void ipa_dump_refering (FILE *, struct ipa_ref_list *);
void ipa_clone_references (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
void ipa_clone_refering (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
+bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);