re PR c++/63996 (Infinite loop in invalid C++14 constexpr fn)

	PR c++/63996
	* g++.dg/cpp1y/pr63996.C: New file.

From-SVN: r218683

gcc/testsuite/ChangeLog

+2014-12-12  Kai Tietz  <ktietz@redhat.com>
+
+	PR c++/63996
+	* g++.dg/cpp1y/pr63996.C: New file.
+
 2014-12-12  Richard Sandiford  <richard.sandiford@arm.com>
 	    Joseph Myers  <joseph@codesourcery.com>
 

gcc/testsuite/g++.dg/cpp1y/pr63996.C

+// { dg-do compile { target c++14 } }
+
+constexpr int
+foo (int i)
+{
+  int a[i] = { };
+}
+
+constexpr int j = foo (1); // { dg-error "is not a constant expression" }
+