https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95730
--- Comment #1 from Andrew Stubbs <ams at gcc dot gnu.org> --- GCN uses TImode for a few special purposes, but lacks real TImode support. (Basically, it allows TImode loads and stores for the SLP fake vectorization, and there's one instruction that needs two DImode values in consecutive registers.) Probably this is a GCN-specific issue, and we should be finding another way to handle the quasi-128-bit values.
