https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114709
--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-13 branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:d3659e2dfcc6db83391cd2c6d70097cba35eb4b9 commit r13-8765-gd3659e2dfcc6db83391cd2c6d70097cba35eb4b9 Author: Patrick Palka <ppa...@redhat.com> Date: Wed Apr 24 17:49:56 2024 -0400 c++: constexpr union member access folding [PR114709] The object/offset canonicalization performed in cxx_fold_indirect_ref is undesirable for union member accesses because it loses information about the member being accessed which we may later need to diagnose an inactive-member access. So this patch restricts the canonicalization accordingly. PR c++/114709 gcc/cp/ChangeLog: * constexpr.cc (cxx_fold_indirect_ref): Restrict object/offset canonicalization to RECORD_TYPE member accesses. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/constexpr-union8.C: New test. Reviewed-by: Jason Merrill <ja...@redhat.com> (cherry picked from commit 0844170e9ef60a8b2f6fba6786672f30ce1c2749)
