http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22141
--- Comment #23 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-12 11:20:35 UTC --- As we have MEM_REF available we can in theory do the combining on the tree-level as well (or during gimplification). In fact, as we have the byteswap detection pass which does not yet handle byte-swapping memory (thus, a memory destination) it looks like a perfect place to handle this while also fixing that deficiency (gather sources for a contiguous piecewise stored memory region of suitable register size/alignment).
