https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107247
--- Comment #2 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:e5139d18dfb8130876ea59178e8471fb1b34bb80 commit r13-3276-ge5139d18dfb8130876ea59178e8471fb1b34bb80 Author: Richard Biener <rguent...@suse.de> Date: Thu Oct 13 14:56:01 2022 +0200 tree-optimization/107247 - reduce SLP reduction accumulator The following makes sure to reduce a multi-vector SLP reduction accumulator to a single vector using vector operations if easily possible (if the number of lanes in the vector type is a multiple of the number of scalar accumulators). PR tree-optimization/107247 * tree-vect-loop.cc (vect_create_epilog_for_reduction): Reduce multi vector SLP reduction accumulators. Check the adjusted number of accumulator vectors against one for the re-use in the epilogue.
