RFR (XS): 8139675: Record C2 compilation of unexpectedly large methods as a failure instead of crashing

[S. Bharadwaj Yadavalli]

I'd like to request for a review of the change at [2] to address [1].

This changes a method size assertion during compilation to record 
compilation failure and return gracefully.

Thanks,

Bharadwaj

[1] https://bugs.openjdk.java.net/browse/JDK-8139675
[2] http://cr.openjdk.java.net/~bharadwaj/8139675/webrev/