[Bug rtl-optimization/20969] unrolling does not take target register pressure into account.

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-08-04 13:10 -------
Strength reduction already happens before loop unrolling, but I guess 
there could still be new opportunities after loop unrolling.  Not sure 
how significant that would be. 
 
For the number of loop iterations, the plan was always that loops would 
be preserved down from the tree level, and that the number of iterations 
would be computed there.  This hasn't happened yet, sadly. 
 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20969