also test AcqRel fence

RalfJung · RalfJung · commit 62f08eb41682 · 2019-10-09T10:29:08.000+02:00
diff --git a/tests/run-pass/atomic.rs b/tests/run-pass/atomic.rs
@@ -69,4 +69,5 @@ fn atomic_fences() {
     fence(SeqCst);
     fence(Release);
     fence(Acquire);
+    fence(AcqRel);
 }
