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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/99746] ICE in vect_get_vec_defs_for_operand,
 at tree-vect-stmts.c:1450
Date: Wed, 24 Mar 2021 09:02:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99746

--- Comment #5 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to Tamar Christina from comment #4)
> > I can reproduce it. You likely named the file x.f90 (and not x.f). Plea=
se try that..
>=20
> Aha.. Fortran such a mystery :)

Yep, all black magic. Btw. one can convert the forms with:
https://github.com/ylikx/fortran-legacy-tools/blob/master/fixed2free/fixed2=
free2.py

>=20
> > Do you want me to bisect that?
>=20
> No, they'll all point to the commit which introduced the optabs, since
> that's the one causing the vectorizer to go down this path.  But it won't=
 be
> the actual commit with the changes to the vectorizer.

Good, have fun.=