[PATCH] D108411: [X86][TLI] SimplifyDemandedVectorEltsForTargetNode(): don't break apart broadcasts from which not just the 0'th elt is demanded

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

Something that I've been wondering about is whether SelectionDAG::isSplatValue should be moved to TLI to make it possible to peek through target opcodes as well to help identify more splats/broadcasts - have you noticed anything that might benefit?


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  https://reviews.llvm.org/D108411/new/

https://reviews.llvm.org/D108411