https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98855
--- Comment #6 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:7002a33d1ba81e4577d965fb9daaee146b31faa8 commit r11-7099-g7002a33d1ba81e4577d965fb9daaee146b31faa8 Author: Richard Biener <rguent...@suse.de> Date: Thu Feb 4 12:08:47 2021 +0100 tree-optimization/98855 - fix some vectorizer cost issues This fixes us not costing vectorized bswap for SLP as well as avoiding biasing to the vectorized side when costing single-argument PHIs. Instead we assume coalescing here and cost them with zero cost for both the scalar and vectorized code. This doesn't fix the PR on its own. 2021-02-04 Richard Biener <rguent...@suse.de> PR tree-optimization/98855 * tree-vect-loop.c (vectorizable_phi): Do not cost single-argument PHIs. * tree-vect-slp.c (vect_bb_slp_scalar_cost): Likewise. * tree-vect-stmts.c (vectorizable_bswap): Also perform costing for SLP operation.
