[llvm] [TailDuplicator] Determine if computed gotos using `blockaddress` (PR #132536)

[Alexander Kornienko via llvm-commits]

alexfh wrote:

@arsenm @fhahn @nikic do you feel like this review is going to converge today? If not, I think, the right approach is to commit the revert first - https://github.com/llvm/llvm-project/pull/132431 and then reland the original commit together with this fix rather than keeping LLVM trunk in effectively a broken state.

https://github.com/llvm/llvm-project/pull/132536