Factor out handling of mixed objects preprocessing after migration

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 1531 matching lines @@
     // Only the former two contain raw values and no heap pointers (besides the
     // map-word).
     return ((type & kIsIndirectStringMask) != kIsIndirectStringTag);
   }
   // The ConstantPoolArray contains heap pointers, but also raw values.
   if (type == CONSTANT_POOL_ARRAY_TYPE) return true;
   return (type <= LAST_DATA_TYPE);
 }
 
 
+bool HeapObject::MayContainMixedValues() {
+  InstanceType type = map()->instance_type();
+  switch (type) {
+    case CONSTANT_POOL_ARRAY_TYPE:
+    case JS_FUNCTION_TYPE:
+      return true;
+    default:
+      if (type >= FIRST_FIXED_TYPED_ARRAY_TYPE &&
+          type <= LAST_FIXED_TYPED_ARRAY_TYPE) {
+        return true;
+      }
+      return false;
+  }
+}
+
+
 void HeapObject::IteratePointers(ObjectVisitor* v, int start, int end) {
   v->VisitPointers(reinterpret_cast<Object**>(FIELD_ADDR(this, start)),
                    reinterpret_cast<Object**>(FIELD_ADDR(this, end)));
 }
 
 
 void HeapObject::IteratePointer(ObjectVisitor* v, int offset) {
   v->VisitPointer(reinterpret_cast<Object**>(FIELD_ADDR(this, offset)));
 }
 
@@ skipping 6055 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_