--- old/src/hotspot/share/opto/loopnode.hpp	2020-07-15 11:49:42.232217561 +0200
+++ new/src/hotspot/share/opto/loopnode.hpp	2020-07-15 11:49:41.784027236 +0200
@@ -1352,6 +1352,7 @@
   void try_move_store_after_loop(Node* n);
   bool identical_backtoback_ifs(Node *n);
   bool can_split_if(Node *n_ctrl);
+  DEBUG_ONLY(void check_divide_by_zero(const Node* n, const Type* zero) const;)
 
   // Determine if a method is too big for a/another round of split-if, based on
   // a magic (approximate) ratio derived from the equally magic constant 35000,