2 files changed, 9 insertions, 28 deletions

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 16b406c0a5..745a9b6dfc 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -1048,9 +1048,6 @@ private:
   /// NumOperands/NumValues - The number of entries in the Operand/Value list.
   unsigned short NumOperands, NumValues;
   
-  /// UsesSize - The size of the uses list.
-  unsigned UsesSize;
-
   /// Uses - List of uses for this SDNode.
   SDUse *Uses;
 
@@ -1075,9 +1072,11 @@ public:
     return NodeType - ISD::BUILTIN_OP_END;
   }
 
-  size_t use_size() const { return UsesSize; }
+  size_t use_size() const { return std::distance(use_begin(), use_end()); }
   bool use_empty() const { return Uses == NULL; }
-  bool hasOneUse() const { return use_size() == 1; }
+  bool hasOneUse() const {
+    return !use_empty() && next(use_begin()) == use_end();
+  }
 
   /// getNodeId - Return the unique node id.
   ///
@@ -1249,7 +1248,7 @@ protected:
   }
 
   SDNode(unsigned Opc, SDVTList VTs, const SDOperand *Ops, unsigned NumOps)
-    : NodeType(Opc), NodeId(-1), UsesSize(0), Uses(NULL) {
+    : NodeType(Opc), NodeId(-1), Uses(NULL) {
     OperandsNeedDelete = true;
     NumOperands = NumOps;
     OperandList = NumOps ? new SDUse[NumOperands] : 0;
@@ -1258,7 +1257,6 @@ protected:
       OperandList[i] = Ops[i];
       OperandList[i].setUser(this);
       Ops[i].Val->addUse(OperandList[i]);
-      ++Ops[i].Val->UsesSize;
     }
     
     ValueList = VTs.VTs;
@@ -1266,7 +1264,7 @@ protected:
   }
 
   SDNode(unsigned Opc, SDVTList VTs, const SDUse *Ops, unsigned NumOps)
-    : NodeType(Opc), NodeId(-1), UsesSize(0), Uses(NULL) {
+    : NodeType(Opc), NodeId(-1), Uses(NULL) {
     OperandsNeedDelete = true;
     NumOperands = NumOps;
     OperandList = NumOps ? new SDUse[NumOperands] : 0;
@@ -1275,7 +1273,6 @@ protected:
       OperandList[i] = Ops[i];
       OperandList[i].setUser(this);
       Ops[i].getSDOperand().Val->addUse(OperandList[i]);
-      ++Ops[i].getSDOperand().Val->UsesSize;
     }
     
     ValueList = VTs.VTs;
@@ -1283,7 +1280,7 @@ protected:
   }
 
   SDNode(unsigned Opc, SDVTList VTs)
-    : NodeType(Opc), NodeId(-1), UsesSize(0), Uses(NULL) {
+    : NodeType(Opc), NodeId(-1), Uses(NULL) {
     OperandsNeedDelete = false;  // Operands set with InitOperands.
     NumOperands = 0;
     OperandList = 0;
@@ -1298,13 +1295,11 @@ protected:
     assert(OperandList == 0 && "Operands already set!");
     NumOperands = NumOps;
     OperandList = Ops;
-    UsesSize = 0;
     Uses = NULL;
     
     for (unsigned i = 0; i != NumOps; ++i) {
       OperandList[i].setUser(this);
       Ops[i].getVal()->addUse(OperandList[i]);
-      ++Ops[i].getVal()->UsesSize;
     }
   }
 
@@ -1323,14 +1318,12 @@ protected:
   void addUser(unsigned i, SDNode *User) {
     assert(User->OperandList[i].getUser() && "Node without parent");
     addUse(User->OperandList[i]);
-    ++UsesSize;
   }
 
   void removeUser(unsigned i, SDNode *User) {
     assert(User->OperandList[i].getUser() && "Node without parent");
     SDUse &Op = User->OperandList[i];
     Op.removeFromList();
-    --UsesSize;
   }
 };
 
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 0eb9296755..d98f1fa215 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3749,7 +3749,6 @@ void SDNode::MorphNodeTo(unsigned Opc, SDVTList L,
     OperandList[i].setUser(this);
     SDNode *N = OperandList[i].getVal();
     N->addUser(i, this);
-    ++N->UsesSize;
     DeadNodeSet.erase(N);
   }
 
@@ -4394,16 +4393,9 @@ const MVT *SDNode::getValueTypeList(MVT VT) {
 bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
   assert(Value < getNumValues() && "Bad value!");
 
-  // If there is only one value, this is easy.
-  if (getNumValues() == 1)
-    return use_size() == NUses;
-  if (use_size() < NUses) return false;
-
-  SDOperand TheValue(const_cast<SDNode *>(this), Value);
-
   // TODO: Only iterate over uses of a given value of the node
   for (SDNode::use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
-    if (*UI == TheValue) {
+    if (UI->getSDOperand().ResNo == Value) {
       if (NUses == 0)
         return false;
       --NUses;
@@ -4420,12 +4412,8 @@ bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
 bool SDNode::hasAnyUseOfValue(unsigned Value) const {
   assert(Value < getNumValues() && "Bad value!");
 
-  if (use_empty()) return false;
-
-  SDOperand TheValue(const_cast<SDNode *>(this), Value);
-
   for (SDNode::use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI)
-    if (UI->getSDOperand() == TheValue)
+    if (UI->getSDOperand().ResNo == Value)
       return true;
 
   return false;