[clang] [llvm] Handle leading underscores in update_cc_test_checks.py (PR #121800)

[Momchil Velikov via llvm-commits]

momchil-velikov wrote:

> Isn't it a bug that clang reports an incorrect mangled name?

I reckon the mangled name reported by clang is correct in the sense it's the final symbol name in the assembler/object file.



https://github.com/llvm/llvm-project/pull/121800