[Bug c/87387] trunk/gcc/builtins.c:585:7: warning: -Wself-assign problem

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87387

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Looks like an old implementation:

https://gcc.gnu.org/ml/gcc-patches/2010-06/msg02390.html

It might be worth using this as a starting point.