Interestingly, not only do both versions emit the same assembly, but clang both autovectorizes and unrolls the loop: https://godbolt.org/z/qxsKWfz9s https://go

Interestingly, not only do both versions emit the same assembly, but clang both autovectorizes and unrolls the loop: https://godbolt.org/z/qxsKWfz9s https://godbolt.org/z/qxsKWfz9s