https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127588
--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-16 branch has been updated by Richard Biener <[email protected]>: https://gcc.gnu.org/g:387ecb88e60fd276e84b8952e1c2f37ed911c3fa commit r16-9856-g387ecb88e60fd276e84b8952e1c2f37ed911c3fa Author: Richard Biener <[email protected]> Date: Fri Sep 25 09:36:09 2026 +0200 tree-optimization/127588 - avoid UB in epilog IV init computation The following avoids UB when computing the start value of the epilog IV value which we compute as init + step * vect-niters where the step * vect-niters computation can overflow. PR tree-optimization/127588 * tree-vect-loop-manip.cc (vect_update_ivs_after_vectorizer): Use an unsigned type to compute the epilog start value. * gcc.dg/vect/vect-iv-15.c: New testcase. (cherry picked from commit 0a970b2702183d290df044858fd4df13ef698924)
