[clang] [llvm] [llvm] Introduce MoveEntryAllocaInit pass (PR #164882)

[Nikita Popov via llvm-commits]

nikic wrote:

Basically by doing a second clang build where you pass
```
    -DCMAKE_C_COMPILER=path/to/stage1/build/bin/clang \
    -DCMAKE_CXX_COMPILER=path/to/stage1/build/bin/clang++ \
```
And then try to figure out why that gets miscompiled. Tracking down which part of clang exactly gets miscompiled tends to be pretty tricky though.

https://github.com/llvm/llvm-project/pull/164882