RFR(XS): 8183233: [MVT] "unexpected value type klass" assert in ValueTypeNode::is_loaded()

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8183233
http://cr.openjdk.java.net/~thartmann/valhalla/vt_prototype/webrev.27/

CompileTheWorld hits an assert during compilation when processing the __Value klass. The problem is that C->env()->___Value_klass() is NULL because __Value is not loaded in SystemDictionary::initialize_wk_klass() if !EnableMVT && !EnableValhalla. We should enable MVT if CompileTheWorld is true.

Thanks,
Tobias