RFR(XS): 8149797: Compilation fails with "assert(in_hash) failed: node should be in igvn hash table"

[Roland Westrelin]

Thanks for the review.

Roland.
> On Feb 15, 2016, at 6:04 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> Good.
> 
> Thanks,
> Vladimir
> 
> On 2/15/16 6:19 AM, Roland Westrelin wrote:
>> http://cr.openjdk.java.net/~roland/8149797/webrev.00/
>> 
>> The code that looks for a dominating cast that is “as good or better” finds a dead cast and uses it.
>> 
>> Roland.
>>