--- old/src/hotspot/share/classfile/javaClasses.inline.hpp	2017-11-30 14:09:08.608258549 +0100
+++ new/src/hotspot/share/classfile/javaClasses.inline.hpp	2017-11-30 14:09:08.320258559 +0100
@@ -57,8 +57,7 @@
 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
   assert(initialized && (value_offset > 0), "Must be initialized");
   assert(is_instance(java_string), "must be java_string");
-  oop value = HeapAccess<AS_NO_KEEPALIVE>::oop_load_at(java_string, value_offset);
-  return (typeArrayOop)value;
+  return (typeArrayOop) java_string->obj_field_special<AS_NO_KEEPALIVE>(value_offset);
 }
 unsigned int java_lang_String::hash(oop java_string) {
   assert(initialized && (hash_offset > 0), "Must be initialized");
@@ -73,9 +72,9 @@
   return coder == CODER_LATIN1;
 }
 int java_lang_String::length(oop java_string) {
-  typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
   assert(initialized, "Must be initialized");
   assert(is_instance(java_string), "must be java_string");
+  typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
   if (value == NULL) {
     return 0;
   }