[clang] [llvm] [SystemZ] Add support for __builtin_setjmp and __builtin_longjmp (PR #116642)

[Ulrich Weigand via cfe-commits]

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@@ -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;
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uweigand wrote:

We probably should have a comment here explaining why this cannot be Legal (since common code would treat Legal as Expand for these opcodes).

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