Follow-up to D129097.
It is no longer a requirement that the `QualType` passed to to
`DataflowAnalysisContext::getStableStorageLocation()` is not null. A
null type pass as an argument is only applicable as the pointee type
of a `std::nullptr_t` pointer.
Differential Revision: https://reviews.llvm.org/D131109
/// Returns a new storage location appropriate for `Type`.
///
- /// Requirements:
- ///
- /// `Type` must not be null.
+ /// A null `Type` is interpreted as the pointee type of `std::nullptr_t`.
StorageLocation &createStorageLocation(QualType Type);
/// Returns a stable storage location for `D`.