-fno-tree-cselim not working?

[Andrew Haley]

Richard Guenther writes:
 > >
 > > This is legal POSIX threads code: counter is not accessed when we do
 > > not hold the mutex.  According to POSIX we do not have to declare
 > > volatile memory that we only access when we hold a mutex.
 > 
 > I hope we're not trying to support such w/o volatile counter.

I think we have to: not just for POSIX, but for the Linux kernel too.

 > Whatever POSIX says, this would pessimize generic code too much.

We don't have to do it for non-threaded code.

Andrew.