RFR: 8255999: Shenandoah: Invoke native-LRB only on non-strong refs, again

[Aleksey Shipilev]

On Fri, 6 Nov 2020 21:11:08 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> In JDK-8255691, I changed the condition for invoking native-LRB only on non-strong-refs. Somehow, when merging JDK-8254315, I got the condition wrong again. 
> 
> Testing: hotspot_gc_shenandoah

This makes sense. Looks good.

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1101