swift

2acf5b6b - Refactoring of the TaskLocal::Item

Refactoring of the TaskLocal::Item Replace NextLinkType with Item::Kind with more clear definition. Use llvm::PointerIntPair<>. Use hierarchy of classes instead of optional fields inside Item. Combined Storage::copyToOnlyOnlyFromCurrentGroup() into Storage::initializeLinkParent(). Also create parent task marker when copying items created inside withTaskGroup(). Removed Storage::peekHeadLinkType().