[clang] [Clang] Fix assertion failure (#189260) (PR #189305)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thank you for working on this! You should also add test coverage to `clang/test/CodeGen/` which demonstrates the fix and that we generate the correct IR. You should also add a release note to `clang/docs/ReleaseNotes.rst` so users know about the fix.

https://github.com/llvm/llvm-project/pull/189305