Comment # 4 on bug 1153314 from Tom de Vries

(In reply to Tom de Vries from comment #3)
> In case 3, use_enum_fallback returns true, because llvm version is 8
> (required to be at least 8 to avoid fallback). 

Sorry, that should obviously be:
...
In case 3, use_enum_fallback returns false, because llvm version is 8
(required to be at least 8 to avoid fallback). 
...