hg: jdk7u/jdk7u-dev/hotspot: 8038440: backport few C2 fixes

[poonam.bajaj at oracle.com]

Changeset: 042420b675e8
Author:    poonam
Date:      2014-04-09 09:14 -0700
URL:       http://hg.openjdk.java.net/jdk7u/jdk7u-dev/hotspot/rev/042420b675e8

8038440: backport few C2 fixes
Summary: Backports few C2 fixes
Reviewed-by: kvn, kevinw

! src/share/vm/opto/runtime.cpp
! src/share/vm/opto/runtime.hpp
! src/share/vm/runtime/arguments.cpp