[Bug tree-optimization/95906] Failure to recognize max pattern with mask

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95906

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I'd say generate a (vec_)cond_expr, not directly a max. That is, replace the
comparison with any truth_valued_p (hmm, that function probably stopped working
for vectors when all comparisons were wrapped in vec_cond for avx512).