[Bug tree-optimization/100076] eembc/automotive/basefp01 has 30.3% regression compare -O2 -ftree-vectorize with -O2 on CLX/Znver3

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100076

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Is -O3 slower than -O3 -fno-tree-vectorize? If not, why?