[all-commits] [llvm/llvm-project] d1fbdd: [NaryReassociate] Check to avoid introducing poiso...

[Benjamin Kramer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d1fbdde9d400222b6db0e5509392007208ad1018
      https://github.com/llvm/llvm-project/commit/d1fbdde9d400222b6db0e5509392007208ad1018
  Author: Benjamin Kramer <benny.kra at googlemail.com>
  Date:   2024-07-09 (Tue, 09 Jul 2024)

  Changed paths:
    M llvm/lib/Transforms/Scalar/NaryReassociate.cpp
    M llvm/test/Transforms/NaryReassociate/nary-gep.ll

  Log Message:
  -----------
  [NaryReassociate] Check to avoid introducing poison when reusing SCEVs (#98156)

Drop the poison flags if possible or skip the candidate if it's not.
Otherwise we'd introduce poison in places where it previously wasn't,
leading to miscompiles.



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