hg: jdk9/hs/hotspot: 8175345: Reported null pointer dereference defect groups

[rahul.v.raghavan at oracle.com]

Changeset: 55e3f1f3d0a7
Author:    rraghavan
Date:      2017-03-09 00:16 -0800
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/55e3f1f3d0a7

8175345: Reported null pointer dereference defect groups
Summary: Added required explicit NULL checks
Reviewed-by: thartmann, kvn

! src/share/vm/opto/callnode.cpp
! src/share/vm/opto/ifnode.cpp
! src/share/vm/opto/loopTransform.cpp
! src/share/vm/opto/stringopts.cpp