[llvm] Minimal unwinding information (DWARF CFI) checker (PR #145633)

[Simon Tatham via llvm-commits]

================
@@ -0,0 +1,63 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file declares DWARFCFIAnalysis class.
----------------
statham-arm wrote:

This would still be improved by an explanation of what the class _is_, and what it's for.

Who makes a `DWARFCFIAnalysis`? Something internal to this directory, or the client application? What do they use it for? Does it maintain any ongoing state that might affect whether you needed to throw it away and make another one?

https://github.com/llvm/llvm-project/pull/145633