http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-05-22 10:01:11 UTC --- What GCC did was wrong. But your testcase is clearly invalid as per OpenMP 3.1, 1.4.1: "Similarly, if at least one thread reads from a memory unit and at least one thread writes without synchronization to that same memory unit, including cases due to atomicity considerations as described above, then a data race occurs. If a data race occurs then the result of the program is unspecified."
