[llvm] [llvm][CodeGen] Fix the issue caused by live interval checking in window scheduler (PR #123184)

[Hua Tian via llvm-commits]

huaatian wrote:

The '192B' is a random slot index, which is the cause of the crashing.
![image](https://github.com/user-attachments/assets/58b8ee3a-e650-47c9-9670-4143f0c30be7)


https://github.com/llvm/llvm-project/pull/123184