On Sat, Jun 21, 2014 at 10:46 PM, Segher Boessenkool <seg...@kernel.crashing.org> wrote: > Nothing will ever generate RTL matching this alternative. Maybe long > ago this was needed, but not anymore.
Can you provide some reference for that assertion? At some point GCC created shifts with zero shift count. It probably does not, but does a generic optimization prevent this? Thanks, David