1 files changed, 35 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc b/libstdc++-v3/testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc
new file mode 100644
index 00000000000..b56bc50e1c1
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc
@@ -0,0 +1,35 @@
+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-O1" }
+// { dg-do compile { target c++11 } }
+// { dg-final { scan-assembler-not "__throw_length_error" } }
+// { dg-final { scan-assembler-not "__throw_bad_alloc" } }
+
+#include <bits/c++config.h>
+#undef _GLIBCXX_EXTERN_TEMPLATE
+#include <string>
+
+void
+test01(std::string& target, std::string&& source)
+{
+  // The move assignment operator should be simple enough that the compiler
+  // can see that it never results in a length_error or bad_alloc exception
+  // (which would be turned into std::terminate by the noexcept on the
+  // assignment operator).
+  target = std::move(source);
+}