[llvm] [TailDuplicator] Do not restrict the computed gotos (PR #114990)

[via llvm-commits]

bgra8 wrote:

We (at google) have bisected a huge increase in memory use during compilation (for some specific source files) at this revision.

The previous version compiles those files using less than 4GB of memory while at this revision the compiler exceeds 16GB (didn't try to use larger memory limits)

Specifically the `clang` process eventually runs out of memory when executed in a shell with `ulimit -Sd 16291456`

The crashing stack due to out of memory shows:

```
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module '<module name redacted>'.
4.      Running pass 'Early Tail Duplication' on function '@<function name redacted>'
```

Working on a reproducer.


https://github.com/llvm/llvm-project/pull/114990