7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()

Use shorter instruction sequences for atomic add and atomic exchange when possible.

Reviewed-by: kvn, jrose

hotspot/src/share/vm/opto/connode.cpp

@@ -480,7 +480,9 @@ static bool can_cause_alias(Node *n, PhaseTransform *phase) {
         opc == Op_CheckCastPP ||
         opc == Op_StorePConditional ||
         opc == Op_CompareAndSwapP ||
-        opc == Op_CompareAndSwapN;
+        opc == Op_CompareAndSwapN ||
+        opc == Op_GetAndSetP ||
+        opc == Op_GetAndSetN;
   }
   return possible_alias;
 }