Sharing hard registers

[David S. Miller]

   From: Jan Hubicka <jh@suse.cz>
   Date: Fri, 14 Jun 2002 12:20:33 +0200

      * Each pseudo-register has only a single `reg' object to represent
        it, and therefore only a single machine mode.
   
   Many parts of compiler rely on this fact.

Thanks for clarifying.