1 files changed, 48 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/experimental/numeric/92978.cc b/libstdc++-v3/testsuite/experimental/numeric/92978.cc
new file mode 100644
index 0000000..8408fd4
--- /dev/null
+++ b/libstdc++-v3/testsuite/experimental/numeric/92978.cc
@@ -0,0 +1,48 @@
+// Copyright (C) 2020 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-do compile { target c++14 } }
+
+#include <experimental/numeric>
+#include <limits.h>
+
+void
+test01()
+{
+  // PR libstdc++/92978
+  static_assert( std::experimental::gcd(-120, 10U) == 10,
+      "mixed signed/unsigned" );
+  static_assert( std::experimental::gcd(120U, -10) == 10,
+      "mixed signed/unsigned" );
+
+  static_assert( std::lcm(-42, 21U) == 42U );
+}
+
+void
+test02()
+{
+  static_assert( std::experimental::gcd(INT_MIN, 0LL) == 1LL+INT_MAX,
+      "|INT_MIN| should not be undefined as long as it fits in the result" );
+  static_assert( std::experimental::gcd(0LL, INT_MIN) == 1LL+INT_MAX,
+      "|INT_MIN| should not be undefined" );
+  static_assert( std::experimental::gcd(INT_MIN, 0LL + INT_MIN) == 1LL + INT_MAX,
+      "|INT_MIN| should not be undefined" );
+  static_assert( std::experimental::gcd(INT_MIN, 1LL + INT_MAX) == 1LL + INT_MAX,
+      "|INT_MIN| should not be undefined" );
+  static_assert( std::experimental::gcd(SHRT_MIN, 1U + SHRT_MAX) == 1U + SHRT_MAX,
+      "|SHRT_MIN| should not be undefined" );
+}