vitalybuka wrote:

> I think 
> [llvm/llvm-test-suite#190](https://github.com/llvm/llvm-test-suite/pull/190) 
> should fix this issue, but haven't tested on an affected arch.
> 
> I'm a bit worried that we don't have a sanitizer to catch this issue (the 
> negative left shift issue is an unrelated one).

`-fsanitize=local-bounds` is quite related, but I guess InstCombine happens 
before the check inserted

https://github.com/llvm/llvm-project/pull/119225
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