Commit improved version of 111026 & 111027.

Unused warnings for functions:
-static functions
-functions in anonymous namespace
-class methods in anonymous namespace
-class method specializations in anonymous namespace
-function specializations in anonymous namespace

Unused warnings for variables:
-static variables
-variables in anonymous namespace
-static data members in anonymous namespace
-static data members specializations in anonymous namespace

Reveals lots of opportunities for dead code removal in llvm codebase that will
interest my esteemed colleagues.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111086 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed