Commit the initial implementation of call graph building.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@75873 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 84 insertions, 0 deletions

diff --git a/include/clang/Analysis/CallGraph.h b/include/clang/Analysis/CallGraph.h
new file mode 100644
index 0000000000..bf164c0e72
--- /dev/null
+++ b/include/clang/Analysis/CallGraph.h
@@ -0,0 +1,84 @@
+//== CallGraph.cpp - Call graph building ------------------------*- C++ -*--==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defined the CallGraph and CallGraphNode classes.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_ANALYSIS_CALLGRAPH
+#define LLVM_CLANG_ANALYSIS_CALLGRAPH
+
+#include "clang/Index/ASTLocation.h"
+#include "clang/Index/Entity.h"
+#include "clang/Index/Program.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "llvm/ADT/DenseMap.h"
+#include <vector>
+
+namespace clang {
+
+class CallGraphNode {
+  idx::Entity *F;
+  typedef std::pair<idx::ASTLocation, CallGraphNode*> CallRecord;
+  std::vector<CallRecord> CalledFunctions;
+
+public:
+  CallGraphNode(idx::Entity *f) : F(f) {}
+
+  typedef std::vector<CallRecord>::iterator iterator;
+  typedef std::vector<CallRecord>::const_iterator const_iterator;
+
+  iterator begin() { return CalledFunctions.begin(); }
+  iterator end()   { return CalledFunctions.end(); }
+  const_iterator begin() const { return CalledFunctions.begin(); }
+  const_iterator end()   const { return CalledFunctions.end();   }
+
+  void addCallee(idx::ASTLocation L, CallGraphNode *Node) {
+    CalledFunctions.push_back(std::make_pair(L, Node));
+  }
+
+  const char *getName(ASTContext &Ctx) { return F->getName(Ctx); }
+};
+
+class CallGraph {
+  /// Program manages all Entities.
+  idx::Program Prog;
+
+  typedef llvm::DenseMap<idx::Entity *, CallGraphNode *> FunctionMapTy;
+
+  /// FunctionMap owns all CallGraphNodes.
+  FunctionMapTy FunctionMap;
+
+  /// CallerCtx maps a caller to its ASTContext.
+  llvm::DenseMap<CallGraphNode *, ASTContext *> CallerCtx;
+
+public:
+  ~CallGraph();
+
+  typedef FunctionMapTy::iterator iterator;
+  typedef FunctionMapTy::const_iterator const_iterator;
+
+  iterator begin() { return FunctionMap.begin(); }
+  iterator end()   { return FunctionMap.end();   }
+  const_iterator begin() const { return FunctionMap.begin(); }
+  const_iterator end()   const { return FunctionMap.end();   }
+
+  void addTU(ASTUnit &AST);
+
+  idx::Program &getProgram() { return Prog; }
+
+  CallGraphNode *getOrInsertFunction(idx::Entity *F);
+
+  void print(llvm::raw_ostream &os);
+  void dump();
+};
+
+}
+
+#endif