+/// \brief The \c ModulePass which wraps up a \c CallGraph and the logic to
+/// build it.
+///
+/// This class exposes both the interface to the call graph container and the
+/// module pass which runs over a module of IR and produces the call graph. The
+/// call graph interface is entirelly a wrapper around a \c CallGraph object
+/// which is stored internally for each module.
+class CallGraphWrapperPass : public ModulePass {
+ OwningPtr<CallGraph> G;
+
+public:
+ static char ID; // Class identification, replacement for typeinfo
+
+ CallGraphWrapperPass();
+ virtual ~CallGraphWrapperPass();
+
+ /// \brief The internal \c CallGraph around which the rest of this interface
+ /// is wrapped.
+ const CallGraph &getCallGraph() const { return *G; }
+ CallGraph &getCallGraph() { return *G; }
+
+ typedef CallGraph::iterator iterator;
+ typedef CallGraph::const_iterator const_iterator;
+
+ /// \brief Returns the module the call graph corresponds to.
+ Module &getModule() const { return G->getModule(); }
+
+ inline iterator begin() { return G->begin(); }
+ inline iterator end() { return G->end(); }
+ inline const_iterator begin() const { return G->begin(); }
+ inline const_iterator end() const { return G->end(); }
+
+ /// \brief Returns the call graph node for the provided function.
+ inline const CallGraphNode *operator[](const Function *F) const {
+ return (*G)[F];
+ }
+
+ /// \brief Returns the call graph node for the provided function.
+ inline CallGraphNode *operator[](const Function *F) { return (*G)[F]; }
+
+ /// \brief Returns the \c CallGraphNode which is used to represent
+ /// undetermined calls into the callgraph.
+ CallGraphNode *getExternalCallingNode() const {
+ return G->getExternalCallingNode();
+ }
+
+ CallGraphNode *getCallsExternalNode() const {
+ return G->getCallsExternalNode();
+ }
+
+ /// \brief Returns the root/main method in the module, or some other root
+ /// node, such as the externalcallingnode.
+ CallGraphNode *getRoot() { return G->getRoot(); }
+ const CallGraphNode *getRoot() const { return G->getRoot(); }
+
+ //===---------------------------------------------------------------------
+ // Functions to keep a call graph up to date with a function that has been
+ // modified.
+ //
+
+ /// \brief Unlink the function from this module, returning it.
+ ///
+ /// Because this removes the function from the module, the call graph node is
+ /// destroyed. This is only valid if the function does not call any other
+ /// functions (ie, there are no edges in it's CGN). The easiest way to do
+ /// this is to dropAllReferences before calling this.
+ Function *removeFunctionFromModule(CallGraphNode *CGN) {
+ return G->removeFunctionFromModule(CGN);
+ }
+
+ /// \brief Similar to operator[], but this will insert a new CallGraphNode for
+ /// \c F if one does not already exist.
+ CallGraphNode *getOrInsertFunction(const Function *F) {
+ return G->getOrInsertFunction(F);
+ }
+
+ //===---------------------------------------------------------------------
+ // Implementation of the ModulePass interface needed here.
+ //
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+ virtual bool runOnModule(Module &M);
+ virtual void releaseMemory();
+
+ void print(raw_ostream &o, const Module *) const;
+ void dump() const;
+};
+