[Bug tree-optimization/92351] [10 Regression] Wrong code with -O3 -match=skylake since r277569

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92351

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Using -fdbg-cnt=vect_loop:4:6 will reduce vectorizer to one vectorization + one
epilogue vectorization that causes the miscompilation.