Add getDecl() to CallGraph and CallGraphNode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76940 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CallGraph.cpp b/lib/Analysis/CallGraph.cpp
index 07c2b35..1e28411 100644
--- a/lib/Analysis/CallGraph.cpp
+++ b/lib/Analysis/CallGraph.cpp
@@ -108,6 +108,13 @@
   return Node = new CallGraphNode(F);
 }
 
+Decl *CallGraph::getDecl(CallGraphNode *Node) {
+  // Get the function's context.
+  ASTContext *Ctx = CallerCtx[Node];
+
+  return Node->getDecl(*Ctx);
+}
+
 void CallGraph::print(llvm::raw_ostream &os) {
   for (iterator I = begin(), E = end(); I != E; ++I) {
     if (I->second->hasCallee()) {