--- a/src/hotspot/cpu/s390/sharedRuntime_s390.cpp	Thu Sep 20 18:29:05 2018 +0100
+++ b/src/hotspot/cpu/s390/sharedRuntime_s390.cpp	Mon Oct 01 12:07:15 2018 +0200
@@ -587,6 +587,9 @@
     case T_DOUBLE:
       __ freg2mem_opt(Z_FRET, memaddr);
       break;
+    default:
+      ShouldNotReachHere();
+      break;
   }
 }
 
@@ -616,6 +619,9 @@
     case T_DOUBLE:
       __ mem2freg_opt(Z_FRET, memaddr);
       break;
+    default:
+      ShouldNotReachHere();
+      break;
   }
 }