1 files changed, 15 insertions, 4 deletions
diff --git a/source/Utility/UUID.cpp b/source/Utility/UUID.cpp
index b00878792c7e..2a73f9a482ff 100644
--- a/source/Utility/UUID.cpp
+++ b/source/Utility/UUID.cpp
@@ -1,9 +1,8 @@
 //===-- UUID.cpp ------------------------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
@@ -110,3 +109,15 @@ size_t UUID::SetFromStringRef(llvm::StringRef str, uint32_t num_uuid_bytes) {
   // Else return zero to indicate we were not able to parse a UUID value
   return 0;
 }
+
+size_t UUID::SetFromOptionalStringRef(llvm::StringRef str, 
+                                      uint32_t num_uuid_bytes) {
+  size_t num_chars_consumed = SetFromStringRef(str, num_uuid_bytes);
+  if (num_chars_consumed) {
+    if (llvm::all_of(m_bytes, [](uint8_t b) { return b == 0; }))
+        Clear();
+  }
+  
+  return num_chars_consumed;
+}
+