RFR: Check and ensure that Shenandoah-enabled compilations succeed

[Roman Kennke]

Am 01.08.2018 um 15:22 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/comp-check/webrev.01/
> 
> This adds verification code to compiler pipeline that would fail reliably if method had failed to
> compile with Shenandoah. This allows us to track compilation bugs before we are forced to inspect
> PrintCompilation log chasing the performance regressions. I had to increase max thresholds to make
> tier3_gc_shenandoah succeed.
> 
> Testing: tier3_gc_shenandoah {fastdebug|release}, specjbb, specjvm
> 
> Thanks,
> -Aleksey
> 


I was thinking about something similar. This seems very useful, please
push it! Thanks!

Roman