[Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90018

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
On trunk, r265457 fixed 527.cam4_r in SPEC CPU 2017 with:

-march=native -Ofast -funroll-loops