Patch forthcoming.
Created attachment 227921 [details] the patch
Created attachment 227923 [details] the patch
Doing some more testing to make sure that enabling this doesn't hurt performance in any way. The LLVMers had expressed concerns about compile times.
(In reply to comment #3) > Doing some more testing to make sure that enabling this doesn't hurt performance in any way. The LLVMers had expressed concerns about compile times. Nope, it doesn't hurt anything. I will land.
Landed in http://trac.webkit.org/changeset/166359