patch for killing cc0 users

[Richard Henderson]

On Sat, Sep 19, 1998 at 10:04:17PM -0600, Jeffrey A Law wrote:
> However, combine create insns which have a set of CC0 in parallel with
> another operation (search for HAVE_cc0 in combine.c), so I do think
> we do need to check for additional side effects before deleting the
> cc0 setter insn.
> 
> In cases where we can't delete cc0 setter, we might just want to leave
> the cc0 user alone...

This is exactly what the patch does.


r~