[Bug libstdc++/91356] Poor optimization of calls involving std::unique_ptr

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91356

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, when configured with --enable-symvers=gnu-versioned-namespace

But that's just for the library, you'd still need a change to the Itanium ABI.