Add the Shenandoah block to compiler/gcbarriers/UnsafeIntrinsicsTest.java:

diff -r 17f81aac4167 test/hotspot/jtreg/compiler/gcbarriers/UnsafeIntrinsicsTest.java
--- a/test/hotspot/jtreg/compiler/gcbarriers/UnsafeIntrinsicsTest.java Tue Aug 18 12:46:33 2020 +0200
+++ b/test/hotspot/jtreg/compiler/gcbarriers/UnsafeIntrinsicsTest.java Tue Aug 18 14:09:41 2020 +0200
@@ -30,10 +30,21 @@
  * @requires vm.gc.Z
  * @library /test/lib
  * @run main/othervm -XX:+UseZGC -XX:+UnlockDiagnosticVMOptions -XX:+ZVerifyViews -XX:ZCollectionInterval=1 -XX:-CreateCoredumpOnCrash -XX:CompileCommand=dontinline,*::mergeImpl* compiler.gcbarriers.UnsafeIntrinsicsTest
  */
 
+/*
+ * @test
+ * @key randomness
+ * @bug 8059022
+ * @modules java.base/jdk.internal.misc:+open
+ * @summary Validate barriers after Unsafe getReference, CAS and swap (GetAndSet)
+ * @requires vm.gc.Shenandoah
+ * @library /test/lib
+ * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerifyOptoBarriers -XX:CompileCommand=dontinline,*::mergeImpl* compiler.gcbarriers.UnsafeIntrinsicsTest
+ */
+
 package compiler.gcbarriers;
 
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Random;

There used to be failures in code like this, fixed in JDK-8255401. This change turns the test into regression test for it.