[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  2005-08-03 15:49 -------
Joern wrote: 
> The target register pressure is easy to calculate, and although 4.1 lacks 
> infrastructure for assessment of the unroll benefit (which 3.4 has), it is 
> certainly easier to add it there in the unroller than in the register 
> allocator. 
 
Could you give some specific examples of assesments that 3.4 can do and 4.1 
can not? 
 
 

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