PR jit/63854: Fix memory leak of reginfo.c: valid_mode_changes_obstack

gcc/ChangeLog:
	PR jit/63854
	* reginfo.c (finish_subregs_of_mode): Replace obstack_finish with
	obstack_free when cleaning up valid_mode_changes_obstack.

From-SVN: r217792

gcc/ChangeLog

 2014-11-19  David Malcolm  <dmalcolm@redhat.com>
 
 	PR jit/63854
+	* reginfo.c (finish_subregs_of_mode): Replace obstack_finish with
+	obstack_free when cleaning up valid_mode_changes_obstack.
+
+2014-11-19  David Malcolm  <dmalcolm@redhat.com>
+
+	PR jit/63854
 	* opts.c (finalize_options_struct): New.
 	* opts.h (finalize_options_struct): New.
 	* toplev.c (toplev::finalize): Call finalize_options_struct

gcc/reginfo.c

@@ -1343,7 +1343,7 @@ void
 finish_subregs_of_mode (void)
 {
   XDELETEVEC (valid_mode_changes);
-  obstack_finish (&valid_mode_changes_obstack);
+  obstack_free (&valid_mode_changes_obstack, NULL);
 }
 
 /* Free all data attached to the structure.  This isn't a destructor because