[PATCH] D107923: [X86] X86DAGToDAGISel::matchBitExtract(): support 'num high bits to clear' pattern

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

That being said, i guess we should restrict this to BMI2 BZHI only:
https://godbolt.org/z/zxhPa8Gdh https://godbolt.org/z/KhWhE1eeE
Let me do that..


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https://reviews.llvm.org/D107923