https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68131
Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-10-28 Component|rtl-optimization |tree-optimization Ever confirmed|0 |1 --- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- (in type int) _10 = _6 + _9; if (_6 > _10) Indeed we fail to simplify that for some reason. If we did simplify, it might print one of those "assuming signed overflow does not occur when assuming that (X + c) < X is always false" warnings.