hg: shenandoah/jdk: minor C2 cleanups

[rwestrel at redhat.com]

Changeset: 77aac8d0e404
Author:    roland
Date:      2018-10-16 13:22 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/77aac8d0e404

minor C2 cleanups

! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/subnode.cpp