------- Comment #3 from pinskia at gcc dot gnu dot org 2010-07-09 00:06 -------
(In reply to comment #2)
> Give it a single register, the cost is 6. Give it the rtx (plus (reg 144) (reg
> 143)), the cost is 4. So a single register is more expensive than a plus
> expression, not reasonable.
And that causes forwprop to do what it does; it is a lower total cost according
to the cost function :).
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2010-07-09 00:06:33
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44883
