[lworld] RFR JDK-8207259: Ensure VarHandle compare and set/exchange work for value types

[mandy chung]

Hi Tobias,

On 8/27/18 6:32 AM, Tobias Hartmann wrote:
> Hi Mandy,
> 
> seems like the patch in the webrev is outdated as it contains only some of the files:
> http://cr.openjdk.java.net/~mchung/valhalla/webrevs/8207259/webrev.01/lworld-dev.changeset

Oops..  I fixed it.

> On 15.08.2018 19:45, mandy chung wrote:
>> - The new VarHandleTestAccessPoint test crashes (SIGSEGV) when running
>>    with compiler.  I will file a JBS issue separately.  So the test
>>    for now will run only with -Xint.
> 
> I can reproduce this and filed:
> https://bugs.openjdk.java.net/browse/JDK-8209989

Thanks for filing it and assertion fails at valuetypenode.cpp:909 is
what I ran into.

Mandy