Add a AggExprVisitor class. It contains lots of boiler
plate code for evaluating expressions of C++ class type.

llvm-svn: 99267
diff --git a/clang/lib/Checker/GRExprEngine.cpp b/clang/lib/Checker/GRExprEngine.cpp
index 0604f8a..553f949 100644
--- a/clang/lib/Checker/GRExprEngine.cpp
+++ b/clang/lib/Checker/GRExprEngine.cpp
@@ -3138,6 +3138,10 @@
 void GRExprEngine::VisitCXXConstructExpr(const CXXConstructExpr *E, SVal Dest,
                                          ExplodedNode *Pred,
                                          ExplodedNodeSet &Dst) {
+  if (E->isElidable()) {
+    VisitAggExpr(E->getArg(0), Dest, Pred, Dst);
+    return;
+  }
 
   const CXXConstructorDecl *CD = E->getConstructor();
   assert(CD);