------- Comment #6 from joakim dot tjernlund at transmode dot se 2010-04-26
15:18 -------
Subject: Re: PowerPC suboptimal "add with carry" optimization
"rguenth at gcc dot gnu dot org" <gcc-bugzi...@gcc.gnu.org> wrote on 2010/04/26
16:43:04:
> > Will that also address the loop optimization? I don't think so.
>
> No.
OK, would be nice if the loop case could be fixed too.
Just noticed this too:
add32carry:
add 3,3,4
subfc 0,4,3
subfe 0,0,0
subfc 0,0,3
mr 3,0
That could have been better even without "add with carry" optimization:
add32carry:
add 3,3,4
subfc 0,4,3
subfe 0,0,0
subfc 3,0,3
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43892
