[Bug middle-end/85637] Unneeded store of member variables in inner loop

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85637

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Err, wrong function assembly pasted.  Note you also can make this * restrict
via

        __attribute__((noinline))
        void Update(const void* b, unsigned int len) __restrict
        {
                if (len) {

which has the same effect.