https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116973
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- While recovering the absymal code-generation of gcc.dg/vect/pr52252-st.c is likely not of uttermost priority the missing opportunity is for the case of single element interleaving that can be vectorized by loading exactly one scalar element from each vector and building up the vector. This is what we'd code-generate by using VMAT_ELEMENTWISE but I have not yet made up my mind if we want to classify it as such. Lowering this to an interleaving scheme (which is what we do without SLP) is going to generate worse code.
