src/hotspot/share/opto/subnode.cpp

*** 901,910 ****
--- 901,918 ----
            return TypeInt::CC_GT;
          }
        }
      }
    }
+   const TypeKlassPtr* k0 = r0->isa_klassptr();
+   const TypeKlassPtr* k1 = r1->isa_klassptr();
+   if (k0 && k1) {
+     if ((k0->flatten_array() && (!k1->can_be_value_type() || (k1->klass()->is_valuetype() && !k1->klass()->flatten_array()))) ||
+         (k1->flatten_array() && (!k0->can_be_value_type() || (k0->klass()->is_valuetype() && !k0->klass()->flatten_array())))) {
+       return TypeInt::CC_GT;
+     }
+   }
    
    // Known constants can be compared exactly
    // Null can be distinguished from any NotNull pointers
    // Unknown inputs makes an unknown result
    if( r0->singleton() ) {