[M68k] Fix build after splitting SDNode::use_iterator.

Author: topperc

llvm/lib/Target/M68k/M68kISelLowering.cpp

@@ -1848,12 +1848,12 @@ static SDValue LowerTruncateToBTST(SDValue Op, ISD::CondCode CC,
 static bool hasNonFlagsUse(SDValue Op) {
   for (SDNode::use_iterator UI = Op->use_begin(), UE = Op->use_end(); UI != UE;
        ++UI) {
-    SDNode *User = *UI;
+    SDNode *User = UI->getUser();
     unsigned UOpNo = UI.getOperandNo();
     if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
       // Look pass truncate.
       UOpNo = User->use_begin().getOperandNo();
-      User = *User->use_begin();
+      User = User->use_begin()->getUser();
     }
 
     if (User->getOpcode() != ISD::BRCOND && User->getOpcode() != ISD::SETCC &&
@@ -2542,7 +2542,7 @@ SDValue M68kTargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
               (M68k::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
           CCode = M68k::GetOppositeBranchCondition(CCode);
           CC = DAG.getConstant(CCode, DL, MVT::i8);
-          SDNode *User = *Op.getNode()->use_begin();
+          SDNode *User = *Op.getNode()->user_begin();
           // Look for an unconditional branch following this conditional branch.
           // We need this because we need to reverse the successors in order
           // to implement FCMP_OEQ.