https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108314
--- 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:554bb9b61e2b76d4ace16a3f766b98ea887b17f4 commit r13-5089-g554bb9b61e2b76d4ace16a3f766b98ea887b17f4 Author: Richard Biener <rguent...@suse.de> Date: Tue Jan 10 10:42:21 2023 +0100 tree-optimization/108314 - avoid BIT_NOT optimization for extract-last The extract-last reduction internal function expects the then and else clause as vector and scalar and thus we cannot perform optimization of the inversion of the condition by swapping the then/else clauses. PR tree-optimization/108314 * tree-vect-stmts.cc (vectorizable_condition): Do not perform BIT_NOT_EXPR optimization for EXTRACT_LAST_REDUCTION. * gcc.dg/vect/pr108314.c: New testcase.