https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99912
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> --- I've posted a series of two patches that will improve things for GCC 12. https://gcc.gnu.org/pipermail/gcc-patches/2021-April/567743.html https://gcc.gnu.org/pipermail/gcc-patches/2021-April/567731.html https://gcc.gnu.org/pipermail/gcc-patches/2021-April/567744.html the last will eventually see adjustments and/or a different implementation approach.