1 files changed, 68 insertions, 0 deletions
diff --git a/include/llvm/DebugInfo/GSYM/FileEntry.h b/include/llvm/DebugInfo/GSYM/FileEntry.h
new file mode 100644
index 000000000000..228b4efa0656
--- /dev/null
+++ b/include/llvm/DebugInfo/GSYM/FileEntry.h
@@ -0,0 +1,68 @@
+//===- FileEntry.h ----------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_GSYM_FILEENTRY_H
+#define LLVM_DEBUGINFO_GSYM_FILEENTRY_H
+
+#include "llvm/ADT/DenseMapInfo.h"
+#include "llvm/ADT/Hashing.h"
+#include <functional>
+#include <stdint.h>
+#include <utility>
+
+namespace llvm {
+namespace gsym {
+
+/// Files in GSYM are contained in FileEntry structs where we split the
+/// directory and basename into two different strings in the string
+/// table. This allows paths to shared commont directory and filename
+/// strings and saves space.
+struct FileEntry {
+
+  /// Offsets in the string table.
+  /// @{
+  uint32_t Dir = 0;
+  uint32_t Base = 0;
+  /// @}
+
+  FileEntry() = default;
+  FileEntry(uint32_t D, uint32_t B) : Dir(D), Base(B) {}
+
+  // Implement operator== so that FileEntry can be used as key in
+  // unordered containers.
+  bool operator==(const FileEntry &RHS) const {
+    return Base == RHS.Base && Dir == RHS.Dir;
+  };
+  bool operator!=(const FileEntry &RHS) const {
+    return Base != RHS.Base || Dir != RHS.Dir;
+  };
+};
+
+} // namespace gsym
+
+template <> struct DenseMapInfo<gsym::FileEntry> {
+  static inline gsym::FileEntry getEmptyKey() {
+    uint32_t key = DenseMapInfo<uint32_t>::getEmptyKey();
+    return gsym::FileEntry(key, key);
+  }
+  static inline gsym::FileEntry getTombstoneKey() {
+    uint32_t key = DenseMapInfo<uint32_t>::getTombstoneKey();
+    return gsym::FileEntry(key, key);
+  }
+  static unsigned getHashValue(const gsym::FileEntry &Val) {
+    return llvm::hash_combine(DenseMapInfo<uint32_t>::getHashValue(Val.Dir),
+                              DenseMapInfo<uint32_t>::getHashValue(Val.Base));
+  }
+  static bool isEqual(const gsym::FileEntry &LHS, const gsym::FileEntry &RHS) {
+    return LHS == RHS;
+  }
+};
+
+} // namespace llvm
+#endif // #ifndef LLVM_DEBUGINFO_GSYM_FILEENTRY_H