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[Bug tree-optimization/69908] recognizing idioms that check for a buffer of all-zeros could make *much* better code
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 09 Jul 2017 19:58:19 +0000
- Subject: [Bug tree-optimization/69908] recognizing idioms that check for a buffer of all-zeros could make *much* better code
- Auto-submitted: auto-generated
- References: <bug-69908-4@http.gcc.gnu.org/bugzilla/>
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.