[PATCH] D117480: [IR] Extend llvm.vector.reduce.fadd

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

In D117480#3248421 <https://reviews.llvm.org/D117480#3248421>, @nikic wrote:

> I don't get this change. We already use reassoc FMF to allow a non-ordered reduction, what's the purpose of the new flag?
>
> This also needs a LangRef update.

`reassoc` implies 'any order', but in some cases it is desirable to specify a specific order, e.g. for the vector reduction builtin provided by Clang.


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https://reviews.llvm.org/D117480