I'm going to streamline CSE around clobberize(), and so Flush(SetLocal) store elimination wouldn't belong anymore. It doesn't quite belong anywhere, which means that it belongs in StrengthReductionPhase.
Created attachment 234584 [details]
Not yet ready for review because I'm still testing it
Created attachment 234588 [details]
Created attachment 234614 [details]
Comment on attachment 234614 [details]
Landed in http://trac.webkit.org/changeset/170929