[Bug c/15239] suboptimal mult-by-const expansion cost limit

[jsm at polyomino dot org dot uk]

------- Additional Comments From jsm at polyomino dot org dot uk  2004-05-01 00:07 -------
Subject: Re:  New: suboptimal mult-by-const expansion cost limit

On Fri, 30 Apr 2004, l_belev at yahoo dot com wrote:

> The problem is that the limiting of the cost with the cost of 12 adds (the 
> second line) is arbitrary and for some architectures (like pentium4) where 

And therefore at least it should be made runtime controllable with
--param, even if the default stays fixed at 12, so that it is easier to
test the effects of varying it (on code size and performance benchmarks).



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15239