[Bug tree-optimization/71361] [7 Regression] Changes in ivopts caused perf regression on x86

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71361

--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
Leslie, you'd need to bisect.  Probably something from Bin in the summer of
2017.  Not something we're likely to backport.