[8u40] RFR(S): 8059621: JVM crashes with "unexpected index type" assert in LIRGenerator::do_UnsafeGetRaw

[Igor Veresov]

Webrev: http://cr.openjdk.java.net/~iveresov/8059621/webrev.00
JBS:  https://bugs.openjdk.java.net/browse/JDK-8059621
JDK9 changeset: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/f4aadd8a5168

Thanks!
igor