https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110251
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |aldyh at gcc dot gnu.org, | |amacleod at redhat dot com --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Seems that change results in complete unrolling of the for (; e; a++) e &= e - 1; loop, dunno if it wouldn't be better to pattern match it as some .CTZ instead, unrolling it 16 times seems excessive. Anyway, it is then ranger that hangs.