hg: jdk7u/jdk7u/hotspot: 8028471: PPC64 (part 215): opto: Extend ImplicitNullCheck optimization.

[goetz.lindenmaier at sap.com]

Changeset: 12b2ef172230
Author:    goetz
Date:      2017-02-16 08:07 +0100
URL:       http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/rev/12b2ef172230

8028471: PPC64 (part 215): opto: Extend ImplicitNullCheck optimization.
Summary: Other parts of this change came with "8165807: PPC64: Backport PPC64 port to OpenJDK 7"
Reviewed-by: andrew

! src/os/bsd/vm/os_bsd.hpp
! src/share/vm/opto/lcm.cpp