https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120944
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:2c23368ed910a911e72af5decfc39bef11a9efac commit r15-9939-g2c23368ed910a911e72af5decfc39bef11a9efac Author: Richard Biener <rguent...@suse.de> Date: Fri Jul 4 09:08:19 2025 +0200 tree-optimization/120944 - bogus VN with volatile copies The following avoids translating expressions through volatile copies. PR tree-optimization/120944 * tree-ssa-sccvn.cc (vn_reference_lookup_3): Gate optimizations invalid when volatile is involved. * gcc.dg/torture/pr120944.c: New testcase. (cherry picked from commit 6ed1e2ae1a742d859c2dd74c9e7cebdd3618e8b1)