[Bug target/59305] [4.9 Regression] gcc.dg/atomic/c11-atomic-exec-5.c fails with WARNING: program timed out on x86_64-apple-darwin13

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59305

--- Comment #10 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #9)
> I see the same issue on some Solaris 10/SPARC systems on UltraSPARC T2:

do you use the default mutex-based implementation for lib atomic?
(I suspect that this is where the darwin slowness originates)

if I configure --with-cpu=core2 (which allows 16b exchanges) the time drops
from ~50m => 5m with the complex double tests dominating as you have.