[llvm] [Xtensa] Implement lowering SELECT_CC, SETCC. (PR #97017)

[Sergei Barannikov via llvm-commits]

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@@ -514,6 +517,22 @@ XtensaTargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv,
   return DAG.getNode(XtensaISD::RET, DL, MVT::Other, RetOps);
 }
 
+SDValue XtensaTargetLowering::LowerSELECT_CC(SDValue Op,
+                                             SelectionDAG &DAG) const {
+  SDLoc DL(Op);
+  EVT Ty = Op.getOperand(0).getValueType();
+  SDValue LHS = Op.getOperand(0);
+  SDValue RHS = Op.getOperand(1);
+  SDValue TrueValue = Op.getOperand(2);
+  SDValue FalseValue = Op.getOperand(3);
+  ISD::CondCode CC = cast<CondCodeSDNode>(Op->getOperand(4))->get();
+  SDValue TargetCC = DAG.getConstant(CC, DL, MVT::i32);
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s-barannikov wrote:

Condition code should be converted to target opcode here rather than in emitSelectCC.


https://github.com/llvm/llvm-project/pull/97017