Add a pass to do call graph analyis to overlay the autos and frame sections of

Add a pass to do call graph analyis to overlay the autos and frame sections of
leaf functions. This pass will be extended to color other nodes of the call tree
as well in future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79631 91177308-0d34-0410-b5e6-96231b3b80d8