[Bug tree-optimization/79390] [7 Regression] 10% performance drop in SciMark2 LU after r242550

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79390

--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the original report is fixed (-O3 -march-native).  But adding -ffast-math
still ends up regressing.

At this point it's probably appropriate to re-target to GCC 8.