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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/112324] phiopt fail to recog if (b < 0) max = MAX(-b, max); else max = MAX (b, max) into max = MAX (ABS(b), max)
Date: Mon, 06 Nov 2023 17:27:33 +0000	[thread overview]
Message-ID: <bug-112324-4-VcLePpSW68@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-112324-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112324

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note a simple patch to improve phiopt here does not improve the original code
in openjpeg.

The reason why is due to the code in phiopt here is only operates on the case
where the phi would be the only one. In that case we also have a vop phi which
changes which causes the code not to be done.

  parent reply	other threads:[~2023-11-06 17:27 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-01  1:26 [Bug middle-end/112324] New: " crazylht at gmail dot com
2023-11-01  1:32 ` [Bug tree-optimization/112324] " pinskia at gcc dot gnu.org
2023-11-01  1:33 ` pinskia at gcc dot gnu.org
2023-11-06 17:27 ` pinskia at gcc dot gnu.org [this message]
2023-11-06 17:56 ` pinskia at gcc dot gnu.org
2023-11-06 20:23 ` pinskia at gcc dot gnu.org
2023-11-19 16:23 ` sjames at gcc dot gnu.org
2023-11-19 16:43 ` pinskia at gcc dot gnu.org
2023-11-19 17:13 ` pinskia at gcc dot gnu.org

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