Peek through barriers in Node::eqv_uncast()

[Aleksey Shipilev]

On 10/17/2018 12:05 PM, Roman Kennke wrote:
> Yes, indeed. But let's spin it a bit in Shenandoah first, shall we?
> In-fact, I want to run the lucene suite a few more times before even
> pushing it, each run takes 1-2hours so maybe until EOD? This frickin bug
> tends to be very spurious.

Regardless if it fixes the current bug, it look as general thing to deal with for all GCs. So, why
wait for those results? Maybe pass it via jdk-submit and RFR upstream directly?

> http://cr.openjdk.java.net/~rkennke/c2-eqv/webrev.01/

Looks good to me. The comment needs to mention GC barriers too?

 463   // Return whether two Nodes are equivalent, after stripping casting.
 464   bool eqv_uncast(const Node* n) const;

Renaming the method would probably be quite intrusive...

-Aleksey