--- a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp	Tue Sep 18 20:49:44 2018 +0200
+++ b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp	Wed Sep 26 18:11:00 2018 +0100
@@ -1709,6 +1709,7 @@
         default: ShouldNotReachHere();
         }
         break;
+      default:
         ShouldNotReachHere();
       }
     } else {

--- a/src/hotspot/cpu/aarch64/c1_LIRGenerator_aarch64.cpp	Tue Sep 18 20:49:44 2018 +0200
+++ b/src/hotspot/cpu/aarch64/c1_LIRGenerator_aarch64.cpp	Wed Sep 26 18:11:00 2018 +0100
@@ -584,8 +584,8 @@
     case doubleTag:  do_ArithmeticOp_FPU(x);  return;
     case longTag:    do_ArithmeticOp_Long(x); return;
     case intTag:     do_ArithmeticOp_Int(x);  return;
+    default:         ShouldNotReachHere();    return;
   }
-  ShouldNotReachHere();
 }
 
 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
@@ -792,9 +792,13 @@
           __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
           break;
         }
+        default:
+          ShouldNotReachHere();
       }
       break;
     }
+    default:
+      ShouldNotReachHere();
   }
 }
 

--- a/src/hotspot/cpu/aarch64/templateTable_aarch64.cpp	Tue Sep 18 20:49:44 2018 +0200
+++ b/src/hotspot/cpu/aarch64/templateTable_aarch64.cpp	Wed Sep 26 18:11:00 2018 +0100
@@ -2329,6 +2329,7 @@
   switch (code) {
   case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
   case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
+  default: break;
   }
 
   assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
@@ -2953,6 +2954,7 @@
     case Bytecodes::_fast_dputfield: __ pop_d(); break;
     case Bytecodes::_fast_fputfield: __ pop_f(); break;
     case Bytecodes::_fast_lputfield: __ pop_l(r0); break;
+    default: break;
     }
     __ bind(L2);
   }