https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93321
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Created attachment 47679 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47679&action=edit fully untested patch This patch improves prepare_block_for_update but there might be others.