[patch] Fix part of PR43430: use types_compatible_p instead of pointer compare

[Richard Guenther]

On Mon, 29 Mar 2010, Sebastian Pop wrote:

> Hi,
> 
> the attached patch replaces with types_compatible_p all the places
> in the vectorizer that were comparing types by pointer equality.
> I will bootstrap and test this patch.  Ok for 4.6, or should this
> cleanup go into 4.5?

The patch is ok for 4.5 if it passes bootstrap & regtest.

Thanks,
Richard.