As per UPC spec 1.3 query function is upc_atomic_isfast().

runtime/
 * include/upc_atomic.h (upc_atomic_query): Rename to upc_atomic_isfast().
 * smp/upc_atomic.tpl (upc_atomic_query): Rename to upc_atomic_isfast().
 * smp/upc_atomic.upc: Regenerate.