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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/104610] memcmp () == 0 can be optimized better for avx512f
Date: Tue, 22 Feb 2022 05:55:24 +0000 [thread overview]
Message-ID: <bug-104610-4-5H76xQOWpy@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-104610-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104610
--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #3)
> (In reply to Hongtao.liu from comment #2)
> > in Gimple, there're
> >
> > _1 = __builtin_memcmp_eq (a_5(D), &t[0], 32);
> > _2 = _1 == 0;
> > _6 = (int) _2;
> >
> >
> > So it's related to codegen optimization with vectorized codes for
> > __builtin_memcmp_eq, guess we can start with size multiple of 16 bytes?
> >
> There's no optab or target_hook for backend to participate in optimization
> of Participation in optimization.
typo last optimization should be compare_by_pieces.
next prev parent reply other threads:[~2022-02-22 5:55 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 11:00 [Bug target/104610] New: " pinskia at gcc dot gnu.org
2022-02-21 11:01 ` [Bug target/104610] " pinskia at gcc dot gnu.org
2022-02-22 4:03 ` crazylht at gmail dot com
2022-02-22 5:54 ` crazylht at gmail dot com
2022-02-22 5:55 ` crazylht at gmail dot com [this message]
2022-02-22 6:18 ` crazylht at gmail dot com
2022-02-22 6:32 ` crazylht at gmail dot com
2022-02-23 2:15 ` crazylht at gmail dot com
2022-02-23 6:18 ` crazylht at gmail dot com
2022-02-23 21:04 ` hjl.tools at gmail dot com
2022-02-24 5:33 ` crazylht at gmail dot com
2022-02-24 6:00 ` hjl.tools at gmail dot com
2022-02-26 20:26 ` hjl.tools at gmail dot com
2022-02-27 19:02 ` hjl.tools at gmail dot com
2022-02-27 19:29 ` hjl.tools at gmail dot com
2022-03-04 3:03 ` hjl.tools at gmail dot com
2022-03-28 5:05 ` crazylht at gmail dot com
2022-03-28 5:27 ` crazylht at gmail dot com
2022-05-18 2:47 ` cvs-commit at gcc dot gnu.org
2022-05-18 2:49 ` crazylht at gmail dot com
2022-06-16 7:41 ` crazylht at gmail dot com
2023-06-28 10:12 ` cvs-commit at gcc dot gnu.org
2023-06-28 11:05 ` ubizjak at gmail dot com
2023-10-10 7:37 ` crazylht at gmail dot com
2023-10-30 3:10 ` cvs-commit at gcc dot gnu.org
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