I'm not convinced either. It's not clear that the compiler should do that. You just allocated a new array, and (may have) made copies of the values in the original array. Reordering the new array will not reorder the original one. etc. etc. It's not clear to me what you'd want to do in every case, let alone to a compiler.

Just curious: did you mean empathic or empathetic or emphatic? :-)