https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63202
--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> --- I'm not sure rewriting the pattern to assume_aligned would be useful. After all the user could already use assume_aligned directly. I was more thinking of cases when VRP/CCP can prove alignment in other ways from the code, and the vectorizer should use that. Good point that the fallback is not for unalignment. Should probably use a more fancy test case where unalignment matters for the cost model. One interesting case is avoiding the need for tail code when the iteration is not a multiple of the vector length.
