http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55073
--- Comment #8 from Richard Earnshaw <rearnsha at gcc dot gnu.org> 2012-11-30 14:00:21 UTC --- (In reply to comment #7) > Richard, > > I apologize, building at -O0 (and handrolling an assembly routine to do the > same computation) proves me wrong : your values are the correct ones, and -O1 > is also broken. > > The reference values are indeed > [0] = FFFFFFFF > [1] = FFFFFFFF > [2] = FFFCFFFC > [3] = FFFCFFFC > > And I still have no idea why my build of your patch does not produce these > results on my HW. Could you please attach a binary build of the repro case so > that I can test it on my HW? In the meantime I'll keep looking. > > Best Regards, > Eric It sounds pretty obvious, but can you double check that you are picking up the new compiler and not somehow getting an old one. Try building to assembly and checking that the GCC version information is correct.
