According to Sergey we need at least write adapter code for it: https://github.com/facebook/hiphop-php/pull/244/files
Hiphop mostly helps with CPU bound PHP, so it wouldn't provide any benefit to our exension, but it would be required by someone who wanted to use our extension with hiphop. Moving to 1.2 for tracking.
This is not planned any time soon.
If this is not planned any time soon, can we close this issue? Does 'not any time soon' still stand for that matter?
Its okay for it to stay open even if its not planned soon at all.
Closing as incomplete as per new workflow. 'Incomplete' should be replaced with 'Not Planned' as soon as the JIRA workflows get updated.