re PR c++/55708 (g++ crashes: constexpr function with reference parameters.)

2013-04-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/55708
	* g++.dg/cpp0x/constexpr-55708.C: New.

From-SVN: r198337

gcc/testsuite/ChangeLog

-2013-03-26  Richard Biener  <rguenther@suse.de>
+2013-04-26  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/55708
+	* g++.dg/cpp0x/constexpr-55708.C: New.
+
+2013-04-26  Richard Biener  <rguenther@suse.de>
 
 	* gcc.dg/tree-prof/update-loopch.c: Revert last change.
 	* gcc.dg/graphite/pr33766.c: Fix undefined behavior.

gcc/testsuite/g++.dg/cpp0x/constexpr-55708.C

+// PR c++/55708
+// { dg-do compile { target c++11 } }
+
+template<int N,int NNN>
+struct AA { static constexpr int val = N; };
+
+template<typename A,typename B>
+//constexpr unsigned long long mymax(A a,B b){ // <-- compiles 
+constexpr unsigned long long mymax(A && a,const B& b){
+  return a<b?b:a;
+}
+
+template<char... List>
+constexpr long long operator"" _y() noexcept
+{
+  return AA<1, mymax(1,2)>::val; // <-- crashes gcc
+  // return mymax(1,2);   // <-- compiles
+  // return AA<1,2>::val; // <-- compiles
+}
+
+template<char... List>
+constexpr unsigned long long do_y() noexcept
+{
+  return AA<1, mymax(1,2)>::val; // <-- crashes gcc
+}
+
+int main()
+{
+  return 1_y + do_y();
+}