https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113134
--- Comment #5 from JuzheZhong <juzhe.zhong at rivai dot ai> --- (In reply to Tamar Christina from comment #4) > (In reply to JuzheZhong from comment #3) > > I guess this code is just disabling partial vector for length for now. > > > > And need me to test and port this part for length in the followup patches. > > > > Am I right ? > > Yeah, it needed to safely not allow it through for now. Once implemented > you'll hit an assert in vectorizable_live_operations where you need to > provide a way to also get the first active element from a vector. So for a length target, I enable cbranch optab but no vcond_mask_len optab. Will it behavior wrong ? Another question is could you give me more hints about vectorizable_live_operation? I thought vectorizable_live_operation is doing extract last active element, I didn't see extract first active element.
