[PATCH] D141251: Replace un-demanded values with undef in BDCE.

[Owen Anderson via Phabricator via llvm-commits]

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Unit test changes spot-verified with alive2. As expected, the
transformation is NOT valid with poison.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D141251

Files:
  llvm/lib/Transforms/Scalar/BDCE.cpp
  llvm/test/Transforms/BDCE/dead-uses.ll
  llvm/test/Transforms/BDCE/intrinsics.ll
  llvm/test/Transforms/BDCE/invalidate-assumptions.ll
  llvm/test/Transforms/BDCE/vectors-inseltpoison.ll
  llvm/test/Transforms/BDCE/vectors.ll

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