1 files changed, 74 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h b/contrib/llvm-project/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h
new file mode 100644
index 000000000000..858f224777db
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h
@@ -0,0 +1,74 @@
+//===- StringEntryToDwarfStringPoolEntryMap.h -------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H
+#define LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H
+
+#include "DWARFLinkerGlobalData.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/DWARFLinker/StringPool.h"
+
+namespace llvm {
+namespace dwarf_linker {
+namespace parallel {
+
+/// This class creates a DwarfStringPoolEntry for the corresponding StringEntry.
+class StringEntryToDwarfStringPoolEntryMap {
+public:
+  StringEntryToDwarfStringPoolEntryMap(LinkingGlobalData &GlobalData)
+      : GlobalData(GlobalData) {}
+  ~StringEntryToDwarfStringPoolEntryMap() {}
+
+  /// Create DwarfStringPoolEntry for specified StringEntry if necessary.
+  /// Initialize DwarfStringPoolEntry with initial values.
+  DwarfStringPoolEntryWithExtString *add(const StringEntry *String) {
+    DwarfStringPoolEntriesTy::iterator it = DwarfStringPoolEntries.find(String);
+
+    if (it == DwarfStringPoolEntries.end()) {
+      DwarfStringPoolEntryWithExtString *DataPtr =
+          GlobalData.getAllocator()
+              .Allocate<DwarfStringPoolEntryWithExtString>();
+      DataPtr->String = GlobalData.translateString(String->getKey());
+      DataPtr->Index = DwarfStringPoolEntry::NotIndexed;
+      DataPtr->Offset = 0;
+      DataPtr->Symbol = nullptr;
+      it = DwarfStringPoolEntries.insert(std::make_pair(String, DataPtr)).first;
+    }
+
+    assert(it->second != nullptr);
+    return it->second;
+  }
+
+  /// Returns already existed DwarfStringPoolEntry for the specified
+  /// StringEntry.
+  DwarfStringPoolEntryWithExtString *
+  getExistingEntry(const StringEntry *String) const {
+    DwarfStringPoolEntriesTy::const_iterator it =
+        DwarfStringPoolEntries.find(String);
+
+    assert(it != DwarfStringPoolEntries.end());
+    assert(it->second != nullptr);
+    return it->second;
+  }
+
+  /// Erase contents of StringsForEmission.
+  void clear() { DwarfStringPoolEntries.clear(); }
+
+protected:
+  using DwarfStringPoolEntriesTy =
+      DenseMap<const StringEntry *, DwarfStringPoolEntryWithExtString *>;
+  DwarfStringPoolEntriesTy DwarfStringPoolEntries;
+
+  LinkingGlobalData &GlobalData;
+};
+
+} // end of namespace parallel
+} // end of namespace dwarf_linker
+} // end of namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H