shafik added a comment.

In D121161#3368117 <https://reviews.llvm.org/D121161#3368117>, @JDevlieghere 
wrote:

> In D121161#3367806 <https://reviews.llvm.org/D121161#3367806>, @labath wrote:
>
>> The class has a constexpr constructor. I thought that would be enough to 
>> avoid runtime initialization. Is this being flagged by something?
>
> It is getting flagged by -Wglobal-constructor but you're right, it's 
> constexpr and therefore shouldn't. Might be a bug in clang. I'll try to repro 
> with ToT.

I wonder if for `ArrayRef` the copy constructor does not look `constexpr` and 
so if you change it to `constexpr static` if it will be ill-formed, that would 
mean it is not really `constant initialization` and therefore that would make 
it dynamic since it also not static initialization since you are calling a 
constructor.


CHANGES SINCE LAST ACTION
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https://reviews.llvm.org/D121161

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