[Bug tree-optimization/116583] vectorizable_slp_permutation cannot handle even/odd extract from VLA vector

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116583

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is now also the only reason gcc.dg/vect/slp-12a.c FAILs to SLP on aarch64
when SVE is enabled (riscv handles it with load-lanes for the group size of 8).