mclow.lists added a comment.

In http://reviews.llvm.org/D11948#221991, @joerg wrote:

> No, it doesn't. It tells the compiler that it is free to make such 
> assumptions.


Again, I disagree. The compiler already knows it is free to make such 
assumptions.
(LLVM has an entire optimizer pass devoted to `memcpy` and friends)


http://reviews.llvm.org/D11948



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