[llvm] [BasicBlockSections] Apply path cloning with -basic-block-sections. (PR #68860)

[Matthias Braun via llvm-commits]

================
@@ -0,0 +1,227 @@
+//===-- BasicBlockPathCloning.cpp ---=========-----------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// BasicBlockPathCloning implementation.
----------------
MatzeB wrote:

Use 
```
/// \file
/// ...
```
to expose the commen to doxygen.

https://github.com/llvm/llvm-project/pull/68860