1 files changed, 58 insertions, 0 deletions
diff --git a/llvm/lib/IR/MetadataImpl.h b/llvm/lib/IR/MetadataImpl.h
new file mode 100644
index 000000000000..b4188dd7d3ee
--- /dev/null
+++ b/llvm/lib/IR/MetadataImpl.h
@@ -0,0 +1,58 @@
+//===- MetadataImpl.h - Helpers for implementing metadata -----------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file has private helpers for implementing metadata types.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_METADATAIMPL_H
+#define LLVM_IR_METADATAIMPL_H
+
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/IR/Metadata.h"
+
+namespace llvm {
+
+template <class T, class InfoT>
+static T *getUniqued(DenseSet<T *, InfoT> &Store,
+                     const typename InfoT::KeyTy &Key) {
+  auto I = Store.find_as(Key);
+  return I == Store.end() ? nullptr : *I;
+}
+
+template <class T> T *MDNode::storeImpl(T *N, StorageType Storage) {
+  switch (Storage) {
+  case Uniqued:
+    llvm_unreachable("Cannot unique without a uniquing-store");
+  case Distinct:
+    N->storeDistinctInContext();
+    break;
+  case Temporary:
+    break;
+  }
+  return N;
+}
+
+template <class T, class StoreT>
+T *MDNode::storeImpl(T *N, StorageType Storage, StoreT &Store) {
+  switch (Storage) {
+  case Uniqued:
+    Store.insert(N);
+    break;
+  case Distinct:
+    N->storeDistinctInContext();
+    break;
+  case Temporary:
+    break;
+  }
+  return N;
+}
+
+} // end namespace llvm
+
+#endif