengePointer(Object** p) {
   Object* object = *p;
   if (!heap_->InNewSpace(object)) return;
   Scavenger::ScavengeObject(reinterpret_cast<HeapObject**>(p),
                             reinterpret_cast<HeapObject*>(object));
 }
 
 }  // namespace internal
 }  // namespace v8