https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124035
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > I thought there was a bug report saying we should lower memcpy with a > constant always to an array copy already. That doesn't help vectorization though which does not handle aggregate copies.
