[APINotes] Fix a few accidental refactoring artifacts

This fixes a few breakages introduced during upstreaming.

Author: egorzhdan

clang/lib/APINotes/APINotesReader.cpp

@@ -81,9 +81,9 @@ class VersionedTableInfo {
       auto version = ReadVersionTuple(Data);
       const auto *DataBefore = Data;
       (void)DataBefore;
+      auto UnversionedData = Derived::readUnversioned(Key, Data);
       assert(Data != DataBefore &&
              "Unversioned data reader didn't move pointer");
-      auto UnversionedData = Derived::readUnversioned(Key, Data);
       Result.push_back({version, UnversionedData});
     }
     return Result;
@@ -148,7 +148,7 @@ class IdentifierTableInfo {
   external_key_type GetExternalKey(internal_key_type Key) { return Key; }
 
   hash_value_type ComputeHash(internal_key_type Key) {
-    return llvm::hash_value(Key);
+    return llvm::djbHash(Key);
   }
 
   static bool EqualKey(internal_key_type LHS, internal_key_type RHS) {
@@ -1797,8 +1797,8 @@ APINotesReader::Create(std::unique_ptr<llvm::MemoryBuffer> InputBuffer,
 template <typename T>
 APINotesReader::VersionedInfo<T>::VersionedInfo(
     llvm::VersionTuple Version,
-    llvm::SmallVector<std::pair<llvm::VersionTuple, T>, 1> Results)
-    : Results(std::move(Results)) {
+    llvm::SmallVector<std::pair<llvm::VersionTuple, T>, 1> R)
+    : Results(std::move(R)) {
 
   assert(!Results.empty());
   assert(std::is_sorted(

clang/lib/APINotes/APINotesWriter.cpp

@@ -128,6 +128,7 @@ class APINotesWriter::Implementation {
   SelectorID getSelector(ObjCSelectorRef SelectorRef) {
     // Translate the selector reference into a stored selector.
     StoredObjCSelector Selector;
+    Selector.NumArgs = SelectorRef.NumArgs;
     Selector.Identifiers.reserve(SelectorRef.Identifiers.size());
     for (auto piece : SelectorRef.Identifiers)
       Selector.Identifiers.push_back(getIdentifier(piece));