https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947 Bug 53947 depends on bug 44976, which changed state.
Bug 44976 Summary: reductions with short variables do not get vectorized https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44976 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED