https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114027
--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-13 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:bd276b5340563182f7d95c383196fdd6fb7e6a1d commit r13-8479-gbd276b5340563182f7d95c383196fdd6fb7e6a1d Author: Richard Biener <rguent...@suse.de> Date: Thu Feb 22 10:50:12 2024 +0100 tree-optimization/114027 - conditional reduction chain When we classify a conditional reduction chain as CONST_COND_REDUCTION we fail to verify all involved conditionals have the same constant. That's a quite unlikely situation so the following simply disables such classification when there's more than one reduction statement. PR tree-optimization/114027 * tree-vect-loop.cc (vecctorizable_reduction): Use optimized condition reduction classification only for single-element chains. * gcc.dg/vect/pr114027.c: New testcase. (cherry picked from commit 549f251f055e3a0b0084189a3012c4f15d635e75)
