re PR c++/20416 (Incorrect lifetime for temporary with static const reference)

        PR c++/20416
        * call.c (initialize_reference): Handle local static reference
        temps properly.

From-SVN: r129020

gcc/cp/ChangeLog

+2007-10-04  Jason Merrill  <jason@redhat.com>
+
+	PR c++/20416
+	* call.c (initialize_reference): Handle local static reference
+	temps properly.
+
 2007-10-03  Jason Merrill  <jason@redhat.com>
 
 	PR c++/32470

gcc/cp/call.c

@@ -6824,7 +6824,11 @@ initialize_reference (tree type, tree expr, tree decl, tree *cleanup)
 	      if (at_function_scope_p ())
 		{
 		  add_decl_expr (var);
-		  *cleanup = cxx_maybe_build_cleanup (var);
+
+		  if (TREE_STATIC (var))
+		    init = add_stmt_to_compound (init, register_dtor_fn (var));
+		  else
+		    *cleanup = cxx_maybe_build_cleanup (var);
 
 		  /* We must be careful to destroy the temporary only
 		     after its initialization has taken place.  If the

gcc/testsuite/g++.dg/init/ref15.C

+// PR c++/20416.  We correctly constructed the temporary S in foo(),
+// but incorrectly destroyed it every time foo() was called.
+// { dg-do run }
+extern "C" void abort (void);
+extern "C" void _exit (int);
+
+int c, exiting;
+struct S {
+  S() { ++c; }
+  S(const S &) { ++c; }
+  ~S()
+  {
+    if (!exiting) abort ();
+    _exit (0);
+  }
+};
+void
+foo (void)
+{
+  static const S &s = S();
+}
+int main ()
+{
+  if (c != 0)
+    abort ();
+  foo ();
+  foo ();
+  if (c != 1)
+    abort ();
+  exiting = 1;
+  return 1;
+}