RFR: 8199696: Remove Runtime1::arraycopy

[Vladimir Kozlov]

Hi Erik,

I think it is historical from time when we had Client VM with C1 only 
and not shared runtime.

Shared, x86 and Sparc changes looks good to me.

What platforms you tested on?

Thanks,
Vladimir

On 3/15/18 8:18 AM, Erik Österlund wrote:
> Hi,
> 
> The Runtime1::arraycopy stub appears to only be used on S390 because 
> there is no StubRoutines::generic_arraycopy() provided. However, C1 
> could then simply take a slow path and call its arraycopy stub that 
> performs a native call. Then this logic may be removed.
> 
> I added an assert on each platform that I think should have a 
> generic_arraycopy() stub, and added a branch to the slow path on S390 if 
> there is no such stub. If a stub is eventually added on S390, it should 
> automatically pick that up.
> 
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8199696/webrev.00/
> 
> Bug ID:
> https://bugs.openjdk.java.net/browse/JDK-8199696
> 
> Thanks,
> /Erik