RFR (S): 8181787: Remove Solaris SPARC GCC code

[coleen.phillimore at oracle.com]

Erik,  Looks good.  It was an ancient experiment to enable case labels 
in bytecodeInterpreter.cpp on solaris.
thanks,
Coleen

On 6/8/17 11:06 AM, Erik Österlund wrote:
> Hi,
>
> The only supported way of building OpenJDK on Solaris is via the 
> studio compiler. However, there are unsupported code paths that are 
> enabled only if _GNU_SOURCE is defined. This might be problematic for 
> multiple reasons. Checking for _GNU_SOURCE does not check for GCC, it 
> checks whether the standard library is the GNU standard library. Most 
> importantly, the code has been bit rotting and e.g. the inline 
> assembly for atomic seems to have flaws. Since we never test the 
> correctness of these code paths, I propose to remove this unsupported 
> code.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8181787
>
> Webrev: http://cr.openjdk.java.net/~eosterlund/8181787/webrev.00/
>
> Testing: JPRT
>
> Will need a sponsor.
>
> Thanks,
> /Erik