[Bug tree-optimization/106322] [12/13 Regression] tree-vectorize: Wrong code at O2 level (-fno-tree-vectorize is working) since r12-2404-ga1d27560770818c5

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322

--- 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?