[Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code

[Daniel Berlin]

steven at gcc dot gnu dot org wrote:
> ------- Comment #4 from steven at gcc dot gnu dot org  2006-06-02 23:19 -------
> Real bug, despite Andrew's usual portion of x86-hate.
> 
> 

It'd be good to know what exactly is going wrong.
Reassociation only touches floating point because someone asked me to
make it touch floating point.

It still shouldn't have *this* much of an affect, my guess is it is
triggering some bad behavior elsewhere.