// Use dedicated unpack instructions for masks that match their pattern.
if (isShuffleEquivalent(Mask, 0, 0, 1, 1, 2, 2, 3, 3))
return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, V, V);
if (isShuffleEquivalent(Mask, 4, 4, 5, 5, 6, 6, 7, 7))
return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i16, V, V);
// Use dedicated unpack instructions for masks that match their pattern.
if (isShuffleEquivalent(Mask, 0, 0, 1, 1, 2, 2, 3, 3))
return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, V, V);
if (isShuffleEquivalent(Mask, 4, 4, 5, 5, 6, 6, 7, 7))
return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i16, V, V);