RFR: 8234562: Move OrderAccess::release_store*/load_acquire to Atomic

[Stefan Karlsson]

Hi all,

I'd like to propose that we move release_store, release_store_fence, and 
load_acquire, from OrderAccess to Atomic.

https://cr.openjdk.java.net/~stefank/8234562/webrev.01/
https://bugs.openjdk.java.net/browse/JDK-8234562

Atomic already has the relaxed store and load, among other functions for 
concurrent access, but release_store, release_store_fence, and 
load_acquire, are located in OrderAccess.

After this change there's an inconsistency in the order of the 
parameters in the store functions in the Atomic API:

  void store(T store_value, volatile D* dest)
  void release_store(volatile D* dest, T store_value)
  void release_store_fence(volatile D* dest, T store_value)

I'd like to address that in a separate RFE, where I propose that we move 
the dest parameter to the left for all the Atomic functions. See:
https://bugs.openjdk.java.net/browse/JDK-8234563

I've tested this patch with tier1-7. I've also built fastdebug on the 
following configs: aarch64, arm32, ppc64le, s390x, shenandoah, zero, 
minimal, just to minimize any disruptions.

Thanks,
StefanK