[Bug tree-optimization/68654] [6 Regression] CoreMark Pro performance degradation

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68654

--- Comment #19 from Jeffrey A. Law <law at redhat dot com> ---
What's initially more important than a particular improvement or degradation of
performance is bringing more stability to the coalescing results -- so that we
can focus on issues with coalescing rather than getting distracted by the
semi-random performance improvements/drops that we have now.