Improve unrolled size estimates

[Jan Hubicka]

> On Mon, 11 May 2009, Jan Hubicka wrote:
> 
> > Hi,
> > it turned out that there is some extra testsuite compensation neccesary
> > since in vectorizer testsuite we now tend fully unroll internal loops
> > preventing vectorization.  In some cases unrolling makes sense, in some
> > cases we make code size growth because we account loads and stores to
> > have size of 0 I will fix by followup patch.  Still it seems to make
> 
> Stores have size 0?  They never should ;)

Yes, both load and stores are estimated to size of 0 :)  It was so
because metric was originally intended to only drive inliner and I
conlcuded that most of load/stores will be optimized away later anyway
so it makes sense to only count the real stuff done in the function.

Honza
> 
> Richard.