+extern rtx clear_storage (rtx, rtx, enum block_op_methods);
+extern rtx clear_storage_hints (rtx, rtx, enum block_op_methods,
+ unsigned int, HOST_WIDE_INT);
+/* The same, but always output an library call. */
+rtx set_storage_via_libcall (rtx, rtx, rtx, bool);
+
+/* Expand a setmem pattern; return true if successful. */
+extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int,
+ unsigned int, HOST_WIDE_INT);