[PATCH] Reduce cost of Athlon multiplication sequences

Richard Henderson rth@redhat.com
Fri Jan 6 22:25:00 GMT 2006


On Fri, Jan 06, 2006 at 08:41:07AM +0100, Jan Hubicka wrote:
>   1) Remove TARGET_DECOMPOSE_LEA and leave us with some fixed cost for
>   LEA (probably 2).  At the moment we never consider rtx_cost for other
>   leas than add+shift/add+add sequences so this would do resonable job.
>   (on P4 add+shift is more expensive than add+add)

Given that we don't really do too much else tuning for p4, I suspect
that we can't measure the difference.  Let's just remove it.



r~



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