[PATCH] D69127: [DAGCombiner] widen zext of popcount based on target support

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

So the assumption here is that the popcnt we choose here is the same performance as any smaller popcnt that LegalizeDAG would pick through promotion. Or near enough that its better than having 2 zexts?


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  https://reviews.llvm.org/D69127/new/

https://reviews.llvm.org/D69127