https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119577
--- Comment #3 from Robin Dapp <rdapp at gcc dot gnu.org> --- I manage to have a quick look at the code now. It looks like we force live every induction and build slp instances for the IV increments. I don't think adjusting the actual IV creation in vectorizable_induction would be too involved, at least for the length-controlled case, but I wonder what to do with the increment. Right now we just vectorize it with the fitting vector type (this limits VF for some of the examples I'm looking at BTW where we could vectorize at a higher VF without the vectorized int induction). Is there precedent of how to handle such a situation? I.e. can we keep track of the affected stmts in the slp isntance and then "vectorize" with a scalar type? Or would we need to circumvent that altogether and adjust the existing scalar IV? Or rather create a new scalar IV and re-wire the uses?
