+/// SDOperandPtr - A helper SDOperand pointer class, that can handle
+/// arrays of SDUse and arrays of SDOperand objects. This is required
+/// in many places inside the SelectionDAG.
+///
+class SDOperandPtr {
+ const SDOperand *ptr; // The pointer to the SDOperand object
+ int object_size; // The size of the object containg the SDOperand
+public:
+ SDOperandPtr() : ptr(0), object_size(0) {}
+
+ SDOperandPtr(SDUse * use_ptr) {
+ ptr = &use_ptr->getSDOperand();
+ object_size = (int)sizeof(SDUse);
+ }
+
+ SDOperandPtr(const SDOperand * op_ptr) {
+ ptr = op_ptr;
+ object_size = (int)sizeof(SDOperand);
+ }
+
+ const SDOperand operator *() { return *ptr; }
+ const SDOperand *operator ->() { return ptr; }
+ SDOperandPtr operator ++ () {
+ ptr = (SDOperand*)((char *)ptr + object_size);
+ return *this;
+ }
+
+ SDOperandPtr operator ++ (int) {
+ SDOperandPtr tmp = *this;
+ ptr = (SDOperand*)((char *)ptr + object_size);
+ return tmp;
+ }
+
+ SDOperand operator[] (int idx) const {
+ return *(SDOperand*)((char*) ptr + object_size * idx);
+ }
+};
+