[8u20] RFR: 8039043: Implicit null check is in the wrong place in C1 -UseCompressedOops

[Igor Veresov]

8u20 backport request. The change applied cleanly.

Bug: https://bugs.openjdk.java.net/browse/JDK-8039043
Changeset: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/2e29e3e5dde2
Webrev: http://cr.openjdk.java.net/~iveresov/8039043/webrev.01/
Review: http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2014-April/013906.html

Thanks!
igor