RFR 8068977 Remove unused sun.misc.Unsafe prefetch intrinsic support

[Paul Sandoz]

On Feb 5, 2015, at 6:15 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:

> Hi Paul,
> 
> These are JIT compilers changes so I added correct mailing list.
> Changes look fine to me.

Thanks.


> Make sure it passed JPRT.
> 

I will give it a run-run, it has previously passed but i want to recheck there are still no failures after rebasing.


> RFE:
> https://bugs.openjdk.java.net/browse/JDK-8068977
> 
> "Note read/write prefetch support was implemented as an experiment to see if JDK library code could use it for performance advantages. However, the results of the experiment did not indicate this was worthwhile."
> 
> Also note, there are no corresponding prefetch native methods declaration in sun.misc.Unsafe. We had it sometime in local sources for experiments but we never pushed those changes into main s.m.Unsafe sources.
> 

I updated the description.

Thanks,
Paul.
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