RFR: 8162771: Strict equality operators should not be optimistic

[Hannes Wallnöfer]

Please review 8162771: Strict equality operators should not be optimistic.

Bug: https://bugs.openjdk.java.net/browse/JDK-8162771
Webrev: http://cr.openjdk.java.net/~hannesw/8162771/webrev/

Thanks,
Hannes