[Analysis] Use unique_ptr for CallGraph::FunctionMap.

Reviewers: timshen

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D25427

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@283775 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Analysis/CallGraph.h

@@ -34,7 +34,8 @@ class CallGraphNode;
 class CallGraph : public RecursiveASTVisitor<CallGraph> {
   friend class CallGraphNode;
 
-  typedef llvm::DenseMap<const Decl *, CallGraphNode *> FunctionMapTy;
+  typedef llvm::DenseMap<const Decl *, std::unique_ptr<CallGraphNode>>
+      FunctionMapTy;
 
   /// FunctionMap owns all CallGraphNodes.
   FunctionMapTy FunctionMap;
@@ -198,9 +199,11 @@ template <> struct GraphTraits<clang::CallGraph*>
   static NodeType *getEntryNode(clang::CallGraph *CGN) {
     return CGN->getRoot();  // Start at the external node!
   }
-  typedef std::pair<const clang::Decl*, clang::CallGraphNode*> PairTy;
 
-  static clang::CallGraphNode *CGGetValue(PairTy P) { return P.second; }
+  static clang::CallGraphNode *
+  CGGetValue(clang::CallGraph::const_iterator::value_type &P) {
+    return P.second.get();
+  }
 
   // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
   typedef mapped_iterator<clang::CallGraph::iterator, decltype(&CGGetValue)>
@@ -223,9 +226,11 @@ template <> struct GraphTraits<const clang::CallGraph*> :
   static NodeType *getEntryNode(const clang::CallGraph *CGN) {
     return CGN->getRoot();
   }
-  typedef std::pair<const clang::Decl*, clang::CallGraphNode*> PairTy;
 
-  static clang::CallGraphNode *CGGetValue(PairTy P) { return P.second; }
+  static clang::CallGraphNode *
+  CGGetValue(clang::CallGraph::const_iterator::value_type &P) {
+    return P.second.get();
+  }
 
   // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
   typedef mapped_iterator<clang::CallGraph::const_iterator,

lib/Analysis/CallGraph.cpp

@@ -104,9 +104,7 @@ CallGraph::CallGraph() {
   Root = getOrInsertNode(nullptr);
 }
 
-CallGraph::~CallGraph() {
-  llvm::DeleteContainerSeconds(FunctionMap);
-}
+CallGraph::~CallGraph() {}
 
 bool CallGraph::includeInGraph(const Decl *D) {
   assert(D);
@@ -142,22 +140,22 @@ void CallGraph::addNodeForDecl(Decl* D, bool IsGlobal) {
 CallGraphNode *CallGraph::getNode(const Decl *F) const {
   FunctionMapTy::const_iterator I = FunctionMap.find(F);
   if (I == FunctionMap.end()) return nullptr;
-  return I->second;
+  return I->second.get();
 }
 
 CallGraphNode *CallGraph::getOrInsertNode(Decl *F) {
   if (F && !isa<ObjCMethodDecl>(F))
     F = F->getCanonicalDecl();
 
-  CallGraphNode *&Node = FunctionMap[F];
+  std::unique_ptr<CallGraphNode> &Node = FunctionMap[F];
   if (Node)
-    return Node;
+    return Node.get();
 
-  Node = new CallGraphNode(F);
+  Node = llvm::make_unique<CallGraphNode>(F);
   // Make Root node a parent of all functions to make sure all are reachable.
   if (F)
-    Root->addCallee(Node, this);
-  return Node;
+    Root->addCallee(Node.get(), this);
+  return Node.get();
 }
 
 void CallGraph::print(raw_ostream &OS) const {