test: Mark 316 tests as XFAIL to rename to xfail.pass.cpp.

test/language.support/support.exception/uncaught/uncaught_exception.xfail.pass.cpp

@@ -0,0 +1,45 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 uncaught_exception
+
+#include <exception>
+#include <cassert>
+
+struct A
+{
+    ~A()
+    {
+        assert(std::uncaught_exception());
+    }
+};
+
+struct B
+{
+	B()
+	{
+		// http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#475
+        assert(!std::uncaught_exception());
+	}
+};
+
+int main()
+{
+    try
+    {
+        A a;
+        assert(!std::uncaught_exception());
+        throw B();
+    }
+    catch (...)
+    {
+        assert(!std::uncaught_exception());
+    }
+    assert(!std::uncaught_exception());
+}