Re: atomicModifyMutVar#: cas() is not inlined

To keep this thread up-to-date: https://phabricator.haskell.org/D2431 2016-07-27 14:08 GMT+00:00 Alex Biehl : > There already is the CallishMachOp MO_cmpxchg in > https://github.com/ghc/ghc/blob/5d98b8bf249fab9bb0be6c5d4e8ddd4578994abb/compiler/cmm/CmmMachOp.hs#L587 > > All

atomicModifyMutVar#: cas() is not inlined

This is from definition of stg_atomicModifyMutVarzh(): (for threaded runtime) retry: x = StgMutVar_var(mv); StgThunk_payload(z,1) = x; (h) = ccall cas(mv + SIZEOF_StgHeader + OFFSET_StgMutVar_var, x, y); if (h != x) { goto retry; } cas() is defined in