[Bug ipa/84628] attribute(warning/error) functions should not be merged together

[jay.krell at cornell dot edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84628

--- Comment #5 from Jay <jay.krell at cornell dot edu> ---
I know. We just noticed and were surprised. It isn't clear if this is what
users would expect or not. Warn because they wrote code that "merely looks
bad", or only if the compiler decides after analysis that it really is bad?
Anyway, there are two points here I think. One is far more arguable than the
other. I don't think the small case shown should error.