[llvm] [DeadStoreElimination] Optimize tautological assignments (PR #75744)

[Shreyansh Chouhan via llvm-commits]

BK1603 wrote:

Hi @nikic, I am able to build target stage2 locally without any issues after the latest push.
```
-- Build files have been written to: /work/llvm-project/release/tools/clang/stage2-bins
[3806/3809] Performing build step for 'stage2'
[4941/4941] Linking CXX executable bin/obj2yaml
[3807/3809] No install step for 'stage2'
[3809/3809] Completed 'stage2'
```

I'm not sure how the job is triggered for remote builds, can you please check again?

https://github.com/llvm/llvm-project/pull/75744