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Re: Optimization of conditional access to globals: thread-unsafe?


Ian Lance Taylor wrote:
It appears that the draft C++0x memory model prohibits speculative
stores.

Therefore I now think we should aim toward prohibiting them
unconditionally.

I agree, or perhaps unless the user specifies a flag like -fthread-unsafe-opts or something.


That memory model is just a draft.

It was voted into the C++ standard working paper at the last meeting. And the C committee has expressed interest in adopting it, or something similar, as well.


Jason


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