[Bug ipa/113478] -Os does not inline single instruction function

[hubicka at ucw dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113478

--- Comment #2 from Jan Hubicka <hubicka at ucw dot cz> ---
Probably is_inexpensive_bulitin_p should return true here?