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Re: volatile qualifier hurts single-threaded optimized case

Richard Guenther wrote:

There is this bug in the accounting code where we non-atomically update

      // Return this block to our list and update counters and
       // owner id as needed.
       --__bin._M_used[__block->_M_thread_id];

where __block->_M_thread_id does not need to be equal to __thread_id.
But this is unrelated to having volatile or not, as only _M_used pointer
is volatile, not the value we decrement here.

Exactly.

Paolo.

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