[Bug tree-optimization/115484] [13/14/15 regression] if-to-switch prevents AVX vectorization

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115484

--- Comment #4 from Sam James <sjames at gcc dot gnu.org> ---
Not only does 8 vectorise it, but so does GCC 11, GCC 12. So, 9/10/13/14/15 are
broken.