re PR c++/67625 (some constexpr expressions rejected as enumerator value)

2017-10-10  Jakub Jelinek  <jakub@redhat.com>

	PR c++/67625
	* g++.dg/cpp0x/pr67625.C: New test.

From-SVN: r253617

gcc/testsuite/ChangeLog

 2017-10-10  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/67625
+	* g++.dg/cpp0x/pr67625.C: New test.
+
 	PR middle-end/70887
 	* g++.dg/cpp0x/pr70887.C: New test.
 

gcc/testsuite/g++.dg/cpp0x/pr67625.C

+// PR c++/67625
+// { dg-do compile { target c++11 } }
+
+constexpr unsigned short
+bswap16 (unsigned short x)
+{
+  return __builtin_bswap16 (x);
+}
+constexpr int a = bswap16 (1);
+enum { b = a };
+enum { c = __builtin_bswap16 (1) };
+enum { d = bswap16 (1) };