1 files changed, 32 insertions, 0 deletions
diff --git a/test/libcxx/numerics/c.math/constexpr-fns.pass.cpp b/test/libcxx/numerics/c.math/constexpr-fns.pass.cpp
new file mode 100644
index 0000000000000..9123be1f09907
--- /dev/null
+++ b/test/libcxx/numerics/c.math/constexpr-fns.pass.cpp
@@ -0,0 +1,32 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// Check that the overloads of std::__libcpp_{isnan,isinf,isfinite} that take
+// floating-point values are evaluatable from constexpr contexts.
+//
+// These functions need to be constexpr in order to be called from CUDA, see
+// https://reviews.llvm.org/D25403.  They don't actually need to be
+// constexpr-evaluatable, but that's what we check here, since we can't check
+// true constexpr-ness.
+//
+// This fails with gcc because __builtin_isnan and friends, which libcpp_isnan
+// and friends call, are not themselves constexpr-evaluatable.
+//
+// UNSUPPORTED: c++98, c++03
+// XFAIL: gcc
+
+#include <cmath>
+
+static_assert(std::__libcpp_isnan(0.) == false, "");
+static_assert(std::__libcpp_isinf(0.0) == false, "");
+static_assert(std::__libcpp_isfinite(0.0) == true, "");
+
+int main()
+{
+}