[PATCH] D89952: [SelectionDAG][X86] Fine tune CTPOP optimizations

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

@spatel Somewhat related question if InstCombine canonicalizes (x && (x & x-1) ==0) to ctpop x == 1. Does that mean if ctpop isn't legal, the vectorization cost model will return a high cost for the ctpop part?


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https://reviews.llvm.org/D89952