re PR c++/51305 ([C++11][constexpr] noexcept-specifier overconstraints constexpr functions)

/cp
2011-12-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51305
	* semantics.c (massage_constexpr_body): Reorder conditionals, make
	sure a BIND_EXPR embedded in a MUST_NOT_THROW_EXPR is handled.

/testsuite
2011-12-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51305
	* g++.dg/cpp0x/constexpr-noexcept6.C: New.

From-SVN: r182594

gcc/cp/ChangeLog

+2011-12-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/51305
+	* semantics.c (massage_constexpr_body): Reorder conditionals, make
+	sure a BIND_EXPR embedded in a MUST_NOT_THROW_EXPR is handled.
+
 2011-12-20  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/51621

gcc/cp/semantics.c

@@ -5998,12 +5998,12 @@ massage_constexpr_body (tree fun, tree body)
       (DECL_CONTEXT (fun), body);
   else
     {
-      if (TREE_CODE (body) == BIND_EXPR)
-	body = BIND_EXPR_BODY (body);
       if (TREE_CODE (body) == EH_SPEC_BLOCK)
         body = EH_SPEC_STMTS (body);
       if (TREE_CODE (body) == MUST_NOT_THROW_EXPR)
 	body = TREE_OPERAND (body, 0);
+      if (TREE_CODE (body) == BIND_EXPR)
+	body = BIND_EXPR_BODY (body);
       body = constexpr_fn_retval (body);
     }
   return body;

gcc/testsuite/ChangeLog

+2011-12-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/51305
+	* g++.dg/cpp0x/constexpr-noexcept6.C: New.
+
 2011-12-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/51644

gcc/testsuite/g++.dg/cpp0x/constexpr-noexcept6.C

+// PR c++/51305
+// { dg-options -std=c++0x }
+
+constexpr bool ok() noexcept
+{
+  typedef int type;
+  return true;
+}
+
+constexpr auto x = ok();