[llvm-branch-commits] [llvm] release/20.x: [TailDuplicator] Do not restrict the computed gotos (#114990) (PR #130585)

[via llvm-branch-commits]

DianQK wrote:

> @DianQK (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix. When you are done, please add the release:note label to this PR.

Fix a performance regression related to computed gotos, which usually affects interpreter projects. If you are using Clang 19, adding `-mllvm -tail-dup-pred-size=100000` should restore the original performance.

https://github.com/llvm/llvm-project/pull/130585