https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69143
Segher Boessenkool <segher at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |segher at gcc dot gnu.org --- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> --- The SFs are converted to SI and back, which perhaps would work out fine except that the SI->SF is an unspec (UNSPEC_SF_FROM_SI), and that won't optimise.