Initial implementation of __atomic_* (everything except __atomic_is_lock_free).

llvm-svn: 141632
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index 2b93250..d4ac722 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -2255,6 +2255,7 @@
   case Expr::CXXNoexceptExprClass:
   case Expr::CUDAKernelCallExprClass:
   case Expr::AsTypeExprClass:
+  case Expr::AtomicExprClass:
   {
     // As bad as this diagnostic is, it's better than crashing.
     DiagnosticsEngine &Diags = Context.getDiags();