Something like:

    if(AskLLM("Does function signature+name look like error handling code")) {
        TurnOffInliner();
    }

is actually probably a lot more effective than you'd think (generating PGO traces with a machine learning tool is apparently a thing that sort of works)

Not exactly the same, but intrinsics in some languages are purely name+signature matched.

Sure, but will anyone name a method like "__nvidia_experimental_feature_xyz_v1"?

Yes.

E.g "__nvidia_experimental_feature_xyz_v1"