GCC3 to GCC4 performance regression. Bug?

[Andrew Pinski]

On Mar 24, 2005, at 8:09 PM, James E Wilson wrote:

> I tried it, it doesn't help.  It solves neither the loop invariant code
> motion problem nor the do-loop optimization problem.


The do-loop optimization which 3.3/3.4 was doing was invalid (see the 
bug
referenced below).
I filed it under PR 19210 and was told we should suspended it as
there was no way to tell if the loop was finite.

-- Pinski