[Bug tree-optimization/69908] recognizing idioms that check for a buffer of all-zeros could make *much* better code

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69908

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Yuri Gribov from comment #3)
> As noted in comments, this is more about adding new API to Glibc than GCC
> (they have corresponding
> https://sourceware.org/bugzilla/show_bug.cgi?id=19920 about this). So can
> this be closed?

I don't think so (at least not for that reason). Whatever glibc does, this is
still a missed optimization in gcc.