+ class ConstraintInfo {
+ enum { None, EarlyClobber, Tied } Kind;
+ unsigned OtherTiedOperand;
+ public:
+ ConstraintInfo() : Kind(None) {}
+
+ static ConstraintInfo getEarlyClobber() {
+ ConstraintInfo I;
+ I.Kind = EarlyClobber;
+ return I;
+ }
+
+ static ConstraintInfo getTied(unsigned Op) {
+ ConstraintInfo I;
+ I.Kind = Tied;
+ I.OtherTiedOperand = Op;
+ return I;
+ }
+
+ bool isNone() const { return Kind == None; }
+ bool isEarlyClobber() const { return Kind == EarlyClobber; }
+ bool isTied() const { return Kind == Tied; }
+
+ unsigned getTiedOperand() const {
+ assert(isTied());
+ return OtherTiedOperand;
+ }
+ };
+