[all-commits] [llvm/llvm-project] e4fa2e: [DAG] isGuaranteedNotToBeUndefOrPoisonForTargetNod...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e4fa2e3562f20106f0fe4a4d09df03a548db4eae
      https://github.com/llvm/llvm-project/commit/e4fa2e3562f20106f0fe4a4d09df03a548db4eae
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

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

  Log Message:
  -----------
  [DAG] isGuaranteedNotToBeUndefOrPoisonForTargetNode - add fallback implementation (#86125)

Allow targets to rely on TargetLowering::isGuaranteedNotToBeUndefOrPoisonForTargetNode to test nodes for canCreateUndefOrPoisonForTargetNode + all arguments are isGuaranteedNotToBeUndefOrPoison.

Targets can still perform this themselves for specific special case nodes (e.g. target shuffles).

Matches the fallback in SelectionDAG::isGuaranteedNotToBeUndefOrPoison



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