https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110762
--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Richard Biener from comment #7) > I guess for the specific usage we need to wrap this in an UNSPEC? Probably, so a MOVQ xmm, xmm insn should be emitted for __builtin_ia32_storelps (AKA _mm_storel_pi), so the top 64bits will be cleared. There is already *vec_concatv4sf_0 that looks appropriate to implement the move.
