[llvm] [SimplifyCFG] Fix hoisting problem in SimplifyCFG (PR #78615)

[Quentin Dian via llvm-commits]

https://github.com/DianQK commented:

These things can make reviewing easier.

1. Use [godbot](https://llvm.godbolt.org/) in PR descriptions
2. Add a Pre-commit to show the impact of the changes. e.g. #70580
3. Add a test case from the issue to PhaseOrder?

I'll start reviewing as soon as possible. :3 (I wasn't getting around to it this weekend.)

https://github.com/llvm/llvm-project/pull/78615