On Fri, Oct 21, 2016 at 5:23 PM, Jakub Jelinek <ja...@redhat.com> wrote: > Hi! > > This patch adds folding for the new ia32 md builtins. > If they can be folded into constant, it is done in ix86_fold_builtin, > if they can fold to corresponding generic __builtin_c[lt]z* (which have > e.g. the advantage that VRP knows about what values it can have etc.), > it is done in gimple_fold_builtin target hook.
Are you sure that there is no way zero will be passed to generic __builtin_c[lt]z? Uros.
