RFR: 8217503: ZGC: Fix fall through bug in ZBarrierSetC2::escape_add_final_edges()

[Per Liden]

Thanks Stefan!

/Per

On 1/22/19 10:56 AM, Stefan Karlsson wrote:
> Looks good.
> 
> StefanK
> 
> On 2019-01-22 10:56, Per Liden wrote:
>> The switch statement in ZBarrierSetC2::escape_add_final_edges() has a 
>> fall through bug, letting the 
>> Op_LoadBarrierSlowReg/Op_LoadBarrierWeakSlowReg case fall through into 
>> the Op_Proj case.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8217503
>> Webrev: http://cr.openjdk.java.net/~pliden/8217503/webrev.0
>>
>> /Per