RFR (S): 8153439: do not install an empty SpeculationLog in an nmethod

Doug Simon doug.simon at oracle.com
Mon Apr 4 21:30:02 UTC 2016

The JVMCI speculation log mechanism might not be used by a specific JVMCI compiler or JVMCI compiler configuration. In this case, the nmethod::_speculation_log field should be initialized to NULL to reduce unnecessary processing of the field by the GC.


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