https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99880
--- Comment #4 from CVS 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:e5c170e080399fb3d24a38bbfcd66bd4675abe53 commit r11-8005-ge5c170e080399fb3d24a38bbfcd66bd4675abe53 Author: Richard Biener <rguent...@suse.de> Date: Tue Apr 6 13:20:44 2021 +0200 tree-optimization/99880 - avoid vectorizing irrelevant PHI backedge defs This adds a relevancy check before trying to set the vector def of a backedge in an unvectorized PHI. 2021-04-06 Richard Biener <rguent...@suse.de> PR tree-optimization/99880 * tree-vect-loop.c (maybe_set_vectorized_backedge_value): Only set vectorized defs of relevant PHIs. * gcc.dg/torture/pr99880.c: New testcase.