[PATCH] D80801: [DAGCombiner] allow more folding of fadd + fmul into fma

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> We are only pulling the trailing addition in with an existing multiply.

The problem here is that it's the "wrong" multiply: you have, essentially `(A*B+D*E)+F`, and you're turning it into `A*B+(D*E+F)`.  I don't think contraction is supposed to cover that.


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https://reviews.llvm.org/D80801