[PATCH] D83602: [DAGCombiner] Scalarize splats with just one demanded lane

[Thomas Lively via Phabricator via llvm-commits]

tlively added a comment.

Thank you all for the comments! I agree that the opcodes in SelectionDAG::isSplatValue are rather arbitrary, so a more principled approach using a TLI hook might be better. I will take a look at what X86 is doing to see if a simpler solution would work for WebAssembly, too.


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