RFR(XS): 8073957: assert(ary_src != 0) failed: not an array or instance?

[Vladimir Kozlov]

Depending on the order of IGVN list execution different inputs could be 
set to top at different time. I would suggest to check all 
ArrayCopyNode's inputs for top.

In ideal() or ArrayCopyNode::make() we may need to test inputs (or may 
be assert) for NULL too.

Thanks,
Vladimir

On 3/2/15 2:25 AM, Roland Westrelin wrote:
> ArrayCopyNode::Ideal must better validate its input arguments in case the node is in a dead part of the graph.
>
> http://cr.openjdk.java.net/~roland/8073957/webrev.00/
>
> Roland.
>