[llvm] [GVNSink] Fix #77415: GVNSink fails to optimize LLVM IR with debug info (PR #77419)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Looks like this breaks tests on windows: http://45.33.8.238/win/88058/step_11.txt
> 
> Please take a look and revert for now if it takes a while to fix.

I cannot reproduce this problem on my local machine.

https://github.com/llvm/llvm-project/pull/77419