https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121509
--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:c5dab6fb402c93a92f6aa808c43956dfb9328190 commit r16-3162-gc5dab6fb402c93a92f6aa808c43956dfb9328190 Author: Richard Biener <rguent...@suse.de> Date: Tue Aug 12 09:51:54 2025 +0200 tree-optimization/121509 - failure to detect unvectorizable loop With the hybrid stmt detection no longer working as a gate-keeper to detect unhandled stmts we have to, and can, detect those earlier. The appropriate place is vect_mark_stmts_to_be_vectorized where for trivially relevant PHIs we can stop analyzing when the PHI wasn't classified as a known def during vect_analyze_scalar_cycles. PR tree-optimization/121509 * tree-vect-stmts.cc (vect_mark_stmts_to_be_vectorized): Fail early when we detect a relevant but not handled PHI. * gcc.dg/vect/pr121509.c: New testcase.
