Simple regclass cleanup

[Jeffrey A Law]

  In message < 19991215105134.D2247@atrey.karlin.mff.cuni.cz >you write:
  > Hi
  > This kills another LOOP notes consumer and get's register preferencing
  > more into sync with N_REFs counters.
  > 
  > Wed Dec 15 10:37:13 MET 1999  Jan Hubicka  <hubicka@freesoft.cz>
  > 	* regclass.c (loop_depth): Remove
  > 	(scan_one_insn): Do not handle LOOP_NOTE insns.
  > 	(regclass): Go trought basic blocks and set loop_cost
                       ^^^^^^^ through

This is fine.  Please install this patch.

jeff