https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59874
Uroš Bizjak <ubizjak at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2016-12-13 Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com Ever confirmed|0 |1 --- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> --- Created attachment 40323 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40323&action=edit Patch that adds __builtin_{clzs,ctzs} Does the attached patch (vs gcc-7) works for you?