[Bug libgomp/59194] tsan detects race for real variables in an OMP reduction clause

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59194

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And the problem with that is?  Because the arithmetics is based on the value
we've read, it shouldn't be a problem.

That said, during stage3 I'll look at how costly would be to use there
__atomic_load_n with MEMMODEL_RELAXED.