[Bug c++/53637] NRVO not applied where there are two different variables involved

[rs2740 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53637

--- Comment #8 from TC <rs2740 at gmail dot com> ---
The standard specifies when copy elision is allowed
(http://eel.is/c++draft/class.copy#31). "return param ? a : b;" is not one of
them. "param ? a : b" is hardly "the name of a non-volatile automatic
object..."