patch for update_flow_info REG_WAS_0

[Jeffrey A Law]

  In message < 199802131014.KAA10625@phal.cygnus.co.uk >you write:
  > > One might argue that the note should have been removed when the
  > > insn was deleted.  Can you look into that?
  > 
  > I first looked at the REG_WAS_0 description in rtl.texi.  It appears that
  > is a known fact that the insn might be deleted.  So I presume that that's
  > OK, and we have to deal with it.
Ok.  Thanks.

In that case your patch is the right way to go.  Please install
it into sched.c and haifa-sched.c.

jeff