8342681: TestLoadBypassesNullCheck.java fails improperly specified VM option

Backport-of: 8bcd492

Author: SendaoYan

test/hotspot/jtreg/gc/shenandoah/compiler/TestLoadBypassesNullCheck.java

@@ -28,10 +28,14 @@
  * @requires vm.flavor == "server"
  * @requires vm.gc.Shenandoah
  *
- * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+StressGCM
- *                   -XX:+StressLCM -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0 -XX:StressSeed=270847015 TestLoadBypassesNullCheck
- * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+StressGCM
- *                   -XX:+StressLCM -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0 TestLoadBypassesNullCheck
+ * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
+ *                   -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+StressGCM -XX:+StressLCM -XX:StressSeed=270847015
+ *                   TestLoadBypassesNullCheck
+ * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
+ *                   -XX:+UseShenandoahGC -XX:LoopMaxUnroll=0
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+StressGCM -XX:+StressLCM
+ *                   TestLoadBypassesNullCheck
  *
  */