[all-commits] [llvm/llvm-project] cd54c4: [InstCombine] Match poison instead of undef in fol...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cd54c47424456a4dcf8161f3377234cbfa459e88
      https://github.com/llvm/llvm-project/commit/cd54c47424456a4dcf8161f3377234cbfa459e88
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/vec_shuffle-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/vec_shuffle.ll

  Log Message:
  -----------
  [InstCombine] Match poison instead of undef in foldVectorBinop()

Some negative tests turn into positive tests, as the differences
between undef and poison propagation allow additional transforms.