[PATCH] Introduce abi_word_mode

[Richard Kenner]

> I think it's only superficially valuable.  I think that when you
> really try to write code that uses it, you find that it is actually
> not very helpful.  The type of exact width BITS_PER_WORD has very
> little meaning or use.  

The case that comes to mind is writing an array that represents a register
save area.  In that case, word_mode is precisely what you want.