https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68810
--- Comment #18 from David Malcolm <dmalcolm at gcc dot gnu.org> --- ...but presumably a question here is "what is the ideal output of the compiler for that code?", and the answer might be: constexpr-reinterpret1.C:19:??: error: reinterpret_cast from integer to pointer { return *((Inner *)4); } ^~~~~~~~~~ and it ought to be possible to implement that with the more ambitious v3 patch kit.