[llvm] [TaiDup] Allow large number of predecessors/successors without phis. (PR #116072)

[via llvm-commits]

DianQK wrote:

Are these inputs computed gotos or jump tables? If they are computed gotos, I think we can land #114990.

In fact, I don’t see any difference between computed gotos and jump tables—both can include or exclude many PHIs. To me, the only difference is that a jump table has one extra jump at the source level compared to a computed goto. So, I believe that when users use computed gotos, they expect longer compile times and larger code size.

https://github.com/llvm/llvm-project/pull/116072