Use simplify_replace_rtx rather than wrap_constant

[Richard Sandiford]

Paolo Bonzini <bonzini@gnu.org> writes:
> On 09/26/2009 04:44 PM, Richard Sandiford wrote:
>> +/* Replace all occurrences of OLD_RTX in X with FN (DATA).  Treat FN as
>> +   copy_rtx if it is null.  Canonicalize and simplify the result.  */
>
> Richard, this is a great patch.  The only objection is, I would pass X 
> to FN too.  This way, if we have to build something out of X we can 
> avoid copying it unconditionally.

OK, I can do that.  I'll wait for Bernd's reply before submitting
an updated patch though.

Richard