Improve javadoc
lzcnt inferStamp reports too large values for Integer.numberOfLeadingZeros
[SPARC] use now a dedicated scratch register for isMethodHandleReturnOffset value, as o7 may contain valuable information
HotSpotReferenceMap: fix bitmap clearing in setOop()/clearOop() and setNarrowOop()/clearNarrowOop().
LocationMarker: fix handling of illegal values.
Reenable LocationMarker.