https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101615
--- Comment #3 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:6bb6e2044ced33d08175361b8e39a9c5d4a868a6 commit r12-2570-g6bb6e2044ced33d08175361b8e39a9c5d4a868a6 Author: Richard Biener <rguent...@suse.de> Date: Wed Jul 28 14:16:35 2021 +0200 tree-optimization/101615 - SLP permute opt of existing vectors This fixes one issue discovered when analyzing PR101615, namely we happily push permutes to pre-existing vectors but end up not actually permuting them. In fact we don't want to, so force materialization on the external. It doesn't fix the original testcase though. 2021-07-28 Richard Biener <rguent...@suse.de> PR tree-optimization/101615 * tree-vect-slp.c (vect_optimize_slp): Pre-existing vector external nodes cannot be permuted so make them perm_out 0. * gcc.dg/vect/bb-slp-pr101615-1.c: New testcase.
