Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa

Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

6459804: Want client (c1) compiler for x86_64 (amd64) for faster start-up
Reviewed-by: kvn