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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 12:32:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322

--- Comment #42 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this goes wrong in vectorizable_operation which does

  if (using_emulated_vectors_p
      && !vect_can_vectorize_without_simd_p (code))

to guard this but I'm not sure how this slips through?=