[Bug tree-optimization/63677] Failure to constant fold with vectorization.

[belagod at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63677

--- Comment #1 from Tejas Belagod <belagod at gcc dot gnu.org> ---
There is similar behaviour on aarch64. So, it doesn't look like a backend
issue.