[13] RFR(XS):8226287: Make process_users_of_allocation handle gc barriers

[Nils Eliasson]

I need a second reviewer.

// Nils

On 2019-06-19 14:49, Nils Eliasson wrote:
>
> Hi,
>
> This patch fixes a minor problem in process_users_of_allocation in 
> macro.cpp. When removing the initalize node we must handle the case 
> that there is a gc barrier in the control flow.
>
> This patch strengthens the requirement that the zgc loadbarrier node 
> has a control out when expanding.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8226287 
> <https://bugs.openjdk.java.net/browse/JDK-8226287?>
>
> Webrev: http://cr.openjdk.java.net/~neliasso/8226287/webrev.01/
>
> Please review,
>
> Regards,
>
> Nils
>
>
>