[llvm] [offload][SYCL] Add SYCL Module splitting (PR #119713)

[Alexey Bader via llvm-commits]

================
@@ -0,0 +1,71 @@
+//===-------- SYCLSplitModule.h - module split ------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+// Functionality to split a module into callgraphs. A callgraph here is a set
+// of entry points with all functions reachable from them via a call. The result
+// of the split is new modules containing corresponding callgraph.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYCL_SPLIT_MODULE_H
----------------
bader wrote:

```suggestion
#ifndef LLVM_TRANSFORMS_UTILS_SYCLSPLITMODULE_H
```

https://github.com/llvm/llvm-project/pull/119713