diff -r 97d13893ec3c -r 54cf02d52c1b src/hotspot/share/opto/cfgnode.hpp
--- a/src/hotspot/share/opto/cfgnode.hpp	Tue Nov 26 10:47:46 2019 +0100
+++ b/src/hotspot/share/opto/cfgnode.hpp	Fri Nov 15 16:39:08 2019 +0100
@@ -308,6 +308,8 @@
   Node* Ideal_common(PhaseGVN *phase, bool can_reshape);
   Node* search_identical(int dist);
 
+  Node* simple_subsuming(PhaseIterGVN* igvn);
+
 public:
 
   // Degrees of branch prediction probability by order of magnitude: