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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106101] [12 Regression] ICE in reg_bitfield_target_p
 since r12-4428-g147ed0184f403b
Date: Tue, 10 Oct 2023 17:36:46 +0000
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X-Bugzilla-Version: 12.1.1
X-Bugzilla-Keywords: ice-on-valid-code
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X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: FIXED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106101

--- Comment #29 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #28)
> (In reply to Richard Biener from comment #1)
> > Created attachment 53207 [details]
> > reduced testcase
>=20
> Do you happen to have the unreduced test case still?
>=20
>     int *yyvsp =3D 0;
>=20
> followed by:
>=20
>   if (strncmp( yyvsp[0], "~", 1) =3D=3D 0) {
>=20
> and
>=20
>    free(yyvsp[0]);
>=20
> looks rather bogus.

You can make `yyvsp` and argument if you are worried about the null pointer=
 and
you still get the crash back in 12.1.0.
That is:
```
int yyparse (int *yyvsp)
{
    int yystate =3D 0;
```

See https://godbolt.org/z/9YMsar1Ej .=