Fix -Wuninitialized regression involving functions invalidating parameters passed by reference.

llvm-svn: 135610
diff --git a/clang/lib/Analysis/UninitializedValues.cpp b/clang/lib/Analysis/UninitializedValues.cpp
index b84b430..67f0f67 100644
--- a/clang/lib/Analysis/UninitializedValues.cpp
+++ b/clang/lib/Analysis/UninitializedValues.cpp
@@ -441,8 +441,10 @@
   // Record the last DeclRefExpr seen.  This is an lvalue computation.
   // We use this value to later detect if a variable "escapes" the analysis.
   if (const VarDecl *vd = dyn_cast<VarDecl>(dr->getDecl()))
-    if (isTrackedVar(vd))
+    if (isTrackedVar(vd)) {
+      ProcessUses();
       lastDR = dr;
+    }
 }
 
 void TransferFunctions::VisitDeclStmt(DeclStmt *ds) {