[clang] [clang][Sema] Propagate `volatile` during derived-to-base conversion (PR #127824)

[Antonio Frighetto via cfe-commits]

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@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -std=c++20 -fsyntax-only -ast-dump %s | FileCheck %s
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antoniofrighetto wrote:

Added a test in CodeGen too, thanks!

https://github.com/llvm/llvm-project/pull/127824