[Bug tree-optimization/117776] [12/13/14/15 Regression] Missed optimization/vectorization opportunity (adding a even/odd check to an accumulator)

[nicula.iccc at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117776

--- Comment #7 from Ionuț Nicula <nicula.iccc at gmail dot com> ---
I see that if I replace the condition with `n%3==0`, or `n>3`, the code is
vectorized. So GCC is clearly capable of vectorizing this `accumulator +=
boolean` pattern.