new-new-ra thoughts

[Eric Botcazou]

> b) Extracting a non-low part subset of a word sized of smaller register.
>   This is poorly supported and probably doesn't work in most places.  It
> wasn't even possible to express this until subregs were changed to use
> byte offsets instead of word offsets.  This probably doesn't occur much
> if at all in practice.

This is supposed to be verboten now, after RTH's series of patches.

-- 
Eric Botcazou