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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/109031] csmith: possible bad code with -O2
 -fno-strict-aliasing
Date: Wed, 08 Mar 2023 11:10:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109031

--- Comment #7 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #4)
> Created attachment 54596 [details]
> C source code
>=20
> After 3 hours further reduction.

I am struggling with further reduction. My bash knowledge is short.

My cvise script is:

/usr/bin/gcc -w -Werror=3Dimplicit bug892.c \
&& (./a.out 1 > 1) \
&& /home/dcb36/gcc/results/bin/gcc -w -O2 -fno-strict-aliasing bug892.c=20
\
&& (./a.out 1 > 2) \
&& diff 1 2; \

but then if diff returns 1, the script should return 0 and
if diff returns 0, then the script should return 1.=