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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111860] [14 Regression] incorrect vUSE after
 guard block loop skip block during vectorization.
Date: Thu, 19 Oct 2023 16:22:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111860

--- Comment #20 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
(In reply to David Binderman from comment #19)
> Created attachment 56154 [details]
> C source code
>=20
> You might like to have a go at getting the attached code working:
>=20
> $ ~/gcc/results/bin/gcc -c -w -O3  bug967B.c
> bug967B.c: In function =E2=80=98__wcstod128_l_internal=E2=80=99:
> bug967B.c:10:1: error: stmt with wrong VUSE
>    10 | __wcstod128_l_internal() {
>       | ^~~~~~~~~~~~~~~~~~~~~~
>=20
> I have 20+ other cases. I can provide them, if you like.

No need :) They're all the same bug.  The idea for the fix was correct, but=
 the
way I checked if the loop was versioned wasn't strong enough.

All the reported testcases now pass. I'll start regressions.=