[llvm] [SelectionDAG] Handling Oversized Alloca Types under 32 bit Mode to Avoid Code Generator Crash (PR #71472)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> This does not look like the same issue as the one this PR is fixing. If it is reasonable, I prefer leaving this PR fixing the selection DAG, and open an separate issue for GlobalISel.
> 
> Does this sound reasonable?

Sounds like there's no issue, and could just use a test. The target also doesn't matter, you should be able to use aarch64 with fewer issues 

https://github.com/llvm/llvm-project/pull/71472