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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111151] [12/13/14 Regression] Wrong code at -O0 on x86_64-pc-linux-gnu
Date: Fri, 22 Mar 2024 17:57:10 +0000	[thread overview]
Message-ID: <bug-111151-4-BOYpxMv72I@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-111151-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111151

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It isn't just those 2 values though.
MAX (INT_MIN / 2, 0) * -2 etc. would be a problem too.
So maybe play safe and only do it for MULT_EXPR when TYPE_OVERFLOW_UNDEFINED
and c is non-negative?  Maybe non-power of two -c could be ok too.

  parent reply	other threads:[~2024-03-22 17:57 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-25  6:39 [Bug middle-end/111151] New: " jwzeng at nuaa dot edu.cn
2023-08-25  7:16 ` [Bug middle-end/111151] " rguenth at gcc dot gnu.org
2023-08-25  7:16 ` rguenth at gcc dot gnu.org
2023-08-25 11:51 ` mikpelinux at gmail dot com
2023-08-25 12:27 ` rguenth at gcc dot gnu.org
2023-08-25 12:28 ` rguenth at gcc dot gnu.org
2023-08-25 12:35 ` rguenth at gcc dot gnu.org
2023-08-26  3:27 ` pinskia at gcc dot gnu.org
2024-03-22 13:40 ` law at gcc dot gnu.org
2024-03-22 17:29 ` jakub at gcc dot gnu.org
2024-03-22 17:37 ` jakub at gcc dot gnu.org
2024-03-22 17:41 ` jakub at gcc dot gnu.org
2024-03-22 17:57 ` jakub at gcc dot gnu.org [this message]
2024-03-22 18:48 ` jakub at gcc dot gnu.org
2024-03-22 19:15 ` jakub at gcc dot gnu.org
2024-03-25  7:23 ` rguenth at gcc dot gnu.org
2024-03-25 11:01 ` jakub at gcc dot gnu.org
2024-03-25 12:45 ` rguenth at gcc dot gnu.org
2024-03-26 10:22 ` cvs-commit at gcc dot gnu.org
2024-03-26 10:32 ` [Bug middle-end/111151] [12/13 " jakub at gcc dot gnu.org
2024-03-26 15:43 ` cvs-commit at gcc dot gnu.org
2024-03-30  3:55 ` cvs-commit at gcc dot gnu.org

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