[Bug c++/81147] [avr] C++ for -mmcu=atmega2560 doesn't do NRVO or RVO when class inherits from empty base

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81147

--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
What you mean by "NRVO" and "RVO" ?