One rule of Latin stress is that it can never go farther back than the antepenult: the third syllable from the end. For example, we have cár-men "song", cár-mi-ne "with a song", and car-mí-ni-bus "with songs", but never *cár-mi-ni-bus.
When an enclitic is added to a word, does it count against this three-syllable limit? For example, "with a song" is cár-mi-ne; if I want to say "…or with a song", would that be cár-mi-ne=ve, or car-mí-ne=ve?
EDIT: Or perhaps car-mi-né=ve, a third option proposed by Joonas Ilmavirta in the comments?
(Ideally I'd like an answer about Classical Latin, but unfortunately stress wasn't marked in Classical times. It should be possible to answer about later Latin, though, because later texts sometimes used an acute accent to mark stress.)