more analysis on update_flow_info() crashes on sparc/rs6k

[Jeffrey A Law]

  In message < 199810191327.GAA01771@dm.cobaltmicro.com >you write:
  > Jeff, consider the code you removed here in update_flow_info() in both
  > instruction scheduler implementations the other day, both of which
  > looked something like:
  > 
  > 	if (insn == first)
  > 	  {
  > 	    if (reload_completed && this_is_reg_dead_note)
  >               {
  > 	        forget_the_note();
  >                 break;
  >               }
  > 	    abort();
  > 	  }
  > 
  > And as I said my splits only run after reload.
  > 
  > This is why it always worked before, it isn't rocket science :-)
Sure isn't rocket science.  The comment in that sched.c code is rather
misleading.  For some reason it didn't trigger that I'd just changed that
code as part of the post-reload flow patch.

I'll bring it back with a better comment. :-)

jeff