Abort in redirect_edge_and_branch on vax at line 866

[law@redhat.com]

> The attached patch should do the trick for you.
> Bootstrapped/regtested i386. OK to install?
> 
> Wed Jan  9 11:23:03 CET 2002  Jan Hubicka  <jh@suse.cz>
> 	* gcse.c (cprop_jump): Delete insn if simplified jump is no-op.
Be VERY VERY careful here.  Deleting the insn is likely to cause all
kinds of problems with the datastructures that gcse.c uses.  That was
the entire point behind deferring deletion of jumps until after gcse.c
was finished.

I would like to see an analysis of the code before this patch is installed.
jeff