thakis added a comment.

In https://reviews.llvm.org/D28543#671953, @hfinkel wrote:

> What's the motivation for this? The placement of a local volatile variable is 
> still under the compiler's direction, and unless the address escapes, we 
> still assume we can reason about its aliasing (and, thus, whether or not it 
> is initialized).


volatile means that the value can change at any time, which might initialize 
the variable, no?


https://reviews.llvm.org/D28543



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