[DAG] expandABS - add missing FREEZE in abs(x) -> smax(x,sub(0,x)) expansion

Noticed while working on #94601

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

@@ -9159,6 +9159,7 @@ SDValue TargetLowering::expandABS(SDNode *N, SelectionDAG &DAG,
   if (!IsNegative && isOperationLegal(ISD::SUB, VT) &&
       isOperationLegal(ISD::SMAX, VT)) {
     SDValue Zero = DAG.getConstant(0, dl, VT);
+    Op = DAG.getFreeze(Op);
     return DAG.getNode(ISD::SMAX, dl, VT, Op,
                        DAG.getNode(ISD::SUB, dl, VT, Zero, Op));
   }
@@ -9175,8 +9176,8 @@ SDValue TargetLowering::expandABS(SDNode *N, SelectionDAG &DAG,
   // 0 - abs(x) -> smin(x, sub(0,x))
   if (IsNegative && isOperationLegal(ISD::SUB, VT) &&
       isOperationLegal(ISD::SMIN, VT)) {
-    Op = DAG.getFreeze(Op);
     SDValue Zero = DAG.getConstant(0, dl, VT);
+    Op = DAG.getFreeze(Op);
     return DAG.getNode(ISD::SMIN, dl, VT, Op,
                        DAG.getNode(ISD::SUB, dl, VT, Zero, Op));
   }