re PR c++/53503 ([C++0x] unexpected AST of kind ltgt_expr)

gcc/cp
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53503
	* semantics.c (potential_constant_expression_1): Handle LTGT_EXPR.

libstdc++-v3
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53503
	* testsuite/26_numerics/headers/cmath/53503.cc: New.

From-SVN: r187928

gcc/cp/ChangeLog

+2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/53503
+	* semantics.c (potential_constant_expression_1): Handle LTGT_EXPR.
+
 2012-05-26  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/53491

gcc/cp/semantics.c

@@ -8487,6 +8487,7 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
     case UNGT_EXPR:
     case UNGE_EXPR:
     case UNEQ_EXPR:
+    case LTGT_EXPR:
     case RANGE_EXPR:
     case COMPLEX_EXPR:
       want_rval = true;

libstdc++-v3/ChangeLog

+2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/53503
+	* testsuite/26_numerics/headers/cmath/53503.cc: New.
+
 2012-05-22  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/53322

libstdc++-v3/testsuite/26_numerics/headers/cmath/53503.cc

+// { dg-options "-std=gnu++11 -fno-trapping-math" }
+// { dg-do compile }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cmath>