Hi, when a String has a calculated hash code value of 0, we recalculate and store a 0 to the String.hash field every time (except for the empty String, which is special cased). To make String objects more amenable to storage in shared read-only memory, e.g., CDS archives, we should avoid this redundant store.
Bug: https://bugs.openjdk.java.net/browse/JDK-8221723 Webrev: http://cr.openjdk.java.net/~redestad/8221723/ Testing: tier1-3, no regression on existing and new StringHashCode micros /Claes
