New API for traversing graph

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5430 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/DSNode.h

@@ -218,6 +218,12 @@ public:
   /// specified mapping.
   void remapLinks(std::map<const DSNode*, DSNodeHandle> &OldNodeMap);
 
+  /// markReachableNodes - This method recursively traverses the specified
+  /// DSNodes, marking any nodes which are reachable.  All reachable nodes it
+  /// adds to the set, which allows it to only traverse visited nodes once.
+  ///
+  void markReachableNodes(std::set<DSNode*> &ReachableNodes);
+
 private:
   friend class DSNodeHandle;
 

include/llvm/Analysis/DSSupport.h

@@ -9,6 +9,7 @@
 
 #include <vector>
 #include <map>
+#include <set>
 #include <functional>
 #include <string>
 
@@ -214,6 +215,12 @@ public:
       getPtrArg(a).mergeWith(CS.getPtrArg(a));
   }
 
+  /// markReachableNodes - This method recursively traverses the specified
+  /// DSNodes, marking any nodes which are reachable.  All reachable nodes it
+  /// adds to the set, which allows it to only traverse visited nodes once.
+  ///
+  void markReachableNodes(std::set<DSNode*> &Nodes);
+
   bool operator<(const DSCallSite &CS) const {
     if (Callee < CS.Callee) return true;   // This must sort by callee first!
     if (Callee > CS.Callee) return false;

include/llvm/Analysis/DataStructure/DSNode.h

@@ -218,6 +218,12 @@ public:
   /// specified mapping.
   void remapLinks(std::map<const DSNode*, DSNodeHandle> &OldNodeMap);
 
+  /// markReachableNodes - This method recursively traverses the specified
+  /// DSNodes, marking any nodes which are reachable.  All reachable nodes it
+  /// adds to the set, which allows it to only traverse visited nodes once.
+  ///
+  void markReachableNodes(std::set<DSNode*> &ReachableNodes);
+
 private:
   friend class DSNodeHandle;
 

include/llvm/Analysis/DataStructure/DSSupport.h

@@ -9,6 +9,7 @@
 
 #include <vector>
 #include <map>
+#include <set>
 #include <functional>
 #include <string>
 
@@ -214,6 +215,12 @@ public:
       getPtrArg(a).mergeWith(CS.getPtrArg(a));
   }
 
+  /// markReachableNodes - This method recursively traverses the specified
+  /// DSNodes, marking any nodes which are reachable.  All reachable nodes it
+  /// adds to the set, which allows it to only traverse visited nodes once.
+  ///
+  void markReachableNodes(std::set<DSNode*> &Nodes);
+
   bool operator<(const DSCallSite &CS) const {
     if (Callee < CS.Callee) return true;   // This must sort by callee first!
     if (Callee > CS.Callee) return false;