[11u] RFR: 8059241: C2: Excessive RemoveUseless passes during incremental inlining

[Roland Westrelin]

>> I’d like to request a review for this backport of JDK-8059241
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8059241
>> Webrev: http://cr.openjdk.java.net/~dlemmond/8059241/webrev.11u.00/
>
> Ouch. We'd need a C2 specialist to have a very close look at the risk
> of backporting this.

This should mostly affect workloads that make heavy use of
invokedynamic. That alone would decrease the risk. The fix has been
integrated a while ago so it's well tested. I would say the change
itself is clearly not trivial but fairly low risk.

Roland.