Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/language.support/support.exception/bad.exception/bad_exception.pass.cpp

@@ -0,0 +1,27 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// test bad_exception
+
+#include <exception>
+#include <type_traits>
+#include <cassert>
+
+int main()
+{
+    static_assert((std::is_base_of<std::exception, std::bad_exception>::value),
+                 "std::is_base_of<std::exception, std::bad_exception>::value");
+    static_assert(std::is_polymorphic<std::bad_exception>::value,
+                 "std::is_polymorphic<std::bad_exception>::value");
+    std::bad_exception b;
+    std::bad_exception b2 = b;
+    b2 = b;
+    const char* w = b2.what();
+    assert(w);
+}