http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48390
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-03-31 16:15:56 UTC --- For the C case: If "ptr" is also "restrict", the "*a = 1" is optimized away. Ditto for Fortran, if "ptr" is not a POINTER but a normal variable. In case of Fortran, the a/b/c cannot alias with ptr as none of has the TARGET attribute. I would expect the same for C99 as a/b/c are "restrict" but maybe I am wrong about the C99 semantics.
