Removed isConstantSplatVector duplicates.

Author: Dinar Temirbulatov

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -17927,13 +17927,11 @@ static SDValue tryCombineToBSL(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
       } else
         continue;
 
-      if (!ISD::isConstantSplatVectorAllZeros(Sub.getOperand(0).getNode()) &&
-          !ISD::isConstantSplatVectorAllZeros(Sub.getOperand(0).getNode()))
+      if (!ISD::isConstantSplatVectorAllZeros(Sub.getOperand(0).getNode()))
         continue;
 
       // Constant ones is always righthand operand of the Add.
-      if (!ISD::isConstantSplatVectorAllOnes(Add.getOperand(1).getNode()) &&
-          !ISD::isConstantSplatVectorAllOnes(Add.getOperand(1).getNode()))
+      if (!ISD::isConstantSplatVectorAllOnes(Add.getOperand(1).getNode()))
         continue;
 
       if (Sub.getOperand(1) != Add.getOperand(0))