[all-commits] [llvm/llvm-project] 8a0c5d: [DAG] Replace llvm::isNeutralConstant with Selecti...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8a0c5d3f43b27c8e2895c6106d6b551d626979fd
      https://github.com/llvm/llvm-project/commit/8a0c5d3f43b27c8e2895c6106d6b551d626979fd
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-05-05 (Tue, 05 May 2026)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAG.h
    M llvm/include/llvm/CodeGen/SelectionDAGNodes.h
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp

  Log Message:
  -----------
  [DAG] Replace llvm::isNeutralConstant with SelectionDAG::isIdentityElement (#195827)

Initial step towards generalising this - move to SelectionDAG like other
valuetracker helpers, add DemandedElts/Depth controls, etc.

We can add target node handling when it becomes necessary.

Renamed to "IdentityElement" to match llvm naming conventions.



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