majnemer added inline comments.

> mstorsjo wrote in ms-volatile-arm.c:2
> Well, originally, the point was to clarify that these volatile stores end up 
> without atomic semantics, regardless of whether -volatile:ms has been 
> specified. The original version of this patch (with an inline implementation 
> in intrin.h, just using a normal volatile pointer) wouldn't pass this test, 
> but would pass if I remove this option. But if you prefer, I can leave it out.

Makes sense.

https://reviews.llvm.org/D24986



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