https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101207
--- Comment #8 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:2ad71efb5de9e929ffd2b8ce0a37c3c34021c0f1 commit r12-1837-g2ad71efb5de9e929ffd2b8ce0a37c3c34021c0f1 Author: Richard Biener <rguent...@suse.de> Date: Mon Jun 28 09:42:58 2021 +0200 tree-optimization/101207 - fix BB reduc permute elide with life stmts This fixes breakage of live lane extracts from permuted loads we elide from BB reduction vectorization by handling the un-permuting the same as in the regular eliding code - apply the reverse permute to both the scalar stmts and the load permutation. 2021-06-28 Richard Biener <rguent...@suse.de> PR tree-optimization/101207 * tree-vect-slp.c (vect_optimize_slp): Do BB reduction permute eliding for load permutations properly. * gcc.dg/vect/bb-slp-pr101207.c: New testcase.
