/// implicit. The implicit pointer is found via a waymarking algorithm
/// described in the programmer's manual:
///
-/// http://www.llvm.org/docs/ProgrammersManual.html#UserLayout
+/// http://www.llvm.org/docs/ProgrammersManual.html#the-waymarking-algorithm
///
/// This is essentially the single most memory intensive object in LLVM because
/// of the number of uses in the system. At the same time, the constant time
enum PrevPtrTag { zeroDigitTag, oneDigitTag, stopTag, fullStopTag };
/// Constructor
- Use(PrevPtrTag tag) : Val(0) { Prev.setInt(tag); }
+ Use(PrevPtrTag tag) : Val(nullptr) { Prev.setInt(tag); }
public:
operator Value *() const { return Val; }