- /// getElement - Return specified element.
- MetadataBase *getElement(unsigned i) const {
- assert(i < getNumElements() && "Invalid element number!");
- return Node[i];
- }
-
- /// getNumElements - Return number of NamedMDNode elements.
- unsigned getNumElements() const {
- return Node.size();
- }
-
- /// addElement - Add metadata element.
- void addElement(MetadataBase *M) {
- Node.push_back(TrackingVH<MetadataBase>(M));
- }
-
- typedef SmallVectorImpl<TrackingVH<MetadataBase> >::iterator elem_iterator;
- typedef SmallVectorImpl<TrackingVH<MetadataBase> >::const_iterator
- const_elem_iterator;
- bool elem_empty() const { return Node.empty(); }
- const_elem_iterator elem_begin() const { return Node.begin(); }
- const_elem_iterator elem_end() const { return Node.end(); }
- elem_iterator elem_begin() { return Node.begin(); }
- elem_iterator elem_end() { return Node.end(); }
-
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const NamedMDNode *) { return true; }
- static bool classof(const Value *V) {
- return V->getValueID() == NamedMDNodeVal;
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// MetadataContext -
-/// MetadataContext handles uniquing and assignment of IDs for custom metadata
-/// types. Custom metadata handler names do not contain spaces. And the name
-/// must start with an alphabet. The regular expression used to check name
-/// is [a-zA-Z$._][a-zA-Z$._0-9]*
-class MetadataContext {
-public:
- typedef std::pair<unsigned, TrackingVH<MDNode> > MDPairTy;
- typedef SmallVector<MDPairTy, 2> MDMapTy;
- typedef DenseMap<const Instruction *, MDMapTy> MDStoreTy;
- friend class BitcodeReader;
-private:
-
- /// MetadataStore - Collection of metadata used in this context.
- MDStoreTy MetadataStore;
-
- /// MDHandlerNames - Map to hold metadata handler names.
- StringMap<unsigned> MDHandlerNames;
-
-public:
- /// registerMDKind - Register a new metadata kind and return its ID.
- /// A metadata kind can be registered only once.
- unsigned registerMDKind(StringRef Name);
-
- /// getMDKind - Return metadata kind. If the requested metadata kind
- /// is not registered then return 0.
- unsigned getMDKind(StringRef Name) const;
-
- /// isValidName - Return true if Name is a valid custom metadata handler name.
- static bool isValidName(StringRef Name);