[llvm] [InferAttrs] Infer return-only captures on libcalls (PR #132007)

[Nikita Popov via llvm-commits]

nikic wrote:

Based on the llvm-opt-benchmark results, I don't think we can do this until https://github.com/llvm/llvm-project/issues/131168 is resolved.

https://github.com/llvm/llvm-project/pull/132007