https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77881
Michael Matz <matz at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[5/6/7 Regression] |[5/6 Regression] |Non-optimal signed |Non-optimal signed |comparison on x86_64 since |comparison on x86_64 since |r146817 |r146817 --- Comment #7 from Michael Matz <matz at gcc dot gnu.org> --- Fixed for gcc 7. Not planning backports myself , it's a minor code quality regression only. But keeping it open in case anyone else wants to.