RFR(S): 8086046: escape analysis generates incorrect code as of B67

[Roland Westrelin]

Thanks for the review, Vladimir.

Roland.

> On Jun 12, 2015, at 6:53 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> This looks good. Thanks, Roland.
> 
> Vladimir
> 
> On 6/12/15 6:01 AM, Roland Westrelin wrote:
>> http://cr.openjdk.java.net/~roland/8086046/webrev.00/
>> 
>> The membar_for_arraycopy() code returns true if the MemBarNode is a membar following an arraycopy that can modify memory t_oop. After an ArrayCopyNode is expanded, that code must work with a subgraph that merges multiple code path. The membar_for_arraycopy() didn’t correctly match on that graph pattern. To be safer, I also made some change so the membar_for_arraycopy() code not only recognizes calls to fast path stubs but also the CallStaticJavaNode for the “slow_arraycopy”.
>> 
>> Roland.
>>