On Mon, Nov 11, 2013 at 12:39 PM, Jakub Jelinek <ja...@redhat.com> wrote: > On Mon, Nov 11, 2013 at 12:29:29PM +0100, Richard Biener wrote: >> On Fri, Nov 8, 2013 at 6:51 PM, Hendrik Greving >> <hendrik.greving.in...@gmail.com> wrote: >> > That didn't do it. What was the rationale w.r.t. to the relation >> > between the vectorized sequenced and/or the alignment (I think these >> > things are actually 2 separate things..) and the common block?! >> >> We cannot adjust the alignment of a common block as we don't know >> which common block the linker will pick in the end. We can (and do) >> adjust the alignment of global variables though. And C++ defaults >> to -fno-common. >> >> In general when asking optimization questions it helps to provide >> a testcase that can be compiled - otherwise you just provoke >> random guesses (like mine) ;) > > Well, we had the discussion about turning -fno-common by default for C as > well, I think it wouldn't hurt and let people use -fcommon if they need it.
Yeah, so ... shall we just do it? Maybe just for a selected set of targets (based on OS?)? Richard. > Jakub
