On Sat, 28 Apr 2018, Richard Biener wrote: > On Fri, 27 Apr 2018, Richard Biener wrote: > > > On Fri, 27 Apr 2018, David Edelsohn wrote: > > > > > Hi, Richi > > > > > > This patches causes a boostrap failure on AIX. Everything miscompares. > > > The code itself is the same, but the DWARF debug information contains many > > > differences. > > > > Does AIX use bootstrap-debug by default? I don't see how the patch > > can cause this kind of issue directly but of course it will change > > CH decisions which may expose latent bugs somewhere. > > > > Can you provide more details please, like actual differences? > > I would have expected the dwarf2out.c change to be a more likely > > candidate for such symtoms but I trust that you did properly > > bisect to my patch? > > OK, so the x86-64 -O3 bootstrap failure is not caused by this patch, > reverting it doesn't fix the issue. > > The difference w/ the patch reverted is in debug info, all (indirect) > strings reside at different offsets. If I strip the objects they > compare identical. > > I'm trying reversal of that dwarf2out patch now.
That didn't help. Reverting the bootstrap -f[no-]checking patch did. Richard.
