Index: include/clang/AST/DeclCXX.h
===================================================================
--- include/clang/AST/DeclCXX.h
+++ include/clang/AST/DeclCXX.h
@@ -2315,6 +2315,9 @@
   CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
                      SourceLocation L, Expr *Init, SourceLocation R);
 
+  /// \return Unique reproducible object identifier.
+  int64_t getID(const ASTContext &Context) const;
+
   /// Determine whether this initializer is initializing a base class.
   bool isBaseInitializer() const {
     return Initializee.is<TypeSourceInfo*>() && !IsDelegating;
Index: lib/AST/DeclBase.cpp
===================================================================
--- lib/AST/DeclBase.cpp
+++ lib/AST/DeclBase.cpp
@@ -955,10 +955,7 @@
 static Decl::Kind getKind(const DeclContext *DC) { return DC->getDeclKind(); }
 
 int64_t Decl::getID() const {
-  Optional<int64_t> Out = getASTContext().getAllocator().identifyObject(this);
-  assert(Out && "Wrong allocator used");
-  assert(*Out % alignof(Decl) == 0 && "Wrong alignment information");
-  return *Out / alignof(Decl);
+  return getASTContext().getAllocator().identifyKnownAlignedObject<Decl>(this);
 }
 
 const FunctionType *Decl::getFunctionType(bool BlocksToo) const {
Index: lib/AST/DeclCXX.cpp
===================================================================
--- lib/AST/DeclCXX.cpp
+++ lib/AST/DeclCXX.cpp
@@ -2246,6 +2246,11 @@
     : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
       IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
 
+int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
+  return Context.getAllocator()
+                .identifyKnownAlignedObject<CXXCtorInitializer>(this);
+}
+
 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
   if (isBaseInitializer())
     return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
Index: lib/AST/Stmt.cpp
===================================================================
--- lib/AST/Stmt.cpp
+++ lib/AST/Stmt.cpp
@@ -303,10 +303,7 @@
 }
 
 int64_t Stmt::getID(const ASTContext &Context) const {
-  Optional<int64_t> Out = Context.getAllocator().identifyObject(this);
-  assert(Out && "Wrong allocator used");
-  assert(*Out % alignof(Stmt) == 0 && "Wrong alignment information");
-  return *Out / alignof(Stmt);
+  return Context.getAllocator().identifyKnownAlignedObject<Stmt>(this);
 }
 
 CompoundStmt::CompoundStmt(ArrayRef<Stmt *> Stmts, SourceLocation LB,
Index: lib/StaticAnalyzer/Core/ExplodedGraph.cpp
===================================================================
--- lib/StaticAnalyzer/Core/ExplodedGraph.cpp
+++ lib/StaticAnalyzer/Core/ExplodedGraph.cpp
@@ -284,10 +284,7 @@
 }
 
 int64_t ExplodedNode::getID(ExplodedGraph *G) const {
-  Optional<int64_t> Out = G->getAllocator().identifyObject(this);
-  assert(Out && "Wrong allocator used");
-  assert(*Out % alignof(ExplodedNode) == 0 && "Wrong alignment information");
-  return *Out / alignof(ExplodedNode);
+  return G->getAllocator().identifyKnownAlignedObject<ExplodedNode>(this);
 }
 
 bool ExplodedNode::isTrivial() const {
Index: lib/StaticAnalyzer/Core/ProgramState.cpp
===================================================================
--- lib/StaticAnalyzer/Core/ProgramState.cpp
+++ lib/StaticAnalyzer/Core/ProgramState.cpp
@@ -70,10 +70,7 @@
 }
 
 int64_t ProgramState::getID() const {
-  Optional<int64_t> Out = getStateManager().Alloc.identifyObject(this);
-  assert(Out && "Wrong allocator used");
-  assert(*Out % alignof(ProgramState) == 0 && "Wrong alignment information");
-  return *Out / alignof(ProgramState);
+  return getStateManager().Alloc.identifyKnownAlignedObject<ProgramState>(this);
 }
 
 ProgramStateManager::ProgramStateManager(ASTContext &Ctx,