http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48816
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-04-29 12:08:57 UTC --- On Fri, 29 Apr 2011, rguenth at gcc dot gnu.org wrote: > It is "used" in i += 3. I suppose we should ignore value-updates in > use analysis. See PR 44677.