This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

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



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?

Paolo

[1] http://www.ecos.sourceware.org/ecos/docs-1.2.1/ref/gnupro-ref/arm/index.html


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]