[DAG] foldABSToABD - rename operand value types. NFC.

Match operand variable naming.

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -10917,15 +10917,15 @@ SDValue DAGCombiner::foldABSToABD(SDNode *N) {
     return SDValue();
   }
 
-  EVT VT1 = Op0.getOperand(0).getValueType();
-  EVT VT2 = Op1.getOperand(0).getValueType();
+  EVT VT0 = Op0.getOperand(0).getValueType();
+  EVT VT1 = Op1.getOperand(0).getValueType();
   unsigned ABDOpcode = (Opc0 == ISD::SIGN_EXTEND) ? ISD::ABDS : ISD::ABDU;
 
   // fold abs(sext(x) - sext(y)) -> zext(abds(x, y))
   // fold abs(zext(x) - zext(y)) -> zext(abdu(x, y))
-  EVT MaxVT = VT1.bitsGT(VT2) ? VT1 : VT2;
-  if ((VT1 == MaxVT || Op0->hasOneUse()) &&
-      (VT2 == MaxVT || Op1->hasOneUse()) && hasOperation(ABDOpcode, MaxVT)) {
+  EVT MaxVT = VT0.bitsGT(VT1) ? VT0 : VT1;
+  if ((VT0 == MaxVT || Op0->hasOneUse()) &&
+      (VT1 == MaxVT || Op1->hasOneUse()) && hasOperation(ABDOpcode, MaxVT)) {
     SDValue ABD = DAG.getNode(ABDOpcode, DL, MaxVT,
                               DAG.getNode(ISD::TRUNCATE, DL, MaxVT, Op0),
                               DAG.getNode(ISD::TRUNCATE, DL, MaxVT, Op1));