https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77813
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- Created attachment 39728 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39728&action=edit optimization patch that shows the issue
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77813
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- Created attachment 39728 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39728&action=edit optimization patch that shows the issue