[Bug tree-optimization/80198] [6/7/8 Regression] does not vectorize generic inplace integer operation

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80198

--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
Yea.  The code that was recording NAME = NAME conditional equivalences was
largely disabled back in August.  They'll only be recorded now if one name is
cheaper to compute than the other.

So if the conditional equivalences are still a problem with this BZ, then we
need to look at the costing of the SSA_NAME's defining statement.