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

[Nikita Popov via llvm-commits]

nikic wrote:

> > Causes a crash in stage2 clang: https://llvm-compile-time-tracker.com/show_error.php?commit=e36825ea6feefeef44cca7710d775fba287d3fb2
> 
> Hi @nikic It should be fixed now.

The stage2 build still fails, though in a different way: https://llvm-compile-time-tracker.com/show_error.php?commit=d14b351d616d40f8b8c153923f96467e256fe931

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