https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91526
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jsm28 at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> so the C++ FE already elides the return copy by placing 'result' in the
> return slot while the C FE doesn't do this.
That's because in C++ the language requires NRV to be performed in certain
cases, while for C there is nothing like that and we do the tree NRV in that
case only much later (nrv pass).
Joseph, any thoughts whether it would be a valid C FE optimization that valid C
programs can't observe?
