[PATCH] D122077: [InstCombine] Fold (ctpop(X) == 1) | (X == 0) into ctpop(X) < 2

[Hirochika Matsumoto via Phabricator via cfe-commits]

hkmatsumoto updated this revision to Diff 416762.
hkmatsumoto added a comment.

Address code reviews

- Fold (icmp ne ctpop(X) 1) & (icmp ne X 0) into (icmp ugt ctpop(X) 1) as well

foldOrOfCtpop folds the aforementioned pattern into (icmp **uge** ctpop(X) 2)
and that is later transformed into (icmp ugt ctpop(X) 1). I think this is fine.

- Add tests for vector type


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122077/new/

https://reviews.llvm.org/D122077

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
  llvm/test/Transforms/InstCombine/icmp-or.ll
  llvm/test/Transforms/InstCombine/ispow2.ll

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