[all-commits] [llvm/llvm-project] 667942: Check if getNode folded to undef instead

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/dag-fix-scalarize-bin-op-of-splats-overdefining-one-undef-operand
  Home:   https://github.com/llvm/llvm-project
  Commit: 667942923f57d80619f4416d4131a7785f5da4e1
      https://github.com/llvm/llvm-project/commit/667942923f57d80619f4416d4131a7785f5da4e1
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-01-15 (Wed, 15 Jan 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  Check if getNode folded to undef instead


  Commit: 0fd42cfc29f65bf7bc5cfda0f1c1e0ececc69825
      https://github.com/llvm/llvm-project/commit/0fd42cfc29f65bf7bc5cfda0f1c1e0ececc69825
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-01-15 (Wed, 15 Jan 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  Don't bother counting the undefs

It folds to undef or a constant and seems to have the best result
anyway rather than overdefining by splatting the variable value.


Compare: https://github.com/llvm/llvm-project/compare/673b88fbbe88...0fd42cfc29f6

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