Fix PR8639 by making the "argument unused during compilation" less agressive. Now we
don't warn if an argument is not used because it is shadowed by a subsequent argument.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122281 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed