[all-commits] [llvm/llvm-project] e93d32: [InstCombine] Preserve poison in evaluateInDiffere...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e93d324adb4ff80dcbf0e5b678ed3342350eb2de
      https://github.com/llvm/llvm-project/commit/e93d324adb4ff80dcbf0e5b678ed3342350eb2de
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
    M llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-simplify-image-buffer-stores.ll
    M llvm/test/Transforms/InstCombine/shufflevector-div-rem-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/vec_shuffle-inseltpoison.ll
    M llvm/test/Transforms/LoopVectorize/invariant-store-vectorization-2.ll

  Log Message:
  -----------
  [InstCombine] Preserve poison in evaluateInDifferentElementOrder()

Don't unnecessarily replace poison with undef.


  Commit: 6d91905f9786943139150bf9e2b1f10ba92444d5
      https://github.com/llvm/llvm-project/commit/6d91905f9786943139150bf9e2b1f10ba92444d5
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Analysis/ValueTracking.cpp

  Log Message:
  -----------
  [ValueTracking] Short-circuit on unknown bits in isKnownNonEqual() (NFC)

Don't bother computing known bits for the second operand if we
know nothing about the first.


Compare: https://github.com/llvm/llvm-project/compare/629412938b01...6d91905f9786