[RFC] Variable Expansion Optimization

[Zdenek Dvorak]

Hello,

> This patch implements the variable expansion optimization 
> in the unroller as was described in 
> http://gcc.gnu.org/ml/gcc/2004-08/msg00658.html.
> It is missing the check for register pressure which is going to
> be the next step.
> 
> The code contains the patch for splitting induction variables 
> in unroller because it is not in mainline yet.
> (http://gcc.gnu.org/ml/gcc-patches/2004-08/msg00397.html)
> I also made some changes to it in 
> order to support the variable expansion optimization.

could you please send a diff against mainline + msg00397.html,
so that your changes are easier to spot?

Zdenek