[all-commits] [llvm/llvm-project] 525d00: [InstCombine] Fix poison propagation in round up a...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 525d00e5edc4b83105c6ad518926b174f76c3a1c
      https://github.com/llvm/llvm-project/commit/525d00e5edc4b83105c6ad518926b174f76c3a1c
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-04-18 (Thu, 18 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
    M llvm/test/Transforms/InstCombine/integer-round-up-pow2-alignment.ll

  Log Message:
  -----------
  [InstCombine] Fix poison propagation in round up alignment fold

We can't directly use the high bits value if it is more poisonous
due to poison elements in the masks.

This fixes the issue reported in
https://github.com/llvm/llvm-project/pull/88217#issuecomment-2061034941.



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