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diff --git a/contrib/llvm-project/llvm/include/llvm/Support/FileUtilities.h b/contrib/llvm-project/llvm/include/llvm/Support/FileUtilities.h
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+//===- llvm/Support/FileUtilities.h - File System Utilities -----*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a family of utility functions which are useful for doing
+// various things with files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_FILEUTILITIES_H
+#define LLVM_SUPPORT_FILEUTILITIES_H
+
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+
+namespace llvm {
+
+  /// DiffFilesWithTolerance - Compare the two files specified, returning 0 if
+  /// the files match, 1 if they are different, and 2 if there is a file error.
+  /// This function allows you to specify an absolute and relative FP error that
+  /// is allowed to exist.  If you specify a string to fill in for the error
+  /// option, it will set the string to an error message if an error occurs, or
+  /// if the files are different.
+  ///
+  int DiffFilesWithTolerance(StringRef FileA,
+                             StringRef FileB,
+                             double AbsTol, double RelTol,
+                             std::string *Error = nullptr);
+
+
+  /// FileRemover - This class is a simple object meant to be stack allocated.
+  /// If an exception is thrown from a region, the object removes the filename
+  /// specified (if deleteIt is true).
+  ///
+  class FileRemover {
+    SmallString<128> Filename;
+    bool DeleteIt;
+  public:
+    FileRemover() : DeleteIt(false) {}
+
+    explicit FileRemover(const Twine& filename, bool deleteIt = true)
+      : DeleteIt(deleteIt) {
+      filename.toVector(Filename);
+    }
+
+    ~FileRemover() {
+      if (DeleteIt) {
+        // Ignore problems deleting the file.
+        sys::fs::remove(Filename);
+      }
+    }
+
+    /// setFile - Give ownership of the file to the FileRemover so it will
+    /// be removed when the object is destroyed.  If the FileRemover already
+    /// had ownership of a file, remove it first.
+    void setFile(const Twine& filename, bool deleteIt = true) {
+      if (DeleteIt) {
+        // Ignore problems deleting the file.
+        sys::fs::remove(Filename);
+      }
+
+      Filename.clear();
+      filename.toVector(Filename);
+      DeleteIt = deleteIt;
+    }
+
+    /// releaseFile - Take ownership of the file away from the FileRemover so it
+    /// will not be removed when the object is destroyed.
+    void releaseFile() { DeleteIt = false; }
+  };
+} // End llvm namespace
+
+#endif