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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/106322] [12/13 Regression] tree-vectorize:
 Wrong code at O2 level (-fno-tree-vectorize is working) since
 r12-2404-ga1d27560770818c5
Date: Wed, 10 Aug 2022 12:36:11 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322

--- Comment #43 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #42)
> I think this goes wrong in vectorizable_operation which does
>=20
>   if (using_emulated_vectors_p
>       && !vect_can_vectorize_without_simd_p (code))
>=20
> to guard this but I'm not sure how this slips through?

Ah, it's an internal function.  I think we should simply return false
during analysis for any vect_emulated_vector_p type in vectorizable_call.

Alternatively pattern recognition could also be made to fail but the above
is definitely more future proof.=