[X86] combineCarryThroughADD - remove unused peek through of SEXT/AEXT nodes.

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -44717,8 +44717,6 @@ static SDValue combineCarryThroughADD(SDValue EFLAGS, SelectionDAG &DAG) {
       SDValue Carry = EFLAGS.getOperand(0);
       while (Carry.getOpcode() == ISD::TRUNCATE ||
              Carry.getOpcode() == ISD::ZERO_EXTEND ||
-             Carry.getOpcode() == ISD::SIGN_EXTEND ||
-             Carry.getOpcode() == ISD::ANY_EXTEND ||
              (Carry.getOpcode() == ISD::AND &&
               isOneConstant(Carry.getOperand(1))))
         Carry = Carry.getOperand(0);