RFR 8154737: Rename VarHandle.compareAndExchangeVolatile to VarHandle.compareAndExchange

[Paul Sandoz]

Hi,

Please review:

  http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8154737-vh-cae-volatile-rename/webrev/ <http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8154737-vh-cae-volatile-rename/webrev/>

This patch renames VarHandle.compareAndExchangeVolatile to VarHandle.compareAndExchange so the naming scheme is consistent with compareAndSet, and is also a little shorter.

The patch is based off hs-comp to keep in sync with other recently pushed changes and avoid possible merging issues. Hence why hotspot-compiler-dev is included, although there are no changes to hotspot.

CCC is approved. This issue is granted an FC exception under JEP 193.

I created a follow on issue to rename the internal Unsafe methods.

  https://bugs.openjdk.java.net/browse/JDK-8159995 <https://bugs.openjdk.java.net/browse/JDK-8159995>

But we can do that post 9.

Thanks,
Paul.
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