https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86677
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> --- On Wed, 10 Oct 2018, ktkachov at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86677 > > ktkachov at gcc dot gnu.org changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > CC| |ktkachov at gcc dot gnu.org > > --- Comment #3 from ktkachov at gcc dot gnu.org --- > GCC does disable some pattern recognition with > -fno-tree-loop-distribute-patterns, which is implied by -ffreestanding (used > by > the kernel). Wouldn't it be consistent to disable this pattern recognition in > that setup as well? popcount is not such a fundamental helper function like > e.g. DImode shifts, after all I am not against adding a new switch for this (not sure if we really should overload -fno-tree-loop-distribute-patterns with this since this will disable popcount recognition at anything below -O3).
