The code for FTL JIT on ARM64 is already there on the JSC side, we only need to patch LLVM to support it.
Created attachment 243356 [details] Patch
Comment on attachment 243356 [details] Patch rs=me
Comment on attachment 243356 [details] Patch Clearing flags on attachment: 243356 Committed r177505: <http://trac.webkit.org/changeset/177505>
All reviewed patches have been landed. Closing bug.