* integrate.c (get_label_from_map): New function.
(expand_inline_function): Use it. Initialize the label_map to
NULL_RTX instead of gen_label_rtx.
(copy_rtx_and_substitute): Use get_label_from_map.
* integrate.h (get_label_from_map): New function.
(set_label_from_map): New macro.
* unroll.c (unroll_loop): Use them.
(copy_loop_body): Ditto.