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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/106032] [10/11/12/13 Regression] wrong code at
 -Os and above on x86_64-linux-gnu
Date: Mon, 20 Jun 2022 08:09:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106032

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Li=C5=A1ka from comment #5)
> (In reply to Andrew Pinski from comment #4)
> > Here is a testcase which shows this was latent but fails in GCC 7+ (so =
it is
> > still a regression):
> > int a, b, c, *d;
> > int main() {
> >   int e =3D 0, f =3D 0;
> >   int *dd =3D d;
> >   for (; f < 1; f++)
> >     if (c < 0)
> >       e =3D *dd;
> >   if (a) {
> >     a =3D b ? 0 : a;
> >     e && (b =3D a);
> >   }
> >   return 0;
> > }
>=20
> This one started with r9-6299-gd7a700e0a701e516.

I guess I need to make another testcase since that would have just changed =
the
gimple level.=