*** old/src/share/vm/opto/memnode.cpp	Wed Jun 29 15:34:15 2016
--- new/src/share/vm/opto/memnode.cpp	Wed Jun 29 15:34:15 2016

*** 1711,1733 ****
--- 1711,1732 ----
  #endif
          return jt;
        }
      }
    } else if (tp->base() == Type::InstPtr) {
      ciEnv* env = C->env();
      const TypeInstPtr* tinst = tp->is_instptr();
      ciKlass* klass = tinst->klass();
      assert( off != Type::OffsetBot ||
              // arrays can be cast to Objects
              tp->is_oopptr()->klass()->is_java_lang_Object() ||
              // unsafe field access may not have a constant offset
              C->has_unsafe_access(),
              "Field accesses must be precise" );
      // For oop loads, we expect the _type to be precise.
      // Optimizations for constant objects
+ 
+     // Optimize loads from constant fields.
+     const TypeInstPtr* tinst = tp->is_instptr();
      ciObject* const_oop = tinst->const_oop();
!     if (!is_mismatched_access() && off != Type::OffsetBot && const_oop != NULL && const_oop->is_instance()) {
        const Type* con_type = Type::make_constant_from_field(const_oop->as_instance(), off, is_unsigned(), memory_type());
        if (con_type != NULL) {
          return con_type;
        }
      }