https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125185
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- So the issue is that we have a reduction with a pattern: patt_33 = DOT_PROD_EXPR <md_15, md_15, sum_lsm.5_11>; and the reduc code is a PLUS_EXPR. But vect_slp_linearize_chain cannot work with the above as it solely handles binary associative stmts.
