[PM] Pull the two helpers for this pass into static functions. There are
no members for them to use.

Also, make them accept references as there is no possibility of a null
pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226994 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed