[libunwind] [openmp] [lld] [clang] [mlir] [clang-tools-extra] [flang] [compiler-rt] [lldb] [llvm] [BranchFolding] Fix missing predecessors of landing-pad (PR #77608)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

> > > This keeps CFG as only have one entry which is required by LiveDebugValues
> > 
> > 
> > If we just want to make LiveDebugValues happy, should it better to remove these died BB instead?
> 
> This died BB was already removed by BranchFolder. See rebased test diff. We just want to salvage its successors info.

I see. I thought the successors are removed too.

https://github.com/llvm/llvm-project/pull/77608