1//===- MetadataImpl.h - Helpers for implementing metadata -----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file has private helpers for implementing metadata types.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_IR_METADATAIMPL_H
15#define LLVM_IR_METADATAIMPL_H
16
17#include "llvm/ADT/DenseSet.h"
18#include "llvm/IR/Metadata.h"
19
20namespace llvm {
21
22template <class T, class InfoT>
23static T *getUniqued(DenseSet<T *, InfoT> &Store,
24                     const typename InfoT::KeyTy &Key) {
25  auto I = Store.find_as(Key);
26  return I == Store.end() ? nullptr : *I;
27}
28
29template <class T, class StoreT>
30T *MDNode::storeImpl(T *N, StorageType Storage, StoreT &Store) {
31  switch (Storage) {
32  case Uniqued:
33    Store.insert(N);
34    break;
35  case Distinct:
36    N->storeDistinctInContext();
37    break;
38  case Temporary:
39    break;
40  }
41  return N;
42}
43
44} // end namespace llvm
45
46#endif
47