[Bug target/90204] [8/9 Regression] C code is optimized worse than C++

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90204

--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
Cost_model for Function vect_enhance_data_refs_alignment are quite tunable.

More benchmarks are needed if we want to do so.