[clang] [clang] Emit bad shift warnings (PR #70307)

[Alexander Kornienko via cfe-commits]

alexfh wrote:

I see. Thanks for the explanation and for the suggestion on how to fix that. Actually, the only instance I've seen, had already been fixed upstream (https://hg.openjdk.org/jdk/jdk/rev/71495d579a65), so the impact of this compiler behavior change is quite low in my part of the universe.

https://github.com/llvm/llvm-project/pull/70307