[llvm] r243996 - Avoid passing nullptr to std::equal.

[Marshall Clow via llvm-commits]

On Tue, Aug 11, 2015 at 2:15 PM, Yaron Keren via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> I'm not sure how std::equal of two nullptrs should be, is this documented
> or UB?
>
>
Well, if you did this:
  std::equal(nullptr, nullptr, nullptr), you should get true.

[nullptr,nullptr) is a valid, empty range.
And an empty range is equal to another empty range.

-- Marshall
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