diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index 2e3fb7d..aba3e15 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -1580,15 +1580,15 @@
 ///
 /// This routine involves a system call, and therefore should only be used
 /// in non-performance-critical code.
-static Optional<ino_t> getActualFileInode(const FileEntry *File) {
+static Optional<uint64_t> getActualFileUID(const FileEntry *File) {
   if (!File)
     return None;
-  
-  struct stat StatBuf;
-  if (::stat(File->getName(), &StatBuf))
+
+  uint64_t ID;
+  if (llvm::sys::fs::getUniqueID(File->getName(), ID))
     return None;
-    
-  return StatBuf.st_ino;
+
+  return ID;
 }
 
 /// \brief Get the source location for the given file:line:col triplet.
@@ -1617,7 +1617,7 @@
 
   // First, check the main file ID, since it is common to look for a
   // location in the main file.
-  Optional<ino_t> SourceFileInode;
+  Optional<uint64_t> SourceFileUID;
   Optional<StringRef> SourceFileName;
   if (!MainFileID.isInvalid()) {
     bool Invalid = false;
@@ -1638,10 +1638,10 @@
         const FileEntry *MainFile = MainContentCache->OrigEntry;
         SourceFileName = llvm::sys::path::filename(SourceFile->getName());
         if (*SourceFileName == llvm::sys::path::filename(MainFile->getName())) {
-          SourceFileInode = getActualFileInode(SourceFile);
-          if (SourceFileInode) {
-            if (Optional<ino_t> MainFileInode = getActualFileInode(MainFile)) {
-              if (*SourceFileInode == *MainFileInode) {
+          SourceFileUID = getActualFileUID(SourceFile);
+          if (SourceFileUID) {
+            if (Optional<uint64_t> MainFileUID = getActualFileUID(MainFile)) {
+              if (*SourceFileUID == *MainFileUID) {
                 FirstFID = MainFileID;
                 SourceFile = MainFile;
               }
@@ -1684,12 +1684,11 @@
 
   // If we haven't found what we want yet, try again, but this time stat()
   // each of the files in case the files have changed since we originally 
-  // parsed the file. 
+  // parsed the file.
   if (FirstFID.isInvalid() &&
-      (SourceFileName || 
+      (SourceFileName ||
        (SourceFileName = llvm::sys::path::filename(SourceFile->getName()))) &&
-      (SourceFileInode ||
-       (SourceFileInode = getActualFileInode(SourceFile)))) {
+      (SourceFileUID || (SourceFileUID = getActualFileUID(SourceFile)))) {
     bool Invalid = false;
     for (unsigned I = 0, N = local_sloc_entry_size(); I != N; ++I) {
       FileID IFileID;
@@ -1704,8 +1703,8 @@
       const FileEntry *Entry =FileContentCache? FileContentCache->OrigEntry : 0;
         if (Entry && 
             *SourceFileName == llvm::sys::path::filename(Entry->getName())) {
-          if (Optional<ino_t> EntryInode = getActualFileInode(Entry)) {
-            if (*SourceFileInode == *EntryInode) {
+          if (Optional<uint64_t> EntryUID = getActualFileUID(Entry)) {
+            if (*SourceFileUID == *EntryUID) {
               FirstFID = FileID::get(I);
               SourceFile = Entry;
               break;