[commit: ghc] master: Document some optimisations, rearrange order to be more logical (#5801) (d8a3063)

[Simon Marlow]

On 23/03/2012 19:33, David Terei wrote:
> Repository : ssh://darcs.haskell.org//srv/darcs/ghc
>
> On branch  : master
>
> http://hackage.haskell.org/trac/ghc/changeset/d8a30633a60ee9f1e8cf6ffe48bbd672331f9096
>
>> ---------------------------------------------------------------
>
> commit d8a30633a60ee9f1e8cf6ffe48bbd672331f9096
> Author: David Terei<davidterei at gmail.com>
> Date:   Fri Mar 23 11:30:05 2012 -0700
>
>      Document some optimisations, rearrange order to be more logical (#5801)

Just wondering: why is -fregs-liveness an option?  Are there cases where 
you would not want it?

Cheers,
	Simon