[llvm] [CodeGen] Fix EVT::changeVectorElementType assertion on simple-to-extended fallback (PR #173413)

[Craig Topper via llvm-commits]

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@@ -11917,7 +11919,9 @@ SDValue TargetLowering::expandFP_ROUND(SDNode *Node, SelectionDAG &DAG) const {
     Op = DAG.getNode(ISD::SRL, dl, I32, Op,
                      DAG.getShiftAmountConstant(16, I32, dl));
     Op = DAG.getNode(ISD::BITCAST, dl, I32, Op);
-    EVT I16 = I32.isVector() ? I32.changeVectorElementType(MVT::i16) : MVT::i16;
+    EVT I16 = I32.isVector()
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topperc wrote:

Can we use `changeElementType` here?

https://github.com/llvm/llvm-project/pull/173413