[PATCH] D68189: [InstCombine] recognize popcount implemented in hacker's delight.

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

>> Maybe we need to add TargetTransformInfo in InstCombiner to make sure this combination only happens when getPopcntSupport is true.

Atleast on X86 it is not needed, since popcount expander expands intrinsic to exactly this pattern.

https://godbolt.org/z/i-rswr


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  https://reviews.llvm.org/D68189/new/

https://reviews.llvm.org/D68189