https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88713
--- Comment #52 from Marc Glisse <glisse at gcc dot gnu.org> --- (In reply to Thomas Koenig from comment #49) > Argh. Sacrificing performance for the sake of bugware... But note that in this PR (specifically for avx512 vectors on this cpu), the OP says that the recip version is slower than calling directly the right insn (it wasn't clear if that was for inverse or for sqrt).