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Re: [trunk] Addition to subreg section of rtl.text.


Paolo Bonzini <bonzini@gnu.org> writes:
>> I think one reason is that allowing zero_extracts of multi-word modes is
>> (like this subreg thing) a little hard to pin down.  What happens when
>> WORDS_BIG_ENDIAN && !BYTES_BIG_ENDIAN
>
> Unless I had my grep wrong, the only such machines to do this are PDP11 
> and ARM with special flags (-mbig-endian -mwords-little-endian) that 
> were "for backward compatibility with older versions of GCC" in 1999 [1].
>
> So, is this special case worth keeping?

Good question.  Unless I'm missing something, PDP11 isn't yet on the
deprecrated list.  Is that right?  If so, I suppose we can't remove
it before 4.5 at the earliest.

Richard


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