RFR(S): 8224496: Shenandoah compilation fails with assert(is_CountedLoopEnd()) failed: invalid node class

[Roman Kennke]

The fix looks good to me! Thanks!

Roman

> http://cr.openjdk.java.net/~roland/8224496/webrev.00/
> 
> Expanding a barrier in the outer loop of a strip mined loop nest
> confuses the loop strip mining verification logic. This is not a new
> problem and the way this relatively rare case has been handled so far is
> by turning the outer strip mined loop into a regular loop so the
> verification logic doesn't trigger. In the move to the new barrier
> scheme, some of that logic was dropped. This fix puts it back and also
> fixes a bug that it causes.
> 
> Roland.
> 

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