[llvm] r296863 - [SLP] Fixes the bug due to absence of in order uses of scalars which needs to be available

[Keno Fischer via llvm-commits]

Sorry to burst in here with an unrelated problem, but I'd like to
teach the SLP vectorizer about 2->4 element broadcasts, which is
somewhat similar (requires a shufflevector after the load to do the
broadcast), so it would be nice to co-ordinate and use the same
representation for both. Maybe start an llvm-dev thread to discuss
this design?

Keno