[llvm] [Xtensa] Lowering FRAMEADDR/RETURNADDR operations. (PR #107363)

[Andrei Safronov via llvm-commits]

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@@ -594,6 +594,27 @@ SDValue XtensaTargetLowering::LowerSELECT_CC(SDValue Op,
                      FalseValue, TargetCC);
 }
 
+SDValue XtensaTargetLowering::LowerRETURNADDR(SDValue Op,
+                                              SelectionDAG &DAG) const {
+  // This nodes represent llvm.returnaddress on the DAG.
+  // It takes one operand, the index of the return address to return.
+  // An index of zero corresponds to the current function's return address.
+  // An index of one to the parent's return address, and so on.
+  // Depths > 0 not supported yet!
+  if (Op.getConstantOperandVal(0) > 0)
+    return SDValue();
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andreisfr wrote:

Fixed

https://github.com/llvm/llvm-project/pull/107363