[Bug rtl-optimization/61672] [4.9/4.10 Regression] Less redundant instructions deleted by pre_delete after r208113.

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61672

--- Comment #7 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
It really fixes the issue. Thanks.