[PATCH] D29121: [Docs] Add LangRef documention for freeze instruction

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> we want freeze to be fully agnostic, it should not care *at all* what the type is, right?

Well, it has to be some value which actually has bits that can be frozen.  So integers, floats, pointers, vectors, arrays, and structs.  Maybe worth listing out explicitly.

For pointers, we should probably mention the aliasing rules explicitly.  It should be similar to null: the result can't be dereferenced.  (See http://llvm.org/docs/LangRef.html#pointer-aliasing-rules .)


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https://reviews.llvm.org/D29121