[llvm] [LLVM] [X86] Fix integer overflows in frame layout for huge frames (PR #101840)

[via llvm-commits]

zmodem wrote:

> I believe that's the same invocation I looked at to the get the assembly I posted above.

Yes, the source code is reduced, but it's the same origin.

> If I'm understanding everything correctly, currently that code is miscompiled on 32-bit x86

What makes you say it's miscompiled?

> But it does mean it should be upgraded to a proper backend error

Why backend error? If the source code is doing something erroneous, shouldn't it be a proper clang error?

https://github.com/llvm/llvm-project/pull/101840