[llvm] [CodeGen] Don't codegen the weak function when there is a defined non-weak symbol (PR #76040)

[Quentin Dian via llvm-commits]

DianQK wrote:

Alternative #76287.

I also found a way I could solve this issue by writing symbol resolution. This is similar to the `llvm-lto2` command.

https://github.com/llvm/llvm-project/pull/76040