Add template specializations to view the call graph in dot format.
 - change the DenseMap used in callgraph to std::map, since DenseMap cannot
   be used with mapped_iterator and friends.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76874 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed