hg: jdk9/hs/hotspot: 8176518: C2: Invalid ImplicitNullChecks with non-protected heap base

[zoltan.majo at oracle.com]

Changeset: fa10bec35262
Author:    mdoerr
Date:      2017-03-20 11:32 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/fa10bec35262

8176518: C2: Invalid ImplicitNullChecks with non-protected heap base
Summary: Avoid generating implicit null checks if heap base is not protected
Reviewed-by: zmajo

! src/share/vm/opto/lcm.cpp
+ test/compiler/c2/TestNPEHeapBased.java