[Bug target/58490] __sync_bool_compare_and_swap sign bit failure

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58490

--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Can you let me know whether 

http://gcc.gnu.org/ml/gcc-patches/2013-03/msg00553.html

fixes the problem?