We need to port the following changes to lworld:

Implement fast class initialization checks:
https://bugs.openjdk.java.net/browse/JDK-8223173
https://bugs.openjdk.java.net/browse/JDK-8223213

JNI upcalls should bypass class initialization barrier in c2i adapter
https://bugs.openjdk.java.net/browse/JDK-8227260


Because the code is missing in lworld, runtime/clinit/ClassInitBarrier.java fails with guarantee(callee != NULL && callee->is_method()) failed: bad handshake

See here:
https://hg.openjdk.java.net/valhalla/valhalla/file/ff8e4784d98c/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp#l794
https://hg.openjdk.java.net/valhalla/valhalla/file/ff8e4784d98c/src/hotspot/share/runtime/sharedRuntime.cpp#l1499