[Bug target/101142] [11/12 regression] Regression due to supporting bitwise operators on AVX512 masks.

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101142

--- Comment #6 from Hongtao.liu <crazylht at gmail dot com> ---
Not sure backport to GCC11, this patch only modifies the cost model of RA on
the back end, no functional changes.