[Bug tree-optimization/78972] [6/7/8 Regression] poor x86 simd instruction scheduling

[maxim.yegorushkin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78972

--- Comment #14 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to Jeffrey A. Law from comment #13)
> Folks where unhappy with various aspects of that patch.  Bernd left Red Hat
> shortly thereafter and the patch hasn't been updated since his departure.

I hit this issue too, the performance regression is 10-15% since gcc-4.9. We
have to use -fno-tree-ter to mitigate.