Track a retain+release nesting level independently of the
known-incremented level, because the two concepts can be used
to prove the saftey of a retain+release removal in different
ways.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138016 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed