In the most recent release of JShrink I pledged full HHVM support, and since then have been running our full test suite against the 3.0 release as well as the nightly builds. Well, it seems that HHVM has itself committed to supporting JShrink, as they've added it to their own framework compatibility test suite.
For the last week JShrink has been present on the HHVM Compatibility Dashboard, where it is one of 24 projects that are working at 100%. I'm proud to publish code that supports HHVM, and am very excited that JShrink is one of the projects used to test compatibility of HHVM against the existing php ecosystem.