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From: "franckbehaghel_gcc at protonmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107541] [13 Regression] wrong code at -O1,
 -O2 and -O3 on x86_64-linux-gnu
Date: Sun, 06 Nov 2022 18:28:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107541

Franck Behaghel <franckbehaghel_gcc at protonmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |franckbehaghel_gcc@protonma
                   |                            |il.com

--- Comment #1 from Franck Behaghel <franckbehaghel_gcc at protonmail dot c=
om> ---
Created attachment 53839
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53839&action=3Dedit
reduce testcase

Confirmed on master ( 3ad2167bbac8ae83b1e91305b105ab5287bdac55 )

It might be related with integer promotion on char type with ~ and / .
A reduce testcase.

gcc    main.cpp -O2   ; ./a.out ;echo "*****" ;  gcc  main.cpp ; ./a.out
b    : 128
*****
b    : 129=