[Bug rtl-optimization/62151] [5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

[amker.cheng at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62151

--- Comment #13 from bin.cheng <amker.cheng at gmail dot com> ---
The check itself is suspicious too.  Why do we want to check elim_i2/elim_i1
when distributing REG_DEAD note from i1?