RFR(S): 8238723: yank_alloc_node must remove membar

[Nils Eliasson]

This bug creates noise in the testing - a prompt review would be 
appreciated.

Best regards,

Nils Eliasson

On 2020-02-17 14:16, Nils Eliasson wrote:
> Hi,
>
> In my patch for improving allocation expansion (8237581) there was a 
> missing piece that can cause failures when disabling escape analysis.
>
> The alloc nodes result node may have no real uses (alloc_cast() == 
> NULL), but still have a membar that uses the result proj. This patch 
> clean up all these other uses from the result proj.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8238723
> Webrev: http://cr.openjdk.java.net/~neliasso/8238723/webrev.01/
>
> Please review,
>
> Best regards,
> Nils Eliasson