Cleaning up expand optabs code

[Richard Henderson]

On 03/30/2011 01:53 AM, Richard Sandiford wrote:
> This comes back to the point that we really should know up-front what
> modes op0 and op1 actually have.  (The thing I left as a future clean-up.)
> Until then, the process implemented by yesterday's patch was supposed to be:
> 
>    - work out what mode opN actually has at this point in time
>    - see if the target has specifically asked for a different mode
>    - if so, convert the operand

Ok, I get it.  The patch is ok as-is.


r~