> %temp = shufflevector <3 x i16> %incoming, <3 x i16> undef, <4 x i32> > <i32 0, i32 1, i32 2, i32 undef> > %out = bitcast <4 x i16> %temp to i64 I seem to have misread the destination type, you'd obviously want "<1 x i64>" instead of "i64" in everything I've written. Tim.