regclass.c (regclass): Break out some code into new function scan_one_insn, and into...

regclass.c (regclass): Break out some code into new function scan_one_insn, and into regclass_init.

        * regclass.c (regclass): Break out some code into new function
        scan_one_insn, and into regclass_init.
        (init_cost): New static variable, moved out of regclass.
        (regclass_init): Initialize it here, not in .
        (scan_one_insn): New static function, broken out of regclass.
        * recog.c (apply_change_group): Break out some code into new
        function insn_invalid_p.
        (insn_invalid_p): New static fn, broken out of apply_change_group.

From-SVN: r23236