[Bug tree-optimization/71437] [7 regression' Performance regression after r235817

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71437

--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 38652
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38652&action=edit
test-case to reproduce

Need to be compiled with -O3 -m32 -ffast-math on x86-64.