Reviewed-by: dcubed, dholmes
Contributed-by: james.cheng@oracle.com

Reviewed-by: kvn

8055530: assert(_exits.control()->is_top() || !_gvn.type(ret_phi)->empty()) failed: return value must be well defined
Summary: concurrent class loading causes return phi to become top
Reviewed-by: kvn

Reviewed-by: dsamersoff, sspitsyn, sla

Reviewed-by: dsamersoff, erikj

8076995: gc/ergonomics/TestDynamicNumberOfGCThreads.java failed with java.lang.RuntimeException: 'new_active_workers' missing from stdout/stderr
Reviewed-by: jmasa, drwhite

Reviewed-by: jmasa, kbarrett, tschatzl

Reviewed-by: kvn

Reviewed-by: dcubed, dsamersoff

Reviewed-by: kbarrett, tschatzl