[llvm] Eliminating li of 0 into arg registers of unused arguments (PR #122741)

[Hubert Tong via llvm-commits]

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@@ -977,6 +977,18 @@ void SelectionDAGLegalize::LegalizeOp(SDNode *Node) {
   TargetLowering::LegalizeAction Action = TargetLowering::Legal;
   bool SimpleFinishLegalizing = true;
   switch (Node->getOpcode()) {
+  // FixMe: If the node represents a poison value, replace it with an undef
+  // value.
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hubert-reinterpretcast wrote:

Can you explain what is to be fixed here? The text seems to explain what the code is doing (not what it should do differently).

https://github.com/llvm/llvm-project/pull/122741