================
@@ -6292,6 +6534,10 @@ SDValue SystemZTargetLowering::LowerOperation(SDValue Op,
     return lowerGET_ROUNDING(Op, DAG);
   case ISD::READCYCLECOUNTER:
     return lowerREADCYCLECOUNTER(Op, DAG);
+  case ISD::EH_SJLJ_SETJMP:
+  case ISD::EH_SJLJ_LONGJMP:
+    return Op;
----------------
uweigand wrote:

This comment doesn't look quite right to me.  I think it should say something 
like:
"These operations are legal on our platform, but we cannot actually set the 
operation action to Legal as common code would treat this as equivalent to 
Expand.  Instead, we the operation action to Custom and just leave them 
unchanged here."

https://github.com/llvm/llvm-project/pull/116642
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