-//===----------------------------------------------------------------------===//
-/// MetadataContext - MetadataContext handles uniquing and assignment of IDs for
-/// custom metadata types.
-///
-class MetadataContext {
- MetadataContext(MetadataContext&); // DO NOT IMPLEMENT
- void operator=(MetadataContext&); // DO NOT IMPLEMENT
-
- MetadataContextImpl *const pImpl;
- friend class Instruction;
-public:
- MetadataContext();
- ~MetadataContext();
-
- /// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
- unsigned getMDKindID(StringRef Name) const;
-
- /// isValidName - Return true if Name is a valid custom metadata handler name.
- static bool isValidName(StringRef Name);
-
- /// copyMD - If metadata is attached with Instruction In1 then attach
- /// the same metadata to In2.
- void copyMD(Instruction *In1, Instruction *In2);
-
- /// getMDKindNames - Populate client supplied SmallVector with the name for
- /// each custom metadata ID. ID #0 is not used, so it is filled in as empty.
- void getMDKindNames(SmallVectorImpl<StringRef> &) const;
-
- /// ValueIsDeleted - This handler is used to update metadata store
- /// when a value is deleted.
- void ValueIsDeleted(const Value *) {}
- void ValueIsDeleted(Instruction *Inst);
- void ValueIsRAUWd(Value *V1, Value *V2);
-
- /// ValueIsCloned - This handler is used to update metadata store
- /// when In1 is cloned to create In2.
- void ValueIsCloned(const Instruction *In1, Instruction *In2);
-};
-