emit-rtl.c (need_atomic_barrier_p): Mask memory model argument with MEMMODEL_MASK before comparing with MEMMODEL_*...

	* emit-rtl.c (need_atomic_barrier_p): Mask memory model argument
	with MEMMODEL_MASK before comparing with MEMMODEL_* memory types.
	* optabs.c (maybe_emit_sync_lock_test_and_set): Ditto.
	(expand_mem_thread_fence): Ditto.
	(expand_mem_signal_fence): Ditto.
	(expand_atomic_load): Ditto.
	(expand_atomic_store): Ditto.

From-SVN: r195228