[llvm] [DebugInfo] Add a specification attribute to LLVM DebugInfo (PR #115362)

[Augusto Noronha via llvm-commits]

augusto2112 wrote:

Testing locally, looks like `fcmp-fadd-select.ll` is failing with/without my changes, so I'm merging this.

https://github.com/llvm/llvm-project/pull/115362