reload1.c (init_reload): Only initialize reload_obstack during the first call.

	* reload1.c (init_reload): Only initialize reload_obstack
	during the first call.

From-SVN: r195335

gcc/ChangeLog

+2013-01-21  Jakub Jelinek  <jakub@redhat.com>
+
+	* reload1.c (init_reload): Only initialize reload_obstack
+	during the first call.
+
 2013-01-21  Marek Polacek  <polacek@redhat.com>
 
 	* cfgloop.c (verify_loop_structure): Fix up grammar.

gcc/reload1.c

@@ -468,8 +468,11 @@ init_reload (void)
     }
 
   /* Initialize obstack for our rtl allocation.  */
-  gcc_obstack_init (&reload_obstack);
-  reload_startobj = XOBNEWVAR (&reload_obstack, char, 0);
+  if (reload_startobj == NULL)
+    {
+      gcc_obstack_init (&reload_obstack);
+      reload_startobj = XOBNEWVAR (&reload_obstack, char, 0);
+    }
 
   INIT_REG_SET (&spilled_pseudos);
   INIT_REG_SET (&changed_allocation_pseudos);