[Bug tree-optimization/58689] Enhance returns_nonnull

[postmas...@openbossa-org.bounceio.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58689

--- Comment #11 from postmas...@openbossa-org.bounceio.net ---
Created attachment 42258
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42258&action=edit
attachment-80437-1.eml