On 08/20/2011 03:03 PM, H.J. Lu wrote: > On Sat, Aug 20, 2011 at 3:02 PM, H.J. Lu <hjl.to...@gmail.com> wrote: >>> You can do better than this, and avoid the %M %N specifiers. >>> The outputs are truly independent and do not need to be a pair. >>> >> >> Since RA use register pairs for TImode/DImode, should requiring >> TI/DI registers in pairs generate better does? > ^^^^^^ codes. > > Without register pairs, we are generating very strange codes. >
We ought to be making better use of the lower-subregs pass. Representing independent outputs when possible enables that. Admittedly, the i386 port needs more attention to really make this happen properly. But we don't need to make things even worse in the meantime. r~
