HI to SI mode miss conversion on MIPS.

[Jeffrey A Law]

  In message <20000216135630U.machida@sm.sony.co.jp>you write:
  > 2000-02-16  Hiroyuki Machida <machida@sm.sony.co.jp>
  > 
  > 	* combine.c (try_combine): Update reg_nonzero_bits of
  > 	newi2pat before newpat. Because reg_nonzero_bits of
  > 	newi2pat can affect reg_nonzero_bits of newpat.
Thanks.  I have installed this patch into the development sources.
jeff