https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97043
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:e75e5d2c41d294c4da4adfe610204ce5d97c3a4e commit r9-9959-ge75e5d2c41d294c4da4adfe610204ce5d97c3a4e Author: Richard Biener <rguent...@suse.de> Date: Mon Sep 14 11:25:04 2020 +0200 tree-optimization/97043 - fix latent wrong-code with SLP vectorization When the unrolling decision comes late and would have prevented eliding a SLP load permutation we can end up generating aligned loads when the load is in fact unaligned. Most of the time alignment analysis figures out the load is in fact unaligned but that cannot be relied upon. The following removes the SLP load permutation eliding based on the still premature vectorization factor. 2020-09-14 Richard Biener <rguent...@suse.de> PR tree-optimization/97043 * tree-vect-slp.c (vect_analyze_slp_instance): Do not elide a load permutation if the current vectorization factor is one. (cherry picked from commit e93428a8b056aed83a7678d4dc8272131ab671ba)
