diff -r 59f7c242ccb8 -r 1182ff8929cc src/hotspot/share/opto/node.hpp
--- a/src/hotspot/share/opto/node.hpp	Tue Sep 24 10:16:00 2019 +0100
+++ b/src/hotspot/share/opto/node.hpp	Wed Aug 28 15:51:03 2019 +0200
@@ -394,6 +394,7 @@
 #ifdef ASSERT
   bool is_dead() const;
 #define is_not_dead(n) ((n) == NULL || !VerifyIterativeGVN || !((n)->is_dead()))
+  bool is_reachable_from_root() const;
 #endif
   // Check whether node has become unreachable
   bool is_unreachable(PhaseIterGVN &igvn) const;