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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/115143] [11/12/13/14/15 Regression] tree
 check: expected class 'type', have 'exceptional' (error_mark) in
 useless_type_conversion_p, at gimple-expr.cc:85
Date: Sat, 18 May 2024 14:10:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115143

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)=20
> Here is one which failed since GCC 10 (when __MIN support was added for
> gimple FE):
> ```
> signed __GIMPLE (ssa,startwith("phiopt"))
> foo (signed a, unsigned b)
> {
>   signed j;
>   signed _23;
>   signed _12;
>=20
>   __BB(2):
>   if (a_6(D) > 0)
>     goto __BB3;
>   else
>     goto __BB4;
>=20
>   __BB(3):
>   j_10 =3D __PHI (__BB2: b_11(D));
>   _23 =3D __MIN (a_6(D), j_10);
>   goto __BB4;
>=20
>   __BB(4):
>   _12 =3D __PHI (__BB3: _23, __BB2: 0);
>   return _12;
>=20
> }
> ```

This testcase is buggy.=