[llvm] [X86] Fix overflow with large stack probes on x86-64 (PR #113219)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@mconst is the fix imminent? currently the expensive checks bots are failing due to this.

I'd also suggest you add `-verify-machineinstrs ` to the RUN commands in the stack-clash test files to better expose this.

https://github.com/llvm/llvm-project/pull/113219