RFR(XS): 8227384: C2 compilation fails with "graph should be schedulable" when running with -XX:-EliminateLocks

[Roland Westrelin]

Hi Jamsheed,

> Please consider floating loads moving above safepoint case due same 
> memory state case as described in bug 
> https://bugs.openjdk.java.net/browse/JDK-8213825
>
> test case in bug report.

You're right. So loads are pinned for a good reason and my proposed fix
is wrong. I will rework it.

Thanks!

Roland.