diff --git a/examples/wpa/clang-wpa.cpp b/examples/wpa/clang-wpa.cpp
index 74ec368..1caa3b9 100644
--- a/examples/wpa/clang-wpa.cpp
+++ b/examples/wpa/clang-wpa.cpp
@@ -129,7 +129,7 @@
   AnalysisManager AMgr(TU->getASTContext(), PP.getDiagnostics(),
                        PP.getLangOptions(), /* PathDiagnostic */ 0,
                        CreateRegionStoreManager,
-                       CreateRangeConstraintManager,
+                       CreateRangeConstraintManager, &Idxer,
                        /* MaxNodes */ 300000, /* MaxLoop */ 3,
                        /* VisualizeEG */ false, /* VisualizeEGUbi */ false,
                        /* PurgeDead */ true, /* EagerlyAssume */ false,
@@ -139,7 +139,7 @@
                                          AMgr.getLangOptions());
   GRExprEngine Eng(AMgr, TF);
 
-  Eng.ExecuteWorkList(AMgr.getStackFrame(FD), AMgr.getMaxNodes());
+  Eng.ExecuteWorkList(AMgr.getStackFrame(FD, TU), AMgr.getMaxNodes());
   
   return 0;
 }
diff --git a/include/clang/Analysis/AnalysisContext.h b/include/clang/Analysis/AnalysisContext.h
index 9ebd93b..584173a 100644
--- a/include/clang/Analysis/AnalysisContext.h
+++ b/include/clang/Analysis/AnalysisContext.h
@@ -34,11 +34,16 @@
 class LocationContextManager;
 class StackFrameContext;
 
+namespace idx { class TranslationUnit; }
+
 /// AnalysisContext contains the context data for the function or method under
 /// analysis.
 class AnalysisContext {
   const Decl *D;
 
+  // TranslationUnit is NULL if we don't have multiple translation units.
+  const idx::TranslationUnit *TU;
+
   // AnalysisContext owns the following data.
   CFG *cfg;
   bool builtCFG;
@@ -48,14 +53,18 @@
   llvm::BumpPtrAllocator A;
   bool AddEHEdges;
 public:
-  AnalysisContext(const Decl *d, bool addehedges = false)
-    : D(d), cfg(0), builtCFG(false), liveness(0), PM(0),
+  AnalysisContext(const Decl *d, const idx::TranslationUnit *tu,
+                  bool addehedges = false)
+    : D(d), TU(tu), cfg(0), builtCFG(false), liveness(0), PM(0),
       ReferencedBlockVars(0), AddEHEdges(addehedges) {}
 
   ~AnalysisContext();
 
   ASTContext &getASTContext() { return D->getASTContext(); }
-  const Decl *getDecl() { return D; }
+  const Decl *getDecl() const { return D; }
+
+  const idx::TranslationUnit *getTranslationUnit() const { return TU; }
+
   /// getAddEHEdges - Return true iff we are adding exceptional edges from
   /// callExprs.  If this is false, then try/catch statements and blocks
   /// reachable from them can appear to be dead in the CFG, analysis passes must
@@ -82,7 +91,7 @@
 public:
   ~AnalysisContextManager();
 
-  AnalysisContext *getContext(const Decl *D);
+  AnalysisContext *getContext(const Decl *D,const idx::TranslationUnit *TU = 0);
 
   // Discard all previously created AnalysisContexts.
   void clear();
@@ -109,6 +118,10 @@
 
   AnalysisContext *getAnalysisContext() const { return Ctx; }
 
+  const idx::TranslationUnit *getTranslationUnit() const { 
+    return Ctx->getTranslationUnit(); 
+  }
+
   const LocationContext *getParent() const { return Parent; }
 
   bool isParentOf(const LocationContext *LC) const;
diff --git a/include/clang/Analysis/ProgramPoint.h b/include/clang/Analysis/ProgramPoint.h
index 075838d..24bbf22 100644
--- a/include/clang/Analysis/ProgramPoint.h
+++ b/include/clang/Analysis/ProgramPoint.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_ANALYSIS_PROGRAM_POINT
 #define LLVM_CLANG_ANALYSIS_PROGRAM_POINT
 
+#include "clang/Analysis/AnalysisContext.h"
 #include "clang/Analysis/CFG.h"
 #include "llvm/System/DataTypes.h"
 #include "llvm/ADT/DenseMap.h"
@@ -26,6 +27,7 @@
 namespace clang {
 
 class LocationContext;
+class AnalysisContext;
 class FunctionDecl;
 
 class ProgramPoint {
@@ -313,16 +315,16 @@
 
 class CallEnter : public StmtPoint {
 public:
-  // CallEnter uses the caller's location context.
-  CallEnter(const Stmt *S, const FunctionDecl *fd, const LocationContext *L)
-    : StmtPoint(S, fd, CallEnterKind, L, 0) {}
+  // L is caller's location context. AC is callee's AnalysisContext.
+  CallEnter(const Stmt *S, const AnalysisContext *AC, const LocationContext *L)
+    : StmtPoint(S, AC, CallEnterKind, L, 0) {}
 
   const Stmt *getCallExpr() const {
     return static_cast<const Stmt *>(getData1());
   }
 
-  const FunctionDecl *getCallee() const {
-    return static_cast<const FunctionDecl *>(getData2());
+  const AnalysisContext *getCalleeContext() const {
+    return static_cast<const AnalysisContext *>(getData2());
   }
 
   static bool classof(const ProgramPoint *Location) {
diff --git a/include/clang/Checker/PathSensitive/AnalysisManager.h b/include/clang/Checker/PathSensitive/AnalysisManager.h
index 3c7cb68..3f67361 100644
--- a/include/clang/Checker/PathSensitive/AnalysisManager.h
+++ b/include/clang/Checker/PathSensitive/AnalysisManager.h
@@ -21,6 +21,11 @@
 
 namespace clang {
 
+namespace idx { 
+  class Indexer;
+  class TranslationUnit; 
+}
+
 class AnalysisManager : public BugReporterData {
   AnalysisContextManager AnaCtxMgr;
   LocationContextManager LocCtxMgr;
@@ -35,6 +40,11 @@
   StoreManagerCreator CreateStoreMgr;
   ConstraintManagerCreator CreateConstraintMgr;
 
+  /// \brief Provide function definitions in other translation units. This is
+  /// NULL if we don't have multiple translation units. AnalysisManager does
+  /// not own the Indexer.
+  idx::Indexer *Idxer;
+
   enum AnalysisScope { ScopeTU, ScopeDecl } AScope;
 
   // The maximum number of exploded nodes the analyzer will generate.
@@ -62,13 +72,14 @@
   AnalysisManager(ASTContext &ctx, Diagnostic &diags, 
                   const LangOptions &lang, PathDiagnosticClient *pd,
                   StoreManagerCreator storemgr,
-                  ConstraintManagerCreator constraintmgr, unsigned maxnodes,
-                  unsigned maxloop,
+                  ConstraintManagerCreator constraintmgr, 
+                  idx::Indexer *idxer,
+                  unsigned maxnodes, unsigned maxloop,
                   bool vizdot, bool vizubi, bool purge, bool eager, bool trim,
                   bool inlinecall)
 
     : Ctx(ctx), Diags(diags), LangInfo(lang), PD(pd),
-      CreateStoreMgr(storemgr), CreateConstraintMgr(constraintmgr),
+      CreateStoreMgr(storemgr), CreateConstraintMgr(constraintmgr),Idxer(idxer),
       AScope(ScopeDecl), MaxNodes(maxnodes), MaxLoop(maxloop),
       VisualizeEGDot(vizdot), VisualizeEGUbi(vizubi), PurgeDead(purge),
       EagerlyAssume(eager), TrimGraph(trim), InlineCall(inlinecall) {}
@@ -133,6 +144,10 @@
 
   bool shouldInlineCall() const { return InlineCall; }
 
+  bool hasIndexer() const { return Idxer != 0; }
+
+  const AnalysisContext *getAnalysisContextInAnotherTU(const Decl *D);
+
   CFG *getCFG(Decl const *D) {
     return AnaCtxMgr.getContext(D)->getCFG();
   }
@@ -145,9 +160,21 @@
     return AnaCtxMgr.getContext(D)->getParentMap();
   }
 
+  const AnalysisContext *getAnalysisContext(const Decl *D) {
+    return AnaCtxMgr.getContext(D);
+  }
+
+  const StackFrameContext *getStackFrame(AnalysisContext *Ctx,
+                                         LocationContext const *Parent,
+                                         Stmt const *S, const CFGBlock *Blk,
+                                         unsigned Idx) {
+    return LocCtxMgr.getStackFrame(Ctx, Parent, S, Blk, Idx);
+  }
+
   // Get the top level stack frame.
-  const StackFrameContext *getStackFrame(Decl const *D) {
-    return LocCtxMgr.getStackFrame(AnaCtxMgr.getContext(D), 0, 0, 0, 0);
+  const StackFrameContext *getStackFrame(Decl const *D, 
+                                         const idx::TranslationUnit *TU) {
+    return LocCtxMgr.getStackFrame(AnaCtxMgr.getContext(D, TU), 0, 0, 0, 0);
   }
 
   // Get a stack frame with parent.
diff --git a/include/clang/Checker/PathSensitive/GRCoreEngine.h b/include/clang/Checker/PathSensitive/GRCoreEngine.h
index 7f101dc..317558e 100644
--- a/include/clang/Checker/PathSensitive/GRCoreEngine.h
+++ b/include/clang/Checker/PathSensitive/GRCoreEngine.h
@@ -442,8 +442,8 @@
   // The call site.
   const Stmt *CE;
 
-  // The definition of callee.
-  const FunctionDecl *FD;
+  // The AnalysisContext of the callee.
+  const AnalysisContext *CalleeCtx;
 
   // The parent block of the CallExpr.
   const CFGBlock *Block;
@@ -453,9 +453,9 @@
 
 public:
   GRCallEnterNodeBuilder(GRCoreEngine &eng, const ExplodedNode *pred, 
-                         const Stmt *s, const FunctionDecl *fd, 
+                         const Stmt *s, const AnalysisContext *callee, 
                          const CFGBlock *blk, unsigned idx)
-    : Eng(eng), Pred(pred), CE(s), FD(fd), Block(blk), Index(idx) {}
+    : Eng(eng), Pred(pred), CE(s), CalleeCtx(callee), Block(blk), Index(idx) {}
 
   const GRState *getState() const { return Pred->getState(); }
 
@@ -465,7 +465,7 @@
 
   const Stmt *getCallExpr() const { return CE; }
 
-  const FunctionDecl *getCallee() const { return FD; }
+  const AnalysisContext *getCalleeContext() const { return CalleeCtx; }
 
   const CFGBlock *getBlock() const { return Block; }
 
diff --git a/lib/Analysis/AnalysisContext.cpp b/lib/Analysis/AnalysisContext.cpp
index 06d8aec..538d559 100644
--- a/lib/Analysis/AnalysisContext.cpp
+++ b/lib/Analysis/AnalysisContext.cpp
@@ -83,10 +83,11 @@
   return liveness;
 }
 
-AnalysisContext *AnalysisContextManager::getContext(const Decl *D) {
+AnalysisContext *AnalysisContextManager::getContext(const Decl *D,
+                                               const idx::TranslationUnit *TU) {
   AnalysisContext *&AC = Contexts[D];
   if (!AC)
-    AC = new AnalysisContext(D);
+    AC = new AnalysisContext(D, TU);
 
   return AC;
 }
diff --git a/lib/Checker/AnalysisConsumer.cpp b/lib/Checker/AnalysisConsumer.cpp
index 6c7a294..bbeca31 100644
--- a/lib/Checker/AnalysisConsumer.cpp
+++ b/lib/Checker/AnalysisConsumer.cpp
@@ -173,6 +173,7 @@
     Mgr.reset(new AnalysisManager(*Ctx, PP.getDiagnostics(),
                                   PP.getLangOptions(), PD,
                                   CreateStoreMgr, CreateConstraintMgr,
+                                  /* Indexer */ 0, 
                                   Opts.MaxNodes, Opts.MaxLoop,
                                   Opts.VisualizeEGDot, Opts.VisualizeEGUbi,
                                   Opts.PurgeDead, Opts.EagerlyAssume,
@@ -349,7 +350,7 @@
   }
 
   // Execute the worklist algorithm.
-  Eng.ExecuteWorkList(mgr.getStackFrame(D), mgr.getMaxNodes());
+  Eng.ExecuteWorkList(mgr.getStackFrame(D, 0), mgr.getMaxNodes());
 
   // Release the auditor (if any) so that it doesn't monitor the graph
   // created BugReporter.
diff --git a/lib/Checker/AnalysisManager.cpp b/lib/Checker/AnalysisManager.cpp
new file mode 100644
index 0000000..339cdab
--- /dev/null
+++ b/lib/Checker/AnalysisManager.cpp
@@ -0,0 +1,31 @@
+//===-- AnalysisManager.cpp -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Checker/PathSensitive/AnalysisManager.h"
+#include "clang/Index/Entity.h"
+#include "clang/Index/Indexer.h"
+
+using namespace clang;
+
+const AnalysisContext *
+AnalysisManager::getAnalysisContextInAnotherTU(const Decl *D) {
+  idx::Entity Ent = idx::Entity::get(const_cast<Decl *>(D), 
+                                     Idxer->getProgram());
+  FunctionDecl *FuncDef;
+  idx::TranslationUnit *TU;
+  llvm::tie(FuncDef, TU) = Idxer->getDefinitionFor(Ent);
+
+  if (FuncDef == 0)
+    return 0;
+
+  // This AnalysisContext wraps function definition in another translation unit.
+  // But it is still owned by the AnalysisManager associated with the current
+  // translation unit.
+  return AnaCtxMgr.getContext(FuncDef, TU);
+}
diff --git a/lib/Checker/CMakeLists.txt b/lib/Checker/CMakeLists.txt
index 259346a..c3dab22 100644
--- a/lib/Checker/CMakeLists.txt
+++ b/lib/Checker/CMakeLists.txt
@@ -4,6 +4,7 @@
   AdjustedReturnValueChecker.cpp
   AggExprVisitor.cpp
   AnalysisConsumer.cpp
+  AnalysisManager.cpp
   ArrayBoundChecker.cpp
   AttrNonNullChecker.cpp
   BasicConstraintManager.cpp
@@ -15,7 +16,6 @@
   BuiltinFunctionChecker.cpp
   CFRefCount.cpp
   CallAndMessageChecker.cpp
-  CallInliner.cpp
   CastSizeChecker.cpp
   CastToStructChecker.cpp
   CheckDeadStores.cpp
diff --git a/lib/Checker/CallInliner.cpp b/lib/Checker/CallInliner.cpp
index c47e06c..e69de29 100644
--- a/lib/Checker/CallInliner.cpp
+++ b/lib/Checker/CallInliner.cpp
@@ -1,54 +0,0 @@
-//===--- CallInliner.cpp - Transfer function that inlines callee ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-//  This file implements the callee inlining transfer function.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Checker/PathSensitive/CheckerVisitor.h"
-#include "clang/Checker/PathSensitive/GRState.h"
-#include "clang/Checker/Checkers/LocalCheckers.h"
-
-using namespace clang;
-
-namespace {
-class CallInliner : public Checker {
-public:
-  static void *getTag() {
-    static int x;
-    return &x;
-  }
-
-  virtual bool EvalCallExpr(CheckerContext &C, const CallExpr *CE);
-};
-}
-
-void clang::RegisterCallInliner(GRExprEngine &Eng) {
-  Eng.registerCheck(new CallInliner());
-}
-
-bool CallInliner::EvalCallExpr(CheckerContext &C, const CallExpr *CE) {
-  const GRState *state = C.getState();
-  const Expr *Callee = CE->getCallee();
-  SVal L = state->getSVal(Callee);
-  
-  const FunctionDecl *FD = L.getAsFunctionDecl();
-  if (!FD)
-    return false;
-
-  if (!FD->hasBody(FD))
-    return false;
-
-  // Now we have the definition of the callee, create a CallEnter node.
-  CallEnter Loc(CE, FD, C.getPredecessor()->getLocationContext());
-  C.addTransition(state, Loc);
-
-  return true;
-}
-
diff --git a/lib/Checker/GRCXXExprEngine.cpp b/lib/Checker/GRCXXExprEngine.cpp
index 18e112c..5c31331 100644
--- a/lib/Checker/GRCXXExprEngine.cpp
+++ b/lib/Checker/GRCXXExprEngine.cpp
@@ -104,7 +104,7 @@
 
   const CXXThisRegion *ThisR = getCXXThisRegion(E->getConstructor(), SFC);
 
-  CallEnter Loc(E, CD, Pred->getLocationContext());
+  CallEnter Loc(E, SFC->getAnalysisContext(), Pred->getLocationContext());
   for (ExplodedNodeSet::iterator NI = ArgsEvaluated.begin(),
                                  NE = ArgsEvaluated.end(); NI != NE; ++NI) {
     const GRState *state = GetState(*NI);
@@ -157,7 +157,7 @@
                                                     Builder->getBlock(), 
                                                     Builder->getIndex());
   const CXXThisRegion *ThisR = getCXXThisRegion(MD, SFC);
-  CallEnter Loc(MCE, MD, Pred->getLocationContext());
+  CallEnter Loc(MCE, SFC->getAnalysisContext(), Pred->getLocationContext());
   for (ExplodedNodeSet::iterator I = AllArgsEvaluated.begin(),
          E = AllArgsEvaluated.end(); I != E; ++I) {
     // Set up 'this' region.
diff --git a/lib/Checker/GRCoreEngine.cpp b/lib/Checker/GRCoreEngine.cpp
index a816186..df790e3 100644
--- a/lib/Checker/GRCoreEngine.cpp
+++ b/lib/Checker/GRCoreEngine.cpp
@@ -227,8 +227,8 @@
 
 void GRCoreEngine::HandleCallEnter(const CallEnter &L, const CFGBlock *Block,
                                    unsigned Index, ExplodedNode *Pred) {
-  GRCallEnterNodeBuilder Builder(*this, Pred, L.getCallExpr(), L.getCallee(), 
-                                 Block, Index);
+  GRCallEnterNodeBuilder Builder(*this, Pred, L.getCallExpr(), 
+                                 L.getCalleeContext(), Block, Index);
   ProcessCallEnter(Builder);
 }
 
@@ -692,6 +692,12 @@
 
 void GRCallEnterNodeBuilder::GenerateNode(const GRState *state,
                                           const LocationContext *LocCtx) {
+  // Check if the callee is in the same translation unit.
+  if (CalleeCtx->getTranslationUnit() != 
+      Pred->getLocationContext()->getTranslationUnit()) {
+    assert(0 && "to be implemented");
+  }
+
   // Get the callee entry block.
   const CFGBlock *Entry = &(LocCtx->getCFG()->getEntry());
   assert(Entry->empty());
diff --git a/lib/Checker/GRExprEngine.cpp b/lib/Checker/GRExprEngine.cpp
index 26b5801..ce7b9d8 100644
--- a/lib/Checker/GRExprEngine.cpp
+++ b/lib/Checker/GRExprEngine.cpp
@@ -1441,12 +1441,12 @@
 }
 
 void GRExprEngine::ProcessCallEnter(GRCallEnterNodeBuilder &B) {
-  const FunctionDecl *FD = B.getCallee();
-  const StackFrameContext *LocCtx = AMgr.getStackFrame(FD, 
-                                                       B.getLocationContext(),
-                                                       B.getCallExpr(),
-                                                       B.getBlock(),
-                                                       B.getIndex());
+  const StackFrameContext *LocCtx 
+    = AMgr.getStackFrame(const_cast<AnalysisContext *>(B.getCalleeContext()),
+                         B.getLocationContext(),
+                         B.getCallExpr(),
+                         B.getBlock(),
+                         B.getIndex());
 
   const GRState *state = B.getState();
   state = getStoreManager().EnterStackFrame(state, LocCtx);
@@ -1886,16 +1886,29 @@
   if (!FD)
     return false;
 
-  if (!FD->hasBody(FD))
-    return false;
+  // Check if the function definition is in the same translation unit.
+  if (FD->hasBody(FD)) {
+    // Now we have the definition of the callee, create a CallEnter node.
+    CallEnter Loc(CE, AMgr.getAnalysisContext(FD), Pred->getLocationContext());
 
-  // Now we have the definition of the callee, create a CallEnter node.
-  CallEnter Loc(CE, FD, Pred->getLocationContext());
-
-  ExplodedNode *N = Builder->generateNode(Loc, state, Pred);
-  if (N)
+    ExplodedNode *N = Builder->generateNode(Loc, state, Pred);
     Dst.Add(N);
-  return true;
+    return true;
+  }
+
+  // Check if we can find the function definition in other translation units.
+  if (AMgr.hasIndexer()) {
+    const AnalysisContext *C = AMgr.getAnalysisContextInAnotherTU(FD);
+    if (C == 0)
+      return false;
+
+    CallEnter Loc(CE, C, Pred->getLocationContext());
+    ExplodedNode *N = Builder->generateNode(Loc, state, Pred);
+    Dst.Add(N);
+    return true;
+  }
+
+  return false;
 }
 
 void GRExprEngine::VisitCall(CallExpr* CE, ExplodedNode* Pred,
diff --git a/tools/driver/Makefile b/tools/driver/Makefile
index b8c91e8..260f53f 100644
--- a/tools/driver/Makefile
+++ b/tools/driver/Makefile
@@ -28,8 +28,8 @@
 LINK_COMPONENTS := $(TARGETS_TO_BUILD) asmparser bitreader bitwriter codegen \
                    ipo selectiondag
 USEDLIBS = clangFrontend.a clangDriver.a clangCodeGen.a clangSema.a \
-           clangChecker.a clangAnalysis.a clangRewrite.a  clangAST.a \
-           clangParse.a clangLex.a clangBasic.a
+           clangChecker.a clangAnalysis.a clangIndex.a clangRewrite.a  \
+	   clangAST.a clangParse.a clangLex.a clangBasic.a
 
 include $(CLANG_LEVEL)/Makefile