[llvm] [IR] LangRef: document behavior of double-lifetime.start (PR #184296)

[Nikita Popov via llvm-commits]

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@@ -27734,7 +27721,8 @@ Arguments:
 """"""""""
 
 The argument is either a pointer to an ``alloca`` instruction or a ``poison``
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nikic wrote:

Would it be clearer if the "a pointer to" bit were omitted entirely?

https://github.com/llvm/llvm-project/pull/184296