diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index c942223..4f7f807 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -3126,6 +3126,11 @@
     // These never have a side-effect.
     return false;
 
+  case ConstantExprClass:
+    // FIXME: Move this into the "return false;" block above.
+    return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
+        Ctx, IncludePossibleEffects);
+
   case CallExprClass:
   case CXXOperatorCallExprClass:
   case CXXMemberCallExprClass: