[Bug middle-end/68542] [6 Regression] 10% 481.wrf performance regression

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68542

--- Comment #3 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
I enhanced a patch for masked stores movement by guard on zero mask - move all
possible producers for stored value and performance degradation disappeared.
the patch will be re-designed and send for review next week.