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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110294] [10/11 Regression] Segmentation fault with
 '-O3  -fno-dce -fno-toplevel-reorder -fno-tree-dce -fno-tree-pta
 -fno-tree-sink -ftoplevel-reorder'
Date: Fri, 30 Jun 2023 09:31:23 +0000
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X-Bugzilla-Component: middle-end
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X-Bugzilla-Keywords: needs-bisection, needs-reduction, wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110294

--- Comment #4 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to CTC from comment #3)
> Another related and smaller reproducer:
>=20
> # cat tmp.i
> a;
> *const b;
> main() { a !=3D *b; }

This is an undefined behavior and the compiler is allowed to generate code =
to
crash.  When you use tools like cvise for reducing a "crashing" test case y=
ou
need to add more constraints so it won't result such an invalid test case.=