[Bug libstdc++/54861] std::atomic_signal_fence(std::memory_order_seq_cst) issues unnecessary mfence

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54861

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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          Component|c++                         |libstdc++
           Severity|normal                      |enhancement