Patch forthcoming.
Created attachment 220946 [details] the patch
Landed on branch in http://trac.webkit.org/changeset/161782
Comment on attachment 220946 [details] the patch r=me
Checking based on Webkit BugID on GitHub, this does not seem to have landed in Webkit. But this merge seems to indicate that it was there: https://github.com/WebKit/WebKit/commit/d1dc59d1a73a769a14710d8ab9796fad618b5716 if I search for "invalidationPointElimination", I can see related code. Appreciate if someone can mark this bug accordingly. Thanks!