https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947 Bug 53947 depends on bug 57206, which changed state.
Bug 57206 Summary: Auto-vectorization fails when array index is an unsigned int expression https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57206 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED