RFR 8227635: Shenandoah: SHBSA::load_at() needs to deal IN_NATIVE load

[Roland Westrelin]

> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8227635/webrev.00/index.html

Do you really need to save vector registers? Isn't this called from the
interpreter only?

Roland.