https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110812
--- Comment #35 from Jeffrey A. Law <law at gcc dot gnu.org> --- Not only that, hiway is too painfully slow to build that it would blow up testing times beyond all usefullness. As Sam noted, we reduce regressions from hiway and include those. We also rely on the likes of mass builds in Fedora, Canonical, Gentoo, etc as a deeper test.
