[PATCH] Introduce abi_word_mode

[Andrew Pinski]

> > What do you think of my current proposal as outlined in my replies to
> > Richard and Ian?
> 
> Frankly, I think it adds more complexity where we should have less.  I'd 
> rather we move away from this feature entirely than that we introduce 
> abi_word.

If we going to move away from mode(word), then this will help out the
SPU port.  Which right now, the word_mode is TImode but the target is
really a 32bit target (the natural word size is still 32bits)
with 128bit registers and can support the full TImode.   But using TImode
is unnatural and has to be emulated via libcalls and extra instructions.

Thanks,
Andrew Pinski