[llvm] Fix stack layout for frames larger than 2gb (PR #84114)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

If you take a look at the tests I've updated in f92fa7e2cf38341211af262b21c568bef4d76b10 - these should now fail (I'd recommend adding -verify-machineinstrs to X86/huge-stack.ll test as well)

https://github.com/llvm/llvm-project/pull/84114