[llvm] [SelectionDAG] Emit `AssertZext` for function argument range attributes (PR #196786)

[Iris Shi via llvm-commits]

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@@ -12198,6 +12201,8 @@ void SelectionDAGISel::LowerArguments(const Function &F) {
           OutVal = DAG.getNode(ISD::AssertNoFPClass, dl, OutVal.getValueType(),
                                OutVal, SDNoFPClass);
         }
+        if (NumValues == 1 && VT.isInteger() && !isa<LoadSDNode>(OutVal))
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el-ev wrote:

I'm actually not as familiar with this area... Should we keep the guard or remove it?

https://github.com/llvm/llvm-project/pull/196786