c++: add fixed testcase [PR85944]

This testcase was incidentally fixed by r16-325 for PR119162.

	PR c++/85944

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/constexpr-temp3.C: New test.

diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-temp3.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-temp3.C
new file mode 100644 (file)
index 0000000..584472c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-temp3.C
@@ -0,0 +1,8 @@
+// PR c++/85944
+// { dg-do compile { target c++11 } }
+
+constexpr bool f(int const & x) {
+    return &x;
+}
+
+constexpr auto x = f(0);