RFR (XS): 8218192: Remove copy constructor for MemRegion

[Thomas Schatzl]

Hi,

On Tue, 2019-02-05 at 08:25 -0800, Man Cao wrote:
> Hi all,
> 
> Could I have reviews for this small patch?
> Webrev: https://cr.openjdk.java.net/~manc/8218192/webrev.00/
> RFE: https://bugs.openjdk.java.net/browse/JDK-8218192
> 
> This will improve G1 write barrier performance for jython in DaCapo,
> when building HotSpot with LLVM. More Background and performance
> numbers are included in the JBS.

  looks good.

Now we would only need to know whether there could be more similar
issues around....

Thomas