[llvm] [X86] Recognize POP/ADD/SUB modifying rsp in getSPAdjust. (PR #114265)

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dyung wrote:

Just a heads up that one of our internal tests started failing which I bisected back to this commit. I am working on a reproducer and like the case @bjope mentioned, the problem only occurs when the program is compiled with debug information. In our case, the program seems to go into an infinite loop after your change.

https://github.com/llvm/llvm-project/pull/114265