RFR: JDK-8221766: Load-reference barriers for Shenandoah

[Aleksey Shipilev]

On 4/4/19 12:27 PM, Roman Kennke wrote:
> - we need enter()/leave() around the barrier because this is now called in some places that don't
> have a proper frame, yet.

Is it better to put enter/leave we actually call LRB from? I don't know the full implications of
this, though.

> Incremental:
> http://cr.openjdk.java.net/~rkennke/JDK-8221766/webrev.02.diff/
> Full:
> http://cr.openjdk.java.net/~rkennke/JDK-8221766/webrev.02/

Looks okay to me. Andrew needs to take a look at aarch64 code. This patch fixes AArch64 problems for me.

-Aleksey