I tried to do this clever forward-flow based materialization point placement, and I messed up loops.
Created attachment 239046 [details] the patch
Comment on attachment 239046 [details] the patch r=me
Comment on attachment 239046 [details] the patch Clearing flags on attachment: 239046 Committed r174173: <http://trac.webkit.org/changeset/174173>
All reviewed patches have been landed. Closing bug.