[PATCH] D151246: [InstCombine] Improve bitreverse optimization

[Austin Chang via Phabricator via llvm-commits]

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This patch utilizes the helper function implemented in D149699 <https://reviews.llvm.org/D149699> and thus folds the following cases:

  bitreverse(logic_op(x, bitreverse(y))) -> logic_op(bitreverse(x), y)
  bitreverse(logic_op(bitreverse(x), y)) -> logic_op(x, bitreverse(y))
  bitreverse(logic_op(bitreverse(x), bitreverse(y))) -> logic_op(x, y) in multiuse case


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151246

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/test/Transforms/InstCombine/bitreverse.ll

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