https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108401
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2023-01-16 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. We expand from return { 71777214294589695, 71777214294589695, 71777214294589695, 71777214294589695 }; where we could reduce the DImode broadcast to a HImode one (if that exists). But sure, the x86 backend could implement the intrinsic suggested way to generate this particular pattern. I'll also note that -O0 produces quite bad code here.