On Thu, Mar 07, 2024 at 11:45:45AM +0100, Richard Biener wrote: > The question is, whether a NULL cc_use_loc (find_single_use returning > NULL) means "there is no use" or it can mean "huh, don't know, maybe > more than one, maybe I was too stupid to indentify the single use". > The implementation suggests it's all broken ;)
It specifically means there is not a *single* use (or it could not find what it was, perhaps). It does not mean there is no use. There is not much in combine that cares about dead code anyway, earier passes should have taken care of that ;-) All as documented. Segher
