[all-commits] [llvm/llvm-project] ac4f3f: [SDAG] Clarify behavior of scalable demanded/undef...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac4f3fff8c85f30782391d4500938ca1ec62d3d9
      https://github.com/llvm/llvm-project/commit/ac4f3fff8c85f30782391d4500938ca1ec62d3d9
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2022-10-11 (Tue, 11 Oct 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/unittests/CodeGen/AArch64SelectionDAGTest.cpp

  Log Message:
  -----------
  [SDAG] Clarify behavior of scalable demanded/undef elts in isSplatValue [nfc]

Update comment, and add an assertion to check property expected by sole (non-test) caller.  Remove tests which appear to have been copied from fixed vector tests, and whose demanded bits don't correspond to the way this interface is otherwise used.