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From: "liuhongt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113609] EQ/NE comparison between avx512 kmask and -1 can be optimized with kxortest with checking CF.
Date: Fri, 26 Jan 2024 03:37:07 +0000	[thread overview]
Message-ID: <bug-113609-4-IW4YzdOthO@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-113609-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113609

--- Comment #1 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
Since they're different modes, CCZ for cmp, but CCS for kortest, it could be
diffcult to optimize it in RA stage by adding alternatives(like we did for
compared to 0). So the easy way could be adding peephole to hanlde that.

  reply	other threads:[~2024-01-26  3:37 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-26  3:17 [Bug target/113609] New: " liuhongt at gcc dot gnu.org
2024-01-26  3:37 ` liuhongt at gcc dot gnu.org [this message]
2024-01-26  7:58 ` [Bug target/113609] " ubizjak at gmail dot com
2024-06-03  5:44 ` cvs-commit at gcc dot gnu.org
2024-06-03  6:50 ` liuhongt at gcc dot gnu.org

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