[llvm] DAG: Fix chain mismanagement in SoftenFloatRes_FP_EXTEND (PR #74406)

[Simon Pilgrim via llvm-commits]

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@@ -2181,6 +2186,20 @@ static ISD::NodeType GetPromotionOpcode(EVT OpVT, EVT RetVT) {
   report_fatal_error("Attempt at an invalid promotion-related conversion");
 }
 
+static ISD::NodeType GetPromotionOpcodeStrict(EVT OpVT, EVT RetVT) {
+  if (OpVT == MVT::f16) {
+    return ISD::STRICT_FP16_TO_FP;
+  } else if (RetVT == MVT::f16) {
+    return ISD::STRICT_FP_TO_FP16;
+  } else if (OpVT == MVT::bf16) {
+    // return ISD::STRICT_BF16_TO_FP;
+  } else if (RetVT == MVT::bf16) {
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RKSimon wrote:

(style) Break if-else chain

https://github.com/llvm/llvm-project/pull/74406