RFR: 8199685: Access arraycopy build failure with GCC 7.3.1

[Roman Kennke]

Am 15.03.2018 um 14:06 schrieb Erik Österlund:
> Hi,
> 
> Newer compilers are not happy with arraycopy since recent changes made
> RawAccessBarrier accept 5 arguments instead of 3, and there was an
> unused path in Access for HeapWord* arraycopy, that was not expanded,
> that still tried to call an internal arraycopy function with 3 arguments.
> 
> The problematic unexpanded overload in RawAccessBarrier for HeapWord*
> addresses has been removed. Instead, the HeapWord logic for performing
> Raw oop arraycopy when it is not known whether compressed oops is used
> or not has been moved to an earlier stage (reduce_types) to better
> reflect how this logic is consistently handled for the other accessors
> with the same HeapWord* logic, to make the code more symmetric.
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8199685
> 
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8199685/webrev.00/
> 
> Thanks,
> /Erik

Looks ok.