https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89458
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-02-26
CC| |jason at gcc dot gnu.org
Component|other |c++
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that sizeof(Obj) is 256. But yes, the padding at the end of the
object need not be copied. Thus this is a missed optimization (I'm not sure we
actually store the "original" size anywhere though). Maybe the FE could
use the classtype-as-base type here?
